CN114586394A

CN114586394A - Communication method, device and system

Info

Publication number: CN114586394A
Application number: CN202080073459.8A
Authority: CN
Inventors: 欧阳国威; 刘俊
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2022-06-03
Also published as: WO2021217376A1

Abstract

The embodiment of the application provides a communication method, a communication device and a communication system, relates to the technical field of communication, and is used for reducing power consumption of a terminal for transmitting data on a direct connection communication interface. The scheme comprises the following steps: and the terminal receives resource information from the access network equipment, wherein the resource information is used for representing the resources of the direct connection communication interface. The terminal transmits data through the direct connection communication interface resource, and the terminal is in a radio resource control RRC-non-activated state. According to the method provided by the embodiment of the application, when the terminal is in the RRC-inactive state, the data can still be transmitted by using the direct connection communication interface resource from the access network equipment, so that the power consumption of the terminal for transmitting the data on the direct connection communication interface can be reduced, and the scheme can be suitable for a direct connection communication scene.

Description

Communication method, device and system

Technical Field

The embodiment of the application relates to the technical field of communication, in particular to a communication method, device and system.

Background

Vehicle to all (V2X) technology has a standing position in the Long Term Evolution (LTE) system and the New Radio (NR) system in the third generation partnership project (3 GPP) Release (R) 14 and R15 in SA2 and 3 GPP.

In V2X communication, terminal a can transmit data to terminal B on Sidelink resource (Sidelink resource) using PC5 interface between it and terminal B.

In V2X communication, for terminal a in a Radio Resource Control (RRC) -active state (e.g., idle state), a base station may configure a sidelink resource for terminal a using a network scheduled operation mode (network scheduled operation mode). Sidelink resources may be determined by a terminal autonomous selection resource mode (UE autonomous resources selection mode) for terminal a in an RRC-inactive state (e.g., idle state). The network scheduling operation mode may refer to that the base station configures the sidelink resource for the terminal in a dynamic scheduling or semi-static scheduling manner. The terminal autonomously selecting the resource mode may refer to selecting, by the terminal, a sidelink resource in a resource pool by way of resource frame listening (sending).

However, since the terminal needs to perform sending when determining the sidelink resource by using the terminal autonomous selection resource mode, and does not need to perform frame listening when using the network scheduling operation mode, the power consumption of the terminal for determining the sidelink resource by using the terminal autonomous selection resource mode is higher than the power consumption of the terminal for determining the sidelink resource by using the network scheduling operation mode, and thus the power consumption of the terminal in the RRC-inactive state for transmitting the sidelink data by using the sidelink resource is higher than the power consumption of the terminal in the RRC-active state for transmitting the sidelink data by using the sidelink resource.

Therefore, how to reduce the power consumption of the terminal for transmitting the sidelink data by using the sidelink resource is an urgent technical problem to be solved.

Disclosure of Invention

The embodiment of the application provides a communication method, a communication device and a communication system, which are used for reducing the power consumption of a terminal for transmitting data on a direct connection communication interface.

In order to achieve the above purpose, the embodiments of the present application provide the following technical solutions:

in a first aspect, an embodiment of the present application provides a communication method, including: the terminal receives resource information from the access network equipment, wherein the resource information is used for representing the resources of the direct connection communication interface; the terminal transmits data through the direct connection communication interface resource, wherein the terminal is in a Radio Resource Control (RRC) -inactive state or in an RRC-active state, and the terminal adopts a power saving mode. In the method, a terminal receives resource information from access network equipment, and the resource information is used for representing direct connection communication interface resources, and then data can be transmitted on the direct connection communication interface resources when the terminal is in a Radio Resource Control (RRC) -non-activated state or in an RRC-activated state and adopts a power saving mode. Therefore, for the terminal in the RRC-inactive state, the power consumption caused by the fact that the terminal acquires the direct connection communication interface resource by adopting the terminal self-selection resource mode for data transmission can be avoided. For the terminal in the RRC-activated state and adopting the power saving mode, the power consumption generated when the terminal transmits data on the direct connection communication interface resource can be still lower than the power consumption generated by the terminal in the RRC-activated state and not adopting the power saving mode. Therefore, the method provided by the embodiment of the application can reduce the power consumption of the terminal for transmitting data on the direct connection communication interface.

The direct connection communication interface is a communication interface for communicating between two terminals without being relayed by a base station. Direct communication interface communication involves data transmission, e.g., transmission of signaling and traffic data. The direct communication interface may also be referred to as a PC5 interface.

In a possible implementation manner of the first aspect, the resource information is obtained by the terminal from the access network device when the terminal is in the RRC-activated state.

In a possible implementation manner of the first aspect, the direct connection communication interface resource is a direct connection communication interface resource based on a network scheduling mode.

In a possible implementation manner of the first aspect, before the terminal transmits the data through the direct connection communication interface resource, the method provided in the embodiment of the present application may further include: the terminal determines that the network side (e.g., an access management network element) allows the terminal to transmit data using the direct communication interface resource based on the network scheduling mode. For example, the terminal receives information from the network side indicating that the terminal is allowed to transmit data using the direct communication interface resource based on the network scheduling mode. The direct connection communication interface resource based on the network scheduling mode can be a direct connection communication interface resource configured for the terminal by the access network device.

In a possible implementation manner of the first aspect, before the terminal receives the resource information from the access network device, the method further includes: and the terminal requests the access network equipment for the direct connection communication interface resource.

In a possible implementation manner of the first aspect, the data is data of a first application of the terminal, and the direct connection communication interface resource is used for transmitting the data of the first application. The first application is an application that uses the direct communication interface to perform communication, for example, information of a vulnerable road side unit (VRU) is transmitted/broadcast using the direct communication interface.

In a possible implementation manner of the first aspect, the first application belongs to an allowed service (allowed service) of the terminal. Further, the method may further include: the terminal determines the identity of the allowed services of the terminal.

In a possible implementation manner of the first aspect, the determining, by the terminal, an identifier of an allowed service of the terminal includes: the terminal receives an identification of allowed services from the terminal accessing the management network element. The terminal receives the identifier of the allowed service from the access management network element, which facilitates the terminal to determine the identifier of the service allowed to be transmitted by the terminal on the network side (e.g., the access management network element), in other words, the terminal cannot transmit the non-allowed service of the terminal.

In a possible implementation manner of the first aspect, the allowed service of the terminal may refer to: the terminal is allowed to operate on the direct communication interface. This facilitates the terminal to determine the traffic that the network side (e.g. the access management network element) allows the terminal to transmit on the direct communication interface.

In a possible implementation manner of the first aspect, the allowed service of the terminal may include not only a service that the terminal is allowed on the direct connection communication interface, but also a service that is allowed on a non-direct connection communication interface (e.g., a Uu communication interface), which is not limited in this embodiment of the present application.

In a possible implementation manner of the first aspect, before the terminal receives the identifier of the allowed service from the terminal of the access management network element, the method further includes: and the terminal sends the identification of at least one service to the access management network element. The identity of the at least one service is used to indicate the service requested by the terminal. At least one of the traffic may be traffic transmitted over a direct communication interface, e.g., V2X traffic. Correspondingly, the identifier of at least one service is used for indicating the terminal to request the service transmitted through the direct connection communication interface. Therefore, the network side can determine which services the terminal requests the data transmitted on the direct connection communication interface to come from, and the service the terminal requests to transmit is authorized.

In a possible implementation manner of the first aspect, the identifier of at least one service is carried in a first message, where the first message further includes a first parameter, and the first parameter is used to represent that a terminal requests to transmit data on a direct connection communication interface using a network scheduling mode. So as to indicate to the access management network element with the first parameter that the terminal requests transmission of data using the network scheduling mode on the direct communication interface. Therefore, the network side can determine that the terminal requires to use a network scheduling mode to transmit data on the direct connection communication interface, namely the terminal requests to transmit data by adopting the direct connection communication interface resources configured by the access network equipment.

In a possible implementation manner of the first aspect, before the terminal transmits data on the direct connection communication interface resource, the method further includes: the method for transmitting the data of the first application by the terminal through the direct connection communication interface resource based on the network scheduling mode includes that the terminal receives first indication information, the first indication information is used for indicating that the terminal is allowed to transmit the data of the first application in an RRC-inactive state, and correspondingly, the terminal transmits the data through the direct connection communication interface resource, and the method includes the following steps: and the terminal transmits the data of the first application through the direct connection communication interface resource according to the first indication information. Therefore, the terminal can determine that the data of the first application can be continuously transmitted on the direct connection communication interface resource acquired based on the network scheduling mode when the terminal is in the RRC-inactive state according to the first indication information. The first indication information may be an independent indication sent by the access network device to the terminal, or may be the direct connection communication interface resource itself configured by the access network device for the terminal. The terminal may send the data of the first application on the direct connection communication interface using the direct connection communication interface resource when the terminal is in the RRC-inactive state according to the independent indication. Or, the terminal may also send, according to the direct connection communication interface resource sent to the terminal by the access network device, the data of the first application on the direct connection communication interface by using the direct connection communication interface resource when the terminal is in the RRC-inactive state.

In a possible implementation manner of the first aspect, the receiving, by the terminal, the first indication information may be implemented by: the terminal receives the first indication information from the access management network element, or the terminal receives the first indication information from the access network equipment.

In a possible implementation manner of the first aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used for the terminal to transmit data on the direct connection communication interface. For example, the first link identification may comprise a first identification being a source address, i.e. the address of the terminal, and a second identification being a destination address, i.e. the address of the device receiving the data of the first application. The first link identifier may also be an identifier allocated by the terminal to the direct communication interface communication link, and is used to uniquely determine the direct communication interface communication link of the terminal.

In a possible implementation manner of the first aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface. It should be understood that the allowed traffic of the terminal may also be other traffic than the traffic allowed to be transmitted over the direct communication interface.

In a possible implementation manner of the first aspect, the method further includes: the terminal sends a first service quality parameter to an access management network element, wherein the first service quality parameter is a service quality parameter used by the terminal for requesting data transmission on a direct connection communication interface. The first quality of service parameter may be used for the access management network element to determine an authorized quality of service parameter for the terminal.

In a possible implementation manner of the first aspect, the method further includes: and the terminal receives the authorized service quality parameters from the access management network element, and the authorized service quality parameters are used for the terminal to transmit data on the direct connection communication interface.

In a possible implementation manner of the first aspect, the data is data of a first application, and the direct connection communication interface is a PC5 interface, where the method further includes: the terminal generates a PC5 interface quality of service Flow (PC5 QoS Flow) corresponding to the first application. The terminal associates the data of the first application to the PC5 interface quality of service flow. Wherein the first application may be one of the allowed services of the terminal. The PC5 interface quality of service flow may include a PC5 interface packet filter (packet filter), wherein a parameter value in the PC5 interface packet filter (packet filter) is an identification of the first application. For example, the one parameter may be a PC5 interface quality of service Flow identifier (PC5 QoS Flow identifier, PFI). The terminal associates the data of the first application into the PC5 interface quality of service flow according to the PC5 interface packet filter, so that the data of the first application is transmitted in the PC5 interface quality of service flow.

In a possible implementation manner of the first aspect, the generating, by the terminal, a quality of service flow of a PC5 interface corresponding to the first application includes: the terminal receives the configuration information from the policy control network element, and the terminal generates a PC5 interface service quality flow corresponding to the first application according to the configuration information.

In a possible implementation manner of the first aspect, the generating, by the terminal, a quality of service flow of a PC5 interface corresponding to the first application includes: the terminal receives the PC5 interface service quality flow corresponding to the first application from the policy control network element.

In a possible implementation manner of the first aspect, the generating, by the terminal, a quality of service flow of a PC5 interface corresponding to the first application includes: and the terminal generates a PC5 interface service quality flow corresponding to the first application according to the pre-configured parameters.

In a possible implementation manner of the first aspect, the method further includes: and the terminal sends a second parameter to the access management network element, wherein the second parameter is used for representing that the terminal stops transmitting data on the direct connection communication interface. The second parameter is used for the access management network element to instruct the access network device to release the direct connection communication interface resource configured for the terminal.

In a possible implementation manner of the first aspect, before the terminal transmits data through the direct connection communication interface resource, the method further includes: the terminal enters an RRC-inactive state; or the terminal enters a power saving mode in the RRC-active state.

In a possible implementation manner of the first aspect, the method further includes: the terminal receives a first notification message from the access network equipment, wherein the first notification message is used for notifying the terminal to enter an RRC-inactive state. Accordingly, the terminal enters into an RRC-inactive state, including: and the terminal enters an RRC-inactive state according to the first notification message.

In a possible implementation manner of the first aspect, the method further includes: the terminal receives a second notification message from the access network device, wherein the second notification message is used for notifying the terminal to enter a power saving mode, and the state of the terminal is an RRC-activated state. Correspondingly, the terminal enters a power saving mode, including: and the terminal enters a power saving mode according to the first notification message.

In a possible implementation manner of the first aspect, the method further includes: and the terminal sends a fifth message to the access management network element, wherein the fifth message indicates that the terminal supports sending the data of the first application.

In a possible implementation manner of the first aspect, the method may further include: and the terminal sends a third parameter to the access management network element, wherein the third parameter is used for representing that the terminal requests to use a network scheduling mode on the direct connection communication interface.

In a possible implementation manner of the first aspect, the method may further include: the terminal receives second indication information, wherein the second indication information is used for indicating that the terminal is allowed to use the direct connection communication interface resource based on the network scheduling mode to transmit data when the terminal is in an RRC-activated state and adopts a power saving mode. The terminal transmits data through the direct connection communication interface resource, and the method comprises the following steps: and the terminal transmits the data through the direct connection communication interface resource according to the second indication information.

In a possible implementation manner of the first aspect, the method provided in the embodiment of the present application may further include: the terminal receives second indication information, wherein the second indication information is used for indicating that the terminal is allowed to use the direct connection communication interface resource based on the network scheduling mode to transmit data when the terminal is in an RRC-activated state and adopts a power saving mode. The terminal transmits data through the direct connection communication interface resource, and the method comprises the following steps: and the terminal transmits the data through the direct connection communication interface resource according to the second indication information.

In a possible implementation manner of the first aspect, the receiving, by the terminal, the second indication information includes: and the terminal receives the second indication information from the access management network element, or the terminal receives the second indication information from the access network equipment.

In a second aspect, an embodiment of the present application provides a communication method, including: the access network equipment sends resource information to the terminal, the resource information is used for representing direct connection communication interface resources, and the direct connection communication interface resources are used for transmitting data when the terminal is in a Radio Resource Control (RRC) -non-activated state or in an RRC-activated state and adopts a power saving mode.

In a possible implementation manner of the second aspect, the direct connection communication interface resource is a direct connection communication interface resource based on a network scheduling mode.

In a possible implementation manner of the second aspect, the method further includes: the access network equipment receives the preferred scheduling pattern of the terminal from the access management network element. The sending, by the access network device, the resource information to the terminal may include: and the access network equipment sends the resource information to the terminal according to the preferred scheduling mode of the terminal. The priority scheduling mode is a network scheduling mode.

In a possible implementation manner of the second aspect, the method further includes: and the access network equipment receives a request message from a terminal, wherein the request message is used for requesting the direct connection communication interface resource.

In a possible implementation manner of the second aspect, the data is data of a first application, and the preferred scheduling mode is a preferred scheduling mode corresponding to the first application.

In a possible implementation manner of the second aspect, the first application belongs to an allowed service of the terminal.

In a possible implementation manner of the second aspect, the allowed traffic is traffic of the terminal that is allowed to be transmitted through the direct communication interface.

In a possible implementation manner of the second aspect, the method further includes: the access network equipment sends first indication information to the terminal, wherein the first indication information is used for indicating that the terminal is allowed to transmit data of a first application by using a direct connection communication interface resource based on a network scheduling mode in an RRC-inactive state; or, the first indication information is used to indicate that the terminal is allowed to transmit the data of the first application in the RRC-activated state and when the power saving mode is adopted, using the direct connection communication interface resource based on the network scheduling mode.

In a possible implementation manner of the second aspect, the method further includes: the access network equipment sends a first notification message to the terminal, wherein the first notification message is used for notifying the terminal to enter an RRC-non-activated state from an RRC-activated state.

In a possible implementation manner of the second aspect, the method further includes: the access network equipment sends a first notification message to the terminal, wherein the first notification message is used for notifying the terminal to enter a power saving mode, and the terminal is in an RRC-activated state.

In a possible implementation manner of the second aspect, the method further includes: and in the preset time, if the Uu interface between the terminal and the access network equipment has no data transmission, the access network equipment sends a first notification message to the terminal according to the third indication information, wherein the first notification message is used for notifying the terminal to enter an RRC-inactive state from the RRC-active state. The third indication information is used to indicate that, when the Uu interface between the access network device and the terminal has no data for a preset time (for example, 30s), the access network device needs to configure the terminal to enter an RRC-inactive state, and the terminal may transmit data using the direct connection communication interface resource configured for the terminal by the access network device in the RRC-inactive state.

In a possible implementation manner of the second aspect, the method further includes: and within the preset time, if the Uu interface between the terminal and the access network equipment has no data transmission, the access network equipment sends a second notification message to the terminal according to the fourth indication information, wherein the second notification message is used for configuring the RRC connection between the terminal and the access network equipment, and when the terminal maintains the RRC connection between the terminal and the access network equipment, the terminal uses a power saving technology, in other words, the second notification message is used for notifying the terminal to enter a power saving mode in an RRC-activated state. The fourth indication information is used to indicate the access network device, and when the Uu interface between the access network device and the terminal has no data for a preset time (for example, 30s), the access network device needs to maintain an RRC connection with the terminal, and the access network device needs to configure the terminal to use a power saving technology.

In a possible implementation manner of the second aspect, the method further includes: when the terminal stops transmitting data through the direct connection communication interface resource, the access network equipment releases the direct connection communication interface resource; or the access network equipment receives indication information from an access management network element or a terminal, wherein the indication information is used for indicating to release the direct connection communication interface resource or indicating the terminal to stop transmitting data through the direct connection communication interface resource, and the access network equipment releases the direct connection communication interface resource.

In a possible implementation manner of the second aspect, the method further includes: and the access network equipment releases the direct connection communication interface resource configured for the terminal if the access network equipment determines to release the direct connection communication interface resource configured for the terminal.

In a possible implementation manner of the second aspect, the determining, by the access network device, to release the direct connection communication interface resource configured for the terminal includes: and the access network equipment receives indication information from the access management network element, wherein the indication information is used for indicating to release the direct connection communication interface resource configured for the terminal. And the access network equipment determines to release the direct connection communication interface resources configured for the terminal according to the indication information.

In a possible implementation manner of the second aspect, the method further includes: and the access network equipment receives the third indication information or the fourth indication information from the access management network element.

In a possible implementation manner of the second aspect, the method may further include: and the access network equipment determines to allow the terminal to be in an RRC-activated state according to the fourth indication information, and continuously transmits the data of the first application by using the direct connection communication interface resource based on the network scheduling mode when adopting the power saving mode.

In a possible implementation manner of the second aspect, the method may further include: and the access network equipment determines to allow the terminal to continue to transmit the data of the first application by using the direct connection communication interface resource based on the network scheduling mode when the terminal is in the RRC-inactive state according to the third indication information.

In a possible implementation manner of the second aspect, the method further includes: the access network equipment receives a first request message from the terminal, wherein the first request message is used for requesting the terminal to be configured with resources for transmitting the data of the first application on the direct connection communication interface.

In a third aspect, an embodiment of the present application provides a communication method, including: and the access management network element acquires the subscription information of the terminal. And the access management network element sends the identifier of the allowed service of the terminal to the terminal according to the subscription information.

In a possible implementation manner of the third aspect, the sending, by the access management network element, the identifier of the allowed service of the terminal to the terminal according to the subscription information includes: and the access management network element acquires the allowed service identification of the terminal from the subscription information. The access management network element then sends the terminal an identification of the allowed services of the terminal.

In a possible implementation manner of the third aspect, before sending the identifier of the allowed service of the terminal to the terminal, the method further includes: and the access management network element receives the identification of at least one service from the terminal, wherein the identification of at least one service is used for indicating the service requested by the terminal.

In a possible implementation manner of the third aspect, the identifier of the at least one service is used to indicate that the terminal requests a service transmitted on the direct connection communication interface.

In a possible implementation manner of the third aspect, the identifier of at least one service is carried in a first message, where the first message further includes a first parameter, and the first parameter is used to represent that the terminal requests to transmit data using a network scheduling mode on the direct connection communication interface. The above method may further comprise: and the access management network element sends first indication information to the access network equipment or the terminal according to the first parameter, wherein the first indication information is used for indicating that the terminal is allowed to transmit data of a first application by using a direct connection communication interface resource based on a network scheduling mode in an RRC-inactive state, and the first application belongs to at least one service.

In a possible implementation manner of the third aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used for the terminal to transmit data on the direct connection communication interface.

In a possible implementation manner of the third aspect, the method further includes: and the access management network element sends the authorized service quality parameters to the terminal, and the authorized service quality parameters are used for the terminal to transmit data on the direct connection communication interface.

In a possible implementation manner of the third aspect, the method further includes: the access management network element receives a first quality of service parameter from the terminal, wherein the first quality of service parameter is a quality of service parameter used by the terminal for requesting data transmission on the direct connection communication interface.

In a possible implementation manner of the third aspect, the method further includes: and the access management network element receives a second parameter from the terminal, wherein the second parameter is used for representing that the terminal stops transmitting data on the direct connection communication interface. And the access management network element instructs the access network equipment to release the direct connection communication interface resource of the terminal according to the second parameter. Or the second parameter is used for representing that the terminal stops transmitting the data of the first application on the direct connection communication interface.

In a possible implementation manner of the third aspect, the method provided in the embodiment of the present application further includes: and the access management network element sends the preferred scheduling mode of the terminal to the access network equipment. For example, the preferred scheduling mode of the terminal may be a network scheduling mode.

In a possible implementation manner of the third aspect, the allowed service is a service of the terminal that is allowed to be transmitted through the direct communication interface.

In a possible implementation manner of the third aspect, the method further includes: and the access management network element receives a third parameter from the terminal, wherein the third parameter represents that the terminal requests to use a network scheduling mode on the direct connection communication interface. And the access management network element sends second indication information to the access network equipment or the terminal according to the third parameter, wherein the second indication information is used for indicating that the terminal is allowed to transmit data by using the direct connection communication interface resource based on the network scheduling mode in the RRC-inactive state. Or, the second indication information is used to indicate that the terminal is allowed to transmit data using the direct connection communication interface resource based on the network scheduling mode when the terminal is in the RRC-activated state and adopts the power saving mode.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, which may implement one of the communication methods described in any one of the possible implementation manners of the first aspect or the first aspect, and therefore may also achieve the beneficial effects in any one of the possible implementation manners of the first aspect or the first aspect. The communication device may be a terminal, or may be a device that can support the terminal to implement the first aspect or any one of the possible implementation manners of the first aspect. For example, for chips in terminals. The communication device may implement the above method by software, hardware, or by executing corresponding software by hardware.

An example, the communication device, which may be a terminal or a chip applied in a terminal, includes: a communication unit, and a processing unit, wherein the processing unit is used for processing information, and the communication unit is used for transmitting and receiving information. For example, the communication unit is configured to receive resource information from an access network device, where the resource information is used to characterize a direct communication interface resource. And the communication unit is also used for transmitting data through the direct connection communication interface resource, wherein the terminal is in a Radio Resource Control (RRC) -inactive state, or the terminal is in an RRC-active state, and the terminal adopts a power saving mode.

The direct connection communication interface is a communication interface for communicating between two terminals without being relayed by a base station. The direct communication interface communication includes control signaling and data transmission. The direct communication interface may also be referred to as a PC5 interface.

In a possible implementation manner of the fourth aspect, the direct connection communication interface resource is a direct connection communication interface resource based on a network scheduling mode.

In a possible implementation manner of the fourth aspect, the communication unit is configured to, before transmitting the data through the direct communication interface resource, the processing unit is further configured to determine that a network side (e.g., an access management network element) allows the terminal to use the direct communication interface resource based on the network scheduling mode configured by the access network device for the terminal to transmit the data.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to request a direct connection communication interface resource from the access network device.

In a possible implementation manner of the fourth aspect, the data is data of a first application of the terminal, and the direct connection communication interface resource is used for transmitting the data of the first application. The first application is an application that uses the direct communication interface to perform communication, for example, information of a vulnerable road side unit (VRU) is transmitted/broadcast using the direct communication interface.

In a possible implementation manner of the fourth aspect, the first application belongs to an allowed service of the terminal, and the processing unit is further configured to determine an identifier of the allowed service of the terminal.

In a possible implementation manner of the fourth aspect, the processing unit is configured to receive, through the communication unit, an identification of an allowed service of the terminal from the access management network element to determine the identification of the allowed service of the terminal.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to send an identifier of at least one service to the access management network element, where the identifier of the at least one service is used to indicate a service requested by the terminal. At least one of the traffic may be traffic transmitted over a direct communication interface, e.g., V2X traffic. Correspondingly, the identifier of at least one service is used for indicating the terminal to request the service transmitted through the direct connection communication interface. Therefore, the network side can determine the services from which the data requested to be transmitted by the terminal is received, and the application requested to be transmitted by the terminal is authorized.

In a possible implementation manner of the fourth aspect, the identifier of the at least one service is carried in a first message, where the first message further includes a first parameter, and the first parameter is used to represent that the terminal requests to transmit data on the direct connection communication interface using a network scheduling mode. So as to indicate to the access management network element with the first parameter that the terminal requests transmission of data over the direct communication interface using the network scheduling mode. Therefore, the network side can determine that the terminal requires to use the network scheduling mode to transmit data on the communication link of the PC5 interface, that is, the terminal requests to transmit data by using the direct communication interface resource configured by the access network device.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive first indication information, where the first indication information is used to indicate that the terminal is allowed to transmit data of the first application using a direct connection communication interface resource based on a network scheduling mode in an RRC-inactive state; correspondingly, the communication unit is further configured to transmit the data of the first application through the direct connection communication interface resource according to the first indication information. The processing unit determines that the data of the first application can be continuously transmitted on the direct connection communication interface resource acquired based on the network scheduling mode when the terminal is in the RRC-inactive state according to the first indication information. The first indication information may be an independent indication sent by the access network device to the terminal, or may be the direct connection communication interface resource itself configured by the access network device for the terminal. The processing unit may send, according to the independent indication, data of the first application on the direct connection communication interface by using the direct connection communication interface resource through the communication unit when the terminal is in the RRC-inactive state. Or, the processing unit may also send, according to the above-mentioned direct connection communication interface resource sent to the terminal by the access network device, the data of the first application on the direct connection communication interface by using the above-mentioned direct connection communication interface resource through the communication unit when the terminal is in the RRC-inactive state.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive the first indication information from the access management network element or receive the first indication information from the access network device.

In a possible implementation manner of the fourth aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used for the terminal to transmit data on the direct connection communication interface. For example, the first link identification may comprise a first identification being a source address, i.e. the address of the terminal, and a second identification being a destination address, i.e. the address of the device receiving the data of the first application. The first link identification may also be an identification assigned by the terminal to the PC5 communication link for uniquely identifying the terminal PC5 communication link.

In a possible implementation manner of the fourth aspect, the allowed traffic is traffic of the terminal that is allowed to be transmitted through the direct communication interface. It should be understood that the allowed traffic of the terminal may also be other traffic than the traffic allowed to be transmitted over the direct communication interface.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to send, to the access management network element, a first quality of service parameter, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct connection communication interface. So that the access management network element determines an authorized quality of service parameter for the terminal based on the first quality of service parameter.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive an authorized quality of service parameter from the access management network element, where the authorized quality of service parameter is used for the terminal to transmit data on the direct connection communication interface. The authorized quality of service parameter is determined by the first quality of service parameter.

In a possible implementation manner of the fourth aspect, the data is data of a first application, the direct connection communication interface is a PC5 interface, and the processing unit is further configured to generate a PC5 interface quality of service Flow (PC5 QoS Flow) corresponding to the first application. And the processing unit is also used for associating the data of the first application to the PC5 interface quality of service flow. The first application in the embodiment of the present application may be one of the allowed services of the terminal. The PC5 interface quality of service flow includes a PC5 interface packet filter (packet filter), wherein a parameter value in the PC5 interface packet filter (packet filter) is an identifier of the first application. For example, the one parameter may be a PC5 interface quality of service Flow identifier (PFI, PC5 QoS Flow identifier). And the processing unit is used for associating the data of the first application into the PC5 interface quality of service flow according to the PC5 interface packet filter, so that the data of the first application is transmitted in the PC5 interface quality of service flow.

In a possible implementation manner of the fourth aspect, the processing unit is configured to receive, through the communication unit, configuration information from the policy control network element, and the processing unit is configured to generate, according to the configuration information, a PC5 interface quality of service flow corresponding to the first application.

In a possible implementation manner of the fourth aspect, the processing unit is configured to receive, through the communication unit, a PC5 interface quality of service flow corresponding to the first application from the policy control network element.

In a possible implementation manner of the fourth aspect, the processing unit is configured to generate a PC5 interface quality of service flow corresponding to the first application according to a preconfigured parameter.

In a possible implementation manner of the fourth aspect, the communication unit is configured to send a second parameter to the access management network element, where the second parameter is used to represent that the terminal stops transmitting data on the direct connection communication interface. The second parameter is convenient for the access management network element to instruct the access network device to release the direct connection communication interface resource configured for the terminal.

In a possible implementation manner of the fourth aspect, before the communication unit transmits data through the direct connection communication interface resource, the processing unit is further configured to control the terminal to enter an RRC-inactive state. Or the processing unit is further used for controlling the terminal to enter the power saving mode in the RRC-activated state.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive a first notification message from the access network device, where the first notification message is used to notify the terminal to enter an RRC-inactive state. The corresponding processing unit is used for controlling the terminal to enter an RRC-inactive state, and comprises the following steps: and the processing unit is used for controlling the terminal to enter an RRC-inactive state according to the first notification message.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive a first notification message from the access network device, where the first notification message is used to notify the terminal to enter an RRC-activated state and adopt the power saving mode. The corresponding processing unit is used for controlling the terminal to enter an RRC-activated state and adopt a power saving mode, and comprises the following steps: and the processing unit is used for controlling the terminal to enter an RRC-activated state and adopt a power saving mode according to the first notification message.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to send a fifth message to the access management network element, where the fifth message indicates that the terminal supports sending the data of the first application.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to send, by the terminal, a third parameter to the access management network element, where the third parameter is used to represent that the terminal requests to use a network scheduling mode on the direct connection communication interface.

In a possible implementation manner of the fourth aspect, the communication unit is further configured to receive second indication information, where the second indication information is used to indicate that the terminal is allowed to use the direct connection communication interface resource based on the network scheduling mode to transmit data when the terminal is in the RRC-active state and adopts the power saving mode. A communication unit, configured to transmit data through a direct connection communication interface resource, including: and the communication unit is used for transmitting the data through the direct connection communication interface resource according to the second indication information.

In a possible implementation manner of the fourth aspect, the communication unit is configured to receive the second indication information from the access management network element, or the terminal receives the second indication information from the access network device.

In another example, an embodiment of the present application provides a communication device, where the communication device may be a terminal or a chip in the terminal. The communication device may comprise a communication unit. When the communication device is a terminal, the communication device may further include a processing unit and a storage unit. The communication unit may be a transceiver for transceiving data/information and the storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored by the storage unit to cause the terminal to implement the first aspect or a communication method described in any one of the possible implementations of the first aspect. When the communication device is a chip within a terminal, the processing unit may be a processor, and the communication interface may be an input/output interface, a pin or a circuit, etc. The processing unit executes computer program code stored by a memory unit, which may be a memory unit within the chip (e.g. a register, a cache, etc.) or a memory unit external to the chip within the terminal (e.g. a read-only memory, a random access memory, etc.), to cause the terminal to implement a communication method as described in the first aspect or any one of the possible implementations of the first aspect.

Optionally, the processor, the communication interface and the memory are coupled to each other.

In a fifth aspect, embodiments of the present application provide a communication apparatus, which may implement one of the communication methods described in any possible implementation manner of the second aspect or the second aspect, and therefore may also implement beneficial effects in any possible implementation manner of the second aspect or the second aspect. The communication device may be an access network device, or may be a device that can support the access network device to implement the second aspect or any one of the possible implementation manners of the second aspect. For example, to chips in access network equipment. The communication device may implement the above method by software, hardware, or by executing corresponding software by hardware.

An example, an embodiment of the present application provides a communication apparatus, including: a processing unit for executing information or data processing, and a communication unit for performing a transceiving operation of information or receipt. For example, the communication unit is configured to send resource information to the terminal, where the resource information is used to characterize a direct connection communication interface resource, and the direct connection communication interface resource is used for transmitting data when the terminal is in a radio resource control RRC-inactive state, or when the terminal is in an RRC-active state but the terminal adopts a power saving mode.

In a possible implementation manner of the fifth aspect, the direct connection communication interface resource is a direct connection communication interface resource based on a network scheduling mode.

In a possible implementation manner of the fifth aspect, the communication unit is configured to receive the preferred scheduling pattern from a terminal of the access management network element. A communication unit, configured to send resource information to a terminal, including: the processing unit is used for transmitting the resource information to the terminal by using the communication unit according to the preferred scheduling mode of the terminal. The priority scheduling mode is a network scheduling mode.

In a possible implementation manner of the fifth aspect, a communication unit, configured to send resource information to a terminal, includes: and the communication unit is used for receiving a request message from a terminal, wherein the request message is used for requesting the direct connection communication interface resource.

In a possible implementation manner of the fifth aspect, the data is data of a first application, and the preferred scheduling mode is a preferred scheduling mode corresponding to the first application.

In one possible implementation of the fifth aspect, the first application belongs to an allowed service of the terminal.

In a possible implementation manner of the fifth aspect, the allowed traffic is traffic of the terminal that is allowed to be transmitted through the direct communication interface.

In a possible implementation manner of the fifth aspect, the communication unit is configured to send, to the terminal, first indication information, where the first indication information is used to indicate that the terminal is allowed to transmit data of the first application using a direct connection communication interface resource based on a network scheduling mode in an RRC-inactive state. Or, the first indication information is used to indicate that the terminal is allowed to transmit the data of the first application in the RRC-activated state and when the power saving mode is adopted, using the direct connection communication interface resource based on the network scheduling mode.

In a possible implementation manner of the fifth aspect, the communication unit is configured to send a first notification message to the terminal, where the first notification message is used to notify the terminal to enter an RRC-inactive state from an RRC-active state.

In a possible implementation manner of the fifth aspect, the communication unit is configured to send a first notification message to the terminal, where the first notification message is used to notify the terminal to adopt the power saving mode in the RRC-activated state.

In a possible implementation manner of the fifth aspect, within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the processing unit is configured to send, according to the third indication information, a first notification message to the terminal through the communication unit, where the first notification message is used to notify the terminal to enter an RRC-inactive state. The third indication information is used to indicate that, when a Uu interface between the access network device and the terminal has no data for a preset time (for example, 30s), the access network device needs to configure the terminal to enter an RRC-inactive state from an RRC-active state, and the terminal may continue to use the direct connection communication interface resource configured for the terminal by the access network device to transmit data in the RRC-inactive state.

In a possible implementation manner of the fifth aspect, within a preset time, if there is no data transmission on the Uu interface between the terminal and the access network device, the processing unit is configured to send, according to the fourth indication information, a second notification message to the terminal through the communication unit, where the second notification message is used to configure that the terminal maintains an RRC connection with the access network device, and when the terminal maintains the RRC connection with the access network device, the terminal uses a power saving technique, in other words, the second notification message is used to notify the terminal to enter a power saving mode in an RRC-activated state. The fourth indication information is used to indicate the access network device, and when a Uu interface between the access network device and the terminal has no data for a preset time (for example, 30s), the access network device needs to maintain an RRC connection with the terminal, and the access network device needs to configure the terminal to use a power saving technology.

In a possible implementation manner of the fifth aspect, when the terminal stops transmitting data through the direct connection communication interface resource, the processing unit is further configured to release the direct connection communication interface resource, or when the communication unit receives indication information from the access management network element or the terminal, the indication information is used to indicate to release the direct connection communication interface resource or is used to indicate the terminal to stop transmitting data through the direct connection communication interface resource, and the processing unit is configured to release the direct connection communication interface resource.

In a possible implementation manner of the fifth aspect, the communication unit is configured to receive indication information from the access management network element, where the indication information is used to instruct the terminal to stop transmitting data through the direct connection communication interface resource. And the processing unit is used for determining that the terminal stops transmitting data through the direct connection communication interface resource according to the indication information.

In a possible implementation manner of the fifth aspect, the processing unit is configured to determine to release the direct connection communication interface resource configured for the terminal, and then the processing unit releases the direct connection communication interface resource configured for the terminal.

In a possible implementation manner of the fifth aspect, the processing unit, configured to determine to release a direct connection communication interface resource configured for a terminal, includes: and the communication unit is used for receiving indication information from the access management network element, wherein the indication information is used for indicating to release the direct connection communication interface resource configured for the terminal. And the processing unit is used for determining and releasing the direct connection communication interface resources configured for the terminal according to the indication information.

In a possible implementation manner of the fifth aspect, the communication unit is further configured to receive third indication information or fourth indication information from the access management network element.

In a possible implementation manner of the fifth aspect, the processing unit is further configured to determine, according to the fourth indication information, that the terminal is allowed to be in an RRC-activated state, and when the power saving mode is adopted, continue to transmit data of the first application using a direct connection communication interface resource based on a network scheduling mode.

In a possible implementation manner of the fifth aspect, the processing unit is further configured to determine, according to the third indication information, to allow the terminal to continue to transmit the data of the first application using the direct connection communication interface resource based on the network scheduling mode when the terminal is in the RRC-inactive state.

In a possible implementation manner of the fifth aspect, the communication unit is further configured to receive a first request message from the terminal, where the first request message is used to request that a resource for transmitting data of the first application on the direct connection communication interface is configured for the terminal.

In another example, an embodiment of the present application provides a communication apparatus, where the communication apparatus may be an access network device, or may be a chip in the access network device. The communication device may comprise a communication unit. When the communication device is an access network device, the communication device may further include a processing unit and a storage unit. The communication unit may be a transceiver for transceiving data/information and the storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored by the storage unit to cause the access network device to implement a communication method described in the second aspect or any one of the possible implementations of the second aspect. When the communication means is a chip within an access network device, the processing unit may be a processor, and the communication interface may be an input/output interface, pins or circuits, etc. The processing unit executes computer program code stored in a storage unit, which may be a storage unit within the chip (e.g., a register, a buffer, etc.) or a storage unit outside the chip within the access network device (e.g., a read-only memory, a random access memory, etc.), to cause the access network device to implement a communication method described in the second aspect or any one of the possible implementations of the second aspect.

In a sixth aspect, an embodiment of the present application provides a communication apparatus, which may implement one of the communication methods described in any one of the possible implementation manners of the third aspect or the third aspect, and therefore may also achieve beneficial effects in any one of the possible implementation manners of the third aspect or the third aspect. The communication device may be an access management network element, or may be a device that can support the access management network element to implement the third aspect or any one of the possible implementation manners of the third aspect. For example to a chip in an access management network element. The communication device may implement the above method by software, hardware, or by executing corresponding software by hardware.

An example, an embodiment of the present application provides a communication apparatus, including: and the communication unit is used for obtaining the subscription information of the terminal. And the communication unit is also used for sending the identifier of the allowed service of the terminal to the terminal according to the subscription information.

In a possible implementation manner of the sixth aspect, the processing unit is configured to obtain, from the subscription information, an identifier of an allowed service of the terminal. The processing unit then sends the identification of the allowed services of the terminal to the terminal via the communication unit.

In a possible implementation manner of the sixth aspect, before the communication unit is configured to send the identifier of the allowed service of the terminal to the terminal, the communication unit is further configured to receive an identifier of at least one service from the terminal, where the identifier of the at least one service is used to indicate a service requested by the terminal.

In a possible implementation manner of the sixth aspect, the identifier of the at least one service is used to indicate that the terminal requests a service transmitted on the direct connection communication interface.

In a possible implementation manner of the sixth aspect, the identifier of the at least one service is carried in a first message, where the first message further includes a first parameter, and the first parameter is used to represent that the terminal requests to transmit data on the direct connection communication interface in a network scheduling mode. The processing unit is further configured to send first indication information to the access network device or the terminal according to the first parameter, where the first indication information is used to indicate that the terminal is allowed to transmit data of a first application in an RRC-inactive state using a direct connection communication interface resource based on a network scheduling mode, and the first application belongs to at least one service.

In a possible implementation manner of the sixth aspect, the first message further includes a first link identifier, where the first link identifier indicates a communication link used by the terminal to transmit data on the direct connection communication interface.

In a possible implementation manner of the sixth aspect, the communication unit is further configured to send, to the terminal, an authorized quality of service parameter, where the authorized quality of service parameter is used for the terminal to transmit data on the direct connection communication interface.

In a possible implementation manner of the sixth aspect, the communication unit is further configured to receive a first quality of service parameter from the terminal, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct connection communication interface.

In a possible implementation manner of the sixth aspect, the communication unit is further configured to receive a second parameter from the terminal, where the second parameter is used to represent that the terminal stops transmitting data on the direct connection communication interface. And the access management network element instructs the access network equipment to release the direct connection communication interface resource of the terminal according to the second parameter.

In a possible implementation manner of the sixth aspect, the communication unit is further configured to send the preferred scheduling mode of the terminal to an access network device.

In a possible implementation manner of the sixth aspect, the allowed traffic is traffic of the terminal that is allowed to be transmitted through the direct communication interface.

In a possible implementation manner of the sixth aspect, the communication unit is further configured to receive a third parameter from the terminal, where the third parameter indicates that the terminal requests to use a network scheduling mode on the direct connection communication interface. And the access management network element sends second indication information to the access network equipment or the terminal according to the third parameter, wherein the second indication information is used for indicating that the terminal is allowed to use the direct connection communication interface resource based on the network scheduling mode to transmit data in an RRC-inactive state.

In another example, an embodiment of the present application provides a communication apparatus, where the communication apparatus may be an access management network element, or may be a chip in the access management network element. The communication device may comprise a communication unit. When the communication device is an access network device, the communication device may further include a processing unit and a storage unit. The communication unit may be a transceiver for transceiving data/information and the storage unit may be a memory. The memory unit is to store computer program code, the computer program code comprising instructions. The processing unit may be a processor. The processing unit executes the instructions stored in the storage unit to enable the access management network element to implement a communication method described in the third aspect or any one of the possible implementation manners of the third aspect. When the communication device is a chip within an access management network element, the processing unit may be a processor, and the communication interface may be an input/output interface, a pin, a circuit, or the like. The processing unit executes computer program code stored by a storage unit, which may be a storage unit (e.g. register, cache, etc.) within the chip or a storage unit (e.g. read-only memory, random access memory, etc.) located outside the chip within the access management network element, to cause the access management network element to implement a communication method as described in any one of the possible implementations of the third aspect or the third aspect.

In a seventh aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program or an instruction is stored, and when the computer program or the instruction is executed on a computer, the computer is caused to execute a communication method as described in any one of the possible implementation manners of the first aspect to the first aspect.

In an eighth aspect, embodiments of the present application provide a computer-readable storage medium, in which a computer program or instructions are stored, and when the computer program or instructions are run on a computer, the computer is caused to execute a communication method as described in any one of the possible implementation manners of the second aspect to the second aspect.

In a ninth aspect, the present application provides a computer-readable storage medium, in which a computer program or an instruction is stored, and when the computer program or the instruction runs on a computer, the computer is caused to execute a communication method as described in any one of the possible implementation manners of the third aspect to the third aspect.

In a tenth aspect, embodiments of the present application provide a computer program product including instructions that, when executed on a computer, cause the computer to perform the method of communication described in the first aspect or in the various possible implementations of the first aspect.

In an eleventh aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the second aspect or one of the communication methods described in the various possible implementations of the second aspect.

In a twelfth aspect, the present application provides a computer program product comprising instructions which, when run on a computer, cause the computer to perform the second aspect or one of the communication methods described in the various possible implementations of the second aspect.

In a thirteenth aspect, an embodiment of the present application provides a communication system, where the communication system includes any one or more of the following: the communication device described in the fourth aspect and various possible implementations, and the communication device described in the fifth aspect and various possible implementations of the fifth aspect.

In one possible implementation, the communication system may further include: the communication device described in the sixth aspect and various possible implementations of the sixth aspect.

In a fourteenth aspect, an embodiment of the present application provides a communication apparatus, which includes a processor and a storage medium, where the storage medium stores instructions that, when executed by the processor, implement a communication method as described in the first aspect or various possible implementation manners of the first aspect.

In a fifteenth aspect, embodiments of the present application provide a communication device, which includes a processor and a storage medium, where the storage medium stores instructions that, when executed by the processor, implement a communication method as described in the second aspect or various possible implementation manners of the second aspect.

In a sixteenth aspect, embodiments of the present application provide a communication apparatus, which includes a processor and a storage medium, where the storage medium stores instructions that, when executed by the processor, implement a communication method as described in the third aspect or various possible implementation manners of the third aspect.

In a seventeenth aspect, the present application provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, where the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform a communication method as described in any one of any possible implementation manners of the first aspect to the first aspect.

In an eighteenth aspect, the present application provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform a communication method as described in any one of any possible implementation manners of the second aspect to the second aspect.

In a nineteenth aspect, the present application provides a chip or a chip system, where the chip or the chip system includes at least one processor and a communication interface, the communication interface and the at least one processor are interconnected by a line, and the at least one processor is configured to execute a computer program or instructions to perform a communication method described in any one of any possible implementation manners of the third aspect to the third aspect.

The communication interface in the chip may be an input/output interface, a pin, a circuit, or the like.

In one possible implementation, the chip or chip system described above in this application further comprises at least one memory having instructions stored therein. The memory may be a storage unit inside the chip, such as a register, a cache, etc., or may be a storage unit of the chip (e.g., a read-only memory, a random access memory, etc.).

In a twentieth aspect, embodiments of the present application provide a communication apparatus, which includes a processor, coupled to a memory, where instructions are stored, and the processor is configured to execute the instructions to implement the first aspect or one of the communication methods described in the various possible implementations of the first aspect.

In a twenty-first aspect, embodiments of the present application provide a communication apparatus, which includes a processor, coupled to a memory, where instructions are stored, and the processor is configured to execute the instructions to implement the second aspect or one of the communication methods described in the various possible implementation manners of the second aspect.

In a twenty-second aspect, embodiments of the present application provide a communication apparatus, which includes a processor coupled to a memory, where the memory stores instructions, and the processor is configured to execute the instructions to implement the third aspect or a communication method described in various possible implementations of the third aspect.

It is to be understood that the memory described in the twentieth to twenty-second aspects of the embodiments of the present application may be located inside the communication device or located outside the communication device, and the embodiments of the present application are not limited thereto.

For the beneficial effects of the second aspect to the twenty-second aspect and various implementation manners thereof in the present application, reference may be made to beneficial effect analysis in the first aspect and various implementation manners thereof, and details are not described here.

Drawings

Fig. 1 is an architecture diagram of a communication system according to an embodiment of the present application;

fig. 2 is a diagram of a 5G network architecture provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 4 to fig. 13 are schematic diagrams illustrating related interaction flows of a communication method according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of another communication device according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a chip according to an embodiment of the present application.

Detailed Description

In the embodiments of the present application, terms such as "first" and "second" are used to distinguish the same or similar items having substantially the same function and action. For example, the first message and the second message are only used for distinguishing different messages, and the sequence order thereof is not limited. Those skilled in the art will appreciate that the terms "first," "second," and the like do not denote any order or importance, but rather the terms "first," "second," and the like do not denote any order or importance.

It is noted that, in the present application, words such as "exemplary" or "for example" are used to mean exemplary, illustrative, or descriptive. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In this application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c may be single or multiple.

The technical scheme of the application can be applied to various communication systems, such as: a Long Term Evolution (LTE) system, an LTE Frequency Division Duplex (FDD) system, an LTE Time Division Duplex (TDD) system, a Universal Mobile Telecommunications System (UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a Public Land Mobile Network (PLMN) system, a device-to-device (D2D) network system or a machine-to-machine (M2M) network system or a New Radio (NR) system or a 5th generation (5th generation, 5G) network system, a future network system, and the like.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems. In the embodiment of the present application, the method provided is applied to an NR system or a 5G network as an example.

As shown in fig. 1, fig. 1 shows an architecture diagram of a communication system provided by an embodiment of the present application, where the communication system includes: an access network device 10, a terminal 20 communicating with the access network device 10, and a terminal 30 communicating with the terminal 20. Wherein the access network device 10 has a first interface with the terminal 20 and the terminal 20 has a second interface with the terminal 30.

Illustratively, the first interface may be referred to as a Uu interface, and employs a cellular frequency band (e.g., 1.8GHz), and the Uu interface is a communication between a terminal and a network. For example, AS shown in fig. 1, for upload transmission, the terminal 10 may send data a to the access network device 10 through the Uu interface, and then the access network device 10 sends the data a to an Application Server (AS) (e.g., V2X application server) by using the core network. Or for downlink transmission, the AS may send the downlink data to the core network, and then the core network sends the downlink data to the access network device 10, and then the access network device 10 sends the downlink data to the terminal 10 by using the Uu interface.

Illustratively, the second interface may be referred to as a direct communication interface, for example, the direct communication interface is a PC5 interface, and a frequency band dedicated to car networking (e.g., 5.9 GHz). The direct communication interface is an interface used for communication between the terminal and the terminal, for example, the terminal 20 sends data b to the terminal 30 through the direct communication interface. The direct communication interface communication is different from the Uu interface communication in that: the direct communication interface communication does not require network involvement (data b does not pass through the base station). Of course, there may also be a first interface between the terminal 30 and the access network device 10. The direct communication interface is generally used in a vehicle to all (V2X) communication scenario, or a device to device (D2D) scenario in which direct communication between devices is possible.

The names of the first interface and the second interface in the embodiment of the present application are merely examples, and the name of the first interface and the name of the second interface in the embodiment of the present application are not limited.

In this embodiment, communication between the terminal 20 and the terminal 30 is implemented by using a sidelink on a direct communication interface, and in this embodiment, the sidelink on the direct communication interface may be referred to as a PC5 interface communication link or a direct communication interface link. The PC5 interface communication link is a link through which one terminal 20 transmits data to another terminal 30 over a direct communication interface link.

In the embodiment of the present application, a resource used for transmitting data between the terminal 20 and the terminal 30 by using the direct connection communication interface may be referred to as a direct connection communication interface resource.

In one possible implementation, as shown in fig. 1, the communication system may further include: an access management network element 40.

As an example, the core network in fig. 1 may be a 4th generation (4G) core network (e.g., Evolved Packet Core (EPC)) or a 5G core network (5G core, 5GC), or a core network in various future communication systems.

Taking the core network may be a 4G core network as an example, the access network device 10 may be an evolved Node B (eNB) or eNodeB in a 4G system. The terminal 20 or the terminal 30 is a terminal capable of transmitting information to the eNB. The eNB accesses the EPC network through an S1 interface. The network element or entity corresponding to the access management network element 40 may be a Mobility Management Entity (MME).

Taking the core network may be a 5G core network as an example, the access network device 10 may be the next generation node B (gNB) in the NR system, and the terminal 20 or the terminal 30 may be a terminal capable of performing information transmission with the gNB. The gNB accesses the 5GC through the NG interface, and a network element or entity corresponding to the access management network element 40 may be an access and mobility management function (AMF) network element.

Exemplarily, taking a core network as 5GC and AN access network device 10 as a (radio) access network (R) AN as AN example, as shown in fig. 2, in addition to the above-mentioned AMF network elements, the 5GC may further include: a Session Management Function (SMF) network element, or a policy control function (policy control function) network element or an Application Function (AF) network element, a network capability opening function (NEF) network element, a User Data Repository (UDR), a Unified Data Management (UDM) network element, and a User Plane Function (UPF) network element.

Wherein, the terminal communicates with the AMF network element through an N1 interface (N1 for short). The AMF entity communicates with the SMF network element over an N11 interface (abbreviated N11). The SMF network elements communicate with one or more UPF network elements over an N4 interface (abbreviated N4). Any two UPF network elements in the one or more UPF network elements communicate through an N9 interface (abbreviated as N9). The UPF network element communicates with a Data Network (DN) managed by the AF network element through an N6 interface (N6 for short). The terminal accesses the network through (R) AN), and the (R) AN) and the AMF network element communicate through AN N2 interface (N2 for short). The SMF network element communicates with the PCF network element via an N7 interface (abbreviated as N7), and the PCF network element communicates with the AF network element via an N5 interface. The (R) AN) communicates with the UPF network elements over AN N3 interface (abbreviated N3). Any two AMF network elements communicate with each other through an N14 interface (N14 for short). The SMF network elements communicate with the UDM over an N10 interface (abbreviated N10). The AMF network element communicates with the AUSF through an N12 interface (abbreviated as N12). The AUSF network element communicates with the UDM network element via an N13 interface (abbreviated N13). The AMF network element communicates with the UDM network element via an N8 interface (N8 for short).

It should be understood that, in the network architecture shown in fig. 2, the control plane network elements may also interact using a service interface. For example, the AMF network element, the SMF network element, the UDM network element, or the PCF network element use a service interface for interaction. For example, the service interface provided by the AMF network element to the outside may be Namf. The external serving interface provided by the SMF network element may be Nsmf. The external serving interface provided by the UDM network element may be Nudm. The service interface externally provided by the PCF network element may be Npcf. It should be understood that the related description of the names of the various service interfaces can refer to 5G system architecture (5G system architecture) diagram in the prior art, which is not repeated herein.

It should be noted that fig. 2 is only an exemplary illustration of a UPF network element and an SMF network element. Of course, the UPF network element and the SMF network element may include multiple UPF network elements and multiple SMF network elements, for example, the SMF network element 1 and the SMF network element 2 are included, which is not specifically limited in this embodiment of the present application.

It should be noted that, the (R) AN), the AMF network element, the SMF network element, the UDM network element, the UPF network element, the PCF network element, and the like in fig. 2 are only names, and the names do not limit the device itself. In the 5G network and other networks in the future, the network elements or entities corresponding to the (R) AN), the AMF network element, the SMF network element, the UDM network element, the UPF network element, and the PCF network element may also be other names, which is not specifically limited in this embodiment of the present application. For example, the UDM network element may also be replaced by a user home server (HSS) or a User Subscription Database (USD) or a database entity, and the like, which are described herein in a unified manner and will not be described in detail later.

The terminal may be a terminal device including a device providing voice and/or data connectivity to a user, in particular a device providing voice to a user, or a device providing data connectivity to a user, or a device providing voice and data connectivity to a user. For example, may include a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchange voice or data with the RAN, or interact with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle-to-all (V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (internet of things) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (IoT), a remote station (remote station), an access point (access point, AP), a remote terminal (remote), an access terminal (access terminal), a user terminal (user terminal), a user agent (user), or a user equipment (user), etc. For example, mobile telephones (or so-called "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. For example, Personal Communication Service (PCS) phones, cordless phones, Session Initiation Protocol (SIP) phones, Wireless Local Loop (WLL) stations, Personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, Radio Frequency Identification (RFID), sensors, Global Positioning Systems (GPS), laser scanners, and the like.

By way of example and not limitation, in the embodiments of the present application, the terminal may also be a wearable device. Wearable equipment can also be called wearable smart device or intelligent wearable equipment etc. is the general term of using wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.

While the various terminals described above, if located on a vehicle (e.g. placed in or mounted in a vehicle), may be considered to be vehicle-mounted terminal devices, also referred to as on-board units (OBUs), for example.

The method and the device provided by the embodiment of the application can be applied to terminal equipment or network equipment, and the terminal equipment or the network equipment comprises a hardware layer, an operating system layer running on the hardware layer and an application layer running on the operating system layer. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and a memory (also referred to as a main memory). The operating system may be any one or more computer operating systems that implement business processing through processes (processes), such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system. The application layer comprises applications such as a browser, an address list, word processing software, instant messaging software and the like. In the embodiment of the present application, a specific structure of an execution main body of a method for transmitting a signal is not particularly limited in the embodiment of the present application as long as communication can be performed by the method for transmitting a signal according to the embodiment of the present application by running a program in which a code of the method for transmitting a signal of the embodiment of the present application is recorded.

Moreover, various aspects or features of embodiments of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and/or engineering techniques. The term "article of manufacture" as used herein is intended to encompass a computer program accessible from any computer-readable device, carrier, or media. For example, computer-readable storage media may include, but are not limited to, magnetic storage devices (e.g., hard disk, floppy disk, magnetic strips, etc.), optical disks (e.g., Compact Disk (CD), Digital Versatile Disk (DVD), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROM), card, stick, key drive, etc.). In addition, various storage media described herein can represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.

The access network equipment 10, which may also be referred to as a base station, is an entity that may be used in conjunction with a terminal to transmit or receive signals. The method is mainly used for realizing the functions of physical layer function, resource scheduling and management, terminal access control, mobility management and the like. The access network device may be a device supporting wired access or a device supporting wireless access. Illustratively, the access network device may be AN Access Network (AN)/Radio Access Network (RAN) composed of a plurality of 5G-AN/5G-RAN nodes. The 5G-AN/5G-RAN node may be: an Access Point (AP), a base station (nodeB, NB), an enhanced base station (eNB), a next generation base station (NR nodeB, gNB), a Transmission Reception Point (TRP), a Transmission Point (TP), or some other access node, etc.

The access network device 10 in this embodiment may configure a direct connection communication interface resource for the terminal 20, and notify the terminal 20 to enter an RRC-inactive state, or notify the terminal 20 to enter an RRC-active state, and adopt a power saving mode.

The AMF network element mainly accesses NAS signaling (including Session Management (SM) signaling) of the terminal through an N1 interface and accesses signaling of the RAN through an N2 interface, and completes a registration process of a user, forwarding of the SM signaling, and mobility management.

And the SMF network element is used for realizing the procedures of session related establishment, release, update and the like.

The PCF network element is responsible for user policy management, including mobility related policies as well as PDU session related policies, such as QoS policies, charging policies, etc.

And the UDM network element is used for storing the subscription data of the user.

And the AUSF network element is used for realizing the authentication and authorization service function and is responsible for authenticating and authorizing the access of the terminal.

DN, destination of PDU session access of the terminal.

The NEF network element is used for realizing the interaction supporting the 3GPP network and the third party application safety, the NEF network element can safely expose the network capability and events to the third party and is used for enhancing or improving the application service quality, and the 3GPP network can also safely acquire related data from the third party so as to enhance the intelligent decision of the network; and the network element supports retrieving the structured data from the unified database or storing the structured data into the unified database.

And the AF network element is used for realizing interaction with the 3GPP core network to provide services, such as influencing data routing decision, realizing a policy control function or providing some services of a third party to the network side.

And the NRF network element is used for maintaining the real-time information of all network function services in the network. The NRF network element stores information of deployed Network Function (NF) components, such as identifiers and network addresses of the NF components, identifiers of supported network slices, or information of data plane instances, and provides services such as registration and discovery of NF components to other NFs.

A Data Network (DN) refers to an operator network providing a data transmission Service for a terminal, such as an IP Multimedia Service (IMS), the Internet, and the like.

In the embodiment of the application, the terminal may acquire the direct connection communication interface resource through a network scheduling mode or a terminal self-selection mode, so as to send data to other terminals on a PC5 interface communication link.

The so-called network scheduling mode, which may also be referred to as mode 1, refers to: the terminal requests the access network device to configure a direct communication interface resource for the terminal to send data to other terminals on the direct communication interface (e.g., PC5 interface).

The terminal autonomous selection mode, which may also be referred to as mode 2, means: and the terminal selects the direct connection communication interface resource for sending data to other terminals on the direct connection communication interface from the pre-configured resource pool.

In the embodiment of the present application, the data sent by the terminal to other terminals on the direct connection communication interface may refer to: control information (e.g., control information and control signaling on a PC5 interface) or a message of an application (application) layer of V2X (e.g., an Intelligent Transportation System (ITS) or a Wireless Access in Vehicular Access (WAVE) message of a vehicle networking).

As shown in fig. 3, fig. 3 is a schematic structural diagram of a communication device in the embodiment of the present application. The structure of the terminal and the access network device in the embodiment of the present application may refer to the structure of the communication device shown in fig. 3. The communication device comprises a processor 31, a communication line 34 and at least one communication interface (which is only exemplary in fig. 3 to include a transceiver 33).

Optionally, the communication device may also include a memory 32.

The processor 31 may be a general-purpose Central Processing Unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more ics for controlling the execution of programs in accordance with the present disclosure.

The communication link 34 may include a path for transmitting information between the aforementioned components.

A transceiver 33 for information interaction with other devices, such as: any transceiver or the like may be used for communicating with other devices or communication networks, such as ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), etc.

The memory 32 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a Random Access Memory (RAM) or other type of dynamic storage device that can store information and instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor via a communication link 34. The memory may also be integral to the processor.

The memory 32 is used for storing computer-executable instructions for executing the scheme of the application, and is controlled by the processor 31 to execute. The processor 31 is configured to execute computer-executable instructions stored in the memory 32, so as to implement a communication method provided by the following embodiments of the present application.

Optionally, the computer-executable instructions in the embodiments of the present application may also be referred to as application program codes, which are not specifically limited in the embodiments of the present application.

In particular implementations, processor 31 may include one or more CPUs such as CPU0 and CPU1 in fig. 3, for example, as one embodiment.

In particular implementations, the communication device may include multiple processors, such as processor 31 and processor 35 in fig. 3, as one embodiment. Each of these processors may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In the embodiment of the present application, a specific structure of an execution subject of one communication method is not particularly limited as long as communication can be performed by one communication method according to the embodiment of the present application by running a program in which a code of one communication method of the embodiment of the present application is recorded. The following embodiments describe an implementation body of a communication method as a terminal and an access network device as an example.

It should be noted that, for example, the same or similar steps or similar terms, and for example, method embodiments, apparatus embodiments, or system embodiments, may be referred to one another without limitation.

As shown in fig. 4, fig. 4 is an interactive embodiment of a communication method provided in the embodiment of the present application, where the method includes:

step 401, the access network device sends resource information to the terminal.

Accordingly, the terminal receives resource information from the access network device.

The resource information may be used to characterize a direct communication interface resource, or the resource information may be used to characterize a direct communication interface resource used to transmit data of the first application.

In a possible embodiment, the data is data of a first application of the terminal, and the direct connection communication interface resource is used for transmitting the data of the first application.

In the embodiment of the application, the access network device may actively configure the direct connection communication interface resource for the terminal. Of course, the access network device may also configure the direct communication interface resource for the terminal under the request of the terminal. The direct connection communication interface resource may be a resource configured by the access network device for the terminal and dedicated to transmit data of the first application, and at this time, the direct connection communication interface resource may be referred to as a dedicated resource of the first application, that is, the direct connection communication interface resource is only used for transmitting data of the first application. Of course, the direct connection communication interface resource may also be shared by the data of the first application and the data of the other applications, that is, the direct connection communication interface resource is a common resource, that is, the terminal may transmit not only the data of the first application but also the data of the other applications on the direct connection communication interface resource.

For example, the direct connection communication interface resource allocated by the access network device to the terminal in this embodiment of the application is a wireless resource used for data transmission on the direct connection communication interface, for example, a specific timeslot and a specific frequency resource.

For example, the direct connection communication interface resource may be a periodic resource configured for the terminal by the access network device in a semi-static manner.

For example, the direct communication interface resource may be a Semi-Persistent Scheduling (SPS) resource allocated by the access network device to the terminal on the direct communication interface. The access network equipment distributes the semi-persistent scheduling direct connection communication interface resources to the terminal, so that the terminal can periodically use the direct connection communication interface resources to send data on the direct connection communication interface. There is no need to send a request to the access network device to obtain the direct communication interface resources before each communication.

It can be understood that the direct connection communication interface resource in the embodiment of the present application may be configured for the access network device in a dynamic configuration manner or a semi-static configuration manner for the terminal, or the direct connection communication interface resource may be configured for the terminal before the access network device, and when the terminal needs to use the direct connection communication interface resource to transmit data, the access network device may activate the direct connection communication interface resource through a downlink control channel (PDCCH) control signaling, so that the terminal may determine that the activated direct connection communication interface resource is available for transmitting data. The dynamic configuration mode means that the terminal needs to request and obtain the corresponding direct connection communication interface resource from the access network device every time the terminal sends data, and the terminal sends data on the corresponding direct connection communication interface resource. When the terminal has new data to send, the terminal needs to request the direct connection communication interface resource from the access network device again. Semi-static configuration refers to that after a terminal requests a direct connection communication interface resource from an access network device, the access network device authorizes the terminal to periodically use a certain resource, for example, at an interval of 100 milliseconds. The terminal only needs to periodically use the authorized direct connection communication interface resource to send data, and does not need to request the direct connection communication interface resource to the access network equipment every time.

The data in the embodiment of the application can be transmitted on the direct connection communication interface resource acquired by the terminal through the network scheduling mode. Of course, the data in the embodiment of the present application may also be transmitted on the direct connection communication interface resource acquired by the terminal in the terminal autonomous selection mode, but power consumption of the terminal in transmitting the data by using the direct connection communication interface resource acquired in the terminal autonomous selection mode is higher than power consumption of the terminal in transmitting the data on the direct connection communication interface resource acquired in the network scheduling mode.

In the embodiment of the present application, the direct connection communication interface resource may be configured for the terminal by the access network device when the terminal and the access network device maintain an RRC-activated state on the Uu interface. Thus, when the terminal enters the RRC-inactive state from the RRC-active state or the terminal adopts the power saving mode in the RRC-active state, the terminal can still transmit the data of the first application using the direct communication interface resource.

For example, the access network device may be the access network device 10 in fig. 1, and the terminal may be the terminal 20 in fig. 1.

Step 402, the terminal transmits data through the direct connection communication interface resource.

Wherein, in one example, the terminal is in a radio resource control, RRC, inactive state. Or, for another example, the terminal is in an RRC-active state and the terminal adopts a power saving mode, in other words, when the terminal is in the RRC-active state and adopts the power saving mode, the terminal may still transmit data through the direct communication interface resource.

For example, the terminal may employ a long Discontinuous Reception (DRX) technique on the direct communication interface, so that the terminal is in a power saving mode.

On one hand, in the embodiment of the present application, the direct connection communication interface resource may be used only when the terminal is in a radio resource control RRC-inactive state, or is used when the terminal is in an RRC-active state and adopts a power saving mode, in other words, the direct connection communication interface resource is specifically configured for the terminal, and is used for the terminal to transmit data in the radio resource control RRC-inactive state, or is used for the terminal to be in an RRC-active state and the terminal adopts the power saving mode to transmit data.

On the other hand, the direct connection communication interface resource can transmit data when the terminal is in a Radio Resource Control (RRC) -inactive state, or when the terminal is in an RRC-active state and the terminal adopts a power saving mode, and the direct connection communication interface resource can also transmit data when the terminal is in the RRC-active state. For example, when the terminal is in the RRC-activated state, the terminal may transmit data that needs to be transmitted on the direct communication interface using the direct communication interface resource, regardless of whether the terminal employs the power saving mode.

In a possible implementation manner, step 402 in the embodiment of the present application may be implemented by: the terminal transmits data to other terminals by using the direct communication interface resources on the PC5 interface communication links between the terminal and other terminals.

In the embodiment of the application, if the terminal and the access network device keep Uu interface connection or the terminal and the access network device keep RRC connection, the terminal is in an RRC-activated state. When the terminal is in the RRC-activated state, the access network device may configure the direct communication interface resource for the terminal. If the Uu interface connection between the terminal and the access network device is not maintained or the RRC connection between the terminal and the access network device is released, the terminal is in an RRC-inactive state. The description is unified here and will not be repeated later. The power consumption generated by adopting the power saving mode when the terminal is in the RRC-activated state is lower than the power consumption generated by not adopting the power saving mode when the terminal is in the RRC-activated state.

It can be understood that, in this embodiment of the present application, the terminal may enter the RRC-inactive state from the RRC-active state under the configuration of the access network device, or the terminal may enter the power saving mode of the RRC-active state from a normal mode (e.g., a non-power saving mode) of the RRC-active state under the configuration of the access network device, which is not limited in this embodiment of the present application.

The embodiment of the application provides a communication method, in the method, a terminal receives resource information from access network equipment, and the resource information is used for representing resources of a direct connection communication interface, and then when the terminal is in a Radio Resource Control (RRC) -non-activated state or the terminal is in an RRC-activated state and the terminal adopts a power saving mode, data can be transmitted on the resources of the direct connection communication interface. Therefore, for the terminal in the RRC-inactive state, the power consumption caused by the fact that the terminal acquires the direct connection communication interface resource by adopting the terminal self-selection resource mode for data transmission can be avoided. For the terminal in the RRC-activated state and adopting the power saving mode, the power consumption generated when the terminal transmits data on the direct connection communication interface resource can be still lower than the power consumption generated by the terminal in the RRC-activated state and not adopting the power saving mode. Therefore, the method provided by the embodiment of the application can reduce the power consumption of the terminal for transmitting data on the direct connection communication interface.

In a possible embodiment, the method may further include, before step 401: and the access management network element sends the preferred scheduling mode of the terminal to the access network equipment.

Accordingly, the access network device receives the preferred scheduling pattern of the terminal from the access management network element.

As an example, the access management network element may determine the preferred scheduling mode of the terminal from subscription information of the terminal, or the access management network element may determine the preferred scheduling mode of the terminal based on a request of the terminal. Or the access management network element may autonomously determine a preferred scheduling mode of the terminal on the direct communication interface. It can be understood that, in the embodiment of the present application, the preferred scheduling mode of the terminal may refer to a preferred scheduling mode of the terminal on the direct connection communication interface.

As an example, the preferred scheduling mode of the terminal may be a network scheduling mode.

Based on this, the access network device sends resource information to the terminal, including: and the access network equipment sends the resource information to the terminal according to the preferred scheduling mode of the terminal.

As a specific implementation, the sending, by the access network device, the resource information to the terminal according to the preferred scheduling mode of the terminal includes: the access network equipment allocates the direct connection communication interface resource for the terminal in the scheduling mode indicated by the priority scheduling mode, and then the access network equipment sends resource information for representing the direct connection communication interface resource to the terminal.

As an optional example, the preferred scheduling mode is a preferred scheduling mode corresponding to the first application, in other words, the preferred scheduling mode is a preferred scheduling mode of the first application of the terminal on the direct connection communication interface. It should be appreciated that there may be different applications that have different corresponding preferred scheduling modes on the direct communication interface for the same terminal.

In a possible embodiment, the method before step 402 may further include: in a preset time, if data transmission does not exist in a Uu interface between the terminal and the access network equipment, the access network equipment sends a first notification message to the terminal, and correspondingly, the terminal receives the first notification message from the access network equipment.

Wherein the first notification message is used for configuring the terminal to enter an RRC-inactive state. This facilitates the terminal releasing the RRC connection between the terminal and the access network device according to the first notification message to enter the RRC-inactive state from the RRC-active state. However, the terminal may maintain a Connection with the core network while the terminal is in the RRC-inactive state, i.e., the terminal is still in a CM-Connected state (Connection Management).

It can be understood that, when the terminal receives the second notification message, the terminal is in an RRC-active state, in other words, the terminal has an RRC connection with the access network device, and the DRX parameter is configured, so that the terminal obtains an effect of saving power.

In a possible embodiment, the method before step 402 may further include: and in the preset time, if the Uu interface between the terminal and the access network equipment has no data transmission, the access network equipment sends a second notification message to the terminal, and correspondingly, the terminal receives the second notification message from the access network equipment.

Wherein the second notification message is used to instruct the terminal to adopt the power saving mode in the RRC-activated state (or the terminal and the access network device are in a connected state on the Uu interface). Thus, the terminal can use the power saving mode in the RRC-active state after receiving the second notification message.

In a possible embodiment, the method before step 402 may further include: and the terminal determines that the terminal can transmit data by using the direct connection communication interface resource based on the network scheduling mode configured for the terminal by the access network equipment.

In an example, the terminal may determine, according to predefined or preconfigured information, that the terminal is capable of transmitting data using the above-mentioned network scheduling mode-based direct connection communication interface resource configured by the access network device for the terminal.

For another example, the terminal may determine, according to an instruction of the access management network element or the access network device, that the terminal can transmit data using the direct communication interface resource based on the network scheduling mode, which is configured for the terminal by the access network device.

As a specific implementation: the terminal may determine that the terminal is capable of transmitting data of the first application when the terminal is in an RRC-inactive state, using the network scheduling mode-based direct connection communication interface resource configured for the terminal by the access network device.

As another specific implementation: the terminal may determine that the terminal is capable of transmitting data of the first application when the terminal is in an RRC-activated state and in a power saving mode using the network scheduling mode-based direct connection communication interface resource configured for the terminal by the access network device.

Fig. 5 shows another embodiment of the present application, which includes: step 501 to step 512, wherein step 507 refers to step 401 described above, which is not described herein again, and step 509 is a possible implementation manner of step 402.

Wherein, steps 501 to 506, 508, 510, 511 and 512 are optional steps.

Step 501, the terminal sends an identifier of at least one service to the access management network element.

Correspondingly, the access management network element receives the identification of the at least one service from the terminal.

Wherein, the identifier of at least one service is the service requested by the terminal. The at least one service may be a service transmitted over a direct communication interface, e.g., a V2X service. Correspondingly, at least one service is used for indicating the terminal to request the service transmitted through the direct connection communication interface, and the at least one service comprises the first application.

As a possible example, the direct communication interface may be a PC5 interface.

It can be understood that, in this embodiment of the present application, data of at least one service can be transmitted on a direct connection communication interface resource acquired by the terminal in the network scheduling mode, in other words, data of at least one service can also be transmitted on a direct connection communication interface resource configured by the access network device for the terminal based on the network scheduling mode. The at least one service is a service for which the terminal requests data transmission.

As a possible implementation manner, step 501 in this embodiment may be implemented by: the terminal sends a first message to the access management network element, and correspondingly, the access management network element receives the first message from the terminal. The first message carries an identifier of at least one service. For example, the first message may be a Packet Data Unit (PDU) Session (Session) connection Establishment (PDU Session Establishment) message or a service request (service request) message.

Illustratively, the access management network element may be an AMF network element.

As an example, the first message may further carry indication information for indicating that the at least one service is a service requested by the terminal.

Step 502, the access management network element sends the identifier of the allowed service of the terminal to the terminal.

Accordingly, the terminal receives an identification of allowed services from the terminal of the access management network element.

The allowed service is a service in which the access management network element authorizes the terminal to transmit data on the direct connection communication interface, and the allowed service includes a first application, in other words, the first application belongs to the allowed service of the terminal.

Specifically, step 502 may be implemented by: and the access management network element acquires the subscription information of the terminal. And the access management network element sends the identifier of the allowed service of the terminal to the terminal according to the subscription information.

As an example, the sending, by the access management network element, the identifier of the allowed service of the terminal to the terminal according to the subscription information includes: and the access management network element acquires the identifier of the allowed service of the terminal from the subscription information of the terminal. And the access management network element sends the identification of the allowed service of the terminal to the terminal.

In a possible implementation manner, before step 502, the method provided in the embodiment of the present application may further include: the access management network element determines the identity of the allowed services of the terminal.

As a possible implementation manner, the determining, by the access management network element, the identifier of the allowed service may be implemented by: and the access management network element acquires the identifier of the allowed service of the terminal from the subscription information of the terminal. For example, the access management network element may obtain subscription information of the terminal from the UDR network element or the UDM network element, where the subscription information includes an identifier of an allowed service of the terminal.

As another possible implementation manner, the determining, by the access management network element, the allowed service may be implemented by: the access management network element determines the allowed services of the terminal from the at least one service.

It should be understood that, in the embodiment of the present application, the allowed service of the terminal may be all services or part of services in at least one service. For example, at least one service is service 1, service 2, and service 3, and the allowed services may be service 1 and service 2. Thus, the first application may be one or more of service 1 and service 2.

The first application in this embodiment may represent all services in the allowed services, or represent part of the allowed services, for example, one service, which is not limited in this embodiment.

As an example, data of the allowed service in the embodiment of the present application may be transmitted on a direct connection communication interface resource acquired by the terminal in a network scheduling mode. Of course, the data of the allowed service may be transmitted on the direct connection communication interface resource acquired by the terminal in the terminal-autonomous selection mode.

It should be noted that, in the embodiment of the present application, the access management network element may actively send the identifier of the allowed service to the terminal, where step 501 may be omitted, that is, step 501 is an optional step. For example, when the terminal indicates to the access management element that the terminal has the capability to transmit data of the PC5 service over the PC5 interface in a Registration procedure (Registration procedure), the access management element may send an identification of allowed services to the terminal. The data of the PC5 service includes data of an allowed service.

Of course, in this embodiment of the present application, the access management network element may also decide whether to send the identifier of the allowed service to the terminal at the request of the terminal, where step 501 needs to be included before step 502. Specifically, if the access management network element allows the terminal to transmit the data of the allowed service using the direct connection communication interface resource acquired by the network scheduling mode, the access management network element sends the identifier of the allowed service to the terminal. And if the access management network element does not allow the terminal to transmit the data of the allowed service by using the direct connection communication interface resource acquired by the network scheduling mode, the access management network element does not send the identifier of the allowed service to the terminal.

It can be understood that the identifier of the allowed service sent by the access management network element to the terminal is an identifier of a service that the access management network element allows the terminal to transmit data using the direct connection communication interface resource acquired in the network scheduling mode. The identifier of the allowed service sent by the access management network element to the terminal may be an identifier of all services or an identifier of part of services in the identifier of at least one service requested by the terminal, which is not limited in this embodiment of the present application. In other words, the terminal requests transmission of data of service 1 and data of service 2 using the network scheduling mode. The access management network element may allow the terminal to transmit the data of the service 1 and the data of the service 2 in the network scheduling mode, at this time, the access management network element sends the identifier of the service and the identifier of the service 2 to the terminal as the identifiers of the allowed services, and of course, if the access management network element allows the terminal to transmit the data of the service 1 in the network scheduling mode, the access management network element sends the identifier of the service 1 to the terminal as the identifiers of the allowed services.

As a possible implementation manner, the identifier of the allowed service may be determined by the access management network element according to the subscription information of the terminal and the identifier of the at least one service from the terminal, or may be determined by the access management network element according to the subscription information of the terminal and the capability of the terminal. For example, the identifier of the allowed service is an intersection of the identifier of the service in the subscription information and the identifier of the at least one service.

As a possible implementation, step 502 in the embodiment of the present application may be implemented by: and the access management network element sends a sixth message to the terminal. Accordingly, the terminal receives a sixth message from the access management network element. Wherein the sixth message includes the identification of the allowed service. The sixth message is used for indicating that the terminal is allowed to transmit the data of the allowed service by using the direct connection communication interface resource acquired by the network scheduling mode. Of course, the sixth message may also carry indication information x, where the indication information x is used to indicate that the terminal is allowed to transmit the data of the allowed service using the direct communication interface resource acquired by the network scheduling mode. For example, the sixth message may be a service accept message.

Step 503, the terminal sends a first message to the access management network element.

Accordingly, the access management network element receives a first message from the terminal.

The first message comprises a first parameter, wherein the first parameter is used for representing that the terminal requests to transmit data on the direct connection communication interface by using a network scheduling mode, or the first parameter is used for representing that the terminal requests to transmit data of at least one service on the direct connection communication interface by using the network scheduling mode. And the access management network element judges whether the terminal can use the direct connection communication interface resource acquired by the network scheduling mode to transmit data on the direct connection communication interface according to the first parameter and the subscription information of the terminal.

It can be understood that the subscription information of the terminal may include not only the identifier of the allowed service of the terminal, but also information indicating whether the terminal is allowed to transmit data using the direct communication interface resource acquired by the network scheduling mode.

And if the subscription information of the terminal indicates that the terminal is allowed to use the direct connection communication interface resources acquired by the network scheduling mode on the direct connection communication interface to transmit data, the access management network element sends authorization information to the terminal, wherein the authorization information is used for indicating that the terminal is allowed to use the direct connection communication interface resources acquired by the network scheduling mode on the direct connection communication interface to transmit data.

And if the subscription information of the terminal indicates that the terminal is not allowed to use the direct connection communication interface resource acquired by the network scheduling mode to transmit data on the direct connection communication interface, the access management network element does not send authorization information to the terminal. Or, the access management network element sends prohibition indication information to the terminal, where the prohibition indication information is used to indicate that the terminal is prohibited from using the direct connection communication interface resource transmission data acquired by the network scheduling mode on the direct connection communication interface. If the terminal does not receive the authorization information or the terminal receives the prohibition indication information, the terminal does not subsequently transmit data on the direct connection communication interface by using the direct connection communication interface resources acquired through the network scheduling mode.

It should be understood that, in one aspect, the data in the "terminal requests transmission of data using network scheduling mode over the direct communication interface" may refer to "data generally referred to," i.e., the data may be not only data of PC5 service, but also data other than PC5 service. On the other hand, the data in "the terminal requests transmission of data using the network scheduling mode on the direct communication interface" may refer to "the specified data". For example, the specific data may be data of a PC5 service. Meanwhile, the specific data may also be data of other services, for example, data used for sending text messages, audio or video in direct connection communication, where the data may belong to data of allowed services, which is not limited in the embodiment of the present application.

It is to be understood that, if the data in the "request of the terminal to transmit data on the PC5 interface using the network scheduling mode" may refer to "the specified data", if the terminal does not receive the authorization information, or the terminal receives the prohibition indication information, the terminal may not subsequently transmit the "the specified data" on the direct connection communication interface using the direct connection communication interface resources acquired in the network scheduling mode, but the terminal may transmit data other than the "the specified data" on the direct connection communication interface using the direct connection communication interface resources acquired in the network scheduling mode.

Illustratively, the first message may be a service request message. In a possible implementation, the identifier of the at least one service is carried in the first message. It should be understood that if the first parameter and the identifier of the at least one service may be carried in the same message, then the first message may be used to indicate that the terminal requests to transmit data of the at least one service on the direct communication interface using the network scheduling mode. If the first parameter and the identifier of the at least one service are carried in different messages, on one hand, this step 503 may be located before step 501, that is, the terminal requests the access management network element to transmit data on the direct connection communication interface using the network scheduling mode, and the terminal sends the identifier of the at least one service to the access management network element again when the access management network element is allowed to transmit data on the direct connection communication interface using the network scheduling mode. On the other hand, the step 503 may be located after the step 501, that is, the terminal first sends the identifier of at least one service to the access management network element, and when the identifier of the authorized service authorized by the access management network element is obtained, the terminal requests the access management network element to transmit data on the direct connection communication interface using the network scheduling mode.

In a possible implementation, the first message further includes a first link identifier. The first link identifier indicates a communication link for the terminal to transmit data on the direct connection communication interface, or the first link identifier indicates a communication link for the terminal to transmit data of the first application on the direct connection communication interface. For example, the first link identification may be a source address and a destination address. Where the source address is a layer 2 address of the terminal and the destination address is a layer 2 address of a recipient receiving data of the first application (e.g., the layer 2 addresses of the other terminals described above). The access management network element manages a first link (e.g., a communication link for a terminal to transmit data over the direct communication interface) with a first link identification. For example, the access management network element may instruct, by using the first link identifier, the terminal to stop sending data on the first link, or instruct the access network device to stop allocating the direct communication interface resource to the first link, or instruct the access network device to allocate the direct communication interface resource configured for the terminal by the access network device to the first link, where at this time, the terminal may transmit data for the first link on the direct communication interface resource configured for the terminal by the access network device.

Step 504, the terminal sends a second message to the access management network element.

Accordingly, the access management network element receives the second message from the terminal.

The second message includes a first quality of service parameter, where the first quality of service parameter is a quality of service parameter used by the terminal to request data transmission on the direct connection communication interface.

It is to be understood that the second message may include indication information y indicating a quality of service parameter used by the terminal to request data transmission on the direct communication interface.

It can be understood that the first quality of service parameter is a quality of service parameter of a direct communication interface that has not been authorized by the network side.

It will be appreciated that the second message and the first message may be the same message. Specifically, if the first quality of service parameter is sent to the access management network element after the terminal obtains the identifier of the allowed service, the first quality of service parameter is a quality of service parameter used by the terminal to request to transmit data of the allowed service on the direct connection communication interface. For example, the second message may be a PDU session setup request message, or a PDU session modification request message.

The access management network element may send the authorized quality of service parameters to the terminal, which are authorized by the policy control network element, via step 504. In addition, the access management network element may further send, to the terminal or the access network device, indication information used to indicate that the resource allocation mode of the direct connection communication interface resource for transmitting the data of the first application is the network scheduling mode in step 504. In addition, the access management network element may further send, by step 504, indication information to the access network device, where the indication information is used to indicate that the access network device allows the terminal to continue to use the resources of the direct connection communication interface acquired in the network scheduling mode to transmit data on the direct connection communication interface when the terminal is in an RRC-inactive state or an RRC-active state and is in a power saving mode.

Step 505, the access management network element sends a third message to the terminal.

Accordingly, the terminal receives the third message from the access management network element.

The third message includes authorized qos parameters, and the authorized qos parameters are used for the terminal to transmit data on the direct connection communication interface. Or the authorized service quality parameter is the service quality parameter of the network side authorized terminal transmitting data on the direct connection communication interface.

For example, the access management network element determines an authorized qos parameter according to a first qos parameter requested by the terminal and subscription data of the terminal. For example, the authorized quality of service parameter may be a first quality of service parameter.

The quality of service parameter related in the embodiment of the present application includes a resource Type (resource Type), for example, the resource Type may be: guaranteed Bit Rate (GBR), delay critical GBR or Non-guaranteed bit rate (Non-GBR); priority level (priority level); data latency (packet delay budget); a data error rate (packet error rate); computing windows (Averaging windows) for GBR resource types and delay-critical GBR resource types; maximum Data Burst Volume (Maximum Data Burst Volume), for delay-critical GBR resource type; PC5 QoS Flow rate (PC5 Flow Bit Rates); PC5 connection aggregation rate (PC5 Link Aggregated Bit Rates); range (range); resource allocation mode (resource allocation mode).

Step 506, the terminal sends a message for requesting the resources of the direct connection communication interface to the access network device, and correspondingly, the access network device receives the message for requesting the resources of the direct connection communication interface from the terminal.

Specifically, the terminal requests the access network device for the direct connection communication interface resource corresponding to the first application. The direct connection communication interface resource configured by the access network device for the terminal is specific to the first application. Correspondingly, the message for requesting the direct connection communication interface resource carries the identifier of the first application.

As an example, step 506 in the embodiment of the present application may be specifically implemented by the following ways: the terminal sends a first request message to the access network equipment, and correspondingly, the access network equipment receives the first request message from the terminal. The first request message is used for requesting a direct connection communication interface resource. Illustratively, the terminal sends a first request message to the access network device while the terminal is in the RRC-active state. It can be understood that, if the first request message further carries the first link identifier, the direct connection communication interface resource requested by the terminal to the access network device is further associated with the first link identifier, that is, it indicates that the direct connection communication interface resource is used for transmitting data for the first link.

In a possible implementation manner, before step 506, the method provided in the embodiment of the present application may further include: the terminal determines that the terminal can transmit data on the direct connection communication interface by using the direct connection communication interface resource configured for the terminal by the access network device when the terminal is in the RRC-inactive state, or determines that the terminal can transmit data on the direct connection communication interface by using the direct connection communication interface resource configured for the terminal by the access network device when the terminal is in the RRC-active state and in the power saving mode. The fact that the terminal can transmit data on the direct connection communication interface by using the direct connection communication interface resources configured for the terminal by the access network device is equal to the fact that the terminal determines that the terminal can transmit data on the direct connection communication interface by using the network scheduling mode.

It can be understood that, in this embodiment of the present application, when the terminal determines that the terminal is in an RRC-inactive state, or the terminal is in an RRC-active state and is in a power saving mode, and the terminal can use the direct communication interface resource configured by the access network device for the terminal to transmit data, the terminal requests the direct communication interface resource from the access network device, so that when the terminal is in the RRC-inactive state, or the terminal is in an RRC-active state and is in the power saving mode, but the terminal cannot use the direct communication interface resource configured by the access network device for the terminal to transmit data on the direct communication interface, and resources are wasted due to blind application of resources.

In one example, the access network device indicates in an implicit manner that the terminal can transmit data on the direct connection communication interface using the direct connection communication interface resources configured for the terminal by the access network device when the terminal is in the RRC-inactive state, or the access network device indicates in an implicit manner that the terminal can transmit data on the direct connection communication interface using the direct connection communication interface resources configured for the terminal by the access network device when the terminal is in the RRC-active state and in the power saving mode. For example, the resources of the direct connection communication interface configured by the access network device for the terminal are resources in a specific location, and the resources in the specific location can be used for transmitting data of the first application on the direct connection communication interface when the terminal is in an RRC-inactive state, or when the terminal is in an RRC-active state and is in a power saving mode, or transmitting data on the direct connection communication interface. Therefore, if the terminal determines that the resources configured for the terminal by the access network device are resources on a specific position, the terminal can transmit data by using the resources of the direct communication interface configured for the terminal by the access network device when the terminal is in an RRC-inactive state or when the terminal is in an RRC-active state and in a power saving mode.

For another example, the access network device explicitly indicates that when the terminal is in an RRC-inactive state, or the terminal is in an RRC-active state and in a power saving mode, the terminal is capable of transmitting data using a direct connection communication interface resource configured for the terminal by the access network device. For example, the access network device performs step 507. Therefore, the terminal can use the access network equipment to transmit data for the direct connection communication interface resource configured for the terminal when the terminal is in the RRC-inactive state or the terminal is in the RRC-active state and in the power saving mode according to the first indication information.

Step 507, the access network equipment sends the resource information to the terminal.

The description of step 507 may refer to the description of step 401, and is not repeated here.

It should be noted that, if the terminal also carries the first link identifier when requesting the access network device to configure the direct connection communication interface resource for the terminal, the direct connection communication interface resource configured for the terminal by the access network device may also be associated with the first link identifier. The association of the direct communication interface resource and the first link identifier may indicate that a destination of data used for transmission by the direct communication interface resource is a destination of the communication link indicated by the first link identifier.

Step 508, the access network device or the access management network element sends the first indication information to the terminal.

Correspondingly, the terminal receives the first indication information from the access network equipment or the access management network element.

The first indication information is used for indicating that the terminal is allowed to transmit the data of the first application by using the direct connection communication interface resource based on the network scheduling mode when the terminal is in the RRC-inactive state. Or, the first indication information is used to indicate that the terminal is allowed to be in an RRC-activated state and in a power saving mode, and transmit data of the first application using a direct communication interface resource based on a network scheduling mode.

Accordingly, the terminal determines that, when the terminal is in an RRC-inactive state or the terminal is in an RRC-active state and is in a power saving mode, data of the first application can be transmitted on the direct connection communication interface using a direct connection communication interface resource based on a network scheduling mode, including: the terminal determines that when the terminal is in an RRC-inactive state or in the RRC-active state and in a power saving mode according to the first indication information, data of the first application can be transmitted on the direct connection communication interface by using a direct connection communication interface resource based on a network scheduling mode.

Correspondingly, in the case that the terminal receives the first indication information, step 402 in this embodiment of the application may be implemented in the following manner: when the terminal is in an RRC-inactive state, or the terminal is in an RRC-active state and is in a power saving mode, the terminal transmits data of a first application on a direct connection communication interface resource according to the first indication information, including: the terminal determines, according to the first indication information, that when the terminal is in an RRC-inactive state, or when the terminal is in an RRC-active state and in a power saving mode, the terminal transmits data of the first application on the direct connection communication interface, and then the terminal transmits the data of the first application using the direct connection communication interface resource.

In a possible embodiment, the method provided in the embodiment of the present application may further include: the terminal receives permission indication information from the access management network element, wherein the permission indication information is used for indicating that the terminal is permitted to transmit data on the direct connection communication interface, and the permission indication information can facilitate the subsequent terminal to transmit data on the direct connection communication interface.

In a possible embodiment, taking the data related in the embodiment of the present application as the data of the first application and taking the direct connection communication interface as the PC5 interface as an example, the method provided in the embodiment of the present application may further include, before step 508: the terminal generates a PC5 interface quality of service Flow (PC5 QoS Flow) corresponding to the first application. The PC5 interface quality of service flow includes a PC5 interface packet filter. Wherein one parameter value in the PC5 interface packet filter is an identification of the first application. The terminal associates the data of the first application to the PC5 interface quality of service flow. Wherein the PC5 interface packet filter is used to determine data for the first application.

As a specific implementation, the terminal determines the data of the first application according to the packet filter of the PC5 interface, including: the terminal acquires one or more data to be transmitted, compares the application identifier corresponding to the one or more data to be transmitted with the identifier of the first application in the interface packet filter of the PC5, and if the application identifier corresponding to the target data in the one or more data to be transmitted is the same as the identifier of the first application, the terminal determines that the target data is the data of the first application. The association of the data of the first application by the terminal to the PC5 interface quality of service flow may refer to: the terminal uses the PC5 interface quality of service flow to transmit data of the first application on resources allocated to the terminal by the access network device.

In a possible implementation manner, before the terminal generates the PC5 interface qos flow corresponding to the first application, the terminal may obtain a mapping relationship between the first application and the PC5 interface qos flow in the following manner 1 or manner 2:

in the mode 1, the terminal receives the service quality flow or the configuration information of the PC5 interface corresponding to the first application from the policy control network element. Wherein the configuration information is used for generating the PC5 interface quality of service flow corresponding to the first application. And the terminal generates a PC5 interface service quality flow corresponding to the first application according to the configuration information. The parameters of the PC5 interface QoS Flow may be a PC5 interface QoS Flow Identifier (PFI, PC5 QoS Flow Identifier).

For example, the policy control network element may be a PCF network element, and the quality of service flow or configuration information of the PC5 interface corresponding to the first application may be actively sent to the terminal by the policy control network element. Of course, the policy control network element may also send the configuration information or the quality of service flow of the PC5 interface corresponding to the first application to the terminal at the request of the terminal. In the embodiment of the present application, the priority of the PC5 interface quality of service flow or the configuration information corresponding to the first application from the policy control network element is higher than the priority of the PC5 interface quality of service flow pre-configured at the terminal corresponding to the first application.

In the mode 2, the terminal generates the PC5 interface service quality flow corresponding to the first application according to the pre-configured parameters. The terminal has pre-configured in the SIM card or in the terminal's built-in storage the PC5 quality of service parameters that the first application can use. The terminal generates a PC5 interface quality of service flow for the terminal with preset PC5 interface quality of service parameters and writes the identification of the first application into the PC5 interface packet filter of the PC5 interface quality of service flow.

Step 509, when the terminal is in the RRC-inactive state, or the terminal is in the RRC-active state and is in the power saving mode, the terminal transmits the data of the first application on the direct connection communication interface resource configured for the terminal by the access network device according to the first indication information.

When the data transmission of the first application is finished, in order to avoid that the direct connection communication interface resources configured for the terminal by the access network device based on the network scheduling mode are wasted, the access network device can timely release the direct connection communication interface resources configured for the terminal and used for transmitting the data of the first application on the direct connection communication interface. Based on this, in a possible embodiment, as shown in fig. 5, the method provided in the embodiment of the present application may further include, after step 509:

step 510, the terminal sends a fourth message to the access management network element.

Correspondingly, the access management network element receives the fourth message from the terminal.

And the fourth message comprises a second parameter, and the second parameter is used for representing that the terminal stops transmitting data on the direct connection communication interface. Or the second parameter is used to characterize that the terminal has completed transmission of the data of the first application. Or the second parameter is used to characterize that the terminal wishes to stop transmitting data on the direct communication interface. Or the second parameter is used to characterize that the terminal wishes to stop transmitting data of the first application over the direct communication interface.

Illustratively, the fourth message may be a service request message.

Step 511, the access management network element instructs the access network device to release the direct connection communication interface resource of the terminal according to the second parameter.

For example, the access management network element sends release indication information to the access network device, where the release indication information is used to indicate the access network device to release a direct connection communication interface resource of the terminal. Or the release indication information is used for indicating the terminal to stop using the direct connection communication interface resource to transmit the data of the first application on the direct connection communication interface, or the first indication information is used for indicating the terminal to finish the transmission of the data of the first application.

And step 512, when the terminal stops transmitting data through the direct connection communication interface resource, the access network equipment releases the direct connection communication interface resource.

Specifically, step 512 may be implemented by: and the access network equipment releases the direct connection communication interface resources according to the release indication information. Or step 512 may be replaced by: and the terminal completes the transmission of the data of the first application, or the access network equipment needs to release the direct connection communication interface resource configured for the terminal, and the access network equipment releases the direct connection communication interface resource. Specifically, the access network device receives indication information from the access management network element, where the indication information is used to indicate that the terminal has completed transmission of the data of the first application. Specifically, the access network device needs to release the direct connection communication interface resource configured for the terminal, including: and the access network equipment determines that the direct connection communication interface resource configured for the terminal needs to be released according to the indication information from the access management network element.

As a possible implementation, in this embodiment of the application, after the access network device releases the direct communication interface resource configured for the terminal, the access network device may further send a third notification message to the terminal, where the third notification message is used to indicate that the direct communication interface resource configured for the terminal is released, so that the terminal determines that the direct communication interface resource is released according to the third notification message.

In a possible implementation manner, the method provided in the embodiment of the present application may further include: and the terminal sends the third parameter to the access management network element, and correspondingly, the access management network element receives the third parameter from the terminal. The third parameter is used for representing that the terminal requests to use a network scheduling mode on the direct connection communication interface. And the third parameter is convenient for the access management network element to determine that the scheduling mode of the resource of the terminal for transmitting data on the direct connection communication interface is a network scheduling mode.

In a possible implementation manner, the method provided in the embodiment of the present application may further include: and the terminal receives second indication information, wherein the second indication information is used for indicating that the terminal is allowed to be in an RRC-activated state and transmit data by using the direct connection communication interface resource based on the network scheduling mode when adopting the power saving mode. The terminal transmits data through the direct connection communication interface resource, and the method comprises the following steps: and the terminal transmits the data through the direct connection communication interface resource according to the second indication information.

As an example, the terminal transmits the data through the direct connection communication interface resource according to the second indication information, including: and the terminal determines that the access management network element allows the terminal to transmit data by using the direct connection communication interface resource based on the network scheduling mode when the terminal is in the RRC-activated state and adopts the power saving mode according to the second indication information, and then the terminal transmits the data through the direct connection communication interface resource.

It should be noted that, if the second parameter is used to characterize that the terminal wishes to stop transmitting data on the direct connection communication interface or the second parameter is used to characterize that the terminal stops transmitting data on the direct connection communication interface, the access management network element may instruct the access network device to release all resources of the direct connection communication interface for the terminal. If the second parameter is used to characterize that the terminal wishes to stop transmitting the data of the first application on the direct connection communication interface or the second parameter is used to characterize that the terminal stops transmitting the data of the first application on the direct connection communication interface, the access management network element may instruct the access network device to release the direct connection communication interface resource configured for the first application, but other data transmission on the direct connection communication interface is not stopped.

As shown in fig. 6, a terminal is taken as a UE, AN access network device is taken as AN (R) AN device, AN access management network element is taken as AN AMF network element, and a direct communication interface is taken as a PC5 interface as AN example, which describes in detail a communication method provided in AN embodiment of the present application, where the method includes:

step 601, the UE sends a registration request message to the AMF network element through the (R) AN equipment.

Accordingly, the AMF network element receives a registration request message from the UE.

The registration request message may carry a first mode indicator (indicator). The registration request message is for requesting registration of the UE to the core network.

Wherein the first mode indication indicates that the UE requests transmission of data of PC5 traffic in a network scheduling mode on the PC5 interface, or the first mode indication indicates that the UE has the capability of transmitting data of PC5 traffic on the PC5 interface.

For example, the PC5 service may be a VRU service, and the PC5 service may also be other services that use a PC5 interface for communication, such as a service for direct communication between terminals.

Optionally, the registration request message may also carry an identifier of the UE.

After step 601, the UE may perform other steps in the registration procedure with other network elements in the core network.

Step 602, the AMF network element sends a registration request message to the UDM network element.

Accordingly, the UDM network element receives the registration request message from the AMF network element.

Step 603, the UDM network element sends a registration response (registration response) message to the AMF network element.

Accordingly, the AMF network element receives the registration response message from the UDM network element.

The registration response message may carry subscription information of the UE, where the subscription information of the UE includes one or more of the following information: first capability (capability) information, and authorization indication information. Wherein the first capability information indicates that the UE has a capability of transmitting data of the PC5 service on the PC5 interface. The grant indication information is used to indicate that the UE is allowed to transmit data of the PC5 service on the PC5 interface using the direct communication interface resources acquired by the network scheduling mode.

Step 604, the AMF network element selects a PCF network element that provides service for the UE.

Step 605, performing Access and mobility policy (AM policy) policy connection Establishment/Modification (association Establishment/Modification) procedure between the AMF network element and the PCF network element.

After step 605, the UE performs other steps in the registration procedure with other network elements in the core network.

Step 606, the AMF network element sends a registration accept (registration accept) message to the UE, and correspondingly, the UE receives the registration accept message from the AMF network element.

Wherein, the registration acceptance message includes authorization indication information.

The UE may determine, through the authorization indication information, that the UE is capable of transmitting data of the PC5 service on the PC5 interface using the direct communication interface resource acquired by the network scheduling mode.

The purpose of the embodiment shown in fig. 6 is: the UE determines that the UE can transmit data of the PC5 service on the PC5 interface by using the direct communication interface resources acquired by the network scheduling mode through the registration process.

The registration request message in the embodiment shown in fig. 6 may correspond to the first message in the above embodiment, and the first mode indication may correspond to the first parameter or the third parameter.

As shown in fig. 7, fig. 7 illustrates AN example in which a terminal is a UE, AN access network device is AN (R) AN device, AN access management network element is AN AMF network element, a PC5 service includes at least one service, and a direct connection communication interface is a PC5 interface, which describes a method for transmitting data of a PC5 service by using a low power consumption mode for the UE, and the method includes:

step 701, the UE enters a mode of transmitting data of the PC5 service.

As a specific implementation, step 701 may be implemented by: the upper layer invokes an AT command (AT command) with the V2X layer to trigger the UE to enter a mode of transmitting data of PC5 traffic. For example, the upper layer may be an application layer of the UE, and the upper layer and the V2X layer may be located inside the UE.

Step 702, the UE sends a service request message to the AMF network element through the (R) AN device.

Accordingly, the AMF network element receives a service request message from the terminal through the (R) AN apparatus.

The service request message carries a request of the PC5 service, an identifier of at least one service, and a quality of service parameter (requested PC5 QoS parameters)1 of the UE requesting data transmission on the PC5 interface, but does not carry a PDU Session list (list of PDU Session).

Wherein, the request of the PC5 service is used to indicate that the UE requests to transmit data of the PC5 service on the PC5 interface. The service request message does not carry list of PDU Session to indicate that the terminal is not to send the service request message because there is data to send over Uu.

For example, the requested PC5 QoS parameters may contain one or more of the following parameters:

-PC 55G quality of service parameter identity (QoS Identifier) (PQI);

resource Type (resource Type), for example, the resource Type may be: guaranteed Bit Rate (GBR), delay critical guaranteed rate (delay-GBR), or Non-guaranteed bit rate (Non-GBR);

-priority level (priority level);

-a data delay (packet delay budget);

-a data error rate (packet error rate);

-computing windows (Averaging windows) for GBR resource types and delay-critical GBR resource types;

-Maximum Data Burst Volume (Maximum Data Burst Volume) for delay-critical GBR resource type;

-PC5 QoS Flow rate (PC5 Flow Bit Rates);

-PC5 Link Aggregated Bit Rates (PC5 Link Aggregated Bit Rates);

-a range (range);

-resource allocation mode (resource allocation mode).

It should be understood that the resource allocation pattern included in the requested PC5 QoS parameters is a resource allocation pattern requested by the terminal, for example, the resource allocation pattern may be a network scheduling pattern.

Step 703, the AMF network element sends an AM policy request (policy request) message to the PCF network element.

Correspondingly, the PCF network element receives the AM strategy request message from the AMF network element.

The AM policy request message carries at least one service identifier and requested PC5 QoS parameters 1.

Step 704, the PCF network element sends an AM policy response (policy response) message to the AMF network element.

Correspondingly, the AMF network element receives the AM strategy response message from the PCF network element.

The AM policy response message carries QoS parameters (authorized PC5 QoS parameters)2 authorized by the PCF network element to be used by the UE on the PC5 interface, an identifier of allowed services, and an allocation mode (allocation mode). For example, the preferred scheduling mode may be a network scheduling mode, i.e., mode 1(mode 1). And the network side authorizes the UE to transmit the data of the allowed service on the PC5 interface by using the direct communication interface resource acquired based on the network scheduling mode.

It will be appreciated that the preferred scheduling mode may also be a mode selected autonomously by the terminal, i.e. mode 2(mode 2). The terminal transmits the data of the allowed service on the PC5 interface through the self-selected direct connection communication interface resource.

The preferred scheduling mode indicates that the quality of service flow of the PC5 interface corresponding to the allowed traffic needs to be transmitted using a low power consumption manner.

The PC5 interface quality of service flow includes a PC5 interface packet filter (packet filter). The (PC5 QoS Flow identifier, PFI) value of one PC5 interface quality of service Flow in the PC5 interface packet filter is an identification of allowed traffic.

The low power consumption mode for transmitting data includes (but is not limited to) using SPS resource allocation mode on the PC5 interface (i.e., the UE uses SPS resources configured for the UE by the (R) AN apparatus on the PC5 interface), or randomly selecting direct communication interface resources by the terminal in a specific resource pool to transmit data.

Step 705, the AMF network element sends AN N2(N2 request) message to the (R) AN device, and accordingly, the (R) AN device receives AN N2message from the AMF network element.

The N2message includes authorized PC5 QoS parameters2, a preferred scheduling mode, an identifier of allowed service, and a service accept (service accept) message. Wherein, the service accept message includes the identification of the allowed service. The authorized PC5 QoS parameters2 include the identity of the allowed traffic and the preferred scheduling mode. For example, the preferred scheduling mode is a network scheduling mode. Wherein the identifier of the allowed service is the identifier of the service authorizing the UE to transmit data on the PC5 interface. The allowed traffic belongs to all or part of at least one traffic. The authorized PC5 QoS parameters2, preferred scheduling mode, identification of allowed traffic may be carried in the context of the UE.

It should be understood that after (R) AN equipment receives authorized PC5 QoS parameters2, the terminal can be allocated direct communication interface resources for transmitting data of allowed services according to authorized PC5 QoS parameters 2. For example, authorized PC5 QoS parameters2 indicates that the guaranteed bandwidth for the AMF network element to authorize the terminal to transmit the data of the allowed service is 5M, and then (R) the bandwidth of the direct communication interface resource allocated by the AN device to the terminal for transmitting the data of the allowed service is at least 5M, so as to guarantee reliable transmission of the data of the allowed service. Of course, when the (R) AN device allocates the direct communication interface resource for the terminal to transmit the data of the allowed service, not only the authorized PC5 QoS parameters2 may be referred to, but also the remaining resource at the (R) AN device or the direct communication interface resource required by other terminals may be referred to, which is not limited in this embodiment of the present application.

Optionally, the AMF network element may further send a mode indication 1 (corresponding to the fourth indication information) to the (R) AN apparatus, where the mode indication 1 is used to indicate that, when the (R) AN apparatus and the UE have no data in AN air interface (e.g., Uu interface), the (R) AN apparatus and the UE maintain Uu interface connection (i.e., the (R) AN apparatus and the UE maintain RRC connection therebetween), and the UE needs to maintain Uu interface connection with the (R) AN apparatus in a power saving mode.

As a possible implementation manner, the mode indication 1 (corresponding to the fourth indication information) is used to indicate that, if the (R) AN apparatus and the UE have no data transmission over AN air interface within a preset time duration, the (R) AN apparatus needs to maintain Uu interface connection with the UE, and when the (R) AN apparatus and the UE maintain Uu interface connection, the UE needs to adopt a power saving mode. It can be understood that, after the preset time period is exceeded, if the (R) AN apparatus and the UE still have no data transmission over the air interface, the (R) AN apparatus may release the Uu interface connection with the UE, that is, the (R) AN apparatus releases the RRC connection with the UE, so that the UE is in the RRC-inactive state.

Step 706, (R) the AN apparatus transmits RRC connection reconfiguration (connection reconfiguration) information to the UE.

The RRC connection reconfiguration message includes configuration (configuration) of a sidelink radio bearer (SL RB) and a service acceptance message.

The service acceptance message includes the identifier of the allowed service and authorized PC5 QoS parameters 2.

It is understood that the configuration (configuration) of the sidelink radio bearer (SL RB) is used to configure a radio bearer for the UE to transmit data of the allowed service on the PC5 interface. The RRC connection reconfiguration information may be actively transmitted to the UE by the (R) AN device, or the (R) AN device may transmit the RRC connection reconfiguration information to the UE upon a request of the UE. For example, if the (R) AN equipment acquires the N2message from the AMF network element, it actively sends the RRC connection reconfiguration information to the UE.

The step 706 in the embodiment of the present application aims at: the UE receives the identification of allowed services and authorized PC5 QoS parameters2 from the AMF network element through (R) AN equipment.

Step 707, the PCF network element updates the UE policy.

Wherein the policy may contain the identity of the allowed traffic and the PC5 interface quality of service flow corresponding to the identity of the allowed traffic.

The PC5 interface quality of service flow may include, among other things, a PC5 interface filter, the PC5 interface filter being used to determine the data of the allowed traffic. Specifically, the PC5 interface filter may include an identification of allowed services. Taking the example that the allowed service includes application 1, the PC5 interface filter may include an identification of application 1.

Step 708, the PCF network element sends the updated policy of the UE to the UE.

Correspondingly, the UE receives the updated UE strategy from the PCF network element.

As an example, the PCF network element may actively send the updated policy of the UE to the UE. As another example, the PCF network element may send the UE an updated UE policy based on the UE's request. For example, a PCF network element receives a UE policy update (UE policy update) request message from a UE. The UE policy update request message is for requesting a policy of the UE. And the PCF network element sends a UE strategy updating response message to the UE according to the UE strategy updating request message. The UE policy update response message includes the updated policy of the UE.

The following steps 709 to 711 take the example that the allowed service includes the application 1.

Step 709, the UE requests direct communication interface resources for transmitting application 1 data on the PC5 interface to the (R) AN device.

In one possible implementation, step 709 may be replaced by: and the UE requests direct communication interface resources for transmitting the data of the application 1 on the PC5 interface from the (R) AN equipment according to the identification of the application 1, the source layer 2 identification and the destination layer 2 identification. The UE provides the source layer 2 identification, the destination layer 2 identification to the (R) AN device to facilitate the (R) AN device to determine AN address of a sender of the data of application 1, and AN address of a recipient of the data of application 1.

Step 710, (R) the AN apparatus allocates SPS resources for the UE according to the preferred scheduling mode.

Wherein the SPS resources may be used to transmit application 1 data over the PC5 interface. It is understood that SPS resources are one type of direct communication interface resources.

And step 711, the UE transmits the data of the application 1 on the PC5 interface by using the SPS resources according to the quality of service flow of the PC5 interface.

As a possible implementation manner, step 711 in this embodiment may be implemented by: the UE determines the data of the application 1 according to a PC5 interface packet filter (packet filter), and then the UE sends the data of the application 1 on a PC5 interface communication link by using the direct communication interface resource. For example, the UE may determine the data of application 1 according to a PC5 interface packet filter (packet filter) by: and the UE determines that the identifier of the application corresponding to the data to be sent is the same as the identifier of the application 1 carried in the PC5 interface packet filter, and then the UE determines that the data to be sent is the data of the application 1.

If the other PC5 interface packet filters in the UE are not consistent with the PC5 interface packet filters provided by the PCF network element for the UE, the priority of the PC5 interface packet filter provided by the PCF network element for the UE is higher than that of the other PC5 interface packet filters in the UE. In other words, the PC5 interface packet filter in step 711 may be, on one hand, other PC5 interface packet filters that are possessed by the UE, and may also be a PC5 interface packet filter that is provided by the PCF network element for the UE. When the two are not consistent, the PC5 interface packet filter in step 711 provides the PC5 interface packet filter for the UE by the PCF network element.

It should be noted that, when the UE sends data of application 1 on the PC5 interface using the direct communication interface resource configured by the (R) AN apparatus for the UE, the (R) AN apparatus configures the UE to maintain the Uu interface connection when there is no data transmission over the air interface (e.g., Uu interface) according to the mode indication 1. Specifically, the UE maintains the RRC-Connected state on the Uu interface, and needs to use a power saving technique, for example, Long DRX. It is understood that when the UE maintains the RRC-Connected state on the Uu interface and employs the power saving technique, the (R) AN apparatus may indicate to the UE that the UE may continue to transmit data of application 1 using the above-mentioned resources configured for the UE by the (R) AN apparatus.

The contents of the measurement by the terminal in the RRC connected state are more than those of the measurement by the terminal in the Idle (Idle) state, and the terminal in the RRC connected state consumes more power than the terminal in the Idle state.

In the embodiment shown in fig. 7, if there is no data transmission between the UE and the (R) AN device over the Uu interface, but the UE also needs to perform data transmission over the PC5 interface, in this case: although the UE may maintain the RRC connection with the (R) AN device, the UE needs to adopt a power saving mode, and at this time, the UE can continue to use the direct communication interface resource configured for the UE by the (R) AN device to transmit data of the allowed service, so as to reduce power consumption of the UE. On the other hand, in the scheme, when data transmission needs to be performed between the subsequent UE and the (R) AN device over the Uu interface, the UE does not need to re-establish RRC connection with the (R) AN device through the random access procedure to transmit data. And for downlink transmission, the (R) AN equipment can omit the process of paging the terminal again.

The Service Request message (Service Request message) in the embodiment shown in fig. 7 corresponds to the first message in the above-described embodiment. The identifier of the application 1 corresponds to the identifier of the first application in the above embodiment, the quality of service parameter (requested PC5 QoS parameters)1 of the terminal requesting data transmission on the PC5 interface corresponds to the first quality of service parameter in the above embodiment, and the source layer 2 identifier (source L2 ID) and the destination layer 2 identifier (destination L2 ID) correspond to the first link identifier. authorized PC5 QoS parameters2 correspond to authorized quality of service parameters in the embodiments described above, but reference is made to the description herein for the following embodiments, wherever relevant names are referred to.

In the embodiment shown in fig. 7, the process of the UE acquiring authorized PC5 qospark meters2 and PC5 interface packet filters in the service request flow is described, and when the UE needs to transmit data of application 1 on the PC5 interface, when the UE does not have data transmission with (R) AN device on the Uu interface, the UE maintains RRC-Connected state with (R) AN device on the Uu interface, and adopts a power saving technique, at which time the UE can continue to use (R) AN device to transmit data of application 1 on the PC5 interface for direct communication interface resources configured for the UE based on the network scheduling mode.

Referring to fig. 8, fig. 8 shows another communication method of the embodiment of the present application, which is different from the embodiment shown in fig. 7 in that: the UE obtains authorized PC5 QoS parameters2 and PC5 interface packet filters from the PCF network element in a Packet Data Unit (PDU) session (session) flow. The method comprises the following steps:

step 801, the UE sends a PDU session establishment request (PDU session establishment request) message to the AMF network element.

Correspondingly, the AMF network element receives a PDU session establishment request message from the UE.

The PDU session establishment request message may include: a Data Network Name (DNN), an indication of the PC5 service, an identification of at least one service, and a quality of service parameter (requested PC5 QoS parameters)1 requested by the UE to transmit data over the PC5 interface. Wherein, the service quality parameter 1 includes at least one service identifier. The qos parameter 1 includes an identifier of at least one service, which indicates that the qos parameter 1 is a qos parameter used when data of at least one service is transmitted. Wherein the indication of PC5 traffic is used to indicate that the UE has the capability to transport PC5 traffic over the PC5 interface.

Step 802, the AMF network element selects the SMF network element for establishing the PDU session for the UE.

Step 803, the AMF network element triggers a PDU session setup session management context request (Nsmf _ PDU session _ CreateSMContext request) service operation to the SMF network element. Accordingly, the SMF network element receives an Nsmf _ PDU session _ CreateSMContext request service operation from the AMF network element.

The Nsmf _ PDU session _ CreateSMContext request service includes an indication of a PC5 service, an identifier of at least one service, and a requested PC5 QoS parameters 1.

It is understood that the UE continues to perform other procedures in the PDU session setup procedure with other network elements in the core network after step 803.

Step 804, the SMF network element sends a session management Policy Association Modification (SM Policy Association Modification) request message to the PCF network element.

Correspondingly, the PCF network element receives the SM Policy Association Modification request message from the SMF network element.

The SM Policy Association Modification request message may carry an identifier of at least one service and requested PC5 QoS parameters 1.

Step 805, the PCF network element sends a session management Policy Association Modification (SM Policy Association Modification) response message to the SMF network element.

Correspondingly, the SMF network element receives the SM Policy Association Modification response message from the PCF network element. The SM Policy Association Modification response message may include: authorized PC5 QoS parameters 2.

The preferred scheduling mode corresponding to the authorized PC5 QoS parameters2, including the authorized PC5 QoS parameters2, is the network scheduling mode.

It is understood that the UE continues to perform other procedures in the PDU session setup procedure with other network elements in the core network after step 805.

Step 806, the SMF network element sends N1 container (container) and N2 container to the AMF network element.

Accordingly, the AMF network element receives the N1 container and the N2 container from the SMF network element.

The N1 container may include, among other things, the identity of allowed services, authorized PC5 QoS parameters2, and PC5 interface packet filters. The PC5 interface packet filter may include, among other things, an identification of allowed traffic.

Among them, the N2 container may include authorized PC5 QoS parameters2 and the allowed service identification.

Wherein the allowed service is an application in at least one service.

Step 807, the AMF network element sends the N2 container to the (R) AN device.

Step 808, the AMF network element sends an N1 container to the UE.

Accordingly, the UE receives the N1 container from the AMF network element. This facilitates the UE to know in time the authorized PC5 QoS parameters2 and the PC5 interface packet filter that the UE is authorized by the PCF network element to transmit the data of the allowed traffic on the PC5 interface.

In the embodiment shown in fig. 8, the UE may obtain, through the PDU session establishment procedure, an identifier of a permitted service authorized by the network side, and determine that data of the permitted service may be transmitted using a direct communication interface resource obtained by the UE in a network scheduling mode. In addition, the UE may also obtain authorized PC5 QoS parameters2 and PC5 interface packet filters through the PDU session establishment procedure, so that the authorized PC5 QoS parameters2 and PC5 interface packet filters may be directly adopted when the subsequent UE needs to transmit data of the allowed service.

It should be understood that the embodiment shown in fig. 8 takes a PDU session setup procedure as an example, and the PDU session setup procedure may also be replaced by a PDU session modification/update procedure. The PDU session setup request message may correspond to the first message. In addition, in the embodiment shown in fig. 8, the UE acquires authorized PC5 QoS parameters2 in the PDU session setup procedure.

Referring to fig. 9, another communication method provided in an embodiment of the present application includes:

step 901, the UE sends a service request message to the AMF network element through the (R) AN device, and correspondingly, the AMF network element receives the service request message from the UE through the (R) AN device.

Wherein, the service request message includes the identification of the PDU session, the identification of at least one service and the request of the PC5 service. Wherein, the request of the PC5 service is used to indicate that the UE requests to transmit data of the PC5 service on the PC5 interface.

Step 902, the AMF network element triggers a PDU session Update session management context request (Nsmf _ PDU _ Update SM context request) service operation to the SMF network element. Correspondingly, the SMF network element receives a PDU session update session management context request service from the AMF network element. The PDU session update session management context request service operation includes at least one service identifier and a request of the PC5 service.

Step 903, the SMF network element triggers a PDU session Update session management context response (Nsmf _ PDU _ Update SM context response) service operation to the AMF network element, and correspondingly, the AMF network element receives a serviced PDU session Update session management context response service operation from the SMF network element.

The PDU session update session management context response service operation includes the identifier of the allowed service, the authorized PC5 QoS parameters2, the authorized PC5 preferred scheduling mode corresponding to the QoS parameters2, and the second mode indication. The preferred scheduling mode corresponding to the authorized PC5 QoS parameters2 is the network scheduling mode. The allowed service may be a service of the at least one service. Wherein the second mode indication is for indicating (R) that the AN device is still able to transmit data of the PC5 service using the direct communication interface resource acquired in the network scheduling mode when the terminal is in the RRC-inactive state.

The PDU session update session management context request service operation in fig. 9 may correspond to the first message described above.

Step 904, the AMF network element sends the N2 container to the (R) AN device, and the corresponding (R) AN device receives the N2 container from the AMF network element.

The N2 container includes preferred scheduling modes corresponding to authorized PC5 QoS parameters2, authorized PC5 QoS parameters2 and a second mode indication. The AN equipment can be configured to transmit the data of the PC5 service by using the direct communication interface resource acquired by the network scheduling mode when the terminal is in the RRC-inactive state through the second mode indication (R).

Step 905, the SMF network element sends the N1 container to the UE, and accordingly, the UE receives the N1 container from the SMF network element.

The N1 container includes the allowed service identifier, authorized PC5 QoS parameters2 and PC5 interface packet filter.

The following steps 906 to 911 take the example that the allowed service includes the application 1, in other words, the following steps 906 to 911 take the example that the UE transmits the data of the application 1 on the PC5 interface by using the direct communication interface resource.

Step 906, the UE requests the (R) AN device for direct communication interface resources for transmitting data of application 1.

It is understood that steps 906 to 911 are optional steps, and steps 906 to 911 may be performed when the UE needs to transmit data of the allowed service.

Step 907, (R) the AN device configures a direct communication interface resource for the UE to transmit data of application 1 based on the preferred scheduling mode of the UE, and accordingly, the UE receives the direct communication interface resource for transmitting data of application 1 from the (R) AN device.

And 908, the UE transmits the data of the applied 1 on the PC5 interface by using the direct communication interface resource configured for the UE by the (R) AN equipment according to the PC5 interface packet filter.

Step 909, the (R) AN apparatus sends a first notification message to the UE according to the second mode indication, and accordingly, the UE receives the first notification message from the (R) AN apparatus. Wherein the first notification message is used for instructing the UE to enter the RRC-inactive state from the RRC-active state.

It is understood that, before step 909, the method further includes: (R) the AN device determines that there is no data transmission with the UE over the Uu interface.

Step 910, the (R) AN apparatus sends, to the UE, first indication information, where the first indication information is used to indicate that, when the UE enters the RRC-inactive state, the UE is allowed to continue to use the direct communication interface resource configured for the UE by the (R) AN apparatus to send data of the application 1 on the PC5 interface.

Step 911, the UE continues to use the direct communication interface resource configured for the UE by the (R) AN apparatus to send the data of the application 1 on the PC5 interface when the UE enters the RRC-inactive state according to the first indication information.

The Service Request message (Service Request message) in the embodiments shown in fig. 7 and 8 and fig. 9 corresponds to the first message in the above-described embodiments. The identification of the application 1 corresponds to the identification of the first application in the above embodiment, and the quality of service parameter (requested PC5 QoS parameters)1 of the terminal requesting data transmission on the PC5 interface corresponds to the first quality of service parameter in the above embodiment. Source layer 2 identification (source L2 ID) and destination layer 2 identification (destination L2 ID) correspond to the first link identification. authorized PC5 QoS parameters2 correspond to authorized quality of service parameters in the above embodiments.

Referring to fig. 10, another communication method provided in the embodiment of the present application includes:

step 1001, UE sends registration request message to AMF network element through (R) AN.

Accordingly, the AMF network element receives a registration request message from the UE through the (R) AN.

Wherein the registration request message may include requested PC5 QoS parameters1, an identification of at least one service.

Optionally, the registration request message may further include a PC5 communication identification (communication ID), wherein the PC5 communication ID is used to characterize the PC5 communication link of the UE transmitting data of at least one service on the PC5 interface. For example, the PC5 communication link may be composed of a source address and a destination address. The source address is the source layer 2 identity, e.g., the layer 2 address (source L2 ID) of the UE, and the destination address is the destination layer 2 identity (destination L2 ID), e.g., the layer 2 address of the UE receiving the data of the PC5 service.

Optionally, the registration request message may further include a first mode indication indicating that the UE requests to transmit data of the PC5 service on the PC5 interface in a network scheduling mode, or the first mode indication indicating that the UE has the capability of transmitting data of the PC5 service on the PC5 interface.

Step 1002, the AMF network element triggers a terminal policy control Update (Npcf _ UEPolicyControl _ Update) message to the PCF network element.

Correspondingly, the PCF network element receives the served terminal strategy control update message from the AMF network element.

Wherein, the terminal policy control update message carries the requested PC5 QoS parameters1 requested by the UE in step 1001, and the identifier of at least one service. Optionally, the terminal policy control update message may further include the first mode indication and a PC5 communication identifier.

Step 1003, the PCF network element updates the policy of the UE.

The policy of the UE includes a PC5 communication ID for transmitting data of the allowed service, an identifier of the allowed service, and a PC5 interface quality of service flow corresponding to the identifier of the allowed service. The PC5 interface quality of service flow includes a PC5 interface Packet filter set. The PC5 interface Packet filter set includes the identity of the allowed service.

Step 1004, the PCF network element sends N1N2 communication message transmission service to the AMF network element

(Namf_Communication_N1N2Message Transfer)。

Accordingly, the AMF network element receives the Namf _ Communication _ N1N2Message Transfer from the PCF network element. Wherein, the Namf _ Communication _ N1N2Message Transfer includes the PC5 interface Packet filter set. Optionally, the naf _ Communication _ N1N2Message Transfer may further include a PC5 Communication identifier.

Step 1005, the AMF network element transmits the UE policy to the UE.

Accordingly, the UE receives the UE's policy from the AMF network element.

The policy of the UE may include a PC5 communication ID for transmitting data of the allowed service, an identifier of the allowed service, and a quality of service flow of the PC5 interface corresponding to the identifier of the allowed service.

The embodiment shown in fig. 10 mainly describes that the UE acquires the PC5 interface Packet filter set and the PC5 communication ID authorized by the network side from the PCF network element through the registration procedure, and the identifier of the allowed service.

Referring to fig. 11, another communication method provided in the embodiment of the present application includes:

step 1101, the UE sends a Service Request message (Service Request message) to the AMF network element.

Accordingly, the AMF network element receives a service request message from the UE.

The service request message may be used for the UE to request data of the at least one service to be transmitted on the PC5 interface, and further, the service request message may be used for the UE to request data of the at least one service to be transmitted on the PC5 interface in a network scheduled mode (network scheduled mode).

Illustratively, the service request message may carry an identifier of at least one service. The service may refer to the related description above.

Optionally, the service request message also carries a PC5 communication ID and/or an Operation (Operation) indication.

Wherein the PC5 communication ID is used to characterize the PC5 communication link of the UE transmitting at least one traffic over the PC5 interface. For example, the PC5 communication link may be composed of a source address and a destination address. The source address is a layer 2 address of the UE, and the destination address is a layer 2 address of the UE receiving the data of the at least one service.

Wherein the operation indication is used for characterizing the activated PC5 service. By PC5 traffic is meant: traffic that the UE transmits over the PC5 interface. The PC5 service may include at least one of the services described above. The PC5 service in the embodiment of the present application may also be referred to as a VRU service.

Illustratively, the Operation indication is set to "active", which means that the UE requests to transmit data of the at least one service on the PC5 interface in the network scheduling mode. Or Operation set to "active

(activate) "indicating that the UE requests activation of data for transmission of the at least one service on the PC5 interface in the network scheduling mode. Here, "activate" may be represented by a preset value, for example, a preset binary "1".

As a possible implementation, step 1101 may be implemented by: the UE transmits a service request message to the (R) AN apparatus. Correspondingly, the (R) AN device sends a NAS message to the AMF network element, where the NAS message includes the service request message.

Step 1102, when the AMF network element does not have the context corresponding to the PC5 communication ID of the UE, the AMF network element sends message 1 to the PCF network element.

Correspondingly, the PCF network element receives message 1 from the AMF network element.

Wherein, the message 1 may carry the PC5 communication ID and the identifier of at least one service. For example, message 1 may be an AM policy request (AM policy request).

The context corresponding to the PC5 communication ID may refer to: the context of the PC5 communication link associated with the PC5 communication ID, the context of the PC5 communication link including at least authorized PC5 QoS parameters of traffic transmitted over the PC5 communication link, and the like.

It should be noted that steps 1102-1103 are optional steps and may not be performed.

Step 1103, the PCF network element sends a response message 1 to the AMF network element.

Correspondingly, the AMF network element receives the response message 1 from the PCF network element.

The response message 1 may include, among other things, Authorized PC5 QoS parameters (Authorized PC5 QoS parameters), an identification of allowed traffic, and a preferred scheduling mode for PC5 traffic.

The allowed service may be all or part of at least one service, or the identifier of the allowed service may be obtained by the AMF network element from subscription information of the UE. For example, the preferred scheduling mode for PC5 traffic may be a network scheduling mode. For example, the preferred scheduling mode of PC5 traffic may be carried in RRC Inactive Assistance Information (RRC Inactive Assistance Information).

Assuming that the preferred scheduling mode of the PC5 service is the network scheduling mode, the AMF network element may determine that the network side authorizes the UE to transmit data of the allowed service on the PC5 interface using the network scheduling mode through the response message 1 in step 1103.

Step 1104, the AMF network element sends AN N2message to the (R) AN device.

Accordingly, the (R) AN device receives the N2message from the AMF network element. The N2message may include, among other things, the PC5 communication ID, the preferred scheduling mode for PC5 traffic, the identification of allowed traffic, and Authorized PC5 QoS parameters.

The preferred scheduling mode of the PC5 service may be carried in RRC Inactive Assistance Information (RRC Inactive Assistance Information), or the preferred scheduling mode of the PC5 service may be included in Authorized PC5 QoS parameters.

The PC5 communication ID, preferred scheduling mode for PC5 traffic, identification of allowed traffic, and Authorized PC5 QoS parameters described above may be carried in the context of the UE.

Taking the preferred scheduling mode of the PC5 service as the network scheduling mode as AN example, the preferred scheduling mode of the PC5 service may be used to indicate to the (R) AN device, when the Uu between the (R) AN device and the UE has no data for a preset time (e.g., 30s), (R) the AN device needs to configure the UE to enter AN RRC-inactive (inactive) state, and when the UE is in the RRC-inactive (inactive) state, the UE may continue to use the direct communication interface resource acquired in the network scheduling mode on the PC5 interface to send data of the allowed service.

It is understood that the (R) AN device may determine, through the preferred scheduling mode of the PC5 service, that when the UE is in AN RRC-inactive (inactive) state, the UE can continue to transmit data of allowed service on the PC5 interface using the direct communication interface resources acquired in the network scheduling mode.

In a possible implementation manner, the N2message may further include a PC5 traffic mode indication, where the PC5 traffic mode indication indicates that, in a case where there is no data transmission between the UE and the (R) AN device on the Uu interface, the (R) AN device configures the terminal to enter AN RRC-inactive state from AN RRC-active (active) state.

In a possible implementation manner, the N2message may further include a service acceptance message (service access message) sent by the AMF network element to the UE, where the service acceptance message (service access message) includes an identifier of the allowed service. Optionally, the service acceptance message may further include a quality of service flow of the PC5 interface provided by the PCF network element.

Of course, the identifier of the allowed service may also be carried in AN N1 container sent by the AMF network element to the UE through the (R) AN equipment.

Step 1105, (R) the AN device sends AN RRC connection reconfiguration message to the UE.

Accordingly, the UE receives AN RRC connection reconfiguration message from the (R) AN device. The RRC connection reconfiguration message includes an identifier of an allowed service sent to the UE by the AMF network element. Optionally, the RRC connection reconfiguration message includes a PC5 interface service quality flow provided by the PCF network element sent by the AMF network element to the UE.

Taking the allowed service including the first application as an example, the method provided in the embodiment of the present application may further include: step 1106.

Step 1106, the UE determines the PC5 interface quality of service flow for the first application.

Specifically, step 1106 may be implemented as follows: and the UE determines the PC5 interface service quality flow of the first application according to the PC5 interface service quality flow provided by the PCF network element, or the UE determines the PC5 interface service quality flow of the first application according to the pre-configured parameters.

It is understood that after the Service Request procedure, if the UE intends to transmit the data of the first application, the method may further include steps 1107 to 1112:

step 1107, the UE requests a direct communication interface resource for transmitting data of the first application to the (R) AN device.

Step 1108, (R) the AN device configures a direct connection communication interface resource for the terminal for transmitting the data of the first application.

Accordingly, the UE receives direct communication interface resources from the (R) AN device for transmitting data of the first application.

Step 1109, the UE transmits the data of the first application on the PC5 interface using the direct communication interface resource configured for the UE by the (R) AN apparatus according to the PC5 interface quality of service flow of the first application.

Specifically, one parameter in the PC5 interface quality of service flow is AN identifier of a first application, and if the UE determines that AN application identifier corresponding to data to be transmitted is the same as the identifier of the first application, the data to be transmitted is determined to be the data of the first application, and then the data of the first application is transmitted on the PC5 interface using a direct communication interface resource configured for the UE by using (R) AN apparatus.

It is understood that step 1109 is a process of the UE transmitting data of the first application on the direct communication interface resource when the UE is in an RRC-activated (active) state. Of course, this step 1109 may be omitted.

Step 1110, (R) the AN apparatus sends a first notification message to the UE according to the PC5 traffic mode indication.

The first notification message is used for notifying the UE to enter an RRC-inactive state from an RRC-active (active) state.

For example, in case there is no data transmission between the UE and the (R) AN device over the Uu interface, (R) AN device configures the terminal to enter AN RRC-inactive state from AN RRC-active (active) state in which the RRC connection between the UE and the (R) AN device is released.

Step 1111, (R) the AN apparatus transmits first indication information to the UE.

Accordingly, the UE receives first indication information from the (R) AN apparatus. The first indication information is used for indicating that when the UE is in AN RRC-inactive state, the UE can continue to use the direct communication interface resource configured for the UE by the (R) AN apparatus to transmit data of the allowed service on the PC5 interface.

And step 1112, when the UE is in the RRC-inactive state, the UE transmits the data of the first application on the PC5 interface by using the direct communication interface resource configured for the UE by the (R) AN equipment according to the first indication information.

It should be noted that step 1111 is an optional step, and accordingly, step 1112 may be replaced with: and when the UE is in AN RRC-inactive state, the UE transmits the data of the first application on the PC5 interface by using the direct communication interface resources configured for the UE by the (R) AN equipment.

It will be appreciated that in the embodiment shown in FIG. 11, Authorized PC5 QoS parameters2 correspond to the Authorized quality of service parameters described above. The service acceptance message may correspond to the fourth message described above. The service request message may correspond to the first message in the above-described embodiment.

Referring to fig. 12, another communication method provided in the embodiment of the present application includes:

step 1201, the UE sends a Service Request message to the AMF network element.

The service request message may be used for the UE to request data of the PC5 service to be uploaded on the PC5 interface, and further, the service request message may be used for the UE to request data of the PC5 service to be transmitted on the PC5 interface in a network scheduled mode (network scheduled mode).

Illustratively, the service request message may carry an identifier and/or an Operation (Operation) indication of the PC5 service. The service may refer to the related description above. PC5 traffic may also be referred to as VRU traffic.

Wherein the operation indication is used for characterizing that the UE requests to activate the PC5 service or that the UE requests to activate to transmit the PC5 service in a network scheduling mode.

Illustratively, the Operation indication is set to "active", which means that the UE requests to transmit data of the above-mentioned PC5 service on the PC5 interface in the network scheduling mode. Or Operation is set to "active", which means that the UE requests to activate the transmission of the data of the above-mentioned PC5 service on the PC5 interface in the network scheduling mode. Here, "activate" may be represented by a preset value, for example, a preset binary "1".

As a possible implementation, step 1201 may be implemented as follows: the UE transmits a service request message to the (R) AN apparatus. Correspondingly, the (R) AN device sends a NAS message to the AMF network element, where the NAS message includes the service request message.

It is noted that other processes may be included between steps 1201 and 1202. For example, the UE intends to transmit uplink data at the same time to (R) AN equipment.

Step 1202, the AMF network element sends AN N2message to the (R) AN device.

Accordingly, the (R) AN device receives the N2message from the AMF network element. The N2message may include a Preferred scheduling Mode (The Preferred Scheduled Mode for PC5 Service) of The PC5 Service and an identifier of an allowed Service of The UE. The allowed traffic belongs to traffic in PC5 traffic.

In a possible implementation manner, the N2message may further include a service accept message (service accept message) sent by the AMF network element to the UE. Wherein, the service acceptance message includes the identification of the allowed service of the UE.

It will be appreciated that the (R) AN apparatus can determine the preferred scheduling mode for the allowed traffic of the UE through the N2 message.

Step 1203, (R) the AN device sends AN RRC connection reconfiguration message to the UE.

Accordingly, the UE receives AN RRC connection reconfiguration message from the (R) AN device.

Wherein, the RRC connection reconfiguration message includes a service acceptance message.

The steps 1201 to 1203 may be referred to as a service request procedure (service request procedure), and after the service request procedure, the method provided in this embodiment may further include: the UE requests a radio resource for transmitting data of the above-described PC5 service, and the UE transmits data of the PC5 service in a power-saving manner. For example, the UE transmitting the data of the PC5 service in a power-saving manner may transmit the data of the PC5 service for the direct communication interface resource acquired by the UE in the network scheduling mode. For example, steps 1107 to 1112 in FIG. 11.

Fig. 13 illustrates another embodiment provided by embodiments of the present application, which includes:

step 1301, the UE sends a service request (service request) message to the (R) AN device.

Accordingly, (R) the AN apparatus receives a service request message from the UE.

The service request message is used to indicate that the UE wishes to stop transmitting data on the PC5 interface or to indicate that the UE stops transmitting data using the network scheduling mode on the PC5 interface. Or, if the service request message also carries the identifier of the first application, the service request message is used to indicate that the UE wishes to stop transmitting the data of the first application on the PC5 interface. The first application belongs to allowed traffic of the UE.

Wherein, the service request message contains an Operation indication. Operation indication set to "deactivate

(deactivating) "indicating that the UE wishes to stop transmitting data on the PC5 interface. Or Operation set to "deactivate" means that the UE requests to deactivate to transmit data on the PC5 interface in the network scheduling mode. Or Operation set to "deactivate" indicates that the UE wishes to stop transmitting data of the first application over the PC5 interface. Here, "deactivate" may be represented by a preset value, for example, a preset binary "0".

Step 1302, (R) the AN device sends a NAS message to the AMF network element.

Accordingly, the AMF network element receives the NAS message from the (R) AN apparatus.

Wherein, the NAS message comprises a service request message.

Step 1303, the AMF network element sends AN N2message to the (R) AN device.

Accordingly, the (R) AN receives the N2message from the AMF network element.

As an example, the preferred scheduling mode for PC5 traffic is not included in the N2 message. If the preferred scheduling mode for the PC5 service is not included in the N2message, then, via the N2message, the (R) AN apparatus may determine to release the direct communication interface resources configured for the PC5 service. For example, the N2message includes RRC Inactive connection Assistance Information (RRC Inactive Assistance Information) that does not include the preferred scheduling mode of the PC5 service.

As AN example, the N2message may carry assistance information, which is used for the (R) AN apparatus to determine to release the direct communication interface resources configured for the PC5 service.

Step 1304, (R) the AN device releases the direct communication interface resources configured for the UE for transmitting data of the PC5 service according to the N2 message.

It should be noted that, if the UE wishes to stop transmitting the data of the first application on the PC5 interface in step 1301, the N2message sent by the AMF network element to the (R) AN device may also carry the identifier of the first application, so that the (R) AN device may release the direct communication interface resources configured for the UE to transmit the data of the first application, in other words, the (R) AN device may not release the direct communication interface resources configured for the data of the non-first application in the PC5 service.

It is to be understood that, in this embodiment, after the Service Request procedure (procedure), when the (R) AN apparatus determines that there is no data transmission on the Uu interface for a preset time with the UE, the (R) AN apparatus configures the UE to enter RRC _ IDLE and CM _ IDLE.

The Service Request message in the embodiment shown in fig. 13 corresponds to the fourth message in the above-described embodiment.

The terms used in the embodiments described in fig. 4 to 13 of the present application refer to the steps of the embodiments described above.

The above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, such as the access network device, the terminal, the access management network element, etc., includes a corresponding hardware structure and/or software module for performing each function in order to implement the above functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the access network device, the terminal, and the access management network element may perform the division of the functional units according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated in one processing unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

The method of the embodiment of the present application is described above with reference to fig. 4 to 13, and a communication apparatus provided in the embodiment of the present application for performing the method is described below. Those skilled in the art will understand that the method and apparatus may be combined and referred to each other, and the communication apparatus provided in the embodiments of the present application may perform the steps performed by the access network device, the terminal, and the access management network element in the foregoing communication method.

In the case of an integrated unit, fig. 14 shows a communication apparatus as referred to in the above embodiment, which may include: a communication unit 102 and a processing unit 101.

In one example, the communication device is a terminal or a chip applied to the terminal. In this case, the communication unit 102 is configured to support the communication apparatus to perform the receiving action performed by the terminal in step 401 of fig. 4 of the above-described embodiment. A processing unit 101, configured to enable the communication apparatus to perform the processing action performed by the terminal in step 402 of fig. 4. The communication unit 102 is further configured to support the communication apparatus to perform the sending action performed by the terminal in step 402 in the foregoing embodiment.

In a possible embodiment, the communication unit 102 is further configured to support the communication device to perform the sending action performed by the terminal in step 501, step 503, step 504, step 506, step 509, and step 510 in the foregoing embodiments, and the communication unit 102 is further configured to support the communication device to perform the receiving action performed by the terminal in step 502, step 505, and step 508 in the foregoing embodiments.

As another example, the communication device is an access network device, or a chip applied in the access network device. In this case, the communication unit 102 is configured to support the communication device to perform the action of sending performed by the access network device in step 401 in the foregoing embodiment. A processing unit 101, configured to enable the communication apparatus to execute the resource determined to allocate the terminal for transmitting the data of the first application in the above embodiment.

In a possible implementation manner, the communication unit 102 is further configured to support the communication device to perform the sending action performed by the access network device in step 508 in the foregoing embodiment. The communication unit 102 is further configured to enable the communication device to perform the receiving action performed by the access network equipment in step 511 in the foregoing embodiments. A processing unit 101, configured to enable the communication device to perform the processing action performed by the access network equipment in step 512 in the foregoing embodiment.

In another example, the communication device is an access management network element or a chip applied in the access management network element. In this case, the communication unit 102 is configured to enable the communication device to perform the sending action performed by the access management network element in step 502 of fig. 5 of the above-mentioned embodiment. The processing unit 101 is further configured to enable the communication apparatus to perform the above-described actions of determining the identity of one or more applications.

In a possible embodiment, the communication unit 102 is further configured to support the communication device to perform the receiving actions performed by the access management network element in step 503, step 504, and step 510 in the foregoing embodiments. The communication unit 102 is further configured to support the communication device to perform the sending actions performed by the access management network element in step 505 and step 511 in the foregoing embodiments.

In the case of an integrated unit, fig. 15 shows a schematic diagram of a possible logical structure of the communication apparatus according to the above embodiment. The communication device includes: a processing module 112 and a communication module 113. The processing module 112 is used for controlling and managing the operation of the communication device, for example, the processing module 112 is used for executing steps of information/data processing on the communication device. The communication module 113 is used to support the communication device to perform the steps of information/data transmission or reception.

In a possible embodiment, the communication device may further comprise a storage module 111 for storing program codes and data available to the communication device.

In one example, the communication device is a terminal or a chip applied to the terminal. In this case, the communication module 113 is used to support the communication device to perform the receiving action performed by the terminal in step 401 of fig. 4 of the above-described embodiment. A processing module 112, configured to enable the communication apparatus to perform the processing action performed by the terminal in step 402 of fig. 4. The communication module 113 is further configured to support the communication device to perform the sending action performed by the terminal in step 402 in the foregoing embodiment.

In a possible embodiment, the communication module 113 is further configured to support the communication device to perform the sending action performed by the terminal in step 501, step 503, step 504, step 506, step 509, and step 510 in the foregoing embodiments, and the communication module 113 is further configured to support the communication device to perform the receiving action performed by the terminal in step 502, step 505, and step 508 in the foregoing embodiments.

As another example, the communication device is an access network device, or a chip applied in the access network device. In this case, the communication module 113 is configured to support the communication device to perform the action of sending performed by the access network device in step 401 in the foregoing embodiment. A processing module 112, configured to enable the communication apparatus to execute the resource determined to allocate the terminal for transmitting the data of the first application in the above embodiment.

In a possible implementation manner, the communication module 113 is further configured to enable the communication device to perform the sending action performed by the access network equipment in step 508 in the foregoing embodiment. The communication module 113 is further configured to enable the communication device to perform the receiving action performed by the access network equipment in step 511 in the foregoing embodiments. A processing module 112, configured to enable the communication device to perform the processing action performed by the access network equipment in step 512 of the foregoing embodiment.

In another example, the communication device is an access management network element or a chip applied in the access management network element. In this case, the communication module 113 is used to support the communication device to perform the sending action performed by the access management network element in step 502 of fig. 5 of the above-mentioned embodiment. The processing module 112 is further configured to enable the communication device to perform the above-described actions of determining the identity of the authorized service.

In a possible embodiment, the communication module 113 is further configured to support the communication device to perform the receiving actions performed by the access management network element in step 503, step 504, and step 510 in the foregoing embodiments. The communication module 113 is further configured to support the communication device to perform the sending action performed by the access management network element in step 505 and step 511 in the foregoing embodiments.

The processing module 112 may be a processor or controller, such as a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., a combination of one or more microprocessors, a digital signal processor and a microprocessor, or the like. The communication module 113 may be a transceiver, a transceiving circuit or a communication interface, etc. The storage module 111 may be a memory.

When the processing module 112 is the processor 31 or the processor 35, the communication module 113 is the transceiver 33, and the storage module 111 is the memory 32, the communication device according to the present application may be the communication device shown in fig. 3.

It should be noted that, if the communication device shown in fig. 3 is an access management network element, the transceiver 33 in fig. 3 may be replaced with a communication interface.

In one example, the communication device is a terminal or a chip applied in the terminal. In this case, the transceiver 33 is used to support the communication device to perform the receiving action performed by the terminal in step 401 of fig. 4 of the above-described embodiment. Processor 31 and/or processor 35 to enable the communication device to perform the processing actions performed by the terminal in step 402 of fig. 4. The transceiver 33 is further configured to support the communication device to perform the sending action performed by the terminal in step 402 in the foregoing embodiment.

In a possible embodiment, the transceiver 33 is further configured to support the communication device to perform the sending actions performed by the terminal in steps 501, 503, 504, 506, 509, and 510 in the foregoing embodiments, and the transceiver 33 is further configured to support the communication device to perform the receiving actions performed by the terminal in steps 502, 505, and 508 in the foregoing embodiments. Processor 31 and/or processor 35 are configured to enable the communication device to perform step 509 in the above-described embodiment.

In another example, the communication device is an access network device or a chip applied in the access network device. In this case, the transceiver 33 is used to support the communication device to perform the actions of transmitting performed by the access network device in step 401 in the above embodiment. Processor 31 and/or processor 35 are configured to enable the communication device to perform the determining of the resource allocated to the terminal for transmitting the data of the first application in the above embodiments.

In a possible implementation, the transceiver 33 is further configured to support the communication device to perform the sending action performed by the access network device in step 508 in the foregoing embodiment. The transceiver 33 is further configured to support the communication device to perform the receiving action performed by the access network device in step 511 in the above embodiments. Processor 31 and/or processor 35 to enable the communication device to perform the processing actions performed by the access network device in step 512 of the above embodiments.

In another example, the communication device is an access management network element, or a chip applied in the access management network element. In this case, the communication interface is used to enable the communication device to perform the sending action performed by the access management network element in step 502 of fig. 5 of the above embodiment. Processor 31 and/or processor 35 are also configured to enable the communication device to perform the actions of determining the identity of one or more applications of the above-described embodiments.

In a possible embodiment, the communication interface is further configured to support the communication device to perform the receiving actions performed by the access management network element in step 503, step 504, and step 510 in the foregoing embodiments. The communication interface is further configured to support the communication device to perform the sending actions performed by the access management network element in step 505 and step 511 in the foregoing embodiments.

Fig. 16 is a schematic structural diagram of a chip 150 according to an embodiment of the present disclosure. Chip 150 includes one or more (including two) processors 1510 and a communication interface 1530.

Optionally, the chip 150 further includes a memory 1540, which may include both read-only memory and random access memory, and provides operating instructions and data to the processor 1510. A portion of memory 1540 may also include non-volatile random access memory (NVRAM).

In some embodiments, memory 1540 stores elements, execution modules, or data structures, or a subset thereof, or an expanded set thereof.

In the embodiment of the present application, by calling an operation instruction stored in the memory 1540 (the operation instruction may be stored in an operating system), a corresponding operation is performed.

One possible implementation is: the access network equipment, the terminal and the access management network element have similar structures of chips, and different devices can use different chips to realize respective functions.

The processor 1510 controls processing operations of any one of an access network device, a terminal, and an access management network element, and the processor 1510 may also be referred to as a Central Processing Unit (CPU).

Memory 1540 can include both read-only memory and random-access memory, and provides instructions and data to processor 1510. A portion of memory 1540 may also include NVRAM. For example, in an application where memory 1540, communications interface 1530 and memory 1540 are coupled together by bus system 1520, where bus system 1520 may include a power bus, control bus, status signal bus, etc. in addition to a data bus. For clarity of illustration, however, the various buses are labeled in fig. 16 as bus system 1520.

The method disclosed in the embodiments of the present application may be applied to the processor 1510 or implemented by the processor 1510. The processor 1510 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by instructions in the form of hardware, integrated logic circuits, or software in the processor 1510. The processor 1510 may be a general purpose processor, a Digital Signal Processor (DSP), an ASIC, an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1540, and the processor 1510 reads the information in the memory 1540, and performs the steps of the above method in combination with the hardware thereof.

In a possible implementation, communication interface 1530 is configured to perform the steps of receiving and sending of the access network device, the terminal, and the access management network element in the embodiments shown in fig. 4-13. The processor 1510 is configured to perform the steps of the processing of the access network device, the terminal, and the access management network element in the embodiments shown in fig. 4-13.

The above communication unit may be a communication interface of the device for receiving signals from other devices. For example, when the device is implemented in the form of a chip, the transceiving unit is a communication interface for the chip to receive signals or transmit signals from other chips or devices.

In one aspect, a computer-readable storage medium is provided, in which instructions are stored, and when executed, the instructions implement the functions of the terminal in fig. 4 to 5.

In one aspect, a computer-readable storage medium is provided, having stored therein instructions, which when executed, implement the functionality of the access network apparatus as in fig. 4-5.

In one aspect, a computer-readable storage medium is provided, in which instructions are stored, and when executed, implement the functions of the access management network element in fig. 4 to 5.

In one aspect, a computer program product comprising instructions is provided, the computer program product comprising instructions that, when executed, implement the functions of the access management network element as in fig. 4-5.

In yet another aspect, a computer program product comprising instructions is provided, the computer program product comprising instructions therein, which when executed, implement the functionality of the access network apparatus as in fig. 4-5.

In a further aspect, a computer program product comprising instructions is provided, the computer program product comprising instructions that, when executed, implement the functionality of the terminal as in fig. 4-5.

In one aspect, a chip is provided, the chip is applied in a terminal, the chip includes at least one processor and a communication interface, the communication interface is coupled with the at least one processor, and the processor is configured to execute instructions to implement the functions of the terminal in fig. 4 to 5.

In another aspect, a chip is provided, where the chip is applied in an access network device, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to implement the functions of the access network device in fig. 4 to 5.

In another aspect, a chip is provided, where the chip is applied to an access management network element, and the chip includes at least one processor and a communication interface, where the communication interface is coupled to the at least one processor, and the processor is configured to execute instructions to implement the functions of the access management network element in fig. 4 to 5.

An embodiment of the present application provides a communication system, including: the terminal, the access management network element and the access network equipment. Wherein the terminal is configured to perform the functions as performed by the terminal in fig. 4 to 5, and the access management network element is configured to perform the steps performed by the access management network element in any one of fig. 4 to 5. The access network device is configured to perform the functions as performed by the access network device in fig. 4-5.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are performed in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer program or instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer program or instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire or wirelessly. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that integrates one or more available media. The usable medium may be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; or optical media such as Digital Video Disks (DVDs); it may also be a semiconductor medium, such as a Solid State Drive (SSD).

While the present application has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed application, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.

Although the present application has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the application. Accordingly, the specification and figures are merely exemplary of the present application as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the present application. It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include such modifications and variations.

Claims

A method of communication, comprising:

a terminal receives resource information from access network equipment, wherein the resource information is used for representing resources of a direct connection communication interface;

and the terminal transmits data through the direct connection communication interface resource and is in a Radio Resource Control (RRC) -inactive state.
The method of claim 1, wherein the direct communication interface resources are direct communication interface resources based on a network scheduling pattern.
The method according to claim 1 or 2, before the terminal receives resource information from an access network device, the method further comprising:

and the terminal requests the direct connection communication interface resource from the access network equipment.
The method according to any of claims 1 to 3, wherein the data is data of a first application of the terminal, and the direct communication interface resource is configured to transmit the data of the first application.
The method of claim 4, wherein the first application belongs to an allowed service of the terminal, and wherein the method further comprises:

the terminal receives the identification of the allowed service of the terminal from an access management network element.
The method of claim 5, wherein before the terminal receives the identification of the allowed services from the terminal of an access management network element, the method further comprises:

and the terminal sends at least one service identifier to the access management network element, wherein the at least one service identifier is used for indicating the service requested by the terminal.
The method of claim 6, wherein the identifier of the at least one service is carried in a first message, and the first message further includes a first parameter, and the first parameter is used to characterize that the terminal requests to transmit data using a network scheduling mode on a direct connection communication interface.
The method of claim 7, wherein the method comprises:

the terminal receives first indication information, wherein the first indication information is used for indicating that the terminal is allowed to transmit data of the first application by using a direct communication interface resource based on a network scheduling mode in the RRC-inactive state;

the terminal transmits data through the direct connection communication interface resource, and the method comprises the following steps:

and the terminal transmits the data of the first application through the direct connection communication interface resource according to the first indication information.
The method according to claim 7 or 8, wherein the first message further contains a first link identifier indicating a communication link for the terminal to transmit data on the direct communication interface.
The method according to any one of claims 5 to 9, wherein the allowed traffic is traffic of the terminal that is allowed to be transmitted over a direct communication interface.
The method according to any one of claims 1 to 10, further comprising:

the terminal sends a first quality of service parameter to an access management network element, wherein the first quality of service parameter is a quality of service parameter used by the terminal for requesting data transmission on a direct connection communication interface.
The method according to any one of claims 1 to 11, further comprising:

the terminal receives authorized service quality parameters from an access management network element, and the authorized service quality parameters are used for the terminal to transmit data on a direct connection communication interface.
The method according to any one of claims 1 to 12, wherein the data is data of a first application, the direct communication interface is a PC5 interface, and the method further comprises:

the terminal generates a PC5 interface service quality flow corresponding to the first application;

the terminal associates the data of the first application to the PC5 interface quality of service flow.
The method according to claim 13, wherein the terminal generates the PC5 interface quality of service flow corresponding to the first application, and comprises:

the terminal receives configuration information from a policy control network element, and generates a PC5 interface service quality flow corresponding to the first application according to the configuration information; alternatively, the first and second electrodes may be,

and the terminal generates a PC5 interface service quality flow corresponding to the first application according to the pre-configured parameters.
The method of any one of claims 1 to 14, further comprising:

and the terminal sends a second parameter to an access management network element, wherein the second parameter is used for representing that the terminal stops transmitting data on the direct connection communication interface.
The method according to any of claims 1 to 15, wherein before the terminal transmits data via the direct communication interface resource, the method further comprises:

the terminal enters an RRC-inactive state.
The method of claim 16, further comprising:

the terminal receives a first notification message from the access network equipment, wherein the first notification message is used for notifying the terminal to enter an RRC-inactive state;

the terminal enters an RRC-inactive state, comprising:

and the terminal enters an RRC-inactive state according to the first notification message.
A method of communication, comprising:

the method comprises the steps that access network equipment sends resource information to a terminal, wherein the resource information is used for representing direct connection communication interface resources, and the direct connection communication interface resources are used for transmitting data when the terminal is in a Radio Resource Control (RRC) -non-activated state.
The method of claim 18, wherein the direct communication interface resources are direct communication interface resources based on a network scheduling pattern.
The method according to claim 18 or 16, further comprising:

the access network equipment receives the preferred scheduling mode of the terminal from an access management network element;

the access network equipment sends resource information to the terminal, and the resource information comprises the following steps:

and the access network equipment sends the resource information to the terminal according to the optimal scheduling mode of the terminal.
The method of claim 20, wherein the data is data of a first application, and the preferred scheduling mode is a preferred scheduling mode corresponding to the first application.
The method of claim 21, wherein the first application belongs to an allowed service of the terminal.
The method of claim 22, wherein the allowed traffic is traffic of the terminal that is allowed to be transmitted over a direct communication interface.
The method of any one of claims 18 to 23, further comprising:

the access network equipment sends first indication information to the terminal, wherein the first indication information is used for indicating that the terminal is allowed to transmit data of a first application by using a direct connection communication interface resource based on a network scheduling mode in the RRC-inactive state.
The method of any one of claims 18 to 24, further comprising:

the access network equipment sends a first notification message to the terminal, wherein the first notification message is used for notifying the terminal to enter an RRC-inactive state.
The method of any one of claims 18 to 25, further comprising:

and when the terminal stops transmitting data through the direct connection communication interface resource, the access network equipment releases the direct connection communication interface resource.
A method of communication, comprising:

an access management network element obtains subscription information of a terminal;

and the access management network element sends the identifier of the allowed service of the terminal to the terminal according to the subscription information.
The method of claim 27, wherein prior to said sending the terminal the identification of allowed services for the terminal, the method further comprises:

and the access management network element receives an identifier of at least one service from the terminal, wherein the identifier of the at least one service is used for indicating the service requested by the terminal.
The method of claim 28, wherein the identifier of the at least one service is carried in a first message, and the first message further includes a first parameter, and the first parameter is used to characterize that the terminal requests to transmit data on a direct connection communication interface using a network scheduling mode;

the method further comprises the following steps:

and the access management network element sends first indication information to access network equipment or the terminal according to the first parameter, wherein the first indication information is used for indicating that the terminal is allowed to transmit data of a first application by using a direct connection communication interface resource based on a network scheduling mode in an RRC-inactive state, and the first application belongs to the at least one service.
The method of claim 29, wherein the first message further comprises a first link identifier indicating a communication link for the terminal to transmit data over a direct communication interface.
The method of any one of claims 27 to 30, further comprising:

and the access management network element sends authorized service quality parameters to the terminal, wherein the authorized service quality parameters are used for the terminal to transmit data on the direct connection communication interface.
The method of claim 31, further comprising:

and the access management network element receives a first service quality parameter from the terminal, wherein the first service quality parameter is a service quality parameter used by the terminal for requesting data transmission on a direct connection communication interface.
The method of any one of claims 27 to 32, further comprising:

the access management network element receives a second parameter from the terminal, wherein the second parameter is used for representing that the terminal stops transmitting data on the direct connection communication interface;

and the access management network element instructs the access network equipment to release the direct connection communication interface resource of the terminal according to the second parameter.
The method of any one of claims 27 to 33, further comprising:

and the access management network element sends the preferred scheduling mode of the terminal to the access network equipment.
The method according to any of claims 27 to 34, wherein the allowed traffic is traffic of the terminal that is allowed to be transmitted over a direct communication interface.
A communications apparatus, comprising: at least one processor coupled to a memory, the memory having instructions stored therein that are executed by the processor to implement the method of any of claims 1-17.
A communications apparatus, comprising: at least one processor coupled to a memory, the memory having instructions stored therein that are executed by the processor to implement the method of any of claims 18-26.
A communications apparatus, comprising: at least one processor coupled to a memory, the memory having instructions stored therein that are executed by the processor to implement the method of any of claims 27-35.
A communication system, comprising: an access network device configured to perform the method of any one of claims 18 to 26, and an access management network element configured to perform the method of any one of claims 27 to 35.
The system according to claim 39, further comprising a terminal configured to perform the method according to any one of claims 1 to 17.
A computer readable storage medium having stored thereon instructions which, when executed, perform the method of any of claims 1 to 17, or the method of any of claims 18 to 26, or the method of any of claims 27 to 35.