WO2018214708A1 - Communication method and apparatus - Google Patents

Communication method and apparatus Download PDF

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Publication number
WO2018214708A1
WO2018214708A1 PCT/CN2018/085178 CN2018085178W WO2018214708A1 WO 2018214708 A1 WO2018214708 A1 WO 2018214708A1 CN 2018085178 W CN2018085178 W CN 2018085178W WO 2018214708 A1 WO2018214708 A1 WO 2018214708A1
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WIPO (PCT)
Prior art keywords
terminal
identifier
inactive state
base station
state
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PCT/CN2018/085178
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French (fr)
Chinese (zh)
Inventor
李铕
刘亚林
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华为技术有限公司
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Publication date
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Publication of WO2018214708A1 publication Critical patent/WO2018214708A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • the embodiments of the present application relate to the field of communications technologies, and in particular, to a communication method and apparatus.
  • the concept of inactive state is introduced in 5G communication systems.
  • the inactive state is a state between a connected state and an idle state. After the terminal transitions from the inactive state to the idle state, there may be a case where the current state of the terminal recorded by the base station is inactive. In this case, the prior art has not proposed a technical solution for how to establish a connection between a terminal and a base station.
  • the present application provides a communication method and apparatus, and in particular, provides a technical solution for establishing a connection between a base station and a terminal, which can be applied to, but not limited to, a state out-of-synchronization scenario.
  • the present application provides a communication method and apparatus.
  • the method may include: determining, by the terminal in an idle state, an identifier of the terminal in an inactive state; the terminal initiating a connection procedure according to the identifier of the terminal in an inactive state.
  • the last state before the terminal is in the idle state is the inactive state
  • the identifier of the terminal in the inactive state determined by the terminal is the identifier of the terminal in the latest state (ie, the inactive state).
  • the connection process may be initiated by the terminal in an inactive state, so that the base station can establish an air interface connection and reuse the established RAN associated with the inactive state identifier.
  • the RAN is an abbreviation of a radio access network.
  • CN is the English abbreviation of core network (CN).
  • the identifier of the terminal in the inactive state may be a resume ID in a long term evolution (LTE) system, or an access stratum (AS) context ID in a new radio (NR) system.
  • LTE long term evolution
  • AS access stratum
  • NR new radio
  • the terminal initiates the connection process according to the identifier of the terminal in the inactive state
  • the method may include: the terminal sends a connection establishment request, where the connection establishment request includes information indicating the identifier of the terminal in an inactive state.
  • This possible design can be thought of as a connection request multiplexing connection setup request. Of course, this application is not limited to this.
  • the terminal initiates a connection process according to the identifier of the terminal in an inactive state, which may include: the terminal sends a connection recovery request, where the connection recovery request includes information indicating the identity of the terminal in an inactive state.
  • This possible design can be thought of as a connection request multiplexing connection recovery request.
  • this application is not limited to this.
  • the connection setup request/connection recovery request includes the identity of the terminal in the idle state and the identity of the terminal in the inactive state.
  • the connection establishment request/connection recovery request includes the identifier and indication information of the terminal.
  • the identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state or other information that can be used to indicate the identifier of the terminal.
  • the indication information is used to indicate the type of connection establishment request/connection recovery request or the type indicating the identity of the terminal.
  • this application is not limited to this.
  • the processing mode of the base station may be different. For details, refer to the following.
  • the method may further include: when the terminal transitions from the inactive state to the idle state, storing information indicating the identity of the terminal in an inactive state. In this way, the terminal can be supported in the idle state, and the connection process is initiated according to the identifier of the terminal in the inactive state.
  • the information indicating the identifier of the terminal in the inactive state may be an identifier of the terminal in an inactive state, or an index of the identifier of the terminal in an inactive state.
  • the type of the identifier of the terminal is defined in the application, and the type may include an identifier of the terminal in an inactive state and an identifier of the terminal in an idle state.
  • the index of any type of identification of the terminal can be expressed in binary. For example, "1" can be used as an index of the identifier of the terminal in the inactive state, and "0" is used as the index of the identifier of the terminal in the idle state. Of course, this application is not limited to this.
  • the saving of the identifier of the terminal in the inactive state may include: when the terminal does not send a state transition notification to the base station, and saves the identifier of the terminal in an inactive state.
  • the terminal transitions from the inactive state to the idle state, and does not send a state transition notification to the base station, indicating that the state is out of synchronization at this time.
  • This optional design can be considered as an implementation scenario in which the state is out of step, although the application is not limited thereto.
  • the saving of the identifier of the terminal in the inactive state may include: when the terminal fails to send the state transition notification to the base station, the identifier of the terminal in the inactive state is saved.
  • the terminal transitions from the inactive state to the idle state, and fails to successfully send a state transition notification to the base station, indicating that the state is out of synchronization at this time.
  • This optional design can be considered as an implementation scenario in which the state is out of step, although the application is not limited thereto.
  • the method may further include: the terminal receiving the RAN paging message sent by the base station.
  • the possible design may be that the terminal initiates a connection procedure triggered by the RAN paging message sent by the base station.
  • this application is not limited to this.
  • the terminal may also initiate a connection process when there is uplink data to be sent.
  • the method may further include: the terminal saves the discontinuous reception (DRX) configuration information of the terminal in an inactive state; the terminal according to the DRX The configuration information determines the time at which the RAN paging message is received. In this way, the terminal can be supported to receive the RAN paging message in the idle state.
  • DRX discontinuous reception
  • the saving of the identifier of the terminal in the inactive state may include: when the identifier of the terminal in the inactive state is within the valid time, the identifier of the terminal in the inactive state is saved.
  • the identity of the terminal in the inactive state is deleted. In this way, the storage resources of the terminal can be saved.
  • the method may further include: deleting the terminal inactive when the terminal moves out of the RN-based notification area (RNA) related to the identifier of the terminal in the inactive state. State of the logo.
  • RNA is the RNA in which the terminal is switched to the idle state. In this way, the storage resources of the terminal can be saved.
  • the method may further include: the terminal saves the cell information corresponding to the RNA associated with the identifier of the terminal in the inactive state.
  • the cell information corresponding to the RNA is used to determine whether the terminal removes the RNA. In this way, the terminal can be supported to determine whether to remove the RNA in the idle state.
  • the present application also provides a communication device that can implement the communication method of the first aspect.
  • the device may be a terminal, which may implement the above method by software, hardware, or by executing corresponding software by hardware.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the first aspect method described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the apparatus can include a processing unit and a transceiver unit.
  • the processing unit may be configured to determine, when the terminal is in an idle state, an identifier of the terminal in an inactive state.
  • the sending unit may be configured to initiate a connection process according to the identifier of the terminal in an inactive state.
  • the transceiver unit may be specifically configured to send a connection establishment request, where the connection establishment request includes information indicating the identity of the terminal in an inactive state.
  • the transceiver unit may be specifically configured to send a connection recovery request, where the connection recovery request includes information indicating the identity of the terminal in an inactive state.
  • the terminal may further include: a storage unit, configured to save the identifier of the terminal in an inactive state when the terminal transitions from an inactive state to an idle state.
  • the storage unit may be specifically configured to: when the terminal does not send a state transition notification to the base station, save the identifier of the terminal in an inactive state.
  • the storage unit may be specifically configured to: when the terminal transitions from an inactive state to an idle state, and the terminal fails to successfully send a state transition notification to the base station, and saves the identifier of the terminal in an inactive state.
  • the transceiver unit can also be configured to receive a RAN paging message sent by the base station.
  • the storage unit is further configured to save the DRX configuration information of the terminal in an inactive state.
  • the processing unit may be further configured to: determine, according to the DRX configuration information, a reception time of the RAN paging message.
  • the storage unit may be specifically configured to save the identifier of the terminal in an inactive state when the identifier of the terminal in the inactive state is within a valid time.
  • the processing unit may be further configured to delete the identifier of the terminal in an inactive state when the terminal ends in the inactive state of the identifier of the inactive state.
  • the processing unit may be further configured to: when the terminal moves out of the identification-related RNA of the terminal in an inactive state, delete the identifier of the terminal in an inactive state.
  • the storage unit may be further configured to: save cell information corresponding to the RNA associated with the identifier of the terminal in the inactive state; wherein the cell information corresponding to the RNA is used to determine whether the terminal removes the RNA.
  • the present application provides another communication method and apparatus.
  • the method may include the base station receiving a connection establishment request, the connection establishment request including an identifier of the terminal in an inactive state. Then, the base station establishes an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and reuses the connection between the base station and the core network device.
  • the base station may establish an air interface connection according to the identifier of the terminal in the inactive state in the connection establishment request, and reuse the established RAN-CN related to the identifier of the inactive state. connection.
  • the method may further include: the base station sending a RAN paging message to the terminal, where the RAN paging message is used to indicate that the terminal sends a connection establishment request.
  • the present application also provides a communication device, which can implement the communication method described in the second aspect.
  • the apparatus may be a base station, which may implement the above method by software, hardware, or by executing corresponding software by hardware.
  • the apparatus can include a processor and a memory.
  • the processor is configured to support the apparatus to perform the corresponding functions of the second aspect method described above.
  • the memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device.
  • the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements.
  • the communication interface can be a transceiver.
  • the apparatus can include a processing unit and a transceiver unit.
  • the transceiver unit is configured to receive a connection establishment request, where the connection establishment request includes an identifier of the terminal in an inactive state.
  • the processing unit is configured to establish an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and multiplex the connection between the base station and the core network device.
  • the transceiver unit may be further configured to send a RAN paging message to the terminal, where the RAN paging message is used to indicate that the terminal sends a connection establishment request.
  • the application also provides a computer storage medium having stored thereon a computer program (instructions) that, when executed on a computer, cause the computer to perform the method of any of the above aspects.
  • the application also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.
  • FIG. 1 is a schematic diagram of a system architecture applicable to a technical solution provided by an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of a radio access network to which the technical solution provided by the embodiment of the present application is applied;
  • FIG. 3 is a schematic diagram of a connection establishment process in an LTE system according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of a connection reactivation process in an NR system according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of interaction of a communication method according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of interaction of another communication method according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
  • the technical solution provided by the present application can be applied to various communication systems in which an inactive state of a terminal is introduced, for example, an inactive state of a terminal, a 5G communication system, a future evolution system, or multiple communications is introduced on the basis of an existing communication system.
  • Converged systems and more. Can include a variety of application scenarios, such as machine to machine (M2M), D2M, macro communication, enhanced mobile broadband (eMBB), ultra high reliability and ultra low latency communication (ultra Reliable & low latency communication (uRLLC) and massive machine type communication (mMTC) scenarios.
  • M2M machine to machine
  • D2M macro communication
  • eMBB enhanced mobile broadband
  • uRLLC ultra high reliability and ultra low latency communication
  • mMTC massive machine type communication
  • These scenarios may include, but are not limited to, a communication scenario between the terminal and the terminal, a communication scenario between the base station and the base station, a communication scenario between the base station and the terminal, and the like.
  • the technical solution provided by the embodiment of the present application can also be applied to a scenario between a terminal and a terminal in a 5G communication system, or a communication between a base station and a base station.
  • FIG. 1 shows a schematic diagram of a communication system, which may include a core network, a radio access network, and a terminal.
  • a device in a radio access network may include one or more base stations.
  • the devices in the core network may include one or more mobility management entities (MMEs) (only one shown), one or more service gateways (serving gateways) connected to the MME. SGW) or PDN gateway (PGW), where PDN is the abbreviation of packet data network.
  • MME mobility management entities
  • SGW service gateways
  • PGW PDN gateway
  • the MME is used to manage the bearer establishment and configuration between the base station and the SGW, and triggers paging of the idle terminal when the downlink data reaches the core network device (such as the SGW).
  • the SGW/PGW is used for routing and forwarding of data, and for performing quality of service (QoS) control of the user plane.
  • QoS quality of service
  • devices in the core network may include access and mobility management function (AMF) entities, and user plane function (UPF) entities.
  • AMF access and mobility management function
  • UPF user plane function
  • the AMF entity is used to manage the bearer establishment and configuration between the base station and the UPF entity, and triggers paging of the idle terminal when the downlink data reaches the core network device (such as the UPF entity).
  • the UPF entity is used for routing and forwarding of data, and for performing QoS control of the user plane.
  • FIG. 2 shows a schematic diagram of a radio access network, which may include at least one RNA (only one RNA is shown).
  • An inactive terminal sends a location update request when moving from one RNA to another.
  • Each RNA may include one or more base stations/cells.
  • the base station in the RNA may include a serving base station, an anchor base station, and other base stations from a different perspective on the role of the terminal.
  • a serving base station refers to a base station or terminal to which a terminal in an inactive state is reselected to move a newly accessed base station within the RNA. Any base station can serve as a serving base station for one or more terminals, and the serving base station of the same terminal can be changed.
  • the serving base station of the terminal can be understood as a base station newly accessed by the terminal (ie, a new base station or a target base station).
  • An anchor base station is a base station that configures a terminal to switch from a connected state to an inactive state, or a base station that stores context information of the terminal.
  • the anchor base station of the terminal can be understood as the base station (ie, the old base station or the source base station) that the terminal accessed the most recently before the handover to the new base station.
  • Other base stations refer to base stations other than the serving base station and the anchor base station.
  • the terminal is within the coverage of base station 1 and transitions from the connected state to the inactive state.
  • the terminal moves into the coverage of the base station 2. Then, it can be considered that when the terminal is in the coverage of the base station 2, the base station 1 is the anchor base station of the terminal, and the base station 2 is the serving base station of the terminal.
  • the base station other than the anchor base station and the serving base station of the terminal in the RNA is the other base station for the terminal.
  • a base station may be a device capable of communicating with the terminal.
  • the base station can be a relay station or an access point or the like.
  • the base station may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, or may be a broadband code division.
  • the NB (NodeB) in the wideband code division multiple access (WCDMA) may also be an eNB or an eNodeB (evolutional NodeB) in the LTE system.
  • the base station may also be a wireless controller in a cloud radio access network (CRAN) scenario.
  • the base station may also be a network device in a 5G network or a network device in a future evolved network; or may be a wearable device or an in-vehicle device.
  • the terminal may be a user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE proxy, or a UE device.
  • UE user equipment
  • the access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and A wireless communication capable handheld device, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a future 5G network, or a terminal in a future evolved PLMN network, or the like.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistant
  • a wireless communication capable handheld device a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a future 5G network, or a terminal in a future evolved PLMN network, or the like.
  • An air interface connection refers to a connection between a terminal and a RAN device (such as a base station).
  • the air interface connection includes a user plane bearer between the terminal and the base station, for example, a data radio bearer (DRB) in the LTE system; and a control plane bearer between the terminal and the base station, for example, a signaling radio bearer in the LTE system ( Signal radio beare, SRB).
  • DRB data radio bearer
  • SRB Signal radio beare
  • RAN-CN connection refers to the connection between a RAN device (such as a base station) and a CN device.
  • the RAN-CN connection includes a user plane bearer between the base station and the CN device, such as an S1 user plane bearer in an LTE system; and a control plane bearer between the base station and the CN device.
  • the CN device may be an SGW/PGW.
  • a CN device may be a UPF entity.
  • the idle state, the inactive state, and the connected state are all used to describe the state of the terminal.
  • the control plane bearer of the air interface needs to be established first, then the user plane bearer between the RAN-CN is established, and the user plane of the air interface is configured while establishing the user plane bearer between the RAN-CN. Hosted.
  • the user plane bearer of the air interface has been suspended (suspend), and the user plane bearer and control plane bearer between the RAN-CN are still maintained.
  • the terminal initiates a call or a service request, the user plane bearer of the air interface needs to be activated, and the user plane bearer and control plane bearer between the existing RAN-CNs are reused.
  • the control plane bearer of the air interface has been established, and the default user plane bearer (including the user plane bearer of the air interface and the user plane bearer between the RAN-CN) has been established. If the default user plane bearer cannot meet the QoS requirements of the service, a dedicated user plane bearer (including the user plane bearer of the air interface and the user plane bearer between the RAN-CN) is established.
  • State synchronization means that the actual current state of the terminal is the same as the current state of the terminal recorded by the base station.
  • the actual current state of the terminal is an inactive state
  • the current state of the terminal recorded by the base station is also an inactive state.
  • the state out of synchronization means that the actual current state of the terminal is different from the current state of the terminal recorded by the base station.
  • the state out-of-synchronization mainly means that the current state of the terminal is an idle state, and is converted from an inactive state to an idle state, and the current state of the terminal recorded by the base station is still in an inactive state.
  • the identifier of the terminal in the idle state refers to the identifier assigned by the device in the CN to the terminal when the terminal is in the idle state.
  • the identifier of the terminal in the idle state may be referred to as the terminal ID of the CN allocation, or the identifier of the terminal maintained by the CN.
  • the identifier of the terminal in the idle state is, for example but not limited to, a serving temporary mobile subscriber identity (S-TMSI), or an international mobile subscriber identification number (IMSI).
  • the identifier of the terminal in the inactive state refers to the identifier assigned by the device in the RNA in which the terminal is located in the inactive state.
  • the identifier of the inactive state of the terminal may be referred to as the terminal ID assigned by the RAN or the identifier of the terminal maintained by the RAN.
  • the identifier of the terminal in the inactive state is, for example but not limited to, the resume ID in the LTE system or the AS context ID in the NR system. Of course, this application is not limited to this.
  • the terminal can move from one RNA to another, and when the terminal is in different RNAs, the identification of the inactive state of the terminal is different.
  • the type of the identifier of the terminal is defined, and the type may include: an identifier of the terminal in an inactive state, an identifier of the terminal in an idle state, and the like.
  • RAN paging ie RAN paging message or RAN triggered paging message, which may also be referred to as RAN-initiated paging or RAN-based notification.
  • CN paging which is a CN paging message or a CN triggered paging message, which may also be referred to as CN-initiated paging.
  • the RAN paging and the CN paging may be, for example but not limited to, a paging message sent in the case where the downlink data needs to be transmitted or the system message is changed on the network side, and is used to find the terminal in a certain area.
  • the triggering entities of RAN paging and CN paging are different.
  • the RAN paging is triggered by the base station.
  • CN paging is triggered by the MME; in the NR system, CN paging is triggered by the AMF entity.
  • the range of regions in which RAN paging and CN paging act is also different.
  • Figure 3 shows a schematic diagram of the connection establishment process in an LTE system. Specifically, a schematic diagram of a process in which a terminal transitions from an idle state to a connected state in an LTE system is given. The process includes:
  • the terminal sends a random access channel (RACH) preamble to the serving base station.
  • the serving base station receives the RACH preamble sent by the terminal, and after receiving the RACH preamble, allocates an uplink resource to the terminal.
  • the uplink resource may include an uplink resource used by the terminal to send uplink data and/or uplink signaling, such as but not limited to an RRC connection setup request.
  • the terminal may execute S102 if there is a demand to send a service request.
  • the serving base station sends a random access response to the terminal, where the random access response includes information indicating the uplink resource.
  • the terminal receives a random access response sent by the serving base station.
  • S102-S104 can be regarded as a random access process, and other steps can be included in the process, which is not detailed in this application.
  • the terminal sends an RRC connection establishment request to the serving base station.
  • the RRC connection establishment request includes an identifier of the terminal in an idle state, and the like.
  • the serving base station receives the RRC connection setup request sent by the terminal, and after receiving the RRC connection setup request, generates SRB1 configuration information of the terminal, and then performs S108.
  • a plurality of SRBs can be established between the base station and the terminal, wherein the base station and the terminal use SRB1 to perform integrity protection and encryption protection on the transmitted RRC signaling.
  • the serving base station sends an RRC connection setup response to the terminal, where the RRC connection setup response includes SRB1 configuration information of the terminal.
  • the terminal receives the connection setup response sent by the serving base station, and configures SRB1 according to the SRB1 configuration information, and then performs S110.
  • the foregoing S106-S108 may be considered as a process of establishing an air interface SRB1 between the terminal and the serving base station, and the process may further include other steps, which are not described in detail in this application. At this point, the terminal can be considered to have entered the connected state.
  • the terminal sends an RRC connection setup complete message to the serving base station, where the RRC connection setup complete message includes a service request.
  • the RRC Connection Setup Complete message is used to notify the serving base station that the terminal has configured SRB1 on the one hand, and the serving base station to establish context information that satisfies the service request.
  • the serving base station receives the RRC connection setup complete message sent by the terminal, and then performs S112.
  • S112 The serving base station sends a context establishment request to the MME, where the context establishment request includes a service request.
  • the MME receives the context establishment request sent by the serving base station, and establishes context information that satisfies the service request included in the context establishment request, and then performs S114.
  • the MME sends a context setup complete message to the serving base station to notify the serving base station that the MME has established context information that satisfies the service request.
  • the serving base station receives a context establishment complete message sent by the MME.
  • S110-S114 may be considered as a process of establishing context information of the terminal on the network side, and the process may further include other steps, which are not described in detail in this application.
  • the serving base station generates configuration information of the DRB and other SRBs, and then sends an RRC connection reconfiguration message including configuration information of the DRB and other SRBs to the terminal.
  • the terminal receives the RRC connection reconfiguration message sent by the serving base station, and configures the DRB and other SRBs according to the configuration information of the DRB and other SRBs.
  • the terminal sends an RRC connection reconfiguration complete message to the serving base station to notify the serving base station that the terminal has configured the DRB and other SRBs.
  • the serving base station receives an RRC connection reconfiguration complete message sent by the terminal.
  • S116-S118 may be considered as a process of establishing an air interface DRB and other SRBs, and the process may further include other steps, which are not detailed in this application.
  • S120 The MME sends a modify bearer request to the SGW/PGW.
  • the SGW/PGW receives the modified bearer request, and establishes a user plane bearer between the RAN-CNs that meets the requirements of the service request, and then executes S122.
  • the SGW/PGW sends a modify bearer response to the MME, and the MME receives the modified bearer response.
  • S120-S122 may be considered as a process of establishing a user plane bearer between the RAN-CN, and the process may further include other steps, which are not detailed in this application.
  • Figure 4 shows a schematic diagram of the process of re-active/resume in the NR system. Specifically, a schematic diagram of the process of the terminal transitioning from the inactive state to the connected state in the NR system is given. The process includes:
  • S202 to S204 Reference may be made to S102 to S104, and the present application is not limited thereto.
  • the terminal sends an RRC connection reactivation request to the serving base station.
  • the RRC Connection Reactivation Request includes an identity of the terminal in an inactive state.
  • the serving base station receives the RRC connection reactivation request sent by the terminal, and reads the locally stored context information of the terminal, and then activates the user plane bearer and the control plane bearer of the air interface.
  • the serving base station returns an RRC connection reactivation response to the terminal, to instruct the terminal to activate the user plane bearer and the control plane bearer of the air interface.
  • the terminal receives the RRC connection reactivation response sent by the serving base station, and then activates the user plane bearer and control plane bearer of the air interface.
  • the terminal sends an RRC connection reactivation complete message to the serving base station to notify the serving base station that the terminal has activated the user plane bearer and the control plane bearer of the air interface.
  • the serving base station receives an RRC connection reconfiguration complete message sent by the terminal.
  • the serving base station may obtain the context information of the terminal from the anchor base station, so as to complete the conversion of the anchor base station, specifically, the following step S207a may be performed before S208 after S206.
  • S207b completes the conversion of the anchor base station.
  • the RAN-CN connection can be switched from the anchor base station to the serving base station by using a path switch. Specifically, the path switching can be completed by performing the following steps S207c to S207f. It can be understood that if the serving base station is the same as the anchor base station, S207a to S207f may not be executed.
  • S207a The serving base station sends a context request to the anchor base station to request context information of the terminal.
  • the anchor base station receives the context request sent by the serving base station, and then performs S207b.
  • S207b The anchor base station sends a context response to the serving base station, where the context response includes context information of the terminal.
  • the serving base station receives the context response sent by the terminal, and saves the context information of the terminal, and then performs S207c.
  • S207c The serving base station sends a path switch request to the AMF entity, where the path switch request is used to request to switch the anchor base station to the serving base station.
  • the AMF entity receives the path switch request sent by the serving base station, and then performs S207d.
  • the AMF entity is used to control the UPF entity to perform path conversion.
  • S207d The AMF entity sends a modify bearer request to the UPF entity.
  • the UPF entity receives the modified bearer request sent by the AMF entity, and switches the RAN-CN connection from between the UPF entity and the anchor base station to the UPF entity and the serving base station. Then S207e is executed.
  • S207e The UPF entity sends a modify bearer response to the AMF entity.
  • S207f The AMF entity sends a path switch response to the serving base station.
  • the base station described hereinafter refers to the serving base station of the terminal.
  • FIG. 5 is a schematic diagram showing the interaction of a communication method provided by the present application. The method includes:
  • S302 The terminal transitions from an inactive state to an idle state, and saves the identifier of the terminal in an inactive state.
  • the terminal can autonomously transition from the inactive state to the idle state, that is, the terminal itself triggers the terminal to transition from the inactive state to the idle state. For example, but not limited to any of the following: the terminal loses cell coverage in an inactive state, for example, if the strength of the cell signal received by the terminal is lower than a certain threshold and continues to be lost for a period of time, the cell is considered to be idle. State; after the terminal fails to send RRC signaling multiple times, it transitions from an inactive state to an idle state. In addition, the terminal can also be switched from an inactive state to an idle state triggered by other network devices (ie, network devices other than the base station) or other terminals. Of course, this application is not limited to this.
  • the LTE protocol stipulates that when the terminal is in the inactive state, it saves the relevant information of the terminal in the inactive state, and deletes the related information of the terminal in the inactive state after the inactive state is converted to the idle state.
  • the base station saves related information of the terminal in an inactive state, and deletes the terminal in the non-active state after the current state of the recorded terminal is changed from the inactive state to the idle state. Information about the active state.
  • the related information of the terminal in the inactive state includes, but is not limited to, at least one of the following: the identifier of the terminal in the inactive state, the DRX configuration information of the terminal in the inactive state, and the cell information corresponding to the RNA of the terminal, such as the cell list.
  • the LTE protocol provides that when the terminal is in the idle state, the terminal may send a connection establishment request to the base station, and after receiving the connection establishment request, the base station triggers establishment of an air interface connection between the base station and the terminal, and the RAN between the base station and the CN device.
  • the CN is connected such that the terminal transitions from an idle state to a connected state. This process requires the establishment of an air interface connection and a RAN-CN connection, which results in a longer waiting time for communication between the base station and the terminal.
  • the base station when the base station receives the connection request sent by the terminal, the base station can multiplex/reuse the established RAN-CN connection, that is, it does not need to re-establish the RAN-CN connection, thereby facilitating the implementation of the base station and Communicate as quickly as possible between terminals.
  • the terminal may save the identifier of the terminal in an inactive state after transitioning from the inactive state to the idle state. For the identification of how to use the terminal in the inactive state, see below, and will not go into details here.
  • the terminal needs to send a state transition notification to the base station to notify the base station of the actual current state of the terminal.
  • the base station replies with a confirmation indication to the terminal to inform the terminal that the status transition notification has been successfully received.
  • the base station modifies the current state of the recorded terminal according to the state transition notification.
  • the actual current state of the terminal is synchronized with the current state of the terminal recorded by the base station, and the present application is directed to the state out-of-synchronization scenario. Based on this, the present application proposes a technical solution for determining the state out-of-synchronization. Limited to this.
  • S302 may include: when the terminal transitions from the inactive state to the idle state, and does not send a state transition notification to the base station, indicating that the state is out of synchronization, the identity of the terminal in the inactive state is saved. .
  • the terminal may not send a state transition notification to the base station after the terminal transitions from the inactive state to the idle state, where the present application knows how the terminal supports the inactive state of the base station.
  • the terminal supports the inactive state but does not send a state transition notification to the terminal after performing the transition from the inactive state to the idle state due to a failure or the like.
  • this application is not limited to this.
  • S302 may include: when the terminal transitions from an inactive state to an idle state, and fails to successfully send a state transition notification to the base station, indicating that the state is out of synchronization, the save terminal is in an inactive state.
  • logo For the terminal, if the acknowledgment indication about the state transition notification replied by the base station is not received, it is considered that the state transition notification is not successfully sent to the base station. It can be understood that the terminal fails to successfully send the state transition notification to the base station, which may include the following situations: First, the terminal has sent a state transition notification to the base station, but the base station does not receive the notification. Second, the base station has received the status transition notification sent by the terminal, but has not sent an acknowledgement indication to the terminal. Third, the base station has received the status transition notification sent by the terminal, and has replied to the terminal with an acknowledgment indication, but the acknowledgment indication has not been received by the terminal.
  • the terminal sends a connection request to the base station according to the identifier of the terminal in the inactive state.
  • the connection request may also be referred to as an RRC connection request.
  • the base station receives a connection request sent by the terminal.
  • the application does not limit the connection request sent by the terminal to the base station under what trigger condition. For example but not limited to the following two ways:
  • the terminal When the terminal needs to transmit uplink data, the terminal sends a connection request to the base station.
  • Mode 2 After receiving the RAN paging sent by the base station, the terminal sends a setup request to the base station.
  • the LTE protocol stipulates that the idle terminal only listens to CN paging, and the inactive terminal can listen to CN paging and RAN paging.
  • the base station can still send RAN paging to the terminal.
  • the terminal is currently in an idle state and cannot listen to RAN paging.
  • the present application provides a technical solution for supporting a terminal to listen to RAN paging in an idle state. This needs to consider the following two factors:
  • the terminal can recognize RAN paging in the idle state. Mainly reflected in the terminal needs to distinguish between CN paging and RAN paging in the idle state. Since the CN paging carries the identifier of the terminal in the inactive state, the CN paging carries the identifier of the terminal in the idle state. Therefore, the terminal can distinguish between the RAN paging and the CN paging according to the saved identifier of the terminal in the inactive state. For example, the identifiers of the same terminal are used in the RAN paging and the CN paging.
  • the information used in the present application is not limited to the identifier of the terminal. However, both of the pagings may carry an indication information to distinguish the two. Paging. Of course, this application is not limited to this.
  • the terminal can know the reception time of the RAN paging in the idle state.
  • the DRX configuration information may also be saved, so that the terminal can calculate the receiving time of the RAN paging according to the DRX configuration information.
  • the DRX configuration information may include, but is not limited to, a RAN configured paging DRX cycle.
  • the implementation process of the terminal calculating the reception time of the RAN paging according to the DRX configuration information may refer to the prior art.
  • the receiving time of the terminal at the RAN paging can be implemented, and the RAN paging is monitored to receive the RAN paging.
  • the method may further include: S303a-S303b, reference may be made to the foregoing S102-S104, and the application is not limited thereto.
  • the format of the connection request can be referred to below.
  • S306 The base station sends a reconfiguration activation response to the terminal, and the terminal receives the reconfiguration activation response.
  • the terminal sends an RRC connection reactivation complete message to the base station, and the base station receives the RRC connection reactivation complete message.
  • S304-S308 can be considered as a process in which the terminal and the base station are configured to be connected to the air interface, and the base station reuses the RAN-CN connection.
  • S306 to S308 reference may be made to the above, and details are not described herein again.
  • the base stations in the above S302 to S308 refer to the serving base station. 4, and the related description above with respect to FIG. 4, if the serving base station is the same as the anchor base station, after executing S304, S306 may be performed. If the serving base station is different from the anchor base station, the method may further include 305 after S304 and before S306, wherein the specific implementation of S305 may refer to S207a to S207f. It should be noted that the terminal may obtain the ID of the serving base station from the system message or obtain the ID of the serving base station from the synchronization message (such as the primary synchronization message or the secondary synchronization message).
  • the terminal may extract the ID of the anchor base station from the ID of the terminal allocated by the RAN device, and then save the ID of the anchor base station. In this way, the terminal can determine whether the serving base station and the anchor base station are the same by comparing whether the ID of the anchor base station is the same as the ID of the serving base station.
  • the terminal saves the information about the inactive state in the idle state to trigger the resume/reactive process in the inactive state.
  • the terminal in the idle state, the terminal initiates a connection process by using the identifier of the terminal in an inactive state, thereby establishing an air interface connection, and reusing the established RAN-CN connection related to the inactive state identifier.
  • the method can be applied to a state out-of-synchronization scenario, and in this scenario, the base station sends a connection establishment request from the idle state to the connected state to the base station in an idle state, so that the base station establishes an air interface connection and a RAN-CN connection.
  • the solution provided by the application helps to realize communication between the base station and the terminal as soon as possible.
  • the format of the connection request can be implemented by one of the following methods:
  • connection request multiplex connection establishment request such as an RRC connection establishment request. specific:
  • the RRC connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state. Moreover, the identifier of the terminal in the idle state is valid, and the identifier of the terminal in the inactive state may be valid or invalid.
  • the identifier of the terminal in the inactive state is invalid.
  • the identifier of the terminal in the inactive state may be set to a preset value or an invalid value. If the RAN assigns an identity to the terminal, the identity of the terminal in the inactive state is valid. Of course, this application is not limited to this. In addition, in this manner, it is considered that the CN assigns an identifier to the terminal, that is, the identifier of the terminal in the idle state is valid.
  • the RRC connection setup request message may be used to trigger S306-S308 or S305-S308 in FIG. 5; or, if the execution of S305-S308 fails, if the serving base station fails in S207b In the case, the trigger is similar to S110 to S122 in FIG. 2, as shown in FIG. 6.
  • This embodiment can be understood as: when the terminal transitions from the inactive state to the idle state, the connection process is initiated according to the identifier of the terminal in the inactive state; and in the case of failure, the connection is initiated according to the identifier of the terminal in the idle state.
  • the RRC connection establishment request carries the identifier of the terminal in the idle state and the identifier of the terminal in the inactive state, so that it can ensure that the connection process fails according to the identifier of the terminal in the inactive state.
  • the connection process is initiated according to the identifier of the terminal in the idle state in the RRC connection establishment request, thereby saving signaling overhead and facilitating communication between the base station and the terminal as soon as possible.
  • the RRC connection setup request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state. Moreover, the identifier of the terminal in the idle state is valid and the identifier of the terminal in the inactive state is invalid; or the identifier of the terminal in the idle state is invalid and the identifier of the terminal in the inactive state is valid.
  • An implementation manner in which the identifier of the terminal in the inactive state is invalid is: setting the identifier of the terminal in the inactive state in the RRC connection establishment request to a preset value or an invalid value.
  • the identifier of the terminal in the idle state is invalid.
  • the implementation manner is: setting the identifier of the terminal in the idle state in the RRC connection establishment request to a preset value or an invalid value.
  • the RRC connection setup request message may be used to trigger S110-S122 in FIG. If the identifier of the terminal in the idle state is invalid and the identifier of the terminal in the inactive state is valid, the RRC connection setup request message may be used to trigger S306-S308 or S305-S308 in FIG. 5; or, in the case where the execution of S305-S308 fails. If the serving base station fails in S207b, the triggering is similar to S110-S122 in FIG. 2, as shown in FIG. 6. Different from the mode 1, the terminal needs to carry the identifier of the terminal in the idle state in S110.
  • the RRC connection establishment request includes the identifier and the indication information of the terminal, and the identifier of the terminal is, for example but not limited to, the identifier of the terminal in an idle state or the identifier of the terminal in an inactive state or other information used to identify the terminal.
  • the indication information is used to indicate the type of connection establishment request, and different types have different functions. For example, if the indication information occupies 1 bit, if the indication information is "1", the connection establishment request can be used to trigger S110-S122 in FIG. 3; if the indication information is "0", the connection establishment request can be used to trigger the diagram. S306 to S308 or S305 to S308 in 5.
  • the indication information may also be used to indicate the type of the identifier of the terminal carried by the message. For example, if the indication information occupies 1 bit, if the indication information is "1", it indicates that the RRC connection establishment request carries the identifier of the terminal in the idle state, triggering S110 to S122 in FIG. 3; if the indication information is "0"
  • the RRC connection setup request carries the identifier of the terminal in the inactive state, and triggers S306-S308 or S305-S308 in FIG.
  • connection request is a connection recovery request, such as an RRC connection recovery request in the LTE system and the NR system, or a connection re-establishment request in the LTE system and the NR system, or an RRC connection reactivation request in the NR system or the like.
  • the connection recovery request is an RRC connection reactivation request as an example.
  • RRC connection reactivation request For the role of the RRC connection reactivation request, reference may be made to the above, and details are not described herein again.
  • the connection request is a new RRC message, that is, a new RRC message type is defined in the present application.
  • the new RRC message includes the identity of the terminal in the idle state and the identity of the terminal in the inactive state. For related description, refer to mode 1 or mode 2 in (1) above.
  • the new RRC message includes an identifier and an indication information field of the terminal. For related description, refer to mode 3 in (1) above.
  • the present application provides the following embodiments:
  • an effective time is set for the terminal to maintain the validity of the saved "identity of the terminal in an inactive state" in the idle state.
  • the effective time may be preset in the terminal, or may be notified to the terminal by the base station by using a signaling manner, such as RRC signaling.
  • the present application does not limit the size and determination manner of the duration of the effective time.
  • the terminal may delete the identifier of the terminal in the inactive state when the terminal ends/after the validity time of the identifier of the inactive state.
  • a timer may be set in the terminal, and the timer may start timing from transitioning to the idle state, and discard the identifier of the terminal in the inactive state when the valid time ends/after, thereby saving the storage resource of the terminal.
  • S302 can be implemented as: when the terminal transitions from the inactive state to the idle state, and the identifier of the terminal in the inactive state is within the valid time, the identifier of the terminal in the inactive state is saved. .
  • the base station may configure a periodic RAN-based notification area update (RNAU) or a periodic RAN-based location area update for the inactive terminal ( RAN-based location area update, RLAU).
  • RNAU periodic RAN-based notification area update
  • RLAU periodic RAN-based location area update
  • the validity of the identity of the terminal in the inactive state can be updated when the RNAU is successfully completed, and if it fails, the terminal switches to the idle state; of course, the terminal can also adopt any of the methods provided above. Switch to idle state.
  • the periodic RNAU can be configured for the inactive terminal, and then the current state of the terminal can be recorded as an idle state after the periodic RNAU timeout, thereby achieving state synchronization.
  • the present application provides a way to set the effective time of the identification of the terminal in the inactive state.
  • the period of the RNAU is T1
  • the effective time is T2 as an example
  • the terminal when the terminal removes the identifier-related RNA of the terminal in the inactive state, the terminal may delete the identifier of the terminal in the inactive state, thereby saving the storage resource of the terminal.
  • the RNA if the identifier of the terminal in the inactive state is allocated by the device in the certain RNA, the RNA is the RNA related to the identification of the terminal in the inactive state.
  • the application does not limit how the terminal determines whether to remove a certain RNA in an idle state. For example, the terminal may save the cell information corresponding to the RNA after transitioning from the inactive state to the idle state. In this way, the terminal can determine whether the terminal has removed the RNA according to the cell information corresponding to the RNA.
  • the cell information corresponding to the RNA may include, but is not limited to, a cell list corresponding to the RNA. It can be understood that, after the terminal moves out of the identifier-related RNA of the terminal in the inactive state, the terminal can also delete the cell information corresponding to the RNA, thereby further saving the storage resource of the terminal.
  • each network element such as a base station or a terminal.
  • each network element such as a base station or a terminal.
  • it includes hardware structures and/or software modules corresponding to the execution of the respective functions.
  • the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
  • the embodiment of the present application may divide a function module into a base station or a terminal according to the foregoing method example.
  • each function module may be divided according to each function, or two or more functions may be integrated into one processing module.
  • the above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions.
  • the embodiment of the present application further provides an information transmission device, which may be a terminal.
  • the terminal can be used to perform the steps performed by the terminal in FIG. Figure 6 shows a simplified schematic diagram of the terminal structure. It is convenient for understanding and illustration.
  • the terminal uses a mobile phone as an example.
  • the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device.
  • the processor is mainly used for processing communication protocols and communication data, and controlling terminals, executing software programs, processing data of software programs, and the like.
  • Memory is primarily used to store software programs and data.
  • the RF circuit is mainly used for the conversion of the baseband signal and the RF signal and the processing of the RF signal.
  • the antenna is mainly used to transmit and receive RF signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user. It should be noted that some types of terminals may not have input and output devices.
  • the processor When the data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data.
  • the memory may also be referred to as a storage medium or a storage device or the like.
  • the memory may be independent of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
  • the antenna and the radio frequency circuit having the transceiving function can be regarded as the transceiving unit of the terminal, and the processor having the processing function can be regarded as the processing unit of the terminal.
  • the terminal includes a transceiver unit 701 and a processing unit 702.
  • the transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like.
  • the processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 701 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 701 is regarded as a sending unit, that is, the transceiver unit 701 includes a receiving unit and a sending unit.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit or the like.
  • the transmitting unit may also be referred to as a transmitter, a transmitter, or a transmitting circuit, and the like.
  • the processing unit 702 is configured to determine an identity of the terminal in an inactive state when the terminal is in an idle state, and/or other steps in the application.
  • the transceiver unit 701 is configured to perform the steps performed by the terminal in S304 in FIG. 5, and/or other steps in the present application.
  • the apparatus may further include: the storage unit 703 for performing S302 in FIG. 5, and/or other steps in the application.
  • the embodiment of the present application further provides an information transmission device.
  • the information transmission device can be a base station.
  • Figure 8 shows a schematic diagram of a simplified base station structure.
  • the base station includes a 801 part and an 802 part.
  • the 801 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; the 802 part is mainly used for baseband processing and control of base stations.
  • Section 801 can be generally referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver.
  • the 802 portion is typically the control center of the base station and may be referred to as a processing unit for controlling the base station to perform the steps performed by the base station (i.e., the serving base station) of FIG. 5 above.
  • a processing unit for controlling the base station to perform the steps performed by the base station (i.e., the serving base station) of FIG. 5 above.
  • the transceiver unit of the 801 part which may also be called a transceiver, or a transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing.
  • the device for implementing the receiving function in the 801 part may be regarded as a receiving unit
  • the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the 801 portion includes a receiving unit and a transmitting unit.
  • the receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc.
  • the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.
  • the 802 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and for base stations control. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device.
  • the transceiver unit is operative to perform the steps performed by the serving base station in S304 of FIG. 3, and/or other steps in the application.
  • the processing unit is operative to perform the steps of the processing performed by the serving base station in S305, and/or other steps in the application.
  • the above embodiments it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof.
  • a software program it 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 instructions.
  • the computer program instructions When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.).
  • the computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media.
  • the usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.
  • a magnetic medium eg, a floppy disk, a hard disk, a magnetic tape
  • an optical medium eg, a DVD
  • a semiconductor medium such as a solid state disk (SSD)

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Abstract

Disclosed are a communication method and apparatus, relating to the technical field of communications. In particular, provided is a technical solution of establishing a connection between a base station and a terminal. The method can comprise: a terminal in an idle state determining an identifier of the terminal in a non-active state; and the terminal initiating a connection procedure according the identifier of the terminal in a non-active state. The technical solution can be applied to a state desynchronisation scenario.

Description

一种通信方法和装置Communication method and device
本申请要求于2017年05月24日提交中国专利局、申请号为201710374520.2、申请名称为“一种通信方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No. No. No. No. No.
技术领域Technical field
本申请实施例涉及通信技术领域，尤其涉及一种通信方法和装置。The embodiments of the present application relate to the field of communications technologies, and in particular, to a communication method and apparatus.
背景技术Background technique
5G通信***中引入了非激活(inactive)态的概念。非激活态是处于连接(connected)态和空闲(idle)态之间的状态。在终端从非激活态转换至空闲态之后，可能存在基站所记录的该终端的当前状态是非激活态的情况。在这种情况下，现有技术中还未提出终端与基站之间如何建立连接的技术方案。The concept of inactive state is introduced in 5G communication systems. The inactive state is a state between a connected state and an idle state. After the terminal transitions from the inactive state to the idle state, there may be a case where the current state of the terminal recorded by the base station is inactive. In this case, the prior art has not proposed a technical solution for how to establish a connection between a terminal and a base station.
发明内容Summary of the invention
本申请提供一种通信方法和装置，具体的，提供了一种基站与终端之间建立连接的技术方案，可以应用于但不限于状态失步场景中。The present application provides a communication method and apparatus, and in particular, provides a technical solution for establishing a connection between a base station and a terminal, which can be applied to, but not limited to, a state out-of-synchronization scenario.
第一方面，本申请提供了一种通信方法和装置。In a first aspect, the present application provides a communication method and apparatus.
在一种可能的设计中，该方法可以包括：处于空闲态的终端确定该终端在非激活态的标识；该终端根据该终端在非激活态的标识，发起连接流程。其中，终端处于空闲态之前的最近一个状态是非激活态，终端所确定的该终端在非激活态的标识即为该终端在该最近一个状态(即非激活态)的标识。该技术方案中，终端在空闲态下，可以通过该终端在非激活态的标识发起连接流程，这样，可以使得基站建立空口连接，并重用已建立的与该非激活态的标识相关的RAN-CN连接。其中，RAN是无线接入网(radio access network)的英文缩写。CN是核心网(core network，CN)的英文缩写。终端在非激活态的标识可以是长期演进(long term evolution，LTE)***中的resume ID，或新空口(new radio，NR)***中的接入层(access stratum，AS)context ID等。In a possible design, the method may include: determining, by the terminal in an idle state, an identifier of the terminal in an inactive state; the terminal initiating a connection procedure according to the identifier of the terminal in an inactive state. The last state before the terminal is in the idle state is the inactive state, and the identifier of the terminal in the inactive state determined by the terminal is the identifier of the terminal in the latest state (ie, the inactive state). In the technical solution, when the terminal is in an idle state, the connection process may be initiated by the terminal in an inactive state, so that the base station can establish an air interface connection and reuse the established RAN associated with the inactive state identifier. CN connection. The RAN is an abbreviation of a radio access network. CN is the English abbreviation of core network (CN). The identifier of the terminal in the inactive state may be a resume ID in a long term evolution (LTE) system, or an access stratum (AS) context ID in a new radio (NR) system.
在一种可能的设计中，终端根据该终端在非激活态的标识，发起连接流程，可以包括：终端发送连接建立请求，该连接建立请求包括指示该终端在非激活态的标识的信息。该可能的设计可以认为是连接请求复用连接建立请求。当然本申请不限于此。In a possible design, the terminal initiates the connection process according to the identifier of the terminal in the inactive state, and the method may include: the terminal sends a connection establishment request, where the connection establishment request includes information indicating the identifier of the terminal in an inactive state. This possible design can be thought of as a connection request multiplexing connection setup request. Of course, this application is not limited to this.
在一种可能的设计中，终端根据该终端在非激活态的标识，发起连接流程，可以包括：终端发送连接恢复请求，该连接恢复请求包括指示该终端在非激活态的标识的信息。该可能的设计可以认为是连接请求复用连接恢复请求。当然本申请不限于此。In a possible design, the terminal initiates a connection process according to the identifier of the terminal in an inactive state, which may include: the terminal sends a connection recovery request, where the connection recovery request includes information indicating the identity of the terminal in an inactive state. This possible design can be thought of as a connection request multiplexing connection recovery request. Of course, this application is not limited to this.
在一种可能的设计中，连接建立请求/连接恢复请求包括终端在空闲态的标识和终端在非激活态的标识。可选的，连接建立请求/连接恢复请求包括终端的标识和指示信息。其中，终端的标识包括终端在空闲态的标识或终端在非激活态的标识或其他可用于指示终端的标识的信息。指示信息用于指示连接建立请求/连接恢复请求的类型或者指示所述终端的标识的类型。当然本申请不限于此。连接建立请求/连接恢复请求所包含的内容不同时，基站的处理方式可以不同，具体可参考下文。In one possible design, the connection setup request/connection recovery request includes the identity of the terminal in the idle state and the identity of the terminal in the inactive state. Optionally, the connection establishment request/connection recovery request includes the identifier and indication information of the terminal. The identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state or other information that can be used to indicate the identifier of the terminal. The indication information is used to indicate the type of connection establishment request/connection recovery request or the type indicating the identity of the terminal. Of course, this application is not limited to this. When the content of the connection establishment request/connection recovery request is different, the processing mode of the base station may be different. For details, refer to the following.
在一种可能的设计中，该方法还可以包括：当终端从非激活态转换为空闲态，保存指示该终端在非激活态的标识的信息。这样，可以支持终端在空闲态下，根据该终端在非激活态的标识发起连接流程。In one possible design, the method may further include: when the terminal transitions from the inactive state to the idle state, storing information indicating the identity of the terminal in an inactive state. In this way, the terminal can be supported in the idle state, and the connection process is initiated according to the identifier of the terminal in the inactive state.
其中，指示该终端在非激活态的标识的信息可以是该终端在非激活态的标识，或该终端在非激活态的标识的索引。可选的，本申请中定义了终端的标识的类型，该类型可以包括终端在非激活态的标识和终端在空闲态的标识等。终端的任一类型的标识的索引可以使用二进制表示。例如，可以将“1”作为终端在非激活态的标识的索引，将“0”作为终端在空闲态的标识的索引。当然本申请不限于此。The information indicating the identifier of the terminal in the inactive state may be an identifier of the terminal in an inactive state, or an index of the identifier of the terminal in an inactive state. Optionally, the type of the identifier of the terminal is defined in the application, and the type may include an identifier of the terminal in an inactive state and an identifier of the terminal in an idle state. The index of any type of identification of the terminal can be expressed in binary. For example, "1" can be used as an index of the identifier of the terminal in the inactive state, and "0" is used as the index of the identifier of the terminal in the idle state. Of course, this application is not limited to this.
在一种可能的设计中，保存终端在非激活态的标识，可以包括：当终端没有向基站发送状态转换通知，保存终端在非激活态的标识。终端从非激活态转换为了空闲态，且没有向基站发送状态转换通知，说明此时状态失步。该可选的设计可以认为是状态失步的一种实现场景，当然本申请不限于此。In a possible design, the saving of the identifier of the terminal in the inactive state may include: when the terminal does not send a state transition notification to the base station, and saves the identifier of the terminal in an inactive state. The terminal transitions from the inactive state to the idle state, and does not send a state transition notification to the base station, indicating that the state is out of synchronization at this time. This optional design can be considered as an implementation scenario in which the state is out of step, although the application is not limited thereto.
在一种可能的设计中，保存终端在非激活态的标识，可以包括：当终端没能成功向基站发送状态转换通知，保存终端在非激活态的标识。终端从非激活态转换为了空闲态，且没能成功向基站发送状态转换通知，说明此时状态失步。该可选的设计可以认为是状态失步的一种实现场景，当然本申请不限于此。In a possible design, the saving of the identifier of the terminal in the inactive state may include: when the terminal fails to send the state transition notification to the base station, the identifier of the terminal in the inactive state is saved. The terminal transitions from the inactive state to the idle state, and fails to successfully send a state transition notification to the base station, indicating that the state is out of synchronization at this time. This optional design can be considered as an implementation scenario in which the state is out of step, although the application is not limited thereto.
在一种可能的设计中，在终端根据该终端在非激活态的标识，发起连接流程之前，该方法还可以包括：终端接收基站发送的RAN寻呼消息。该可能的设计可以认为终端在基站发送的RAN寻呼消息的触发下，发起连接流程。当然本申请不限于此。例如，终端还可以在有上行数据需要发送时，发起连接流程。In a possible design, before the terminal initiates the connection process according to the identifier of the terminal in the inactive state, the method may further include: the terminal receiving the RAN paging message sent by the base station. The possible design may be that the terminal initiates a connection procedure triggered by the RAN paging message sent by the base station. Of course, this application is not limited to this. For example, the terminal may also initiate a connection process when there is uplink data to be sent.
在一种可能的设计中，在终端接收基站发送的RAN寻呼消息之前，该方法还可以包括：终端保存该终端在非激活态的非连续接收(discontinuous reception，DRX)配置信息；终端根据DRX配置信息确定RAN寻呼消息的接收时间。这样，能够支持终端在空闲态下接收RAN寻呼消息。In a possible design, before the terminal receives the RAN paging message sent by the base station, the method may further include: the terminal saves the discontinuous reception (DRX) configuration information of the terminal in an inactive state; the terminal according to the DRX The configuration information determines the time at which the RAN paging message is received. In this way, the terminal can be supported to receive the RAN paging message in the idle state.
在一种可能的设计中，保存终端在非激活态的标识，可以包括：当终端在非激活态的标识在有效时间内，保存该终端在非激活态的标识。In a possible design, the saving of the identifier of the terminal in the inactive state may include: when the identifier of the terminal in the inactive state is within the valid time, the identifier of the terminal in the inactive state is saved.
在一种可能的设计中，当终端在非激活态的标识的有效时间结束，删除该终端在非激活态的标识。这样，可以节省终端的存储资源。In a possible design, when the terminal ends in the inactive state of the identification of the inactive state, the identity of the terminal in the inactive state is deleted. In this way, the storage resources of the terminal can be saved.
在一种可能的设计中，该方法还可以包括：当终端移出该终端在非激活态的标识相关的基于无线接入网的通知区域(RAN-based notification area，RNA)，删除终端在非激活态的标识。其中，该RNA是该终端转换至空闲态时所在的RNA。这样，可以节省终端的存储资源。In a possible design, the method may further include: deleting the terminal inactive when the terminal moves out of the RN-based notification area (RNA) related to the identifier of the terminal in the inactive state. State of the logo. Wherein, the RNA is the RNA in which the terminal is switched to the idle state. In this way, the storage resources of the terminal can be saved.
在一种可能的设计中，该方法还可以包括：终端保存该终端在非激活态的标识关联的RNA对应的小区信息。其中，RNA对应的小区信息用于确定终端是否移出RNA。这样，可以支持终端在空闲态下确定是否移出RNA。In a possible design, the method may further include: the terminal saves the cell information corresponding to the RNA associated with the identifier of the terminal in the inactive state. The cell information corresponding to the RNA is used to determine whether the terminal removes the RNA. In this way, the terminal can be supported to determine whether to remove the RNA in the idle state.
相应的，本申请还提供了一种通信装置，该装置可以实现第一方面所述的通信方法。例如，该装置可以是终端，其可以通过软件、硬件、或者通过硬件执行相应的软件实现上述方法。Correspondingly, the present application also provides a communication device that can implement the communication method of the first aspect. For example, the device may be a terminal, which may implement the above method by software, hardware, or by executing corresponding software by hardware.
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持 该装置执行上述第一方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In one possible design, the apparatus can include a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the first aspect method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Additionally, the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements. The communication interface can be a transceiver.
在一种可能的设计中，该装置可以包括：处理单元和收发单元。其中，处理单元可以用于在终端处于空闲态时，确定终端在非激活态的标识。发送单元可以用于根据该终端在非激活态的标识，发起连接流程。In one possible design, the apparatus can include a processing unit and a transceiver unit. The processing unit may be configured to determine, when the terminal is in an idle state, an identifier of the terminal in an inactive state. The sending unit may be configured to initiate a connection process according to the identifier of the terminal in an inactive state.
在一种可能的设计中，收发单元具体可以用于发送连接建立请求，连接建立请求包括指示该终端在非激活态的标识的信息。In a possible design, the transceiver unit may be specifically configured to send a connection establishment request, where the connection establishment request includes information indicating the identity of the terminal in an inactive state.
在一种可能的设计中，收发单元具体可以用于发送连接恢复请求，连接恢复请求包括指示该终端在非激活态的标识的信息。In a possible design, the transceiver unit may be specifically configured to send a connection recovery request, where the connection recovery request includes information indicating the identity of the terminal in an inactive state.
在一种可能的设计中，该终端还可以包括：存储单元，用于当该终端从非激活态转换为空闲态，保存该终端在非激活态的标识。In a possible design, the terminal may further include: a storage unit, configured to save the identifier of the terminal in an inactive state when the terminal transitions from an inactive state to an idle state.
在一种可能的设计中，存储单元具体可以用于当该终端没有向基站发送状态转换通知，保存该终端在非激活态的标识。In a possible design, the storage unit may be specifically configured to: when the terminal does not send a state transition notification to the base station, save the identifier of the terminal in an inactive state.
在一种可能的设计中，存储单元具体可以用于当该终端从非激活态转换为空闲态，且该终端没能成功向基站发送状态转换通知，保存该终端在非激活态的标识。In a possible design, the storage unit may be specifically configured to: when the terminal transitions from an inactive state to an idle state, and the terminal fails to successfully send a state transition notification to the base station, and saves the identifier of the terminal in an inactive state.
在一种可能的设计中，收发单元还可以用于接收基站发送的RAN寻呼消息。可选的，存储单元还可以用于保存该终端在非激活态的DRX配置信息。处理单元还可以用于：根据所述DRX配置信息确定RAN寻呼消息的接收时间。In a possible design, the transceiver unit can also be configured to receive a RAN paging message sent by the base station. Optionally, the storage unit is further configured to save the DRX configuration information of the terminal in an inactive state. The processing unit may be further configured to: determine, according to the DRX configuration information, a reception time of the RAN paging message.
在一种可能的设计中，存储单元具体可以用于当该终端在非激活态的标识在有效时间内，保存该终端在非激活态的标识。In a possible design, the storage unit may be specifically configured to save the identifier of the terminal in an inactive state when the identifier of the terminal in the inactive state is within a valid time.
在一种可能的设计中，处理单元还可以用于：当该终端在非激活态的标识的有效时间结束，删除该终端在非激活态的标识。In a possible design, the processing unit may be further configured to delete the identifier of the terminal in an inactive state when the terminal ends in the inactive state of the identifier of the inactive state.
在一种可能的设计中，处理单元还可以用于：当该终端移出该终端在非激活态的标识相关的RNA，删除该终端在非激活态的标识。In a possible design, the processing unit may be further configured to: when the terminal moves out of the identification-related RNA of the terminal in an inactive state, delete the identifier of the terminal in an inactive state.
在一种可能的设计中，存储单元还可以用于：保存该终端在非激活态的标识关联的RNA对应的小区信息；其中，RNA对应的小区信息用于确定该终端是否移出该RNA。In a possible design, the storage unit may be further configured to: save cell information corresponding to the RNA associated with the identifier of the terminal in the inactive state; wherein the cell information corresponding to the RNA is used to determine whether the terminal removes the RNA.
第二方面，本申请提供了另一种通信方法和装置。In a second aspect, the present application provides another communication method and apparatus.
在一种可能的设计中，该方法可以包括：基站接收连接建立请求，该连接建立请求包括终端在非激活态的标识。然后，基站根据该终端在非激活态的标识，建立基站与该终端之间的空口连接，并重用基站与和核心网设备之间的连接。该技术方案中，基站在接收到连接建立请求之后，可以根据连接建立请求中的终端在非激活态的标识，建立空口连接，并重用已建立的与该非激活态的标识相关的RAN-CN连接。In a possible design, the method may include the base station receiving a connection establishment request, the connection establishment request including an identifier of the terminal in an inactive state. Then, the base station establishes an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and reuses the connection between the base station and the core network device. In the technical solution, after receiving the connection establishment request, the base station may establish an air interface connection according to the identifier of the terminal in the inactive state in the connection establishment request, and reuse the established RAN-CN related to the identifier of the inactive state. connection.
在一种可能的设计中，该方法还可以包括：基站向该终端发送RAN寻呼消息，该RAN寻呼消息用于指示该终端发送连接建立请求。In a possible design, the method may further include: the base station sending a RAN paging message to the terminal, where the RAN paging message is used to indicate that the terminal sends a connection establishment request.
相应的，本申请还提供了一种通信装置，该装置可以实现第二方面所述的通信方法。例如，该装置可以是基站，其可以通过软件、硬件、或者通过硬件执行相应的 软件实现上述方法。Correspondingly, the present application also provides a communication device, which can implement the communication method described in the second aspect. For example, the apparatus may be a base station, which may implement the above method by software, hardware, or by executing corresponding software by hardware.
在一种可能的设计中，该装置可以包括处理器和存储器。该处理器被配置为支持该装置执行上述第二方面方法中相应的功能。存储器用于与处理器耦合，其保存该装置必要的程序(指令)和数据。另外该装置还可以包括通信接口，用于支持该装置与其他网元之间的通信。该通信接口可以是收发器。In one possible design, the apparatus can include a processor and a memory. The processor is configured to support the apparatus to perform the corresponding functions of the second aspect method described above. The memory is for coupling to a processor that holds the programs (instructions) and data necessary for the device. Additionally, the apparatus can also include a communication interface for supporting communication between the apparatus and other network elements. The communication interface can be a transceiver.
在一种可能的设计中，该装置可以包括：处理单元和收发单元。其中，收发单元用于接收连接建立请求，该连接建立请求包括终端在非激活态的标识。处理单元用于根据该终端在非激活态的标识，建立基站与该终端之间的空口连接，并复用基站与和核心网设备之间的连接。In one possible design, the apparatus can include a processing unit and a transceiver unit. The transceiver unit is configured to receive a connection establishment request, where the connection establishment request includes an identifier of the terminal in an inactive state. The processing unit is configured to establish an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and multiplex the connection between the base station and the core network device.
在一种可能的设计中，收发单元还可以用于向该终端发送RAN寻呼消息，RAN寻呼消息用于指示该终端发送连接建立请求。In a possible design, the transceiver unit may be further configured to send a RAN paging message to the terminal, where the RAN paging message is used to indicate that the terminal sends a connection establishment request.
本申请还提供了一种计算机存储介质，其上储存有计算机程序(指令)，当该程序(指令)在计算机上运行时，使得计算机执行上述任一方面所述的方法。The application also provides a computer storage medium having stored thereon a computer program (instructions) that, when executed on a computer, cause the computer to perform the method of any of the above aspects.
本申请还提供了一种计算机程序产品，当其在计算机上运行时，使得计算机执行上述任一方面所述的方法。The application also provides a computer program product, when run on a computer, causing the computer to perform the method of any of the above aspects.
可以理解地，上述提供的任一种装置或计算机存储介质或计算机程序产品均用于执行上文所提供的对应的方法，因此，其所能达到的有益效果可参考下文上具体实施方式中对应的方案的有益效果，此处不再赘述。It is to be understood that any of the devices or computer storage media or computer program products provided above are used to perform the corresponding methods provided above. Therefore, the beneficial effects that can be achieved can be referred to the following embodiments. The beneficial effects of the scheme are not described here.
附图说明DRAWINGS
图1为本申请实施例提供的技术方案所适用的一种***架构的示意图；FIG. 1 is a schematic diagram of a system architecture applicable to a technical solution provided by an embodiment of the present disclosure;
图2为本申请实施例提供的技术方案所适用的一种无线接入网的示意图；2 is a schematic diagram of a radio access network to which the technical solution provided by the embodiment of the present application is applied;
图3为本申请实施例提供的LTE***中的连接建立过程的示意图；FIG. 3 is a schematic diagram of a connection establishment process in an LTE system according to an embodiment of the present disclosure;
图4为本申请实施例提供的NR***中的连接重激活过程的示意图；4 is a schematic diagram of a connection reactivation process in an NR system according to an embodiment of the present application;
图5为本申请实施例提供的一种通信方法的交互示意图；FIG. 5 is a schematic diagram of interaction of a communication method according to an embodiment of the present application;
图6为本申请实施例提供的另一种通信方法的交互示意图；FIG. 6 is a schematic diagram of interaction of another communication method according to an embodiment of the present disclosure;
图7为本申请实施例提供的一种终端的结构示意图；FIG. 7 is a schematic structural diagram of a terminal according to an embodiment of the present disclosure;
图8为本申请实施例提供的一种基站的结构示意图。FIG. 8 is a schematic structural diagram of a base station according to an embodiment of the present disclosure.
具体实施方式detailed description
本申请提供的技术方案可以应用于各种引入了终端的非激活态的通信***，例如，在现有通信***基础上引入了终端的非激活态，5G通信***，未来演进***或者多种通信融合***等等。可以包括多种应用场景，例如，机器对机器(machine to machine，M2M)、D2M、宏微通信、增强型移动互联网(enhance mobile broadband，eMBB)、超高可靠性与超低时延通信(ultra reliable&low latency communication，uRLLC)以及海量物联网通信(massive machine type communication，mMTC)等场景。这些场景可以包括但不限于：终端与终端之间的通信场景，基站与基站之间的通信场景，基站与终端之间的通信场景等。本申请实施例提供的技术方案也可以应用于5G通信***中的终端与终端之间的通信，或基站与基站之间的通信等场景中。The technical solution provided by the present application can be applied to various communication systems in which an inactive state of a terminal is introduced, for example, an inactive state of a terminal, a 5G communication system, a future evolution system, or multiple communications is introduced on the basis of an existing communication system. Converged systems and more. Can include a variety of application scenarios, such as machine to machine (M2M), D2M, macro communication, enhanced mobile broadband (eMBB), ultra high reliability and ultra low latency communication (ultra Reliable & low latency communication (uRLLC) and massive machine type communication (mMTC) scenarios. These scenarios may include, but are not limited to, a communication scenario between the terminal and the terminal, a communication scenario between the base station and the base station, a communication scenario between the base station and the terminal, and the like. The technical solution provided by the embodiment of the present application can also be applied to a scenario between a terminal and a terminal in a 5G communication system, or a communication between a base station and a base station.
图1给出了一种通信***示意图，该通信***可以包括核心网、无线接入网以及终端。无线接入网中的设备可以包括一个或多个基站。FIG. 1 shows a schematic diagram of a communication system, which may include a core network, a radio access network, and a terminal. A device in a radio access network may include one or more base stations.
以LTE***为例，核心网中的设备可以包括一个或多个移动性管理实体(mobility management entity，MME)(仅示出了一个)，与MME连接的一个或多个服务网关(serving gateway，SGW)或者PDN网关(PDN gateway，PGW)，其中，PDN是分组数据网(packet data network)的英文缩写。MME用于管理终端在基站和SGW之间的承载建立和配置，当下行数据到达核心网设备(如SGW)时触发对空闲态的终端的寻呼。SGW/PGW用于数据的路由和转发，以及用于进行用户面的服务质量(quality of service，QoS)控制。Taking the LTE system as an example, the devices in the core network may include one or more mobility management entities (MMEs) (only one shown), one or more service gateways (serving gateways) connected to the MME. SGW) or PDN gateway (PGW), where PDN is the abbreviation of packet data network. The MME is used to manage the bearer establishment and configuration between the base station and the SGW, and triggers paging of the idle terminal when the downlink data reaches the core network device (such as the SGW). The SGW/PGW is used for routing and forwarding of data, and for performing quality of service (QoS) control of the user plane.
以NR***为例，核心网中的设备可以包括接入和移动性管理功能(access and mobility management function，AMF)实体，以及用户面功能(user plane function，UPF)实体。其中，AMF实体用于管理终端在基站和UPF实体之间的承载建立和配置，当下行数据到达核心网设备(如UPF实体)时触发对空闲态的终端的寻呼。UPF实体用于数据的路由和转发，以及用于进行用户面的QoS控制。Taking the NR system as an example, devices in the core network may include access and mobility management function (AMF) entities, and user plane function (UPF) entities. The AMF entity is used to manage the bearer establishment and configuration between the base station and the UPF entity, and triggers paging of the idle terminal when the downlink data reaches the core network device (such as the UPF entity). The UPF entity is used for routing and forwarding of data, and for performing QoS control of the user plane.
图2给出了一种无线接入网的示意图，无线接入网可以包括至少一个RNA(仅示出了1个RNA)。非激活态的终端从一个RNA移动到另一个RNA时，发送位置更新(location update)请求。每一RNA可以包括一个或多个基站/小区。从对终端的作用不同的角度来讲，RNA中的基站可以包括服务基站、锚点基站以及其他基站。Figure 2 shows a schematic diagram of a radio access network, which may include at least one RNA (only one RNA is shown). An inactive terminal sends a location update request when moving from one RNA to another. Each RNA may include one or more base stations/cells. The base station in the RNA may include a serving base station, an anchor base station, and other base stations from a different perspective on the role of the terminal.
服务基站，是指非激活态的终端重选到的基站或终端在RNA内移动新接入的基站。任一基站可作为一个或多个终端的服务基站，同一终端的服务基站可以变更。终端的服务基站可理解为终端新接入的基站(即新基站或者目标基站)。A serving base station refers to a base station or terminal to which a terminal in an inactive state is reselected to move a newly accessed base station within the RNA. Any base station can serve as a serving base station for one or more terminals, and the serving base station of the same terminal can be changed. The serving base station of the terminal can be understood as a base station newly accessed by the terminal (ie, a new base station or a target base station).
锚点基站，是指配置终端从连接态转换为非激活态的基站，或保存终端的上下文(context)信息的基站。终端的锚点基站可理解为终端切换至新基站前最近一次接入的基站(即旧基站或者源基站)。An anchor base station is a base station that configures a terminal to switch from a connected state to an inactive state, or a base station that stores context information of the terminal. The anchor base station of the terminal can be understood as the base station (ie, the old base station or the source base station) that the terminal accessed the most recently before the handover to the new base station.
其他基站，是指除服务基站和锚点基站之外的基站。Other base stations refer to base stations other than the serving base station and the anchor base station.
在图2中，t1时刻，终端在基站1的覆盖范围内，并从连接态转换为了非激活态。t2时刻，该终端移动到了基站2的覆盖范围内。那么，可以认为：终端在基站2的覆盖范围时，基站1即为该终端的锚点基站，基站2即为该终端的服务基站。RNA中除该终端的锚点基站和服务基站之外的基站，对于该终端来说，即为其他基站。In Figure 2, at time t1, the terminal is within the coverage of base station 1 and transitions from the connected state to the inactive state. At time t2, the terminal moves into the coverage of the base station 2. Then, it can be considered that when the terminal is in the coverage of the base station 2, the base station 1 is the anchor base station of the terminal, and the base station 2 is the serving base station of the terminal. The base station other than the anchor base station and the serving base station of the terminal in the RNA is the other base station for the terminal.
基站(包括上文中描述的服务基站、锚点基站和/或其他基站)可以是能和终端通信的设备。基站可以是中继站或接入点等。基站可以是全球移动通信***(global system for mobile communication，GSM)或码分多址(code division multiple access，CDMA)网络中的基站收发信台(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)中的NB(NodeB)，还可以是LTE***中的eNB或eNodeB(evolutional NodeB)。基站还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器。基站还可以是5G网络中的网络设备或未来演进网络中的网络设备；还可以是可穿戴设备或车载设备等。A base station (including the serving base station, anchor base station, and/or other base station described above) may be a device capable of communicating with the terminal. The base station can be a relay station or an access point or the like. The base station may be a base transceiver station (BTS) in a global system for mobile communication (GSM) or a code division multiple access (CDMA) network, or may be a broadband code division. The NB (NodeB) in the wideband code division multiple access (WCDMA) may also be an eNB or an eNodeB (evolutional NodeB) in the LTE system. The base station may also be a wireless controller in a cloud radio access network (CRAN) scenario. The base station may also be a network device in a 5G network or a network device in a future evolved network; or may be a wearable device or an in-vehicle device.
终端可以是用户设备(user equipment，UE)、接入终端、UE单元、UE站、移动站、移动台、远方站、远程终端、移动设备、UE终端、无线通信设备、UE代理或UE装置等。其中，接入终端可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字处理(personal  digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端或者未来演进的PLMN网络中的终端等。The terminal may be a user equipment (UE), an access terminal, a UE unit, a UE station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a UE terminal, a wireless communication device, a UE proxy, or a UE device. . The access terminal may be a cellular phone, a cordless phone, a session initiation protocol (SIP) phone, a wireless local loop (WLL) station, a personal digital assistant (PDA), and A wireless communication capable handheld device, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal in a future 5G network, or a terminal in a future evolved PLMN network, or the like.
下面对本申请中涉及的部分术语及相关技术进行解释说明，以方便理解：Some of the terms and related technologies involved in this application are explained below to facilitate understanding:
1)、空口连接，RAN-CN连接1), air interface connection, RAN-CN connection
为了实现终端与网络设备之间的通信，需要建立空口连接和RAN-CN连接。In order to realize communication between the terminal and the network device, it is necessary to establish an air interface connection and a RAN-CN connection.
空口连接，是指终端与RAN设备(如基站)之间的连接。空口连接包括终端与基站之间的用户面承载，例如LTE***中的数据无线承载(data radio bearer，DRB)；以及终端与基站之间的控制面承载，例如LTE***中的信令无线承载(signal radio beare，SRB)。An air interface connection refers to a connection between a terminal and a RAN device (such as a base station). The air interface connection includes a user plane bearer between the terminal and the base station, for example, a data radio bearer (DRB) in the LTE system; and a control plane bearer between the terminal and the base station, for example, a signaling radio bearer in the LTE system ( Signal radio beare, SRB).
RAN-CN连接，是指RAN设备(如基站)与CN设备之间的连接。RAN-CN连接包括基站与CN设备之间的用户面承载，例如LTE***中的S1用户面承载；以及基站与CN设备之间的控制面承载。示例的，LTE***中，CN设备可以是SGW/PGW。在NR***中，CN设备可以是UPF实体。RAN-CN connection refers to the connection between a RAN device (such as a base station) and a CN device. The RAN-CN connection includes a user plane bearer between the base station and the CN device, such as an S1 user plane bearer in an LTE system; and a control plane bearer between the base station and the CN device. For example, in an LTE system, the CN device may be an SGW/PGW. In an NR system, a CN device may be a UPF entity.
2)、空闲态、非激活态、连接态2), idle state, inactive state, connected state
空闲态、非激活态和连接态均用于描述终端的状态。The idle state, the inactive state, and the connected state are all used to describe the state of the terminal.
处于空闲态的终端，空口的用户面承载和控制面承载，以及RAN-CN之间的用户面承载已被释放(release)。当终端发起呼叫或业务请求时，需要先建立空口的控制面承载，然后，建立RAN-CN之间的用户面承载，并在建立RAN-CN之间的用户面承载的同时配置空口的用户面承载。The terminal in the idle state, the user plane bearer and the control plane bearer of the air interface, and the user plane bearer between the RAN-CN have been released. When the terminal initiates a call or a service request, the control plane bearer of the air interface needs to be established first, then the user plane bearer between the RAN-CN is established, and the user plane of the air interface is configured while establishing the user plane bearer between the RAN-CN. Hosted.
处于非激活态的终端，空口的用户面承载已被暂停(suspend)，RAN-CN之间的用户面承载和控制面承载仍被维护。当终端发起呼叫或业务请求时，需要激活空口的用户面承载，并重用已有的RAN-CN之间的用户面承载和控制面承载。In the inactive terminal, the user plane bearer of the air interface has been suspended (suspend), and the user plane bearer and control plane bearer between the RAN-CN are still maintained. When the terminal initiates a call or a service request, the user plane bearer of the air interface needs to be activated, and the user plane bearer and control plane bearer between the existing RAN-CNs are reused.
处于连接态的终端，空口的控制面承载已被建立，且已建立默认的用户面承载(包括空口的用户面承载和RAN-CN之间的用户面承载)。如果默认的用户面承载不能满足业务的QoS需求，则建立专用的用户面承载(包括空口的用户面承载和RAN-CN之间的用户面承载)。In the connected terminal, the control plane bearer of the air interface has been established, and the default user plane bearer (including the user plane bearer of the air interface and the user plane bearer between the RAN-CN) has been established. If the default user plane bearer cannot meet the QoS requirements of the service, a dedicated user plane bearer (including the user plane bearer of the air interface and the user plane bearer between the RAN-CN) is established.
3)、状态同步，状态失步(state mismatch)3), state synchronization, state mismatch (state mismatch)
状态同步，是指终端实际的当前状态与基站所记录的终端的当前状态相同。例如，终端实际的当前状态是非激活态，基站所记录的终端的当前状态也是非激活态。State synchronization means that the actual current state of the terminal is the same as the current state of the terminal recorded by the base station. For example, the actual current state of the terminal is an inactive state, and the current state of the terminal recorded by the base station is also an inactive state.
状态失步，是指终端实际的当前状态与基站所记录的终端的当前状态不同。本申请中，状态失步主要是指终端的当前状态是空闲态，且是由非激活态转换成了空闲态，而基站所记录的终端的当前状态仍然是非激活态。The state out of synchronization means that the actual current state of the terminal is different from the current state of the terminal recorded by the base station. In the present application, the state out-of-synchronization mainly means that the current state of the terminal is an idle state, and is converted from an inactive state to an idle state, and the current state of the terminal recorded by the base station is still in an inactive state.
4)、终端在空闲态的标识，终端在非激活态的标识4), the identifier of the terminal in the idle state, and the identifier of the terminal in the inactive state
终端在空闲态的标识，是指终端在空闲态时，CN中的设备为该终端分配的标识。终端在空闲态的标识，可以被称为CN分配的终端ID(identification)，或CN维护的终端的标识。终端在空闲态的标识例如但不限于：临时移动用户标识(serving temporary mobile subscriber identity，S-TMSI)，或国际移动用户识别码(international mobile subscriber identification number，IMSI)等。The identifier of the terminal in the idle state refers to the identifier assigned by the device in the CN to the terminal when the terminal is in the idle state. The identifier of the terminal in the idle state may be referred to as the terminal ID of the CN allocation, or the identifier of the terminal maintained by the CN. The identifier of the terminal in the idle state is, for example but not limited to, a serving temporary mobile subscriber identity (S-TMSI), or an international mobile subscriber identification number (IMSI).
终端在非激活态的标识，是指终端在非激活态时，其所在的RNA中的设备为该终端分配的标识。终端的非激活态的标识，可以被称为RAN分配的终端ID，或RAN维护的终端的标识。终端在非激活态的标识例如但不限于LTE***中的resume ID或NR***中的AS context ID等。当然本申请不限于此。终端可以从一个RNA移动至另一个RNA，终端在不同RNA时，该终端的非激活态的标识不同。The identifier of the terminal in the inactive state refers to the identifier assigned by the device in the RNA in which the terminal is located in the inactive state. The identifier of the inactive state of the terminal may be referred to as the terminal ID assigned by the RAN or the identifier of the terminal maintained by the RAN. The identifier of the terminal in the inactive state is, for example but not limited to, the resume ID in the LTE system or the AS context ID in the NR system. Of course, this application is not limited to this. The terminal can move from one RNA to another, and when the terminal is in different RNAs, the identification of the inactive state of the terminal is different.
在本申请的一些实施例中，定义了终端的标识的类型，该类型可以包括：终端在非激活态的标识、终端在空闲态的标识等。In some embodiments of the present application, the type of the identifier of the terminal is defined, and the type may include: an identifier of the terminal in an inactive state, an identifier of the terminal in an idle state, and the like.
5)、RAN paging，CN paging5), RAN paging, CN paging
RAN paging，即RAN寻呼消息或RAN触发的寻呼消息，其也可以被称为RAN-initiated paging或RAN-based notification。CN paging，即CN寻呼消息或CN触发的寻呼消息，其也可以被称为CN-initiated paging。RAN paging, ie RAN paging message or RAN triggered paging message, which may also be referred to as RAN-initiated paging or RAN-based notification. CN paging, which is a CN paging message or a CN triggered paging message, which may also be referred to as CN-initiated paging.
RAN paging和CN paging可以例如但不限于在网络侧有下行数据需要发送或者***消息发生改变等情况下，发送的寻呼消息，用于在一定区域内找到终端。其中，RAN paging和CN paging的触发实体不同。在RAN paging是由基站触发的。LTE***中，CN paging是由MME触发的；NR***中，CN paging是由AMF实体触发的。另外，RAN paging和CN paging作用的区域范围也不同。The RAN paging and the CN paging may be, for example but not limited to, a paging message sent in the case where the downlink data needs to be transmitted or the system message is changed on the network side, and is used to find the terminal in a certain area. Among them, the triggering entities of RAN paging and CN paging are different. The RAN paging is triggered by the base station. In the LTE system, CN paging is triggered by the MME; in the NR system, CN paging is triggered by the AMF entity. In addition, the range of regions in which RAN paging and CN paging act is also different.
6)、其他术语6), other terms
本文中的术语“多个”是指两个或两个以上。The term "plurality" as used herein refers to two or more.
本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本文中字符“/”，一般表示前后关联对象是一种“或”的关系。The term "and/or" in this context is merely an association describing the associated object, indicating that there may be three relationships, for example, A and / or B, which may indicate that A exists separately, and both A and B exist, respectively. B these three situations. In addition, the character "/" in this article generally indicates that the contextual object is an "or" relationship.
图3给出了LTE***中的连接建立过程的示意图。具体的，给出了LTE***中，终端从空闲态转换为连接态的过程的示意图。该过程包括：Figure 3 shows a schematic diagram of the connection establishment process in an LTE system. Specifically, a schematic diagram of a process in which a terminal transitions from an idle state to a connected state in an LTE system is given. The process includes:
S102：终端向服务基站发送随机接入信道(random access channel，RACH)前导(preamble)。服务基站接收终端发送的该RACH preamble，并在接收到该RACH preamble之后，为该终端分配上行资源。其中，该上行资源可以包括终端发送上行数据和/或上行信令(例如但不限于RRC连接建立请求)所使用的上行资源。S102: The terminal sends a random access channel (RACH) preamble to the serving base station. The serving base station receives the RACH preamble sent by the terminal, and after receiving the RACH preamble, allocates an uplink resource to the terminal. The uplink resource may include an uplink resource used by the terminal to send uplink data and/or uplink signaling, such as but not limited to an RRC connection setup request.
终端可以在有发送业务请求的需求的情况下，执行S102。The terminal may execute S102 if there is a demand to send a service request.
S104：服务基站向终端发送随机接入响应，其中，随机接入响应包括指示上行资源的信息。终端接收服务基站发送的随机接入响应。S104: The serving base station sends a random access response to the terminal, where the random access response includes information indicating the uplink resource. The terminal receives a random access response sent by the serving base station.
上述S102～S104可以认为是随机接入过程，该过程中还可以包括其他步骤，本申请对此不再详述。The foregoing S102-S104 can be regarded as a random access process, and other steps can be included in the process, which is not detailed in this application.
S106：终端向服务基站发送RRC连接建立请求。其中，RRC连接建立请求包括终端在空闲态的标识等。服务基站接收终端发送的该RRC连接建立请求，并在接收到该RRC连接建立请求之后，生成该终端的SRB1配置信息，然后执行S108。S106: The terminal sends an RRC connection establishment request to the serving base station. The RRC connection establishment request includes an identifier of the terminal in an idle state, and the like. The serving base station receives the RRC connection setup request sent by the terminal, and after receiving the RRC connection setup request, generates SRB1 configuration information of the terminal, and then performs S108.
可以理解的，基站与终端之间可以建立多个SRB，其中，基站和终端使用SRB1对发送的RRC信令进行完整性保护和加密保护。It can be understood that a plurality of SRBs can be established between the base station and the terminal, wherein the base station and the terminal use SRB1 to perform integrity protection and encryption protection on the transmitted RRC signaling.
S108：服务基站向终端发送RRC连接建立响应，其中，该RRC连接建立响应包括该终端的SRB1配置信息。终端接收服务基站发送的该连接建立响应，并根据SRB1 配置信息配置SRB1，然后执行S110。S108: The serving base station sends an RRC connection setup response to the terminal, where the RRC connection setup response includes SRB1 configuration information of the terminal. The terminal receives the connection setup response sent by the serving base station, and configures SRB1 according to the SRB1 configuration information, and then performs S110.
上述S106～S108可以认为是终端和服务基站之间建立空口的SRB1的过程，该过程还可以包括其他步骤，本申请对此不再详述。至此，可以认为终端进入了连接态。The foregoing S106-S108 may be considered as a process of establishing an air interface SRB1 between the terminal and the serving base station, and the process may further include other steps, which are not described in detail in this application. At this point, the terminal can be considered to have entered the connected state.
S110：终端向服务基站发送RRC连接建立完成消息，其中，RRC连接建立完成消息包括业务请求。RRC连接建立完成消息一方面用于通知服务基站该终端已配置SRB1，另一方面用于服务基站建立满足业务请求的上下文信息。服务基站接收终端发送的RRC连接建立完成消息，然后执行S112。S110: The terminal sends an RRC connection setup complete message to the serving base station, where the RRC connection setup complete message includes a service request. The RRC Connection Setup Complete message is used to notify the serving base station that the terminal has configured SRB1 on the one hand, and the serving base station to establish context information that satisfies the service request. The serving base station receives the RRC connection setup complete message sent by the terminal, and then performs S112.
S112：服务基站向MME发送上下文建立请求，其中，上下文建立请求包括业务请求。MME接收服务基站发送的上下文建立请求，并建立满足上下文建立请求包括的业务请求的上下文信息，然后执行S114。S112: The serving base station sends a context establishment request to the MME, where the context establishment request includes a service request. The MME receives the context establishment request sent by the serving base station, and establishes context information that satisfies the service request included in the context establishment request, and then performs S114.
S114：MME向服务基站发送上下文建立完成消息，以通知服务基站MME已建立满足业务请求的上下文信息。服务基站接收MME发送的上下文建立完成消息。S114: The MME sends a context setup complete message to the serving base station to notify the serving base station that the MME has established context information that satisfies the service request. The serving base station receives a context establishment complete message sent by the MME.
上述S110～S114可以认为是在网络侧建立终端的上下文信息的过程，该过程还可以包括其他步骤，本申请对此不再详述。The foregoing S110-S114 may be considered as a process of establishing context information of the terminal on the network side, and the process may further include other steps, which are not described in detail in this application.
S116：服务基站生成DRB以及其他SRB的配置信息，然后向终端发送包含DRB和其他SRB的配置信息的RRC连接重配消息。终端接收服务基站发送的RRC连接重配消息，并根据DRB和其他SRB的配置信息配置DRB和其他SRB。S116: The serving base station generates configuration information of the DRB and other SRBs, and then sends an RRC connection reconfiguration message including configuration information of the DRB and other SRBs to the terminal. The terminal receives the RRC connection reconfiguration message sent by the serving base station, and configures the DRB and other SRBs according to the configuration information of the DRB and other SRBs.
S118：终端向服务基站发送RRC连接重配完成消息，以通知服务基站该终端已配置DRB和其他SRB。服务基站接收终端发送的RRC连接重配完成消息。S118: The terminal sends an RRC connection reconfiguration complete message to the serving base station to notify the serving base station that the terminal has configured the DRB and other SRBs. The serving base station receives an RRC connection reconfiguration complete message sent by the terminal.
上述S116～S118可以认为是建立空口的DRB以及其他SRB的过程，该过程还可以包括其他步骤，本申请对此不再详述。The foregoing S116-S118 may be considered as a process of establishing an air interface DRB and other SRBs, and the process may further include other steps, which are not detailed in this application.
S120：MME向SGW/PGW发送修改承载请求。SGW/PGW接收该修改承载请求，并建立满足业务请求的需求的RAN-CN之间的用户面承载，然后执行S122。S120: The MME sends a modify bearer request to the SGW/PGW. The SGW/PGW receives the modified bearer request, and establishes a user plane bearer between the RAN-CNs that meets the requirements of the service request, and then executes S122.
S122：SGW/PGW向MME发送修改承载响应，MME接收该修改承载响应。S122: The SGW/PGW sends a modify bearer response to the MME, and the MME receives the modified bearer response.
上述S120～S122可以认为是建立RAN-CN之间的用户面承载的过程，该过程还可以包括其他步骤，本申请对此不再详述。The foregoing S120-S122 may be considered as a process of establishing a user plane bearer between the RAN-CN, and the process may further include other steps, which are not detailed in this application.
图4给出了NR***中的连接重激活(re-active/resume)的过程的示意图，具体的，给出了NR***中，终端从非激活态转换为连接态的过程的示意图。该过程包括：Figure 4 shows a schematic diagram of the process of re-active/resume in the NR system. Specifically, a schematic diagram of the process of the terminal transitioning from the inactive state to the connected state in the NR system is given. The process includes:
S202～S204：可参考S102～S104，本申请不限于此。S202 to S204: Reference may be made to S102 to S104, and the present application is not limited thereto.
S206：终端向服务基站发送RRC连接重激活请求。RRC连接重激活请求包括终端在非激活态的标识。服务基站接收终端发送的RRC连接重激活请求，并读取本地存储的该终端的上下文信息，然后激活空口的用户面承载和控制面承载。S206: The terminal sends an RRC connection reactivation request to the serving base station. The RRC Connection Reactivation Request includes an identity of the terminal in an inactive state. The serving base station receives the RRC connection reactivation request sent by the terminal, and reads the locally stored context information of the terminal, and then activates the user plane bearer and the control plane bearer of the air interface.
S208：服务基站向终端回复RRC连接重激活响应，以指示终端激活空口的用户面承载和控制面承载。终端接收服务基站发送的RRC连接重激活响应，然后激活空口的用户面承载和控制面承载。S208: The serving base station returns an RRC connection reactivation response to the terminal, to instruct the terminal to activate the user plane bearer and the control plane bearer of the air interface. The terminal receives the RRC connection reactivation response sent by the serving base station, and then activates the user plane bearer and control plane bearer of the air interface.
S210：终端向服务基站发送RRC连接重激活完成消息，以通知服务基站该终端已激活空口的用户面承载和控制面承载。服务基站接收终端发送的RRC连接重配置完成消息。S210: The terminal sends an RRC connection reactivation complete message to the serving base station to notify the serving base station that the terminal has activated the user plane bearer and the control plane bearer of the air interface. The serving base station receives an RRC connection reconfiguration complete message sent by the terminal.
可选的，若服务基站与锚点基站不同，则该服务基站可以从锚点基站获取该终端 的上下文信息，从而完成锚点基站的转换，具体可以通过在S206之后S208之前执行以下步骤S207a～S207b完成锚点基站的转换。相应的，RAN-CN连接可以通过路径切换(path switch)从锚点基站转切换到服务基站，具体可以通过执行以下步骤S207c～S207f完成路径切换。可以理解的，若服务基站与锚点基站相同，则可以不执行S207a～S207f。Optionally, if the serving base station is different from the anchor base station, the serving base station may obtain the context information of the terminal from the anchor base station, so as to complete the conversion of the anchor base station, specifically, the following step S207a may be performed before S208 after S206. S207b completes the conversion of the anchor base station. Correspondingly, the RAN-CN connection can be switched from the anchor base station to the serving base station by using a path switch. Specifically, the path switching can be completed by performing the following steps S207c to S207f. It can be understood that if the serving base station is the same as the anchor base station, S207a to S207f may not be executed.
S207a：服务基站向锚点基站发送上下文请求，用于请求该终端的上下文信息。锚点基站接收服务基站发送的上下文请求，然后执行S207b。S207a: The serving base station sends a context request to the anchor base station to request context information of the terminal. The anchor base station receives the context request sent by the serving base station, and then performs S207b.
S207b：锚点基站向服务基站发送上下文响应，其中，上下文响应包括该终端的上下文信息。服务基站接收终端发送的上下文响应，并保存该终端的上下文信息，然后执行S207c。S207b: The anchor base station sends a context response to the serving base station, where the context response includes context information of the terminal. The serving base station receives the context response sent by the terminal, and saves the context information of the terminal, and then performs S207c.
S207c：服务基站向AMF实体发送路径切换请求，其中，路径切换请求用于请求将锚点基站切换到服务基站。AMF实体接收服务基站发送的路径切换请求，然后执行S207d。其中，AMF实体用于控制UPF实体执行路径转换。S207c: The serving base station sends a path switch request to the AMF entity, where the path switch request is used to request to switch the anchor base station to the serving base station. The AMF entity receives the path switch request sent by the serving base station, and then performs S207d. The AMF entity is used to control the UPF entity to perform path conversion.
S207d：AMF实体向UPF实体发送修改承载请求。UPF实体接收AMF实体发送的修改承载请求，并将RAN-CN连接从UPF实体与锚点基站之间，切换至UPF实体与服务基站之间。然后执行S207e。S207d: The AMF entity sends a modify bearer request to the UPF entity. The UPF entity receives the modified bearer request sent by the AMF entity, and switches the RAN-CN connection from between the UPF entity and the anchor base station to the UPF entity and the serving base station. Then S207e is executed.
S207e：UPF实体向AMF实体发送修改承载响应。S207e: The UPF entity sends a modify bearer response to the AMF entity.
S207f：AMF实体向服务基站发送路径切换响应。S207f: The AMF entity sends a path switch response to the serving base station.
下面从通信方法的角度对本申请提供的技术方案进行描述。需要说明的是，如果不加说明，则下文中所描述的基站是指终端的服务基站。The technical solution provided by the present application is described below from the perspective of a communication method. It should be noted that, unless otherwise stated, the base station described hereinafter refers to the serving base station of the terminal.
图5给出了本申请提供的一种通信方法的交互示意图。该方法包括：FIG. 5 is a schematic diagram showing the interaction of a communication method provided by the present application. The method includes:
S302：终端从非激活态转换为空闲态，并保存该终端在非激活态的标识。S302: The terminal transitions from an inactive state to an idle state, and saves the identifier of the terminal in an inactive state.
终端可以自发地(autonomously)从非激活态转换为空闲态，即由终端自身触发使得该终端从非激活态转换为空闲态。例如但不限于以下任一种：终端在非激活态下丢失小区覆盖，例如终端接收到的小区信号的强度低于某一预设阀值且持续一段时间则认为丢失小区覆盖，则转换为空闲态；终端多次发送RRC信令失败后，从非激活态转换为空闲态。另外，终端还可以在其他网络设备(即除基站之外的网络设备)或其他终端触发下，从非激活态转换为空闲态。当然本申请不限于此。The terminal can autonomously transition from the inactive state to the idle state, that is, the terminal itself triggers the terminal to transition from the inactive state to the idle state. For example, but not limited to any of the following: the terminal loses cell coverage in an inactive state, for example, if the strength of the cell signal received by the terminal is lower than a certain threshold and continues to be lost for a period of time, the cell is considered to be idle. State; after the terminal fails to send RRC signaling multiple times, it transitions from an inactive state to an idle state. In addition, the terminal can also be switched from an inactive state to an idle state triggered by other network devices (ie, network devices other than the base station) or other terminals. Of course, this application is not limited to this.
LTE协议中规定，终端在非激活态时，会保存该终端在非激活态的相关信息，并在非激活态转换为空闲态后，删除该终端在非激活态的相关信息。基站在所记录的终端的当前状态是非激活态时，会保存该终端在非激活态的相关信息，并在所记录的终端的当前状态从非激活态转换为空闲态后，删除该终端在非激活态的相关信息。其中，终端在非激活态的相关信息包括但不限于以下至少一种：终端在非激活态的标识，终端在非激活态的DRX配置信息，终端所在RNA对应的小区信息例如小区列表等。The LTE protocol stipulates that when the terminal is in the inactive state, it saves the relevant information of the terminal in the inactive state, and deletes the related information of the terminal in the inactive state after the inactive state is converted to the idle state. When the current state of the recorded terminal is inactive, the base station saves related information of the terminal in an inactive state, and deletes the terminal in the non-active state after the current state of the recorded terminal is changed from the inactive state to the idle state. Information about the active state. The related information of the terminal in the inactive state includes, but is not limited to, at least one of the following: the identifier of the terminal in the inactive state, the DRX configuration information of the terminal in the inactive state, and the cell information corresponding to the RNA of the terminal, such as the cell list.
LTE协议中规定，终端在空闲态时，可以向基站发送连接建立请求，基站接收到连接建立请求后，触发建立该基站与终端之间的空口连接，以及该基站与CN设备之间的RAN-CN连接，从而使得终端从空闲态转换为连接态。该过程需要建立空口连接和RAN-CN连接，这会造成基站与终端之间通信需要等待的时间较长。The LTE protocol provides that when the terminal is in the idle state, the terminal may send a connection establishment request to the base station, and after receiving the connection establishment request, the base station triggers establishment of an air interface connection between the base station and the terminal, and the RAN between the base station and the CN device. The CN is connected such that the terminal transitions from an idle state to a connected state. This process requires the establishment of an air interface connection and a RAN-CN connection, which results in a longer waiting time for communication between the base station and the terminal.
基于此，为了实现状态失步下，基站接收到终端发送的连接请求时，可以复 用/重用已建立的RAN-CN连接，即不需要重新建立RAN-CN连接，从而有助于实现基站与终端之间尽快通信。在本申请提供的一些实施例中，终端可以在从非激活态转换为空闲态后，保存该终端在非激活态的标识。关于如何使用终端在非激活态的标识，可参见下文，此处不再赘述。Based on this, in order to implement the state out-of-synchronization, when the base station receives the connection request sent by the terminal, the base station can multiplex/reuse the established RAN-CN connection, that is, it does not need to re-establish the RAN-CN connection, thereby facilitating the implementation of the base station and Communicate as quickly as possible between terminals. In some embodiments provided by the present application, the terminal may save the identifier of the terminal in an inactive state after transitioning from the inactive state to the idle state. For the identification of how to use the terminal in the inactive state, see below, and will not go into details here.
一般地，终端在进行状态转换之后，需要向基站发送状态转换通知，以通知基站该终端实际的当前状态。基站接收到状态转换通知之后，会向终端回复确认指示，以告知终端状态转换通知已接收成功。并且，基站会根据状态转换通知修改所记录的终端的当前状态。这样，终端实际的当前状态与基站所记录的该终端的当前状态同步，而本申请是针对状态失步场景提出的，基于此，本申请提出了确定状态失步的技术方案，当然本申请不限于此。Generally, after the state transition is performed, the terminal needs to send a state transition notification to the base station to notify the base station of the actual current state of the terminal. After receiving the status transition notification, the base station replies with a confirmation indication to the terminal to inform the terminal that the status transition notification has been successfully received. And, the base station modifies the current state of the recorded terminal according to the state transition notification. In this way, the actual current state of the terminal is synchronized with the current state of the terminal recorded by the base station, and the present application is directed to the state out-of-synchronization scenario. Based on this, the present application proposes a technical solution for determining the state out-of-synchronization. Limited to this.
下面结合S302的具体实现来描述本申请所提出的确定状态失步的技术方案。The technical solution for determining the state out-of-synchronization proposed in the present application is described below in conjunction with the specific implementation of S302.
在本申请的一些实施例中，S302可以包括：当终端从非激活态转换为空闲态，且没有向基站发送状态转换通知，说明：已满足状态失步，则保存终端在非激活态的标识。示例的，若基站不支持非激活态，则该终端从非激活态转换为空闲态后，可以不向基站发送状态转换通知，其中，本申请对终端如何获知基站是否支持非激活态的实现方式不进行限定。又如，终端支持非激活态但因故障等原因在执行从非激活态转换为空闲态后，没有向终端发送状态转换通知。当然本申请不限于此。In some embodiments of the present application, S302 may include: when the terminal transitions from the inactive state to the idle state, and does not send a state transition notification to the base station, indicating that the state is out of synchronization, the identity of the terminal in the inactive state is saved. . For example, if the base station does not support the inactive state, the terminal may not send a state transition notification to the base station after the terminal transitions from the inactive state to the idle state, where the present application knows how the terminal supports the inactive state of the base station. Not limited. For another example, the terminal supports the inactive state but does not send a state transition notification to the terminal after performing the transition from the inactive state to the idle state due to a failure or the like. Of course, this application is not limited to this.
在本申请的一些实施例中，S302可以包括：当终端从非激活态转换为空闲态，且没能成功向基站发送状态转换通知，说明：已满足状态失步，则保存终端在非激活态的标识。对于终端而言，若没有接收到基站回复的关于状态转换通知的确认指示，则认为没能成功向基站发送状态转换通知。可以理解的，终端没能成功向基站发送状态转换通知可以包括以下几种情况：第一，终端已向基站发送状态转换通知，但是基站没有接收到。第二，基站已接收到终端发送的状态转换通知，但是没有向终端发送确认指示。第三，基站已接收到终端发送的状态转换通知，且已向终端回复确认指示，但是该确认指示没有被终端接收到。In some embodiments of the present application, S302 may include: when the terminal transitions from an inactive state to an idle state, and fails to successfully send a state transition notification to the base station, indicating that the state is out of synchronization, the save terminal is in an inactive state. Logo. For the terminal, if the acknowledgment indication about the state transition notification replied by the base station is not received, it is considered that the state transition notification is not successfully sent to the base station. It can be understood that the terminal fails to successfully send the state transition notification to the base station, which may include the following situations: First, the terminal has sent a state transition notification to the base station, but the base station does not receive the notification. Second, the base station has received the status transition notification sent by the terminal, but has not sent an acknowledgement indication to the terminal. Third, the base station has received the status transition notification sent by the terminal, and has replied to the terminal with an acknowledgment indication, but the acknowledgment indication has not been received by the terminal.
S304：终端根据终端在非激活态的标识，向基站发送连接请求。其中，连接请求也可以被称为RRC连接请求。基站接收终端发送的连接请求。S304: The terminal sends a connection request to the base station according to the identifier of the terminal in the inactive state. The connection request may also be referred to as an RRC connection request. The base station receives a connection request sent by the terminal.
本申请对终端在何种触发条件下向基站发送连接请求不进行限定。例如但不限于以下两种方式：The application does not limit the connection request sent by the terminal to the base station under what trigger condition. For example but not limited to the following two ways:
方式1、终端在有上行数据需要发送时，向基站发送连接请求。 Mode 1. When the terminal needs to transmit uplink data, the terminal sends a connection request to the base station.
方式2、终端在接收到基站发送的RAN paging后，向基站发送建立请求。Mode 2: After receiving the RAN paging sent by the base station, the terminal sends a setup request to the base station.
LTE协议中规定，空闲态的终端仅监听CN paging，非激活态的终端可监听CN paging以及RAN paging。根据上文中的描述可知，本申请中，虽然终端实际的当前状态是空闲态，但是基站所记录的该终端的当前状态是非激活态，因此，基站仍然可以向终端发送RAN paging。然而，终端当前处于空闲态，不能监听RAN paging。为此，本申请提供了一种支持终端在空闲态下监听RAN paging的技术方案。这需要考虑如下两方面因素：The LTE protocol stipulates that the idle terminal only listens to CN paging, and the inactive terminal can listen to CN paging and RAN paging. According to the above description, in the present application, although the actual current state of the terminal is an idle state, the current state of the terminal recorded by the base station is an inactive state, and therefore, the base station can still send RAN paging to the terminal. However, the terminal is currently in an idle state and cannot listen to RAN paging. To this end, the present application provides a technical solution for supporting a terminal to listen to RAN paging in an idle state. This needs to consider the following two factors:
第一，终端在空闲态下，能够识别RAN paging。主要体现在终端需要在空闲态下，区分CN paging和RAN paging。由于CN paging中携带终端在非激活态的 标识，CN paging中携带终端在空闲态的标识，因此，终端根据所保存的该终端在非激活态的标识，可区分RAN paging和CN paging。又如，RAN paging和CN paging中使用相同的终端的标识，本申请对具体使用哪些信息作为终端的标识不进行限定，但是，这两个paging中可以均携带一指示信息，以区分这两个paging。当然本申请不限于此。First, the terminal can recognize RAN paging in the idle state. Mainly reflected in the terminal needs to distinguish between CN paging and RAN paging in the idle state. Since the CN paging carries the identifier of the terminal in the inactive state, the CN paging carries the identifier of the terminal in the idle state. Therefore, the terminal can distinguish between the RAN paging and the CN paging according to the saved identifier of the terminal in the inactive state. For example, the identifiers of the same terminal are used in the RAN paging and the CN paging. The information used in the present application is not limited to the identifier of the terminal. However, both of the pagings may carry an indication information to distinguish the two. Paging. Of course, this application is not limited to this.
第二，终端在空闲态下，能够获知RAN paging的接收时间。为此，在本申请的一些实施例中，终端从非激活态转换为空闲态后，还可以保存DRX配置信息，这样，终端根据DRX配置信息即可计算得到RAN paging的接收时间。其中，DRX配置信息可以包括但不限于：RAN配置的寻呼DRX周期(RAN configured paging DRX cycle)。终端根据DRX配置信息计算RAN paging的接收时间的实现过程可参考现有技术。Second, the terminal can know the reception time of the RAN paging in the idle state. To this end, in some embodiments of the present application, after the terminal transitions from the inactive state to the idle state, the DRX configuration information may also be saved, so that the terminal can calculate the receiving time of the RAN paging according to the DRX configuration information. The DRX configuration information may include, but is not limited to, a RAN configured paging DRX cycle. The implementation process of the terminal calculating the reception time of the RAN paging according to the DRX configuration information may refer to the prior art.
基于上述描述，可实现终端在RAN paging的接收时间，监听RAN paging，以接收RAN paging。Based on the above description, the receiving time of the terminal at the RAN paging can be implemented, and the RAN paging is monitored to receive the RAN paging.
可选的，在S304之前，该方法还可以包括：S303a～S303b，可参考上述S102～S104，本申请不限于此。另外，关于连接请求的格式可参考下文。Optionally, before S304, the method may further include: S303a-S303b, reference may be made to the foregoing S102-S104, and the application is not limited thereto. In addition, the format of the connection request can be referred to below.
S306：基站向终端发送重配置激活响应，终端接收该重配置激活响应。S306: The base station sends a reconfiguration activation response to the terminal, and the terminal receives the reconfiguration activation response.
S308：终端向基站发送RRC连接重激活完成消息，基站接收该RRC连接重激活完成消息。S308: The terminal sends an RRC connection reactivation complete message to the base station, and the base station receives the RRC connection reactivation complete message.
上述S304～S308可以认为终端与基站配置空口连接，以及基站重用RAN-CN连接的过程。S306～S308的具体实现可参考上文，此处不再赘述。The above S304-S308 can be considered as a process in which the terminal and the base station are configured to be connected to the air interface, and the base station reuses the RAN-CN connection. For specific implementations of S306 to S308, reference may be made to the above, and details are not described herein again.
上述S302～S308中的基站是指服务基站。结合图4以及上文关于图4的相关描述可知，若服务基站与锚点基站相同，则执行S304之后，可执行S306。若服务基站与锚点基站不同，则在S304之后与S306之前，该方法还可以包括305，其中，S305的具体实现可参考S207a～S207f。需要说明的是，终端可以从***消息中获取到服务基站的ID或者从同步消息(如主同步消息或辅同步消息)中获取到服务基站的ID。另外，终端可以从RAN设备分配的终端的ID中提取锚点基站的ID，然后保存锚点基站的ID。这样，终端可以通过比较锚点基站的ID与服务基站的ID是否相同，来确定服务基站与锚点基站是否相同。The base stations in the above S302 to S308 refer to the serving base station. 4, and the related description above with respect to FIG. 4, if the serving base station is the same as the anchor base station, after executing S304, S306 may be performed. If the serving base station is different from the anchor base station, the method may further include 305 after S304 and before S306, wherein the specific implementation of S305 may refer to S207a to S207f. It should be noted that the terminal may obtain the ID of the serving base station from the system message or obtain the ID of the serving base station from the synchronization message (such as the primary synchronization message or the secondary synchronization message). In addition, the terminal may extract the ID of the anchor base station from the ID of the terminal allocated by the RAN device, and then save the ID of the anchor base station. In this way, the terminal can determine whether the serving base station and the anchor base station are the same by comparing whether the ID of the anchor base station is the same as the ID of the serving base station.
本申请提供的技术方案可以理解为：终端在空闲态下，保存非激活态的相关信息，以触发非激活态的resume/reactive流程。The technical solution provided by the present application can be understood as: the terminal saves the information about the inactive state in the idle state to trigger the resume/reactive process in the inactive state.
本申请提供的通信方法，终端在空闲态下，通过该终端在非激活态的标识发起连接流程，从而建立空口连接，并重用已建立的与非激活态的标识相关的RAN-CN连接。该方法可以应用于状态失步场景中，并且在该场景中，相比终端在空闲态下向基站发送从空闲态转换至连接态的连接建立请求，使得基站建立空口连接和RAN-CN连接的方案，本申请提供的方案，有助于实现基站与终端之间尽快通信。In the communication method provided by the application, in the idle state, the terminal initiates a connection process by using the identifier of the terminal in an inactive state, thereby establishing an air interface connection, and reusing the established RAN-CN connection related to the inactive state identifier. The method can be applied to a state out-of-synchronization scenario, and in this scenario, the base station sends a connection establishment request from the idle state to the connected state to the base station in an idle state, so that the base station establishes an air interface connection and a RAN-CN connection. Solution, the solution provided by the application helps to realize communication between the base station and the terminal as soon as possible.
可选的，连接请求的格式可以通过但不限于以下任一方式实现：Optionally, the format of the connection request can be implemented by one of the following methods:
(1)连接请求复用连接建立请求，例如RRC连接建立请求。具体的：(1) A connection request multiplex connection establishment request, such as an RRC connection establishment request. specific:
方式1：RRC连接建立请求包括终端在空闲态的标识和终端在非激活态的标识。并且，终端在空闲态的标识有效，终端在非激活态的标识可能有效也可能无效。Manner 1: The RRC connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state. Moreover, the identifier of the terminal in the idle state is valid, and the identifier of the terminal in the inactive state may be valid or invalid.
可选的，如果RAN没有为终端分配标识，则终端在非激活态的标识无效，此时，终端在非激活态的标识可以设置为预设值或无效值。如果RAN为终端分配了标识，则终端在非激活态的标识有效。当然本申请不限于此。另外，该方式中认为CN为终端分配了标识，即终端在空闲态的标识有效。Optionally, if the RAN does not assign an identifier to the terminal, the identifier of the terminal in the inactive state is invalid. At this time, the identifier of the terminal in the inactive state may be set to a preset value or an invalid value. If the RAN assigns an identity to the terminal, the identity of the terminal in the inactive state is valid. Of course, this application is not limited to this. In addition, in this manner, it is considered that the CN assigns an identifier to the terminal, that is, the identifier of the terminal in the idle state is valid.
若终端在非激活态的标识有效，则RRC连接建立请求消息可以用于触发图5中的S306～S308或S305～S308；或者，在执行S305～S308失败的情况下，如服务基站在S207b失败的情况下，触发类似图2中的S110～S122，如图6所示。If the identifier of the terminal in the inactive state is valid, the RRC connection setup request message may be used to trigger S306-S308 or S305-S308 in FIG. 5; or, if the execution of S305-S308 fails, if the serving base station fails in S207b In the case, the trigger is similar to S110 to S122 in FIG. 2, as shown in FIG. 6.
该实施例可以理解为：当终端从非激活态转换至空闲态时，优先根据终端在非激活态的标识，发起连接流程；并在失败的情况下，根据终端在空闲态的标识，发起连接流程。其中，连接流程中，通过在RRC连接建立请求同时携带终端在空闲态的标识和终端在非激活态的标识，这样，能够保证在根据终端在非激活态的标识发起连接流程失败的情况下，立即根据该RRC连接建立请求中的终端在空闲态的标识，发起连接流程，从而节省信令开销，并有助于实现基站与终端之间尽快通信。This embodiment can be understood as: when the terminal transitions from the inactive state to the idle state, the connection process is initiated according to the identifier of the terminal in the inactive state; and in the case of failure, the connection is initiated according to the identifier of the terminal in the idle state. Process. In the connection process, the RRC connection establishment request carries the identifier of the terminal in the idle state and the identifier of the terminal in the inactive state, so that it can ensure that the connection process fails according to the identifier of the terminal in the inactive state. The connection process is initiated according to the identifier of the terminal in the idle state in the RRC connection establishment request, thereby saving signaling overhead and facilitating communication between the base station and the terminal as soon as possible.
方式2：RRC连接建立请求包括终端在空闲态的标识和终端在非激活态的标识。并且，终端在空闲态的标识有效且终端在非激活态的标识无效；或者，终端在空闲态的标识无效且终端在非激活态的标识有效。Manner 2: The RRC connection setup request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state. Moreover, the identifier of the terminal in the idle state is valid and the identifier of the terminal in the inactive state is invalid; or the identifier of the terminal in the idle state is invalid and the identifier of the terminal in the inactive state is valid.
其中，终端在非激活态的标识无效的一种实现方式为：将RRC连接建立请求中的终端在非激活态的标识设置为预设值或无效值。终端在空闲态的标识无效一种实现方式为：将RRC连接建立请求中的终端在空闲态的标识设置为预设值或无效值。An implementation manner in which the identifier of the terminal in the inactive state is invalid is: setting the identifier of the terminal in the inactive state in the RRC connection establishment request to a preset value or an invalid value. The identifier of the terminal in the idle state is invalid. The implementation manner is: setting the identifier of the terminal in the idle state in the RRC connection establishment request to a preset value or an invalid value.
若终端在空闲态的标识有效且终端在非激活态的标识无效，则RRC连接建立请求消息可以用于触发图3中的S110～S122。若终端在空闲态的标识无效且终端在非激活态的标识有效，则RRC连接建立请求消息可以用于触发图5中的S306～S308或S305～S308；或者，在执行S305～S308失败的情况下，如服务基站在S207b失败的情况下，触发类似图2中的S110～S122，如图6所示。区别于方式1，终端需要在S110中携带终端在空闲态的标识。If the identifier of the terminal in the idle state is valid and the identifier of the terminal in the inactive state is invalid, the RRC connection setup request message may be used to trigger S110-S122 in FIG. If the identifier of the terminal in the idle state is invalid and the identifier of the terminal in the inactive state is valid, the RRC connection setup request message may be used to trigger S306-S308 or S305-S308 in FIG. 5; or, in the case where the execution of S305-S308 fails. If the serving base station fails in S207b, the triggering is similar to S110-S122 in FIG. 2, as shown in FIG. 6. Different from the mode 1, the terminal needs to carry the identifier of the terminal in the idle state in S110.
方式3：RRC连接建立请求包括终端的标识和指示信息，终端的标识例如但不限于：终端在空闲态的标识或终端在非激活态的标识或其他用于标识终端的信息。指示信息用于指示连接建立请求的类型，不同的类型具有不同的功能。例如，假设指示信息占1个比特，那么若指示信息是“1”，则连接建立请求可用于触发图3中的S110～S122；若指示信息是“0”，则连接建立请求可用于触发图5中的S306～S308或S305～S308。该指示信息也可以用于指示消息携带的终端的标识的类型。例如，假设指示信息占1个比特，那么若指示信息是“1”，则表明RRC连接建立请求携带的是终端在空闲态的标识，触发图3中的S110～S122；若指示信息是“0”，则表明RRC连接建立请求携带的是终端在非激活态的标识，触发图5中的S306～S308或S305～S308。Mode 3: The RRC connection establishment request includes the identifier and the indication information of the terminal, and the identifier of the terminal is, for example but not limited to, the identifier of the terminal in an idle state or the identifier of the terminal in an inactive state or other information used to identify the terminal. The indication information is used to indicate the type of connection establishment request, and different types have different functions. For example, if the indication information occupies 1 bit, if the indication information is "1", the connection establishment request can be used to trigger S110-S122 in FIG. 3; if the indication information is "0", the connection establishment request can be used to trigger the diagram. S306 to S308 or S305 to S308 in 5. The indication information may also be used to indicate the type of the identifier of the terminal carried by the message. For example, if the indication information occupies 1 bit, if the indication information is "1", it indicates that the RRC connection establishment request carries the identifier of the terminal in the idle state, triggering S110 to S122 in FIG. 3; if the indication information is "0" The RRC connection setup request carries the identifier of the terminal in the inactive state, and triggers S306-S308 or S305-S308 in FIG.
(2)连接请求是连接恢复请求，例如LTE***和NR***中的RRC连接恢复请求，或LTE***和NR***中的连接重建立请求，或NR***中的RRC连接重激活请求等。本申请中以连接恢复请求是RRC连接重激活请求为例进行说明，关于RRC连接重激活请求的作用可参考上文，此处不再赘述。(2) The connection request is a connection recovery request, such as an RRC connection recovery request in the LTE system and the NR system, or a connection re-establishment request in the LTE system and the NR system, or an RRC connection reactivation request in the NR system or the like. In the present application, the connection recovery request is an RRC connection reactivation request as an example. For the role of the RRC connection reactivation request, reference may be made to the above, and details are not described herein again.
(3)连接请求是一新的RRC消息，即本申请中定义了一新的RRC消息类型。具 体的：该新的RRC消息包括终端在空闲态的标识和终端在非激活态的标识。其相关说明可参考上述(1)中的方式1或方式2。或者，该新的RRC消息包括终端的标识和指示信息字段。其相关说明可参考上述(1)中的方式3。(3) The connection request is a new RRC message, that is, a new RRC message type is defined in the present application. Specifically: the new RRC message includes the identity of the terminal in the idle state and the identity of the terminal in the inactive state. For related description, refer to mode 1 or mode 2 in (1) above. Alternatively, the new RRC message includes an identifier and an indication information field of the terminal. For related description, refer to mode 3 in (1) above.
由于终端具有移动性，并且终端移出一个RNA之后，该RAN中的设备为该终端分配的标识会失效。为了节省终端的存储资源，本申请提供了以下实施例：Since the terminal is mobile and the terminal removes an RNA, the identity assigned by the device in the RAN to the terminal will be invalid. In order to save storage resources of the terminal, the present application provides the following embodiments:
在本申请的一些实施例中，设置了一个有效时间，用于终端在空闲态时维护已保存的“终端在非激活态的标识”的有效性。其中，该有效时间可以是预先设置在终端中的，也可以是基站通过信令方式，例如RRC信令等，通知给终端的。本申请对有效时间的时长的大小及确定方式不进行限定。该实施例中，终端可以在该终端在非激活态的标识的有效时间结束时/后，删除该终端在非激活态的标识。例如，终端中可以设置一个计时器(timer)，该计时器可以从转换至空闲态开始计时，并在有效时间结束时/后丢弃该终端在非激活态的标识，从而节省终端的存储资源。In some embodiments of the present application, an effective time is set for the terminal to maintain the validity of the saved "identity of the terminal in an inactive state" in the idle state. The effective time may be preset in the terminal, or may be notified to the terminal by the base station by using a signaling manner, such as RRC signaling. The present application does not limit the size and determination manner of the duration of the effective time. In this embodiment, the terminal may delete the identifier of the terminal in the inactive state when the terminal ends/after the validity time of the identifier of the inactive state. For example, a timer may be set in the terminal, and the timer may start timing from transitioning to the idle state, and discard the identifier of the terminal in the inactive state when the valid time ends/after, thereby saving the storage resource of the terminal.
可以理解的，在设置有效时间的情况下，S302可以实现为：当终端从非激活态转换为空闲态，且该终端在非激活态的标识在有效时间内，保存终端在非激活态的标识。It can be understood that, in the case that the effective time is set, S302 can be implemented as: when the terminal transitions from the inactive state to the idle state, and the identifier of the terminal in the inactive state is within the valid time, the identifier of the terminal in the inactive state is saved. .
需要说明的是，在有些实施例中，基站可以为非激活态的终端配置周期性的基于RAN的通知区域更新(RAN-based notification area update，RNAU)或周期性的基于RAN的位置区域更新(RAN-based location area update，RLAU)。这样，对于终端来说，可以在成功完成RNAU时/后更新该终端在非激活态的标识的有效性，如果失败，则终端转换至空闲态；当然终端还可以通过上文提供的任一方式转换至空闲态。对于基站来说，可以为非激活态的终端配置周期性的RNAU，然后，在周期性的RNAU超时后可以记录该终端的当前状态是空闲态，从而实现状态同步。基于此，本申请提供了一种设置终端在非激活态的标识的有效时间的方式。具体的：以RNAU的周期是T1，有效时间是T2为例，T2≤T1。这样，能够保证终端可能在计时器超时前转换至空闲态，而基站会在计时器超时后转换至空闲态，从而最终实现状态同步。It should be noted that, in some embodiments, the base station may configure a periodic RAN-based notification area update (RNAU) or a periodic RAN-based location area update for the inactive terminal ( RAN-based location area update, RLAU). In this way, for the terminal, the validity of the identity of the terminal in the inactive state can be updated when the RNAU is successfully completed, and if it fails, the terminal switches to the idle state; of course, the terminal can also adopt any of the methods provided above. Switch to idle state. For the base station, the periodic RNAU can be configured for the inactive terminal, and then the current state of the terminal can be recorded as an idle state after the periodic RNAU timeout, thereby achieving state synchronization. Based on this, the present application provides a way to set the effective time of the identification of the terminal in the inactive state. Specifically: the period of the RNAU is T1, and the effective time is T2 as an example, and T2 ≤ T1. In this way, it can be ensured that the terminal may switch to the idle state before the timer expires, and the base station will switch to the idle state after the timer expires, thereby finally achieving state synchronization.
在本申请的一些实施例中，当终端移出该终端在非激活态的标识相关的RNA，该终端可以删除该终端在非激活态的标识，从而节省终端的存储资源。其中，若终端在非激活态的标识是某一RNA中的设备分配的，则该RNA即为该终端在非激活态的标识相关的RNA。本申请对终端在空闲态下，如何确定是否移出某一RNA的实现方式不进行限定。例如，终端可以在从非激活态转换至空闲态后，保存RNA对应的小区信息。这样，终端可以根据RNA对应的小区信息，确定该终端是否移出了该RNA。其中，RNA对应的小区信息可以包括但不限于RNA对应的小区列表。可以理解的，终端移出该终端在非激活态的标识相关的RNA时/后，该终端还可以删除RNA对应的小区信息，从而进一步节省终端的存储资源。In some embodiments of the present application, when the terminal removes the identifier-related RNA of the terminal in the inactive state, the terminal may delete the identifier of the terminal in the inactive state, thereby saving the storage resource of the terminal. Wherein, if the identifier of the terminal in the inactive state is allocated by the device in the certain RNA, the RNA is the RNA related to the identification of the terminal in the inactive state. The application does not limit how the terminal determines whether to remove a certain RNA in an idle state. For example, the terminal may save the cell information corresponding to the RNA after transitioning from the inactive state to the idle state. In this way, the terminal can determine whether the terminal has removed the RNA according to the cell information corresponding to the RNA. The cell information corresponding to the RNA may include, but is not limited to, a cell list corresponding to the RNA. It can be understood that, after the terminal moves out of the identifier-related RNA of the terminal in the inactive state, the terminal can also delete the cell information corresponding to the RNA, thereby further saving the storage resource of the terminal.
上述主要从各个网元之间交互的角度对本申请实施例提供的方案进行了介绍。可以理解的是，各个网元，例如基站或者终端。为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，本申请能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来 使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。The solution provided by the embodiment of the present application is mainly introduced from the perspective of interaction between the network elements. It can be understood that each network element, such as a base station or a terminal. In order to implement the above functions, it includes hardware structures and/or software modules corresponding to the execution of the respective functions. Those skilled in the art will readily appreciate that the present application can be implemented in a combination of hardware or hardware and computer software in combination with the elements and algorithm steps of the various examples described in the embodiments disclosed herein. Whether a function is implemented in hardware or computer software to drive hardware depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functionality for each particular application, but such implementation should not be considered to be beyond the scope of the present application.
本申请实施例可以根据上述方法示例对基站或者终端进行功能模块的划分，例如，可以对应各个功能划分各个功能模块，也可以将两个或两个以上的功能集成在一个处理模块中。上述集成的模块既可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。需要说明的是，本申请实施例中对模块的划分是示意性的，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。下面以采用对应各个功能划分各个功能模块为例进行说明。The embodiment of the present application may divide a function module into a base station or a terminal according to the foregoing method example. For example, each function module may be divided according to each function, or two or more functions may be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of the module in the embodiment of the present application is schematic, and is only a logical function division, and the actual implementation may have another division manner. The following is an example of dividing each functional module by using corresponding functions.
本申请实施例还提供一种信息传输装置，该信息传输装置可以是终端。该终端可以用于执行图5中终端所执行的步骤。图6示出了一种简化的终端结构示意图。便于理解和图示方便，图6中，终端以手机作为例子。如图6所示，终端包括处理器、存储器、射频电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对终端进行控制，执行软件程序，处理软件程序的数据等。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。需要说明的是，有些种类的终端可以不具有输入输出装置。The embodiment of the present application further provides an information transmission device, which may be a terminal. The terminal can be used to perform the steps performed by the terminal in FIG. Figure 6 shows a simplified schematic diagram of the terminal structure. It is convenient for understanding and illustration. In Figure 6, the terminal uses a mobile phone as an example. As shown in FIG. 6, the terminal includes a processor, a memory, a radio frequency circuit, an antenna, and an input and output device. The processor is mainly used for processing communication protocols and communication data, and controlling terminals, executing software programs, processing data of software programs, and the like. Memory is primarily used to store software programs and data. The RF circuit is mainly used for the conversion of the baseband signal and the RF signal and the processing of the RF signal. The antenna is mainly used to transmit and receive RF signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are primarily used to receive user input data and output data to the user. It should be noted that some types of terminals may not have input and output devices.
当需要发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行射频处理后将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端时，射频电路通过天线接收到射频信号，将射频信号转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。为便于说明，图7中仅示出了一个存储器和处理器。在实际的终端产品中，可以存在一个或多个处理器和一个或多个存储器。存储器也可以称为存储介质或者存储设备等。存储器可以是独立于处理器设置，也可以是与处理器集成在一起，本申请实施例对此不做限制。When the data needs to be sent, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal, and then sends the radio frequency signal to the outside through the antenna in the form of electromagnetic waves. When data is sent to the terminal, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor, which converts the baseband signal into data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. In an actual end product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device or the like. The memory may be independent of the processor, or may be integrated with the processor, which is not limited in this embodiment of the present application.
在本申请实施例中，可以将具有收发功能的天线和射频电路视为终端的收发单元，将具有处理功能的处理器视为终端的处理单元。如图7所示，终端包括收发单元701和处理单元702。收发单元也可以称为收发器、收发机、收发装置等。处理单元也可以称为处理器，处理单板，处理模块、处理装置等。可选的，可以将收发单元701中用于实现接收功能的器件视为接收单元，将收发单元701中用于实现发送功能的器件视为发送单元，即收发单元701包括接收单元和发送单元。收发单元有时也可以称为收发机、收发器、或收发电路等。接收单元有时也可以称为接收机、接收器、或接收电路等。发送单元有时也可以称为发射机、发射器或者发射电路等。In the embodiment of the present application, the antenna and the radio frequency circuit having the transceiving function can be regarded as the transceiving unit of the terminal, and the processor having the processing function can be regarded as the processing unit of the terminal. As shown in FIG. 7, the terminal includes a transceiver unit 701 and a processing unit 702. The transceiver unit can also be referred to as a transceiver, a transceiver, a transceiver, and the like. The processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, and the like. Optionally, the device for implementing the receiving function in the transceiver unit 701 can be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 701 is regarded as a sending unit, that is, the transceiver unit 701 includes a receiving unit and a sending unit. The transceiver unit may also be referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit or the like. The transmitting unit may also be referred to as a transmitter, a transmitter, or a transmitting circuit, and the like.
例如，在一种实现方式中，处理单元702，用于在该终端处于空闲态时，确定终端在非激活态的标识，和/或本申请中的其他步骤。收发单元701用于执行图5中的S304中终端所执行的步骤，和/或本申请中的其他步骤。在另一种实现方式中，该装置还可以包括：存储单元703用于执行图5中的S302，和/或本申请中的其他步骤。For example, in one implementation, the processing unit 702 is configured to determine an identity of the terminal in an inactive state when the terminal is in an idle state, and/or other steps in the application. The transceiver unit 701 is configured to perform the steps performed by the terminal in S304 in FIG. 5, and/or other steps in the present application. In another implementation, the apparatus may further include: the storage unit 703 for performing S302 in FIG. 5, and/or other steps in the application.
本申请实施例还提供一种信息传输装置。该信息传输装置可以是基站。图8示出了一种简化基站结构示意图。基站包括801部分以及802部分。801部分主要用于射频信号的收发以及射频信号与基带信号的转换；802部分主要用于基带处理，对基站 进行控制等。801部分通常可以称为收发单元、收发机、收发电路、或者收发器等。802部分通常是基站的控制中心，通常可以称为处理单元，用于控制基站执行上述图5中关于基站(即服务基站)所执行的步骤。具体可参见上述相关部分的描述。The embodiment of the present application further provides an information transmission device. The information transmission device can be a base station. Figure 8 shows a schematic diagram of a simplified base station structure. The base station includes a 801 part and an 802 part. The 801 part is mainly used for the transmission and reception of radio frequency signals and the conversion of radio frequency signals and baseband signals; the 802 part is mainly used for baseband processing and control of base stations. Section 801 can be generally referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver. The 802 portion is typically the control center of the base station and may be referred to as a processing unit for controlling the base station to perform the steps performed by the base station (i.e., the serving base station) of FIG. 5 above. For details, please refer to the description of the relevant part above.
801部分的收发单元，也可以称为收发机，或收发器等，其包括天线和射频单元，其中射频单元主要用于进行射频处理。可选的，可以将801部分中用于实现接收功能的器件视为接收单元，将用于实现发送功能的器件视为发送单元，即801部分包括接收单元和发送单元。接收单元也可以称为接收机、接收器、或接收电路等，发送单元可以称为发射机、发射器或者发射电路等。The transceiver unit of the 801 part, which may also be called a transceiver, or a transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is mainly used for radio frequency processing. Alternatively, the device for implementing the receiving function in the 801 part may be regarded as a receiving unit, and the device for implementing the transmitting function may be regarded as a transmitting unit, that is, the 801 portion includes a receiving unit and a transmitting unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, a transmitter, or a transmitting circuit or the like.
802部分可以包括一个或多个单板，每个单板可以包括一个或多个处理器和一个或多个存储器，处理器用于读取和执行存储器中的程序以实现基带处理功能以及对基站的控制。若存在多个单板，各个单板之间可以互联以增加处理能力。作为一中可选的实施方式，也可以是多个单板共用一个或多个处理器，或者是多个单板共用一个或多个存储器，或者是多个单板同时共用一个或多个处理器。The 802 portion may include one or more boards, each of which may include one or more processors and one or more memories for reading and executing programs in the memory to implement baseband processing functions and for base stations control. If multiple boards exist, the boards can be interconnected to increase processing power. As an optional implementation manner, multiple boards share one or more processors, or multiple boards share one or more memories, or multiple boards share one or more processes at the same time. Device.
例如，在一种实现方式中，收发单元用于执行图3中的S304中服务基站所执行的步骤，和/或本申请中的其他步骤。处理单元用于执行S305中服务基站所执行的处理的步骤，和/或本申请中的其他步骤。For example, in one implementation, the transceiver unit is operative to perform the steps performed by the serving base station in S304 of FIG. 3, and/or other steps in the application. The processing unit is operative to perform the steps of the processing performed by the serving base station in S305, and/or other steps in the application.
上述提供的任一种通信装置中相关内容的解释及有益效果均可参考上文提供的对应的方法实施例，此处不再赘述。For the explanation and beneficial effects of the related content in any of the above-mentioned communication devices, reference may be made to the corresponding method embodiments provided above, and details are not described herein again.
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件程序实现时，可以全部或部分地以计算机程序产品的形式来实现。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行计算机程序指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或者数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可以用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)，光介质(例如，DVD)、或者半导体介质(例如固态硬盘(solid state disk，SSD))等。In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it 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 instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are generated in whole or in part. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be from a website site, computer, server or data center Transmission to another website site, computer, server or data center via wired (eg coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (eg infrared, wireless, microwave, etc.). The computer readable storage medium can be any available media that can be accessed by a computer or a data storage device that includes one or more servers, data centers, etc. that can be integrated with the media. The usable medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (such as a solid state disk (SSD)) or the like.
尽管在此结合各实施例对本申请进行了描述，然而，在实施所要求保护的本申请过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。Although the present application has been described herein in connection with the various embodiments, those skilled in the art can Other variations of the disclosed embodiments are achieved. In the claims, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill several of the functions recited in the claims. Certain measures are recited in mutually different dependent claims, but this does not mean that the measures are not combined to produce a good effect.
尽管结合具体特征及其实施例对本申请进行了描述，显而易见的，在不脱离本申请的精神和范围的情况下，可对其进行各种修改和组合。相应地，本说明书和附图仅 仅是所附权利要求所界定的本申请的示例性说明，且视为已覆盖本申请范围内的任意和所有修改、变化、组合或等同物。显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。While the present invention has been described in connection with the specific embodiments and embodiments thereof, various modifications and combinations can be made without departing from the spirit and scope of the application. Accordingly, the specification and drawings are to be construed as illustrative only It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims (26)

  1. 一种通信方法，其特征在于，包括：A communication method, comprising:
    处于空闲态的终端确定所述终端在非激活态的标识；The terminal in the idle state determines the identifier of the terminal in an inactive state;
    所述终端根据所述终端在非激活态的标识，发起连接流程。The terminal initiates a connection process according to the identifier of the terminal in an inactive state.
  2. 根据权利要求1所述的方法，其特征在于，所述终端根据所述终端在非激活态的标识，发起连接流程，包括：The method according to claim 1, wherein the terminal initiates a connection process according to the identifier of the terminal in an inactive state, including:
    所述终端发送连接建立请求，所述连接建立请求包括指示所述终端在非激活态的标识的信息；Sending, by the terminal, a connection establishment request, where the connection establishment request includes information indicating an identifier of the terminal in an inactive state;
    或者，所述终端发送连接恢复请求，所述连接恢复请求包括指示所述终端在非激活态的标识的信息。Or the terminal sends a connection recovery request, where the connection recovery request includes information indicating an identifier of the terminal in an inactive state.
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：The method according to claim 1 or 2, wherein the method further comprises:
    当所述终端从非激活态转换为空闲态，保存所述终端在非激活态的标识。When the terminal transitions from an inactive state to an idle state, the identifier of the terminal in an inactive state is saved.
  4. 根据权利要求3所述的方法，其特征在于，保存所述终端在非激活态的标识，包括：The method according to claim 3, wherein the saving of the identifier of the terminal in an inactive state comprises:
    当所述终端没有向基站发送状态转换通知，保存所述终端在非激活态的标识；When the terminal does not send a state transition notification to the base station, saving the identifier of the terminal in an inactive state;
    或者，当所述终端从非激活态转换为空闲态，且所述终端没能成功向基站发送状态转换通知，保存所述终端在非激活态的标识。Alternatively, when the terminal transitions from an inactive state to an idle state, and the terminal fails to successfully send a state transition notification to the base station, the identifier of the terminal in an inactive state is saved.
  5. 根据权利要求1至4任一项所述的方法，其特征在于，在所述终端根据所述终端在非激活态的标识，发起连接流程之前，所述方法还包括：The method according to any one of claims 1 to 4, wherein before the terminal initiates a connection process according to the identifier of the terminal in an inactive state, the method further includes:
    所述终端接收基站发送的无线接入网RAN寻呼消息。The terminal receives a radio access network RAN paging message sent by the base station.
  6. 根据权利要求5所述的方法，其特征在于，在所述终端接收基站发送的RAN寻呼消息之前，所述方法还包括：The method according to claim 5, wherein before the terminal receives the RAN paging message sent by the base station, the method further includes:
    所述终端保存所述终端在非激活态的非连续接收DRX配置信息；The terminal saves discontinuous reception DRX configuration information of the terminal in an inactive state;
    所述终端根据所述DRX配置信息确定所述RAN寻呼消息的接收时间。The terminal determines a receiving time of the RAN paging message according to the DRX configuration information.
  7. 根据权利要求3至6任一项所述的方法，其特征在于，保存所述终端在非激活态的标识，包括：The method according to any one of claims 3 to 6, wherein the saving of the identifier of the terminal in an inactive state comprises:
    当所述终端在非激活态的标识在有效时间内，保存所述终端在非激活态的标识。When the identifier of the terminal in the inactive state is within the valid time, the identifier of the terminal in the inactive state is saved.
  8. 根据权利要求3至6任一项所述的方法，其特征在于，所述方法还包括：The method according to any one of claims 3 to 6, wherein the method further comprises:
    当所述终端在非激活态的标识的有效时间结束，删除所述终端在非激活态的标识；When the validity time of the identifier of the inactive state is ended, the identifier of the terminal in the inactive state is deleted;
    或者，当所述终端移出所述终端在非激活态的标识相关的基于无线接入网的通知区域RNA，删除所述终端在非激活态的标识。Alternatively, when the terminal moves out of the radio access network-based notification area RNA related to the identifier of the terminal in the inactive state, the identifier of the terminal in the inactive state is deleted.
  9. 根据权利要求8所述的方法，其特征在于，所述方法还包括：The method of claim 8 further comprising:
    所述终端保存所述终端在非激活态的标识关联的RNA对应的小区信息；其中，所述RNA对应的小区信息用于确定所述终端是否移出所述RNA。The terminal saves cell information corresponding to the RNA associated with the identifier of the terminal in an inactive state; wherein the cell information corresponding to the RNA is used to determine whether the terminal removes the RNA.
  10. 根据权利要求2所述的方法，其特征在于，The method of claim 2 wherein:
    所述连接建立请求包括所述终端在空闲态的标识和所述终端在非激活态的标识；The connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state;
    或者，所述连接建立请求包括所述终端的标识和指示信息，其中，所述终端的标识包括所述终端在空闲态的标识或所述终端在非激活态的标识，所述指示信息用于指示所述连接建立请求的类型或者指示所述终端的标识的类型。Or the connection establishment request includes the identifier and the indication information of the terminal, where the identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state, where the indication information is used. Indicates the type of the connection establishment request or the type of the identity of the terminal.
  11. 一种通信方法，其特征在于，包括：A communication method, comprising:
    基站接收连接建立请求，所述连接建立请求包括终端在非激活态的标识；Receiving, by the base station, a connection establishment request, where the connection establishment request includes an identifier of the terminal in an inactive state;
    所述基站根据所述终端在非激活态的标识，建立所述基站与所述终端之间的空口连接，并重用所述基站与和核心网设备之间的连接。The base station establishes an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and reuses the connection between the base station and the core network device.
  12. 根据权利要求11所述的方法，其特征在于，所述方法还包括：The method of claim 11 wherein the method further comprises:
    所述基站向所述终端发送无线接入网RAN寻呼消息，所述RAN寻呼消息用于指示所述终端发送所述连接建立请求。The base station sends a radio access network RAN paging message to the terminal, where the RAN paging message is used to instruct the terminal to send the connection establishment request.
  13. 根据权利要求11或12所述的方法，其特征在于，Method according to claim 11 or 12, characterized in that
    所述连接建立请求包括所述终端在空闲态的标识和所述终端在非激活态的标识；The connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state;
    或者，所述连接建立请求包括所述终端的标识和指示信息，其中，所述终端的标识包括所述终端在空闲态的标识或所述终端在非激活态的标识，所述指示信息用于指示所述连接建立请求的类型或者指示所述终端的标识的类型。Or the connection establishment request includes the identifier and the indication information of the terminal, where the identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state, where the indication information is used. Indicates the type of the connection establishment request or the type of the identity of the terminal.
  14. 一种终端，其特征在于，所述终端处于空闲态；所述终端包括：A terminal, wherein the terminal is in an idle state; the terminal includes:
    处理单元，用于确定所述终端在非激活态的标识；a processing unit, configured to determine an identifier of the terminal in an inactive state;
    收发单元，用于根据所述终端在非激活态的标识，发起连接流程。And a transceiver unit, configured to initiate a connection process according to the identifier of the terminal in an inactive state.
  15. 根据权利要求14所述的终端，其特征在于，所述收发单元具体用于：The terminal according to claim 14, wherein the transceiver unit is specifically configured to:
    发送连接建立请求，所述连接建立请求包括指示所述终端在非激活态的标识的信息；Sending a connection establishment request, the connection establishment request including information indicating an identifier of the terminal in an inactive state;
    或者，发送连接恢复请求，所述连接恢复请求包括指示所述终端在非激活态的标识的信息。Alternatively, a connection recovery request is sent, the connection recovery request including information indicating an identity of the terminal in an inactive state.
  16. 根据权利要求14或15所述的终端，其特征在于，所述终端还包括：The terminal according to claim 14 or 15, wherein the terminal further comprises:
    存储单元，用于当所述终端从非激活态转换为空闲态，保存所述终端在非激活态的标识。And a storage unit, configured to save the identifier of the terminal in an inactive state when the terminal transitions from an inactive state to an idle state.
  17. 根据权利要求16所述的终端，其特征在于，所述存储单元具体用于：The terminal according to claim 16, wherein the storage unit is specifically configured to:
    当所述终端没有向基站发送状态转换通知，保存所述终端在非激活态的标识；When the terminal does not send a state transition notification to the base station, saving the identifier of the terminal in an inactive state;
    或者，当所述终端从非激活态转换为空闲态，且所述终端没能成功向基站发送状态转换通知，保存所述终端在非激活态的标识。Alternatively, when the terminal transitions from an inactive state to an idle state, and the terminal fails to successfully send a state transition notification to the base station, the identifier of the terminal in an inactive state is saved.
  18. 根据权利要求14至17任一项所述的终端，其特征在于，A terminal according to any one of claims 14 to 17, wherein
    所述收发单元还用于：接收基站发送的无线接入网RAN寻呼消息。The transceiver unit is further configured to: receive a radio access network RAN paging message sent by the base station.
  19. 根据权利要求18所述的终端，其特征在于，所述终端还包括：The terminal according to claim 18, wherein the terminal further comprises:
    存储单元，用于保存所述终端在非激活态的非连续接收DRX配置信息；a storage unit, configured to save discontinuous reception DRX configuration information of the terminal in an inactive state;
    所述处理单元还用于，根据所述DRX配置信息确定所述RAN寻呼消息的接收时间。The processing unit is further configured to determine, according to the DRX configuration information, a receiving time of the RAN paging message.
  20. 根据权利要求16至19任一项所述的终端，其特征在于，A terminal according to any one of claims 16 to 19, characterized in that
    所述存储单元具体用于：当所述终端在非激活态的标识在有效时间内，保存所述终端在非激活态的标识。The storage unit is specifically configured to: when the identifier of the terminal in the inactive state is within a valid time, save the identifier of the terminal in an inactive state.
  21. 根据权利要求16至19任一项所述的终端，其特征在于，所述处理单元还用于：The terminal according to any one of claims 16 to 19, wherein the processing unit is further configured to:
    当所述终端在非激活态的标识的有效时间结束，删除所述终端在非激活态的标识；When the validity time of the identifier of the inactive state is ended, the identifier of the terminal in the inactive state is deleted;
    或者，当所述终端移出所述终端在非激活态的标识相关的基于无线接入网的通知区域RNA，删除所述终端在非激活态的标识。Alternatively, when the terminal moves out of the radio access network-based notification area RNA related to the identifier of the terminal in the inactive state, the identifier of the terminal in the inactive state is deleted.
  22. 根据权利要求21所述的终端，其特征在于，The terminal according to claim 21, characterized in that
    所述存储单元还用于：保存所述终端在非激活态的标识关联的RNA对应的小区信息；其中，所述RNA对应的小区信息用于确定所述终端是否移出所述RNA。The storage unit is further configured to: save cell information corresponding to the RNA associated with the identifier of the terminal in an inactive state; wherein the cell information corresponding to the RNA is used to determine whether the terminal removes the RNA.
  23. 根据权利要求15所述的终端，其特征在于，The terminal of claim 15 wherein:
    所述连接建立请求包括所述终端在空闲态的标识和所述终端在非激活态的标识；The connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state;
    或者，所述连接建立请求包括所述终端的标识和指示信息，其中，所述终端的标识包括所述终端在空闲态的标识或所述终端在非激活态的标识，所述指示信息用于指示所述连接建立请求的类型或者指示所述终端的标识的类型。Or the connection establishment request includes the identifier and the indication information of the terminal, where the identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state, where the indication information is used. Indicates the type of the connection establishment request or the type of the identity of the terminal.
  24. 一种基站，其特征在于，包括：A base station, comprising:
    收发单元，用于接收连接建立请求，所述连接建立请求包括终端在非激活态的标识；a transceiver unit, configured to receive a connection establishment request, where the connection establishment request includes an identifier of the terminal in an inactive state;
    处理单元，用于根据所述终端在非激活态的标识，建立所述基站与所述终端之间的空口连接，并重用所述基站与和核心网设备之间的连接。And a processing unit, configured to establish an air interface connection between the base station and the terminal according to the identifier of the terminal in an inactive state, and reuse a connection between the base station and a core network device.
  25. 根据权利要求24所述的基站，其特征在于，The base station according to claim 24, characterized in that
    所述收发单元还用于：向所述终端发送无线接入网RAN寻呼消息，所述RAN寻呼消息用于指示所述终端发送所述连接建立请求。The transceiver unit is further configured to: send a radio access network RAN paging message to the terminal, where the RAN paging message is used to instruct the terminal to send the connection establishment request.
  26. 根据权利要求24或25所述的基站，其特征在于，A base station according to claim 24 or 25, characterized in that
    所述连接建立请求包括所述终端在空闲态的标识和所述终端在非激活态的标识；The connection establishment request includes an identifier of the terminal in an idle state and an identifier of the terminal in an inactive state;
    或者，所述连接建立请求包括所述终端的标识和指示信息，其中，所述终端的标识包括所述终端在空闲态的标识或所述终端在非激活态的标识，所述指示信息用于指示所述连接建立请求的类型或者指示所述终端的标识的类型。Or the connection establishment request includes the identifier and the indication information of the terminal, where the identifier of the terminal includes an identifier of the terminal in an idle state or an identifier of the terminal in an inactive state, where the indication information is used. Indicates the type of the connection establishment request or the type of the identity of the terminal.
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