WO2023066223A1 - 通信方法、通信装置、以及机算机存储介质 - Google Patents

通信方法、通信装置、以及机算机存储介质 Download PDF

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Publication number
WO2023066223A1
WO2023066223A1 PCT/CN2022/125828 CN2022125828W WO2023066223A1 WO 2023066223 A1 WO2023066223 A1 WO 2023066223A1 CN 2022125828 W CN2022125828 W CN 2022125828W WO 2023066223 A1 WO2023066223 A1 WO 2023066223A1
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Prior art keywords
access network
terminal
indication information
network device
voice service
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PCT/CN2022/125828
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English (en)
French (fr)
Inventor
王瑞
孙林
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华为技术有限公司
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Publication of WO2023066223A1 publication Critical patent/WO2023066223A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method, a communication device, and a computer storage medium.
  • the NR base station when the terminal enters the connected state, if the terminal needs to perform voice services, the NR base station can trigger the terminal to switch or redirect to the long term evolution (long term evolution, LTE) cell, thus, The terminal can perform voice services through the LTE cell.
  • This process may be called evolved packet system fallback (EPS fallback).
  • EPS fallback evolved packet system fallback
  • the above EPS fallback process is only applicable to connected terminals. If the terminal is in the idle state or the inactive state, the terminal needs to enter the connected state before the EPS fallback process can be performed, which prolongs the overall time and affects the communication quality of the terminal.
  • the embodiment of the present application provides a communication method, a communication device, and a computer storage medium, which are used to improve the communication quality of voice services.
  • the present application provides a communication method, including: a first access network device acquires voice service indication information; the first access network device sends a first paging message to a first terminal, and the first paging The message includes the voice service indication information, wherein the first access network device is located in the first access network using the first wireless access technology; the first access network device receives the voice service from the first terminal A request message, the request message is used to request establishment or recovery of a radio resource control (radio resource control, RRC) connection, the request message includes indication information, and the indication information is used to indicate that the RRC connection is established based on a voice service or resumed; the first access network device determines to access the first terminal to a second access network using a second radio access technology according to the indication information, and the second access network supports the The first terminal performs the voice service.
  • RRC radio resource control
  • the first terminal is in a non-connected state, including a third state or an idle state.
  • the determining, by the first access network device, according to the indication information that the first terminal is accessed to the second access network using the second radio access technology includes: The first access network device determines to switch or redirect the first terminal to a second access network device according to the indication information, where the second access network device is located on the second access network.
  • the determining, by the first access network device, according to the indication information that the first terminal is accessed to the second access network using the second radio access technology includes: The first access network device configures measurement parameters for the first terminal according to the indication information, and the measurement parameters are used to measure the information managed by one or more access network devices in the second access network. district.
  • the determining, by the first access network device, according to the indication information that the first terminal is accessed to the second access network using the second radio access technology includes: The first access network device determines a target base station or a target cell in the second access network for the first terminal according to the indication information. The method further includes: the first access network device sending indication information indicating the target base station or target cell to the first terminal.
  • the acquiring the voice service indication information by the first access network device includes: receiving, by the first access network device, a second paging message from a core network, and the first access network device receives a second paging message from a core network, and the first access network device The second paging message includes the voice service indication information, wherein the radio access technology used by the core network and the first access network device is the same.
  • the acquiring the voice service indication information by the first access network device includes: receiving, by the first access network device, downlink data transmitted to the first terminal from a core network or signaling related to the first terminal, where the downlink data or the signaling is related to the voice service; the first access network device determines the voice service according to the downlink data or the signaling Service indication information, wherein the wireless access technology used by the core network and the first access network device is the same.
  • the first terminal is in a third state.
  • the method further includes: the first access network device sending a second paging message to a neighboring access network device, where the second paging message includes the voice service indication information.
  • the present application provides a communication method, including: a first terminal receiving a first paging message from a first access network device, where the first paging message includes voice service indication information, wherein the The first access network device is located in the first access network using the first radio access technology; the first terminal sends a request message to the first access network device, and the request message is used to request establishment or restoration of the RRC connection , the request message includes indication information, where the indication information is used to indicate that the RRC connection is established or restored based on the voice service.
  • the voice service indication information is determined based on a second paging message received by the first access network device from the core network, and the second paging message Including the voice service indication information, wherein the wireless access technology used by the core network and the first access network device is the same.
  • the voice service indication information is determined based on downlink data received by the first access network device from the core network or signaling related to the first terminal , the downlink data is transmitted to the terminal, and the downlink data or the signaling is related to the voice service, wherein the wireless access technology used by the core network and the first access network device is the same .
  • the method further includes: the access layer of the first terminal ignores the RRC connection establishment cause value or the RRC connection recovery cause value provided by the non-access layer of the terminal , using the indication information as an RRC connection establishment cause value or an RRC connection recovery cause value.
  • the method further includes: the first terminal receives a measurement parameter from the first access network device, and the measurement parameter is used to measure A cell managed by one or more access network devices.
  • the method further includes: the first terminal receiving, from the first access network device, a message indicating a target base station or a target cell located on the second access network. Instructions.
  • the second access network adopts the second wireless access technology, and supports the first terminal to perform the voice service.
  • the terminal can access the second access network to perform voice services.
  • the first paging message further includes identifiers of one or more terminals, where the identifiers of the first terminals are related to the voice service indication The information corresponds to that the first terminal belongs to the one or more terminals.
  • the first access network is a new air interface network
  • the second access network is a long term evolution network
  • the core network is a 5G core network.
  • the terminal sends an RRC connection establishment/restoration message including a voice service cause value to the access network device, so that the access network device can know that the terminal needs to perform voice services , if the access network device does not support voice services, it can be determined to connect the terminal to other target access networks that support voice services, and perform measurement configuration for the terminal or determine candidate access network devices/devices in the target access network for the terminal cell/frequency point, the access network device can send the measurement configuration to the terminal or instruct the terminal to access the target access network without waiting for the quality of service flow (QoS flow) establishment request sent by the core network, Therefore, the terminal can perform the voice service on the target access network in time, which reduces the time delay for the terminal to perform the voice service, and improves the communication quality.
  • QoS flow quality of service flow
  • the present application provides a communication method, including: a first terminal receives a first paging message from a first access network device, the first paging message includes first indication information, and the first indication The information is used to instruct the first terminal to access the second access network; the first terminal determines a target cell in the second access network according to the first indication information; the first terminal accesses the A second access network device; wherein, the first access network device is located in a first access network using a first wireless access technology, and the second access network uses a second wireless access technology.
  • the access network supports the first terminal to perform the voice service.
  • the first indication information is determined based on a second paging message received by the first access network device from the core network, and the second paging message Contains voice service indication information, wherein the wireless access technology used by the core network and the first access network device is the same.
  • the first indication information is determined based on downlink data received by the first access network device from the core network or signaling related to the first terminal , the downlink data is transmitted to the first terminal, and the downlink data or the signaling is related to the voice service, wherein the wireless access network used by the core network and the first access network equipment The technique is the same.
  • the accessing the second access network device by the first terminal includes: the first terminal sending an RRC to the second access network device to which the target cell belongs Connection establishment request message.
  • the RRC connection establishment request message includes second indication information, where the second indication information is used to indicate that the RRC connection is established based on the voice service.
  • the access layer of the first terminal ignores the RRC connection establishment cause value provided by the non-access layer of the first terminal, and uses the second indication information as the RRC connection establishment cause value.
  • the method further includes: receiving candidate frequency point or candidate cell information from the first access network device. Therefore, the first terminal may select a target cell from the candidate cells or the cells corresponding to the candidate frequency points to access.
  • the method further includes: receiving third indication information from the first access network device, where the third indication information is used to indicate that the first access network device The network device does not support voice services; the first terminal determines to access the second access network device according to the first indication information and third indication information, wherein the first indication information is voice service indication information.
  • the third indication information is included in system information broadcast by the first access network device.
  • the present application provides a communication method, including: a first access network device determining a first paging message, where the first paging message includes first indication information, and the first indication information is used to indicate The first terminal accesses a second access network; the first access network device sends the first paging message to the first terminal, and the first paging message is used for the first terminal Determining access to a target cell in the second access network; wherein, the first access network device is located in the first access network using the first wireless access technology, and the second access network uses the second wireless access technology Incoming technology, the second access network supports the first terminal to perform the voice service.
  • the first access network device determining the first paging message includes: the first access network device receiving a second paging message from the core network, and the second paging message The paging message includes voice service indication information; the first access network device determines the first paging message according to the second paging message, wherein the core network and the first access network device use The wireless access technology is the same.
  • the determining the first paging message by the first access network device includes: the first access network device receives downlink data from the core network or a message related to the first terminal Signaling determines that the downlink data is transmitted to the first terminal, and the downlink data or the signaling is related to the voice service; the first access network device order to determine the first paging message.
  • the radio access technology used by the core network and the first access network device is the same.
  • the method further includes: the first access network device sending candidate frequency point or candidate cell information to the first terminal.
  • the candidate frequency point or candidate cell information may be sent through system information or an RRC connection release message.
  • the method further includes: the first access network device sending third indication information to the first terminal, where the third indication information is used to indicate the The first access network device does not support voice services.
  • the third indication information is included in system information broadcast by the first access network device.
  • the first indication information is voice service indication information
  • the first paging message further includes voice service indication information
  • the first paging message further includes identifiers of one or more terminals, where the identifiers of the first terminals are related to the voice service indication The information corresponds to that the first terminal belongs to the one or more terminals.
  • the first access network is a new air interface network
  • the second access network is a long term evolution network
  • the core network is a 5G core network.
  • the access network device instructs the terminal to access the target access network that supports the terminal to perform voice services, so that the terminal does not need to access the resident access network device, and does not need to register with the resident access network device to connect to
  • the core network can directly initiate the access process to the base station in the target access network, so that the terminal can perform voice services on the target access network in a timely manner, reducing the delay of UE voice services and improving communication quality.
  • the present application further provides a communication device, including a unit or module or means for performing the steps of the above first aspect to the fourth aspect.
  • the communication device may be a network device or a device for a network device.
  • the network device may be a base station or a device with some functions of the base station.
  • the present application further provides a communication device, including a processor and an interface circuit, the processor is used to communicate with other devices through the interface circuit, and execute the methods provided in the first aspect to the fourth aspect above.
  • the processor includes one or more.
  • the present application further provides a communication device, including a processor, configured to invoke a program stored in a memory to execute the methods provided in the first aspect to the fourth aspect above.
  • the memory may be located within the device or external to the device.
  • the processor may be one or more processors.
  • the present application further provides a computer program product, when the program is invoked by a processor, the method provided in any one of the above aspects is executed.
  • the present application provides a communication system, including a first access network device and a second access network device, wherein the first access network device is used to execute the method provided in the first aspect; or, the first access network device The network access device is configured to execute the method provided in the fourth aspect.
  • FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application
  • Fig. 2 is a schematic flow chart of an EPS fallback provided by the present application
  • FIG. 3 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 4 is a schematic diagram of a signaling flow of a communication method provided by the present application.
  • FIG. 5 is a schematic flowchart of a communication method provided by the present application.
  • FIG. 6 is a schematic diagram of a signaling flow of a communication method provided by the present application.
  • FIG. 7 is a schematic diagram of a communication device 700 provided in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a network device 800 provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a terminal 900 provided by an embodiment of the present application.
  • the technology described in the embodiment of the present application can be used in various communication systems, for example, long term evolution (long term evolution, LTE) wireless communication system, new air interface (new radio, NR) system and other fifth generation (5th generation, 5G) mobile
  • LTE long term evolution
  • NR new air interface
  • 5th generation, 5G fifth generation
  • the communication system may also be other next generation (next generation, NG) communication systems or new communication systems, etc., which are not limited in this application.
  • a terminal may be various types of equipment that provide voice and/or data connectivity to users, and may also be referred to as terminal equipment, user equipment (user equipment, UE), mobile station, mobile terminal, etc.
  • Terminals can be widely used in various scenarios, such as device-to-device (D2D), vehicle-to-everything (V2X) communication, machine-type communication (MTC), Internet of Things ( internet of things, IOT), virtual reality, augmented reality, industrial control, autonomous driving, telemedicine, smart grid, smart furniture, smart office, smart wearables, smart transportation, smart city, etc.
  • Terminals can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, aerospace equipment, etc.
  • the chip used in the above-mentioned device may also be called a terminal.
  • the UE is used as a terminal for description below.
  • the network equipment may be access network equipment such as a base station.
  • the network equipment may be an evolved base station (evolved NodeB, eNodeB), a transmission reception point (transmission reception point, TRP), a next generation base station (next generation NodeB, gNB) in a fifth generation (5th generation, 5G) mobile communication system ), the next-generation base station in the sixth generation (6th generation, 6G) mobile communication system, the base station in the future mobile communication system, etc.; it can also be a module or unit that completes some functions of the base station, for example, it can be a centralized unit (central unit, CU), or a distributed unit (DU).
  • the CU here completes the functions of the radio resource control protocol and the packet data convergence protocol (PDCP) of the base station, and also completes the function of the service data adaptation protocol (SDAP); the DU completes the functions of the base station
  • the functions of the radio link control layer and the medium access control (medium access control, MAC) layer can also complete the functions of part of the physical layer or all of the physical layer.
  • 3GPP third generation partnership project
  • the network equipment may be a macro base station, a micro base station or an indoor station, or a relay node or a master node.
  • the embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
  • a base station is used as a network device for description.
  • FIG. 1 is a schematic diagram of an application scenario provided by an embodiment of the present application.
  • the base station 1 and the base station 2 shown in FIG. 1 are base stations using different radio access technologies (radio access technology, RAT) respectively, or in other words, the standards of the base station 1 and the base station 2 are different.
  • the base station 1 is connected to the core network 1
  • the base station 2 is connected to the core network 2, and the base station 1 and the base station 2 can communicate directly; or can communicate indirectly through other network devices.
  • Each base station manages one or more cells, and the coverage of each cell can cover one or more terminals, and the terminals access network equipment and obtain communication services through the cells.
  • base station 1 manages cell 1
  • base station 2 manages cell 2
  • UE accesses cell 1 for illustration.
  • base station 1 uses NR wireless access technology, that is, base station 1 is an NR base station, and core network 1 is a 5G core network (5G Core, 5GC);
  • base station 2 uses LTE wireless access technology, that is, base station 2 is an LTE base station, and core network 2 It is an evolved packet core network (Evolved Packet Core, EPC).
  • EPC evolved Packet Core
  • the UE establishes a connection with the 5GC by accessing cell 1.
  • the 5GC can provide voice services for UEs entering the connected state through an evolved packet system (evolved packet system, EPS) fallback method.
  • EPS evolved packet system
  • the core network 1 sends a QoS flow establishment request to the base station 1, and the QoS flow establishment request is used to request establishment of a QoS flow for transmitting voice service data.
  • the core network 1 recognizes that the UE needs to transmit voice service data, and can initiate a session update request (protocol data unit session modification, PDU session modification) process, in which the Base station 1 sends the QoS flow establishment request.
  • a session update request protocol data unit session modification, PDU session modification
  • Base station 1 determines to receive or reject the QoS flow establishment request.
  • base station 1 can determine whether to accept or reject the request based on whether it supports voice services and other known network factors, such as network deployment, core network capabilities, and operator policies. QoS flow establishment request.
  • the base station 1 determines to reject the QoS establishment request, the base station 1 performs the following S203-S204 to complete the EPS fallback.
  • Base station 1 sends to core network 1 an indication of rejecting the QoS flow establishment request.
  • the base station 1 initiates a handover or redirection process to the UE, so that the UE accesses the LTE cell to perform voice services.
  • base station 1 determines that the UE can be handed over or redirected to the cell managed by base station 2, that is, base station 2 is the target base station for handover or redirection, and the cell managed by base station 2 is the target cell for handover or redirection.
  • base station 1 may carry EPS fallback indication information in the handover command sent to UE and in the handover preparation request sent to base station 2, which is used to instruct handover of UE to the cell of base station 2. If the handover fails in the UE, the UE tries to select an LTE cell for access, and then performs RRC re-establishment if it cannot find a suitable LTE cell. When the UE accesses the LTE cell, the RRC connection establishment request message may carry a cause value indicating that the RRC connection is based on the establishment of the voice service by the UE.
  • base station 1 may carry EPS fallback indication information in the RRC release message sent to the UE, which is used to indicate that the UE is redirected to the cell of base station 2. Furthermore, the UE may send an RRC connection establishment request to the cell of the base station 2, for example, the cell 2, and the RRC connection establishment request may include a cause value indicating that the RRC connection is based on the voice service establishment by the UE. After the UE is handed over or redirected to the target cell, such as cell 2, the voice service connection establishment process with the core network 2 can be completed, and the UE's voice service can be transferred to the LTE network.
  • the target cell such as cell 2
  • the implementation of the above EPS fallback is based on the fact that the UE is in the connected state. If the UE is in the unconnected state, the UE needs to enter the connected state before it can fall back to the LTE cell for voice services based on the handover or redirection process. As shown in Figure 2, before S201, the process of UE entering the connected state may include S200a-S200d:
  • the core network 1 sends a paging message to the base station 1 .
  • the base station 1 sends a paging message to the UE.
  • S200c The UE establishes an RRC connection with the base station 1 .
  • S200d The UE registers with the core network 1.
  • the UE completes processes such as security activation, and establishes a QoS flow for carrying voice service control signaling with the core network 1.
  • control signaling may be session initiation protocol (session initiation protocol, SIP) signaling, for example, signaling used for dialing and ringing, and the UE may send or receive the SIP signaling through the base station.
  • SIP session initiation protocol
  • the UE can initiate a voice service through the NR cell, for example, cell 1, or can be called through the NR cell.
  • the UE in the non-connected state has significantly longer delay in completing EPS fallback, and the signaling overhead is large, and the efficiency is low, which affects the communication quality of the voice service.
  • FIG. 3 is a schematic flow chart of a communication method provided by the present application, the method including:
  • S301 The first base station acquires voice service indication information.
  • the first base station is located in an access network using the first radio access technology (hereinafter referred to as "the first access network"), for example, the first base station is located in the NR network, and the first base station is an NR base station, such as gNB .
  • the voice service indication information may also be called a voice service type indication, and is used to indicate a voice service.
  • the first base station sends a first paging message to the first UE, where the first paging message includes the voice service indication information.
  • the first base station may initiate a paging process to one or more UEs in a disconnected state, and send a first paging message to each UE respectively, where the first UE is a UE that receives the first paging message.
  • the unconnected state described in this application includes an idle state or a third state, and the third state may also be called an inactive idle state.
  • the third state the air interface connection between the UE and the serving base station Disconnected, but the UE retains various configuration information configured by the serving base station for the UE, the serving base station retains the context of the UE, and the serving base station retains the connection established for the UE with the core network, the serving base station can also be called a third-state UE The anchor base station.
  • the first base station When the first UE is in the third state, the first base station may serve as an anchor base station of the first UE. In addition, when the first UE is in an idle state, the first base station may serve as a camping base station of the first UE. In this application, both the anchor base station and the camping base station may be referred to as serving base stations.
  • the first paging message includes an information element (information element, IE), which contains the voice service indication information, wherein the information element can be a newly designed information element or multiplex an existing paging
  • IE information element
  • the information element in the call message is not specifically limited in this application.
  • the first paging message further includes the identifiers of the one or more UEs, each UE identifier may correspond to voice service indication information or correspond to a null value, if a UE identifier corresponds to a voice service Indication information, indicating that the reason for paging the UE is that the UE has voice services. If a UE ID corresponds to a null value, it indicates that the reason for paging the UE is other than voice services.
  • the null value means that the bit carrying the voice service indication information does not appear, or is a preset value (for example, 0, or null).
  • the first base station acquires the voice service indication information according to the voice service related information from the core network.
  • the core network has a communication interface with the first base station, and the radio access technology used by the first base station is the same.
  • the first base station is a gNB
  • the core network is a 5GC
  • the gNB communicates with the 5GC through an NG interface.
  • the voice service-related information is a paging message including voice service indication information.
  • the first base station receives a second paging message from the core network, where the second paging message includes the voice service indication information.
  • the first base station learns that the core network is preparing to initiate a voice service to the UE.
  • the second paging message may include an information element, where the information element includes the voice service indication information.
  • the second paging message further includes identifiers of the one or more UEs, and each UE identifier may correspond to voice service indication information or correspond to a null value. That is to say, the corresponding relationship between the voice service indication information and the UE identifier contained in the second paging message and the first paging message is the same.
  • the first base station may include part or all of the UE identities and corresponding voice service indication information in the received second paging message into the first paging message.
  • the second paging message may also include identifiers of other UEs, that is, the identifiers of UEs included in the first paging message may be identifiers of some UEs in the second paging message.
  • the first base station may page some UEs indicated by the core network through the second paging message through the first paging message, and page other UEs indicated by the core network through the second paging message through other one or more paging messages.
  • the expression manner of the voice service indication information in the first paging message may be different from that in the second paging message, for example, contained in different information elements, and/or adopt different numbers bits.
  • the first paging message and the second paging message respectively have indication information indicating that the UE is paged based on the voice service, it is within the protection scope of the present application.
  • the voice service-related information is downlink data related to the voice service.
  • the first base station receives downlink data transmitted to the terminal from the core network, the downlink data being related to the voice service; and determining the voice service indication information according to the downlink data.
  • the first base station is an anchor base station of the first UE.
  • the core network may not send the second paging message to the first base station, but directly send downlink data to the first UE through the first base station.
  • the first base station can determine whether the downlink data is related to the voice service, and if it is determined to be the downlink data of the voice service, the first base station can generate and send to the first UE a paging message carrying the aforementioned voice service indication information (that is, the first paging message).
  • the information related to the voice service is signaling related to the voice service.
  • the first base station receives signaling related to the terminal from the core network, where the signaling is related to the voice service; and determines the voice service indication information according to the signaling.
  • the core network sends signaling to the first base station to request establishment of a QoS flow for the voice service of the first UE, or request establishment or modification of a PDU session for the voice service.
  • the first base station may also send a second paging message to adjacent base stations located in the same location area, where the second paging message includes the voice service indication information.
  • the location area may be a radio access network based notification area (Radio access network based notification area, RAN based notification area).
  • the first UE sends a request message to the first base station according to the first paging message, the request message is used to request to establish or restore the RRC connection, the request message includes indication information, and the indication information is used to indicate The RRC connection is established or restored based on the voice service.
  • the voice service is indicated by the aforementioned voice service indication information.
  • the first UE is one of the one or more UEs receiving the first paging message. After receiving the first paging message, the first UE may determine whether the first paging message contains the identifier of the first UE. When the first UE determines that the first paging message contains the identity of the first UE, that is, a UE identity in the first paging message matches the identity of the first UE, the first UE determines that it is paged or called, Then the first UE determines that it needs to enter the RRC connected state, so as to perform the paged service. In addition, if the voice service indication information included in the first paging message corresponds to the identifier of the first UE, the first UE may determine that the paged service is a voice service.
  • the first UE when the first UE is in an idle state, the first UE sends an RRC connection establishment request message to the first base station, and the RRC connection establishment request message includes the indication information.
  • the first UE when the first UE is in the third state, the first UE sends an RRC connection recovery request message to the first base station, and the RRC connection recovery request message includes the indication information.
  • the indication information is an RRC connection establishment/restoration cause value in the RRC connection establishment/restoration request message.
  • RRC connection establishment/restoration cause value used to indicate the reason for RRC connection establishment/resumption initiated by the UE
  • different representations can be used to represent different RRC connection establishment/restoration reasons, for example, "mt-access” indicates RRC connection establishment The reason for/resuming is that the UE is called, and "mo-VoiceCall" indicates that the reason for establishing/resuming the RRC connection is that the UE will perform voice services.
  • the access stratum (access stratum, AS) of the UE in the third state receives the first paging message, if the UE identity contained in the first paging message is the same as that of the non-access stratum (non-access stratum, If the identifier of the first UE provided by the NAS matches, the AS will notify the NAS that the NAS provides an RRC connection establishment/restoration cause value, so that the first UE can include the cause value in the RRC connection establishment/restoration request message. However, in this application, the AS may ignore the cause value provided by the NAS and replace it with the aforementioned indication information.
  • the first base station determines, according to the indication information in the request message, to access the first UE to an access network using a second radio access technology (hereinafter referred to as "second access network"), and the second The second access network supports the first terminal to perform the voice service.
  • second access network a second radio access technology
  • the wireless access technology adopted by the second access network is different from the first access network, that is, the system is different.
  • the first base station is an NR base station
  • the second access network may be an LTE network
  • the first UE may be on the LTE network. Carry out voice services.
  • access to the second access network refers to access to a base station in the second access network, or in other words, access to a cell managed by the base station in the second access network, where the UE is waiting
  • the incoming base station may be called a target base station
  • the cell to be accessed by the UE may be called a target cell.
  • the first base station can determine that the first UE will perform voice services according to the indication information. If the capabilities of the first base station are not suitable for the UE to perform voice services, for example, the first base station itself does not support voice services, and network deployment conditions and other factors may be considered. network factors, the first base station may determine to handover or redirect the first UE to a target base station in the second access network.
  • the first base station may determine that the UE will perform voice services according to the indication information, so as to configure measurement parameters for the first UE, and the measurement parameters use The first UE measures cells managed by one or more base stations in the second access network.
  • the first base station can send the measurement parameters to the first UE after the first UE completes the core network registration (as shown in step S203), without waiting for the core network to send a QoS flow establishment request to the first base station (as shown in step S201 ), correspondingly, the first base station does not need to send a response message for the request to the core network (as shown in step S202), the first UE can measure the signal quality of each cell according to the measurement parameters, and determine the target base station according to the measurement results , or send the measurement result to the first base station, and the first base station determines the target base station, so that the UE can complete handover or redirection to the target base station. Since the first base station performs measurement configuration for the first UE in advance, the time delay for the first UE to access the target base station can be saved, and the communication quality of the voice service performed by the first UE can be improved.
  • the first base station may determine that the first UE will perform voice services according to the indication information, so as to determine a target base station/cell or an accessible frequency point in the second access network for the first UE , and notify the first UE, for example, the first base station sends indication information indicating the target base station/cell or an accessible frequency point to the first UE, so that the first UE can complete handover or redirection to the target base station .
  • the first base station directly determines the target base station/cell or accessible frequency point for the first UE, it saves the time delay for the first UE to access the target base station, and improves the communication quality of the first UE's voice service.
  • the embodiment shown in FIG. 4 is based on the embodiment shown in FIG. 3 and further describes the communication method provided by this application, and the content already described in the embodiment shown in FIG. 3 will not be repeated.
  • the first base station is base station 1
  • the second base station is base station 2
  • the first UE is UE#1.
  • the base station 1 is NR base station
  • core network 1 is 5GC
  • base station 2 is LTE base station
  • core network 2 is EPC.
  • the method includes:
  • the core network 1 sends a paging message #1 to the base station 1.
  • the paging message #1 includes one or more UE identities, wherein some or all of the UE identities correspond to voice service indication information.
  • the identifier of UE#1 corresponds to voice service indication information
  • the voice service indication information indicates that UE#1 is paged because a voice service arrives.
  • Base station 1 determines paging message #2 according to paging message #1.
  • the paging message #2 includes one or more UE identities, and voice service indication information corresponding to part or all of the UE identities.
  • S401-S402 can be replaced by S401'-S402', wherein S401' includes: the core network 1 sends a transmission to the base station 1 Downlink data to UE#1.
  • S402' includes: the base station 1 determines that the downlink data is related to the voice service, and generates a paging message #2.
  • the base station 1 sends a paging message #2 to the one or more UEs.
  • the RRC connection establishment request message is replaced by the RRC connection recovery request message.
  • Base station 1 configures measurement parameters for UE#1 according to the RRC connection establishment request message.
  • base station 1 determines that UE#1 will perform voice services according to the aforementioned RRC connection establishment cause value, but the capability of base station 1 does not support UE#1 to perform voice services, then base station 1 determines that it is necessary to trigger EPS fallback for UE#1, and will UE#1 accesses the LTE cell, and the LTE cell provides voice service communication for UE#1.
  • Base station 1 sends configured measurement parameters to UE#1.
  • S408 UE#1 performs neighbor cell measurement according to the measurement parameter, and reports the measurement result to base station #1.
  • Base station 1 determines to handover or redirect UE#1 to base station 2 according to the measurement result.
  • voice service communication can be performed between the base station 2 and the core network 2.
  • S406-S409 can be replaced by S406'-S408', wherein,
  • Base station 1 determines a target LTE base station to be accessed, such as base station 2, for UE#1 according to the RRC connection establishment request message.
  • base station 1 determines an LTE cell to be accessed or an available frequency point for UE#1.
  • Base station 1 sends indication information #1 indicating the target LTE base station to UE #1.
  • S408' UE#1 determines to access base station 2 according to indication information #1.
  • S406-S409 For the detailed description of S406-S409, S406'-S408', please refer to the relevant content of the aforementioned S304.
  • the UE sends an RRC connection establishment/restoration message including the cause value of the voice service to the serving base station, so that the serving base station can know that the UE needs to perform the voice service. If the base station does not support the voice service, Then you can determine to connect the UE to other target access networks that support voice services, and perform measurement configuration for the UE or determine candidate base stations/cells/frequency points in the target access network for the UE.
  • the base station does not need to wait for the QoS flow sent by the core network
  • the measurement configuration can be sent to the UE or the UE can be instructed to access the target access network, so that the UE can perform voice services on the target access network in a timely manner, reducing the time delay for the UE to perform voice services and improving communication quality.
  • Fig. 5 is a schematic flow chart of another communication method provided by the present application, the method includes:
  • the first base station determines a first paging message, where the first paging message includes first indication information, and the first indication information is used to instruct the UE to access a second access network using a second radio access technology .
  • the first base station is located in a first access network using the first radio access technology, for example, the first base station is located in an NR network, and the first base station is a gNB.
  • the second access network is different from the first access network in terms of wireless access technology, that is, the system.
  • the first base station is an NR base station
  • the second access network can be an LTE network
  • the first UE can perform voice over the LTE network. business.
  • the first base station determines that the terminal is paged based on the voice service according to the voice service-related information from the core network.
  • the voice service-related information is a second paging message including voice service indication information.
  • the voice service-related information is downlink data or signaling related to the voice service.
  • the first base station may base on whether it supports the voice service and other network factors, such as network deployment conditions including the cell and Whether the target cell in the second access network has the same coverage, core network capabilities, or operator policies, etc., determine the need to fall back the first UE to the second access network, that is, access the first UE to the second access network
  • the target base station so that the first base station carries the aforementioned first indication information in the paging message sent to the first UE.
  • the first indication information may be called an EPS fallback indication, and is used to instruct the first UE to access the LTE cell to perform paging of the voice service.
  • the first base station sends the first paging message to the first UE.
  • the first indication information is a displayed indication, that is, directly instructs the first UE to access the second access network to perform voice services.
  • the first paging message further includes voice service indication information.
  • voice service indication information For a detailed description of the voice service indication information, reference may be made to relevant content in the foregoing embodiments of FIG. 3-FIG. 4 .
  • the first indication information is an implicit indication, for example, the first indication information is voice service indication information.
  • the method may further include: the first UE receives third indication information from the first base station, and the third indication information may include any one or more of the following: instructing the first UE to access the second access or the indication that the first access network does not support the voice service, or the frequency point/cell information of the second access network that the first base station recommends to the first UE for the voice service, etc.
  • the third indication information is included in the system information broadcast by the first base station.
  • the first UE can determine that the first base station instructs the first UE to access the second Two access network for voice services.
  • the first paging message further includes identities of the one or more UEs, and the identities of the first UEs correspond to the first indication information.
  • the information element design in the first paging message may refer to the relevant content of the first paging message in the embodiment shown in FIG. 3 above.
  • S504 The first UE determines a target cell in the second access network according to the first indication information.
  • the first UE determines whether it is paged according to whether the second paging message carries the identifier of the first UE, and determines, according to the first indication information, that the first base station instructs the first UE to fall back to the second access network for voice services. Therefore, the first UE may select a target cell in the second access network according to conditions such as cell measurement results, and initiate an RRC connection establishment process to the base station to which the target cell belongs (ie, the target base station, referred to as the second base station in this application). It can be seen that the first UE does not need to access the first base station first and then handover or redirect from the first base station to the target base station, which reduces the time delay for performing voice services.
  • S505 The first UE accesses the target cell.
  • the first UE sends an RRC connection establishment request message to the second base station.
  • the RRC connection establishment request message includes second indication information, the second indication information is used to indicate that the RRC connection is established based on the voice service, and the function of the second indication information is similar to that in the preceding figure 3-
  • the indication information of the RRC connection establishment/restoration request message in the embodiment shown in FIG. 4 will not be described in detail.
  • the access stratum of the first UE ignores the RRC connection establishment cause value provided by the non-access stratum.
  • RRC connection establishment cause value provided by the non-access stratum.
  • the first UE may send an RRC connection resume request (RRC connection resume request) to the first base station.
  • RRC connection resume request includes voice service indication information
  • the first base station can process the first UE according to the RRC connection recovery request, such as determining another target in the second access network for the first UE access to the community.
  • the method further includes: the first base station sending candidate frequency point or cell information to the first UE.
  • the candidate frequency point or cell is a frequency point or cell of the second access network, and the candidate frequency point or cell may belong to the same candidate target base station, or may belong to different candidate target base stations.
  • the first UE may select a final access target cell from candidate frequency points or cells.
  • the candidate frequency point or cell information may be included in system information broadcast by the first base station.
  • the RRC release message sent by the first base station to the first UE may include the candidate frequency point or cell information.
  • the embodiment shown in FIG. 6 is based on the embodiment shown in FIG. 5 and further describes the communication method provided by this application, and the content described in the foregoing embodiments will not be repeated.
  • the first base station is base station 1
  • the second base station is base station 2
  • the first UE is UE#1.
  • base station 1 is an NR base station
  • core network 1 is an NC
  • base station 2 is an LTE base station
  • core network 2 is an EPC.
  • the method includes:
  • the core network 1 sends a paging message #1 to the base station 1.
  • the paging message #1 includes one or more UE identities, wherein some or all of the UE identities correspond to voice service indication information.
  • the identifier of UE#1 corresponds to voice service indication information
  • the voice service indication information indicates that UE#1 is paged because a voice service arrives.
  • Base station 1 determines paging message #2 according to paging message #1.
  • the paging message #2 includes one or more UE identities, and voice service indication information corresponding to part or all of the UE identities.
  • S601-S602 can be replaced by S601'-S602':
  • Core network 1 sends to base station 1 the downlink data transmitted to UE#1;
  • Base station 1 determines that the downlink data is related to the voice service, and generates paging message #2.
  • the base station 1 sends a paging message #2 to the one or more UEs.
  • S604 UE#1 determines to be paged based on the voice service according to the paging message #2.
  • S605 UE#1 determines a target cell, and the target cell is managed by base station 2.
  • completing the RRC connection establishment process between UE#1 and base station 2 includes: UE#1 sending an RRC connection establishment request message to base station2.
  • the RRC connection establishment request message includes an RRC connection establishment voice value indicating a voice service.
  • voice service communication can be performed between the base station 2 and the core network 2.
  • the UE After the UE receives a paging message containing voice service indication information from the base station where it is currently camping, it can know that the base station where it is camping has instructed the UE to access a network that supports the UE to perform voice services.
  • the target access network Therefore, the UE can directly initiate the access process to the base station in the target access network without accessing the resident base station or registering with the core network connected to the resident base station, so that the UE can be in the target access network in time.
  • the voice service performed by the access network reduces the time delay for the UE to perform the voice service and improves the communication quality.
  • the embodiment of the present application also provides a communication device for implementing any of the above methods, for example, providing a communication device including a unit (or means).
  • a communication device including a unit (or means).
  • FIG. 7 is a schematic diagram of a communication device provided in an embodiment of the present application.
  • the communication device may be a module for a terminal or an access network device, for example, a chip; or the communication device may be a terminal or an access network device.
  • the communication device 700 includes a processing unit 710 and a transceiver unit 720 .
  • the access network device may serve as a base station for a terminal in an unconnected state.
  • the processing unit 710 is configured to obtain voice service indication information; the transceiver unit 720 is configured to send a first paging message to the first terminal, the first paging message includes the voice service indication information, wherein the access network device Located in a first access network using a first radio access technology; and receiving a request message from a first terminal, where the request message is used to request establishment or restoration of an RRC connection, and the request message includes indication information,
  • the indication information is used to indicate that the RRC connection is established or resumed based on the voice service; the processing unit 710 is further configured to determine, according to the indication information, that the first terminal is to be accessed by the second radio access technology using the second radio access technology.
  • An access network where the second access network supports the first terminal to perform the voice service.
  • the first paging message further includes identifiers of one or more terminals, where the identifier of the first terminal corresponds to the voice service indication information, and the first terminal belongs to the one or more multiple terminals.
  • the processing unit 710 is configured to determine, according to the indication information, to switch or redirect the first terminal to a second access network device, where the second access network device is located on the second access network.
  • the processing unit 710 is configured to configure measurement parameters for the first terminal according to the indication information, where the measurement parameters are used to measure the management of one or more access network devices in the second access network. district.
  • the processing unit 710 is configured to determine a target base station or a target cell in the second access network for the first terminal according to the indication information.
  • the transceiving unit 720 is further configured to indicate the target base station or target cell to the first terminal.
  • the processing unit 710 receives a second paging message from the core network through the transceiver unit 720, where the second paging message includes the voice service indication information.
  • the processing unit 710 receives, through the transceiver unit 720, downlink data transmitted to the first terminal or signaling related to the first terminal, where the downlink data or signaling is related to the voice service; and according to The downlink data or signaling determines the voice service indication information.
  • the radio access technology used by the above core network and the first access network device is the same.
  • the transceiver unit 720 is configured to receive a first paging message from a first access network device, the first paging message includes the voice service indication information, wherein, the first access network device is located in a first access network using a first wireless access technology; and, sending a request message to the first access network device, where the request message is used to request establishment or Restoring the RRC connection, the request message includes indication information, and the indication information is used to indicate that the RRC connection is established or resumed based on the voice service.
  • the processing unit 710 is configured to execute the function of the access layer of the terminal, and the processing unit 710 ignores the RRC connection establishment cause value or the RRC connection recovery cause value provided by the non-access layer of the terminal.
  • the transceiving unit 720 is configured to receive measurement parameters from the first access network device, where the measurement parameters are used to measure cells managed by one or more access network devices in the second access network.
  • the transceiving unit 720 is configured to receive, from the first access network device, indication information for indicating a target base station or a target cell located in the second access network.
  • the processing unit 710 is configured to determine a first paging message, where the first paging message includes first indication information, and the first indication information uses Instructing the first terminal to access the second access network;
  • the transceiver unit 720 is configured to send the first paging message to the first terminal, and the first paging message is used for the first terminal to determine Accessing a target cell in a second access network; wherein, the access network device is located in a first access network using a first radio access technology, and the second access network uses a second radio access technology, The second access network supports the first terminal to perform the voice service.
  • the processing unit 710 is configured to receive a second paging message from the core network through the transceiver unit 720, where the second paging message includes voice service indication information; and determine the first paging message according to the second paging message. call message, wherein the wireless access technology used by the core network and the access network device is the same
  • the processing unit 710 is configured to receive downlink data or signaling from the core network through the transceiver unit 720, the downlink data is transmitted to the first terminal, the signaling is related to the first terminal, and the The downlink data or signaling is related to the voice service; and the first paging message is determined according to the downlink data or signaling.
  • the transceiving unit 720 is further configured to send candidate frequency point or candidate cell information to the first terminal.
  • the first indication information is voice service indication information
  • the first paging message further includes voice service indication information.
  • the transceiver unit 720 when the communication device is used in a terminal, the transceiver unit 720 is configured to receive a first paging message from a first access network device, the first paging message includes first indication information, and the The first indication information is used to instruct the first terminal to access the second access network; the processing unit 710 is configured to determine a target cell in the second access network according to the first indication information; and, access the A target cell in a second access network; wherein, the first access network device is located in a first access network using a first radio access technology, and the second access network uses a second radio access technology, The second access network supports the terminal to perform the voice service.
  • the processing unit 710 sends an RRC connection establishment request message to the second access network device to which the target cell belongs through the transceiver unit 710 .
  • the RRC connection establishment request message includes second indication information, where the second indication information is used to indicate that the RRC connection is established based on the voice service.
  • the transceiving unit 710 is configured to receive candidate frequency point or candidate cell information from the first access network device.
  • the division of units in the above device is only a division of logical functions, and may be fully or partially integrated into a physical entity or physically separated during actual implementation.
  • the above-mentioned transceiving unit 720 may be divided into a receiving unit and a sending unit.
  • the transceiver unit 720 can also be divided into a first transceiver unit for communicating with terminals and a second transceiver unit for communicating with other network devices such as base stations or core network devices.
  • the units in the above device can all be implemented in the form of software called by the processing element; they can also be implemented in the form of hardware; some units can also be implemented in the form of software called by the processing element, and some units can be implemented in the form of hardware.
  • each unit can be a separate processing element, or it can be integrated in a certain chip of the device.
  • it can also be stored in the memory in the form of a program, which is called and executed by a certain processing element of the device. Function.
  • all or part of these units can be integrated together, or implemented independently.
  • the processing element mentioned here may also be a processor, which may be an integrated circuit with signal processing capability.
  • each step of the above method or each unit above may be implemented by an integrated logic circuit of hardware in the processor element or implemented in the form of software called by the processing element.
  • the units in any of the above devices may be one or more integrated circuits configured to implement the above method, for example: one or more specific integrated circuits (Application Specific Integrated Circuit, ASIC), or, one or Multiple microprocessors (digital signal processor, DSP), or, one or more Field Programmable Gate Arrays (Field Programmable Gate Array, FPGA), or a combination of at least two of these integrated circuit forms.
  • ASIC Application Specific Integrated Circuit
  • DSP digital signal processor
  • FPGA Field Programmable Gate Array
  • the units in the device can be implemented in the form of a processing element scheduler
  • the processing element can be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processors that can call programs.
  • CPU central processing unit
  • these units can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC system-on-a-chip
  • the above unit for receiving is an interface circuit of the device for receiving signals from other devices.
  • the receiving unit is an interface circuit for the chip to receive signals from other chips or devices.
  • the above unit for sending is an interface circuit of the device for sending signals to other devices.
  • the sending unit is an interface circuit used by the chip to send signals to other chips or devices.
  • the communication device may include at least one processing element and an interface circuit, where at least one processing element is configured to execute any communication method provided in the above method embodiments.
  • the processing element can perform some or all of the steps performed by the terminal or network equipment in the first way: that is, by calling the program stored in the storage element; or in the second way: through the integrated logic circuit of the hardware in the processor element Part or all of the steps performed by the terminal or network device are executed in combination with instructions; of course, part or all of the steps performed by the terminal or network device may also be executed in combination with the first method and the second method.
  • the interface circuit may be a transceiver or an input/output interface.
  • the communication device may further include a memory for storing an instruction executed by the above-mentioned one processing element, or storing input data required by the processing element to execute the instruction, or storing data generated after the processing element executes the instruction.
  • the processing element here is the same as the above description, and can be a general-purpose processor, such as a CPU, and can also be one or more integrated circuits configured to implement the above method, such as: one or more ASICs, or, one or more microprocessors DSP, or, one or more FPGAs, etc., or a combination of at least two of these integrated circuit forms.
  • a storage element may be a memory, or may be a general term for multiple storage elements.
  • FIG. 8 is a schematic structural diagram of a network device provided in an embodiment of the present application.
  • the network device may be an access network device such as a base station, and is configured to implement the communication method provided by the above method embodiment.
  • the network device includes: an antenna 88 , a radio frequency device 820 , and a baseband device 830 .
  • the antenna 88 is connected to the radio frequency device 820 .
  • the radio frequency device 820 receives the information sent by the terminal through the antenna 88, and sends the information sent by the terminal to the baseband device 830 for processing.
  • the baseband device 830 processes the information of the terminal and sends it to the radio frequency device 820
  • the radio frequency device 820 processes the information of the terminal and sends it to the terminal through the antenna 88 .
  • the baseband device 830 may include one or more processing elements 831, including, for example, a master CPU and other integrated circuits.
  • the baseband device 830 may also include a storage element 832 and an interface 833, the storage element 832 is used to store programs and data; the interface 833 is used to exchange information with the radio frequency device 820, the interface is, for example, a common public radio interface (common public radio interface) , CPRI).
  • a common public radio interface common public radio interface
  • CPRI common public radio interface
  • the above apparatus for network equipment may be located in the baseband apparatus 830, for example, the above apparatus for network equipment may be a chip on the baseband apparatus 830, the chip includes at least one processing element and an interface circuit, wherein the processing element is used to execute the above method For each step performed by the first base station or the second base station in any of the communication methods provided in the embodiments, the interface circuit is used to communicate with other devices.
  • the unit for the network device to implement each step in the above method may be implemented in the form of a processing element scheduler, for example, the device for the network device includes a processing element and a storage element, and the processing element calls the program stored in the storage element to Execute the communication method provided by any one of the above method embodiments.
  • the storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element, or may be a storage element that is on a different chip from the processing element, that is, an off-chip storage element.
  • FIG. 9 is a schematic structural diagram of a terminal provided in an embodiment of the present application.
  • the terminal is used to implement the communication method provided in the above method embodiment.
  • the terminal includes: an antenna 910 , a radio frequency part 920 , and a signal processing part 930 .
  • the antenna 910 is connected to the radio frequency part 920 .
  • the radio frequency part 920 receives the information sent by the network device through the antenna 910, and sends the information sent by the network device to the signal processing part 930 for processing.
  • the signal processing part 930 processes the information of the terminal and sends it to the radio frequency part 920.
  • the radio frequency part 920 processes the information of the terminal and sends it to the network device through the antenna 910.
  • the signal processing part 930 is used to realize the processing of each communication protocol layer of data.
  • the signal processing part 930 may be a subsystem of the terminal, and the terminal may also include other subsystems, such as a central processing subsystem, for processing the terminal operating system and application layer; for another example, the peripheral subsystem is used for Realize the connection with other equipment.
  • the signal processing section 930 may be a separately provided chip.
  • the above devices may be located in the signal processing part 930 .
  • Signal processing section 930 may include one or more processing elements 931, including, for example, a master CPU and other integrated circuits.
  • the signal processing section 930 may further include a storage element 932 and an interface circuit 933 .
  • the storage element 932 is used to store data and programs, and the program for performing the method executed by the terminal in the above methods may or may not be stored in the storage element 932, for example, stored in a memory outside the signal processing part 930 , when in use, the signal processing part 930 loads the program into the cache for use.
  • Interface circuitry 933 is used to communicate with the device.
  • the above device can be located in the signal processing part 930, and the signal processing part 930 can be implemented by a chip, and the chip includes at least one processing element and an interface circuit, where the processing element is used to execute any communication method provided by the above method embodiment.
  • the interface circuit is used to communicate with other devices.
  • the unit that implements each step in the above method can be implemented in the form of a processing element scheduler, for example, the device includes a processing element and a storage element, and the processing element calls the program stored in the storage element to execute the above method. any method of communication.
  • the storage element may be a storage element on the same chip as the processing element, that is, an on-chip storage element.
  • the program for executing the above method executed by the terminal or network device may be stored in a storage element on a different chip from the processing element, that is, an off-chip storage element.
  • the processing element invokes or loads a program from the off-chip storage element on the on-chip storage element, so as to invoke and execute any communication method in the above method embodiments.
  • the unit of the terminal or network device that implements each step in the above method may be configured as one or more processing elements, where the processing elements may be integrated circuits, for example: one or more ASICs, or, One or more DSPs, or, one or more FPGAs, or a combination of these types of integrated circuits. These integrated circuits can be integrated together to form a chip.
  • the units for implementing each step in the above method can be integrated together and implemented in the form of a system-on-a-chip (SOC).
  • SOC chip is used to implement the above method.
  • the chip may integrate at least one processing element and a storage element, and the processing element calls the stored program of the storage element to implement the above method performed by the terminal or network device; or, the chip may integrate at least one integrated circuit for realizing The method performed by the above terminal or network device; or, the above implementation manners may be combined, the functions of some units are implemented in the form of calling programs by processing elements, and the functions of some units are implemented in the form of integrated circuits.
  • the embodiment of the present application also provides a communication system, including a first access network device and a second access network device, wherein the first access network device can perform the first communication method in any communication method provided in the above method embodiments.
  • Various steps performed by a base station, and the second access network device may perform various steps performed by the second base station in any communication method provided in the above method embodiments.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
  • Multiple appearing in the embodiments of the present application means two or more.
  • Transmit in the embodiments of the present application refers to two-way transmission, including actions of sending and/or receiving, unless otherwise specified.
  • transmission in the embodiments of the present application includes sending data, receiving data, or sending data and receiving data.
  • the data transmission here includes uplink and/or downlink data transmission.
  • Data may include information and/or signals, uplink data transmission means uplink information and/or uplink signal transmission, and downlink data transmission means downlink information and/or downlink signal transmission.
  • the terminal and/or network device may perform some or all of the steps in the embodiment of the present application, and these steps or operations are only examples. In the embodiment of the present application, other operations or various variant of the operation. In addition, each step may be performed in a different order presented in the embodiment of the present application, and it may not be necessary to perform all operations in the embodiment of the present application.

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Abstract

本申请提供一种通信方法，通信装置以及计算机存储介质，该通信方法包括：第一接入网设备获取语音业务指示信息；向第一终端发送包含所述语音业务指示信息的第一寻呼消息，从第一终端接收用于请求建立或者恢复RRC连接的请求消息，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于所述语音业务建立或恢复的，并且根据所述指示信息确定将所述第一终端接入第二接入网，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中，第二接入网采用第二无线接入技术，所述第二接入网支持所述第一终端进行所述语音业务，通过该通信方法，第一终端可以快速切换或重定向到第二接入网进行语音业务，降低了通信时延，提高通信质量。

Description

通信方法、通信装置、以及机算机存储介质 技术领域
本申请涉及通信技术领域，特别涉及一种通信方法、通信装置、以及计算机存储介质。
背景技术
在新空口(new radio，NR)通信***中，当终端进入连接态之后，若终端需要进行语音业务，NR基站可以触发终端切换或重定向到长期演进(long term evolution，LTE)小区，从而，终端可以通过LTE小区进行语音业务。该过程可以称为演进分组***回落(evolved packet system fallback，EPS fallback)。
然而，上述EPS fallback过程只适用于连接态的终端。若终端处于空闲态或者非激活态时，终端需要先进入连接态，才可以进行EPS fallback过程，整体时延长，影响终端的通信质量。
发明内容
本申请实施例提供了一种通信方法、通信装置、及计算机存储介质，用于提高语音业务的通信质量。
第一方面，本申请提供了一种通信方法，包括：第一接入网设备获取语音业务指示信息；第一接入网设备向第一终端发送第一寻呼消息，所述第一寻呼消息包含所述语音业务指示信息，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中；所述第一接入网设备接收来自于第一终端的请求消息，所述请求消息用于请求建立或者恢复无线资源控制(radio resource control，RRC)连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的；所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网，所述第二接入网支持所述第一终端进行所述语音业务。
可选地，所述第一终端处于非连接态，包括第三态或空闲态。
在第一方面的一种可能的实现方式中，所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网包括：所述第一接入网设备根据所述指示信息确定将所述第一终端切换或重定向至第二接入网设备，所述第二接入网设备位于所述第二接入网。
在第一方面的一种可能的实现方式中，所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网包括：所述第一接入网设备根据所述指示信息，为所述第一终端配置测量参数，所述测量参数用于测量所述第二接入网中的一个或多个接入网设备管理的小区。
在第一方面的一种可能的实现方式中，所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网包括：所述第一接入网设备根据所述指示信息，为所述第一终端确定所述第二接入网中的目标基站或目标小区。所述方法还包括：所述第一接入网设备向所述第一终端发送指示所述目标基站或目标小区的指示信息。
在第一方面的一种可能的实现方式中，所述第一接入网设备获取语音业务指示信息包括： 所述第一接入网设备接收来自核心网的第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第一方面的一种可能的实现方式中，所述第一接入网设备获取语音业务指示信息包括：所述第一接入网设备从核心网接收向所述第一终端传输的下行数据或与所述第一终端相关的信令，所述下行数据或所述信令与所述语音业务相关；所述第一接入网设备根据所述下行数据或所述信令确定所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。在该实施方式中，所述第一终端处于第三态。可选地，所述方法还包括：所述第一接入网设备向邻居接入网设备发送第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息。
第二方面，本申请提供了一种通信方法，包括：第一终端接收来自第一接入网设备的第一寻呼消息，所述第一寻呼消息包含语音业务指示信息，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中；第一终端向所述第一接入网设备发送请求消息，所述请求消息用于请求建立或者恢复RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的。
在第二方面的一种可能的实现方式中，所述语音业务指示信息是基于所述第一接入网设备从核心网收到的第二寻呼消息确定的，所述第二寻呼消息包含所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第二方面的一种可能的实现方式中，所述语音业务指示信息是基于所述第一接入网设备从核心网收到的下行数据或与所述第一终端相关的信令确定的，所述下行数据向所述终端传输，且所述下行数据或所述信令与所述语音业务相关，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一终端的接入层忽略所述终端的非接入层提供的RRC连接建立原因值或RRC连接恢复原因值，以所述指示信息作为RRC连接建立原因值或RRC连接恢复原因值。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一终端从所述第一接入网设备接收测量参数，所述测量参数用于测量第二接入网中的一个或多个接入网设备管理的小区。
在第二方面的一种可能的实现方式中，所述方法还包括：所述第一终端从所述第一接入网设备接收用于指示位于第二接入网的目标基站或目标小区的指示信息。
其中，所述第二接入网采用第二无线接入技术，且支持所述第一终端进行所述语音业务。终端可以接入到所述第二接入网进行语音业务。
在第一方面或者第二方面的一种可能的实现方式中，所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
在第一方面或者第二方面的一种可能的实现方式中，所述第一接入网为新空口网络，且所述第二接入网为长期演进网络。
在第一方面或者第二方面的一种可能的实现方式中，所述核心网为5G核心网。
采用上述第一方面或者第二方面所述的通信方法，终端向接入网设备发送包含语音业务原因值的RRC连接建立/恢复消息，从而，所述接入网设备可以获知终端需要进行语音业务，若接入网设备不支持语音业务，则可以确定将终端接入其他支持语音业务的目标接入网，并为终端进行测量配置或者为终端确定目标接入网中的候选接入网设备/小区/频点，所述接入网设备无需等待核心网发送的业务质量流(Qulity of Service flow，QoS flow)建立请求，即可将测量配置发送给终端或者指示终端接入目标接入网，从而终端能够及时在目标接入网进行语音业务，降低了终端进行语音业务的时延，提高了通信质量。
第三方面，本申请提供一种通信方法，包括：第一终端接收来自第一接入网设备的第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示所述第一终端接入第二接入网；所述第一终端根据所述第一指示信息，确定第二接入网中的目标小区；所述第一终端接入所述第二接入网设备；其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术所述第二接入网支持所述第一终端进行所述语音业务。
在第三方面的一种可能的实现方式中，所述第一指示信息是基于所述第一接入网设备从核心网收到的第二寻呼消息确定的，所述第二寻呼消息包含语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第三方面的一种可能的实现方式中，所述第一指示信息是基于所述第一接入网设备从核心网收到的下行数据或与所述第一终端相关的信令确定的，所述下行数据向所述第一终端传输，且所述下行数据或所述信令与所述语音业务相关，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第三方面的一种可能的实现方式中，所述第一终端接入所述第二接入网设备包括：所述第一终端向所述目标小区所属的第二接入网设备发送RRC连接建立请求消息。可选地，所述RRC连接建立请求消息中包含第二指示信息，所述第二指示信息用于指示所述RRC连接是基于所述语音业务建立的。可选地，所述第一终端的接入层忽略所述第一终端的非接入层提供的RRC连接建立原因值，以所述第二指示信息作为RRC连接建立原因值。
在第三方面的一种可能的实现方式中，所述方法还包括：接收来自所述第一接入网设备的候选频点或候选小区信息。从而，第一终端可以在候选小区中或者在候选频点对应的小区中选择目标小区进行接入。
在第三方面的一种可能的实现方式中，所述方法还包括：接收来自所述第一接入网设备的第三指示信息，所述第三指示信息用于指示所述第一接入网设备不支持语音业务；所述第一终端根据第一指示信息和第三指示信息确定接入所述第二接入网设备，其中，所述第一指示信息为语音业务指示信息。可选地，所述第三指示信息包含在所述第一接入网设备广播的***信息中。
第四方面，本申请提供了一种通信方法，包括：第一接入网设备确定第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示所述第一终端接入第二接入网；所述第一接入网设备向所述第一终端发送所述第一寻呼消息，所述第一寻呼消息用于所述第一终端确定接入第二接入网中的目标小区；其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术，所述第二接入网支持所 述第一终端进行所述语音业务。
在第四方面的一种可能的实现方式中，第一接入网设备确定第一寻呼消息包括：所述第一接入网设备从核心网接收第二寻呼消息，所述第二寻呼消息包含语音业务指示信息；所述第一接入网设备根据所述第二寻呼消息确定所述第一寻呼消息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第四方面的一种可能的实现方式中，第一接入网设备确定第一寻呼消息包括：所述第一接入网设备从核心网接收下行数据或与所述第一终端相关的信令确定，所述下行数据向所述第一终端传输，且所述下行数据或所述信令与所述语音业务相关；所述第一接入网设备根据所述下行数据或所述信令确定所述第一寻呼消息。其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
在第四方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备向所述第一终端发送候选频点或候选小区信息。可选地，可以通过***信息或者RRC连接释放消息发送所述候选频点或候选小区信息。
在第四方面的一种可能的实现方式中，所述方法还包括：所述第一接入网设备向所述第一终端发送第三指示信息，所述第三指示信息用于指示所述第一接入网设备不支持语音业务。可选地，所述第三指示信息包含在所述第一接入网设备广播的***信息中。
在第三方面或第四方面的一种可能的实现方式中，所述第一指示信息为语音业务指示信息，或者所述第一寻呼消息中还包含语音业务指示信息。
在第三方面或者第四方面的一种可能的实现方式中，所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
在第三方面或者第四方面的一种可能的实现方式中，所述第一接入网为新空口网络，且所述第二接入网为长期演进网络。
在第三方面或者第四方面的一种可能的实现方式中，所述核心网为5G核心网。
采用上述第三方面或者第四方面所述的通信方法，终端从当前驻留的接入网设备接收包含语音业务指示信息的寻呼消息后。即可获知接入网设备指示终端接入到支持终端进行语音业务的目标接入网，从而，终端无需接入驻留的接入网设备，也无需注册到驻留的接入网设备所连接的核心网，就可以直接向目标接入网中的基站发起接入过程，从而终端能够及时在目标接入网进行语音业务，降低了UE进行语音业务的时延，提高了通信质量。
第五方面，本申请还提供一种通信装置，包括用于执行以上第一方面至第四方面各个步骤的单元或模块或手段(means)。所述通信装置可以是网络设备或者用于网络设备的装置。所述网络设备可以是基站或者具有基站的部分功能的设备。
第六方面，本申请还提供一种通信装置，包括处理器和接口电路，所述处理器用于通过接口电路与其它装置通信，并执行以上第一方面至第四方面提供的方法。该处理器包括一个或多个。
第七方面，本申请还提供一种通信装置，提供一种通信装置，包括处理器，用于调用存储器中存储的程序，以执行以上第一方面至第四方面提供的方法。该存储器可以位于该装置 之内，也可以位于该装置之外。且该处理器可以是一个或多个处理器。
第八方面，本申请还提供一种计算机程序产品，该程序在被处理器调用时，以上任一方面提供的方法被执行。
此外，提供一种计算机可读存储介质，包括以上程序。
第九方面，本申请提供一种通信***，包括第一接入网设备与第二接入网设备，其中，第一接入网设备用于执行第一方面提供的方法；或者，第一接入网设备用于执行第四方面提供的方法。
附图说明
图1是本申请实施例提供的一种应用场景的示意图；
图2是本申请提供的一种EPS fallback的流程示意图；
图3是本申请提供的一种通信方法的流程示意图；
图4是本申请提供的一种通信方法的信令流程示意图；
图5是本申请提供的一种通信方法的流程示意图；
图6是本申请提供的一种通信方法的信令流程示意图；
图7是本申请实施例提供的一种通信装置700的示意图；
图8是本申请实施例提供的一种网络设备800的示意图；
图9是本申请实施例提供的一种终端900的示意图。
具体实施方式
本申请实施例中描述的技术可用于多种通信***，例如，长期演进(long term evolution，LTE)无线通信***，新空口(new radio，NR)***等第五代(5th generation，5G)移动通信***、还可以是其他下一代(next generation，NG)通信***或新型通信***等，本申请不做限定。
在本申请中，终端可以是向用户提供语音和/或数据连通性的各类设备，也可以称为终端设备、用户设备(user equipment，UE)、移动台、移动终端等。终端可以广泛应用于各种场景，例如，设备到设备(device-to-device，D2D)、车物(vehicle to everything，V2X)通信、机器类通信(machine-type communication，MTC)、物联网(internet of things，IOT)、虚拟现实、增强现实、工业控制、自动驾驶、远程医疗、智能电网、智能家具、智能办公、智能穿戴、智能交通、智慧城市等。终端可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、航空航天设备等。在本申请实施例中，应用于上述设备中的芯片也可以称为终端。以下用UE作为终端进行说明。
在本申请中，网络设备可以是基站等接入网设备。例如，网络设备可以是演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、第五代(5th generation，5G)移动通信***中的下一代基站(next generation NodeB，gNB)、第六代(6th generation，6G)移动通信***中的下一代基站、未来移动通信***中的基站等；也可以是完 成基站部分功能的模块或单元，例如，可以是集中式单元(central unit，CU)，也可以是分布式单元(distributed unit，DU)。这里的CU完成基站的无线资源控制协议和分组数据汇聚层协议(packet data convergence protocol，PDCP)的功能，还可以完成业务数据适配协议(service data adaptation protocol，SDAP)的功能；DU完成基站的无线链路控制层和介质访问控制(medium access control，MAC)层的功能，还可以完成部分物理层或全部物理层的功能，有关上述各个协议层的具体描述，可以参考第三代合作伙伴计划(3rd Generation Partnership Project，3GPP)的相关技术规范。网络设备可以是宏基站，也可以是微基站或室内站，还可以是中继节点或主节点等。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。以下用基站作为网络设备进行说明。
图1是本申请实施例提供的一种应用场景的示意图。
图1所示的基站1和基站2为分别使用不同无线接入技术(radio access technology，RAT)的基站，或者说基站1与基站2的制式不同。其中，基站1连接核心网1，基站2连接核心网2，基站1和基站2之间可以进行直接通信；或者也可以通过其他网络设备间接通信。每个基站管理一个或多个小区，每个小区的覆盖范围内可以覆盖一个或多个终端，终端通过小区接入网络设备并获取通信服务。图1中，以基站1管理小区1，基站2管理小区2，且UE接入小区1进行示意。
假设基站1使用NR无线接入技术，即基站1为NR基站，核心网1为5G核心网(5G Core，5GC)；基站2使用LTE无线接入技术，即基站2为LTE基站，核心网2为演进型分组核心网(Evolved Packet Core，EPC)。UE通过接入小区1从而建立与5GC的连接。5GC可以通过演进分组***(evolved packet system，EPS)回退(fallback)的方式为进入连接态的UE提供语音业务。EPS fallback的一种实现方式如图2所示：
S201：核心网1向基站1发送QoS flow建立请求，该QoS flow建立请求用于请求建立用于传输语音业务数据的QoS flow。
具体地，当UE主叫/被叫时，核心网1识别出UE需要进行语音业务的数据传输，则可以发起会话更新请求(protocol data unit session modification，PDU session modification)流程，在该流程中向基站1发送该QoS flow建立请求。
S202：基站1确定接收或者拒绝该QoS flow建立请求。
具体地，基站1收到QoS flow建立请求后，可以根据自身是否支持语音业务，以及其他一些已知的网络因素，例如，网络部署情况，核心网能力，运营商策略等，确定接收或者拒绝该QoS flow建立请求。
若基站1确定拒绝该QoS建立请求，则基站1执行下述S203-S204，以完成EPS fallback。
S203：基站1向核心网1发送拒绝QoS flow建立请求的指示。
S204：基站1向UE发起切换或者重定向流程，使得UE接入LTE小区进行语音业务。
假设基站1确定UE可以切换或者重定向到基站2管理的小区，即基站2作为切换或重定向的目标基站，基站2管理的小区作为切换或者重定向的目标小区。
如果基站1发起切换流程，则基站1可以在向UE发送的切换命令中，以及向基站2发送的切换准备请求中携带EPS fallback指示信息，用于指示将UE切换到基站2的小区。如果 UE发生了切换失败，UE尝试选择LTE小区进行接入，无法找到合适的LTE小区的情况下再进行RRC重建。UE在接入LTE小区时，在RRC连接建立请求消息中可以携带表示该RRC连接是基于UE进行语音业务建立的原因值。
如果基站1发起重定向流程，基站1可以在向UE发送的RRC释放消息中携带EPS fallback指示信息，用于指示将UE重定向到基站2的小区。进而，UE可以向基站2的小区，例如小区2发送RRC连接建立请求，该RRC连接建立请求中可以包括表示该RRC连接是基于UE进行语音业务建立的原因值。在UE切换或重定向到目标小区，例如小区2后，可以与核心网2完成语音业务的连接建立过程，将UE的语音业务转移到LTE网络进行。
以上EPS fallback的实现方式，是基于UE处于连接态来进行的，UE若处于非连接态时，UE需要先进入连接态，才能基于切换或者重定向流程回退到LTE小区进行语音业务。如图2所示，在S201之前，UE进入连接态的过程可以包括S200a-S200d：
S200a：核心网1向基站1发送寻呼消息。
S200b：基站1向UE发送寻呼消息。
S200c：UE与基站1建立RRC连接。
S200d：UE注册到核心网1。
UE在注册过程中，完成安全激活等流程，并与核心网1之间建立承载语音业务的控制信令的QoS flow。
其中，该控制信令可以是会话发起协议(session initiation protocol，SIP)信令，例如用于拨号振铃的信令，UE可以通过基站发送或者接收SIP信令。通过SIP信令，UE可以通过NR小区，例如小区1主叫发起语音业务，或者可以通过NR小区被叫。
可见，非连接态的UE与连接态的UE相比，完成EPS fallback的时延明显更长，信令开销大，效率低，影响语音业务的通信质量。
为了减少非连接态的UE完成EPS fallback的时延，本申请提出了一种通信方法，该通信方法可以用于图1所示的应用场景中。图3是本申请提供的一种通信方法的流程示意图，该方法包括：
S301：第一基站获取语音业务指示信息。
其中，第一基站位于采用第一无线接入技术的接入网(下文称为“第一接入网”)中，例如，第一基站位于NR网络中，第一基站为NR基站，例如gNB。
所述语音业务指示信息也可以称为语音业务类型指示，用于指示语音业务。
S302：第一基站向第一UE发送第一寻呼消息，所述第一寻呼消息包含所述语音业务指示信息。
第一基站可以向处于非连接态的一个或多个UE发起寻呼过程，分别向每个UE发送第一寻呼消息，第一UE为接收到所述第一寻呼消息的一个UE。本申请中所述的非连接态包括空闲态或者第三态，第三态也可以称为非激活态(inactive idle)，具体地，在第三态下，UE与服务基站之间的空口连接断开，但UE保留服务基站为UE配置的各类配置信息，服务基站保留UE的上下文，且服务基站保留与核心网之间为UE建立的连接，该服务基站也可以 称为第三态UE的锚点(anchor)基站。
当第一UE处于第三态时，第一基站可以作为第一UE的锚点基站。此外，当第一UE处于空闲态时，第一基站可以作为第一UE的驻留基站。在本申请中，锚点基站和驻留基站都可以称为是服务基站。
可选地，第一寻呼消息中包含一个信元(information element，IE)，该信元包含该语音业务指示信息，其中，该信元可以是新设计的信元或者复用现有的寻呼消息中的信元，本申请对此不做特别限定。
可选地，所述第一寻呼消息中还包含所述一个或多个UE的标识，每个UE的标识可以对应语音业务指示信息或者对应一个空值，如果一个UE的标识对应一个语音业务指示信息，说明寻呼该UE的原因是该UE有语音业务达到，如果一个UE的标识对应一个空值，说明寻呼该UE是由于语音业务之外的原因。其中，空值是指承载语音业务指示信息的比特位没有出现，或者为预设值(例如0,或者null)。
可选地，第一基站根据来自核心网的语音业务相关信息获取上述语音业务指示信息。其中，该核心网与第一基站具有通信接口，且与第一基站使用的无线接入技术相同。例如第一基站是gNB，该核心网是5GC，gNB与5GC之间通过NG接口通信。
例如，在一个实施方式中，所述语音业务相关信息是包含语音业务指示信息的寻呼消息。具体地，第一基站接收来自核心网的第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息。从而，第一基站获知核心网准备向UE发起语音业务。具体地，第二寻呼消息中可以包含一个信元，该信元包含该语音业务指示信息。
可选地，所述第二寻呼消息还包含所述一个或多个UE的标识，每个UE的标识可以对应语音业务指示信息或者对应一个空值。也就是说，第二寻呼消息与第一寻呼消息中包含的语音业务指示信息与UE的标识的对应关系是相同的。第一基站可以将接收到的第二寻呼消息中的部分或全部UE的标识与对应的语音业务指示信息包含在第一寻呼消息中。可以理解，第二寻呼消息中还可以包含其他UE的标识，也就是说，第一寻呼消息中包含的UE的标识可以是第二寻呼消息中的部分UE的标识。第一基站可以通过第一寻呼消息寻呼核心网通过第二寻呼消息指示的部分UE，并通过其他一条或者多条寻呼消息寻呼核心网通过第二寻呼消息指示的其他UE。
可以理解，所述语音业务指示信息在第一寻呼消息中的表示方式可以与在第二寻呼消息中的表示方式不同，例如，包含在不同的信元中，和/或，采用不同数量的比特位。只要第一寻呼消息以及第二寻呼消息中都分别具有指示UE基于语音业务被寻呼的指示信息都在本申请的保护范围内。
又例如，在一个实施方式中，所述语音业务相关信息是与语音业务相关的下行数据。具体地，第一基站从核心网接收向所述终端传输的下行数据，所述下行数据与所述语音业务相关；以及，根据所述下行数据确定所述语音业务指示信息。
具体地，当所述第一UE处于第三态时，第一基站为第一UE的锚点基站。在该场景下，核心网可以不向第一基站发送第二寻呼消息，而直接通过第一基站向第一UE发送下行数据。则第一基站可以判断该下行数据是否与语音业务相关，如果确定是语音业务的下行数据，则第一基站可以生成并向第一UE发送携带前述语音业务指示信息的寻呼消息(即第一寻呼消 息)。
又例如，在一个实施方式中，所述语音业务相关信息是与语音业务相关的信令。具体地，第一基站从核心网接收与所述终端相关的信令，所述信令与所述语音业务相关；以及，根据所述信令确定所述语音业务指示信息。示例性的，核心网向第一基站发送信令请求建立所述第一UE的语音业务的QoS flow，或请求建立或者修改语音业务的PDU session。
在该实施方式中，所述第一基站还可以向位于同一位置区域内的相邻基站发送第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息。所述位置区域可以是基于无线接入网的通知区域(Radio access network based notification area，RAN based notification area)。
S303：第一UE根据所述第一寻呼消息，向第一基站发送请求消息，该请求消息用于请求建立或者恢复RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的。
其中，所述语音业务是由前述语音业务指示信息指示的。
第一UE是接收第一寻呼消息的一个或多个UE中的一个。第一UE接收到第一寻呼消息后，可以判断第一寻呼消息中是否包含第一UE的标识。当第一UE确定第一寻呼消息中包含第一UE的标识，即第一寻呼消息中的一个UE标识与第一UE的标识匹配，则第一UE确定被寻呼或者说被叫，则第一UE确定需要进入RRC连接态，从而进行被寻呼的业务。此外，若第一寻呼消息中包含的语音业务指示信息与第一UE的标识对应，第一UE可以确定被寻呼的业务为语音业务。
可选地，当第一UE处于空闲态时，第一UE向第一基站发送RRC连接建立请求消息，所述RRC连接建立请求消息中包含所述指示信息。
可选地，当第一UE处于第三态时，第一UE向第一基站发送RRC连接恢复请求消息，所述RRC连接恢复请求消息中包含所述指示信息。
在一个实施方式中，所述指示信息是RRC连接建立/恢复请求消息中的一种RRC连接建立/恢复原因值。RRC连接建立/恢复原因值，用于指示UE发起的RRC连接建立/恢复的原因，可以用不同的表示方式代表不同的RRC连接建立/恢复原因，例如，以“mt-access”表示RRC连接建立/恢复的原因为UE被叫，以“mo-VoiceCall”表示RRC连接建立/恢复的原因为UE将进行语音业务。
当处于第三态的UE的接入层(access stratum，AS)接收到所述第一寻呼消息后，若第一寻呼消息中包含的UE标识与非接入层(non-access stratum，NAS)提供的第一UE的标识匹配，则AS会通知NAS，由NAS提供RRC连接建立/恢复原因值，从而，第一UE可以将该原因值包含在RRC连接建立/恢复请求消息中。然而，在本申请中，AS可以忽略NAS提供的原因值，替换成前述指示信息。
S304：第一基站根据所述请求消息中的指示信息确定将所述第一UE接入采用第二无线接入技术的接入网(下文称为“第二接入网”)，所述第二接入网支持所述第一终端进行所述语音业务。
其中，第二接入网与第一接入网采用的无线接入技术即制式不同，当第一基站为NR基站时，第二接入网可以是LTE网络，且第一UE可以在LTE网络进行语音业务。
可以理解，上述“接入第二接入网”是指接入第二接入网中的一个基站，或者说，接入该第二接入网中的基站管理的小区，其中，UE待接入的基站可以称为目标基站，UE待接入的小区可以称为目标小区。
具体地，第一基站根据指示信息可以确定第一UE将进行语音业务，若第一基站的能力不适合UE进行语音业务，例如，第一基站本身不支持语音业务，以及考虑网络部署情况等其他网络因素，则第一基站可以确定将所述第一UE切换或重定向至第二接入网中的目标基站。
为了实现第一UE的切换或者重定向，在一个实施方式中，第一基站可以根据所述指示信息，确定UE将进行语音业务，从而为所述第一UE配置测量参数，所述测量参数用于第一UE测量第二接入网中的一个或多个基站管理的小区。第一基站可以在第一UE完成核心网注册(如步骤S203所示)之后，将测量参数发送给第一UE，而无需等待核心网向第一基站发送QoS flow建立请求(如步骤S201所示)，相应地，第一基站也无需向核心网发送针对该请求的响应消息(如步骤S202所示)，第一UE可以根据测量参数对各小区的信号质量进行测量，根据测量结果决定目标基站，或者将测量结果发送给第一基站，由第一基站决定目标基站，从而，UE可以完成向目标基站的切换或者重定向。由于第一基站提前为第一UE进行了测量配置，可以节约第一UE接入目标基站的时延，提高第一UE进行语音业务的通信质量。
在另一个实施方式中，第一基站可以根据所述指示信息，确定第一UE将进行语音业务，从而为第一UE确定第二接入网中的目标基站/小区或可接入的频点，并通知第一UE，例如，第一基站向第一UE发送指示所述目标基站/小区或可接入的频点的指示信息，从而，第一UE可以完成向目标基站的切换或者重定向。当由第一基站直接为第一UE决定目标基站/小区或可接入的频点，节约了第一UE接入目标基站的时延，提高第一UE进行语音业务的通信质量。
图4所示实施例是对图3所示的实施例的基础上，对本申请提供的通信方法的进一步描述，在图3所示实施例中已描述的内容将不再赘述。在图4所示实施例中，第一基站为基站1，第二基站为基站2，第一UE为UE#1，当图4所示实施例应用于图1所示的应用场景中，基站1为NR基站，核心网1为5GC，基站2为LTE基站，核心网2为EPC。如图4所示，该方法包括：
S401：核心网1向基站1发送寻呼消息#1。
该寻呼消息#1中包含一个或多个UE的标识，其中，部分或全部UE的标识分别对应语音业务指示信息。例如，UE#1的标识对应语音业务指示信息，通过该语音业务指示信息，指示UE#1被寻呼的原因是有语音业务到达。
S402：基站1根据寻呼消息#1，确定寻呼消息#2。
所述寻呼消息#2中包含一个或多个UE的标识，以及与部分或全部UE的标识对应的语音业务指示信息。
关于寻呼消息#1以及寻呼消息#2的描述可以参考前述图3实施例中关于第一寻呼消息以及第二寻呼消息的介绍。
当被寻呼的UE，例如UE#1处于第三态时，在另一个实施方式中，S401-S402可以由S401’-S402’代替，其中，S401’包括：核心网1向基站1发送传输至UE#1的下行数据。
S402’包括：基站1确定该下行数据与语音业务相关，生成寻呼消息#2。
S403：基站1向所述一个或多个UE发送寻呼消息#2。
假设处于空闲态的UE#1接收到寻呼消息#2。
S404：UE#1根据寻呼消息#2确定基于语音业务被寻呼。
S405：当UE#1处于空闲态时，UE#1向基站1发送RRC连接建立请求消息，RRC连接建立请求消息包含的RRC连接建立原因值为语音业务。
当UE#1处于第三态，RRC连接建立请求消息替换为RRC连接恢复请求消息。
关于S404-S405的详细描述可以参考前述S303的内容，不做赘述。
S406：基站1根据所述RRC连接建立请求消息，为UE#1进行测量参数配置。
具体地，基站1根据前述RRC连接建立原因值，确定UE#1将进行语音业务，但基站1的能力不支持UE#1进行语音业务，则基站1确定需要为UE#1触发EPS fallback，将UE#1接入到LTE小区，由LTE小区为UE#1提供语音业务的通信。
S407：基站1向UE#1发送配置的测量参数。
S408：UE#1根据所述测量参数，进行邻区测量，并向基站#1上报测量结果。
S409：基站1根据测量结果确定将UE#1切换或者重定向到基站2。
S4010：UE#1与基站2完成RRC连接建立过程。
当UE#1接入基站2后，可以通过基站2与核心网2之间进行语音业务通信。
可选地，S406-S409可以由S406’-S408’替代，其中，
S406’：基站1根据所述RRC连接建立请求消息，为UE#1确定待接入的目标LTE基站，例如基站2。
可选地，基站1为UE#1确定待接入的LTE小区或可用的频点。
S407’：基站1向UE#1发送指示上述目标LTE基站的指示信息#1。
S408’：UE#1根据指示信息#1，确定接入到基站2。
关于S406-S409,S406’-S408’的详细描述可以参考前述S304的相关内容。
通过图3-图4实施例提供的通信方法，UE向服务基站发送包含语音业务原因值的RRC连接建立/恢复消息，从而，服务基站可以获知UE需要进行语音业务，若基站不支持语音业务，则可以确定将UE接入其他支持语音业务的目标接入网，并为UE进行测量配置或者为UE确定目标接入网中的候选基站/小区/频点，基站无需等待核心网发送的QoS flow建立请求，即可将测量配置发送给UE或者指示UE接入目标接入网，从而UE能够及时在目标接入网进行语音业务，降低了UE进行语音业务的时延，提高了通信质量。
图5是本申请提供的另一种通信方法的流程示意图，该方法包括：
S501：第一基站确定第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示UE接入采用第二无线接入技术的第二接入网。
其中，第一基站位于采用第一无线接入技术的第一接入网中，例如，第一基站位于NR网络中，第一基站为gNB。
第二接入网与第一接入网采用的无线接入技术即制式不同，当第一基站为NR基站时，第二接入网可以是LTE网络，且第一UE可以在LTE网络进行语音业务。
可选地，第一基站根据来自核心网的语音业务相关信息来确定终端基于语音业务被寻呼。在一种实现方式中，所述语音业务相关信息是包含语音业务指示信息的第二寻呼消息。在另一个实施方式中，所述语音业务相关信息是与语音业务相关的下行数据或信令。关于来自核心网的语音业务相关信息的详细描述可以参考前述图3-图4所述实施例中的相关内容。
可选地，当第一基站获知第一UE基于语音业务的原因被寻呼，第一基站可以基于自身是否支持语音业务、以及其他网络因素，例如网络部署情况包括第一接入网的小区与第二接入网中的目标小区是否同覆盖、核心网能力、或运营商策略等，判断需要将第一UE回退到第二接入网，即将第一UE接入到第二接入网中的目标基站，从而第一基站在发送给第一UE的寻呼消息中携带前述第一指示信息。
当第一基站为NR基站，第二接入网为LTE网络时，第一指示信息可以称为EPS fallback指示，用于指示第一UE接入LTE小区进行语音业务的寻呼。
S503：第一基站向第一UE发送所述第一寻呼消息。
在一个实施方式中，上述第一指示信息是显示的指示，即直接指示第一UE接入第二接入网进行语音业务。可选地，所述第一寻呼消息中还包含语音业务指示信息。关于语音业务指示信息的详细描述可以参考前述图3-图4实施例中的相关内容。
在另一个实施方式中，第一指示信息是隐式的指示，例如，所述第一指示信息为语音业务指示信息。所述方法还可以包括：第一UE接收来自第一基站的第三指示信息，所述第三指示信息可以包括以下任一一项或多项内容：指示第一UE接入到第二接入网的显示指示，或者，第一接入网不支持语音业务的指示，或者，第一基站建议第一UE进行语音业务的第二接入网的频点/小区信息等。所述第三指示信息包含在第一基站广播的***信息中。从而，第一UE根据第二寻呼消息中携带的语音业务指示信息，并且识别出当前驻留小区的***信息中包含的第三指示信息，可以判断第一基站指示第一UE接入到第二接入网进行语音业务。
可选地，所述第一寻呼消息中还包含所述一个或多个UE的标识，所述第一UE的标识对应所述第一指示信息。当所述第一指示信息为语音业务指示信息时，第一寻呼消息中的信元设计可以参考前述图3所示实施例中第一寻呼消息的相关内容。
S504：第一UE根据所述第一指示信息，确定第二接入网中的目标小区。
具体地，第一UE根据第二寻呼消息是否携带第一UE的标识，确定是否被寻呼，并根据所述第一指示信息，确定第一基站指示第一UE回退到第二接入网进行语音业务。从而，第一UE可以根据小区测量结果等条件，选择第二接入网中的目标小区，向目标小区所属的基站(即目标基站，本申请中称为第二基站)发起RRC连接建立流程。可见，第一UE无需 先接入第一基站再从第一基站切换或重定向到目标基站，降低了进行语音业务的时延。
S505：第一UE接入所述目标小区。
具体地，第一UE向第二基站发送RRC连接建立请求消息。可选地，所述RRC连接建立请求消息中包含第二指示信息，所述第二指示信息用于指示所述RRC连接是基于所述语音业务建立的，该第二指示信息的作用类似前述图3-图4所示实施例中所述RRC连接建立/恢复请求消息的指示信息，不做赘述。
可选地，所述第一UE的接入层忽略非接入层提供的RRC连接建立原因值，详细描述可以参考前述图3所示实施例。例如步骤S304中的相关内容。
可选地，在一个实施方式中，如果第一UE无法选择到合适的目标小区或者第一UE接入目标小区失败，则第一UE可以向第一基站发送RRC连接恢复请求(RRC connection resume request)，所述RRC重建请求消息中包含语音业务指示信息，则第一基站可以根据该RRC连接恢复请求，对第一UE进行处理，比如为第一UE确定第二接入网中的另一个目标小区进行接入。
可选地，在一个实施方式中，所述方法还包括：第一基站向第一UE发送候选频点或小区信息。候选频点或小区是第二接入网的频点或小区，候选频点或小区可以属于同一个候选目标基站，也可以属于不同的候选目标基站。第一UE可以在候选频点或小区中选择最终接入的目标小区。
可选地，所述候选频点或小区信息可以包含在第一基站广播的***信息中。可选地，当第一基站将第一UE从连接态转换成第三态时，第一基站向第一UE发送的RRC释放消息中可以包含所述候选频点或小区信息。
图6所示实施例是对图5所示的实施例的基础上，对本申请提供的通信方法的进一步描述，在前述实施例中已描述的内容将不再赘述。在图4所示实施例中，第一基站为基站1，第二基站为基站2，第一UE为UE#1。当图6所示实施例应用于图1所示的应用场景中，基站1为NR基站，核心网1为NC，基站2为LTE基站，核心网2为EPC。如图6所示，该方法包括：
S601：核心网1向基站1发送寻呼消息#1。
该寻呼消息#1中包含一个或多个UE的标识，其中，部分或全部UE的标识分别对应语音业务指示信息。例如，UE#1的标识对应语音业务指示信息，通过该语音业务指示信息，指示UE#1被寻呼的原因是有语音业务到达。
S602：基站1根据寻呼消息#1，确定寻呼消息#2。所述寻呼消息#2中包含一个或多个UE的标识，以及与部分或全部UE的标识对应的语音业务指示信息。
关于寻呼消息#1以及寻呼消息#2的描述可以参考前述图5实施例中关于第一寻呼消息以及第二寻呼消息的介绍。当被寻呼的UE，例如UE#1处于第三态时，在另一个实施方式中，S601-S602可以由S601’-S602’代替：
S601’：核心网1向基站1发送传输至UE#1的下行数据；
S602’：基站1确定该下行数据与语音业务相关，生成寻呼消息#2。
关于S601-S602，S601’-S602’的详细描述可以参考前述图3-图4实施例中的相关内容。
S603：基站1向所述一个或多个UE发送寻呼消息#2。
假设处于空闲态的UE#1接收到寻呼消息#2。
S604：UE#1根据寻呼消息#2确定基于语音业务被寻呼。
S605：UE#1确定目标小区，所述目标小区由基站2管理。
S606：UE#1与基站2完成RRC连接建立过程。
可选地，UE#1与基站2完成RRC连接建立过程包括：UE#1向基站2发送RRC连接建立请求消息。可选地，该RRC连接建立请求消息包括指示语音业务的RRC连接建立语音值。
当UE#1接入基站2后，可以通过基站2与核心网2之间进行语音业务通信。
采用本申请图5-图6所示的通信方法，UE从当前驻留的基站接收包含语音业务指示信息的寻呼消息后，即可获知驻留基站指示UE接入到支持UE进行语音业务的目标接入网，从而，UE无需接入驻留基站，也无需注册到驻留基站所连接的核心网，就可以直接向目标接入网中的基站发起接入过程，从而UE能够及时在目标接入网进行语音业务，降低了UE进行语音业务的时延，提高了通信质量。
本申请实施例还提供用于实现以上任一种方法的通信装置，例如，提供一种通信装置包括用以实现以上任一种方法中终端或者接入网设备所执行的各个步骤的单元(或手段)。例如，请参考图7，其为本申请实施例提供的一种通信装置的示意图。该通信装置可以为用于终端或接入网设备的模块，例如，芯片；或者该通信装置是终端或者接入网设备。如图7所示，该通信装置700包括处理单元710，收发单元720。
在一个实施方式中，当该通信装置用于接入网设备时，该接入网设备可以作为处于非连接态的终端的驻留基站。处理单元710用于获取语音业务指示信息；收发单元720用于向第一终端发送第一寻呼消息，所述第一寻呼消息包含所述语音业务指示信息，其中，所述接入网设备位于采用第一无线接入技术的第一接入网中；以及，接收来自于第一终端的请求消息，所述请求消息用于请求建立或者恢复RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的；处理单元710还用于根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网，所述第二接入网支持所述第一终端进行所述语音业务。
可选地，所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
可选地，处理单元710用于根据所述指示信息确定将所述第一终端切换或重定向至第二接入网设备，所述第二接入网设备位于所述第二接入网。
可选地，处理单元710用于根据所述指示信息，为所述第一终端配置测量参数，所述测量参数用于测量所述第二接入网中的一个或多个接入网设备管理的小区。
可选地，处理单元710用于根据所述指示信息，为所述第一终端确定所述第二接入网中的目标基站或目标小区。收发单元720还用于将所述目标基站或目标小区指示给所述第一终 端。
可选地，处理单元710通过收发单元720接收来自核心网的第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息。
可选地，处理单元710通过收发单元720接收向所述第一终端传输的下行数据或与所述第一终端相关的信令，所述下行数据或信令与所述语音业务相关；且根据所述下行数据或信令确定所述语音业务指示信息。
以上所述核心网与所述第一接入网设备使用的无线接入技术相同。
在一个实施方式中，当该通信装置用于终端时，收发单元720用于接收来自第一接入网设备的第一寻呼消息，所述第一寻呼消息包含所述语音业务指示信息，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中；以及，向所述第一接入网设备发送请求消息，所述请求消息用于请求建立或者恢复RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于所述语音业务建立或恢复的。
可选地，处理单元710用于执行所述终端的接入层的功能，所述处理单元710忽略所述终端的非接入层提供的RRC连接建立原因值或RRC连接恢复原因值。
可选地，收发单元720用于从所述第一接入网设备接收测量参数，所述测量参数用于测量第二接入网中的一个或多个接入网设备管理的小区。
可选地，收发单元720用于从所述第一接入网设备接收用于指示位于第二接入网的目标基站或目标小区的指示信息。
有关上述实施方式中接入网设备侧以及终端侧的通信装置的各个单元执行的功能的更详细的描述可以参考前述图3-图4方法实施例中第一基站或第一UE执行的步骤的介绍。
在一个实施方式中，当该通信装置用于接入网设备时，处理单元710用于确定第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示所述第一终端接入第二接入网；收发单元720用于向所述第一终端发送所述第一寻呼消息，所述第一寻呼消息用于所述第一终端确定接入第二接入网中的目标小区；其中，所述接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术，所述第二接入网支持所述第一终端进行所述语音业务。
可选地，处理单元710用于通过收发单元720从核心网接收第二寻呼消息，所述第二寻呼消息包含语音业务指示信息；根据所述第二寻呼消息确定所述第一寻呼消息，其中，所述核心网与所述接入网设备使用的无线接入技术相同
可选地，处理单元710用于通过收发单元720从核心网接收下行数据或信令，所述下行数据向所述第一终端传输，所述信令与所述第一终端相关，且所述下行数据或信令与所述语音业务相关；根据所述下行数据或信令确定所述第一寻呼消息。
可选地，收发单元720还用于向所述第一终端发送候选频点或候选小区信息。
可选地，所述第一指示信息为语音业务指示信息，或者所述第一寻呼消息中还包含语音业务指示信息。
在一个实施方式中，当该通信装置用于终端时，收发单元720用于接收来自第一接入网 设备的第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示所述第一终端接入第二接入网；处理单元710用于根据所述第一指示信息，确定第二接入网中的目标小区；以及，接入所述第二接入网中的目标小区；其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术，所述第二接入网支持所述终端进行所述语音业务。
可选地，处理单元710通过收发单元710向所述目标小区所属的第二接入网设备发送RRC连接建立请求消息。可选地，所述RRC连接建立请求消息中包含第二指示信息，所述第二指示信息用于指示所述RRC连接是基于所述语音业务建立的。
可选地，收发单元710用于接收来自所述第一接入网设备的候选频点或候选小区信息。
有关上述实施方式中接入网设备侧以及终端侧的通信装置的各个单元执行的功能的更详细的描述可以参考前述图5-图6方法实施例中第一基站或第一UE执行的步骤的介绍。
应理解以上装置中单元的划分仅仅是一种逻辑功能的划分，实际实现时可以全部或部分集成到一个物理实体上，也可以物理上分开。例如，上述收发单元720可以分为接收单元以及发送单元。当该通信装置700为接入网侧的通信装置时，收发单元720还可以分为与终端通信的第一收发单元以及与例如基站或核心网设备等其他网络设备通信的第二收发单元。
以上装置中的单元可以全部以软件通过处理元件调用的形式实现；也可以全部以硬件的形式实现；还可以部分单元以软件通过处理元件调用的形式实现，部分单元以硬件的形式实现。例如，各个单元可以为单独设立的处理元件，也可以集成在装置的某一个芯片中实现，此外，也可以以程序的形式存储于存储器中，由装置的某一个处理元件调用并执行该单元的功能。此外这些单元全部或部分可以集成在一起，也可以独立实现。这里所述的处理元件又可以成为处理器，可以是一种具有信号的处理能力的集成电路。在实现过程中，上述方法的各步骤或以上各个单元可以通过处理器元件中的硬件的集成逻辑电路实现或者以软件通过处理元件调用的形式实现。
在一个例子中，以上任一装置中的单元可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个特定集成电路(Application Specific Integrated Circuit，ASIC)，或，一个或多个微处理器(digital singnal processor，DSP)，或，一个或者多个现场可编程门阵列(Field Programmable Gate Array，FPGA)，或这些集成电路形式中至少两种的组合。再如，当装置中的单元可以通过处理元件调度程序的形式实现时，该处理元件可以是通用处理器，例如中央处理器(Central Processing Unit，CPU)或其它可以调用程序的处理器。再如，这些单元可以集成在一起，以片上***(system-on-a-chip，SOC)的形式实现。
以上用于接收的单元(例如通信单元)是一种该装置的接口电路，用于从其它装置接收信号。例如，当该装置以芯片的方式实现时，该接收单元是该芯片用于从其它芯片或装置接收信号的接口电路。以上用于发送的单元(例如发送单元或通信单元)是一种该装置的接口电路，用于向其它装置发送信号。例如，当该装置以芯片的方式实现时，该发送单元是该芯片用于向其它芯片或装置发送信号的接口电路。
在又一种实现中，本申请实施例中提供的通信装置可以包括至少一个处理元件和接口电路，其中至少一个处理元件用于执行以上方法实施例所提供的任一种通信方法。处理元件可以以第一种方式：即调用存储元件存储的程序的方式执行终端或网络设备执行的部分或全部 步骤；也可以以第二种方式：即通过处理器元件中的硬件的集成逻辑电路结合指令的方式执行终端或网络设备执行的部分或全部步骤；当然，也可以结合第一种方式和第二种方式执行终端或网络设备执行的部分或全部步骤。可以理解的是，接口电路可以为收发器或输入输出接口。可选的，该通信装置还可以包括存储器，用于存储上述一个处理元件执行的指令或存储处理元件运行指令所需要的输入数据或存储处理元件运行指令后产生的数据。
这里的处理元件同以上描述，可以是通用处理器，例如CPU，还可以是被配置成实施以上方法的一个或多个集成电路，例如：一个或多个ASIC，或，一个或多个微处理器DSP，或，一个或者多个FPGA等，或这些集成电路形式中至少两种的组合。存储元件可以是一个存储器，也可以是多个存储元件的统称。
请参考图8，其为本申请实施例提供的一种网络设备的结构示意图。该网络设备可以是基站等接入网设备，用于执行以上方法实施例提供的通信方法。如图8所示，该网络设备包括：天线88、射频装置820、基带装置830。天线88与射频装置820连接。在上行方向上，射频装置820通过天线88接收终端发送的信息，将终端发送的信息发送给基带装置830进行处理。在下行方向上，基带装置830对终端的信息进行处理，并发送给射频装置820，射频装置820对终端的信息进行处理后经过天线88发送给终端。
基带装置830可以包括一个或多个处理元件831，例如，包括一个主控CPU和其它集成电路。此外，该基带装置830还可以包括存储元件832和接口833，存储元件832用于存储程序和数据；接口833用于与射频装置820交互信息，该接口例如为通用公共无线接口(common public radio interface，CPRI)。以上用于网络设备的装置可以位于基带装置830，例如，以上用于网络设备的装置可以为基带装置830上的芯片，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上方法实施例提供的任一种通信方法中第一基站或第二基站执行的各个步骤，接口电路用于与其它装置通信。在一种实现中，网络设备实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如用于网络设备的装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上任一方法实施例提供的通信方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件，也可以为与处理元件处于不同芯片上的存储元件，即片外存储元件。
请参考图9，其为本申请实施例提供的一种终端的结构示意图。该终端用于实现以上方法实施例提供的通信方法。如图9所示，该终端包括：天线910、射频部分920、信号处理部分930。天线910与射频部分920连接。在下行方向上，射频部分920通过天线910接收网络设备发送的信息，将网络设备发送的信息发送给信号处理部分930进行处理。在上行方向上，信号处理部分930对终端的信息进行处理，并发送给射频部分920，射频部分920对终端的信息进行处理后经过天线910发送给网络设备。
信号处理部分930用于实现对数据各通信协议层的处理。信号处理部分930可以为该终端的一个子***，则该终端还可以包括其它子***，例如中央处理子***，用于实现对终端操作***以及应用层的处理；再如，周边子***用于实现与其它设备的连接。信号处理部分930可以为单独设置的芯片。可选的，以上的装置可以位于信号处理部分930。
信号处理部分930可以包括一个或多个处理元件931，例如，包括一个主控CPU和其它集成电路。此外，该信号处理部分930还可以包括存储元件932和接口电路933。存储元件932用于存储数据和程序，用于执行以上方法中终端所执行的方法的程序可能存储，也可能不存储于该存储元件932中，例如，存储于信号处理部分930之外的存储器中，使用时信号处理部分930加载该程序到缓存中进行使用。接口电路933用于与装置通信。以上装置可以位于信号处理部分930，该信号处理部分930可以通过芯片实现，该芯片包括至少一个处理元件和接口电路，其中处理元件用于执行以上方法实施例提供的任一种通信方法中终端执行的各个步骤，接口电路用于与其它装置通信。在一种实现中，实现以上方法中各个步骤的单元可以通过处理元件调度程序的形式实现，例如该装置包括处理元件和存储元件，处理元件调用存储元件存储的程序，以执行以上方法实施例提供的任一种通信方法。存储元件可以为处理元件处于同一芯片上的存储元件，即片内存储元件。
在另一种实现中，用于执行以上终端或网络设备所执行的方法的程序可以在与处理元件处于不同芯片上的存储元件，即片外存储元件。此时，处理元件从片外存储元件调用或加载程序于片内存储元件上，以调用并执行以上方法实施例中的任一种通信方法。
在又一种实现中，终端或网络设备实现以上方法中各个步骤的单元可以是被配置成一个或多个处理元件，这里的处理元件可以为集成电路，例如：一个或多个ASIC，或，一个或多个DSP，或，一个或者多个FPGA，或者这些类集成电路的组合。这些集成电路可以集成在一起，构成芯片。
实现以上方法中各个步骤的单元可以集成在一起，以片上***(system-on-a-chip，SOC)的形式实现，该SOC芯片，用于实现以上方法。该芯片内可以集成至少一个处理元件和存储元件，由处理元件调用存储元件的存储的程序的形式实现以上终端或网络设备执行的方法；或者，该芯片内可以集成至少一个集成电路，用于实现以上终端或网络设备执行的方法；或者，可以结合以上实现方式，部分单元的功能通过处理元件调用程序的形式实现，部分单元的功能通过集成电路的形式实现。
本申请实施例还提供了一种通信***，包括第一接入网设备与第二接入网设备，其中，第一接入网设备可以执行以上方法实施例提供的任一种通信方法中第一基站执行的各个步骤，以及，第二接入网设备可以执行以上方法实施例提供的任一种通信方法中第二基站执行的各个步骤。
本领域普通技术人员可以理解：实现上述方法实施例的全部或部分步骤可以通过程序指令相关的硬件来完成，前述的程序可以存储于计算机可读取存储介质中，该程序在执行时，执行包括上述方法实施例的步骤；而前述的存储介质包括：ROM、RAM、磁碟或者光盘等各种可以存储程序代码的介质。
应理解，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。
应理解，在本发明实施例中，“与A对应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
本申请实施例中出现的“多个”是指两个或两个以上。
本申请实施例中出现的第一、第二等描述，仅作示意与区分描述对象之用，没有次序之分，也不表示本申请实施例中对描述的对象个数的特别限定，不能构成对本申请实施例的任何限制。
本申请实施例中出现的“传输”(transmit/transmission)如无特别说明，是指双向传输，包含发送和/或接收的动作。具体地，本申请实施例中的“传输”包含数据的发送，数据的接收，或者数据的发送和数据的接收。或者说，这里的数据传输包括上行和/或下行数据传输。数据可以包括信息和/或信号，上行数据传输即上行信息和/或上行信号传输，下行数据传输即下行信息和/或下行信号传输。
本申请的各个实施例中的内容可以相互参考，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
可以理解的，本申请实施例中，终端和/或网络设备可以执行本申请实施例中的部分或全部步骤，这些步骤或操作仅是示例，本申请实施例中，还可以执行其它操作或者各种操作的变形。此外，各个步骤可以按照本申请实施例呈现的不同的顺序来执行，并且有可能并非要执行本申请实施例中的全部操作。

Claims (47)

  1. 一种通信方法，其特征在于，包括：
    第一接入网设备获取语音业务指示信息；
    所述第一接入网设备向第一终端发送第一寻呼消息，所述第一寻呼消息包含所述语音业务指示信息，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中；
    所述第一接入网设备接收来自于第一终端的请求消息，所述请求消息用于请求建立或者恢复无线资源控制RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的；
    所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网，所述第二接入网支持所述第一终端进行所述语音业务。
  2. 根据权利要求1所述的方法，其特征在于，所述第一接入网设备根据所述指示信息确定将所述第一终端接入采用第二无线接入技术的第二接入网包括：
    所述第一接入网设备根据所述指示信息确定将所述第一终端切换或重定向至第二接入网设备，所述第二接入网设备位于所述第二接入网。
  3. 根据权利要求1或2所述的方法，其特征在于，所述第一接入网设备根据所述指示信息确定将所述第一终端采用第二无线接入技术的第二接入网包括：
    所述第一接入网设备根据所述指示信息，为所述第一终端配置测量参数，所述测量参数用于测量所述第二接入网中的一个或多个接入网设备管理的小区。
  4. 根据权利要求1-3任一所述的方法，其特征在于，所述第一接入网设备获取语音业务指示信息包括：
    所述第一接入网设备接收来自核心网的第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  5. 根据权利要求1-3任一所述的方法，其特征在于，所述第一接入网设备获取语音业务指示信息包括：
    所述第一接入网设备从核心网接收向所述第一终端传输的下行数据或接收与所述第一终端相关的信令，所述下行数据或所述信令与所述语音业务相关；
    所述第一接入网设备根据所述下行数据或所述信令确定所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  6. 根据权利要求5所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向邻居接入网设备发送第二寻呼消息，所述第二寻呼消息包含所述语音业务指示信息。
  7. 根据权利要求1-6任一所述的方法，其特征在于，
    所述第一接入网为新空口NR网络，且所述第二接入网为长期演进LTE网络。
  8. 根据所述权利要求4所述的方法，其特征在于，所述核心网为5G核心网。
  9. 根据权利要求1-8任一所述的方法，其特征在于，
    所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
  10. 根据权利要求1-9任一所述的方法，其特征在于，所述第一终端处于第三态。
  11. 一种通信方法，其特征在于，包括：
    第一终端接收来自第一接入网设备的第一寻呼消息，所述第一寻呼消息包含语音业务指示信息，其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网中；
    所述第一终端向所述第一接入网设备发送请求消息，所述请求消息用于请求建立或者恢复无线资源控制RRC连接，所述请求消息中包含指示信息，所述指示信息用于指示所述RRC连接是基于语音业务建立或恢复的。
  12. 根据权利要求11所述的方法，其特征在于，所述语音业务指示信息是基于所述第一接入网设备从核心网收到的第二寻呼消息确定的，所述第二寻呼消息包含所述语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  13. 根据权利要求11所述的方法，其特征在于，，所述语音业务指示信息是基于所述第一接入网设备从核心网收到的下行数据或与所述第一终端相关的信令确定的，所述下行数据向所述终端传输，且所述下行数据或所述信令与所述语音业务相关，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  14. 根据权利要求11-13任一所述的方法，其特征在于，所述方法还包括：
    所述第一终端的接入层忽略所述终端的非接入层提供的RRC连接建立原因值或RRC连接恢复原因值，以所述指示信息作为RRC连接建立原因值或RRC连接恢复原因值。
  15. 根据权利要求11-14任一所述的方法，其特征在于，所述方法还包括：
    所述第一终端从所述第一接入网设备接收测量参数，所述测量参数用于测量第二接入网中的一个或多个接入网设备管理的小区。
  16. 根据权利要求11-15任一所述的方法，其特征在于，所述方法还包括：
    所述第一终端从所述第一接入网设备接收用于指示位于第二接入网的目标基站或目标小区的指示信息，其中，所述第二接入网采用第二无线接入技术，且支持所述第一终端进行所述语音业务。
  17. 根据权利要求11-16任一所述的方法，其特征在于，所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
  18. 根据权利要求11-17任一所述的方法，其特征在于，所述第一接入网为新空口NR网络，且所述第二接入网为长期演进LTE网络。
  19. 一种通信方法，其特征在于，包括:
    第一终端接收来自第一接入网设备的第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指示信息用于指示所述第一终端接入第二接入网；
    所述第一终端根据所述第一指示信息，确定第二接入网中的目标小区；
    所述第一终端接入所述目标小区；
    其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术，所述第二接入网支持所述第一终端进行所述语音业务。
  20. 根据权利要求19所述的方法，其特征在于，所述第一指示信息是基于所述第一接入网设备从核心网收到的第二寻呼消息确定的，所述第二寻呼消息包含语音业务指示信息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  21. 根据权利要求19所述的方法，其特征在于，所述第一指示信息是基于所述第一接入网设备从核心网收到的下行数据或信令确定的，所述下行数据向所述第一终端传输，所述信令与所述第一终端相关，且所述下行数据或所述信令与所述语音业务相关，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  22. 根据权利要求19-21任一所述的方法，其特征在于，所述第一终端接入所述第二接入网中的目标小区包括：
    所述第一终端向所述目标小区所属的第二接入网设备发送无线资源控制RRC连接建立请求消息。
  23. 根据权利要求22所述的方法，其特征在于，所述RRC连接建立请求消息中包含第二指示信息，所述第二指示信息用于指示所述RRC连接是基于所述语音业务建立的。
  24. 根据权利要求21-23任一所述的方法，其特征在于，所述方法还包括：
    所述第一终端的接入层忽略所述第一终端的非接入层提供的RRC连接建立原因值。
  25. 根据权利要求19-24任一所述的方法，所述第一指示信息为语音业务指示信息，所述方法还包括：
    所述第一终端接收来自第一接入网设备的第三指示信息，所述第三指示信息用于指示所述第一接入网设备不支持语音业务；
    所述第一终端根据第一指示信息和第三指示信息，确定第二接入网中的目标小区。
  26. 根据权利要求19-25任一所述的方法，其特征在于，所述方法还包括：
    接收来自所述第一接入网设备的候选频点或候选小区信息。
  27. 根据权利要求19-26任一所述的方法，其特征在于，
    所述第一接入网为新空口NR网络，且所述第二接入网为长期演进LTE网络。
  28. 根据权利要求19-27任一所述的方法，其特征在于，
    所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
  29. 根据权利要求19-28任一所述的方法，其特征在于，所述第一终端处于第三态。
  30. 一种通信方法，其特征在于，包括：
    第一接入网设备确定第一寻呼消息，所述第一寻呼消息包含第一指示信息，所述第一指 示信息用于指示所述第一终端接入第二接入网；
    所述第一接入网设备向所述第一终端发送所述第一寻呼消息，所述第一寻呼消息用于所述第一终端确定接入第二接入网中的目标小区；
    其中，所述第一接入网设备位于采用第一无线接入技术的第一接入网，所述第二接入网采用第二无线接入技术，所述第二接入网支持所述第一终端进行所述语音业务。
  31. 根据权利要求30所述的方法，其特征在于，所述第一接入网设备确定第一寻呼消息包括：
    所述第一接入网设备从核心网接收第二寻呼消息，所述第二寻呼消息包含语音业务指示信息；
    所述第一接入网设备根据所述第二寻呼消息确定所述第一寻呼消息，其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  32. 根据权利要求30所述的方法，其特征在于，所述第一接入网设备确定第一寻呼消息包括：所
    述第一接入网设备从核心网接收下行数据或与所述第一终端相关的信令确定，所述下行数据向所述第一终端传输，且所述下行数据或所述信令与所述语音业务相关；
    所述第一接入网设备根据所述下行数据或所述信令确定所述第一寻呼消息，
    其中，所述核心网与所述第一接入网设备使用的无线接入技术相同。
  33. 根据权利要求30-32任一所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备向所述第一终端发送候选频点或候选小区信息。
  34. 根据权利要求30-33任一所述的方法，其特征在于，所述方法还包括：所述第一接入网设备向所述第一终端发送第三指示信息，所述第三指示信息用于指示所述第一接入网设备不支持语音业务。
  35. 根据权利要求30-34任一所述的方法，其特征在于，所述第一指示信息为语音业务指示信息，或者所述第一寻呼消息中还包含语音业务指示信息。
  36. 根据权利要求30-35任一所述的方法，其特征在于，所述第一寻呼消息中还包括一个或多个终端的标识，其中，所述第一终端的标识与所述语音业务指示信息对应，所述第一终端属于所述一个或多个终端。
  37. 根据权利要求30-36任一所述的方法，其特征在于，所述第一接入网为新空口NR网络，且所述第二接入网为长期演进LTE网络。
  38. 一种通信装置，其特征在于，包括用于执行如权利要求1-10或30-37中任一项所述方法的单元或模块。
  39. 一种通信装置，其特征在于，包括用于执行如权利要求11-29中任一项所述方法的单元或模块。
  40. 一种通信装置，包括处理器，其特征在于，所述处理器用于执行如权利要求1-10或30-37中任一项所述的方法。
  41. 一种通信装置，包括处理器，其特征在于，所述处理器用于执行如权利要求11-29中任一项所述的方法。
  42. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，当所述计算机程序被通信装置运行时，使得所述通信装置执行如权利要求1-37中任一项所述的方法。
  43. 一种计算机程序产品，其特征在于，当所述计算机程序产品被通信装置运行时，使得所述通信装置执行如权利要求1-37中任一项所述的方法。
  44. 一种通信***，其特征在于，包括第一接入网设备与第二接入网设备，其中，所述第一接入网设备用于执行如权利要求1-10中任一项所述的方法。
  45. 根据权利要求44所述的通信***，其特征在于，还包括终端设备，所述终端设备用于执行如权利要求11-18中任一项所述的方法。
  46. 一种通信***，其特征在于，包括第一接入网设备与第二接入网设备，其中，所述第一接入网设备用于执行如权利要求30-37中任一项所述的方法。
  47. 根据权利要求46所述的通信***，其特征在于，还包括终端设备，所述终端设备用于执行如权利要求19-29中任一项所述的方法。
PCT/CN2022/125828 2021-10-19 2022-10-18 通信方法、通信装置、以及机算机存储介质 WO2023066223A1 (zh)

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