WO2023071320A1 - 一种保障语音业务的方法及通信装置 - Google Patents

一种保障语音业务的方法及通信装置 Download PDF

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Publication number
WO2023071320A1
WO2023071320A1 PCT/CN2022/107440 CN2022107440W WO2023071320A1 WO 2023071320 A1 WO2023071320 A1 WO 2023071320A1 CN 2022107440 W CN2022107440 W CN 2022107440W WO 2023071320 A1 WO2023071320 A1 WO 2023071320A1
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Prior art keywords
network element
indication information
access
mobility management
communication
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PCT/CN2022/107440
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English (en)
French (fr)
Inventor
林玮健
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华为技术有限公司
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Publication of WO2023071320A1 publication Critical patent/WO2023071320A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/24—Negotiating SLA [Service Level Agreement]; Negotiating QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service

Definitions

  • the present application relates to the technical field of communication, and in particular to a method and a communication device for guaranteeing a voice service.
  • Voice service is the operator's implementation of various new functions on the basis of the original voice basic call, including but not limited to: call waiting, call hold, call forwarding, call forwarding, group line access, incoming call restriction, outgoing call Restriction, call backup, call waiting reminder.
  • Embodiments of the present application provide a method and a communication device for guaranteeing a voice service, so as to guarantee the communication quality of the voice service.
  • the embodiment of the present application provides a method for guaranteeing a voice service, and the method may be executed by a communication network element or a module (such as a chip) applied to the communication network element.
  • the method includes: the communication network element receives indication information, and the indication information is used to indicate that the target process is related to the voice service; the communication network element processes the target process preferentially according to the indication information.
  • the communication network element can prioritize the target process related to the voice service according to the received instruction information, thereby ensuring the high priority processing of the voice service, helping to improve the communication quality of the voice service and user experience.
  • the communication network element preferentially processes the target process according to the indication information.
  • the target process is the Evolved Packet System EPS fallback handover process.
  • the communication network element is an access and mobility management functional network element; the access and mobility management functional network element receives a handover request message from an access network device of the new wireless NR, and the handover The demand message includes this indication information.
  • the communication network element is a mobility management entity; the mobility management entity receives a redirection request message from an access and mobility management functional network element, and the redirection request message includes the indication information.
  • the communication network element is a long term evolution LTE access network device; the access network device receives a handover request message from a mobility management entity, and the handover request message includes the indication information.
  • the access and mobility management function network element, the mobility management entity, and the LTE access network equipment receive the indication information indicating that the target process is related to the voice service, and can Prioritize the EPS fallback process related to the voice service, and the NR access network equipment can also give priority to the EPS fallback process related to the voice service, thereby ensuring the high priority processing of the voice service and helping to improve the voice service Improve communication quality and improve user experience.
  • the target process is the EPS fallback reselection process.
  • the communication network element is an access and mobility management function network element; the access and mobility management function network element receives a context request message from a mobility management entity, and the context request message includes the Instructions.
  • the access and mobility management function network element receives the instruction information indicating that the target process is related to the voice service, and can give priority to the EPS fallback reselection related to the voice service
  • the mobility management entity can also prioritize the EPS fallback reselection process related to the voice service according to the voice instruction, so as to ensure the high priority processing of the voice service, help to improve the communication quality of the voice service, and improve the user experience.
  • the target flow is an N2 handover flow.
  • the communication network element is an access and mobility management function network element; the access and mobility management function network element receives a handover request message from a source access network device, and the handover request message includes The instructions.
  • the target access and mobility management functional network element receives a context establishment message from the source access and mobility management functional network element, and the context establishment message includes the indication information.
  • the access and mobility management function network element and the target access network device receive the indication information indicating that the target process is related to the voice service, and can prioritize the processing of the voice service-related
  • the N2 handover process, and the source access network equipment can also prioritize the N2 handover process related to the voice service, so as to ensure the high priority processing of the voice service, help to improve the communication quality of the voice service, and improve the user experience.
  • the target process is an Xn switching process.
  • the communication network element is an access and mobility management function network element; the access and mobility management function network element receives a path switching message from a target access network device, and the path switching message includes The instructions.
  • the access and mobility management function network element receives the indication information indicating that the target process is related to the voice service, and can preferentially process the Xn handover process related to the voice service, and the target Access network equipment can also prioritize the Xn handover process related to voice services, thereby ensuring high-priority processing of voice services, helping to improve the communication quality of voice services and user experience.
  • the embodiment of the present application provides a communication device, which may be a session management network element or a module (such as a chip) applied to the session management network element.
  • the device has the function of realizing any realization method of the first aspect above. This function may be implemented by hardware, or may be implemented by executing corresponding software on the hardware.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the embodiment of the present application provides a communication device, including a processor and a memory; the memory is used to store computer instructions, and when the device is running, the processor executes the computer instructions stored in the memory, so that the device performs Any implementation method in the first aspect above.
  • an embodiment of the present application provides a communication device, including a unit or means (means) for performing each step of any implementation method in the first aspect.
  • an embodiment of the present application provides a communication device, including a processor and an interface circuit, the processor is configured to communicate with other devices through the interface circuit, and execute any implementation method in the first aspect above.
  • the processor includes one or more.
  • an embodiment of the present application provides a communication device, including a processor coupled to a memory, and the processor is configured to invoke a program stored in the memory to execute any implementation method in the first aspect above.
  • the memory may be located within the device or external to the device. And there may be one or more processors.
  • the embodiment of the present application also provides a computer-readable storage medium, where instructions are stored in the computer-readable storage medium, and when the computer-readable storage medium is run on a communication device, any implementation method in the above-mentioned first aspect is executed implement.
  • an embodiment of the present application further provides a computer program product, the computer program product includes a computer program or an instruction, and when the computer program or instruction is run by a communication device, any implementation method in the above first aspect is executed.
  • the embodiment of the present application further provides a chip system, including: a processor, configured to execute any implementation method in the first aspect above.
  • Figure 1(a) is a schematic diagram of a 5G network architecture based on a service architecture
  • Figure 1(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface
  • FIG. 2 is a schematic flowchart of a method for guaranteeing a voice service provided in an embodiment of the present application
  • FIG. 3 is a schematic flowchart of a method for guaranteeing a voice service provided by an embodiment of the present application
  • FIG. 4 is a schematic flowchart of a method for guaranteeing a voice service provided in an embodiment of the present application
  • FIG. 5(a) is a schematic flow diagram of a method for guaranteeing a voice service provided by an embodiment of the present application
  • FIG. 5(b) is a schematic flow diagram of a method for guaranteeing a voice service provided by an embodiment of the present application
  • FIG. 6 is a schematic flowchart of a method for guaranteeing a voice service provided in an embodiment of the present application
  • FIG. 7 is a schematic diagram of a communication device provided in an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a communication device provided by an embodiment of the present application.
  • Figure 1(a) is a schematic diagram of the fifth generation (5th generation, 5G) network architecture based on the service architecture.
  • the 5G network architecture shown in Figure 1(a) may include terminal equipment, access network equipment, and core network equipment.
  • the terminal device accesses the data network (data network, DN) through the access network device and the core network device.
  • data network data network
  • the core network equipment includes some or all of the following network elements: unified data management (unified data management, UDM) network elements, unified database (unified data repository, UDR) network elements, network exposure function (network exposure function, NEF) Network element (not shown in the figure), application function (application function, AF) network element, policy control function (policy control function, PCF) network element, access and mobility management function (access and mobility management function, AMF) A network element, a session management function (session management function, SMF) network element, a user plane function (user plane function, UPF) network element, a network storage function (network repository function, NRF) network element (not shown in the figure).
  • the access network device may be a radio access network (radio access network, RAN) device.
  • radio access network radio access network
  • base station base station
  • evolved base station evolved NodeB, eNodeB
  • transmission reception point transmission reception point
  • TRP transmission reception point
  • next generation base station next generation NodeB, gNB
  • a unit for example, may be a centralized unit (CU) or a distributed unit (DU).
  • the radio access network equipment may be a macro base station, a micro base station or an indoor station, or a relay node or a donor node.
  • the embodiment of the present application does not limit the specific technology and specific equipment form adopted by the radio access network equipment.
  • the terminal device may be a user equipment (user equipment, UE), a mobile station, a mobile terminal, and the like.
  • Terminal devices 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, automatic driving, telemedicine, smart grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc.
  • Terminal devices can be mobile phones, tablet computers, computers with wireless transceiver functions, wearable devices, vehicles, urban air vehicles (such as drones, helicopters, etc.), ships, robots, robotic arms, smart home devices, etc.
  • Access network equipment and terminal equipment can be fixed or mobile. Access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and artificial satellites in the air.
  • the embodiments of the present application do not limit the application scenarios of the access network device and the terminal device.
  • the AMF network element includes functions such as mobility management and access authentication/authorization. In addition, it is also responsible for transferring user policies between terminal equipment and PCF.
  • the SMF network element includes the functions of executing session management, executing control policies issued by PCF, selecting UPF, and assigning Internet Protocol (IP) addresses to terminal devices.
  • IP Internet Protocol
  • the UPF network element as the interface with the data network, includes functions such as user plane data forwarding, session/flow-based accounting statistics, and bandwidth limitation.
  • UDM network element including the execution management of subscription data, user access authorization and other functions.
  • the UDR network element includes the access function for performing subscription data, policy data, application data and other types of data.
  • NEF network elements are used to support the opening of capabilities and events.
  • the AF network element transmits the requirements from the application side to the network side, such as QoS requirements or user status event subscription.
  • the AF can be a third-party functional entity, or an application server deployed by an operator.
  • PCF network elements include policy control functions such as charging for sessions and service flow levels, QoS bandwidth guarantee, mobility management, and terminal equipment policy decisions.
  • the NRF network element can be used to provide a network element discovery function, and provide network element information corresponding to the network element type based on the request of other network elements.
  • NRF network elements also provide network element management services, such as network element registration, update, de-registration, and network element status subscription and push.
  • DN is a network outside the operator's network.
  • the operator's network can access multiple DNs, and various services can be deployed on the DN, which can provide data and/or voice services for terminal equipment.
  • DN is a private network of a smart factory.
  • the sensors installed in the workshop of the smart factory can be terminal devices.
  • the control server of the sensor is deployed in the DN, and the control server can provide services for the sensor.
  • the sensor can communicate with the control server, obtain instructions from the control server, and transmit the collected sensor data to the control server according to the instructions.
  • DN is a company's internal office network, and the mobile phone or computer of the company's employees can be a terminal device, and the employee's mobile phone or computer can access information and data resources on the company's internal office network.
  • Nudr, Npcf, Namf, Nudm, Nsmf, and Naf are the service-oriented interfaces provided by the above-mentioned UDR, PCF, AMF, UDM, SMF, and AF, respectively, and are used to call corresponding service-oriented operations.
  • N1, N2, N3, N4, and N6 are interface serial numbers. The meanings of these interface serial numbers are as follows:
  • N1 the interface between the AMF network element and the terminal device, which can be used to transmit non-access stratum (non access stratum, NAS) signaling (such as including QoS rules from the AMF network element) to the terminal device.
  • non-access stratum non access stratum, NAS
  • N2 the interface between the AMF network element and the access network device, which can be used to transfer radio bearer control information from the core network side to the access network device.
  • N3 the interface between the access network device and the UPF network element, mainly used to transfer the uplink and downlink user plane data between the access network device and the UPF network element.
  • N4 The interface between the SMF network element and the UPF network element, which can be used to transfer information between the control plane and the user plane, including controlling the delivery of forwarding rules, QoS rules, and traffic statistics rules for the user plane, as well as User plane information reporting.
  • N6 the interface between the UPF network element and the DN, used to transmit the uplink and downlink user data flow between the UP network element F and the DN.
  • Figure 1(b) is a schematic diagram of a 5G network architecture based on a point-to-point interface.
  • the introduction of the functions of the network elements can refer to the introduction of the functions of the corresponding network elements in Figure 1(a), and will not be repeated here.
  • the main difference between Figure 1(b) and Figure 1(a) is that the interface between each control plane network element in Figure 1(a) is a service interface, and each control plane network element in Figure 1(b) The interface between them is a point-to-point interface.
  • N5 the interface between the AF network element and the PCF network element, which can be used for issuing application service requests and reporting network events.
  • N7 the interface between the PCF network element and the SMF network element, which can be used to deliver protocol data unit (protocol data unit, PDU) session granularity and service data flow granularity control policy.
  • protocol data unit protocol data unit, PDU
  • N8 The interface between the AMF network element and the UDM network element, which can be used for the AMF network element to obtain access and mobility management-related subscription data and authentication data from the UDM network element, and for the AMF network element to register with the UDM network element Information related to the current mobility management of the terminal device, etc.
  • N9 UPF network element and user plane interface between UPF network elements, used to transmit uplink and downlink user data flows between UPF network elements.
  • N10 the interface between the SMF network element and the UDM network element, which can be used for the SMF network element to obtain session management related contract data from the UDM network element, and for the SMF network element to register the current session related information of the terminal device with the UDM network element.
  • N11 The interface between the SMF network element and the AMF network element, which can be used to transfer the PDU session tunnel information between the access network device and the UPF network element, transfer the control message sent to the terminal device, and transfer the control message sent to the access network device. Radio resource control information of network access devices, etc.
  • N15 the interface between the PCF network element and the AMF network element, which can be used to issue terminal equipment policies and access control related policies.
  • N35 the interface between the UDM network element and the UDR network element, which can be used for the UDM network element to obtain user subscription data information from the UDR network element.
  • N36 the interface between the PCF network element and the UDR network element, which can be used for the PCF network element to obtain policy-related subscription data and application data-related information from the UDR network element.
  • the above-mentioned network element or function can be a network element in a hardware device, or a software function running on dedicated hardware, or a virtualization function instantiated on a platform (for example, a cloud platform).
  • a platform for example, a cloud platform.
  • the foregoing network element or function may be implemented by one device, or jointly implemented by multiple devices, or may be a functional module in one device, which is not specifically limited in this embodiment of the present application.
  • FIG. 2 it is a method for guaranteeing a voice service provided by an embodiment of the present application.
  • the method includes the following steps:
  • the communication network element receives indication information, where the indication information is used to indicate that a target process is related to a voice service.
  • the voice service may be an IP multimedia subsystem (IP multimedia subsystem, IMS) voice service.
  • IP multimedia subsystem IP multimedia subsystem, IMS
  • IMS IP multimedia subsystem
  • the voice service in the embodiment of the present application may also be replaced by other services, such as video services, low-latency services, and so on.
  • Step 202 the communication network element prioritizes the target process according to the indication information.
  • the communication network element processes the target flow preferentially according to the indication information.
  • the communication network element can prioritize the target process related to the voice service according to the received instruction information, thereby ensuring the high priority processing of the voice service, helping to improve the communication quality of the voice service and user experience.
  • the above target process is an evolved packet system (evolved packet system, EPS) fallback (Fallback) handover process.
  • EPS evolved packet system
  • Fallback fallback
  • EPS fallback refers to the fact that in the initial stage of 5G deployment, new radio (NR) voice (voice of NR, VoNR) is immature, and operators mostly adopt the EPS fallback process to fall back from 5G to the fourth generation (4th generation, 4G) to achieve voice calls.
  • NR new radio
  • the AMF network element may receive a handover request message from an NR access network device (such as gNB, etc.), and the handover request message includes the above indication information.
  • an NR access network device such as gNB, etc.
  • the MME may receive a redirection request message from a 5G AMF network element, where the redirection request message includes the aforementioned indication information.
  • the 4G access network device can receive a handover request message from a 4G MME , the handover request message includes the above indication information.
  • the 5G access network device is a gNB
  • the 4G access network device is an eNB as an example for illustration.
  • FIG. 3 it is a method for guaranteeing a voice service provided by an embodiment of the present application. The method includes the following steps:
  • step 301 the SMF network element sends a request message to the gNB.
  • the gNB receives the request message.
  • the request message is used to request to create an IMS voice QoS flow.
  • step 302 the gNB decides to initiate EPS fallback.
  • the gNB decides to initiate EPS fallback according to the operator's configuration.
  • step 303 the gNB sends a reply message to the SMF network element.
  • the SMF receives the reply message.
  • the reply message is used to trigger the initiation of the EPS fallback procedure.
  • Step 304 the gNB sends a handover required (handover required) message to the AMF network element.
  • the AMF network element receives the handover requirement message.
  • the handover requirement message includes the above indication information, and the handover requirement message is used to request the target side to prepare handover resources.
  • the AMF network element saves the indication information, and handles the 5G to 4G EPS fallback handover process triggered by the voice service with high priority in scenarios such as congestion.
  • Step 305 the AMF network element sends a redirection request message to the MME.
  • the MME receives the redirection request message.
  • the redirection request message carries the above indication information.
  • the redirection request message is used to instruct the target side to prepare for handover.
  • the MME saves the indication information, and handles the 5G-to-4G EPS fallback handover process triggered by the voice service with high priority in scenarios such as congestion.
  • Step 306 the MME sends a handover request (handover request) message to the eNB.
  • the eNB receives the handover request message.
  • the handover request message carries the above indication information.
  • the handover request message is used to request the eNB to prepare handover resources.
  • the eNB saves the indication information, and handles the EPS fallback handover process from 5G to 4G triggered by the voice service with high priority in scenarios such as congestion.
  • Step 307 other steps of the EPS fallback handover procedure.
  • This step is optional.
  • the AMF network element, MME, and eNB receive the indication information indicating that the target process is related to the voice service, and can prioritize the EPS fallback handover process related to the voice service, and gNG It can also give priority to the EPS fallback process related to the voice service, so as to ensure the high-priority processing of the voice service, help to improve the communication quality of the voice service, and improve the user experience.
  • the above target process is the EPS fallback reselection process.
  • the AMF network element may receive a context request message from the MME, and the context request message includes the above indication information.
  • the 5G access network device is a gNB
  • the 4G access network device is an eNB as an example for illustration.
  • FIG. 4 it is a method for guaranteeing a voice service provided by an embodiment of the present application. The method includes the following steps:
  • Step 401 to step 403 are the same as above step 301 to step 303.
  • Step 404 the terminal device sends a tracking area update (tracking area updata, TAU) request message to the MME.
  • the MME receives the TAU request message.
  • the TAU request message includes a voice indication or other voice indication information, and the voice indication or other voice indication information is used to instruct to initiate a mobile original call.
  • the MME saves the voice indication, and processes the 5G to 4G EPS fallback reselection process triggered by the voice service with high priority in scenarios such as congestion.
  • step 405 the MME sends a context request message to the AMF network element.
  • the AMF network element receives the context request message.
  • the context request message carries the above indication information.
  • the context request message is used to request to obtain user information.
  • the indication information in the context request message may be the above voice indication, or may be generated according to the voice indication.
  • the AMF network element saves the indication information, and handles the 5G to 4G EPS fallback reselection process triggered by the voice service with high priority in scenarios such as congestion.
  • Step 406 other steps of the EPS fallback reselection process.
  • This step is optional.
  • the AMF network element receives the indication information indicating that the target process is related to the voice service, and can prioritize the EPS fallback reselection process related to the voice service, and the MME can also According to the voice instruction, the EPS fallback reselection process related to the voice service is prioritized, so as to ensure the high-priority processing of the voice service, which helps to improve the communication quality of the voice service and user experience.
  • the above target process is an N2 handover process.
  • the AMF network element may receive a handover requirement message from a source access network device (such as a source gNB), and the handover requirement message includes the above indication information.
  • a source access network device such as a source gNB
  • the target AMF network element may receive a context establishment message from a 5G source AMF network element, and the context establishment message includes the above indication information.
  • the N2 handover process will be described below in conjunction with FIG. 5( a ) and FIG. 5( b ).
  • the N2 handover in 5G is taken as an example for illustration.
  • the AMF network elements before and after the handover are the same AMF network element.
  • the method includes the following steps:
  • step 501a the SMF network element sends a request message to the source gNB.
  • the source gNB receives the request message.
  • the request message is used to request to create an IMS voice QoS flow.
  • Step 502a the source gNB decides to initiate VoNR.
  • the source gNB decides to initiate VoNR according to the operator's configuration.
  • Step 503a the source gNB sends a reply message to the SMF network element.
  • the SMF receives the reply message.
  • the reply message is used to trigger VoNR initiation.
  • Step 504a the source gNB sends a handover required message to the AMF network element.
  • the AMF network element receives the handover requirement message.
  • the handover requirement message includes the above indication information, and the handover requirement message is used to request the target side to prepare handover resources.
  • the AMF network element saves the indication information, and handles the N2 handover process triggered by the voice service with high priority in scenarios such as congestion.
  • step 505a the AMF network element sends a handover request (handover request) message to the target gNB.
  • the target gNB receives the handover request message.
  • the handover request message carries the above indication information.
  • the handover request message is used to request the target gNB to prepare handover resources.
  • the target gNB saves the indication information, and handles the N2 handover process triggered by the voice service with high priority in scenarios such as congestion.
  • step 506a N2 switches to other steps of the process.
  • This step is optional.
  • the AMF network element and the target gNB receive the indication information indicating that the target process is related to the voice service, and can prioritize the N2 handover process related to the voice service, and the source gNB can also Prioritize the N2 handover process related to the voice service, thereby ensuring high-priority processing of the voice service, helping to improve the communication quality of the voice service and user experience.
  • the AMF network elements before and after the handover are different AMF network elements.
  • the method includes the following steps:
  • Step 501b to step 503b are the same as above step 501a to step 503a.
  • Step 504b the source gNB sends a handover required message to the source AMF network element.
  • the source AMF network element receives the handover requirement message.
  • the handover requirement message includes the above indication information, and the handover requirement message is used to request the target side to prepare handover resources.
  • the source AMF network element saves the indication information, and handles the N2 handover process triggered by the voice service with high priority in scenarios such as congestion.
  • step 505b the source AMF network element sends a context establishment message to the target AMF network element.
  • the target AMF network element receives the context establishment message.
  • the context establishment message includes the above indication information, and the context establishment message is used to request creation of a user context in the target AMF.
  • the target AMF network element saves the indication information, and handles the N2 handover process triggered by the voice service with high priority in scenarios such as congestion.
  • Step 506b the target AMF network element sends a handover request (handover request) message to the target gNB.
  • the target gNB receives the handover request message.
  • the handover request message carries the above indication information.
  • the handover request message is used to request the target gNB to prepare handover resources.
  • the target gNB saves the indication information, and handles the N2 handover process triggered by the voice service with high priority in scenarios such as congestion.
  • step 507b N2 switches to other steps of the process.
  • This step is optional.
  • the source AMF network element, the target AMF network element and the target gNB receive the indication information indicating that the target process is related to the voice service, and can prioritize the N2 handover process related to the voice service , and the source gNB can also prioritize the N2 handover process related to the voice service, thereby ensuring the high priority processing of the voice service, helping to improve the communication quality of the voice service and user experience.
  • the above target process is an Xn switching process.
  • the AMF network element may receive a path switching message from the target access network device, and the path switching message includes the above indication information.
  • Xn switching process will be described below with reference to FIG. 6 .
  • Xn handover in 5G is taken as an example for illustration.
  • the AMF network elements before and after the handover are the same AMF network element.
  • the method includes the following steps:
  • Step 601 to step 603 are the same as above step 501a to step 503a.
  • Step 604 the target gNB sends a path switching message to the AMF network element.
  • the AMF network element receives the path switching message.
  • the path switch message includes the above indication information, and the path switch message is used to indicate the new serving gNB of the AMF.
  • the AMF network element saves the indication information, and handles the Xn handover process triggered by the voice service with high priority in scenarios such as congestion.
  • Step 605 Xn switches to other steps of the process.
  • This step is optional.
  • the AMF network element receives the indication information indicating that the target process is related to the voice service, and can prioritize the Xn handover process related to the voice service, and the target gNB can also prioritize the process related to the voice service.
  • the Xn switching process related to the voice service ensures the high-priority processing of the voice service, helps to improve the communication quality of the voice service, and improves the user experience.
  • the communication network element includes corresponding hardware structures and/or software modules for performing various functions.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • FIG. 7 and FIG. 8 are schematic structural diagrams of a possible communication device provided by an embodiment of the present application. These communication devices can be used to implement the functions of the communication network elements in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be a communication network element, or may be a module (such as a chip) applied to a communication network element.
  • a communication device 700 includes a processing unit 710 and a transceiver unit 720 .
  • the communication device 700 is configured to implement the functions of the communication network element in the foregoing method embodiments.
  • the transceiving unit 720 is configured to receive indication information, the indication information is used to indicate that the target process is related to the voice service; the processing unit 710 is configured to preferentially process the target process according to the indication information.
  • the processing unit 710 is specifically configured to preferentially process the target process according to the indication information when the network is congested.
  • the target process is an Evolved Packet System EPS fallback handover process.
  • the communication device is an access and mobility management functional network element; the transceiver unit 720 is specifically configured to receive a handover request message from an access network device of the new wireless NR, and the handover The demand message includes the indication information.
  • the communication device is a mobility management entity; the transceiver unit 720 is specifically configured to receive a redirection request message from an access and mobility management functional network element, and the redirection request message Include the instruction information.
  • the communication device is an access network device of Long Term Evolution LTE; the transceiver unit 720 is specifically configured to receive a handover request message from a mobility management entity, and the handover request message includes the Instructions.
  • the target process is an EPS fallback reselection process.
  • the communication device is an access and mobility management function network element; the transceiver unit 720 is specifically configured to receive a context request message from a mobility management entity, and the context request message includes the instructions described above.
  • the target process is an N2 handover process.
  • the communication device is a network element with an access and mobility management function; the transceiver unit 720 is specifically configured to receive a handover request message from a source access network device, and the handover request message includes the instructions.
  • the communication device is a network element with a target access and mobility management function; the transceiver unit 720 is specifically configured to receive a context establishment message from a network element with a source access and mobility management function,
  • the context establishment message includes the indication information.
  • the target process is an Xn switching process.
  • the communication device is an access and mobility management functional network element; the transceiver unit 720 is specifically configured to receive a path switching message from a target access network device, and the path switching message includes the instructions.
  • processing unit 710 and the transceiver unit 720 can be directly obtained by referring to related descriptions in the above method embodiments, and details are not repeated here.
  • the communication device 800 includes a processor 810 and an interface circuit 820 .
  • the processor 810 and the interface circuit 820 are coupled to each other.
  • the interface circuit 820 may be a transceiver or an input/output interface.
  • the communication device 800 may further include a memory 830 for storing instructions executed by the processor 810 or storing input data required by the processor 810 to execute the instructions or storing data generated after the processor 810 executes the instructions.
  • the processor 810 is used to implement the functions of the processing unit 710
  • the interface circuit 820 is used to implement the functions of the transceiver unit 720 .
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general processors, digital signal processors (digital signal processor, DSP), application specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor can be a microprocessor, or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented by means of hardware, or may be implemented by means of a processor executing software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory, flash memory, read-only memory, programmable read-only memory, erasable programmable read-only memory, electrically erasable programmable read-only Memory, registers, hard disk, removable hard disk, CD-ROM or any other form of storage medium known in the art.
  • An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium.
  • the storage medium may also be a component of the processor.
  • the processor and storage medium can be located in the ASIC.
  • the ASIC may be located in an access network device or a terminal.
  • the processor and the storage medium may also exist in the access network device or the terminal as discrete components.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product comprises one or more computer programs or instructions. When the computer program or instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are executed in whole or in part.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, an access network device, a user device or other programmable devices.
  • the computer program or instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer program or instructions may be downloaded from a website, computer, A server or data center transmits to another website site, computer, server or data center by wired or wireless means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrating one or more available media.
  • the available medium may be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it may also be an optical medium, such as a digital video disk; and it may also be a semiconductor medium, such as a solid state disk.
  • the computer readable storage medium may be a volatile or a nonvolatile storage medium, or may include both volatile and nonvolatile types of storage media.
  • “at least one” means one or more, and “multiple” means two or more.
  • “And/or” describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and B exists alone, where A, B can be singular or plural.
  • the character “/” generally indicates that the contextual objects are an “or” relationship; in the formulas of this application, the character “/” indicates that the contextual objects are a "division” Relationship.

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Abstract

本申请提供一种保障语音业务的方法及通信装置。该方法包括：通信网元接收指示信息，该指示信息用于指示目标流程与语音业务相关；该通信网元根据该指示信息，优先处理该目标流程。该方案，通信网元可以根据收到的指示信息，优先处理与语音业务相关的目标流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。

Description

一种保障语音业务的方法及通信装置
相关申请的交叉引用
本申请要求在2021年10月25日提交中国专利局、申请号为202111240146.X、申请名称为“一种保障语音业务的方法及通信装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信技术领域，尤其涉及一种保障语音业务的方法及通信装置。
背景技术
语音业务是运营商在原有语音基本呼叫的基础上实现各种新增的功能，包括但不限于：呼叫等待，呼叫保持，呼叫前传，呼叫转接，群线组接入，呼入限制，呼出限制，呼叫备份，呼叫等待提示。
随着互联网技术的发展，语音业务的应用越来越广泛，如何保障语音业务的通信质量，有待解决。
发明内容
本申请实施例提供一种保障语音业务的方法及通信装置，用以保障语音业务的通信质量。
第一方面，本申请实施例提供一种保障语音业务的方法，该方法可以由通信网元或应用于通信网元中的模块(如芯片)来执行。该方法包括：通信网元接收指示信息，该指示信息用于指示目标流程与语音业务相关；该通信网元根据该指示信息，优先处理该目标流程。
根据上述方案，通信网元可以根据收到的指示信息，优先处理与语音业务相关的目标流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
作为一种可能的实现方法，在网络拥塞的情况下，该通信网元根据该指示信息，优先处理该目标流程。
作为一种可能的实现方法，该目标流程是演进分组***EPS回落切换流程。
作为一种可能的实现方法，该通信网元是接入与移动性管理功能网元；该接入与移动性管理功能网元接收来自新无线NR的接入网设备的切换需求消息，该切换需求消息包括该指示信息。
作为一种可能的实现方法，该通信网元是移动性管理实体；该移动性管理实体接收来自接入与移动性管理功能网元的重定向请求消息，该重定向请求消息包括该指示信息。
作为一种可能的实现方法，该通信网元是长期演进LTE的接入网设备；该接入网设备接收来自移动性管理实体的切换请求消息，该切换请求消息包括该指示信息。
根据上述方案，可以实现在EPS回落切换流程中，接入与移动性管理功能网元、移动性管理实体以及LTE的接入网设备收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的EPS回落切换流程，并且NR的接入网设备也可以优先处理与语音业务相关的EPS回落切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
作为一种可能的实现方法，该目标流程是EPS回落重选流程。
作为一种可能的实现方法，该通信网元是接入与移动性管理功能网元；该接入与移动性管理功能网元接收来自移动性管理实体的上下文请求消息，该上下文请求消息包括该指示信息。
根据上述方案，可以实现在EPS回落重选流程中，接入与移动性管理功能网元收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的EPS回落重选流程，并且移动性管理实体也可以根据语音指示优先处理与语音业务相关的EPS回落重选流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
作为一种可能的实现方法，该目标流程是N2切换流程。
作为一种可能的实现方法，该通信网元是接入与移动性管理功能网元；该接入与移动性管理功能网元接收来自源接入网设备的切换需求消息，该切换需求消息包括该指示信息。
作为一种可能的实现方法，该目标接入与移动性管理功能网元接收来自源接入与移动性管理功能网元的上下文建立消息，该上下文建立消息包括该指示信息。
根据上述方案，可以实现在N2切换流程中，接入与移动性管理功能网元和目标接入网设备收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的N2切换流程，并且源接入网设备也可以优先处理与语音业务相关的N2切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
作为一种可能的实现方法，该目标流程是Xn切换流程。
作为一种可能的实现方法，该通信网元是接入与移动性管理功能网元；该接入与移动性管理功能网元接收来自目标接入网设备的路径切换消息，该路径切换消息包括该指示信息。
根据上述方案，可以实现在Xn切换流程中，接入与移动性管理功能网元收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的Xn切换流程，并且目标接入网设备也可以优先处理与语音业务相关的Xn切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
第二方面，本申请实施例提供一种通信装置，该装置可以是会话管理网元或应用于会话管理网元中的模块(如芯片)。该装置具有实现上述第一方面的任意实现方法的功能。该功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。该硬件或软件包括一个或多个与上述功能相对应的模块。
第三方面，本申请实施例提供一种通信装置，包括处理器和存储器；该存储器用于存储计算机指令，当该装置运行时，该处理器执行该存储器存储的计算机指令，以使该装置执行上述第一方面中的任意实现方法。
第四方面，本申请实施例提供一种通信装置，包括用于执行上述第一方面中的任意实现方法的各个步骤的单元或手段(means)。
第五方面，本申请实施例提供一种通信装置，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，并执行上述第一方面中的任意实现方法。该处理器包括一个或多个。
第六方面，本申请实施例提供一种通信装置，包括与存储器耦合的处理器，该处理器用于调用所述存储器中存储的程序，以执行上述第一方面中的任意实现方法。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。
第七方面，本申请实施例还提供一种计算机可读存储介质，所述计算机可读存储介质中存储有指令，当其在通信装置上运行时，使得上述第一方面中的任意实现方法被执行。
第八方面，本申请实施例还提供一种计算机程序产品，该计算机程序产品包括计算机程序或指令，当计算机程序或指令被通信装置运行时，使得上述第一方面中的任意实现方法被执行。
第九方面，本申请实施例还提供一种芯片***，包括：处理器，用于执行上述第一方面中的任意实现方法。
附图说明
图1(a)为基于服务化架构的5G网络架构示意图；
图1(b)为基于点对点接口的5G网络架构示意图；
图2为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图3为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图4为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图5(a)为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图5(b)为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图6为本申请实施例提供的一种保障语音业务的方法的流程示意图；
图7为本申请实施例提供的一种通信装置示意图；
图8为本申请实施例提供的一种通信装置示意图。
具体实施方式
图1(a)为基于服务化架构的第五代(5th generation，5G)网络架构示意图。图1(a)所示的5G网络架构中可包括终端设备、接入网设备以及核心网设备。终端设备通过接入网设备和核心网设备接入数据网络(data network，DN)。其中，核心网设备包括以下网元中的部分或者全部：统一数据管理(unified data management，UDM)网元、统一数据库(unified data repository，UDR)网元、网络开放功能(network exposure function，NEF)网元(图中未示出)、应用功能(application function，AF)网元、策略控制功能(policy control function，PCF)网元、接入与移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、用户面功能(user plane function，UPF)网元、网络存储功能(network repository function，NRF)网元(图中未示出)。
接入网设备可以是无线接入网(radio access network，RAN)设备。例如：基站(base station)、演进型基站(evolved NodeB，eNodeB)、发送接收点(transmission reception point，TRP)、5G移动通信***中的下一代基站(next generation NodeB，gNB)、第六代(the 6th  generation，6G)移动通信***中的下一代基站、未来移动通信***中的基站或无线保真(wireless fidelity，WiFi)***中的接入节点等；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)。无线接入网设备可以是宏基站，也可以是微基站或室内站，还可以是中继节点或施主节点等。本申请的实施例对无线接入网设备所采用的具体技术和具体设备形态不做限定。
终端设备可以是用户设备(user equipment，UE)、移动台、移动终端等。终端设备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。终端设备可以是手机、平板电脑、带无线收发功能的电脑、可穿戴设备、车辆、城市空中交通工具(如无人驾驶机、直升机等)、轮船、机器人、机械臂、智能家居设备等。
接入网设备和终端设备可以是固定位置的，也可以是可移动的。接入网设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和人造卫星上。本申请的实施例对接入网设备和终端设备的应用场景不做限定。
AMF网元，包含执行移动性管理、接入鉴权/授权等功能。此外，还负责在终端设备与PCF间传递用户策略。
SMF网元，包含执行会话管理、PCF下发控制策略的执行、UPF的选择、终端设备的互联网协议(internet protocol，IP)地址分配等功能。
UPF网元，作为和数据网络的接口，包含完成用户面数据转发、基于会话/流级的计费统计，带宽限制等功能。
UDM网元，包含执行管理签约数据、用户接入授权等功能。
UDR网元，包含执行签约数据、策略数据、应用数据等类型数据的存取功能。
NEF网元，用于支持能力和事件的开放。
AF网元，传递应用侧对网络侧的需求，例如，QoS需求或用户状态事件订阅等。AF可以是第三方功能实体，也可以是运营商部署的应用服务器。
PCF网元，包含负责针对会话、业务流级别进行计费、QoS带宽保障及移动性管理、终端设备策略决策等策略控制功能。
NRF网元，可用于提供网元发现功能，基于其他网元的请求，提供网元类型对应的网元信息。NRF网元还提供网元管理服务，如网元注册、更新、去注册以及网元状态订阅和推送等。
DN，是位于运营商网络之外的网络，运营商网络可以接入多个DN，DN上可部署多种业务，可为终端设备提供数据和/或语音等服务。例如，DN是某智能工厂的私有网络，智能工厂安装在车间的传感器可为终端设备，DN中部署了传感器的控制服务器，控制服务器可为传感器提供服务。传感器可与控制服务器通信，获取控制服务器的指令，根据指令将采集的传感器数据传送给控制服务器等。又例如，DN是某公司的内部办公网络，该公司员工的手机或者电脑可为终端设备，员工的手机或者电脑可以访问公司内部办公网络上的信息、数据资源等。
图1(a)中Nudr、Npcf、Namf、Nudm、Nsmf、Naf分别为上述UDR、PCF、AMF、UDM、 SMF、AF提供的服务化接口，用于调用相应的服务化操作。N1、N2、N3、N4以及N6为接口序列号，这些接口序列号的含义如下：
1)、N1：AMF网元与终端设备之间的接口，可以用于向终端设备传递非接入层(non access stratum，NAS)信令(如包括来自AMF网元的QoS规则)等。
2)、N2：AMF网元与接入网设备之间的接口，可以用于传递核心网侧至接入网设备的无线承载控制信息等。
3)、N3：接入网设备与UPF网元之间的接口，主要用于传递接入网设备与UPF网元间的上下行用户面数据。
4)、N4：SMF网元与UPF网元之间的接口，可以用于控制面与用户面之间传递信息，包括控制面向用户面的转发规则、QoS规则、流量统计规则等的下发以及用户面的信息上报。
5)、N6：UPF网元与DN的接口，用于传递UP网元F与DN之间的上下行用户数据流。
图1(b)为基于点对点接口的5G网络架构示意图，其中的网元的功能的介绍可以参考图1(a)中对应的网元的功能的介绍，不再赘述。图1(b)与图1(a)的主要区别在于：图1(a)中的各个控制面网元之间的接口是服务化的接口，图1(b)中的各个控制面网元之间的接口是点对点的接口。
在图1(b)所示的架构中，核心网的各个网元之间的接口名称及功能如下：
1)、N5：AF网元与PCF网元之间的接口，可以用于应用业务请求下发以及网络事件上报。
2)、N7：PCF网元与SMF网元之间的接口，可以用于下发协议数据单元(protocol data unit，PDU)会话粒度以及业务数据流粒度控制策略。
3)、N8：AMF网元与UDM网元间的接口，可以用于AMF网元向UDM网元获取接入与移动性管理相关签约数据与鉴权数据，以及AMF网元向UDM网元注册终端设备当前移动性管理相关信息等。
4)、N9：UPF网元和UPF网元之间的用户面接口，用于传递UPF网元间的上下行用户数据流。
5)、N10：SMF网元与UDM网元间的接口，可以用于SMF网元向UDM网元获取会话管理相关签约数据，以及SMF网元向UDM网元注册终端设备当前会话相关信息等。
6)、N11：SMF网元与AMF网元之间的接口，可以用于传递接入网设备和UPF网元之间的PDU会话隧道信息、传递发送给终端设备的控制消息、传递发送给接入网设备的无线资源控制信息等。
7)、N15：PCF网元与AMF网元之间的接口，可以用于下发终端设备策略及接入控制相关策略。
8)、N35：UDM网元与UDR网元间的接口，可以用于UDM网元从UDR网元中获取用户签约数据信息。
9)、N36：PCF网元与UDR网元间的接口，可以用于PCF网元从UDR网元中获取策略相关签约数据以及应用数据相关信息。
可以理解的是，上述网元或者功能既可以是硬件设备中的网络元件，也可以是在专用 硬件上运行软件功能，或者是平台(例如，云平台)上实例化的虚拟化功能。作为一种可能的实现方法，上述网元或者功能可以由一个设备实现，也可以由多个设备共同实现，还可以是一个设备内的一个功能模块，本申请实施例对此不作具体限定。
参考图2，为本申请实施例提供的一种保障语音业务的方法。该方法包括以下步骤：
步骤201，通信网元接收指示信息，该指示信息用于指示目标流程与语音业务相关。
示例性的，该语音业务可以是IP多媒体子***(IP multimedia subsystem，IMS)语音业务。
作为一种实现方法，本申请实施例的语音业务也可以替换为其它业务，如视频业务、低时延业务，等等。
步骤202，通信网元根据指示信息，优先处理目标流程。
作为一种实现方法，在网络拥塞或通信网元负载较重的情况下，通信网元根据指示信息，优先处理目标流程。
根据上述方案，通信网元可以根据收到的指示信息，优先处理与语音业务相关的目标流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
下面结合具体应用场景，对上述方案进行说明。
应用场景一，上述目标流程是演进分组***(evolved packet system，EPS)回落(Fallback)切换流程。
EPS回落指的是在5G部署初期，新无线(new radio，NR)语音(voice of NR，VoNR)并不成熟，运营商多采用通过EPS回落流程，从5G回落到***(4th generation，4G)实现语音通话的方式。
当上述通信网元是5G的AMF网元，则AMF网元可以接收来自NR的接入网设备(如gNB等)的切换需求消息，该切换需求消息包括上述指示信息。
当上述通信网元是4G的MME，则MME可以接收来自5G的AMF网元的重定向请求消息，该重定向请求消息包括上述指示信息。
当上述通信网元是4G的接入网设备或长期演进(long term evolution，LTE)的接入网设备(如eNB等)，则4G的接入网设备可以接收来自4G的MME的切换请求消息，该切换请求消息包括上述指示信息。
下面结合图3对EPS回落切换流程进行说明。该示例中，以5G的接入网设备是gNB，4G的接入网设备是eNB为例进行说明。参考图3，为本申请实施例提供的一种保障语音业务的方法。该方法包括以下步骤：
步骤301，SMF网元向gNB发送请求消息。相应的，gNB接收该请求消息。
该请求消息用于请求创建IMS语音的QoS流。
步骤302，gNB决策发起EPS回落。
比如，gNB根据运营商配置，决策发起EPS回落。
步骤303，gNB向SMF网元发送回复消息。相应的，SMF接收回复消息。
该回复消息用于触发发起EPS回落流程。
步骤304，gNB向AMF网元发送切换需求(handover required)消息。相应的，AMF 网元接收该切换需求消息。
该切换需求消息包括上述指示信息，该切换需求消息用于请求目标侧准备切换资源。
AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的5G到4G的EPS回落切换流程。
步骤305，AMF网元向MME发送重定向请求消息。相应的，MME接收该重定向请求消息。
该重定向请求消息携带上述指示信息。该重定向请求消息用于指示目标侧进行切换准备。
MME保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的5G到4G的EPS回落切换流程。
步骤306，MME向eNB发送切换请求(handover request)消息。相应的，eNB接收该切换请求消息。
该切换请求消息携带上述指示信息。该切换请求消息用于请求eNB准备切换资源。
eNB保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的5G到4G的EPS回落切换流程。
步骤307，EPS回落切换流程的其它步骤。
该步骤可选。
根据上述方案，可以实现在EPS回落切换流程中，AMF网元、MME以及eNB收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的EPS回落切换流程，并且gNG也可以优先处理与语音业务相关的EPS回落切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
应用场景二，上述目标流程是EPS回落重选流程。
当上述通信网元是5G的AMF网元，则AMF网元可以接收来自MME的上下文请求消息，该上下文请求消息包括上述指示信息。
下面结合图4对EPS回落重选流程进行说明。该示例中，以5G的接入网设备是gNB，4G的接入网设备是eNB为例进行说明。参考图4，为本申请实施例提供的一种保障语音业务的方法。该方法包括以下步骤：
步骤401至步骤403，同上述步骤301至步骤303。
步骤404，终端设备向MME发送跟踪区域更新(tracking areaupdata，TAU)请求消息。相应的，MME接收该TAU请求消息。
该TAU请求消息包括语音指示或其他语音指示信息，该语音指示或其他语音指示信息用于指示发起主叫语音(mobile original call)。
MME保存该语音指示，并在拥塞等场景下，高优先级处理语音业务触发的5G到4G的EPS回落重选流程。
步骤405，MME向AMF网元发送上下文请求消息。相应的，AMF网元接收该上下文请求消息。
该上下文请求消息携带上述指示信息。该上下文请求消息用于请求获取用户信息。
该上下文请求消息中的指示信息可以是上述语音指示，也可以是根据语音指示生成的。
AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的5G到 4G的EPS回落重选流程。
步骤406，EPS回落重选流程的其它步骤。
该步骤可选。
根据上述方案，可以实现在EPS回落重选流程中，AMF网元收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的EPS回落重选流程，并且MME也可以根据语音指示优先处理与语音业务相关的EPS回落重选流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
应用场景三，上述目标流程是N2切换流程。
当上述通信网元是5G的AMF网元，则AMF网元可以接收来自源接入网设备(如源gNB)的切换需求消息，该切换需求消息包括上述指示信息。
当上述通信网元是5G的目标AMF网元，则目标AMF网元可以接收来自5G的源AMF网元的上下文建立消息，该上下文建立消息包括上述指示信息。
下面结合图5(a)和图5(b)对N2切换流程进行说明。该示例中，以5G中的N2切换为例进行说明。
参考图5(a)，为本申请实施例提供的一种保障语音业务的方法。该方法中，切换前后的AMF网元是同一个AMF网元。该方法包括以下步骤：
步骤501a，SMF网元向源gNB发送请求消息。相应的，源gNB接收该请求消息。
该请求消息用于请求创建IMS语音的QoS流。
步骤502a，源gNB决策发起VoNR。
比如，源gNB根据运营商配置，决策发起VoNR。
步骤503a，源gNB向SMF网元发送回复消息。相应的，SMF接收回复消息。
该回复消息用于触发发起VoNR。
步骤504a，源gNB向AMF网元发送切换需求(handover required)消息。相应的，AMF网元接收该切换需求消息。
该切换需求消息包括上述指示信息，该切换需求消息用于请求目标侧准备切换资源。
AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的N2切换流程。
步骤505a，AMF网元向目标gNB发送切换请求(handover request)消息。相应的，目标gNB接收该切换请求消息。
该切换请求消息携带上述指示信息。该切换请求消息用于请求目标gNB准备切换资源。
目标gNB保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的N2切换流程。
步骤506a，N2切换流程的其它步骤。
该步骤可选。
根据上述方案，可以实现在N2切换流程中，AMF网元和目标gNB收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的N2切换流程，并且源gNB也可以优先处理与语音业务相关的N2切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
参考图5(b)，为本申请实施例提供的一种保障语音业务的方法。该方法中，切换前后的AMF网元是不同的AMF网元。该方法包括以下步骤：
步骤501b至步骤503b，同上述步骤501a至步骤503a。
步骤504b，源gNB向源AMF网元发送切换需求(handover required)消息。相应的，源AMF网元接收该切换需求消息。
该切换需求消息包括上述指示信息，该切换需求消息用于请求目标侧准备切换资源。
源AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的N2切换流程。
步骤505b，源AMF网元向目标AMF网元发送上下文建立消息。相应的，目标AMF网元接收该上下文建立消息。
该上下文建立消息包括上述指示信息，该上下文建立消息用于请求在目标AMF创建用户上下文。
目标AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的N2切换流程。
步骤506b，目标AMF网元向目标gNB发送切换请求(handover request)消息。相应的，目标gNB接收该切换请求消息。
该切换请求消息携带上述指示信息。该切换请求消息用于请求目标gNB准备切换资源。
目标gNB保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的N2切换流程。
步骤507b，N2切换流程的其它步骤。
该步骤可选。
根据上述方案，可以实现在N2切换流程中，源AMF网元、目标AMF网元和目标gNB收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的N2切换流程，并且源gNB也可以优先处理与语音业务相关的N2切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
应用场景四，上述目标流程是Xn切换流程。
当上述通信网元是5G的AMF网元，则AMF网元可以接收来自目标接入网设备的路径切换消息，该路径切换消息包括上述指示信息。
下面结合图6对Xn切换流程进行说明。该示例中，以5G中的Xn切换为例进行说明。
参考图6，为本申请实施例提供的一种保障语音业务的方法。该方法中，切换前后的AMF网元是同一个AMF网元。该方法包括以下步骤：
步骤601至步骤603，同上述步骤501a至步骤503a。
步骤604，目标gNB向AMF网元发送路径切换消息。相应的，AMF网元接收该路径切换消息。
该路径切换消息包括上述指示信息，该路径切换消息用于指示AMF新的服务gNB。
AMF网元保存该指示信息，并在拥塞等场景下，高优先级处理语音业务触发的Xn切换流程。
步骤605，Xn切换流程的其它步骤。
该步骤可选。
根据上述方案，可以实现在Xn切换流程中，AMF网元收到用于指示目标流程与语音业务相关的指示信息，可以优先处理与语音业务相关的Xn切换流程，并且目标gNB也可以优先处理与语音业务相关的Xn切换流程，从而保障语音业务的高优先级处理，有助于提升语音业务的通信质量，提升用户体验。
可以理解的是，为了实现上述实施例中功能，通信网元包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
图7和图8为本申请的实施例提供的可能的通信装置的结构示意图。这些通信装置可以用于实现上述方法实施例中通信网元的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请的实施例中，该通信装置可以是通信网元，也可以是应用于通信网元的模块(如芯片)。
如图7所示，通信装置700包括处理单元710和收发单元720。通信装置700用于实现上述方法实施例中通信网元的功能。
收发单元720，用于接收指示信息，所述指示信息用于指示目标流程与语音业务相关；处理单元710，用于根据所述指示信息，优先处理所述目标流程。
作为一种可能的实现方法，所述处理单元710，具体用于在网络拥塞的情况下，根据所述指示信息，优先处理所述目标流程。
作为一种可能的实现方法，所述目标流程是演进分组***EPS回落切换流程。
作为一种可能的实现方法，所述通信装置是接入与移动性管理功能网元；所述收发单元720，具体用于接收来自新无线NR的接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
作为一种可能的实现方法，所述通信装置是移动性管理实体；所述收发单元720，具体用于接收来自接入与移动性管理功能网元的重定向请求消息，所述重定向请求消息包括所述指示信息。
作为一种可能的实现方法，所述通信装置是长期演进LTE的接入网设备；所述收发单元720，具体用于接收来自移动性管理实体的切换请求消息，所述切换请求消息包括所述指示信息。
作为一种可能的实现方法，所述目标流程是EPS回落重选流程。
作为一种可能的实现方法，所述通信装置是接入与移动性管理功能网元；所述收发单元720，具体用于接收来自移动性管理实体的上下文请求消息，所述上下文请求消息包括所述指示信息。
作为一种可能的实现方法，所述目标流程是N2切换流程。
作为一种可能的实现方法，所述通信装置是接入与移动性管理功能网元；所述收发单元720，具体用于接收来自源接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
作为一种可能的实现方法，所述通信装置是目标接入与移动性管理功能网元；所述收发单元720，具体用于接收来自源接入与移动性管理功能网元的上下文建立消息，所述上 下文建立消息包括所述指示信息。
作为一种可能的实现方法，所述目标流程是Xn切换流程。
作为一种可能的实现方法，所述通信装置是接入与移动性管理功能网元；所述收发单元720，具体用于接收来自目标接入网设备的路径切换消息，所述路径切换消息包括所述指示信息。
有关上述处理单元710和收发单元720更详细的描述可以直接参考上述方法实施例中相关描述直接得到，这里不加赘述。
如图8所示，通信装置800包括处理器810和接口电路820。处理器810和接口电路820之间相互耦合。可以理解的是，接口电路820可以为收发器或输入输出接口。可选的，通信装置800还可以包括存储器830，用于存储处理器810执行的指令或存储处理器810运行指令所需要的输入数据或存储处理器810运行指令后产生的数据。
当通信装置800用于实现上述方法实施例时，处理器810用于实现上述处理单元710的功能，接口电路820用于实现上述收发单元720的功能。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器、闪存、只读存储器、可编程只读存储器、可擦除可编程只读存储器、电可擦除可编程只读存储器、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于接入网设备或终端中。当然，处理器和存储介质也可以作为分立组件存在于接入网设备或终端中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、接入网设备、用户设备或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机程序或指令可以从一个网站站点、计算机、服务器或数据中心通过有线或无线方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多个可用介质的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，数字视频光盘；还可以是半导体介质，例如，固态硬盘。该计算机可读存储介质可以是易失性或非易失性存储介质，或可包括易失性和非易失性两种类型的存储介质。
在本申请的各个实施例中，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。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，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的情况，其中A，B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系；在本申请的公式中，字符“/”，表示前后关联对象是一种“相除”的关系。
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (30)

  1. 一种保障语音业务的方法，其特征在于，包括：
    通信网元接收指示信息，所述指示信息用于指示目标流程与语音业务相关；
    所述通信网元根据所述指示信息，优先处理所述目标流程。
  2. 如权利要求1所述的方法，其特征在于，所述通信网元根据所述指示信息，优先处理所述目标流程，包括：
    在网络拥塞的情况下，所述通信网元根据所述指示信息，优先处理所述目标流程。
  3. 如权利要求1或2所述的方法，其特征在于，所述目标流程是演进分组***EPS回落切换流程。
  4. 如权利要求3所述的方法，其特征在于，所述通信网元是接入与移动性管理功能网元；
    所述通信网元接收指示信息，包括：
    所述接入与移动性管理功能网元接收来自新无线NR的接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
  5. 如权利要求3所述的方法，其特征在于，所述通信网元是移动性管理实体；
    所述通信网元接收指示信息，包括：
    所述移动性管理实体接收来自接入与移动性管理功能网元的重定向请求消息，所述重定向请求消息包括所述指示信息。
  6. 如权利要求3所述的方法，其特征在于，所述通信网元是长期演进LTE的接入网设备；
    所述通信网元接收指示信息，包括：
    所述接入网设备接收来自移动性管理实体的切换请求消息，所述切换请求消息包括所述指示信息。
  7. 如权利要求1或2所述的方法，其特征在于，所述目标流程是EPS回落重选流程。
  8. 如权利要求7所述的方法，其特征在于，所述通信网元是接入与移动性管理功能网元；
    所述通信网元接收指示信息，包括：
    所述接入与移动性管理功能网元接收来自移动性管理实体的上下文请求消息，所述上下文请求消息包括所述指示信息。
  9. 如权利要求1或2所述的方法，其特征在于，所述目标流程是N2切换流程。
  10. 如权利要求9所述的方法，其特征在于，所述通信网元是接入与移动性管理功能网元；
    所述通信网元接收指示信息，包括：
    所述接入与移动性管理功能网元接收来自源接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
  11. 如权利要求9所述的方法，其特征在于，所述通信网元是目标接入与移动性管理功能网元；
    所述通信网元接收指示信息，包括：
    所述目标接入与移动性管理功能网元接收来自源接入与移动性管理功能网元的上下 文建立消息，所述上下文建立消息包括所述指示信息。
  12. 如权利要求1或2所述的方法，其特征在于，所述目标流程是Xn切换流程。
  13. 如权利要求12所述的方法，其特征在于，所述通信网元是接入与移动性管理功能网元；
    所述通信网元接收指示信息，包括：
    所述接入与移动性管理功能网元接收来自目标接入网设备的路径切换消息，所述路径切换消息包括所述指示信息。
  14. 一种通信装置，其特征在于，包括：
    收发单元，用于接收指示信息，所述指示信息用于指示目标流程与语音业务相关；
    处理单元，用于根据所述指示信息，优先处理所述目标流程。
  15. 如权利要求14所述的装置，其特征在于，所述处理单元，具体用于在网络拥塞的情况下，根据所述指示信息，优先处理所述目标流程。
  16. 如权利要求14或15所述的装置，其特征在于，所述目标流程是演进分组***EPS回落切换流程。
  17. 如权利要求16所述的装置，其特征在于，所述通信装置是接入与移动性管理功能网元；所述收发单元，具体用于接收来自新无线NR的接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
  18. 如权利要求16所述的装置，其特征在于，所述通信装置是移动性管理实体；所述收发单元，具体用于接收来自接入与移动性管理功能网元的重定向请求消息，所述重定向请求消息包括所述指示信息。
  19. 如权利要求16所述的装置，其特征在于，所述通信装置是长期演进LTE的接入网设备；所述收发单元，具体用于接收来自移动性管理实体的切换请求消息，所述切换请求消息包括所述指示信息。
  20. 如权利要求14或15所述的装置，其特征在于，所述目标流程是EPS回落重选流程。
  21. 如权利要求20所述的装置，其特征在于，所述通信装置是接入与移动性管理功能网元；所述收发单元，具体用于接收来自移动性管理实体的上下文请求消息，所述上下文请求消息包括所述指示信息。
  22. 如权利要求14或15所述的装置，其特征在于，所述目标流程是N2切换流程。
  23. 如权利要求22所述的装置，其特征在于，所述通信装置是接入与移动性管理功能网元；所述收发单元，具体用于接收来自源接入网设备的切换需求消息，所述切换需求消息包括所述指示信息。
  24. 如权利要求22所述的装置，其特征在于，所述通信装置是目标接入与移动性管理功能网元；所述收发单元，具体用于接收来自源接入与移动性管理功能网元的上下文建立消息，所述上下文建立消息包括所述指示信息。
  25. 如权利要求14或15所述的装置，其特征在于，所述目标流程是Xn切换流程。
  26. 如权利要求25所述的装置，其特征在于，所述通信装置是接入与移动性管理功能网元；所述收发单元，具体用于接收来自目标接入网设备的路径切换消息，所述路径切换消息包括所述指示信息。
  27. 一种通信装置，其特征在于，包括用于执行如权利要求1至13中任一项所述方法的模块。
  28. 一种通信装置，其特征在于，包括处理器和接口电路，所述接口电路用于接收来自所述通信装置之外的其它通信装置的信号并传输至所述处理器或将来自所述处理器的信号发送给所述通信装置之外的其它通信装置，所述处理器通过逻辑电路或执行代码指令用于实现如权利要求1至13中任一项所述的方法。
  29. 一种计算机程序产品，其特征在于，包括计算机程序，当所述计算机程序被通信装置执行时，实现如权利要求1至13中任一项所述的方法。
  30. 一种计算机可读存储介质，其特征在于，所述存储介质中存储有计算机程序或指令，当所述计算机程序或指令被通信装置执行时，实现如权利要求1至13中任一项所述的方法。
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