WO2023174321A1 - 语音业务的实现方法、装置及终端 - Google Patents

语音业务的实现方法、装置及终端 Download PDF

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Publication number
WO2023174321A1
WO2023174321A1 PCT/CN2023/081556 CN2023081556W WO2023174321A1 WO 2023174321 A1 WO2023174321 A1 WO 2023174321A1 CN 2023081556 W CN2023081556 W CN 2023081556W WO 2023174321 A1 WO2023174321 A1 WO 2023174321A1
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Prior art keywords
terminal
network
indication
nas
instruction
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PCT/CN2023/081556
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English (en)
French (fr)
Inventor
康艳超
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维沃移动通信有限公司
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Publication of WO2023174321A1 publication Critical patent/WO2023174321A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0011Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0022Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/14Reselecting a network or an air interface

Definitions

  • the present application belongs to the field of wireless communication technology, and specifically relates to a voice service implementation method, device and terminal.
  • 5G networks may not directly deploy 5G voice services, but use 4G VoLTE services to maximize the use of existing network resources; or, 5G networks generally have small high-frequency coverage, and a certain number of If the area does not have 5G New Radio (NR) network coverage, it will also need to rely on 4G LTE coverage to continue voice services; or, the 5G network capacity is limited, and when the 5G network load is high, operators also hope to be able to connect users' The transfer of 5G voice services to the 4G network is triggered and executed.
  • NR New Radio
  • Embodiments of the present application provide a voice service implementation method, device and terminal, which can solve the problem of how a terminal residing in the first network can quickly fall back to the second network to perform voice services.
  • a voice service implementation method including: after the first non-access stratum (NAS) of a terminal residing in the first network obtains a first target indication, The first access layer (Access Stratum, AS) sends a second target indication, where the second target indication includes one of the following: an indication to fall back to the second network, an indication to redirect to the second network, and the terminal
  • the first NAS corresponds to the first network
  • the first AS of the terminal triggers network reselection to the second network, wherein the first AS of the terminal corresponds to the first network
  • the terminal passes The second network performs voice services.
  • a device for implementing a voice service which is applied to a terminal.
  • the device includes: an acquisition module, configured to obtain a first target indication through a first NAS residing in a terminal on a first network, and then obtain the first target indication to the terminal.
  • the first access layer AS of the terminal sends a second target indication, where the second target indication includes one of the following: an indication to fall back to the second network, an indication to redirect to the second network, and the terminal's
  • the first NAS corresponds to the first network;
  • a trigger module is configured to trigger network reselection to the second network through the first AS of the terminal, wherein the first AS of the terminal corresponds to the first network .
  • a terminal in a third aspect, includes a processor and a memory.
  • the memory stores programs or instructions that can be run on the processor.
  • the program or instructions are executed by the processor, the following implementations are implemented: The steps of the method described in one aspect.
  • a fourth aspect provides a terminal, including a processor and a communication interface, wherein the processor is used to implement the steps of the method described in the first aspect, and the communication interface is used to communicate with an external device.
  • a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented.
  • a chip in a sixth aspect, includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method described in the first aspect. A step of.
  • a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the method described in the first aspect. Method steps.
  • the first NAS of the terminal residing in the first network sends an instruction to fall back to the second network or an instruction to redirect to the second network to the first AS of the terminal.
  • the first AS triggers network reselection to the second network according to the received instruction, and then the terminal performs voice services through the second network, so that the terminal residing in the first network can quickly fall back to the second network to perform voice services. service, and if the terminal is in an idle state, the terminal does not need to enter the connected state in the first network and then fall back to the second network, but directly performs network reselection, thereby shortening the delay of the voice service.
  • Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable
  • Figure 2 shows a schematic flow chart of a terminal initially registered in the 5G network falling back to the 4G network to implement voice services
  • Figure 3 shows a schematic flow chart of a voice service implementation method provided by an embodiment of the present application
  • Figure 4 shows a schematic flow chart of a method for implementing a calling voice service in an embodiment of the present application
  • Figure 5 shows a schematic flow chart of a method for implementing a called voice service provided by an embodiment of the present application
  • Figure 6 shows a schematic structural diagram of a voice service implementation device provided by an embodiment of the present application
  • Figure 7 shows a schematic structural diagram of a communication device provided by an embodiment of the present application.
  • Figure 8 shows a schematic diagram of the hardware structure of a terminal provided by an embodiment of the present application.
  • first, second, etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and “second” are distinguished objects It is usually one type, and the number of objects is not limited.
  • the first object can be one or multiple.
  • “and/or” in the description and claims indicates at least one of the connected objects, and the character “/" generally indicates that the related objects are in an "or” relationship.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable.
  • the wireless communication system includes a terminal 11 and a network side device 12.
  • the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), laptop computer (Laptop Computer), also known as notebook computer, personal digital assistant (Personal Digital Assistant, PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile Internet Device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robot, wearable device (Wearable Device), vehicle user equipment (VUE), pedestrian Terminal side (Pedestrian User Equipment, PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service machines, etc.
  • Tablet Personal Computer Tablet Personal Computer
  • laptop computer laptop computer
  • Netbook ultra-mobile personal computer
  • UMPC mobile Internet Device
  • Mobile Internet Device Mobile Internet Device
  • MID
  • the network side device 12 may include an access network device and/or a core network device, where the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), or a radio access network. function or radio access network unit.
  • the access network device 12 may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc.
  • WLAN Wireless Local Area Network
  • the base station may be called a Node B, an evolved Node B (eNB), an access point, Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node , Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of the present application This introduction only takes the base station in the NR system as an example, and does not limit the specific type of base station.
  • eNB evolved Node B
  • BTS Base Transceiver Station
  • BSS Basic Service Set
  • ESS Extended Service Set
  • TRP Transmitting Receiving Point
  • Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), user plane function (User Plane Function, UPF), policy control function Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Server Discovery Function (EASDF), Unified Data Management (UDM) ), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration (CNC), Network Repository Function (NRF), network opening function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc.
  • MME mobility management entities
  • AMF Access and Mobility Management Function
  • SMF session management functions
  • User Plane Function User Plane Function
  • PCF Policy and Charging Rules
  • Figure 2 shows a possible solution, which can enable the 5G terminal (User Equipment, UE) to quickly fall back to 4G and perform VoLTE when initiating the calling and called voice services.
  • the solution mainly includes the following steps:
  • the voice service establishment request signaling Multimedia Subsystem (IP Multimedia Subsystem, IMS) Session Initialization Protocol (SIP) signaling
  • IMS IP Multimedia Subsystem
  • SIP Session Initialization Protocol
  • QoS Quality of Service
  • 5G QoS Identifier, 5QI 1QoS flow (flow).
  • NF Network Function
  • NG RAN Next Generation Radio Access Network
  • NG RAN interacts with the core network and refuses to modify the Protocol Data Unit (Protocol Data Unit, PDU) session indication to execute the multimedia subsystem (IP Multimedia Subsystem, IMS) voice fallback process.
  • PDU Protocol Data Unit
  • IMS IP Multimedia Subsystem
  • S205 The UE switches or redirects to the 4G LTE cell. After the UE accesses the 4G LTE cell, if the N26 interface is deployed, S206a is executed. If the N26 interface is not deployed, S206b is executed.
  • TAU Tracking Area update
  • the UE performs attach (attach) and concurrently establishes a handover attach (handover attach) type packet data network (Packet Data Network, PDN) connection process.
  • attach attach
  • handover attach handover attach
  • the UE After the TAU process or the attach process ends, the UE re-establishes an IMS Packet Data Network (PDN) connection on the 4G network.
  • PDN Packet Data Network
  • QCI QoS class identifier
  • the UE For a UE that is originally in the idle state, if the caller initiates a 5G voice service, based on the above solution, the UE needs to first initiate a 5G service request (service request) process to enter the 5G connected state, and then trigger the above process steps; for a UE that is originally in the idle state, For example, if the UE is the called party of the voice service, based on the above mechanism, the 5G network needs to page the UE in the 5G cell first to make it enter the connected state, and then trigger the above process steps.
  • service request service request
  • Figure 3 shows a schematic flow chart of the transmission method in the embodiment of the present application.
  • the method 300 can to be executed by the terminal.
  • the method may be performed by software or hardware installed on the terminal.
  • the method may include the following steps.
  • the first NAS of the terminal residing in the first network sends a second target indication to the first AS of the terminal, where the second target indication includes one of the following: fall back to Instructions to the second network, instructions to redirect to the second network.
  • the terminal residing in the first network may be in an idle state or a connected state, which is not specifically limited in this embodiment of the present application.
  • the first network and the second network adopt different wireless access technologies.
  • the first network includes but is not limited to a 5G network
  • the second network includes but is not limited to an Evolved Packet System (EPS) network, which may also be called a 4G network or an LTE network.
  • EPS Evolved Packet System
  • the first NAS of the terminal is the NAS corresponding to the first network in the terminal.
  • the 5G NAS of the terminal that is, the UE 5G NAS
  • 5GMM 5G Mobility Management
  • the first AS of the terminal is the AS corresponding to the first network in the terminal, for example, the 5G AS of the terminal, that is, the UE 5G AS.
  • the first NAS of the terminal obtains the first target indication.
  • the first NAS of the terminal obtains the first indication from the upper layer of the terminal.
  • the first indication includes but is not limited to the following: one:
  • Multimedia telephone service Multimedia telephone, MMTel
  • voice call instructions Multimedia telephone service (Multimedia telephone, MMTel) voice call instructions
  • IP Uplink Internet Protocol
  • IP-based short message Short Message Service over IP, SMSoIP
  • the first NAS determines to fall back to the second network, and sends the second target indication to the first AS, so that the first AS triggers The network is reselected to the second network.
  • the upper layer sends the first indication to the first NAS.
  • the first NAS sends the second target indication to the first AS.
  • the first NAS acquiring the first target indication may also be the first NAS of the terminal acquiring the first message from the first network.
  • the first message may be a paging message.
  • the terminal as the called party, sends the second target indication to the first AS of the terminal after receiving the paging message sent by the 5G network.
  • the upper layer of the terminal may be an IMS sublayer.
  • the method may further include : The first NAS of the terminal notifies the IMS sublayer of the terminal to wait for a response from the second NAS of the terminal.
  • the interaction between UE 5G NAS and IMS UE 5G NAS notifies the IMS layer that the UE wants to initiate EPS fallback (EPS fallback), so the IMS sublayer waits for the response from EPS NAS (that is, UE LTE NAS).
  • EPS fallback EPS fallback
  • the network side may carry first indication information in the paging message, and the first indication information includes at least one of the following: an indication to fall back to the second network,
  • the network side supports the instruction of fallback from the first network to the second network.
  • the paging message carries an EPS fallback indication (EPS fallback indication).
  • EPS fallback indication EPS fallback indication
  • the network side can instruct the terminal to fall back to the second network or instruct the network side of the terminal to support fallback from the first network to the second network by carrying the first indication information in the paging message, thereby making the terminal
  • the first NAS may send the second target indication to the first AS according to the first indication information to reselect to the second network.
  • the method may further include: the terminal sends a message to the network side.
  • a NAS message wherein the NAS message carries second indication information, and the second indication information indicates that the terminal has the ability to support a paging message carrying the first indication information.
  • the NAS message may be a registration message, for example, an initial registration message, or a registration message for mobility registration update.
  • One implementation method is to set the value of a certain bit (bit) of the 5GMM capability information element in the registration message to 1, which is used to indicate that the terminal has the ability to support the paging message carrying the first indication information.
  • bit a certain bit of the 5GMM capability information element in the registration message
  • the value of this bit The value is set to 0, which is used to indicate that the terminal does not have the ability to support the paging message carrying the first indication information.
  • the terminal may notify the network side when responding to the paging message to the network side. Therefore, in this possible implementation, after receiving the paging message, the method may further include: the terminal responds to the paging of the first network and sends a paging response, wherein in the paging response Carrying instructions to fall back to the second network.
  • the paging response may include a service request message
  • the indication of falling back to the second network may be an indication value in a request type information element in the service request message. That is to say, the terminal sets the value of the request type information element in the service request message to indicate Fall back to the indicated value of the second network.
  • the paging response may include a service request message, and the indication of falling back to the second network may be an EPS fallback information element in the service request message.
  • the first NAS of the terminal sending the second target indication to the first AS of the terminal may include: the first NAS of the terminal sending the second target indication to the first AS of the terminal according to the target information. Send secondary target instructions.
  • target information may include at least one of the following:
  • the first indication information sent by the network side device wherein the first indication information includes at least one of the following: an indication of fallback to the second network, and an indication that the network side supports fallback from the first network to the second network.
  • the first indication information may be system information broadcast by the network side device, or may be information carried in a paging message of the network side device paging the terminal.
  • the paging message The first instruction information carried in .
  • Capability information of the terminal wherein the capability information indicates that the terminal has the ability to fall back to the second network.
  • the first NAS may also directly send a second target indication to the first AS of the terminal after receiving the first target indication, without determining the target indication based on the target information.
  • a second target indication is sent to the first AS of the terminal.
  • S312 The first AS of the terminal triggers network reselection to the second network.
  • the first AS of the terminal may send an instruction to the second AS of the terminal, so that the second AS notifies the second NAS of the terminal to trigger reselection to the second network. Therefore, in a possible implementation, S312 may include:
  • Step 1 The first AS of the terminal sends a second indication to the second AS of the terminal, where,
  • the second instruction includes one of the following: an instruction to fall back to the second network, or an instruction to redirect to the second network.
  • the instructions sent by the UE 5G AS to the UE LTE AS may be one of the following: an instruction for the UE to perform EPS fallback or an instruction to redirect to LTE.
  • Step 2 The second AS of the terminal notifies the second NAS of the terminal to trigger reselection to the second network.
  • the second NAS and second AS of the terminal may be respectively the NAS and AS corresponding to the terminal and the second network.
  • the second NAS of the terminal is the LTE NAS of the terminal, or EPS mobility management (EPS Mobility Management (EMM)
  • EMM EPS Mobility Management
  • the second AS of the terminal is the LTE AS of the terminal.
  • the second AS of the terminal notifying the second NAS of the terminal to trigger reselection to the second network may include:
  • Step 1 The second AS of the terminal sends a notification to the second NAS of the terminal, where the notification carries an instruction to fall back to the second network.
  • the UE LTE AS can notify the UE EMM that EPS fallback is required.
  • Step 2 The second NAS of the terminal sends a third indication to the second AS of the terminal, where the third indication includes: an attach request or a TAU request.
  • Step 3 The second AS of the terminal initiates a Radio Resource Control (RRC) establishment process.
  • RRC Radio Resource Control
  • the second AS of the terminal sends a fourth instruction to the base station, wherein the fourth The instruction includes: an instruction to fall back to the second network, and the fourth instruction further includes: an attach request message or a TAU request message.
  • the UE LTE AS triggers the UE LTE cell selection and reselection. After discovering an allowed or suitable cell (allowed cell or suitable cell), the UE LTE AS initiates the RRC establishment process.
  • the UE LTE AS An indication of one of the following may be sent to the base station (e.g., eNB):
  • the method may further include:
  • Step 1 The second NAS of the terminal establishes a PDN connection for IMS services in the second network;
  • Step 2 The second NAS of the terminal sends a response indication to the IMS sublayer of the terminal, where the response indication is an indication that the PDN connection or EPS bearer for the IMS service is successfully established.
  • the UE LTE NAS sends one of the following instructions to the IMS layer:
  • the second AS may initiate an RRC establishment process after receiving an attach request or a TAU request sent by the second NAS of the terminal. That is, the second AS can initiate the RRC establishment process under the trigger of the second NAS.
  • the second AS may also initiate the RRC establishment process while sending a notification to the second NAS of the terminal. Since the second AS has already learned that it will fall back to the second network when sending the notification to the second NAS, the second AS can initiate the RRC establishment process at the same time to save time.
  • S314 The terminal performs voice services through the second network.
  • the second NAS of the terminal can interact with the IMS sublayer to perform voice services.
  • the first NAS of the UE can obtain the network's For the capability information of voice service falling back to 4G, when the UE triggers the calling voice or the called UE voice service, the first NAS of the UE can use at least one of the above network side capability information, its own capability information and historical call information. Item, determine to send an instruction to fall back to the second network or an instruction to redirect to the second network to the first AS, so that the first AS triggers the terminal to reselect to the second network, so that the terminal residing in the first network can Quickly fall back to the second network to perform voice services.
  • the UE can directly reselect to the cell of the second network to directly perform voice services, avoiding the process of the UE first entering the connected state in the first network and then falling back to the second network, thereby saving a certain amount of call time. extension.
  • the NG RAN or AMF may deliver first capability indication information to the UE.
  • the first capability indication information is used to indicate that the network side has the capability of EPS fallback, that is, the network side supports EPS fallback.
  • 5G UE's voice service can include the following steps.
  • Step 1.5G NAS decides to reselect to LTE and executes EPS fallback according to the following instructions.
  • the form of the instruction is one of the following:
  • UE IMS layer indication may include one of the following:
  • Instructions from the network side may include one of the following:
  • SIB System Information Block
  • the paging message carries the EPS fallback indication.
  • the UE carries a paging message (paging indication for EPS fallback) capability indication indicating that the terminal has support for carrying EPS fallback in the NAS message (eg, registration message) previously sent to the UE, or something similar. other instructions.
  • Step 2 After receiving the upper layer instruction in step 1, the UE 5G NAS (for example, it can be 5GMM) decides not to initiate the process of entering the 5G connected state according to the following conditions, but the UE actively triggers idle state reselection to LTE:
  • the UE 5G NAS for example, it can be 5GMM
  • UE historical call information indicates that the UE's historical calls are all voice calls obtained through EPS fallback
  • system broadcast the system broadcast indicates that the network supports EPS fallback
  • the UE 5G NAS can interact with the IMS: the UE 5G NAS notifies the IMS layer that the UE wants to initiate an EPS fallback, so the IMS layer waits for a response from the EPS NAS (UE LTE NAS).
  • the UE 5G NAS notifies the IMS layer that the UE wants to initiate an EPS fallback, so the IMS layer waits for a response from the EPS NAS (UE LTE NAS).
  • Step 3 UE 5G NAS (for example, 5GMM) and UE 5G AS interact.
  • the instructions sent by 5GMM to 5G AS may indicate one of the following:
  • Step 4 UE 5G AS and UE LTE AS interact.
  • the instructions sent by 5G AS to LTE AS may indicate one of the following:
  • Step 5 UE LTE AS notifies UE EMM that EPS fallback is to be performed, and UE EMM sends an attach request (attach request) or TAU request (request) to UE LTE AS.
  • UE LTE AS triggers UE LTE cell selection and reselection simultaneously.
  • Step 6 The UE LTE AS triggers UE LTE cell selection and reselection and finds allowed or suitable After the cell (allowed cell or suitable cell), the UE LTE AS initiates the RRC establishment process.
  • the UE LTE AS can send an indication to the network eNB.
  • the indication can include one of the following:
  • Step 7 After the UE enters the LTE connected state, completes the attach process or TAU process, and successfully establishes the PDN connection for the IMS service, the UE LTE NAS sends one of the following instructions to the IMS layer:
  • Step 8 Interaction between LTE NAS and IMS sublayers to implement voice services.
  • step 8 may include the following steps:
  • Step 8a EMM notifies ESM that Mobility Management (MM) connection is established.
  • MM Mobility Management
  • Step 8b The EMM notifies the IMS sublayer that the UE registers with the EPS.
  • Step 8c EMM notifies the ESM layer of bearer status information.
  • the following takes the calling voice service as an example to describe the technical solution provided by the embodiment of the present application through the interaction of various layers within the UE.
  • Figure 4 shows a schematic flow chart of a method for implementing a calling voice service in an embodiment of the present application. As shown in Figure 4, the method mainly includes the following steps.
  • the relevant instructions may be one of the following:
  • the UE 5G NAS (5GMM in the figure) decides not to initiate the process of entering the 5G connected state based on the following conditions, but the UE actively triggers idle state reselection to LTE:
  • UE historical call information indicates that the UE's historical calls are all voice calls obtained through EPS fallback
  • system broadcast the system broadcast indicates that the network supports EPS fallback
  • the method may also include S402a, interaction between UE 5G NAS and IMS: UE 5G NAS notifies the IM sub-S layer that the UE wants to initiate EPS fallback. Therefore, the IMS sub-layer waits for a response from EPS NAS (i.e. UE LTE NAS) . Under normal circumstances, after receiving the above instructions from the IMS sublayer, the UE 5G NAS should directly establish the relevant PDU session, and/or QoS flow for IMS signaling, MMTEL voice, MMTEL video or SMSoIP , MMTEL voice, MMTEL video, SMSoIP), and feeds back the establishment success message to the IMS layer. However, since the UE 5G NAS is determined to fall back to EPS, the UE 5G NAS notifies the IMS sublayer to wait for the EPS NAS (UE LTE NAS) response.
  • EPS NAS i.e. UE LTE NAS
  • UE 5G NAS (5GMM in the figure) interacts with UE 5G AS.
  • the instructions sent by 5GMM to 5G AS may indicate one of the following:
  • the instructions sent by the 5G AS to the LTE AS may indicate one of the following:
  • the UE LTE AS notifies the UE EMM that EPS fallback is to be performed, and the UE EMM sends the attach request or TAU request to the UE LTE AS.
  • UE LTE AS synchronization trigger UE LTE cell selection and reselection.
  • the UE LTE AS triggers the UE LTE cell selection and reselection. After discovering an allowed or suitable cell (allowed cell or suitable cell), the UE LTE AS initiates the RRC establishment process. Optionally, during the RRC establishment process, the UE LTE AS can send instructions to the network eNB, including one of the following:
  • the LTE NAS receives an attach accept message (attach accept) in response to the attach request or a TAU accept message (TAU accept) in response to the TAU request from the network side.
  • attach accept an attach accept message
  • TAU accept a TAU accept message
  • EMM notifies ESM that MM connection is established.
  • S408b The EMM notifies the IMS sublayer that the UE registers with the EPS.
  • EMM notifies the ESM layer of bearer status information.
  • the UE LTE NAS sends one of the following instructions to the IMS sublayer:
  • the UE when triggering the calling voice service, the UE can actively trigger network reselection to 4G based on at least one of the network side's capability information, historical call information, and its own capability information.
  • the cell is used to obtain VoLTE services. This prevents the UE from first entering the connected state in the 5G network and then falling back to 4G, thus saving a certain amount of call delay.
  • the following takes the called voice service as an example to describe the technical solution provided by the embodiment of the present application through the interaction of various layers within the UE.
  • Figure 5 shows a schematic flow chart of a method for implementing a called voice service in an embodiment of the present application. As shown in Figure 5, the method mainly includes the following steps.
  • the UE receives an instruction from the network, which can be one of the following:
  • SIB carries EPS fallback indication or SIB carries indication information indicating that the network side supports fallback from 5G to 4G);
  • the paging message carries an indication of EPS fallback.
  • the UE carries a paging message in the NAS message (for example, registration message) previously sent to the UE indicating that the terminal has an indication to support carrying EPS fallback.
  • Capability indication for paging message (paging indication for EPS fallback), or other similar indications.
  • the UE 5G NAS (GMM in the figure) decides not to initiate the process of entering the 5G connected state based on the following conditions, but the UE actively triggers idle state reselection to LTE:
  • UE historical call information indicates that the UE's historical calls are all voice calls obtained through EPS fallback
  • system broadcast the system broadcast indicates that the network supports EPS fallback
  • the method can also include S502a, interaction between UE 5G NAS and IMS: UE 5G NAS notifies the IMS layer that the UE wants to initiate EPS fallback, so the IMS sublayer waits for EPS NAS (UE LTE NAS) the response to.
  • UE 5G NAS should directly establish the relevant PDU session, and/or QoS flow for IMS signaling, MMTEL voice, MMTEL video or SMSoIP voice, MMTEL video, SMSoIP), and feeds back the establishment success message to the IMS layer.
  • the UE 5G NAS since the UE 5G NAS is determined to fall back to EPS, the UE 5G NAS notifies the IMS sublayer to wait for a response from the EPS NAS (UE LTE NAS).
  • the method may also include: S502b, the UE 5G NAS responds to the paging of the 5G network and sends a paging response to the 5GS, where the paging response carries an EPS fallback indication.
  • the paging response may include a service request message, and the indication of EPS fallback may be an indication value in the request type information element in the service request message. That is to say, the terminal sets the value of the request type information element in the service request message to the indication value indicating EPS fallback.
  • the paging response may include a service request message, and the indication of EPS fallback may be an EPS fallback information element in the service request message.
  • UE 5G NAS (5GMM in the figure) interacts with UE 5G AS.
  • the instructions sent by 5GMM to 5G AS may indicate one of the following:
  • the instructions sent by the 5G AS to the LTE AS may indicate one of the following:
  • the UE LTE AS notifies the UE EMM that EPS fallback is to be performed, and the UE EMM sends the attach request or TAU request to the UE LTE AS.
  • UE LTE AS triggers UE LTE cell selection and reselection simultaneously.
  • the UE LTE AS triggers the UE LTE cell selection and reselection. After discovering an allowed or suitable cell (allowed cell or suitable cell), the UE LTE AS initiates the RRC establishment process. Optionally, during the RRC establishment process, the UE LTE AS can send instructions to the network eNB, including one of the following:
  • the LTE NAS receives an attach accept message (attach accept) from the network side in response to the attach request or a TAU accept message (TAU accept) in response to the TAU request.
  • attach accept an attach accept message
  • TAU accept a TAU accept message
  • LTE NAS Interaction between LTE NAS and IMS layers. Specifically, as shown in Figure 5, it can include the following S508a, S508b, S508c and S508d.
  • EMM notifies ESM that MM connection is established.
  • S508b The EMM notifies the IMS sublayer that the UE registers with the EPS.
  • EMM notifies the ESM layer of bearer status information.
  • the UE LTE NAS sends one of the following instructions to the IMS sublayer:
  • the UE when triggering the called voice service, the UE can actively trigger network reselection to 4G based on at least one of the network side's capability information, historical call information, and its own capability information.
  • the cell is used to trigger VoLTE services. This prevents the UE from first entering the connected state in the 5G network and then falling back to 4G, thus saving a certain amount of call delay.
  • the execution subject may be a voice service implementation device.
  • the method of implementing the voice service performed by the voice service implementation device is used as an example to illustrate the voice service implementation device provided by the embodiment of the present application.
  • Figure 6 shows a schematic structural diagram of a voice service implementation device provided by an embodiment of the present application.
  • the device can be applied to a terminal.
  • the device mainly includes: an acquisition module 601, a trigger module 602 and an execution module 603. .
  • the acquisition module 601 is configured to send a second target indication to the first access layer AS of the terminal after acquiring the first target indication through the first NAS of the terminal residing in the first network.
  • the second target indication includes one of the following: an indication to fall back to the second network, an indication to redirect to the second network, and the first NAS of the terminal corresponds to the first network;
  • triggering module 602 configured to trigger network reselection to the second network through the first AS of the terminal, where the first AS of the terminal corresponds to the first network;
  • execution module 603, configured to execute through the second network Voice service.
  • the obtaining module 601 obtains the first target indication to include at least one of the following:
  • the first message from the first network is obtained through the first NAS of the terminal, where the first message includes a paging message.
  • the device further includes: a sending module 604, configured to respond to a paging message from the first network and send a paging response, where the paging response carries There are instructions to fall back to the second network.
  • a sending module 604 configured to respond to a paging message from the first network and send a paging response, where the paging response carries There are instructions to fall back to the second network.
  • the paging message carries first indication information
  • the first indication information includes at least one of the following: an indication of fallback to the second network, network side support for fallback from the first network to the third network.
  • the sending module 604 is also configured to send a NAS message to the network side, wherein the NAS message carries second indication information, and the second indication information indicates that the terminal has support for carrying the first Ability to indicate informational paging messages.
  • the triggering module 602 triggers network reselection to the second network through the first AS of the terminal, including:
  • the trigger module 602 is also used to:
  • the third indication includes: an attach request or a tracking area update TAU request;
  • the second AS of the terminal initiates a radio resource control RRC establishment process.
  • a fourth instruction is sent to the base station, where the fourth instruction includes: falling back to the second AS.
  • An indication from the network, the fourth indication further includes: an attach request message or a tracking area update TAU request message.
  • the device further includes: a receiving module, configured to receive an attach accept message from the network side in response to the attach request or a TAU accept message in response to the TAU request.
  • a receiving module configured to receive an attach accept message from the network side in response to the attach request or a TAU accept message in response to the TAU request.
  • the triggering module 602 is also configured to establish a PDN connection for IMS services in the second network, and send a response indication to the IMS sublayer of the terminal through the second NAS of the terminal. , wherein the response indication: an indication that the PDN connection or EPS bearer for the IMS service is successfully established.
  • the trigger module 602 initiates a radio resource control RRC establishment process through the second AS of the terminal, including:
  • a radio resource control RRC establishment process is initiated through the second AS of the terminal.
  • the upper layer of the terminal includes: IMS sublayer; the obtaining module 601 is further configured to, after obtaining the first indication from the IMS sublayer through the first NAS of the terminal, notify the The IMS sublayer of the terminal waits for a response from the second NAS of the terminal.
  • the obtaining module 601 sends a second target indication to the first access layer AS of the terminal through the first NAS of the terminal, including: according to the target information, through the third NAS of the terminal.
  • a NAS sends a second indication to the first access layer AS of the terminal.
  • the device for implementing the voice service in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip.
  • the electronic device may be a terminal or other devices other than the terminal.
  • terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in this embodiment of the application.
  • NAS Network Attached Storage
  • the voice service implementation device provided by the embodiments of this application can implement each process implemented by the terminal in the method embodiments of Figures 3 to 5, and achieve the same technical effect. To avoid duplication, details will not be described here.
  • this embodiment of the present application also provides a communication device 700, which includes a processor 701 and a memory 702.
  • the memory 702 stores programs or instructions that can be run on the processor 701, for example.
  • the communication device 700 is a terminal
  • the program or instruction is executed by the processor 701
  • each step of the above voice service implementation method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, it will not be described again here.
  • An embodiment of the present application also provides a terminal, which includes a processor and a communication interface.
  • the processor is used to implement each step of the above embodiment of the method for implementing the voice service, and the communication interface is used to communicate with an external device.
  • This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect.
  • FIG. 8 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 800 includes but is not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, a processor 810, etc. At least some parts.
  • the terminal 800 may also include a power supply (such as a battery) that supplies power to various components.
  • the power supply may be logically connected to the processor 810 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in FIG. 8 does not constitute a limitation on the terminal.
  • the terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.
  • the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042.
  • the graphics processor 8041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras).
  • the display unit 806 may include a display panel 8061, which may The display panel 8061 is configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072 . Touch panel 8071, also known as touch screen.
  • the touch panel 8071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 8072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.
  • the radio frequency unit 801 after receiving downlink data from the network side device, the radio frequency unit 801 can transmit it to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device.
  • the radio frequency unit 801 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.
  • Memory 809 may be used to store software programs or instructions as well as various data.
  • the memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc.
  • memory 809 may include volatile memory or non-volatile memory, or memory 809 may include both volatile and non-volatile memory.
  • non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory.
  • Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • DRAM synchronous dynamic random access memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM Double Data Rate SDRAM
  • DDRSDRAM double data rate synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM enhanced synchronous dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus
  • the processor 810 may include one or more processing units; optionally, the processor 810 integrates application Processor and modem processor, among which the application processor mainly processes operations involving the operating system, user interface and application programs, etc., and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above modem processor may not be integrated into the processor 810.
  • the processor 810 is configured to, after obtaining the first target indication through the first NAS of the terminal residing in the first network, send the second target indication to the first access layer AS of the terminal; through the terminal The first AS triggers network reselection to the second network; performs voice services through the second network; wherein the second target indication includes one of the following: an indication to fall back to the second network, redirection to the second network An indication of the network, the first NAS of the terminal corresponds to the first network, and the first AS of the terminal corresponds to the first network.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the readable storage medium.
  • the program or instructions are executed by a processor, each process of the above voice service implementation method embodiment is implemented, and can To achieve the same technical effect, to avoid repetition, we will not repeat them here.
  • the processor is the processor in the terminal described in the above embodiment.
  • the readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.
  • An embodiment of the present application further provides a chip.
  • the chip includes a processor and a communication interface.
  • the communication interface is coupled to the processor.
  • the processor is used to run programs or instructions to implement the method for implementing the above voice service.
  • Each process in the example can achieve the same technical effect. To avoid repetition, we will not repeat it here.
  • chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.
  • Embodiments of the present application further provide a computer program/program product.
  • the computer program/program product is stored in a storage medium.
  • the computer program/program product is executed by at least one processor to implement the above-mentioned voice service.
  • Each process of the method embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.
  • the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation.
  • the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology.
  • the computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of this application.

Abstract

本申请公开了一种语音业务的实现方法、装置及终端,属于无线通信领域,本申请实施例的一种语音业务的实现方法,包括:驻留在第一网络的终端的第一非接入层(Non Access Stratum,NAS)获取第一目标指示后,向所述终端的第一接入层(Access Stratum,AS)发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络;所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络;所述终端通过所述第二网络执行语音业务。

Description

语音业务的实现方法、装置及终端
交叉引用
本发明要求在2022年03月16日提交中国专利局、申请号为202210260559.2、发明名称为“语音业务的实现方法、装置及终端”的中国专利申请的优先权,该申请的全部内容通过引用结合在本发明中。
技术领域
本申请属于无线通信技术领域,具体涉及一种语音业务的实现方法、装置及终端。
背景技术
第五代(fifth generation,5G)网络商用部署后,可能存在使用第四代(fourth generation,4G)基于长期演进(long Term Evolution,LTE)的语音业务(Voice over LTE,VoLTE)业务来承接5G终端发起的主被叫语音业务的场景。例如,5G网络商用初期,有些运营商可能并不直接部署5G语音业务,而是使用4G VoLTE业务最大程度地发挥已有网络资源的作用;或者,5G网络一般高频覆盖范围小,一定数量的区域没有5G新空口(New Radio,NR)网络覆盖,则也需要借助4G LTE覆盖来接续语音业务;或者,5G网络容量受限,在5G网络负载较高时,运营商也希望能将用户的5G语音业务转移至4G网络中触发并执行。
上述场景中,存在一种终端初始在第一网络(例如,5G网络)注册并执行相关数据业务,但在需要执行语音业务(包括主叫或被叫)时能回落至第二网络(例如,4G网络)中去触发并执行该语音业务的需求。针对该需求,目前尚未给出快速有效的解决方式。
发明内容
本申请实施例提供一种语音业务的实现方法、装置及终端,能够解决驻留在第一网络的终端如何快速回落至第二网络执行语音业务的问题。
第一方面,提供了一种语音业务的实现方法,包括:驻留在第一网络的终端的第一非接入层(Non Access Stratum,NAS)获取第一目标指示后,向所述终端的第一接入层(Access Stratum,AS)发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络;所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络;所述终端通过所述第二网络执行语音业务。
第二方面,提供了一种语音业务的实现装置,应用于终端,所述装置包括:获取模块,用于在通过驻留在第一网络的终端的第一NAS获取第一目标指示后,向所述终端的第一接入层AS发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络;触发模块,用于通过所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络。
第三方面,提供了一种终端,该终端包括处理器和存储器,所述存储器存储可在所述处理器上运行的程序或指令,所述程序或指令被所述处理器执行时实现如第一方面所述的方法的步骤。
第四方面,提供了一种终端,包括处理器及通信接口,其中,所述处理器用于实现如第一方面所述的方法的步骤,所述通信接口用于与外部设备进行通信。
第五方面,提供了一种可读存储介质,所述可读存储介质上存储程序或指令,所述程序或指令被处理器执行时实现如第一方面所述的方法的步骤。
第六方面,提供了一种芯片,所述芯片包括处理器和通信接口,所述通信接口和所述处理器耦合,所述处理器用于运行程序或指令,实现如第一方面所述的方法的步骤。
第七方面,提供了一种计算机程序/程序产品,所述计算机程序/程序产品被存储在存储介质中,所述计算机程序/程序产品被至少一个处理器执行以实现如第一方面所述的方法的步骤。
在本申请实施例中,驻留在第一网络的终端的第一NAS获取第一目标指示后,向终端的第一AS发送回落到第二网络的指示或重定向到第二网络的指示,第一AS根据接收到的指示,触发进行网络重选到第二网络,然后终端通过所述第二网络执行语音业务,从而使得驻留在第一网络的终端可以快速回落至第二网络执行语音业务,并且,如果所述终端处于空闲状态,则终端无需先在第一网络进入连接态再回落至第二网络,而是直接进行网络重选,从而可以缩短语音业务的时延。
附图说明
图1示出本申请实施例可应用的一种无线通信系统的框图;
图2示出一种初始在5G网络注册的终端回落到4G网络实现语音业务的流程示意图;
图3示出本申请实施例提供的一种语音业务的实现方法的流程示意图;
图4示出本申请实施例中的一种主叫语音业务的实现方法的流程示意图;
图5示出本申请实施例提供的一种被叫语音业务的实现方法的流程示意图;
图6示出本申请实施例提供的一种语音业务的实现装置的结构示意图;
图7示出本申请实施例提供的一种通信设备的结构示意图;
图8示出本申请实施例提供的一种终端的硬件结构示意图。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员所获得的所有其他实施例,都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象,而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换,以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施,且“第一”、“第二”所区别的对象通常为一类,并不限定对象的个数,例如第一对象可以是一个,也可以是多个。此外,说明书以及权利要求中“和/或”表示所连接对象的至少其中之一,字符“/”一般表示前后关联对象是一种“或”的关系。
值得指出的是,本申请实施例所描述的技术不限于长期演进型(Long Term Evolution,LTE)/LTE的演进(LTE-Advanced,LTE-A)系统,还可用于其他无线通信系统,诸如码分多址(Code Division Multiple Access,CDMA)、时分多址(Time Division Multiple Access,TDMA)、频分多址(Frequency Division Multiple Access,FDMA)、正交频分多址(Orthogonal Frequency Division Multiple Access,OFDMA)、单载波频分多址(Single-carrier Frequency Division Multiple Access,SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用,所描述的技术既可用于以上提及的系统和无线电技术,也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio,NR)系统,并且在以下大部分描述中使用NR术语,但是这些技术也可应用于NR系统应用以外的应用,如第6代(6th Generation,6G)通信系统。
图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络侧设备12。其中,终端11可以是手机、平板电脑(Tablet  Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant,PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer,UMPC)、移动上网装置(Mobile Internet Device,MID)、增强现实(augmented reality,AR)/虚拟现实(virtual reality,VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(Vehicle User Equipment,VUE)、行人终端(Pedestrian User Equipment,PUE)、智能家居(具有无线通信功能的家居设备,如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer,PC)、柜员机或者自助机等终端侧设备,可穿戴式设备包括:智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。需要说明的是,在本申请实施例并不限定终端11的具体类型。网络侧设备12可以包括接入网设备和/或核心网设备,其中,接入网设备12也可以称为无线接入网设备、无线接入网(Radio Access Network,RAN)、无线接入网功能或无线接入网单元。接入网设备12可以包括基站、无线局域网(Wireless Local Area Network,WLAN)接入点或WiFi节点等,基站可被称为节点B、演进节点B(evolved Node B,eNB)、接入点、基收发机站(Base Transceiver Station,BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set,BSS)、扩展服务集(Extended Service Set,ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point,TRP)或所述领域中其他某个合适的术语,只要达到相同的技术效果,所述基站不限于特定技术词汇,需要说明的是,在本申请实施例中仅以NR系统中的基站为例进行介绍,并不限定基站的具体类型。核心网设备可以包含但不限于如下至少一项:核心网节点、核心网功能、移动管理实体(Mobility Management Entity,MME)、接入移动管理功能(Access and Mobility Management Function,AMF)、会话管理功能(Session Management Function,SMF)、用户平面功能(User Plane Function,UPF)、策略控制功 能(Policy Control Function,PCF)、策略与计费规则功能单元(Policy and Charging Rules Function,PCRF)、边缘应用服务发现功能(Edge Application Server Discovery Function,EASDF)、统一数据管理(Unified Data Management,UDM),统一数据仓储(Unified Data Repository,UDR)、归属用户服务器(Home Subscriber Server,HSS)、集中式网络配置(Centralized network configuration,CNC)、网络存储功能(Network Repository Function,NRF),网络开放功能(Network Exposure Function,NEF)、本地NEF(Local NEF,或L-NEF)、绑定支持功能(Binding Support Function,BSF)、应用功能(Application Function,AF)等。需要说明的是,在本申请实施例中仅以NR系统中的核心网设备为例进行介绍,并不限定核心网设备的具体类型。
针对在某些场景中存在的终端初始在5G网络注册并执行相关数据业务,但在需要执行语音业务(包括主叫或被叫)时能回落至4G网络中去触发并执行该语音业务的需求,图2示出了一种可能的解决方案,采用该解决方案能够使得5G终端(User Equipment,UE)在发起主被叫语音业务时可快速回落至4G并执行VoLTE。如图2所示,该解决方案主要包括以下步骤:
S201、UE在5G注册后,若发起主叫或被叫语音业务,语音业务建立请求信令(多媒体子系统(IP Multimedia Subsystem,IMS)会话初始协议(Session initialization Protocol,SIP)信令)触发5G核心网(5G Core Network,5GC)网络建立5G服务质量(Quality of Service,QoS)标识符(5G QoS Identifier,5QI)=1QoS流(flow)。
S202、5GC网络功能实体(Network Function,NF)向下一代无线接入网(Next Generation Radio Access Network,NG RAN)发起QoS flow建议请求,用于请求建立5QI=1 QoS flow对应空口隧道和N3隧道。
S203、NG RAN收到QoS flow建议请求(5QI=1)则触发UE切换或者重定向流程,用于将UE切换或重定向至4G LTE小区。
S204、NG RAN与核心网交互,拒绝修改协议数据单元(Protocol Data Unit, PDU)会话指示,执行多媒体子系统(IP Multimedia Subsystem,IMS)语音回落流程。
S205、UE切换或重定向至4G LTE小区。UE接入4G LTE小区后,在有N26接口部署情况下,执行S206a,在无N26接口部署情况下,执行S206b。
S206a、UE执行的跟踪区域更新(Tracking Area update,TAU)流程,用于在4G网络注册或位置更新。
S206b、UE执行附着(attach)并发建立切换附着(handover attach)类型分组数据网(Packet Data Network,PDN)连接流程。
在TAU流程或者attach流程结束后,UE重新在4G网络建立了IMS分组数据网(Packet Data Network,PDN)连接,该连接用于传输UE和IMS网络直接的信令。
S207、演进型分组核心网(Evolved Packet Core,EPC)网络根据IMS信令在4G网络触发QoS类标识符(QoS class identifier,QCI)=1承载建立,该承载用于传输VoLTE业务用户面数据。
S208、VoLTE主被叫建立完成,可正常通话。
对于原本处于空闲态的UE,如主叫发起5G语音业务,基于上述解决方案,UE需先发起5G业务请求(service request)流程先进入5G连接态,再触发上述流程步骤;对于原本处于空闲态的UE,如作为语音业务被叫方,基于上述机制,5G网络需先在5G小区中寻呼UE,使得其进入连接态,再触发上述流程步骤。由此可以看出,对于空闲态UE,采用上述解决方案,无论UE作为语音业务主叫方还是被叫方,UE都需要先进入5G网络连接态,再通过网络切换或其他方式而进入4G。这使得对空闲态UE发起5G语音业务的连续时延很长,用户体验较差。
下面结合附图,通过一些实施例及其应用场景对本申请实施例提供的语音业务的实现方案进行详细地说明。
图3示出本申请实施例中的传输方法的一种流程示意图,该方法300可 以由终端执行。换言之,所述方法可以由安装在终端上的软件或硬件来执行。如图3所示,该方法可以包括以下步骤。
S310,驻留在第一网络的终端的第一NAS获取第一目标指示后,向所述终端的第一AS发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示。
在本申请实施例中,驻留在第一网络的终端可以处于空闲态也可以处于连接态,具体本申请实施例中不作限定。第一网络和第二网络所采用的无线接入技术不同。
在本申请实施例中,第一网络包括但不限于5G网络,第二网络包括但不限于演进分组系统(Evolved Packet System,EPS)网络,也可以称为4G网络或LTE网络。
在本申请实施例中,所述终端的第一NAS是终端中与第一网络对应的NAS,例如,终端的5G NAS,即UE 5G NAS,进一步可以是5G移动性管理(5GS Mobility Management,5GMM)或5G会话管理(5GS Session Management,5GSM),所述终端的第一AS是终端中与第一网络对应的AS,例如,终端的5G AS,即UE 5G AS。
在本申请实施例的一个可能的实现方式中,终端的第一NAS获取第一目标指示可以为终端的第一NAS获取来自终端的上层的第一指示,该第一指示包括但不限于以下之一:
(1)多媒体电话业务(Multimedia telephone,MMTel)语音通话指示;
(2)MMTel语音通话开始指示;
(3)MMTel视频通话指示;
(4)MMTel视频通话开始指示;
(5)上行互联网协议(Internet Protocol,IP)多媒体子系统IMS注册相关信令指示;
(6)上行IMS注册相关信令开始指示;
(7)基于IP的短消息(Short Message Service over IP,SMSoIP)指示;
(8)SMSoIP开始指示。
也就是说,在上述可能的实现方式中,第一NAS在获取来自上层的第一指示后,确定回落到第二网络,向第一AS发送所述第二目标指示,使得第一AS触发进行网络重选至第二网络。例如,终端在发起主叫流程时,上层向第一NAS发送所述第一指示,第一NAS在接收到第一指示后,向第一AS发送所述第二目标指示。
在本申请实施例的另一个可能的实现方式中,第一NAS获取第一目标指示也可以为终端的第一NAS获取来自第一网络的第一消息。可选地,第一消息可以为寻呼(paging)消息。例如,终端作为被叫,在接收到5G网络发送的寻呼消息后,向终端的第一AS发送所述第二目标指示。
可选地,所述终端的上层可以为IMS子层。
在一个可能的实现方式中,由于第一NAS确定回落到第二网络,为了使得IMS子层可以获知该信息,在所述终端的第一NAS获取第一目标指示之后,所述方法还可以包括:所述终端的第一NAS通知所述终端的IMS子层等待所述终端的第二NAS的响应。例如,UE 5G NAS与IMS的交互:UE 5G NAS通知IMS层,UE要发起EPS回落(EPS fallback),因此IMS子层等待EPS NAS(即UE LTE NAS)的响应。
在一个可能的实现方式中,在网络侧可以在所述寻呼消息中携带第一指示信息,所述第一指示信息包括以下至少之一:回落到第二网络的指示、网 络侧支持从第一网络回落到第二网络的指示。例如,寻呼消息中携带有EPS回落指示(EPS fallback指示)。通过该可能的实现方式中,网络侧可以通过在寻呼消息中携带第一指示信息,指示终端回落到第二网络或指示终端网络侧支持从第一网络回落到第二网络,从而使得终端的第一NAS可以根据该第一指示信息,向第一AS发送所述第二目标指示,以重选至第二网络。
在上述可能的实现方式中,某些终端可能不具备支持携带回落到第二网络的指示的寻呼消息的能力,因此,为了使得终端能够与网络侧的理解一致,能够获取寻呼消息中携带的回落到第二网络的指示,在一个可能的实现方式中,在所述终端的第一NAS接收来自第一网络的第一消息之前,所述方法还可以包括:所述终端向网络侧发送NAS消息,其中,所述NAS消息中携带第二指示信息,所述第二指示信息指示所述终端具有支持携带所述第一指示信息的寻呼消息的能力。可选地,所述NAS消息可以是注册消息,例如,初始注册消息、或者是用于移动性注册更新的注册消息。一种实现方式是,注册消息中的5GMM能力信元的某个位(bit)的值设为1,用于指示终端具有支持携带所述第一指示信息的寻呼消息的能力,该bit的值设为0,用于指示终端不具有支持携带所述第一指示信息的寻呼消息的能力。
在一个可能的实现方式中,为了使得网络侧可以获知终端在接收到寻呼消息之后,回落到第二网络,终端可以在向网络侧响应寻呼消息时,通知网络侧。因此,在该可能的实现方式中,在接收所述寻呼消息之后,所述方法还可以包括:所述终端响应第一网络的寻呼,发送寻呼响应,其中,所述寻呼响应中携带有回落到第二网络的指示。
在一个可能的实现方式中,所述寻呼响应可以包括服务请求消息,所述回落到第二网络的指示可以为所述服务请求消息中的请求类型信元中的一个指示值。也就是说,终端将服务请求消息中的请求类型信元的值设置为指示 回落到第二网络的指示值。通过该可能的实现方式,可以减少信令的开销。
另一个可能的实现方式中,所述寻呼响应可以包括服务请求消息,所述回落到第二网络的指示可以为所述服务请求消息中的EPS fallback信元。
在一个可能的实现方式中,所述终端的第一NAS向所述终端的第一AS发送第二目标指示可以包括:所述终端的第一NAS根据目标信息,向所述终端的第一AS发送第二目标指示。
例如,目标信息可以包括以下至少之一:
(1)所述终端的历史呼叫信息,其中,所述历史呼叫信息指示所述终端在所述第一网络的历史语音业务是通过回落至所述第二网络执行的;
(2)网络侧设备发送的第一指示信息,其中,所述第一指示信息包括以下至少之一:回落到第二网络的指示、网络侧支持从第一网络回落到第二网络的指示。可选地,第一指示信息可以是网络侧设备广播的系统信息,或者,也可以是网络侧设备寻呼终端的寻呼消息中携带的信息,例如,上述可能的实现方式中,寻呼消息中携带的第一指示信息。
(3)所述终端的能力信息,其中,所述能力信息指示所述终端具有回落到所述第二网络的能力。
当然,也并不限于此,在实际应用中,第一NAS也可以在接收到第一目标指示后,直接向所述终端的第一AS发送第二目标指示,而不根据所述目标信息确定向所述终端的第一AS发送第二目标指示。
S312,终端的第一AS触发进行网络重选到第二网络。
在本申请实施例中,终端的第一AS可以通过向终端的第二AS发送指示,从而使得第二AS通知终端的第二NAS触发重选至第二网络。因此,在一个可能的实现方式中,S312可以包括:
步骤1,所述终端的第一AS向所述终端的第二AS发送第二指示,其中, 所述第二指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示。
例如,UE 5G AS和UE LTE AS交互,UE 5G AS向UE LTE AS发送的指示可能为以下之一:UE要进行EPS fallback的指示、重定向到LTE的指示。
步骤2,所述终端的第二AS通知所述终端的第二NAS触发重选至第二网络。
其中,所述终端的第二NAS、第二AS可以分别为终端与第二网络对应的NAS和AS,例如,所述终端的第二NAS为终端的LTE NAS,或者说是EPS移动性管理(EPS Mobility Management,EMM),所述终端的第二AS为终端的LTE AS。
在一个可能的实现方式中,所述终端的第二AS通知所述终端的第二NAS触发重选至第二网络可以包括:
步骤1,所述终端的第二AS向所述终端的第二NAS发送通知,其中,所述通知中携带有回落到第二网络的指示。
例如,UE LTE AS可以通知UE EMM需要进行EPS fallback。
步骤2,所述终端的第二NAS向所述终端的第二AS发送第三指示,其中,所述第三指示包括:附着请求或者TAU请求。
步骤3,所述终端的第二AS发起无线资源控制(Radio Resource Control,RRC)建立过程,在RRC建立过程中,所述终端的第二AS向基站发送第四指示,其中,所述第四指示包括:回落至第二网络的指示,所述第四指示还包括:附着请求消息或者TAU请求消息。
例如,UE LTE AS触发UE LTE小区选择和重选,发现允许或合适的小区(allowed cell or suitable cell)之后,UE LTE AS发起RRC建立过程,可选的,在RRC建立过程中,UE LTE AS可以向基站(例如,eNB)发送如下之一的指示:
-EPS fallback指示(UE到网络的);
-附着请求(attach request);
-TAU request。
在一个可能的实现方式中,在所述终端的第二NAS接收网络侧响应所述附着请求的附着接受消息或者响应所述TAU请求的TAU接受消息之后,所述方法还可以包括:
步骤1,所述终端的第二NAS在所述第二网络建立用于IMS业务的PDN连接;
步骤2,所述终端的第二NAS向所述终端的IMS子层发送响应指示,其中,所述响应指示:用于IMS业务的PDN连接或EPS承载建立成功的指示。
例如,UE进行LTE连接态之后,完成附着(attach)过程或者TAU过程,并且成功的建立用于IMS业务的PDN连接之后,UE LTE NAS向IMS层发送如下指示之一:
-用于IMS业务的PDN连接/EPS承载(bearer)建立成功的指示;
-EPS承载标识(EPS bearer identity,EBI)。
在一个可能的实现方式中,第二AS可以在接收到所述终端的第二NAS发送的附着请求或TAU请求之后,发起RRC建立过程。即第二AS可以在第二NAS的触发下,发起RRC建立过程。
或者,在另一个可能的实现方式中,第二AS也可以在向所述终端的第二NAS发送通知的同时,发起RRC建立过程。由于第二AS在向第二NAS发送通知时,已获知将回落到第二网络,因此,第二AS可以同时发起RRC建立过程,以节约时间。
S314,终端通过所述第二网络执行语音业务。
例如,在用于IMS业务的PDN连接建立成功之后,所述终端的第二NAS可以与IMS子层进行交互,从而执行语音业务。
通过本申请实施例提供的技术方案,使得UE的第一NAS能获取网络的 对于语音业务回落至4G的能力信息,当UE触发主叫语音或被叫UE语音业务时,UE的第一NAS可根据上述网络侧的能力信息、自身的能力信息以及历史呼叫信息中的至少一项,确定向第一AS发送回落到第二网络的指示或重定向到第二网络的指示,从而使得第一AS触发终端重选到第二网络,从而使得驻留在第一网络的终端可以快速回落至第二网络执行语音业务。
在本申请实施例中,UE可直接重选至第二网络的小区直接执行语音业务,避免了UE先在第一网络进入连接态再回落至第二网络的过程,从而可节省一定的呼叫时延。
下面以5G UE处于空闲态,作为语音业务的被叫方或主叫方为例,对本申请实施例提供的技术方案进行说明。
在本申请实施例中,NG RAN或AMF可以向UE下发第一能力指示信息,该第一能力指示信息用于指示网络侧具备EPS回落的能力,即网络侧支持EPS回落。5G UE进行语音业务可以包括以下步骤。
步骤1.5G NAS根据如下指示决定要重选到LTE,执行EPS fallback,指示的形式为如下之一:
(一)UE IMS层的指示,可以包括以下之一:
-MMTel语音通话指示或者开始指示((start of)an MMTEL voice call from the upper layers);
-MMTel视频通话指示或者开始指示((start of)MMTEL video call from the upper layers);
-IMS注册相关信令指示或者开始指示((start of)an MO IMS registration related signalling from the upper layers);
-SMSoIP指示或者开始指示((start of)SMSoIP from the upper layers)。
(二)网络侧的指示,可以包括以下之一:
-paging消息+系统广播系统信息块(System Information Block,SIB)(SIB中包括EPS fallback指示);
-paging消息(该paging消息中携带EPS fallback的指示)。在这种情况下,UE在之前发送给的NAS消息(例如,注册消息)中携带了指示终端具有支持携带EPS回落的指示的寻呼消息(paging indication for EPS fallback)人能力指示,或者是类似的其他指示。
步骤2,UE 5G NAS(例如,可以为5GMM)接受到步骤1中的上层指示后,根据以下条件,决定不发起进入到5G连接态的过程,而是UE主动触发空闲态重选到LTE:
-UE历史呼叫信息(UE历史呼叫信息指示UE的历史呼叫都是通过EPS fallback获取话音呼叫的);
-UE 5G AS提供的信息,例如:系统广播(该系统广播指示网络支持EPS fallback)。
可选地,对于主叫语音业务,UE 5G NAS可以与IMS的交互:UE 5G NAS通知IMS层,UE要发起EPS fallback,因此IMS层等待EPS NAS(UE LTE NAS)的响应。
步骤3,UE 5G NAS(例如,5GMM)和UE 5G AS交互,5GMM发给5G AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-重定向到LTE(redirect to LTE)。
步骤4,UE 5G AS和UE LTE AS交互,5G AS发给LTE AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-重定向到LTE(redirect to LTE)。
步骤5,UE LTE AS通知UE EMM,要进行EPS fallback,UE EMM将附着请求(attach request)或者TAU请求(request)发送给UE LTE AS。可选的,UE LTE AS同步触发UE LTE小区选择和重选。
步骤6,UE LTE AS触发UE LTE小区选择和重选,发现允许或合适的 小区(allowed cell or suitable cell)之后,UE LTE AS发起RRC建立过程,可选的,在RRC建立过程中,UE LTE AS可以向网络eNB发送指示,该指示可以包含如下之一:
-EPS fallback指示(UE到网络的);
-attach request;
-TAU request。
步骤7,UE进入LTE连接态之后,完成附着(attach)过程或者TAU过程,并且成功的建立用于IMS业务的PDN连接之后,UE LTE NAS向IMS层发送如下指示之一:
-用于IMS业务的PDN连接/EPS bearer建立成功;
-EBI。
步骤8,LTE NAS和IMS子层的交互,实现语音业务,可选地,步骤8可以包括以下步骤:
步骤8a,EMM通知ESM移动管理(Mobility Management,MM)连接建立。
步骤8b,EMM通知IMS子层UE注册到EPS。
步骤8c,EMM通知ESM层bearer status信息。
下面以主叫语音业务为例,通过UE内部各层的交互,对本申请实施例提供的技术方案进行说明。
图4示出本申请实施例中的一种主叫语音业务的实现方法的流程示意图,如图4所示,该方法主要包括以下步骤。
S401,UE需要发起MO呼叫,IMS子层发送相关指示给UE 5G NAS层,相关指示可能为以下之一:
-(start of)an MMTEL voice call from the upper layers;
-(start of)MMTEL video call from the upper layers;
-(start of)an MO IMS registration related signaling from the upper layers;
-(start of)SMSoIP from the upper layers。
S402,UE 5G NAS(图中为5GMM)接受到S401中的上层指示后,根据以下条件,决定不发起进入到5G连接态的过程,而是UE主动触发空闲态重选到LTE:
-UE历史呼叫信息(UE历史呼叫信息指示UE的历史呼叫都是通过EPS fallback获取话音呼叫的);
-UE 5G AS提供的信息,例如:系统广播(该系统广播指示网络支持EPS fallback)。
可选地,该方法还可以包括S402a,UE 5G NAS与IMS的交互:UE 5G NAS通知IM子S层,UE要发起EPS fallback,因此,IMS子层等待EPS NAS(即UE LTE NAS)的响应。在正常情况下,UE 5G NAS在接收到IMS子层的上述指示后,应该直接建立相关的PDU会话,和/或,IMS信号、MMTEL语音、MMTEL视频或SMSoIP的QoS流(QoS flow for IMS signaling、MMTEL voice、MMTEL video、SMSoIP),并将建立成功消息反馈给IMS层,然而,由于UE 5G NAS确定要回落到EPS,因此,UE 5G NAS通知IMS子层等待EPS NAS(UE LTE NAS)的响应。
S403,UE 5G NAS(图中为5GMM)和UE 5G AS交互,5GMM发给5G AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-重定向到LTE。
S404,UE 5G AS和UE LTE AS交互,5G AS发给LTE AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-重定向到LTE。
S405,UE LTE AS通知UE EMM,要进行EPS fallback,UE EMM将attach request或者TAU request发送给UE LTE AS。可选的,UE LTE AS同步触发 UE LTE小区选择和重选。
S406.UE LTE AS触发UE LTE小区选择和重选,发现允许或合适的小区(allowed cell or suitable cell)之后,UE LTE AS发起RRC建立过程。可选的,在RRC建立过程中,UE LTE AS可以向网络eNB发送指示,包含如下之一:
-EPS fallback指示(UE到网络的);
-attach request;
-TAU request。
S407.LTE NAS接收网络侧的响应所述附着请求的附着接受消息(attach accept)或者响应所述TAU请求的TAU接受消息(TAU accept)。
S408.LTE NAS和IMS层的交互。具体地,如图5所示,可以包括以下S408a、S408b、S408c和S408d。
S408a,EMM通知ESM MM连接建立。
S408b,EMM通知IMS子层UE注册到EPS。
S408c,EMM通知ESM层承载状态(bearer status)信息。
S408d,UE进入LTE连接态之后,完成attach过程或者TAU过程,并且成功的建立用于IMS业务的PDN连接之后,UE LTE NAS向IMS子层发送如下指示之一:
-用于IMS业务的PDN连接或EPS承载(bearer)建立成功的指示;
-EBI。
通过本申请实施例提供的上述技术方案,UE在触发主叫语音业务时,可以根据网络侧的能力信息、历史呼叫信息、自身的能力信息中的至少之一,主动触发进行网络重选至4G小区用于获取VoLTE业务。避免了UE先在5G网络进入连接态再回落至4G,从而可节省一定的呼叫时延。
下面以被叫语音业务为例,通过UE内部各层的交互,对本申请实施例提供的技术方案进行说明。
图5示出本申请实施例中的一种被叫语音业务的实现方法的流程示意图, 如图5所示,该方法主要包括以下步骤。
S501.UE收到网络的指示,该指示可以为如下之一:
-paging消息+系统广播SIB(SIB中携带有EPS fallback指示或者SIB中携带有指示网络侧支持从5G回落到4G的指示信息);
-paging消息(该paging消息中携带有EPS fallback的指示),在这种情况下,UE在之前发送给的NAS消息(例如,注册消息)中携带了指示终端具有支持携带EPS回落的指示的寻呼消息(paging indication for EPS fallback)的能力指示,或者是类似的其他指示。
S502,UE 5G NAS(图中为5GMM)接受到S501中的上层指示后,根据以下条件,决定不发起进入到5G连接态的过程,而是UE主动触发空闲态重选到LTE:
-UE历史呼叫信息(UE历史呼叫信息指示UE的历史呼叫都是通过EPS fallback获取话音呼叫的);
-UE 5G AS提供的信息,例如:系统广播(该系统广播指示网络支持EPS fallback);
可选地,如图5所示,该方法还可以包括S502a,UE 5G NAS与IMS的交互:UE 5G NAS通知IMS层,UE要发起EPS fallback,因此IMS子层等待EPS NAS(UE LTE NAS)的响应。在正常情况下,UE 5G NAS在接收到S501中的指示后,应该直接建立相关的PDU会话,和/或,IMS信号、MMTEL语音、MMTEL视频或SMSoIP的QoS流(QoS flow for IMS signaling、MMTEL voice、MMTEL video、SMSoIP),并将建立成功消息反馈给IMS层,然而,由于UE 5G NAS确定要回落到EPS,因此,UE 5G NAS通知IMS子层等待EPS NAS(UE LTE NAS)的响应。
另外,如图5所示,该方法还可以包括:S502b,UE 5G NAS响应5G网络的寻呼,向5GS发送寻呼响应,其中,所述寻呼响应中携带有EPS fallback指示。
在一个可能的实现方式中,所述寻呼响应可以包括服务请求消息,所述EPS fallback的指示可以为所述服务请求消息中的请求类型信元中的一个指示值。也就是说,终端将服务请求消息中的请求类型信元的值设置为指示EPS fallback的指示值。通过该可能的实现方式,可以减少信令的开销。另一个可能的实现方式中,所述寻呼响应可以包括服务请求消息,所述EPS fallback的指示可以为所述服务请求消息中的EPS fallback信元。
S503,UE 5G NAS(图中为5GMM)和UE 5G AS交互,5GMM发给5G AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-redirect to LTE。
S504,UE 5G AS和UE LTE AS交互,5G AS发给LTE AS的指示可能指示以下之一:
-UE要进行EPS fallback;
-重定向到LTE。
S505,UE LTE AS通知UE EMM,要进行EPS fallback,UE EMM将attach request或者TAU request发送给UE LTE AS。可选的,UE LTE AS同步触发UE LTE小区选择和重选。
S506.UE LTE AS触发UE LTE小区选择和重选,发现允许或合适的小区(allowed cell or suitable cell)之后,UE LTE AS发起RRC建立过程。可选的,在RRC建立过程中,UE LTE AS可以向网络eNB发送指示,包含如下之一:
-EPS fallback指示(UE到网络的);
-attach request;
-TAU request。
S507.LTE NAS接收网络侧的响应所述附着请求的附着接受消息(attach accept)或者响应所述TAU请求的TAU接受消息(TAU accept)。
S508.LTE NAS和IMS层的交互。具体地,如图5所示,可以包括以下 S508a、S508b、S508c和S508d。
S508a,EMM通知ESM MM连接建立。
S508b,EMM通知IMS子层UE注册到EPS。
S508c,EMM通知ESM层承载状态(bearer status)信息。
S508d,UE进入LTE连接态之后,完成attach过程或者TAU过程,并且成功的建立用于IMS业务的PDN连接之后,UE LTE NAS向IMS子层发送如下指示之一:
-用于IMS业务的PDN连接或EPS承载(bearer)建立成功的指示;
-EBI。
通过本申请实施例提供的上述技术方案,UE在触发被叫语音业务时,可以根据网络侧的能力信息、历史呼叫信息、自身的能力信息中的至少之一,主动触发进行网络重选至4G小区用于触发VoLTE业务。避免了UE先在5G网络进入连接态再回落至4G,从而可节省一定的呼叫时延。
本申请实施例提供的语音业务的实现方法,执行主体可以为语音业务的实现装置。本申请实施例中以语音业务的实现装置执行语音业务的实现方法为例,说明本申请实施例提供的语音业务的实现装置。
图6示出本申请实施例提供的一种语音业务的实现装置的结构示意图,该装置可以应用于终端,如图6所示,该装置主要包括:获取模块601、触发模块602和执行模块603。
在本申请实施例中,获取模块601,用于在通过驻留在第一网络的终端的第一NAS获取第一目标指示后,向所述终端的第一接入层AS发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络;触发模块602,用于通过所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络;执行模块603,用于通过所述第二网络执行语音业务。
在一个可能的实现方式中,所述获取模块601获取第一目标指示包括以下至少之一:
通过所述终端的第一NAS获取来自所述终端的上层的第一指示;或者,
通过所述终端的第一NAS获取来自第一网络的第一消息,其中,所述第一消息包括寻呼消息。
在一个可能的实现方式中,如图6所示,所述装置还包括:发送模块604,用于响应来自第一网络的寻呼消息,发送寻呼响应,其中,所述寻呼响应中携带有回落到第二网络的指示。
在一个可能的实现方式中,所述寻呼消息中携带第一指示信息,所述第一指示信息包括以下至少之一:回落到第二网络的指示、网络侧支持从第一网络回落到第二网络的指示;所述发送模块604还用于向网络侧发送NAS消息,其中,所述NAS消息中携带第二指示信息,所述第二指示信息指示所述终端具有支持携带所述第一指示信息的寻呼消息的能力。
在一个可能的实现方式中,所述触发模块602通过所述终端的第一AS触发进行网络重选到第二网络包括:
通过所述终端的第一AS向所述终端的第二AS发送第二指示,其中,所述第二指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示;
通过所述终端的第二AS通知所述终端的第二NAS触发重选至第二网络。
在一个可能的实现方式中,所述触发模块602还用于:
通过所述终端的第二AS向所述终端的第二NAS发送通知,其中,所述通知中携带有回落到第二网络的指示;
通过所述终端的第二NAS向所述终端的第二AS发送第三指示,其中,所述第三指示包括:附着请求或者跟踪区更新TAU请求;
通过所述终端的第二AS发起无线资源控制RRC建立过程,在RRC建立过程中,并向基站发送第四指示,其中,所述第四指示包括:回落至第二 网络的指示,所述第四指示还包括:附着请求消息或者跟踪区更新TAU请求消息。
在一个可能的实现方式中,如图6所示,所述装置还包括:接收模块,用于接收网络侧响应所述附着请求的附着接受消息或者响应所述TAU请求的TAU接受消息。
在一个可能的实现方式中,所述触发模块602还用于在所述第二网络建立用于IMS业务的PDN连接,通过所述终端的第二NAS向所述终端的IMS子层发送响应指示,其中,所述响应指示:用于IMS业务的PDN连接或EPS承载建立成功的指示。
在一个可能的实现方式中,所述触发模块602通过所述终端的第二AS发起无线资源控制RRC建立过程,包括:
在接收到所述附着请求或跟踪区更新TAU请求之后,通过所述终端的第二AS发起无线资源控制RRC建立过程;或者,
在向所述终端的第二NAS发送通知的同时,通过所述终端的第二AS发起无线资源控制RRC建立过程。
在一个可能的实现方式中,所述终端的上层包括:IMS子层;所述获取模块601,还用于通过所述终端的第一NAS获取来自IMS子层的第一指示之后,通知所述终端的IMS子层等待所述终端的第二NAS的响应。
在一个可能的实现方式中,所述获取模块601通过所述终端的第一NAS向所述终端的第一接入层AS发送第二目标指示,包括:根据目标信息,通过所述终端的第一NAS向所述终端的第一接入层AS发送第二指示。
本申请实施例中的语音业务的实现装置可以是电子设备,例如具有操作系统的电子设备,也可以是电子设备中的部件,例如集成电路或芯片。该电子设备可以是终端,也可以为除终端之外的其他设备。示例性的,终端可以包括但不限于上述所列举的终端11的类型,其他设备可以为服务器、网络附属存储器(Network Attached Storage,NAS)等,本申请实施例不作具体限 定。
本申请实施例提供的语音业务的实现装置能够实现图3至图5的方法实施例中终端实现的各个过程,并达到相同的技术效果,为避免重复,这里不再赘述。
可选的,如图7所示,本申请实施例还提供一种通信设备700,包括处理器701和存储器702,存储器702上存储有可在所述处理器701上运行的程序或指令,例如,该通信设备700为终端时,该程序或指令被处理器701执行时实现上述语音业务的实现方法实施例的各个步骤,且能达到相同的技术效果,为避免重复,这里不再赘述。
本申请实施例还提供一种终端,包括处理器和通信接口,处理器用于实现上述语音业务的实现方法实施例的各个步骤,通信接口用于与外部设备进行通信。该终端实施例与上述终端侧方法实施例对应,上述方法实施例的各个实施过程和实现方式均可适用于该终端实施例中,且能达到相同的技术效果。具体地,图8为实现本申请实施例的一种终端的硬件结构示意图。
该终端800包括但不限于:射频单元801、网络模块802、音频输出单元803、输入单元804、传感器805、显示单元806、用户输入单元807、接口单元808、存储器809以及处理器810等中的至少部分部件。
本领域技术人员可以理解,终端800还可以包括给各个部件供电的电源(比如电池),电源可以通过电源管理系统与处理器810逻辑相连,从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。图8中示出的终端结构并不构成对终端的限定,终端可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置,在此不再赘述。
应理解的是,本申请实施例中,输入单元804可以包括图形处理单元(Graphics Processing Unit,GPU)8041和麦克风8042,图形处理器8041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元806可包括显示面板8061,可以 采用液晶显示器、有机发光二极管等形式来配置显示面板8061。用户输入单元807包括触控面板8071以及其他输入设备8072中的至少一种。触控面板8071,也称为触摸屏。触控面板8071可包括触摸检测装置和触摸控制器两个部分。其他输入设备8072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆,在此不再赘述。
本申请实施例中,射频单元801接收来自网络侧设备的下行数据后,可以传输给处理器810进行处理;另外,射频单元801可以向网络侧设备发送上行数据。通常,射频单元801包括但不限于天线、放大器、收发信机、耦合器、低噪声放大器、双工器等。
存储器809可用于存储软件程序或指令以及各种数据。存储器809可主要包括存储程序或指令的第一存储区和存储数据的第二存储区,其中,第一存储区可存储操作系统、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外,存储器809可以包括易失性存储器或非易失性存储器,或者,存储器809可以包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synch link DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DRRAM)。本申请实施例中的存储器809包括但不限于这些和任意其它适合类型的存储器。
处理器810可包括一个或多个处理单元;可选的,处理器810集成应用 处理器和调制解调处理器,其中,应用处理器主要处理涉及操作系统、用户界面和应用程序等的操作,调制解调处理器主要处理无线通信信号,如基带处理器。可以理解的是,上述调制解调处理器也可以不集成到处理器810中。
其中,处理器810,用于在通过驻留在第一网络的终端的第一NAS获取第一目标指示后,向所述终端的第一接入层AS发送第二目标指示;通过所述终端的第一AS触发进行网络重选到第二网络;通过所述第二网络执行语音业务;其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络,所述终端的第一AS对应于所述第一网络。
本申请实施例还提供一种可读存储介质,所述可读存储介质上存储有程序或指令,该程序或指令被处理器执行时实现上述语音业务的实现方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。
其中,所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质,包括计算机可读存储介质,如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。
本申请实施例另提供了一种芯片,所述芯片包括处理器和通信接口,所述通信接口和所述处理器耦合,所述处理器用于运行程序或指令,实现上述语音业务的实现方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。
应理解,本申请实施例提到的芯片还可以称为系统级芯片,系统芯片,芯片系统或片上系统芯片等。
本申请实施例另提供了一种计算机程序/程序产品,所述计算机程序/程序产品被存储在存储介质中,所述计算机程序/程序产品被至少一个处理器执行以实现上述上述语音业务的实现方法实施例的各个过程,且能达到相同的技术效果,为避免重复,这里不再赘述。
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变 体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外,需要指出的是,本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能,还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能,例如,可以按不同于所描述的次序来执行所描述的方法,并且还可以添加、省去、或组合各种步骤。另外,参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以计算机软件产品的形式体现出来,该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端(可以是手机,计算机,服务器,空调器,或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述,但是本申请并不局限于上述的具体实施方式,上述的具体实施方式仅仅是示意性的,而不是限制性的,本领域的普通技术人员在本申请的启示下,在不脱离本申请宗旨和权利要求所保护的范围情况下,还可做出很多形式,均属于本申请的保护之内。

Claims (19)

  1. 一种语音业务的实现方法,包括:
    驻留在第一网络的终端的第一非接入层NAS获取第一目标指示后,向所述终端的第一接入层AS发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第一NAS对应于所述第一网络;
    所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络;
    所述终端通过所述第二网络执行语音业务。
  2. 根据权利要求1所述的方法,其中,所述终端的第一NAS获取第一目标指示包括:
    所述终端的第一NAS获取来自所述终端的上层的第一指示;或者,
    所述终端的第一NAS获取来自第一网络的第一消息。
  3. 根据权利要求2所述的方法,其中,所述第一指示包括以下之一:
    多媒体电话业务MMTel语音通话指示;
    MMTel语音通话开始指示;
    MMTel视频通话指示;
    MMTel视频通话开始指示;
    上行IP多媒体子系统IMS注册相关信令指示;
    上行IMS注册相关信令开始指示;
    基于IP的短消息SMSoIP指示;
    SMSoIP开始指示。
  4. 根据权利要求2所述的方法,其中,所述第一消息包括:寻呼所述终端的寻呼消息。
  5. 根据权利要求1所述的方法,其中,所述终端的第一AS触发终端重选到第二网络,包括:
    所述终端的第一AS向所述终端的第二AS发送第二指示,其中,所述第二指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示,所述终端的第二AS对应于所述第二网络;
    所述终端的第二AS通知所述终端的第二NAS触发重选至第二网络,其中,所述终端的第二NAS对应于所述第二网络。
  6. 根据权利要求5所述的方法,其中,所述终端的第二AS通知所述终端的第二NAS触发重选至第二网络,包括:
    所述终端的第二AS向所述终端的第二NAS发送通知,其中,所述通知中携带有回落到第二网络的指示;
    所述终端的第二NAS向所述终端的第二AS发送第三指示,其中,所述第三指示包括:附着请求或者跟踪区更新TAU请求;
    所述终端的第二AS发起无线资源控制RRC建立过程,在RRC建立过程中,所述终端的第二AS向基站发送第四指示,其中,所述第四指示包括:回落至第二网络的指示,所述第四指示还包括:附着请求消息或者跟踪区更新TAU请求消息。
  7. 根据权利要求6所述的方法,其中,在所述终端的第二NAS向所述终端的第二AS发送第三指示之后,所述方法还包括:所述终端的第二NAS接收网络侧响应所述附着请求的附着接受消息或者响应所述TAU请求的 TAU接受消息。
  8. 根据权利要求7所述的方法,其中,在所述终端的第二NAS接收网络侧响应所述附着请求的附着接受消息或者响应所述TAU请求的TAU接受消息之后,所述方法还包括:
    所述终端的第二NAS在所述第二网络建立用于IMS业务的PDN连接;
    所述终端的第二NAS向所述终端的IMS子层发送响应指示,其中,所述响应指示:用于IMS业务的PDN连接或EPS承载建立成功的指示。
  9. 根据权利要求6所述的方法,其中,所述终端的第二AS发起无线资源控制RRC建立过程,包括:
    所述终端的第二AS在接收到所述终端的第二NAS发送的附着请求或TAU请求之后,发起RRC建立过程;或者,
    所述终端的第二AS在向所述终端的第二NAS发送通知的同时,发起RRC建立过程。
  10. 根据权利要求2至9任一项所述的方法,其中,所述终端的上层包括:IMS子层。
  11. 根据权利要求10所述的方法,其中,在所述终端的第一NAS获取来自所述终端的IMS子层的第一指示之后,所述方法还包括:
    所述终端的第一NAS通知所述终端的IMS子层等待所述终端的第二NAS的响应。
  12. 根据权利要求1至9任一项所述的方法,其中,所述终端的第一NAS向所述终端的第一接入层AS发送第二目标指示,包括:
    所述终端的第一NAS根据目标信息,向所述终端的第一接入层AS发送 第二目标指示。
  13. 根据权利要求12所述的方法,其中,所述目标信息包括以下至少之一:
    所述终端的历史呼叫信息,其中,所述历史呼叫信息指示所述第一网络的历史语音业务是通过回落至所述第二网络执行的;
    网络侧设备发送的第一指示信息,其中,所述第一指示信息包括以下至少之一:回落到第二网络的指示、网络侧支持从第一网络回落到第二网络的指示;
    所述终端的能力信息,其中,所述能力信息指示所述终端具有回落到所述第二网络的能力。
  14. 根据权利要求13所述的方法,其中,所述网络侧设备发送的第一指示信息,包括:
    网络侧设备广播的系统信息;或者,
    网络侧设备寻呼所述终端的寻呼消息中携带的信息。
  15. 根据权利要求1至9任一项所述的方法,其中,所述第一网络为5G网络,所述第二网络为演进分组系统EPS网络。
  16. 根据权利要求1至9任一项所述的方法,其中,所述回落到第二网络的指示为EPS回落指示。
  17. 一种语音业务的实现装置,包括:
    获取模块,用于在通过驻留在第一网络的终端的第一NAS获取第一目标指示后,向所述终端的第一接入层AS发送第二目标指示,其中,所述第二目标指示包括以下之一:回落到第二网络的指示、重定向到第二网络的指示, 所述终端的第一NAS对应于所述第一网络;
    触发模块,用于通过所述终端的第一AS触发进行网络重选到第二网络,其中,所述终端的第一AS对应于所述第一网络;
    执行模块,用于通过所述第二网络执行语音业务。
  18. 一种终端,包括处理器和存储器,所述存储器存储可在所述处理器上运行的程序或指令,所述程序或指令被所述处理器执行时实现如权利要求1至16任一项所述的语音业务的实现方法的步骤。
  19. 一种可读存储介质,所述可读存储介质上存储程序或指令,所述程序或指令被处理器执行时实现如权利要求1至16任一项所述的语音业务的实现方法的步骤。
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QUALCOMM INCORPORATED: "Discussion on RAN slicing enhancement", 3GPP DRAFT; R2-2006767, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Electronic; 20200817 - 20200828, 7 August 2020 (2020-08-07), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051911674 *

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