CN112468981B - Communication method, device and equipment - Google Patents

Communication method, device and equipment Download PDF

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Publication number
CN112468981B
CN112468981B CN202011348905.XA CN202011348905A CN112468981B CN 112468981 B CN112468981 B CN 112468981B CN 202011348905 A CN202011348905 A CN 202011348905A CN 112468981 B CN112468981 B CN 112468981B
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network
voice
tau
special
bearer
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CN112468981A (en
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李馥馨
马逸扬
包蕾
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Beijing Ziguang Zhanrui Communication Technology Co Ltd
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Priority to PCT/CN2021/130466 priority patent/WO2022111316A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • 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
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application provides a communication method, a communication device and communication equipment, wherein the method comprises the following steps: in a tracking area update TAU flow, a terminal device receives a special bearer establishment request sent by a network device through a second network, wherein the TAU flow is used for the terminal device to fall back to the second network from a first network; and the terminal equipment establishes a voice special bearer according to the special bearer establishing request, wherein the voice special bearer is used for voice service of the terminal equipment in the second network.

Description

Communication method, device and equipment
Technical Field
The embodiment of the application relates to the technical field of communication, in particular to a communication method, a communication device and communication equipment.
Background
A terminal device (e.g., a mobile phone, a tablet computer, etc.) may access a New Radio (NR) network, and may also access a Long Term Evolution (LTE) network.
When the terminal device is in the NR network, if the terminal device has a requirement for a voice service, the terminal device may fall back from the NR network to the LTE network, and perform the voice service in the LTE network. In the process that the terminal device falls back to the LTE network from the NR network, the terminal device needs to perform Tracking Area Update (TAU), and in the TAU process, the terminal device cannot create a dedicated voice bearer in the LTE network, so that voice call fails, and thus communication reliability is poor.
Disclosure of Invention
The embodiment of the application provides a communication method, a communication device and communication equipment. The probability of telephone call-through is improved, and the reliability of communication is further improved.
In a first aspect, an embodiment of the present application provides a communication method, including:
in a tracking area update TAU flow, a terminal device receives a special bearer establishment request sent by a network device through a second network, wherein the TAU flow is used for the terminal device to fall back to the second network from a first network;
and the terminal equipment establishes a voice special bearer according to the special bearer establishing request, wherein the voice special bearer is used for voice service of the terminal equipment in the second network.
In a possible implementation manner, the establishing, by the terminal device, a voice-specific bearer according to the specific bearer establishment request includes:
and the terminal equipment sends a special bearing receiving message to the network equipment according to the special bearing establishing request, wherein the special bearing receiving message is used for finishing establishing the voice special bearing.
In a possible implementation manner, the establishing, by the terminal device, a voice-specific bearer according to the specific bearer establishment request includes:
after the TAU is completed, the terminal equipment establishes a voice special bearer according to the special bearer establishment request; or,
and before the TAU is completed, the terminal equipment establishes the voice special bearer according to the special bearer establishment request.
In a possible implementation manner, after the TAU is completed, the establishing, by the terminal device, a voice-specific bearer according to the specific bearer establishment request includes:
the terminal equipment stores the special bearing establishment request in a preset storage space;
the terminal equipment executes the TAU;
and the terminal equipment acquires the special bearer establishment request in the preset storage space after the TAU is completed, and establishes the voice special bearer according to the special bearer establishment request.
In a possible implementation manner, before the TAU is completed, the establishing, by the terminal device, a voice-specific bearer according to the specific bearer establishment request includes:
the terminal equipment executes the TAU in parallel and establishes a voice special bearer according to the special bearer establishment request; or,
and the terminal equipment establishes a voice special bearer according to the special bearer establishment request and executes the TAU after the voice special bearer is established.
In a possible implementation manner, in the TAU procedure, the receiving, by the terminal device, the dedicated bearer establishment request sent by the network device through the second network includes:
the terminal equipment sends a TAU request message to the network equipment;
and before the terminal equipment sends the TAU completion message to the network equipment, the terminal equipment receives a special bearer establishment request sent by the network equipment through a second network.
In one possible embodiment, the method further comprises:
after the TAU is completed and the establishment of the voice special bearer is completed, the terminal device performs voice service in the second network through the voice special bearer.
In a possible implementation manner, the first network is a new air interface NR network, and the second network is a long term evolution LTE network.
In a second aspect, an embodiment of the present application provides a communication apparatus, including: a receiving module and a processing module, wherein,
the receiving module is configured to receive, by a terminal device, a dedicated bearer establishment request sent by a network device through a second network in a tracking area update TAU procedure, where the TAU procedure is used for the terminal device to fall back from a first network to the second network;
the processing module is configured to establish a voice dedicated bearer according to the dedicated bearer establishment request, where the voice dedicated bearer is used for performing a voice service in the second network by the terminal device.
In one possible embodiment, the apparatus further comprises a sending module, wherein,
the sending module is configured to send a dedicated bearer accept message to the network device according to the dedicated bearer establishment request, where the dedicated bearer accept message is used to complete establishment of the voice dedicated bearer.
In a possible implementation, the processing module is specifically configured to:
after the TAU is completed, establishing a voice special bearer according to the special bearer establishment request; or,
and before the TAU is completed, establishing a voice special bearer according to the special bearer establishment request.
In a possible implementation, the processing module is specifically configured to:
storing the special bearing establishment request in a preset storage space;
executing the TAU;
and after the TAU is completed, acquiring the special bearer establishment request in the preset storage space, and establishing a voice special bearer according to the special bearer establishment request.
In a possible implementation, the processing module is specifically configured to:
executing the TAU in parallel and establishing a voice special bearer according to the special bearer establishing request; or,
and establishing a voice special bearer according to the special bearer establishment request, and executing the TAU after the voice special bearer is established.
In a possible implementation manner, the sending module is further configured to send a TAU request message to the network device;
the receiving module is further configured to receive, through the second network, a dedicated bearer establishment request sent by the network device before the sending module sends the TAU complete message to the network device.
In a possible implementation, the processing module is further configured to:
and after the TAU is completed and the voice special bearing is established, performing voice service in the second network through the voice special bearing.
In a possible implementation manner, the first network is a new air interface NR network, and the second network is a long term evolution LTE network.
In a third aspect, an embodiment of the present application provides a terminal device, including: a transceiver, a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory, causing the processor to perform the communication method of any of the first aspects.
In a fourth aspect, the present application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is configured to implement the communication method according to any one of the first aspect.
In a fifth aspect, the present application provides a computer program product, which can be executed by a processor, and when the computer program product is executed, the above communication method can be implemented.
According to the communication method, the communication device and the communication equipment provided by the embodiment of the application, when the terminal equipment is located in the first network, if the terminal equipment has a voice call requirement, the network equipment can control the terminal equipment to fall back to the second network, and the voice call is carried out in an EPS falling back mode. In the process that the terminal equipment falls back from the first network to the second network, the terminal equipment needs to perform a TAU flow, if the terminal equipment receives a special bearer establishment request sent by the network equipment in the TAU flow, the terminal equipment establishes a voice special bearer according to the special bearer establishment request, and therefore after the terminal equipment is switched to the second network, voice service can be performed according to the voice special bearer, the probability of call-through of a telephone is improved, and further the reliability of communication is improved.
Drawings
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present application;
fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application;
fig. 3 is a schematic flowchart of another communication method according to an embodiment of the present application;
fig. 4 is a flowchart illustrating another communication method according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of another communication device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
Detailed Description
For ease of understanding, the concepts related to the embodiments of the present application will be explained first.
The terminal equipment: the device has a wireless transceiving function. The terminal equipment can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; can also be deployed on the water surface (such as a ship and the like); and may also be deployed in the air (e.g., airplanes, balloons, satellites, etc.). The terminal device may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a vehicle-mounted terminal device, a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a wearable terminal device, and the like. The terminal device according to the embodiment of the present application may also be referred to as a terminal, a User Equipment (UE), an access terminal device, a vehicle-mounted terminal, an industrial control terminal, a UE unit, a UE station, a mobile station, a remote terminal device, a mobile device, a UE terminal device, a wireless communication device, a UE agent, or a UE apparatus. The terminal equipment may also be fixed or mobile.
A network device: the network device refers to a core network device, for example, the network device may be a Mobility Management Entity (MME).
Next, a system architecture to which the embodiment of the present application is applied will be described with reference to fig. 1.
Fig. 1 is a schematic diagram of a system architecture according to an embodiment of the present disclosure. Referring to fig. 1, terminal apparatus 101, base station 102, and base station 103 are included. Base station 102 may provide terminal device 101 with an NR network and base station 103 may provide terminal device 101 with an LTE network.
When the terminal device 101 is located in the NR network, if the terminal device 101 has a requirement for voice call, the terminal device 101 may fall back from the NR network to the LTE network to perform voice call.
In the related art, in the process that the terminal device falls back from the NR network to the LTE network, the terminal device needs to perform TAU, and in the TAU flow, the terminal device cannot create a dedicated voice bearer in the LTE network, so that voice call fails, and thus communication reliability is poor.
In order to solve the technical problem, an embodiment of the present application provides a communication method, so that even in a TAU procedure, a voice-only bearer can be established in an LTE network, and thus a voice call can be performed in the LTE network, and reliability of communication is improved.
The technical means shown in the present application will be described in detail below with reference to specific examples. It should be noted that the following embodiments may exist alone or in combination with each other, and description of the same or similar contents is not repeated in different embodiments.
Fig. 2 is a flowchart illustrating a communication method according to an embodiment of the present application. Referring to fig. 2, the method may include:
s201, in the TAU process, the network equipment sends a special bearer establishment request to the terminal equipment through a second network.
At the present moment, the terminal device is located in the first network. The first network may be an NR network and the second network may be an LTE network.
The terminal device is currently located in a first network, when the terminal device has a voice call requirement, the terminal device may send a voice call request to the network device, and if the network device desires that the terminal device performs a voice call in an Evolved Packet System (EPS) fallback (fallback) manner, the network device may control the terminal device to perform inter-system handover or execute a redirection procedure, so that the terminal device is switched from the first network to a second network. The network device may refer to
In the process of switching the terminal device from the first network to the second network, the terminal device needs to perform a TAU procedure, and the TAU procedure is used for enabling the terminal device to fall back from the first network to the second network. The TAU process at least comprises the following steps: the terminal equipment sends a TAU request message to the network equipment, the network equipment sends a TAU response message to the terminal equipment, and the terminal equipment sends a TAU completion message to the network equipment. In the TAU flow, the first step in the TAU flow is already started, and the last step in the TAU flow is not completed.
Because the network device expects the terminal device to perform voice call in an EPS fallback manner, the network device may send a dedicated bearer establishment request to the terminal device through the second network, where the dedicated bearer establishment request is used to request establishment of a voice dedicated bearer in the second network, and the voice dedicated bearer is used to enable the terminal device to perform voice service in the second network.
S202, the terminal equipment establishes the voice special bearer according to the special bearer establishing request.
In the relevant protocol, it is specified that the terminal device does not process an EPS Session Management (ESM) message in the TAU flow. For example, the current protocol is specified as follows: in addition to the attach procedure and the service request procedure, the MME shall suspend the transmission of the ESM messages during EPS Mobility Management (EMM). The MME may suspend transmission of the ESM message during the service request.
Therefore, in the related art, after the terminal device receives the dedicated bearer establishment request in the TAU procedure, the terminal device discards the dedicated bearer establishment request, thereby causing a failure in establishing the voice dedicated bearer.
In the embodiment of the present application, after the terminal device receives the dedicated bearer establishment request, even if the terminal device is in the TAU procedure, the terminal device still processes the dedicated bearer establishment request, and then successfully establishes the voice dedicated bearer, so that after the TAU procedure is ended, the terminal device can be switched to the second network, and perform a voice service in the second network according to the voice dedicated bearer. And the terminal equipment sends a special bearing receiving message to the network equipment according to the special bearing establishing request so as to complete the establishment of the voice special bearing. The dedicated bearer accept message may be an activate dedicated EPS bearer context accept (activated dedicated EPS bearer context accept) message.
Before the terminal device performs the voice service, the terminal device needs to complete the TAU procedure and establish the dedicated voice bearer, and the terminal device can complete the TAU procedure and establish the dedicated voice bearer in the following two ways:
the first mode is as follows: and after the TAU is completed, the terminal equipment establishes the voice special bearer according to the special bearer establishment request.
In this manner, after receiving the dedicated bearer establishment request, the terminal device stores the dedicated bearer establishment request in a preset storage space, continues to perform the TAU, and after the TAU is completed, the terminal device obtains the dedicated bearer establishment request in the preset storage space and establishes the voice dedicated bearer according to the dedicated bearer establishment request.
In this kind of mode, after TAU accomplished, terminal equipment reestablished the special bearing of pronunciation, like this, can avoid the special bearing of pronunciation to the influence of TAU flow for terminal equipment can accomplish the TAU flow fast, so that terminal equipment can switch over to LTE network fast, and then make terminal equipment after having established the special bearing of pronunciation, can be very fast carry out voice service, reduce user's latency, and then improve user's conversation and experience.
The second mode is as follows: and before the TAU is completed, the terminal equipment establishes the voice special bearer according to the special bearer establishment request.
Optionally, the terminal device may execute the TAU in parallel and establish the voice dedicated bearer according to the dedicated bearer establishment request.
In the mode, the TAU is executed in parallel, the voice special bearer is established according to the special bearer establishment request, the terminal equipment can quickly complete establishment of the TAU and the voice special bearer, and then voice service can be quickly carried out on the terminal equipment, waiting time of a user is shortened, and conversation experience of the user is improved.
Optionally, the terminal device may establish the voice dedicated bearer according to the dedicated bearer establishment request, and execute the TAU after the establishment of the voice dedicated bearer is completed.
According to the communication method provided by the embodiment of the application, when the terminal equipment is located in the first network, if the terminal equipment has a voice call requirement, the network equipment can control the terminal equipment to fall back to the second network, and the voice call is carried out in an EPS falling back mode. In the process that the terminal equipment falls back from the first network to the second network, the terminal equipment needs to perform a TAU flow, if the terminal equipment receives a special bearer establishment request sent by the network equipment in the TAU flow, the terminal equipment establishes a voice special bearer according to the special bearer establishment request, and therefore after the terminal equipment is switched to the second network, voice service can be performed according to the voice special bearer, the probability of call-through of a telephone is improved, and further the reliability of communication is improved.
On the basis of any of the above embodiments, after the terminal device receives the dedicated bearer establishment request in the TAU procedure, the terminal device may establish the voice dedicated bearer after the TAU is completed, or the terminal device may establish the voice dedicated bearer before the TAU is completed. The communication process is described in detail below with the embodiments shown in fig. 3 to 4, taking the first network as an NR network and the second network as an LTE network as an example.
Fig. 3 is a flowchart illustrating another communication method according to an embodiment of the present application. In the embodiment shown in fig. 3, the terminal device re-establishes the voice-specific bearer after the TAU is completed. Referring to fig. 3, the method may include:
s301, the terminal device sends an internet protocol multimedia subsystem (IMS) signaling to the network device.
At the present time, the terminal device is located in the NR network.
After the terminal equipment has the telephone requirement, the terminal equipment sends IMS signaling to the network equipment to request to carry out voice call.
The terminal device is provided with a modem (modem) and an Application Processor (AP), when a user needs to make a call through the terminal device, the user may perform an operation (e.g., input a phone number and make a call) on a dialing interface of the terminal device, and after receiving the operation input by the user at the terminal device, the AP sends an instruction to the modem, so that the terminal device sends an IMS signaling to the network device through the modem.
S302, the network equipment sends a first message to the terminal equipment.
The network device expects the terminal device to perform voice call in an EPS fallback mode, and then the network device sends a first message to the terminal device.
The first message is used to instruct the terminal device to switch from the NR network to the LTE network. The first message may be at least one of: a connection state switch message or a release message.
The connection state handover message is used to enable the terminal device to perform a Packet Service Handover (PSHO) procedure, for example, the connection state handover message may be a Mobility From NR Command (m) From the NR network.
The release message is used to cause the terminal device to execute a redirection procedure.
S303, the terminal equipment sends the TAU request message to the network equipment according to the first message.
It should be noted that, after the terminal device sends the TAU request message to the network device, the TAU procedure starts. Before the terminal equipment sends the TAU complete message to the network equipment, the terminal equipment is in the TAU flow.
S304, the network equipment sends a special bearer establishment request to the terminal equipment through the LTE network.
S305, the terminal device stores the special bearer establishment request in a preset storage space.
For example, the predetermined storage space may be a predetermined cache.
S306, the network equipment sends a TAU response message to the terminal equipment according to the TAU request message.
Optionally, the network device may send a dedicated bearer establishment request to the terminal device after sending the TAU response message to the terminal device. That is, S306 may be executed first, and then S304-S305 may be executed.
And S307, the terminal equipment sends a TAU completion message to the network equipment according to the TAU response message.
It should be noted that, through the steps shown in S303 and S306-S307, the TAU is completed, and after the TAU is completed, the terminal device may access the LTE network.
S308, the terminal equipment acquires the special bearing establishment request in a preset storage space.
S309, the terminal device sends a context receiving message for activating the special EPS bearer to the network device according to the special bearer establishment request.
And S310, the terminal equipment performs voice service.
In the embodiment shown in fig. 3, when the terminal device is located in the NR network, if the terminal device has a voice call requirement, the network device may control the terminal device to fall back to the LTE network, and perform a voice call in an EPS fall back manner. In the process that the terminal equipment falls back to the LTE network from the NR network, the terminal equipment needs to perform a TAU flow, if the terminal equipment receives a special bearer establishment request sent by the network equipment in the TAU flow, the terminal equipment can store the special bearer establishment request to a preset storage space and continue to perform the TAU flow, after the TAU is completed, the terminal equipment can acquire the special bearer establishment request from the preset storage space and establish a voice special bearer according to the special bearer establishment request, after the TAU is completed, the terminal equipment can access the LTE network and perform voice service according to the voice special bearer, the probability of call-through is improved, and further the reliability of communication is improved.
Fig. 4 is a flowchart illustrating another communication method according to an embodiment of the present application. In the embodiment shown in fig. 4, the terminal device re-establishes the voice-specific bearer after the TAU is completed. Referring to fig. 4, the method may include:
s401, the terminal device sends an internet protocol multimedia subsystem (IMS) signaling to the network device.
S402, the network equipment sends a first message to the terminal equipment.
The first message is used to instruct the terminal device to switch from the NR network to the LTE network.
S403, the terminal device sends a TAU request message to the network device according to the first message.
It should be noted that, after the terminal device sends the TAU request message to the network device, the TAU procedure starts. Before the terminal equipment sends the TAU complete message to the network equipment, the terminal equipment is in the TAU flow.
S404, the network equipment sends a special bearing establishment request to the terminal equipment through the LTE network.
It should be noted that the execution processes of S401 to S404 may refer to the execution processes of S301 to S304, and are not described herein again.
S405, the terminal equipment sends an acceptance message for activating the special EPS bearing context to the network equipment according to the special bearing establishment request.
S406, the network device sends a TAU response message to the terminal device according to the TAU request message.
Optionally, the network device may send a dedicated bearer establishment request to the terminal device after sending the TAU response message to the terminal device. That is, S406 may be executed first, and then S404 to S405 may be executed.
S407, the terminal device sends a TAU completion message to the network device according to the TAU response message.
It should be noted that, through the steps shown in S403 and S406-S407, the TAU is completed, and after the TAU is completed, the terminal device may access the LTE network.
It should be noted that S405 and S406-S407 may be executed in parallel or sequentially. For example, the terminal device may execute S405 and S406-S407 simultaneously, or may execute S405 first, and then execute S406-S407 after executing S405.
And S408, the terminal equipment performs voice service.
In the embodiment shown in fig. 4, when the terminal device is located in the NR network, if the terminal device has a voice call requirement, the network device may control the terminal device to fall back to the LTE network, and perform a voice call in an EPS fall back manner. In the process that the terminal equipment falls back to the LTE network from the NR network, the terminal equipment needs to perform a TAU flow, if the terminal equipment receives a special bearer establishment request sent by the network equipment in the TAU flow, the terminal equipment can establish a voice special bearer according to the special bearer establishment request and continue to execute the TAU, and after the TAU is completed, the terminal equipment can access the LTE network and perform voice service according to the voice special bearer, so that the probability of call through is improved, and the reliability of communication is further improved.
Fig. 5 is a schematic structural diagram of a communication device according to an embodiment of the present application. The communication apparatus 10 may be provided in a terminal device. Referring to fig. 5, the communication device 10 may include: a receiving module 11 and a processing module 12, wherein,
the receiving module 11 is configured to, in a tracking area update TAU procedure, receive, by a terminal device, a dedicated bearer establishment request sent by a network device through a second network, where the TAU procedure is used for the terminal device to fall back from a first network to the second network;
the processing module 12 is configured to establish a voice dedicated bearer according to the dedicated bearer establishment request, where the voice dedicated bearer is used for the terminal device to perform a voice service in the second network.
The communication device shown in the embodiment of the present application may execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects thereof are similar, and are not described herein again.
Fig. 6 is a schematic structural diagram of another communication device according to an embodiment of the present application. In addition to the embodiment shown in fig. 5, please refer to fig. 6, the communication device 10 further includes a sending module 13, wherein,
the sending module 13 is configured to send a dedicated bearer accept message to the network device according to the dedicated bearer establishment request, where the dedicated bearer accept message is used to complete establishment of the voice dedicated bearer.
In a possible implementation, the processing module 12 is specifically configured to:
after the TAU is completed, establishing a voice special bearer according to the special bearer establishment request; or,
and before the TAU is completed, establishing a voice special bearer according to the special bearer establishment request.
In a possible implementation, the processing module 12 is specifically configured to:
storing the special bearing establishment request in a preset storage space;
executing the TAU;
and after the TAU is completed, acquiring the special bearer establishment request in the preset storage space, and establishing a voice special bearer according to the special bearer establishment request.
In a possible implementation, the processing module 12 is specifically configured to:
executing the TAU in parallel and establishing a voice special bearer according to the special bearer establishing request; or,
and establishing a voice special bearer according to the special bearer establishment request, and executing the TAU after the voice special bearer is established.
In a possible implementation manner, the sending module 13 is further configured to send a TAU request message to the network device;
the receiving module 11 is further configured to receive, through the second network, a dedicated bearer establishment request sent by the network device before the sending module 13 sends the TAU complete message to the network device.
In a possible implementation, the processing module 12 is further configured to:
and after the TAU is completed and the voice special bearing is established, performing voice service in the second network through the voice special bearing.
In a possible implementation manner, the first network is a new air interface NR network, and the second network is a long term evolution LTE network.
The communication device shown in the embodiment of the present application may execute the technical solutions shown in the above method embodiments, and the implementation principles and beneficial effects thereof are similar, and are not described herein again.
Fig. 7 is a schematic structural diagram of a terminal device according to an embodiment of the present application. Referring to fig. 7, the terminal device 20 may include: a transceiver 21, a memory 22, a processor 23. The transceiver 21 may include: a transmitter and/or a receiver. The transmitter may also be referred to as a sender, a transmitter, a sending port or a sending interface, and the like, and the receiver may also be referred to as a receiver, a receiving port or a receiving interface, and the like. Illustratively, the transceiver 21, the memory 22, and the processor 23 are connected to each other by a bus 24.
The memory 22 is used for storing program instructions;
processor 23 is operative to execute program instructions stored by the memory to cause terminal device 20 to perform any of the illustrated communication methods described above.
The terminal device shown in the embodiment of fig. 7 may execute the technical solution shown in the above method embodiment, and the implementation principle and the beneficial effect are similar, which are not described herein again.
The embodiment of the application provides a computer-readable storage medium, in which computer-executable instructions are stored, and when the computer-executable instructions are executed by a processor, the computer-readable storage medium is used for implementing the communication method.
Embodiments of the present application may also provide a computer program product, which can be executed by a processor, and when the computer program product is executed, the above-mentioned communication method can be implemented.
All or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The aforementioned program may be stored in a readable memory. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned memory (storage medium) includes: read-only memory (ROM), RAM, flash memory, hard disk, solid state disk, magnetic tape (magnetic tape), floppy disk (flexible disk), optical disk (optical disk), and any combination thereof.
Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to encompass such modifications and variations.
In the present application, the terms "include" and variations thereof may refer to non-limiting inclusions; the term "or" and variations thereof may mean "and/or". The terms "first," "second," and the like in this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. In the present application, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Claims (18)

1. A method of communication, comprising:
in a tracking area update TAU flow, a terminal device receives a special bearer establishment request sent by a network device through a second network, wherein the TAU flow is used for the terminal device to fall back to the second network from a first network;
and the terminal equipment establishes a voice special bearer according to the special bearer establishing request, wherein the voice special bearer is used for voice service of the terminal equipment in the second network.
2. The method of claim 1, wherein the terminal device establishes the voice-specific bearer according to the specific bearer establishment request, and wherein the method comprises:
and the terminal equipment sends a special bearing receiving message to the network equipment according to the special bearing establishing request, wherein the special bearing receiving message is used for finishing establishing the voice special bearing.
3. The method of claim 1, wherein the terminal device establishes the voice-specific bearer according to the specific bearer establishment request, and wherein the method comprises:
after the TAU is completed, the terminal equipment establishes a voice special bearer according to the special bearer establishment request; or,
and before the TAU is completed, the terminal equipment establishes the voice special bearer according to the special bearer establishment request.
4. The method of claim 3, wherein after the TAU is completed, the terminal device establishes a voice-specific bearer according to the specific bearer establishment request, and wherein the method comprises:
the terminal equipment stores the special bearing establishment request in a preset storage space;
the terminal equipment executes the TAU;
and the terminal equipment acquires the special bearer establishment request in the preset storage space after the TAU is completed, and establishes the voice special bearer according to the special bearer establishment request.
5. The method of claim 3, wherein before the TAU is completed, the terminal device establishes a voice-specific bearer according to the specific bearer establishment request, comprising:
the terminal equipment executes the TAU in parallel and establishes a voice special bearer according to the special bearer establishment request; or,
and the terminal equipment establishes a voice special bearer according to the special bearer establishment request and executes the TAU after the voice special bearer is established.
6. The method according to any of claims 1-5, wherein in the TAU procedure, the receiving, by the terminal device, the dedicated bearer establishment request sent by the network device through the second network includes:
the terminal equipment sends a TAU request message to the network equipment;
and before the terminal equipment sends the TAU completion message to the network equipment, the terminal equipment receives a special bearer establishment request sent by the network equipment through a second network.
7. The method according to any one of claims 1-5, further comprising:
after the TAU is completed and the establishment of the voice special bearer is completed, the terminal device performs voice service in the second network through the voice special bearer.
8. The method according to any of claims 1-5, wherein the first network is a new air interface, NR, network and the second network is a Long term evolution, LTE, network.
9. A communications apparatus, comprising: a receiving module and a processing module, wherein,
the receiving module is configured to receive, by a terminal device, a dedicated bearer establishment request sent by a network device through a second network in a tracking area update TAU procedure, where the TAU procedure is used for the terminal device to fall back from a first network to the second network;
the processing module is configured to establish a voice dedicated bearer according to the dedicated bearer establishment request, where the voice dedicated bearer is used for performing a voice service in the second network by the terminal device.
10. The apparatus of claim 9, further comprising a transmitting module, wherein,
the sending module is configured to send a dedicated bearer accept message to the network device according to the dedicated bearer establishment request, where the dedicated bearer accept message is used to complete establishment of the voice dedicated bearer.
11. The apparatus of claim 10, wherein the processing module is specifically configured to:
after the TAU is completed, establishing a voice special bearer according to the special bearer establishment request; or,
and before the TAU is completed, establishing a voice special bearer according to the special bearer establishment request.
12. The apparatus of claim 11, wherein the processing module is specifically configured to:
storing the special bearing establishment request in a preset storage space;
executing the TAU;
and after the TAU is completed, acquiring the special bearer establishment request in the preset storage space, and establishing a voice special bearer according to the special bearer establishment request.
13. The apparatus of claim 11, wherein the processing module is specifically configured to:
executing the TAU in parallel and establishing a voice special bearer according to the special bearer establishing request; or,
and establishing a voice special bearer according to the special bearer establishment request, and executing the TAU after the voice special bearer is established.
14. The apparatus according to any one of claims 10 to 13,
the sending module is further configured to send a TAU request message to the network device;
the receiving module is further configured to receive, through the second network, a dedicated bearer establishment request sent by the network device before the sending module sends the TAU complete message to the network device.
15. The apparatus of any of claims 9-13, wherein the processing module is further configured to:
and after the TAU is completed and the voice special bearing is established, performing voice service in the second network through the voice special bearing.
16. The apparatus according to any of claims 9-13, wherein the first network is a new air interface, NR, network and the second network is a long term evolution, LTE, network.
17. A terminal device, comprising: a transceiver, a processor, a memory;
the memory stores computer-executable instructions;
the processor executes computer-executable instructions stored by the memory, causing the processor to perform the communication method of any of claims 1 to 8.
18. A computer-readable storage medium having stored thereon computer-executable instructions for implementing the communication method of any one of claims 1 to 8 when executed by a processor.
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