CN111869265B - Network communication method and device and network equipment - Google Patents

Abstract

The embodiment of the application provides a network communication method, a device and a network device, comprising the following steps: under the condition that a terminal accesses a second network from a first network, an access network element of the second network receives a first bearer or data stream establishment/modification request message sent by a first core network element; and the access network element of the second network triggers the terminal to return to the first network based on a target event.

Description

A network communication method and device, and network equipment

technical field

The embodiments of the present application relate to the field of mobile communication technologies, and in particular, to a network communication method and apparatus, and network equipment.

Background technique

The fifth generation (5G, 5th ^Generation ) mobile communication system is also called the New Radio (NR, New Radio) system. In the early stage of 5G network deployment or in the case of 5G network congestion, the 5G network may not be able to support voice on NR ( VoNR, Voice over New Radio), the 5G network needs to trigger the handover process or redirection process from the 5G network to the fourth generation (4G, 4 ^th Generation) network, through the long-term evolution of the 4G network (VoLTE, Voice over Long TermEvolution) to complete the voice service of the terminal.

At present, after the terminal completes the VoLTE voice service, there is no mechanism to trigger the terminal to quickly return to the 5G network for the terminal that is specifically for the purpose of establishing the voice service to fall back from 5G to 4G.

SUMMARY OF THE INVENTION

Embodiments of the present application provide a network communication method, device, and terminal.

The network communication method provided by the embodiment of the present application includes:

When the terminal accesses the second network from the first network, the access network element of the second network receives the first bearer or data stream establishment/modification request message sent by the first core network element;

The access network element of the second network triggers the terminal to return to the first network based on the target event.

The network communication device provided by the embodiment of the present application includes:

a receiving unit, configured to receive a first bearer or a data stream establishment/modification request message sent by the network element of the first core network when the terminal accesses the second network from the first network;

A triggering unit, configured to trigger the terminal to return to the first network based on a target event.

The network device provided by the embodiments of the present application includes a processor and a memory. The memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the above-mentioned network communication method.

The chip provided by the embodiment of the present application is used to implement the above-mentioned network communication method.

Specifically, the chip includes: a processor for calling and running a computer program from the memory, so that the device installed with the chip executes the above-mentioned network communication method.

The computer-readable storage medium provided by the embodiment of the present application is used to store a computer program, and the computer program enables a computer to execute the above-mentioned network communication method.

The computer program product provided by the embodiments of the present application includes computer program instructions, and the computer program instructions cause a computer to execute the above-mentioned network communication method.

The computer program provided by the embodiment of the present application, when it runs on the computer, causes the computer to execute the above-mentioned network communication method.

Through the above technical solutions, the terminal falls back from the 5G network to the 4G network to perform specific services (such as voice services), and can quickly return to the 5G network after the specific service ends, so that the terminal can use the 5G network to the greatest extent. network experience. The technical solutions of the embodiments of the present application realize the fast network return function without affecting the MME, and have little impact on the 5G system and the 4G system, which is easy to implement.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

FIG. 1 is a schematic diagram of a communication system architecture provided by an embodiment of the present application;

FIG. 2 is a system architecture diagram of a 5G network according to an embodiment of the application;

3 is a system architecture diagram of a 4G network according to an embodiment of the application;

4 is a schematic diagram of a handover (HO, Handover) process according to an embodiment of the present application;

FIG. 5( a ) is a schematic flowchart 1 of a network fallback according to an embodiment of the present application;

FIG. 5(b) is a second schematic flowchart of a network fallback according to an embodiment of the present application;

Figure 6(a) is a flowchart of triggering the establishment of dedicated bearer QCI=1 on EPC;

Fig. 6(b) is the flow chart of triggering the establishment of proprietary data stream 5QI=1 on 5GC;

7 is a schematic flowchart of a network communication method provided by an embodiment of the present application;

Figure 8(a) is a schematic flowchart of EPS Fallback;

Figure 8(b) is a schematic flow chart of RAT Fallback;

FIG. 9 is a schematic structural composition diagram of a network communication device provided by an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 11 is a schematic structural diagram of a chip according to an embodiment of the present application;

FIG. 12 is a schematic block diagram of a communication system provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

The technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a Global System of Mobile communication (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (Wideband) system Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (Long Term Evolution, LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (Time Division Duplex, TDD), Universal Mobile Telecommunication System (Universal Mobile Telecommunication System, UMTS), Worldwide Interoperability for Microwave Access (Worldwide Interoperability for Microwave Access, WiMAX) communication system or 5G system, etc.

Exemplarily, a communication system 100 to which this embodiment of the present application is applied is shown in FIG. 1 . The communication system 100 may include a network device 110, and the network device 110 may be a device that communicates with a terminal 120 (or referred to as a communication terminal, a terminal). The network device 110 may provide communication coverage for a particular geographic area and may communicate with terminals located within the coverage area. Optionally, the network device 110 may be a base station (Base TransceiverStation, BTS) in a GSM system or a CDMA system, a base station (NodeB, NB) in a WCDMA system, or an evolved base station ( Evolutional Node B, eNB or eNodeB), or a wireless controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network equipment can be a mobile switching center, relay station, access point, in-vehicle equipment, wearable Devices, hubs, switches, bridges, routers, network-side devices in 5G networks, or network devices in the future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN), etc.

The communication system 100 also includes at least one terminal 120 located within the coverage of the network device 110 . "Terminal" as used herein includes, but is not limited to, connections via wired lines, such as via Public Switched Telephone Networks (PSTN), Digital Subscriber Line (DSL), digital cable, direct cable connections; and /or another data connection/network; and/or via a wireless interface, eg, for cellular networks, Wireless Local Area Networks (WLANs), digital television networks such as DVB-H networks, satellite networks, AM-FM radio A transmitter; and/or a device of another terminal configured to receive/transmit a communication signal; and/or an Internet of Things (IoT) device. A terminal arranged to communicate through a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radio telephones with data processing, facsimile, and data communications capabilities; may include radio telephones, pagers, Internet/Intranet PDAs with networking access, web browser, memo pad, calendar, and/or Global Positioning System (GPS) receiver; and conventional laptop and/or palm receivers or others including radiotelephone transceivers electronic device. A terminal may refer to an access terminal, user equipment (UE), subscriber unit, subscriber station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a wireless communication function handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminals in 5G networks, or terminals in future evolved PLMNs, etc.

Optionally, direct terminal (Device to Device, D2D) communication may be performed between the terminals 120 .

Optionally, a 5G system or a 5G network may also be referred to as a New Radio (New Radio, NR) system or an NR network.

FIG. 1 exemplarily shows one network device and two terminals. Optionally, the communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of terminals. This embodiment of the present application This is not limited.

Optionally, the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that, in the embodiments of the present application, a device having a communication function in the network/system may be referred to as a communication device. Taking the communication system 100 shown in FIG. 1 as an example, the communication device may include a network device 110 and a terminal 120 with a communication function, and the network device 110 and the terminal 120 may be the specific devices described above, which will not be repeated here; The device may further include other devices in the communication system 100, such as other network entities such as a network controller and a mobility management entity, which are not limited in this embodiment of the present application.

It should be understood that the terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship.

FIG. 2 is a system architecture diagram of a 5G network according to an embodiment of the application. As shown in FIG. 2 , the devices involved in the 5G network system include:

Terminal (UE, User Equipment), Radio Access Network (RAN, Radio Access Network), User Plane Function (UPF, User Plane Function), Data Network (DN, Data Network), receiving core access and mobility management (AMF) , Core Access and Mobility Management Function), session management function (SMF, SessionManagement Function), policy control function (PCF, Policy Control function), application function (AF, Application Function), authentication server function (AUSF, Authentication Server Function) , Unified Data Management (UDM, Unified Data Management).

FIG. 3 is a system architecture diagram of a 4G network according to an embodiment of the application. As shown in FIG. 3 , the devices involved in the 4G network system include:

Terminal (UE, User Equipment), Evolved Universal Terrestrial Radio Access Network (E-UTRAN, Evolved Universal Terrestrial Radio Access Network), Mobility Management Function (MME, Mobility Management Entity) network element, Serving GPRS Support Node (SGSN, Serving GPRS Support Node) ), Home Subscriber Server (HSS, Home Subscriber Server), Serving Gateway (Serving Gateway), Packet Data Gateway (PDN Gateway, Packet Data Network Gateway), Policy and Charging Rules Function Unit (PCRF, Policy and Charging Rules Function) .

The above example in FIG. 2 and FIG. 3 is only an example of a network architecture for implementing the embodiment of the present application, and the embodiment of the present application is not limited to the network structure described in the above-mentioned FIG. 2 and FIG. 3 .

5G voice has been identified as VoIMS (VoNR), and the 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) defines the registration process and session establishment process. In order to facilitate the understanding of the technical solutions of the embodiments of this application, the following embodiments of this application The related technologies involved are described.

1. Registration and session establishment process

In the 5G network, the terminal needs to be registered on the 5G network before it can perform related 5G services. The 5G network registration process is different from the 4G network attachment process. The registration process in the 5G network does not include the session establishment process, that is to say, the session establishment process can not be executed when the terminal is registered. AMF will The networking (NSA, Non-Standalone) information) is sent to the SMF through the N11_Request message of the N11 interface, and the SMF decides whether to trigger the session establishment process.

The two processes of registration and session establishment are the most basic and most important processes of 5G mobility management (MM) and session management (SM). In this embodiment of the present application, the UE in the registration process adds a "voice support" identifier to the network, and reports it to the network. It is sent to the SMF through a NAS-SM message, and the "voice support" flag is added to the UDM, and sent to the SMF through a Subscription data response message in the session establishment process. For SMF to judge when 5G falls back to 4G.

FIG. 4 is a schematic diagram of a handover (HO, Handover) process according to an embodiment of the present application. The example of FIG. 4 describes a process of handover from a 5G network to a 4G network.

2. Voice fallback process

In the early stage of 5G network deployment or when the 5G network is congested, the 5G network may not support VoNR, and the 5G network needs to trigger the 5G→4G Handover process or redirection process (Figure 5(a) and 5(b) shown), let the 4G network perform VoLTE, so as to complete the UE's request for voice establishment. For the 5G->4G Handover process or Redirection process, there are the following three types:

1) Radio Access Handover (RAT Handover, Radio Access Technologies Handover)

That is, the 5G core network remains unchanged, the RAT fallback is triggered when the UE needs to perform voice, the RAT access is changed from NR to LTE, and then the VoLTE operation is performed.

2) Evolved Packet System Handover (EPS Handover, Evolved Packet System Handover)

That is, the 5G core network is switched to the 4G core network, and the RAT will also be changed from NR to LTE, and then the VoLTE operation will be performed.

3) RRC redirection (RRC Redirection)

The base station of the 5G network directly sends an RRC Connection Release (RRC Connection Release) message to the UE, and carries the cell information (Cell ID) and frequency (Frequency Band) information of the target network (such as a 4G network).

The above 1), 2), and 3) are all triggered by the RAN (ie NG-RAN) on the 5G network side.

During the fall from 5G network to 4G network, the following three situations will occur:

1) The 5G core network (5GC) remains unchanged, and the AMF does not change during the fallback of the RAT.

In this case, the NG-RAN will send a reject indication to the AMF in step 5b shown in FIG. 5(b), indicating that the reject is caused by the ongoing HO. After the HO is completed, the AMF is responsible for triggering the establishment of the QCI=1 bearer immediately.

2) The 5GC remains unchanged, and the AMF changes during the RAT fall.

In this case, the NG-RAN will send a reject indication to the AMF in step 5b shown in Figure 5(b), indicating that the reject is caused by the ongoing HO. When the AMF changes, the AMF will send a reject indication to the SMF, indicating that the 5QI=1 stream sent by the SMF just now has not been established successfully because the HO is in progress. After the HO is completed, the SMF is responsible for triggering the establishment of the QCI=1 bearer immediately.

3) The 5GC→4G core network (EPC) falls back, and the RAT is also switched from NR→LTE (ie EPS Fallback).

In this case, in the process of cross-system handover, SMF is a module jointly set up by SMF and PGW-C (generally called SMF+PGW-C). This module is responsible for triggering QCI=1 bearer immediately after the cross-system handover is completed. Establish.

3. Special load establishment process

The flow of triggering the establishment of dedicated bearer QCI=1 on EPC is shown in Figure 6(a), and the flow of triggering establishment of dedicated data stream 5QI=1 on 5GC is shown in Figure 6(b).

FIG. 7 is a schematic flowchart of a network communication method provided by an embodiment of the present application. As shown in FIG. 7 , the network communication method includes the following steps:

Step 701: When the terminal accesses the second network from the first network, the access network element of the second network receives the first bearer or data flow establishment/modification request message sent by the first core network element.

In the embodiments of the present application, the terminal may be any device capable of communicating with the network, such as a mobile phone, a notebook, a tablet computer, and a vehicle-mounted terminal.

In this embodiment of the present application, the first bearer or data stream establishment/modification request message may be: a first bearer establishment request message, or a first bearer modification request message, or a first data stream establishment request message, or a first Data stream modification request message.

In the embodiment of the present application, the first network is a 5G network, and the second network is a 4G network. It should be noted that the first network and the second network in the embodiments of the present application are not limited to this, and with the evolution of the network system, the first network and the second network may also be other types of networks , for example, the first network is an enhanced 5G (5G-A) network, and the second network is a 5G network.

In this embodiment of the present application, when the terminal needs to execute a specific service, the specific service needs to be executed under the second network, and the terminal will access the second network from the first network, which is also referred to as the terminal falling back from the first network to the second network. Second network. For example, when the terminal needs to perform voice service or video service, it will fall back from the 5G network to the 4G network.

Here, the fallback of the terminal from the 5G network to the 4G network includes the following two situations:

Case 1: EPS Fallback

In the case of EPS fallback, the first network and the second network correspond to different core networks and different access networks. When the terminal falls back from the first network EPS to the second network, both the access network and the core network change. For example, the access network changes from NG-RAN to E-UTRAN, and the core network changes from 5GC to EPC.

Scenario 1: RAT Fallback

In the case of RAT fallback, the core networks corresponding to the first network and the second network are the same, and the access networks are different. When the terminal falls back from the first network RAT to the second network, the access network changes, but the core network remains unchanged. For example, the access network changes from NR to LTE, and the core network remains unchanged at 5GC.

In this embodiment of the present application, the access network element of the second network receives the first bearer establishment request message sent by the first core network element, as shown in FIG. 6( a ). In FIG. 6( a ), the EPC Trigger the process of establishing the dedicated bearer QCI=1; the access network element of the second network receives the first data stream establishment request message sent by the first core network element, as shown in FIG. 6(b), in FIG. 6 In (b) is the flow that 5GC triggers the establishment of a dedicated data stream 5QI=1.

It should be noted that, in the case of EPS fallback, the first bearer in this embodiment of the present application may be, but is not limited to, a dedicated bearer QCI=1. In the case of RAT fallback, the first data stream in this embodiment of the present application may be, but is not limited to, the dedicated data stream 5QI=1. Any situation in which a dedicated bearer or a dedicated data stream is established for a specific service is applicable to the technical solution of this application.

In this embodiment of the present application, the terminal may access the second network from the first network through handover or redirection.

Step 702: An access network element of the second network triggers the terminal to return to the first network based on a target event.

In the embodiment of the present application, the access network element of the second network triggers the terminal to return to the first network based on a target event, which occurs after the first bearer or data stream is released. That is, after the first bearer or data stream is released, the access network element of the second network triggers the terminal to return to the first network based on the target event.

In this embodiment of the present application, the access network element of the second network triggers the terminal to return to the first network based on a target event, which may be implemented in the following manner:

Manner 1: The access network element of the second network triggers the terminal to return to the first network based on the first indication information; wherein the first indication information is included in the first bearer or data stream Build Request/Modify message. Further, the first indication information includes at least one of the following: fallback indication information corresponding to a specific service, an identifier of the first network, an identifier for initiating the establishment/modification of a first bearer or a data stream for a specific service, and first time information , the first time information is used to determine the moment when the terminal is triggered to return to the first network.

Here, the identifier of the first network may be, but not limited to, the PLMN ID of the first network. The identifier of the second network may be, but is not limited to, the PLMN ID of the second network.

It should be noted that after receiving the first indication information, the access network element of the second network may immediately trigger the terminal to return to the first network, or wait for a certain period of time to trigger the terminal to return to the first network. the first network, or wait for the occurrence of a specific event to trigger the terminal to return to the first network. For example: when the first indication information includes the target time value, the terminal starts timing after receiving the first indication information, and when the timing time reaches the target time value, triggers the terminal to return to the target time value. Describe the first network.

In an application example, when the terminal falls back from the 5G network to the 4G network, it needs to (re) initiate the establishment request message of the dedicated bearer QCI=1 to the target base station (eNodeB), where the establishment request message can carry the first Indication information, the first indication information includes fallback indication information corresponding to a specific service and/or an identifier of the first network and/or a target time value, and the first indication information is used to notify the target base station (eNodeB) of the current fallback The fallback for a specific service (eg, voice fallback or video fallback). Then the target base station (eNodeB) triggers the terminal to return to the original network (5G network) after the dedicated bearer QCI=1 is released.

Mode 2: The access network element of the second network receives the first bearer or data stream establishment/modification request message within the first time period after the terminal accesses, and triggers the terminal to return to the Describe the first network.

For example, when the terminal falls back from the 5G network to the 4G network, it needs to (re) initiate a dedicated bearer QCI=1 establishment request message to the target base station (eNodeB). After the terminal connects to the 4G base station (eNodeB), the eNodeB If the establishment request message of the dedicated bearer QCI=1 is received within a certain period of time (a timer can be set), then: after the dedicated bearer QCI=1 is released, the terminal is triggered to return to the original network (5G network).

In this embodiment of the present application, the first core network element that triggers the first bearer or data flow establishment/modification request message has the following two situations:

Scenario 1: In the case of EPS fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is the network element jointly set up by SMF and PGW-C; wherein, the situation of EPS fallback , both the access network and the core network have changed.

The EPS Fallback process is shown in Figure 8 (a), the dedicated data stream establishment request sent by the 5GC network element is rejected in step 4, and it will carry a reason value, which is used to indicate that the reason for the rejection is due to a specific service. Implementation, for example, the reason value can be expressed as: "mobility due to fallback for IMS voice is ongoing", then in step 7, the EPC network element will trigger the establishment of the dedicated bearer, add the first indication information in this message, It includes the fallback indication information corresponding to a specific service (such as voice) and/or the identifier of the first network and/or the identifier for initiating a dedicated bearer or dedicated data flow establishment for a specific service and/or a specific time value (up to time) Trigger return), the basis for sending the first indication information may be that a specific cause value has been received in the previous step. Then in step 8, a service-specific connection (eg, a voice connection) is established. After the specific service ends, the eNodeB triggers the terminal to return to the original network according to the previously received first indication information. Here, after the dedicated bearer or dedicated data stream corresponding to the specific service is released, it indicates that the specific service ends. In one example, the specific service is a voice service, and in another example, the specific service is a video service. In addition, the above-mentioned dedicated bearer is, for example, dedicated bearer QCI=1, and the dedicated data stream is, for example, dedicated data stream 5QI=1

In the case of EPS Fallback, the network element that triggers the re-establishment of the dedicated bearer QCI=1 is SMF+PGW-C (ie, the network element jointly set up by SMF and PGW-C). During the whole process, the MME can process messages from the PGW-C as usual. For example, referring to Figure 6(a), the PGW-C carries the first indication in steps 2 and 3. After receiving the message in step 3, the MME processes the obtained message according to the existing method and adds it to the message in step 4. Sent to the eNodeB.

Case 2: In the case of RAT falling back, the first core network element that triggers the first bearer or data flow establishment/modification request message is the AMF; The network remains unchanged.

The RAT Fallback process is shown in Figure 8(b), similar to EPS Fallback, the NG-RAN carries the first indication information to the base station in the step 6 message. In the case of RAT Fallback, the network element that triggers the re-establishment of the dedicated data flow 5QI=1 is the AMF. Referring to Figure 6(b), the AMF carries the first indication information to the NG-RAN base station in step 4 to establish a dedicated data stream, or the SMF carries the first indication information to the base station on the NG-RAN side in step 4 , the AMF processes according to the existing method, and sends a request for establishing a dedicated data flow to the access network.

Mode 3: When the network element of the access network receives the first bearer or data flow establishment/modification request message, if the first bearer or data flow establishment/modification request message carries the first indication information, the A piece of indication information to determine the target network to be accessed and/or the time to access the target network and/or the conditions for accessing the target network, wherein the first indication information may include at least one of the following:

1. The identity of the original network, such as the PLMN ID of the original network;

2. The identifier of the target network, such as the PLMN ID of the target network;

3. The identifier established for the first bearer or data stream initiated for a specific service;

4. Second time information, where the second time information is used to determine the moment of accessing the target network;

5. Conditions for accessing the target network.

Here, the original network refers to the original network currently accessed by the terminal, and the target network refers to the target network that the terminal needs to access.

Here, the condition for accessing the target network is, for example: when it is detected that the signal quality of the original network is lower than the first threshold and/or the signal quality of the target network is higher than the second threshold, the target network is accessed.

Further, the first indication information may be included in steps 2/3/4 of FIG. 6(a) in the EPS system, and included in steps 3/4 of FIG. 6(b) in the 5GS system.

In this embodiment of the present application, the network side triggers the terminal to return to the first network through the following return:

Manner 1: initiate a handover or redirection process to the terminal, and trigger the terminal to return to the first network through the handover or redirection.

For example: after the terminal completes the call, that is, after the eNodeB completes the release of the dedicated bearer QCI=1, the eNodeB initiates a handover or redirection process for the terminal, and connects the terminal back to 5GS, specifically, including LTE/5GC or NR/ 5GC.

Manner 2: Send an RRC release message to the terminal to release the RRC connection, so that the terminal reselects a cell of the first network.

For example: after the terminal completes the call and completes the release of the dedicated bearer QCI=1, the eNodeB or MME sends an RRC release message to the terminal to release the RRC connection, and then re-selects a cell in the 5G network. Here, the cell re-selection can be However, it is not limited to performing cell reselection through frequency point priority information, or the RRC connection release message includes information of the target access network, and the cell reselection is performed based on the information of the target access network.

In the embodiment of the present application, when the terminal executes a specific service (such as a voice service) under the second network, if the specific service does not end, the terminal is not triggered to return to the first network, and only after the specific service ends , the terminal will be triggered to return to the first network only after the first bearer or data stream release is released.

FIG. 9 is a schematic structural composition diagram of a network communication device provided by an embodiment of the present application. As shown in FIG. 9 , the network communication device includes:

A receiving unit 901, configured to receive a first bearer or a data stream establishment/modification request message sent by a first core network network element when the terminal accesses the second network from the first network;

Triggering unit 902, configured to trigger the terminal to return to the first network based on a target event.

In one embodiment, the triggering unit 902 is configured to trigger the terminal to return to the first network based on a target event after the first bearer or data stream is released.

In one embodiment, the triggering unit 902 is configured to trigger the terminal to return to the first network based on first indication information; wherein the first indication information is included in the first bearer or data stream. in the build/modify request message.

In one embodiment, the first indication information includes at least one of the following:

Fallback indication information corresponding to the specific service, the identifier of the first network, the identifier of the second network, the identifier for initiating the first bearer or data stream establishment for the specific service, and the target time value, where the target time value is used to determine The moment when the terminal is triggered to return to the first network.

In one embodiment, the specific service includes at least voice or video service.

In one embodiment, the triggering unit 902 is configured to receive the first bearer or data stream establishment/modification request message within a first time period after the terminal accesses, and trigger the terminal to return to the Describe the first network.

In one embodiment, the triggering unit 902 is configured to initiate a handover or redirection process to the terminal, and trigger the terminal to return to the first network through the handover or redirection.

In one embodiment, the triggering unit 902 is configured to send an RRC release message to the terminal to release the RRC connection, so that the terminal can reselect a cell of the first network.

In an embodiment, the terminal accessing the second network from the first network includes:

The terminal accesses from the first network to the second network through handover or redirection.

In an embodiment, in the case of EPS fallback, the first network and the second network correspond to different core networks and different access networks.

In an embodiment, in the case of RAT fallback, the core network corresponding to the first network and the second network are the same, and the access networks are different.

In an embodiment, in the case of EPS fallback, the first core network element that triggers the first bearer or the data flow establishment/modification request message is a joint network element of the SMF and the PGW-C.

In an embodiment, in the case of RAT fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is the AMF.

In one embodiment, the receiving unit 901 is configured to receive a first bearer or a data stream establishment/modification request message sent by a core network element; the apparatus further includes a determining unit (not shown in the figure), configured to If the first bearer or data flow establishment/modification request message carries the first indication information, determine the target network to access and/or the time to access the target network and/or the access target according to the first indication information network conditions. Wherein, the first indication information includes at least one of the following:

The identity of the original network, the identity of the target network, the identity that initiates the establishment of the first bearer or data flow for a specific service, and the second time information, where the second time information is used to determine the time of accessing the target network and the access target network conditions.

It should be understood by those skilled in the art that the relevant description of the network communication apparatus in the embodiment of the present application can be understood with reference to the relevant description of the network communication method in the embodiment of the present application.

FIG. 10 is a schematic structural diagram of a communication device 600 provided by an embodiment of the present application. The communication device may be a network device. The communication device 600 shown in FIG. 10 includes a processor 610, and the processor 610 may call and run a computer program from a memory to implement the methods in the embodiments of the present application.

Optionally, as shown in FIG. 10 , the communication device 600 may further include a memory 620 . The processor 610 may call and run a computer program from the memory 620 to implement the methods in the embodiments of the present application.

The memory 620 may be a separate device independent of the processor 610 , or may be integrated in the processor 610 .

Optionally, as shown in FIG. 10 , the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive other Information or data sent by a device.

Among them, the transceiver 630 may include a transmitter and a receiver. The transceiver 630 may further include antennas, and the number of the antennas may be one or more.

Optionally, the communication device 600 may specifically be the network device in this embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in each method in the embodiment of the present application. For the sake of brevity, details are not repeated here. .

Optionally, the communication device 600 may specifically be the mobile terminal/terminal of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal in each method of the embodiment of the present application. This will not be repeated here.

FIG. 11 is a schematic structural diagram of a chip according to an embodiment of the present application. The chip 700 shown in FIG. 11 includes a processor 710, and the processor 710 can call and run a computer program from a memory, so as to implement the method in this embodiment of the present application.

Optionally, as shown in FIG. 11 , the chip 700 may further include a memory 720 . The processor 710 may call and run a computer program from the memory 720 to implement the methods in the embodiments of the present application.

The memory 720 may be a separate device independent of the processor 710 , or may be integrated in the processor 710 .

Optionally, the chip 700 may further include an input interface 730 . The processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may acquire information or data sent by other devices or chips.

Optionally, the chip 700 may further include an output interface 740 . The processor 710 can control the output interface 740 to communicate with other devices or chips, and specifically, can output information or data to other devices or chips.

Optionally, the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in each method of the embodiment of the present application, which is not repeated here for brevity.

Optionally, the chip can be applied to the mobile terminal/terminal in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal in each method of the embodiments of the present application. Repeat.

It should be understood that the chip mentioned in the embodiments of the present application may also be referred to as a system-on-chip, a system-on-chip, a system-on-chip, or a system-on-a-chip, or the like.

FIG. 12 is a schematic block diagram of a communication system 900 provided by an embodiment of the present application. As shown in FIG. 12 , the communication system 900 includes a terminal 910 and a network device 920 .

The terminal 910 can be used to implement the corresponding functions implemented by the terminal in the above method, and the network device 920 can be used to implement the corresponding functions implemented by the network device in the above method. For brevity, details are not repeated here.

It should be understood that the processor in this embodiment of the present application may be an integrated circuit chip, which has a signal processing capability. In the implementation process, each step of the above method embodiments may be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software. The above-mentioned processor may be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other programmable Logic devices, discrete gate or transistor logic devices, discrete hardware components. The methods, steps, and logic block diagrams disclosed in the embodiments of this application can be implemented or executed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the methods disclosed in conjunction with the embodiments of the present application may be directly embodied as executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software module may be located in random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, registers and other storage media mature in the art. The storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.

It can be understood that the memory in this embodiment of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. Wherein, the non-volatile memory may be Read-Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable PROM, EPROM), Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synchlink DRAM, SLDRAM) And direct memory bus random access memory (DirectRambus RAM, DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but not be limited to, these and any other suitable types of memory.

It should be understood that the above-mentioned memory is an example but not a limitative description. For example, the memory in this embodiment of the present application may also be a static random access memory (static RAM, SRAM), a 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, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM) and so on. That is, the memory in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

Embodiments of the present application further provide a computer-readable storage medium for storing a computer program.

Optionally, the computer-readable storage medium can be applied to the network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, here No longer.

Optionally, the computer-readable storage medium can be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal in each method of the embodiments of the present application, in order to It is concise and will not be repeated here.

Embodiments of the present application also provide a computer program product, including computer program instructions.

Optionally, the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. Repeat.

Optionally, the computer program product can be applied to the mobile terminal/terminal in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the mobile terminal/terminal in each method of the embodiments of the present application, for the sake of brevity. , and will not be repeated here.

The embodiments of the present application also provide a computer program.

Optionally, the computer program can be applied to the network device in the embodiments of the present application. When the computer program is run on the computer, it causes the computer to execute the corresponding processes implemented by the network device in each method of the embodiments of the present application. For the sake of brevity. , and will not be repeated here.

Optionally, the computer program may be applied to the mobile terminal/terminal in the embodiments of the present application, and when the computer program runs on the computer, the computer executes the corresponding functions implemented by the mobile terminal/terminal in each method of the embodiments of the present application. The process, for the sake of brevity, will not be repeated here.

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described systems, devices and units may refer to the corresponding processes in the foregoing method embodiments, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as independent products, may be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution, and the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory,) ROM, random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. should be covered within the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (31)

1. A network communication method, the method comprising: When the terminal accesses the second network from the first network, the access network element of the second network receives the first bearer or data stream establishment/modification request message sent by the first core network element; The access network element of the second network triggers the terminal to return to the first network based on the first indication information; wherein the first indication information is included in the establishment/modification of the first bearer or data flow in the request message; The first indication information includes at least one of the following: Fallback indication information corresponding to a specific service, an identifier for initiating a first bearer or data stream establishment for a specific service, and first time information, where the first time information is used to determine the moment when the terminal is triggered to return to the first network; Wherein, the specific service needs to be executed under the second network. 2. The method according to claim 1, wherein the access network element of the second network triggers the terminal to return to the first network based on a target event, which occurs in the first bearer or data flow after release. 3. The method of claim 1, wherein the first indication information further comprises an identifier of the first network. 4. The method of claim 1, wherein the specific service includes at least voice or video service. The method according to claim 1, wherein, based on the first indication information, the access network element of the second network triggers the terminal to return to the first network, comprising: The access network element of the second network receives the first bearer or data stream establishment/modification request message within the first time period after the terminal accesses, and triggers the terminal to return to the first network. 6. The method according to any one of claims 1 to 5, wherein the triggering the terminal to return to the first network comprises: A handover or redirection process is initiated to the terminal, and the terminal is triggered to return to the first network through the handover or redirection. 7. The method according to claim 6, wherein the triggering the terminal to return to the first network through redirection comprises: An RRC release message is sent to the terminal to release the RRC connection so that the terminal reselects to a cell of the first network. 8. The method according to any one of claims 1 to 5, wherein the terminal accessing from the first network to the second network comprises: The terminal accesses from the first network to the second network through handover or redirection. 9 . The method according to claim 1 , wherein, in the case of EPS fallback, the first network and the second network have different core networks and different access networks. 10 . 10. The method according to any one of claims 1 to 5, wherein in the case of RAT fallback, the first network and the second network have the same core network and different access networks. 11. The method according to any one of claims 1 to 5, wherein, in the case of EPS fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is SMF and PGW- C's co-located network element. 12. The method according to any one of claims 1 to 5, wherein, in the case of RAT fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is an AMF. 13. A network communication method, the method comprising: The access network element receives the first bearer or data stream establishment/modification request message sent by the core network element; If the first bearer or data flow establishment/modification request message carries the first indication information, determine the target network to be accessed and/or the time and/or the time to access the target network according to the first indication information conditions for accessing the target network; Wherein, the first indication information includes at least one of the following: The identity of the original network, the identity for initiating the establishment of the first bearer or data flow for a specific service, and the second time information, where the second time information is used to determine the time of accessing the target network and the conditions for accessing the target network; wherein , the specific service needs to be executed under the target network. 14. The method of claim 13, wherein the first indication information further comprises an identification of the target network. 15. A network communication device, the device comprising: a receiving unit, configured to receive a first bearer or a data stream establishment/modification request message sent by the network element of the first core network when the terminal accesses the second network from the first network; a triggering unit, configured to trigger the terminal to return to the first network based on first indication information; wherein, the first indication information is included in the first bearer or data stream establishment/modification request message; The first indication information includes at least one of the following: Fallback indication information corresponding to a specific service, an identifier for initiating a first bearer or data stream establishment for a specific service, and first time information, where the first time information is used to determine the moment when the terminal is triggered to return to the first network; Wherein, the specific service needs to be executed under the second network. The apparatus according to claim 15, wherein the triggering unit is configured to trigger the terminal to return to the first network based on a target event after the first bearer or data stream is released. 17. The apparatus of claim 15, wherein the first indication information further comprises an identification of the first network. 18. The apparatus of claim 15, wherein the specific service includes at least voice or video service. 19. The apparatus according to claim 15, wherein the triggering unit is configured to receive the first bearer or data stream establishment/modification request message within a first time period after the terminal accesses, and trigger the The terminal returns to the first network. 20. The apparatus according to any one of claims 15 to 19, wherein the triggering unit is configured to initiate a switching or redirection process to the terminal, and trigger the terminal to return to the desired terminal through the switching or redirection. Describe the first network. 21. The apparatus according to claim 20, wherein the triggering unit is configured to send an RRC release message to the terminal to release an RRC connection, so that the terminal reselects to a cell of the first network. 22. The apparatus according to any one of claims 15 to 19, wherein the terminal accessing from the first network to the second network comprises: The terminal accesses from the first network to the second network through handover or redirection. 23. The apparatus according to any one of claims 15 to 19, wherein in the case of EPS fallback, the first network and the second network have different core networks and different access networks. 24. The apparatus according to any one of claims 15 to 19, wherein in the case of RAT fallback, the first network and the second network have the same core network and different access networks. 25. The apparatus according to any one of claims 15 to 19, wherein, in the case of EPS fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is SMF and PGW- C's co-located network element. 26. The apparatus according to any one of claims 15 to 19, wherein, in the case of RAT fallback, the first core network element that triggers the first bearer or data flow establishment/modification request message is an AMF. 27. A network communication device, the device comprising: a receiving unit, configured to receive a first bearer or a data stream establishment/modification request message sent by a core network element; A determining unit, configured to determine the target network to be accessed and/or the time and time of accessing the target network according to the first indication information if the first bearer or data flow establishment/modification request message carries the first indication information / or conditions of access to the target network; Wherein, the first indication information includes at least one of the following: The identity of the original network, the identity for initiating the establishment of the first bearer or data flow for a specific service, and the second time information, where the second time information is used to determine the time of accessing the target network and the conditions for accessing the target network; wherein , the specific service needs to be executed under the target network. 28. The apparatus of claim 27, wherein the first indication information further comprises an identification of the target network. 29. A network device, comprising: a processor and a memory, the memory is used to store a computer program, the processor is used to call and run the computer program stored in the memory to execute any one of claims 1 to 12 The method, or the method of any one of claims 13 to 14. 30. A chip comprising: a processor for invoking and running a computer program from a memory to cause a device on which the chip is installed to perform the method of any one of claims 1 to 12, or claim 13 The method of any one of to 14. 31. A computer-readable storage medium for storing a computer program that causes a computer to perform the method of any one of claims 1 to 12, or any one of claims 13 to 14 Methods.

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