CN117545046A

CN117545046A - Terminal communication method and terminal equipment

Info

Publication number: CN117545046A
Application number: CN202311634662.XA
Authority: CN
Inventors: 黎溢贤
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-02-09

Abstract

The embodiment of the application discloses a terminal communication method and terminal equipment, wherein the terminal communication method comprises the following steps: the terminal equipment acquires the type of a first network which is accessed currently; if the type of the first network is the first type, the terminal equipment determines to reside in the first network for a long time; the terminal equipment can judge whether second network switching is needed or not so as to execute the first type of service; the communication modes of the first network and the second network are different.

Description

Terminal communication method and terminal equipment

Technical Field

The present application relates to, but not limited to, the field of communications, and in particular, to a terminal communication method and a terminal device.

Background

When the fifth generation mobile communication technology (5th Generation Mobile Communication Technology,5G) terminal accesses the 5G network, the Non-Access Stratum (NAS) message of the accessed registration request carries that the usage configuration (UE's service setting) of the user equipment is voice preference (voice center). If the 5G terminal can search that the 5G network cannot process the voice service, the long-term resident network of the UE can fall back to 4G/3G/2G. As such, 5G terminals that reside on 4G/3G/2G for a long period cannot use the 5G network.

Disclosure of Invention

The embodiment of the application expects to provide a terminal communication method and terminal equipment.

The technical scheme of the application is realized as follows:

a terminal communication method, the method comprising:

the terminal equipment acquires the type of a first network which is accessed currently;

if the type of the first network is a first type, the terminal equipment determines to reside in the first network for a long time;

the terminal equipment can judge whether second network switching is needed or not so as to execute the first type of service; the communication modes of the first network and the second network are different.

A terminal device, the terminal device comprising:

the first acquisition module is used for acquiring the type of the first network which is accessed currently;

the first processing module is used for determining that the terminal equipment resides in the first network for a long time if the type of the first network is a first type;

A terminal device, the terminal device comprising:

a memory for storing executable instructions;

And the processor is used for executing the executable instructions stored in the memory to realize the terminal communication method.

A computer-readable storage medium storing one or more programs executable by one or more processors to implement the steps of the terminal communication method as described above.

The terminal communication method and the terminal device provided by the embodiment of the application, wherein the terminal communication method comprises the following steps: the terminal equipment acquires the type of a first network which is accessed currently; if the type of the first network is the first type, the terminal equipment determines to reside in the first network for a long time; the terminal equipment can judge whether second network switching is needed or not so as to execute the first type of service; the communication modes of the first network and the second network are different. That is, the terminal device can reside in the network for a long time as long as the terminal device is accessed to the network corresponding to the first type, is not limited by whether the SIP is successfully registered, is not limited by whether the network corresponding to the first type can interact with the IMS, and therefore the terminal device can utilize a large bandwidth to transmit data service, and the transmission rate is low and the time delay is low.

Drawings

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2 is a flowchart of a terminal communication method according to an embodiment of the present application;

fig. 3 is a second flowchart of a terminal communication method according to an embodiment of the present application;

fig. 4 is a flowchart of a terminal communication method according to an embodiment of the present application;

fig. 5 is a flow chart diagram of a terminal communication method according to an embodiment of the present application;

fig. 6 is a flowchart fifth of a terminal communication method according to an embodiment of the present application;

fig. 7 is a flowchart sixth of a terminal communication method provided in an embodiment of the present application;

fig. 8 is a flow chart seventh of a terminal communication method provided in an embodiment of the present application;

fig. 9 is a schematic flowchart eight of a terminal communication method provided in an embodiment of the present application;

fig. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application.

As shown in fig. 1, communication system 100 may include a terminal device 110 and a network device 120. Network device 120 may communicate with terminal device 110 over the air interface. Multi-service transmission is supported between terminal device 110 and network device 120.

It should be understood that the present embodiments are illustrated by way of example only with respect to communication system 100, but the present embodiments are not limited thereto. That is, the technical solution of the embodiment of the present application may be applied to various communication systems, for example: long term evolution (Long Term Evolution, LTE) systems, LTE time division duplex (Time Division Duplex, TDD), universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), internet of things (Internet of Things, ioT) systems, narrowband internet of things (Narrow Band Internet of Things, NB-IoT) systems, enhanced Machine-type-Type Communications (eMTC) systems, 5G communication systems, also known as New Radio (NR) communication systems, or future communication systems, etc.

In the communication system 100 shown in fig. 1, the network device 120 may be an access network device in communication with the terminal device 110. The access network device may provide communication coverage for a particular geographic area and may communicate with terminal devices 110 (e.g., user devices) located within the coverage area.

The network device 120 may be an evolved base station (Evolutional Node B, eNB or eNodeB) in a long term evolution (Long Term Evolution, LTE) system, or a next generation radio access network (Next Generation Radio Access Network, NG RAN) device, or a base station (gNB) in a NR system, or a radio controller in a cloud radio access network (Cloud Radio Access Network, CRAN), or the network device 120 may be a relay station, an access point, a vehicle device, a wearable device, a hub, a switch, a bridge, a router, or a network device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc.

Terminal device 110 includes, but is not limited to, any terminal device that employs a wired or wireless connection with network device 120 or other terminal devices.

For example, the terminal device 110 may refer to an access terminal, user Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or User Equipment. An access terminal may be a cellular telephone, a cordless telephone, a session initiation protocol (Session Initiation Protocol, SIP) phone, an IoT device, a satellite handset, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handset with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, a terminal device in a 5G network or a terminal device in a future evolution network, etc. Terminals include, but are not limited to: a Handheld terminal, a notebook Computer, a Subscriber Unit (subscnber Unit), a Cellular Phone (Cellular Phone), a Smart Phone (Smart Phone), a wireless data card, a personal digital assistant (Personal Digital Assistant, PDA) Computer, a tablet Computer, a wireless Modem (Modem), a Handheld device (Handheld), a Laptop Computer (Laptop Computer), a Cordless Phone (Cordless Phone), a machine type communication (Machine Type Communication, MTC) terminal, or other network accessible devices.

The terminal Device 110 may be used for Device-to-Device (D2D) communication.

The communication system 100 may further comprise a core network device 130 in communication with the base station, which core network device 130 may be a 5G core,5gc device, e.g. an access and mobility management function (Access and Mobility Management Function, AMF) device, further e.g. an authentication server function (Authentication Server Function, AUSF) device, further e.g. a user plane function (User Plane Function, UPF) device, further e.g. a session management function (Session Management Function, SMF) device. Optionally, the core network device 130 may also be a packet core evolution (Evolved Packet Core, EPC) device of the LTE network, for example a session management function+a data gateway (Session Management Function + Core Packet Gateway, smf+pgw-C) device of the core network. It should be appreciated that SMF+PGW-C may perform the functions performed by both SMF and PGW-C. In the network evolution process, the names of the core network devices may be changed, or new network entities are formed by dividing the functions of the core network, which is not limited in this embodiment of the present application.

Communication may also be achieved by establishing connections between various functional units in the communication system 100 through a next generation Network (NG) interface.

For example, the terminal device establishes an air interface connection with the access network device through an NR interface, and is used for transmitting user plane data and control plane signaling; the terminal equipment can establish control plane signaling connection with AMF through NG interface 1 (N1 for short); an access network device, such as a next generation radio access base station (gNB), can establish a user plane data connection with a UPF through an NG interface 3 (N3 for short); the access network equipment can establish control plane signaling connection with AMF through NG interface 2 (N2 for short); the UPF can establish control plane signaling connection with the SMF through an NG interface 4 (N4 for short); the UPF can interact user plane data with the data network through an NG interface 6 (N6 for short); the AMF may establish a control plane signaling connection with the SMF through NG interface 11 (N11 for short); the SMF may establish a control plane signaling connection with the PCF via NG interface 7 (N7 for short).

Fig. 1 illustrates one base station, one core network device, and two terminal devices, alternatively, the communication system 100 may include a plurality of base station devices and each base station may include other numbers of terminal devices within a coverage area, which is not limited in this embodiment of the present application.

It should be noted that fig. 1 illustrates, by way of example, a system to which the present application is applicable, and of course, the method shown in the embodiment of the present application may be applicable to other systems. Furthermore, the terms "system" and "network" are often used interchangeably herein. The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship. It should also be understood that, in the embodiments of the present application, the "indication" may be a direct indication, an indirect indication, or an indication that there is an association relationship. For example, a indicates B, which may mean that a indicates B directly, e.g., B may be obtained by a; it may also indicate that a indicates B indirectly, e.g. a indicates C, B may be obtained by C; it may also be indicated that there is an association between a and B. It should also be understood that, in the embodiments of the present application, reference to "corresponding" may mean that there is a direct correspondence or an indirect correspondence between the two, or may mean that there is an association between the two, or may be a relationship between an instruction and an indicated, configured, or the like. It should also be understood that "predefined" or "predefined rules" mentioned in the embodiments of the present application may be implemented by pre-storing corresponding codes, tables or other manners that may be used to indicate relevant information in devices (e.g., including terminal devices and network devices), and the present application is not limited to a specific implementation thereof. Such as predefined may refer to what is defined in the protocol. It should also be understood that in the embodiments of the present application, the "protocol" may refer to a standard protocol in the communication field, and may include, for example, an LTE protocol, an NR protocol, and related protocols applied in future communication systems, which are not limited in this application.

In order to facilitate understanding of the technical solutions of the embodiments of the present application, the following describes related technologies of the embodiments of the present application:

the manner in which Voice over air Voice (Voice over New Radio, voNR) is used in 5G and the manner in which Voice over Long-Term Evolution (VoLTE) is used in 4G are both based on the internet protocol (Internet Protocol, IP). The 5G terminal defaults that UE's user setting carried by the accessed registration request NAS message is a voice center; meanwhile, after the 5G terminal is accessed to the 5G, the 5G terminal defaults to establish a protocol data unit (Protocol Data Unit, PDU) session (session) with an access point name (Access Point Name, APN) being a 5G quality of service identifier (5G Quality of Service Identifier,5QI) =5 of an IP multimedia subsystem (IP Multimedia Subsystem, IMS), and performs session initiation protocol (Session initialization Protocol, SIP) registration based on the established PDU session, so as to ensure that the terminal can perform voice call based on the IMS on the network currently accessed.

It should be noted that, if the SIP registration of the 5G terminal fails on the current network, in order to ensure that the voice function can be normally satisfied, the 5G terminal needs to re-search for the nearby 5G network to re-access and verify whether the selected network can perform SIP registration. If the 5G network does not support interaction with IMS and the 5G terminal needs to guarantee voice priority under the communication network, then, if the 5G terminal finds that the 5G network does not support interaction with IMS or that SIP registration is caused by some reasons after searching for the 5G network and accessing, the 5G terminal will not reside for a long time under the accessed network, then, the signal of searching for the 4G network will be sent, and if the 4G network environment can interact with IMS and if it can normally perform SIP registration under the 4G network is confirmed, if the 4G network still does not support interaction with IMS or that SIP registration is caused by some reasons, then, the voice service of circuit switched fallback (Circuit Switched Fallback, CSFB) can only be dropped onto 3G/2G, so that the problem that the 5G terminal cannot use the 5G network will occur.

Aiming at the problems, the related art has the following solutions: modifying the internal configuration of the terminal at the terminal side, namely modifying UE' susage setting into data priority (data center), after modification, if a 5G network which does not support interaction with IMS appears or the terminal causes SIP registration failure for some reasons, the 5G terminal can ignore the limitation of voice priority and stay on the 5G network for a long time; however, there is a problem with the above modification: the user can not perform voice calling and called, because the IMS server is not available or IMS registration fails, the user serving as a calling party can not interact with the IMS, and similarly, the called user can not transmit calling information to the called party because the IMS is not available as an intermediate medium, and the calling and called users in the 5G network can be in a 'disconnection' state. It should be noted that not all 5G terminals may implement from voice center to data center by modifying the internal parameter configuration. Therefore, for the part of the 5G terminals which do not support interaction with IMS or fail in registration when SIP registration occurs, and meanwhile, the UE's user setting cannot be modified from voice center to data center, the 5G network is purely dummy in front of them; also, there are some 5G terminals that may be in a "disconnected" state where voice service cannot be performed after modifying UE's user setting from voice center to data center.

The above related technologies may be optionally combined with the technical solutions of the embodiments of the present application, which all belong to the protection scope of the embodiments of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing embodiments of the present application only and is not intended to be limiting of the present application.

Fig. 2 is a flow chart of a terminal communication method provided in the embodiment of the present application, as shown in fig. 2, where the method is applied to a terminal device 110 in a communication system 100 shown in fig. 1, and the embodiment of the present application is not limited to this, and the method includes:

step 201, the terminal device obtains the type of the first network accessed currently.

In an embodiment of the application, a terminal device establishes a network connection with an access network, and the access network communicates with a core network connected to one or more packet data networks (Packet Data Network, PDN) providing services; the type of network accessed in the present application refers to the type of core network in communication with the access network. Here, the core network may be a core network of a mobile service provider network, such as 3G, 4G/LTE or 5G.

Step 202, if the type of the first network is the first type, the terminal device determines to reside in the first network for a long period of time.

It should be noted that, the terminal device can determine whether the second network handover is temporarily required to execute the first type of service.

In the embodiment of the application, under the condition that the terminal equipment judges that the second network switching is needed temporarily, the second network provides service for the first type of service; in case the terminal device determines that the second network handover is not needed temporarily, the first network serves the first type of service.

In the embodiment of the present application, if the type of the first network is the first type, the terminal device determines to reside in the first network for a long time; and if the type of the first network is not the first type, adjusting the type of the network accessed by the terminal equipment so as to enable the terminal equipment to be accessed to the network corresponding to the first type.

In order to realize the long-term residence of the terminal device in the first network, the limitation that the terminal device cannot interact with the IMS on the first network or does not reside in the first network after the SIP registration fails is required to be relieved at the terminal device side. For example, if the terminal device cannot interact with the IMS on the 5G network, the terminal device may also reside on the 5G network; or in case the terminal device fails SIP registration, then the terminal device may also reside on the 5G network.

The above-described operations of releasing the restriction may include: deleting the voice center or the data center in UE' susage setting carried by a registration request NAS message accessed by the terminal equipment; that is, UE's user setting has neither a voice center nor a data center.

In this embodiment of the present application, the terminal device includes a plurality of communication apparatuses, and the plurality of communication apparatuses may support a plurality of communication systems. For example, a plurality of communication devices support cellular communication, wireless-Fidelity (Wi-Fi) communication, and the like.

Communication services supported by the communication device supporting cellular communication include, but are not limited to, global system for mobile communications (Global System for Mobile Communications, GSM) mobile communications, code division multiple access (Code Division Multiple Access, CDMA) mobile communications, 3G mobile communications, 4G mobile communications, 5G mobile communications.

Among them, the communication services supported by the communication device supporting Wi-Fi communication include, but are not limited to, first generation 802.11 communication services, second generation 802.11b communication services, third generation 802.11g/a communication services, fourth generation 802.11n communication services, and fifth generation 802.11ac communication services.

The terminal communication method provided by the embodiment of the application comprises the following steps: the terminal equipment acquires the type of a first network which is accessed currently; if the type of the first network is the first type, the terminal equipment determines to reside in the first network for a long time; the terminal equipment can judge whether second network switching is needed or not so as to execute the first type of service; the communication modes of the first network and the second network are different. That is, the terminal device can stay in the network for a long time as long as the terminal device is accessed to the network corresponding to the first type, is not limited by whether the SIP is successfully registered or not, is not limited by whether the network corresponding to the first type can interact with the IMS or not, and can transmit data service by using a large bandwidth, and has low transmission rate and time delay; meanwhile, the cost of upgrading and reforming by the later investment of manpower and material resources of operators is reduced.

Fig. 3 is a flow chart of a terminal communication method provided in the embodiment of the present application, as shown in fig. 3, where the method is applied to a terminal device 110 in a communication system 100 shown in fig. 1, and the embodiment of the present application is not limited to this, and the method includes:

step 301, the terminal device obtains the type of the first network accessed currently.

Step 302, if the type of the first network is the first type, the terminal device determines to reside in the first network for a long period of time.

Step 303, if the terminal device cannot execute the first type service based on the first network, the terminal device temporarily drops the currently accessed network from the first network to the second network, and executes the first type service based on the second network.

In the embodiment of the application, the manner of dropping from the first network, such as 5G, to the second network, such as 4G or 3G, includes, but is not limited to, a blind redirection manner, a measurement redirection manner, and an N26 handover manner.

In this embodiment, executing the first type of service based on the second network may be understood as providing the service for the first type of service by the second network.

In the embodiment of the present application, the terminal device cannot execute the first type service based on the first network, including but not limited to, SIP registration failure of the terminal device in the first network, or the terminal device does not support interaction with IMS in the first network, i.e. no IMS.

Step 304, if the execution of the first type service is finished, the terminal device re-accesses the first network.

In the embodiment of the present application, when the terminal device cannot execute the first type service based on the first network, the terminal device may temporarily fall back into the second network capable of executing the first type service, and quickly access the first network after the first type service is processed. If the second type of service is concurrent with the first type of service, the terminal device may delay processing the second type of service, or may attempt to use the first network accessed before to serve the second type of service.

In some embodiments, taking the first type service as the voice service as an example, in step 303, if the terminal device cannot execute the first type service based on the first network, the terminal device temporarily drops the currently accessed network from the first network to the second network, and executes the first type service based on the second network, which may be implemented through steps A1 to A4, or may also be implemented through steps A1 to A3, and steps A5 to A6:

And A1, the terminal equipment receives a first message sent by the first network equipment.

In this embodiment of the present application, a manner of sending the first message: in-band, out-of-band, media, signaling, data, messages, control plane, user plane, etc.

In the embodiment of the present application, the first message may be a request, a response, an indication, a reply, or the like.

In this embodiment of the present application, the first network device is a network device corresponding to the first network, for example, a gNB.

It should be noted that, the first message, also called a fallback message, is used to instruct the terminal device to temporarily fallback the currently accessed network to the second network.

For example, in the case that the second network is a 4G network, the first message is a redirect 4G message, where the redirect 4G message is used to instruct the terminal device to temporarily drop the currently accessed network back to the 4G network.

Here, the second network includes a first sub-network, for example, 4G, and a second sub-network, for example, 3G/2G, which differ in communication system from the first sub-network.

And step A2, the terminal equipment responds to the first message and calls a fallback means to fallback the network which is accessed currently to the first sub-network.

And A3, the terminal equipment sends a first request to core network equipment corresponding to the first sub-network.

Wherein the first request is used for indicating the terminal equipment to perform session registration in the first sub-network.

In the embodiment of the application, after the terminal equipment is successfully accessed to the first sub-network, the SIP registration is required to be performed so as to ensure that the terminal can perform voice call based on IMS on the network which is accessed currently.

In this embodiment of the present application, the terminal device sends a first request, also called invite request (invite request), to a core network device corresponding to the first sub-network, for example, EPC, where the invite request is used to perform SIP registration.

It should be noted that, in step A3, the first request is sent to the core network device corresponding to the first sub-network only when the network to which the terminal device is currently connected successfully falls back to the first sub-network.

And step A4, if the session registration is successful, the terminal equipment executes the first type of service based on the first sub-network.

In this embodiment, executing the first type of service based on the first sub-network may be understood as providing the service for the first type of service by the first sub-network.

And step A5, if the terminal equipment cannot execute the first type service based on the first sub-network, the terminal equipment drops the network accessed by the terminal equipment back to the second sub-network.

In the embodiment of the present application, the terminal device cannot execute the first type service based on the first sub-network, including but not limited to, a session registration failure of the terminal device in the first sub-network, or that the terminal device does not support interaction with the IMS in the first sub-network.

And step A6, the terminal equipment executes the first type service based on the second sub-network.

In this embodiment, executing the first type of service based on the second sub-network may be understood as providing the service for the first type of service by the second sub-network.

In some embodiments, before performing step A1, the method provided in the embodiments of the present application includes the following:

the terminal device determines whether the terminal device is in a connection state, and if the terminal device is in the connection state, the core network device corresponding to the first network, for example, the 5GC, sends a notify message to the first network device, for example, the 5G indoor baseband processing unit (Building Base band Unit, BBU), so as to inform the user that the voice service needs to be performed.

In some embodiments, if the terminal device is in a non-connection state and the request corresponding to the first type of service is a calling request, the terminal device sends a second request carrying an indication parameter to the first network device; the indication parameter is used for indicating the first network equipment to temporarily adjust the access network of the terminal equipment.

Illustratively, the terminal device, e.g. UE, sends a second request, e.g. a radio resource control (Radio Resource Control, RRC) setup request (setup request), carrying the indication parameter to the first network device, e.g. the 5G BBU; the RRC setup request request message carries an indication parameter for indicating the first network device to temporarily adjust the access network of the terminal device, for example, the carried cause (cause) value is mo-voice, that is, the application carries a specific value in a specific message, so after the 5G BBU receives the message carrying the specific value, the network accessed by the calling terminal is directly switched to the 4G network through measurement redirection or blind redirection, after the network falls back to the 4G network, the terminal rapidly completes SIP registration, then continues to execute the initiated voice call, and performs voice service.

In some embodiments, if the terminal device is in a connection state and the request corresponding to the first type service is a calling request, the terminal device sends a fourth request to the core network device corresponding to the first network, so that the core network device corresponding to the first network responds to the fourth request and sends a notification message to the first network device; the notification message is used for notifying the first network device that the terminal device needs to temporarily switch the currently accessed network from the first network to the second network so as to execute the first type of service.

In some embodiments, if the terminal device is in a non-connection state and the request corresponding to the first type of service is a called request, the terminal device receives a second message sent by a core network device corresponding to the first network; the second message is used for switching the terminal equipment to the connection state. Here, the second message is generated by the core network device corresponding to the first network based on the received user information of the called user. The user information of the called user is carried in a fourth request sent to the core network equipment corresponding to the first network by the core network equipment corresponding to the calling terminal equipment.

In the case that the request corresponding to the first type service is a called request, the network accessed by the calling terminal device which sends the call request currently can be either the first network or the second network.

It should be noted that, if the calling terminal and the called terminal are located in the same network, for the called user in an idle state, when the core network device corresponding to the called terminal accessing the first network, for example, the first 5GC receives the information of the called user transmitted from the first evolved packet core (Evolved Packet Core, EPC) or the second 5GC, which is corresponding to the calling terminal accessing the second network or the first network, the first 5GC pages the called user according to the user information, and simultaneously sends a notify message to the first network device, that is, the first 5G BBU, so as to notify the first 5G BBU that the first 5G BBU user needs to fall back to 4G for voice. After the called user establishes the RRC connection, the first 5GBBU immediately initiates measurement redirection or blind redirection to enable the user to fall back to 4G, and then SIP registration is completed rapidly for voice service.

It should be noted that, if the calling terminal and the called terminal are in different networks, when the 5GC of the called user in idle state receives the called user information transmitted by the 5GC or EPC of the opposite terminal, the 5GC pages the called user according to the user information, and sends a notify message to the 5G BBU, the user needs to fall back to the 4G to perform voice, after the called user establishes RRC connection, the 5G BBU immediately initiates measurement redirection or blind redirection to enable the user to fall back to the 4G, and then rapidly completes SIP registration to perform voice service.

Taking a first type of service as a voice service, wherein the first network is a 5G network, the first sub-network is a 4G network, and the second sub-network is a 3G/2G network as an example, when the calling and called terminals have no IMS available or SIP registration failure on the 5G network, the calling and called users perform voice service according to the following strategies:

in the case that the terminal device is a calling terminal and no IMS is available or SIP registration fails on the 5G network accessed by the calling terminal, the calling user may perform a voice service according to the steps shown in fig. 4, as shown in fig. 4:

step 401, the calling terminal initiates a voice service under the 5G network.

Step 402, the calling terminal judges whether the calling terminal is in an idle state; if in idle state, step 403 is executed, otherwise step 404 is executed.

Step 403, the calling terminal sends a RRC setup request message carrying a cause value mo-voice, i.e. a second request, to the first network device, for example, the 5G BBU; the 5G BBU receives the RRC setup request message; further, step 406 is performed.

Step 404, the calling terminal sends an invite request message, i.e. a fourth request, to a core network device corresponding to the first network, e.g. a 5 GC; the 5GC receives the invite request message; further, step 405 is performed.

Step 405, the 5GC sends a notify message to the 5G BBU to inform the 5G BBU that the calling terminal needs to perform the voice service.

When the terminal sends an invite request message through the established PDU session of 5 qi=5, the 5GC sends a notify message to the 5GC to tell the 5G BBU that the terminal of the network needs to perform the voice service when the 5GC receives the invite request message initiated by the terminal using the link of 5 qi=5.

Step 406, triggering the user to fall back to the 4G wireless network by the 5G BBU according to the configured fall-back 4G mode, and performing SIP registration.

It should be noted that, the 5G BBU may directly perform measurement redirection or blind redirection to switch the network accessed by the calling terminal to the 4G network through the cause value carried in the RRC setup request message being mo-voice.

Step 407, the calling terminal judges whether SIP registration is completed; if yes, go to step 408; otherwise, step 409 is performed.

And step 408, continuing to execute the voice service flow in the 4G network, and quickly returning to the 5G wireless network to continue data service transmission after the voice is finished.

It should be noted that, if no IMS is still available in the 4G network environment, the voice service is performed by executing the voice mode of CSFB, so as to ensure that the voice can be performed normally.

And 409, executing CSFB voice service flow, and quickly returning to the 5G wireless network to continue data service transmission after voice is finished.

In the case that the terminal device is a called terminal and no IMS is available or SIP registration fails on the 5G network accessed by the called terminal, the called user may perform a voice service according to the steps shown in fig. 5, as shown in fig. 5:

step 501, the calling terminal initiates a voice service under the same or non-same 5G/4G/3G/2G network as the called terminal.

In the call service, when a calling party calls a called party, a multimedia session is established with the called party through an invite request, and the establishment of the multimedia session is realized through an IMS network. In addition, communication between the calling party and the called party needs to be implemented through the base station and the core network device which are respectively accessed. Therefore, an invite request initiated when a calling party triggers a call service is transmitted to core network equipment through a base station accessed by the calling party, a multimedia session facing the calling party between the core network equipment and an IMS network is established, and then the invite request is transmitted to a called party through the core network equipment and the base station accessed by the called party in the IMS network. After an invite request initiated by a calling party is sent to core network equipment through an IMS network, the core network equipment sends the invite request to called party UE through a base station, namely the core network equipment sends the invite request to the base station accessed by the called party UE, and then the invite request is sent to the called party UE through the base station.

In the embodiment of the application, the calling terminal initiates the voice service under the same 5G/4G/3G/2G network, namely, the calling terminal and the called terminal are in the same 5G/4G/3G/2G communication coverage area, and the invite request can be transmitted by the EPC.

In the embodiment of the application, the calling terminal initiates the voice service under the non-identical 5G/4G/3G/2G network, namely, the calling terminal and the called terminal are in the communication coverage area of the non-identical 5G/4G/3G/2G network, and can transmit an invite request by 5GC and EPC.

Step 502, the core network device corresponding to the called terminal, for example, the 5GC receives the 5GC/EPC and sends the voice service to the called user.

Step 503, the called terminal judges whether the called terminal is in an idle state; if in the idle state, step 504 is performed, otherwise step 505 is performed.

Step 504, 5GC sends paging message, i.e. second message, to the called terminal to page the called user, and the called user performs RRC connection establishment; further, step 505 is performed.

Step 505, the 5GC sends a notify message to the first network device, e.g. the 5G BBU, informing the user that voice services are required.

Step 506, the 5G BBU triggers the user to fall back to the 4G wireless network according to the configured fall-back 4G mode, and performs SIP registration.

Step 507, the called terminal judges whether SIP registration is completed; if yes, go to step 508; otherwise, step 509 is performed.

And 508, continuing to execute the voice service flow in the 4G network, and quickly returning to the 5G wireless network to continue data service transmission after the voice is finished.

Step 509, fall back to the 2/3G network to wait for the called party, and then continue the voice service flow.

It should be noted that, for the called user, the normal voice call based on the IMS is that the IMS forwards the message to the called after receiving the invite request message of the calling party, and then is called to establish the relevant resources required by the voice, etc.; when no IMS or IMS registration fails, the called user can only send a notify message to the 5G BBU through the 5GC to inform the user that the voice service needs to be carried out, the 5G BBU immediately initiates measurement redirection or blind redirection after receiving the notify message to enable the user to fall back to 4G, then the SIP registration is rapidly completed, the invite request message is received, then the voice service is carried out, and after the voice service is finished, the data transmission service is recovered through Fast return (Fast return) 5G.

For example, the application mainly relates to 5GC and gNB, for example, 5G BBU and 5G UE perform related signaling interaction, and after falling back to 4G, the voice flow may still perform voice service according to the manner of VoLTE or CSFB. The signaling flow related to the present application is as follows:

the signaling flow involved for calling UE in idle state is shown in fig. 6:

step 601, the calling UE sends RRC setup request message to the gNB.

Note that, the RRC setup request message carries an indication parameter, mo-voice, which is used to instruct the gNB to temporarily adjust the access network of the calling UE.

Step 602, the gNB sends a redirect 4G message to the calling UE.

It should be noted that the redirection 4G message is used to indicate that the network accessed by the calling UE needs to be switched to the 4G network.

Step 603, the calling UE sends an access (access) 4G message to the eNB.

It should be noted that the access 4G message is used to instruct the calling UE to access the eNB.

Step 604, the calling UE sends an invite request message to the EPC.

Note that the invite request message is used to instruct session registration in the 4G network.

The signaling flow involved for the calling UE in the connected state is as shown in fig. 7:

In step 701, the calling UE sends a first invite request message, i.e. a fourth request, to the 5 GC.

Step 702, 5GC sends notify message to the gNB.

Note that, the notify message is used to notify the gNB, and the calling UE needs to temporarily switch the currently accessed network from the 5G network to the 4G network to perform the voice service.

Step 703, the gNB sends a redirect 4G message to the calling UE.

Step 704, the calling UE sends an access 4G message to the eNB.

Step 705, the calling UE sends a second invite request message to the EPC.

It should be noted that the second invite request message is used to instruct to perform session registration in the 4G network.

The signaling flow involved for the called UE in idle state is shown in fig. 8:

preferably, the 5GC receives a first invite request message sent by the EPC/other 5GC/other EPC, and further performs the following steps:

step 801, 5GC sends paging message to the called UE.

It should be noted that, the paging message user pages the called user and switches the state of the called UE to the connection state.

Step 802, 5GC sends notify message to the gNB.

It should be noted that, the notify message is used to notify the gNB, and the called UE needs to temporarily switch the currently accessed network from the 5G network to the 4G network to execute the voice service.

Step 803, the called UE sends RRC setup request message to the gNB.

Note that RRC setup request message is used to establish RRC connection

Step 804, the gNB sends a redirect 4G message to the called UE.

It should be noted that the redirection 4G message is used to indicate that the network accessed by the called UE needs to be switched to the 4G network.

Step 805, the called UE sends an access 4G message to the eNB.

It should be noted that the access 4G message is used to instruct the called UE to access the eNB.

Step 806, the called UE sends a second invite request message to the EPC.

The signaling flow involved for the called UE in the connected state is shown in fig. 9:

first, the 5GC receives the invite request message sent by EPC/other 5GC/other EPC, and then performs the following steps:

step 901, 5GC sends notify message to the gNB.

Step 902, the gNB sends a redirect 4G message to the called UE.

Step 903, the called UE sends an access 4G message to the eNB.

Step 904, the called UE sends an invite request message to the EPC.

In order to ensure voice priority, in a wireless network environment without an IMS or a wireless network environment with failed SIP registration, the terminal communication method provided by the application includes a fallback waiting 4G network for VoLTE or a CSFB mode processing after the fallback 4G network for the terminal access, thus ensuring that voice can be normally performed and the terminal is not in a 'disconnection' state.

An embodiment of the present application provides a terminal device 110, where the terminal device 110 may be used to implement a terminal communication method provided in the embodiment corresponding to fig. 2, and referring to fig. 10, the terminal device 110 includes:

an obtaining module 1001, configured to obtain a type of a first network currently accessed;

A processing module 1002, configured to determine that the terminal device resides in the first network for a long period of time if the type of the first network is the first type;

In other embodiments of the present application, the processing module 1002 is configured to, if the terminal device cannot execute the first type service based on the first network, temporarily drop the currently accessed network from the first network back to the second network, and execute the first type service based on the second network; and if the execution of the first type of service is ended, the terminal equipment re-accesses the first network.

In other embodiments of the present application, the second network includes a first sub-network, and a receiving module 1003, configured to receive, by a terminal device, a first message sent by a first network device;

a processing module 1002, configured to invoke a fallback means to fallback the currently accessed network to the first sub-network in response to the first message;

a sending module 1004, configured to send a first request to a core network device corresponding to the first sub-network by using a terminal device; the first request is used for indicating the terminal equipment to register a session in the first sub-network;

The processing module 1002 is configured to execute, by the terminal device, a first type of service based on the first sub-network if session registration is successful.

In other embodiments of the present application, the second network further includes a second sub-network, and the processing module 1002 is configured to, if the terminal device cannot execute the first type service based on the first sub-network, drop the network accessed by the terminal device back to the second sub-network; the terminal equipment executes the first type service based on the second sub-network; the communication modes of the first sub-network and the second sub-network are different.

In other embodiments of the present application, the processing module 1002 is configured to determine whether the terminal device is in a connection state;

a sending module 1004, configured to send, if the terminal device is in a non-connection state and a request corresponding to the first type service is a calling request, a second request carrying an indication parameter to the first network device by the terminal device; the indication parameter is used for indicating the first network equipment to temporarily adjust the access network of the terminal equipment.

In other embodiments of the present application, the receiving module 1003 is configured to receive, if the terminal device is in a non-connected state and the request corresponding to the first type of service is a called request, a second message sent by a core network device corresponding to the first network by the terminal device; the second message is used for switching the terminal equipment to the connection state.

In other embodiments of the present application, the receiving module 1003 is configured to, if the terminal device is in a connection state and the request corresponding to the first type service is a calling request, send a fourth request to a core network device corresponding to the first network by the terminal device, so that the core network device corresponding to the first network responds to the fourth request and sends a notification message to the first network device; the notification message is used for notifying the first network device that the terminal device needs to temporarily switch the currently accessed network from the first network to the second network so as to execute the first type of service.

In other embodiments of the present application, the second message is generated by the core network device corresponding to the first network based on the received user information of the called user.

In other embodiments of the present application, the user information of the called user is carried in a fourth request sent by the core network device corresponding to the calling terminal device to the core network device corresponding to the first network.

The description of the apparatus embodiments above is similar to that of the method embodiments above, with similar advantageous effects as the method embodiments. For technical details not disclosed in the apparatus embodiments of the present application, please refer to the description of the method embodiments of the present application for understanding.

In the embodiment of the present application, if the terminal communication method is implemented in the form of a software function module and sold or used as a separate product, the terminal communication method may also be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or part contributing to the related art, and the computer software product may be stored in a storage medium, and include several instructions to cause a terminal device to execute all or part of the methods of the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a magnetic disk or an optical disk. Thus, embodiments of the present application are not limited to any specific combination of hardware and software.

Fig. 11 is a schematic structural diagram of a communication device provided in an embodiment of the present application. The aforementioned terminal device may be implemented by the communication device 1100 in fig. 11. The communication device 1100 shown in fig. 11 comprises at least one processor 1101, a memory 1102, and a communication line 1103. The network function 1100 may also include at least one of a transceiver 1104 and a communication interface 1105.

The processor 1101 may be a general purpose central processing unit (Central Processing Unit, CPU), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the programs of the present Application.

Communication line 1103 may include a pathway to transfer information between such components.

The transceiver 1104 uses any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (Radio Access Network, RAN), wireless local area network (Wireless Local Area Networks, WLAN), etc. The transceiver 1104 may also be a transceiver circuit or transceiver.

The communication device may also include a communication interface 1105.

The Memory 1102 may be, but is not limited to, read-Only Memory (ROM) or other type of static storage device that can store static information and instructions, random access Memory (Random Access Memory, RAM) or other type of dynamic storage device that can store information and instructions, but may also be electrically erasable programmable Read-Only Memory (Electrically Erable Programmable Read-Only Memory, EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory) or other optical disk storage, optical disk storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be separate and coupled to the processor 1101 by communication line 1103. The memory 1102 may also be integral with the processor 1101.

The memory 1102 is used for storing computer-executable instructions for executing the embodiments of the present application, and the processor 1101 controls the execution. The processor 1101 is configured to execute computer-executable instructions stored in the memory 1102, thereby implementing a method for terminal communication provided in the above-described method embodiments of the present application.

In one possible implementation, the computer-executable instructions in the embodiments of the present application may also be referred to as application program code, which is not specifically limited in this embodiment of the present application.

The processor 1101 may include one or more CPUs, as one embodiment. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer-executable instructions).

From the perspective of functional units, the present application may perform functional unit division on each network function according to the above method embodiment, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one functional unit. The integrated functional units may be implemented in hardware or in software.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product.

The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). Computer readable storage media can be any available media that can be stored by a computer or data storage devices such as servers, data centers, etc. that contain an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.

Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of the above embodiments may be implemented by a program to instruct related hardware, the program may be stored in a computer readable storage medium, and the storage medium may include: ROM, RAM, magnetic or optical disks, etc.

The foregoing describes in detail the terminal communication method and the terminal device provided in the embodiments of the present application, and specific examples are applied to describe the principles and embodiments of the present application, where the descriptions of the foregoing embodiments are only used to help understand the method and the core idea of the present application; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims

1. A terminal communication method, the method comprising:

2. The method of claim 1, the method further comprising:

if the terminal equipment cannot execute the first type service based on the first network, the terminal equipment temporarily drops the currently accessed network from the first network to a second network, and executes the first type service based on the second network;

and if the execution of the first type of service is finished, the terminal equipment re-accesses the first network.

3. The method of claim 2, the second network comprising a first sub-network, the terminal device temporarily dropping a currently accessed network back from the first network to a second network, and performing the first type of traffic based on the second network, comprising:

the terminal equipment receives a first message sent by first network equipment;

the terminal equipment responds to the first message and calls a fallback means to fallback the currently accessed network to the first sub-network;

the terminal equipment sends a first request to core network equipment corresponding to the first sub-network; the first request is used for indicating the terminal equipment to perform session registration in the first sub-network;

and if the session registration is successful, the terminal equipment executes the first type of service based on the first sub-network.

4. A method according to claim 3, the second network further comprising a second sub-network, the method further comprising:

if the terminal equipment cannot execute the first type service based on the first sub-network, the terminal equipment drops the network accessed by the terminal equipment back to the second sub-network;

the terminal equipment executes the first type service based on the second sub-network; wherein, the communication modes of the first sub-network and the second sub-network are different.

5. A method according to claim 3, the method further comprising, before the terminal device receives the first message sent by the first network device:

the terminal equipment determines whether the terminal equipment is in a connection state or not;

if the terminal equipment is in a non-connection state and the request corresponding to the first type of service is a calling request, the terminal equipment sends a second request carrying an indication parameter to the first network equipment; the indication parameter is used for indicating the first network equipment to temporarily adjust the access network of the terminal equipment.

6. The method of claim 5, the method further comprising:

if the terminal equipment is in a non-connection state and the request corresponding to the first type of service is a called request, the terminal equipment receives a second message sent by core network equipment corresponding to a first network; the second message is used for switching the terminal equipment to a connection state.

7. The method of claim 5, the method further comprising:

if the terminal equipment is in a connection state and the request corresponding to the first type service is a calling request, the terminal equipment sends a fourth request to core network equipment corresponding to a first network, so that the core network equipment corresponding to the first network responds to the fourth request and sends a notification message to the first network equipment;

the notification message is used for notifying the first network device that the terminal device needs to temporarily switch the currently accessed network from the first network to the second network so as to execute the first type of service.

8. The method of claim 6, wherein the second message is generated by a core network device corresponding to the first network based on the received user information of the called user.

9. The method of claim 8, wherein the user information of the called user is carried in a fourth request sent from the core network device corresponding to the calling terminal device to the core network device corresponding to the first network.

10. A terminal device, comprising: