CN111698772A

CN111698772A - Registration method and device of 5G system, storage medium and terminal

Info

Publication number: CN111698772A
Application number: CN202010426501.1A
Authority: CN
Inventors: 朱中华; 程滨
Original assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Current assignee: Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
Priority date: 2020-05-19
Filing date: 2020-05-19
Publication date: 2020-09-22
Anticipated expiration: 2040-05-19
Also published as: CN111698772B

Abstract

The embodiment of the application discloses a registration method, a registration device, a storage medium and a terminal of a 5G system, and belongs to the technical field of computers. The method is applied to a terminal in an NSA mode of a non-independent networking, the terminal initiates a VoLTE call flow in a 5G system, the terminal registers in the 5G system through the NSA mode, when the VoLTE call flow is determined to be failed in calling, the connection of the 5G system is disconnected, a circuit domain call flow is initiated through a CSFB flow, when the circuit domain call flow is completed, pre-stored 5G registration information is obtained, and the 5G registration information is re-registered in the 5G system, so that the terminal can quickly re-establish the connection of the 5G system, the registration time of the 5G system is saved, and the communication experience of a user is improved.

Description

Registration method and device of 5G system, storage medium and terminal

Technical Field

The present application relates to the field of computer technologies, and in particular, to a registration method and apparatus for a 5G system, a storage medium, and a terminal.

Background

With the development of 5G (5th generation mobile networks, fifth generation mobile communication technology), the coverage of 5G networks is more and more extensive, and currently, there are two main 5G network modes: the non-independent networking NSA mode and the independent networking SA mode are adopted, the 5G network in the NSA mode needs to rely on the LTE network to complete 5G service transmission, and meanwhile, more mature and stable VoLTE voice services can be carried out in the NSA mode. In the related art, when a terminal cannot successfully initiate a VoLTE call flow in an LTE network that does not support VoLTE voice service, the current 5G network needs to be switched to a 2G network or a 3G network, and after a circuit domain call flow is completed through the 2G network or the 3G network, the terminal needs to search and register the 5G network again, so that the terminal consumes a long time to reestablish 5G network connection, and bad communication experience is caused to a user.

Disclosure of Invention

The embodiment of the application provides a registration method, a registration device, a storage medium and a terminal of a 5G system, and can solve the problems that the terminal needs to spend long time to re-register a 5G network and bad communication experience is caused to a user. The technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a registration method for a 5G system, where the method applies a terminal supporting an dependent networking NSA mode, and the method includes:

the terminal initiates a VoLTE call flow under a 5G system; wherein the terminal registers to the 5G system through an NSA mode;

when determining that the VoLTE call flow fails, disconnecting the 5G system, and initiating a circuit domain call flow through a CSFB flow;

and when the circuit domain call flow is finished, acquiring pre-stored 5G registration information, and re-registering to the 5G system based on the 5G registration information.

In a second aspect, an embodiment of the present application provides a registration apparatus for a 5G system, where the apparatus is applied to a terminal supporting a non-independent networking NSA mode, and the apparatus includes:

the calling module is used for the terminal to initiate a VoLTE calling process in the 5G system; the terminal is registered to the 5G system through the NSA mode;

the processing module is used for disconnecting the 5G system when determining that the VoLTE call flow fails, and initiating a circuit domain call flow through a CSFB flow;

and the registration module is used for acquiring pre-stored 5G registration information when the circuit domain call flow is completed, and re-registering the 5G registration information to the 5G system based on the 5G registration information.

In a third aspect, embodiments of the present application provide a computer storage medium storing a plurality of instructions adapted to be loaded by a processor and to perform the above-mentioned method steps.

In a fourth aspect, an embodiment of the present application provides a terminal, including: the system comprises a processor, a memory and a display screen; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.

The beneficial effects brought by the technical scheme provided by some embodiments of the application at least comprise:

when the scheme of the embodiment of the application is executed, the terminal initiates a VoLTE call flow in the 5G system, the terminal registers in the 5G system through an NSA mode, when the VoLTE call flow is determined to be failed in call, the connection of the 5G system is disconnected, a circuit domain call flow is initiated through a CSFB flow, when the circuit domain call flow is completed, pre-stored 5G registration information is obtained, and the 5G registration information is re-registered in the 5G system, so that the terminal can quickly re-establish the connection of the 5G system, the registration time of the 5G system is saved, and the communication experience of a user is improved.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic diagram of a communication system architecture provided in the present application;

fig. 2 is a schematic flowchart of a registration method of a 5G system according to an embodiment of the present disclosure;

fig. 3 is another schematic flowchart of a registration method of a 5G system according to an embodiment of the present disclosure;

fig. 4 is another schematic flowchart of a registration method of a 5G system according to an embodiment of the present disclosure;

fig. 5 is a schematic structural diagram of a registration method of a 5G system according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the application, as detailed in the appended claims.

In the description of the present application, it is to be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.

Fig. 1 is a schematic diagram of a communication system architecture provided in the present application.

Referring to fig. 1, the communication system includes a terminal 100, an LTE base station 110, an NR base station 120, a core network 130, a 3G base station 140, and a 2G base station 150. The LTE base station 110 may provide 4G network wireless access for one or more terminals 100 within a coverage area, so that the user terminals can communicate with each other; NR base station 120 may provide 5G network radio access for one or more terminals 100 within a coverage area to enable intercommunication among the user terminals; (ii) a The 3G base station 140 may provide 3G network wireless access for one or more terminals 100 within a coverage area, so that the user terminals can communicate with each other; the 2G base station 150 may provide 2G network radio access to one or more terminals 100 within the coverage area to enable the user terminals to communicate with each other. When the terminal carries out voice call, the VoLTE voice call can be carried out through a non-independent networking NSA mode, wherein the NSA mode is a dual-connection network mode of a 4G wireless access network and a 5G NR, namely a new wireless dual-connection framework of the 4G LTE and the 5G NR of the non-independent networking: in the NSA mode, the UE establishes a connection with a 4G core network, and uses radio resources of at least two different base stations (the 4G base station is a master station and the 5G NR base station is a slave station) at the same time, and transmits signaling by means of the 4G core network, and the 4G base station or the 5G NR base station transmits data traffic. In the NSA mode, the 5G NR base station accesses a 4G core network, and transmits signaling through the 4G core network, and the 4G base station or the 5G NR base station transmits data service; in the NSA mode of the terminal, the operator may share a 4G core network with 4G and 5G. The NSA mode is a transitional networking mode at the beginning of 5G construction. When the terminal cannot complete the VoLTE voice call through the non-independent networking NSA mode, the terminal disconnects the 5G network connection, falls back to the circuit domain through the CSFB procedure, registers to the 3G network through the 3G base station 140, and initiates the circuit domain call procedure based on the 3G network, or registers to the 2G network through the 2G base station 150, and initiates the circuit domain call procedure based on the 2G network.

The terminal 100 includes, but is not limited to, a Mobile Station (MS), a Mobile terminal device (Mobile terminal), a Mobile phone (Mobile Telephone), a handset (handset), a portable device (portable device), etc., and the terminal device may communicate with one or more core networks via a Radio Access Network (RAN), for example, the terminal device may be a Mobile phone (or referred to as a "cellular" phone), a computer with a wireless communication function, etc., and the terminal device may also be a portable, pocket, hand-held, computer-embedded or vehicle-mounted Mobile device or apparatus.

A base station, i.e. a public mobile communication base station, is an interface device for a mobile device to access the internet, and is a form of a radio station, which is a radio transceiver station for information transmission with a mobile phone terminal through a mobile communication switching center in a certain radio coverage area. The base station can also be called a base station system and consists of a plurality of independent base station devices, and a complete base station device also comprises a power supply, a storage battery, an air conditioner, security monitoring and other matched devices. The LTE Base station 110 mainly includes three parts, namely, a BBU (Building Base band Unit), an RRU (Radio Remote Unit), and a Radio frequency antenna, where the BBU is mainly responsible for signal modulation, the RRU is mainly responsible for Radio frequency processing, and the antenna is mainly responsible for conversion between cable uplink guided waves and spatial waves in the air. Compared with the LTE base station, the NR base station 120 combines an RRU and a radio frequency Antenna before the LTE base station into an AAU (Active Antenna Unit), and connects the AAU with a BBU through an optical fiber. The 2G base station 150 initially primarily employed the unitary base station architecture: the antenna of the base station is positioned on the iron tower, the rest part of the antenna is positioned in the machine room beside the base station, and the antenna is connected with the indoor machine room through the feeder line. The subsequent development is a distributed base station architecture, the distributed base station architecture divides the BTS into RRUs and BBUs, wherein the RRUs are mainly responsible for modules related to radio frequency, including 4 modules: the device comprises an intermediate frequency module, a transceiver module, a power amplifier and a filtering module. The BBU is mainly responsible for baseband processing, protocol stack processing and the like. The RRUs are located on the iron tower, the BBUs are located in an indoor machine room, each BBU can be connected with a plurality of (3-4) RRUs, and the BBUs are connected with the RRUs through optical fibers. The 3G base station 140 is basically consistent with the 2G base station, and mainly adopts a distributed base station architecture, which divides the Node B into two parts, namely BBU and RRU. According to the station type size and power of the base station, the base station can be divided into a Macro base station (Macro Site), a Micro base station (Micro Site), a Pico base station (Pico Site) and a Femto base station (Femto Site): the single carrier transmitting power of the macro base station is more than 10W, and the coverage radius is more than 200 meters; the single carrier transmitting power of the micro base station is 500mW to 10W, and the coverage radius is 50 meters to 200 meters; the single carrier transmitting power of the pico-base station is between 100mW and 500mW, and the coverage radius is between 20 meters and 50 meters; the single carrier transmission power of the femto base station is less than 100mW, and the coverage radius is between 10 meters and 20 meters.

The core network 130 is the most core part of the communication network, and is an information processing center, and generally, one core network can process data of thousands or tens of thousands of base stations, and is mainly responsible for processing and routing of data. The core network 130 can provide user connection, user management, and service bearer functions, and can serve as a bearer network to provide an interface to an external network; the establishment of user connection includes functions such as MM (Mobile Management), CM (Call Management), switching/routing, recording notification (connection relation to intelligent network peripheral equipment is completed by combining intelligent network service); the user management comprises user description, description of Quality of Service (Qos) of a user, user communication record (Accounting), VHE (Virtual Home Environment) provided by a session with an intelligent network platform, and security (corresponding security measures provided by an authentication center); the Service bearer includes PSTN (Public switched telephone Network) to the outside, external circuit data Network and packet data Network, Internet (Internet) and intranet (Intranets), and SMS (Short Message Service), etc.

In the following method embodiments, for convenience of description, only the main execution body of each step is described as a terminal.

The registration method of the 5G system provided in the embodiment of the present application will be described in detail below with reference to fig. 2 to 4.

Referring to fig. 2, a flowchart of a registration method of a 5G system is provided in an embodiment of the present application. The present embodiment is exemplified by applying a registration method of a 5G system to a terminal, where the registration method of the 5G system may include the following steps:

s201, the terminal initiates a VoLTE call flow under the 5G system.

The Voice over Long-Term Evolution (LTE) call flow refers to a high-definition Voice video call initiated based on an LTE (Long Term Evolution) network, and the Voice over LTE service is an Internet Protocol (IP) Voice service provided based on a packet domain.

Generally, a terminal supports an NSA mode, initiates a registration request to a 5G system, registers to the 5G system through the NSA mode, and acquires 5G registration information of the terminal and service capability information of the 5G system when the terminal successfully registers to the 5G system, where the 5G registration information includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of an LTE cell and the 5G cell, the service capability information of the 5G system refers to whether the terminal supports a VoLTE voice service, the terminal initiates 4G cell registration when registering to the 5G system, and the network informs the terminal whether the LTE network supports the VoLTE voice service when registering to the LTE cell. After the terminal successfully registers to the 5G system, the terminal initiates a VoLTE call flow through the 5G system.

The NSA mode is a dual connectivity network mode of a 4G radio access network and a 5G NR, i.e. a new wireless dual connectivity architecture of 4G LTE and 5GNR for non-independent networking: in the NSA mode, the UE establishes a connection with a 4G core network, and uses radio resources of at least two different base stations (the 4G base station is a master station and the 5G NR base station is a slave station) at the same time, and transmits signaling by means of the 4G core network, and the 4G base station or the 5G NR base station transmits data traffic. The main difference between the SA mode and the NSA mode is that the core network is accessed differently: in the NSA mode, the 5GNR base station is accessed to a 4G core network, signaling is transmitted through the 4G core network, and the 4G base station or the 5G NR base station transmits data service; in the NSA mode of the terminal, the operator may share a 4G core network with 4G and 5G. In the SA mode, the 5G NR base station directly accesses the 5G core network, transmits signaling through the 5G core network, and transmits data traffic through the 5G NR base station. The NSA mode is a transitional networking mode at the beginning of 5G construction.

S202, when determining that the VoLTE call flow fails, disconnecting the 5G system, and initiating a circuit domain call flow through the CSFB flow.

The CSFB (Circuit Switched Fallback) flow refers to a process of dropping a voice service to a Circuit domain through a CSFB technique. The CSFB technology is suitable for a scene of overlapping coverage of a 2G/3G circuit domain and a TD-LTE wireless network, the network structure is simple, and an IMS (IP Multimedia Subsystem) system does not need to be deployed. The circuit domain call flow refers to voice call initiated on the circuit domain based on the 2G/3G network.

Generally, when the LTE network signal quality of a terminal is poor, or when an abnormal condition exists in the terminal, a VoLTE call procedure initiated by the terminal may cause a call failure, the network state of the terminal needs to disconnect the network connection of the 5G system and fall back from a PS (Packet Switch) domain to a CS (Circuit Switch) domain, a CSFB procedure needs to be triggered during the Circuit fall back process of the terminal, the terminal starts to search for at least one 3G cell around, selects a target 3G cell from the at least one 3G cell as a 3G serving cell, registers to the 3G system based on the 3G serving cell and initiates a Circuit domain call procedure through the 3G system, searches for at least one 2G cell if the 3G system does not satisfy a first preset signal quality condition, selects a target 2G cell from the at least one 2G cell as a 2G serving cell, and registers to the 2G system based on the 2G serving cell, and initiating a circuit domain call flow through the 2G system, so that the terminal can complete a voice call flow in a 2G/3G network mode.

And S203, when the circuit domain call flow is completed, acquiring pre-stored 5G registration information, and re-registering to the 5G system based on the 5G registration information.

The 5G registration information refers to key information of the LTE network and the 5G network recorded when the terminal supporting the NSA mode is registered in the 5G system, and includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of the LTE cell and the 5G cell.

Generally, after a terminal completes a voice call through a circuit domain based on a 2G network or a 3G network, the terminal initiates a 5G network re-registration process, at this time, pre-stored 5G registration information is queried from a database, and based on the 5G registration information, network registration of a 4G cell and a 5G cell is directly initiated, so as to quickly recover the 5G network. If the terminal can not successfully register to the 5G network based on the 5G registration information prestored in the database, the terminal initiates full-channel scanning to register the 4G cell and the 5G cell respectively.

As can be seen from the above, the present disclosure provides a registration method of a 5G system, where a terminal initiates a VoLTE call flow in the 5G system, the terminal registers in the 5G system through an NSA mode, disconnects a connection of the 5G system when it is determined that a VoLTE call flow call fails, initiates a circuit domain call flow through a CSFB flow, and acquires pre-stored 5G registration information when the circuit domain call flow is completed, and re-registers in the 5G system based on the 5G registration information, so that the terminal can quickly re-establish a connection of the 5G system, save registration time of the 5G system, and improve communication experience of a user.

Referring to fig. 3, another flow chart of a registration method of a 5G system is provided in the embodiment of the present application. The present embodiment is exemplified by applying a registration method of a 5G system to a terminal supporting an NSA mode. The registration method of the 5G system can comprise the following steps:

s301, a registration request is initiated to the 5G system.

S302, when the terminal is successfully registered in the 5G system, the 5G registration information of the terminal is acquired.

Generally, when a terminal successfully registers in a 5G system, the 5G registration information of the terminal is acquired, which helps the terminal to inquire the 5G registration information from a database after the terminal subsequently disconnects a 5G network connection, and can quickly register in the 5G system based on the 5G registration information.

S303, the terminal initiates a VoLTE call flow under the 5G system.

The VoLTE call flow refers to high-definition voice video call initiated based on an LTE network, and the VoLTE voice service is an IP voice service provided based on a packet switched domain.

Generally, a terminal supports an NSA mode, initiates a registration request to a 5G system, registers to the 5G system through the NSA mode, and acquires 5G registration information of the terminal and service capability information of the 5G system when the terminal successfully registers to the 5G system, where the 5G registration information includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of an LTE cell and the 5G cell, the service capability information of the 5G system refers to a capability of whether the terminal supports a VoLTE voice service, the terminal initiates LTE cell registration when registering to the 5G system, and the network informs the terminal whether the LTE network supports the VoLTE voice service when registering to the LTE cell. After the terminal successfully registers to the 5G system, the terminal initiates a VoLTE call flow through the 5G system.

S304, acquiring the initiation time of the VoLTE call flow.

The initiating time refers to the initial time of the VoLTE call flow sent by the terminal, and based on the VoLTE call flow initiating time recorded by the terminal, the terminal can record the time length before the call success response corresponding to the VoLTE call flow is received, and then judges whether the VoLTE call flow is successfully called or not according to the time length.

S305, based on the initiation time, when the call success response corresponding to the VoLTE call flow is not received within the preset time, determining that the VoLTE call flow fails to call, and disconnecting the 5G system.

The preset duration refers to a preset duration of the VoLTE voice call waiting, and is used for measuring the success or failure of the VoLTE call process.

Generally, a terminal starts to record the time length from the initiation of a VoLTE call flow to the time when a call success response corresponding to the VoLTE call flow is received based on the initiation time of the VoLTE call flow, and when the time length is longer than a preset time, the call failure of the VoLTE call flow can be determined, at this time, the connection of a 5G system of the terminal is disconnected, and a circuit is prepared to fall back to a circuit domain of a 2G/3G network for voice call.

S306, at least one 3G cell is searched.

S307, a target 3G cell is selected from the at least one 3G cell as a 3G serving cell.

The target 3G cell is a 3G cell meeting a preset signal quality condition, the 3G service cell is an area where a terminal can currently obtain 3G network service, and is a cell divided from the whole 3G communication service area, and a 3G base station is arranged in the cell and is responsible for establishing wireless connection with the terminal in the cell, so that the 3G terminal can be supported to perform 3G communication in any cell in the 3G communication service area. The signal quality is a factor influencing the network transmission performance, the signal quality is influenced by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate and the like, and the preset signal quality condition is a signal quality condition which needs to be met by the 3G cell and is used for measuring the stability of data transmission of the 3G cell.

Generally, a terminal may search a plurality of 3G cells in the process of searching for a 3G cell, and in order to provide a stable network environment for the terminal and enable the terminal to smoothly complete a circuit domain call flow, a 3G cell meeting a preset signal quality condition needs to be selected from at least one 3G cell searched by the terminal as a 3G serving cell of the terminal.

And S308, registering to the 3G system based on the 3G service cell, and initiating a circuit domain call flow through the 3G system.

The circuit domain call flow refers to a voice call initiated on the circuit domain based on the 3G network, and initiates a circuit fall back through the CSFB flow, and the CSFB flow refers to a process of falling a voice service back to the circuit domain through the CSFB technique. The CSFB technology is suitable for a scene of overlapping coverage of a 2G/3G circuit domain and a TD-LTE wireless network, the network structure is simple, and an IMS system does not need to be deployed.

Generally, in the circuit fallback process of the terminal, a 3G cell with good signal quality is searched and found to serve as a 3G serving cell of the terminal, and the terminal registers to the 3G system through the 3G serving cell, so that the terminal can initiate a circuit domain call flow through the 3G system.

S309, when the 3G system is determined not to meet the first preset signal quality condition, searching at least one 2G cell.

The first preset signal quality condition is a signal quality condition that the 3G cell needs to satisfy, and is used for measuring the stability of data transmission of the 3G cell. Signal quality is a factor that affects network transmission performance, and is affected by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate, and the like.

Generally, a 3G cell searched and selected by a terminal is a 3G cell satisfying a preset signal quality condition, so that the terminal can complete a circuit domain call flow in a stable network environment, and if none of the 3G cells searched by the terminal satisfies the preset signal quality condition, the terminal will start a 2G cell search flow and select a 2G cell providing a stable network environment to initiate a circuit domain call flow.

S310, a target 2G cell is selected from the at least one 2G cell as a 2G serving cell.

The target 2G cell is a 2G cell meeting a preset signal quality condition, the 2G service cell is an area where the terminal can currently obtain 2G network service, and is a cell divided from the whole 2G communication service area, and a 2G base station is arranged in the cell and is responsible for establishing wireless connection with the terminal in the cell, so that the 2G terminal can carry out 2G communication in any cell in the 2G communication service area. The signal quality is a factor influencing the network transmission performance, the signal quality is influenced by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate and the like, and the preset signal quality condition is a signal quality condition which needs to be met by the 2G cell and is used for measuring the stability of data transmission of the 2G cell.

Generally, a terminal may search a plurality of 2G cells in the process of searching for a 2G cell, and in order to provide a stable network environment for the terminal and enable the terminal to smoothly complete a circuit domain call flow, a 2G cell meeting a preset signal quality condition needs to be selected from at least one 2G cell searched by the terminal as a 2G serving cell of the terminal.

S311, based on 2G service cell, registering to 2G system, and initiating circuit domain call flow through 2G system.

The circuit domain call flow refers to a voice call initiated on the circuit domain based on the 2G network, and initiates a circuit fall back through the CSFB flow, and the CSFB flow refers to a process of falling a voice service back to the circuit domain through the CSFB technique. The CSFB technology is suitable for a scene of overlapping coverage of a 2G/3G circuit domain and a TD-LTE wireless network, the network structure is simple, and an IMS system does not need to be deployed.

Generally, in the circuit fallback process of the terminal, a 2G cell with good signal quality is searched and found to serve as a 2G serving cell of the terminal, and the terminal registers to the 2G system through the 2G serving cell, so that the terminal can initiate a circuit domain call flow through the 2G system.

S312, when the circuit domain call flow is completed, pre-stored 5G registration information is obtained, and 5G registration information is re-registered to the 5G system based on the 5G registration information

Generally, after a terminal completes a voice call through a circuit domain based on a 2G network or a 3G network, the terminal may initiate a 5G network re-registration process, and at this time, pre-stored 5G registration information may be queried from a database, where the pre-stored 5G registration information includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of an LTE cell and a 5G cell. Based on the 5G registration information, network registration of the LTE cell and the 5G cell is directly initiated, so that the 5G network is quickly recovered. If the terminal cannot successfully register to the 5G network based on the 5G registration information prestored in the database, the terminal initiates full-channel scanning to register the LTE cell and the 5G cell respectively.

S313, when it is determined that the 5G system does not satisfy the second preset signal quality condition, respectively searching for at least one LTE cell and at least one 5G cell that support the NSA mode around.

The second preset signal quality condition refers to a signal quality condition that the 5G network needs to meet, and includes signal quality conditions of the LTE cell and the 5G cell, and is used for measuring stability of data transmission of the LTE cell and the 5G cell. Signal quality is a factor that affects network transmission performance, and is affected by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate, and the like.

Generally, after a terminal registers in a 5G system through 5G registration information pre-stored in a database, if the terminal detects that the current 5G system does not satisfy a second preset signal quality condition and cannot provide stable 5G network service to the terminal, the terminal analyzes signal qualities of a current LTE cell and a current 5G cell; if the current LTE cell of the terminal does not meet the preset signal quality condition, the terminal searches at least one LTE cell around again and selects the LTE cell meeting the preset signal quality condition as the LTE service cell of the terminal; if the current 5G cell of the terminal does not meet the preset signal quality condition, the terminal searches at least one 5G cell around again, and selects the 5G cell meeting the preset signal quality condition as a 5G service cell of the terminal; if the current LTE cell and the current 5G cell of the terminal do not meet the preset signal quality condition, the terminal searches at least one LTE cell around again, selects the LTE cell meeting the preset signal quality condition as the LTE service cell of the terminal, searches the 5G cell, selects the 5G cell meeting the preset signal quality condition from the searched 5G cells based on the LTE service cell as the 5G service cell of the terminal, and supports the NSA mode in the double connection of the 5G service cell and the LTE service cell, so that the terminal can obtain a stable 5G network environment.

And S314, determining a target LTE cell and a target 5G cell with good signal quality from the at least one LTE cell and the at least one 5G cell supporting the NSA mode.

The target LTE cell is a 4G cell meeting preset signal quality conditions, an area where a terminal can obtain 4G network service currently is a cell divided from the whole 4G communication service area, a 4G base station is arranged in the cell and is responsible for establishing wireless connection with the terminal in the cell, and the terminal supporting 4G can carry out 4G communication in any cell in the 4G communication service area. The signal quality is a factor influencing the network transmission performance, the signal quality is influenced by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate and the like, and the preset signal quality condition is a signal quality condition which needs to be met by the 4G cell and is used for measuring the stability of data transmission of the 4G cell. The target 5G cell is a 5G cell meeting a preset signal quality condition, is an area where a terminal can currently obtain 5G network service, and is a cell divided from the whole 5G communication service area, wherein a 5G base station is arranged in the cell and is responsible for establishing wireless connection with the terminal in the cell, and the terminal supporting 5G can perform 5G communication in any cell in the 5G communication service area. The signal quality is a factor influencing the network transmission performance, the signal quality is influenced by channel capacity, channel bandwidth, signal-to-noise ratio, bit error rate and the like, and the preset signal quality condition is a signal quality condition which needs to be met by the 5G cell and is used for measuring the stability of data transmission of the 5G cell.

And S315, registering to the 5G system based on the target LTE cell and the target 5G cell.

Generally, the target LTE cell and the target 5G cell are both cells satisfying a preset signal quality condition, and support the NSA mode under a combination of the target LTE cell and the target 5G cell, so that the terminal can register to the 5G system in the NSA mode and obtain a stable network environment.

As can be seen from the above, in the registration method of the 5G system provided in this scheme, a terminal initiates a registration request to the 5G system, and when successfully registering to the 5G system, acquires 5G registration information of the terminal, the terminal initiates a VoLTE call flow under the 5G system, acquires an initiation time of the VoLTE call flow, determines that a VoLTE call flow call failure is not received within a preset time period based on the initiation time, and disconnects a connection of the 5G system, searches for at least one 3G cell, selects a target 3G cell from the at least one 3G cell as a 3G serving cell, registers to the 3G system based on the 3G serving cell, and initiates a circuit domain call flow through the 3G system, and when it is determined that the 3G system does not satisfy a first preset signal quality condition, searches for the at least one 2G cell, selects a target 2G cell from the at least one 2G cell as a 2G serving cell, registering to a 2G system based on a 2G service cell, initiating a circuit domain call flow through the 2G system, acquiring prestored 5G registration information when the circuit domain call flow is completed, re-registering to the 5G system based on the 5G registration information, respectively searching at least one LTE cell and at least one 5G cell which support an NSA mode around when the 5G system is determined not to meet a second preset signal quality condition, determining a target LTE cell and a target 5G cell with good signal quality from the at least one LTE cell and the at least one 5G cell which support the NSA mode, and registering to the 5G system based on the target LTE cell and the target 5G cell. By the method, the terminal can quickly reestablish stable 5G network connection after completing the voice call flow through the circuit domain, thereby saving the registration time of the 5G system and improving the communication experience of users.

Referring to fig. 4, another flow chart of a registration method of a 5G system is provided in the embodiment of the present application. The present embodiment is exemplified by applying a registration method of a 5G system to a terminal supporting an NSA mode. The registration method of the 5G system can comprise the following steps:

s401, a registration request is initiated to the 5G system.

S402, when successfully registering to the 5G system, acquiring the 5G registration information of the terminal, and acquiring the service capability information of the 5G system.

The 5G registration information refers to key information of the LTE network and the 5G network recorded when the terminal supporting the NSA mode is registered in the 5G system, and includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of the LTE cell and the 5G cell. The service capability information of the 5G system refers to the capability of whether the terminal supports the VoLTE voice service, the terminal initiates LTE cell registration when registering the 5G system, and the network informs the terminal whether the LTE network supports the VoLTE voice service when registering the LTE cell.

Generally, when a terminal is successfully registered in a 5G system, the 5G registration information of the terminal is acquired, which helps the terminal to inquire the 5G registration information from a database after the terminal subsequently disconnects a 5G network connection, and can be quickly registered in the 5G system based on the 5G registration information, and meanwhile, the service capability information of the 5G system is also acquired, so as to determine whether the terminal can initiate a VoLTE call flow under the current 5G system.

And S403, the terminal initiates a VoLTE call flow under the 5G system.

Generally, a terminal supports an NSA mode, initiates a registration request to a 5G system, registers to the 5G system through the NSA mode, and acquires 5G registration information of the terminal and service capability information of the 5G system when the terminal successfully registers to the 5G system, where the 5G registration information includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of an LTE cell and the 5G cell, the service capability information of the 5G system refers to whether the terminal supports a VoLTE voice service, the terminal initiates 4G cell registration when registering to the 5G system, and the network informs the terminal whether the LTE network supports the VoLTE voice service when registering to the 4G cell. After the terminal successfully registers to the 5G system, the terminal initiates a VoLTE call flow through the 5G system.

S404, when the LTE network is judged not to support the VoLTE service based on the service capability information, determining that the VoLTE call flow call fails, and disconnecting the 5G system.

Generally, whether a terminal supports a VoLTE voice service or not can be known by analyzing service capability information of a 5G system, LTE cell registration can be initiated when the terminal registers the 5G system, and a network can inform the terminal whether the LTE network supports the VoLTE voice service or not when the LTE cell registration is performed. When the LTE network under the current 5G system does not support the VoLTE service, the VoLTE call flow call failure initiated by the terminal can be determined, and the connection of the current 5G system needs to be disconnected, so that the terminal falls back to the circuit domain to initiate the circuit domain call flow.

S405, at least one 3G cell is searched.

S406, selecting a target 3G cell from the at least one 3G cell as a 3G serving cell.

S407, registering to the 3G system based on the 3G service cell, and initiating a circuit domain call flow through the 3G system.

And S408, searching at least one 2G cell when the 3G system is determined not to meet the first preset signal quality condition.

S409, selecting a target 2G cell from the at least one 2G cell as a 2G serving cell.

And S410, registering to the 2G system based on the 2G service cell, and initiating a circuit domain call flow through the 2G system.

S411, when the circuit domain call flow is completed, obtaining the pre-stored 5G registration information, and re-registering to the 5G system based on the 5G registration information

Generally, after a terminal completes a voice call through a circuit domain based on a 2G network or a 3G network, the terminal may initiate a 5G network re-registration process, and at this time, pre-stored 5G registration information may be queried from a database, where the pre-stored 5G registration information includes one or more of frequency point information, bandwidth information, PCI information, and cell configuration information of an LTE cell and a 5G cell. And directly initiating network registration of the 4G cell and the 5G cell based on the 5G registration information, thereby quickly recovering the 5G network. If the terminal can not successfully register to the 5G network based on the 5G registration information prestored in the database, the terminal initiates full-channel scanning to register the 4G cell and the 5G cell respectively.

And S412, when it is determined that the 5G system does not satisfy the second preset signal quality condition, respectively searching at least one LTE cell and at least one 5G cell which support the NSA mode around.

S413, determining a target LTE cell and a target 5G cell with good signal quality from the at least one LTE cell and the at least one 5G cell supporting the NSA mode.

And S414, registering to the 5G system based on the target LTE cell and the target 5G cell.

As can be seen from the above, in the registration method of the 5G system provided in this embodiment, a terminal initiates a registration request to the 5G system, acquires 5G registration information of the terminal and service capability information of the 5G system when successfully registering to the 5G system, the terminal initiates a VoLTE call flow in the 5G system, determines that the VoLTE call flow call fails when it is determined that the LTE network does not support the VoLTE service based on the service capability information, disconnects the 5G system, searches for at least one 3G cell, selects a target 3G cell from the at least one 3G cell as a 3G serving cell, registers to the 3G system based on the 3G serving cell and initiates a circuit domain call flow through the 3G system, searches for the at least one 2G cell when it is determined that the 3G system does not satisfy a first preset signal quality condition, selects a target 2G cell from the at least one 2G cell as a 2G serving cell, registering to a 2G system based on a 2G service cell, initiating a circuit domain call flow through the 2G system, acquiring prestored 5G registration information when the circuit domain call flow is completed, re-registering to the 5G system based on the 5G registration information, searching at least one LTE cell and at least one 5G cell which support an NSA mode around respectively when the 5G system is determined not to meet a preset second signal quality condition, determining a target LTE cell and a target 5G cell which have good signal quality from the at least one LTE cell and the at least one 5G cell which support the NSA mode, and registering to the 5G system based on the target LTE cell and the target 5G cell. By the method, the terminal can quickly reestablish stable 5G network connection after completing the voice call flow through the circuit domain, thereby saving the registration time of the 5G system and improving the communication experience of users.

The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

Referring to fig. 5, a schematic structural diagram of a registration apparatus of a 5G system provided in an exemplary embodiment of the present application is shown, which is hereinafter referred to as an apparatus 5. The apparatus 5 may be implemented as all or part of a terminal by software, hardware or a combination of both. The device 5 is applied to a terminal supporting a non-independent networking, NSA, mode, and the device 5 comprises:

a calling module 501, configured to initiate a VoLTE call flow in a 5G system by a terminal; the terminal is registered to the 5G system through the NSA mode;

a processing module 502, configured to disconnect a 5G system when it is determined that the VoLTE call flow fails, and initiate a circuit switched domain call flow through a CSFB flow;

the registering module 503 is configured to, when the circuit domain call flow is completed, acquire pre-stored 5G registration information, and re-register to the 5G system based on the 5G registration information.

Optionally, the apparatus 5 further includes:

a request unit, configured to initiate a registration request to the 5G system;

the first acquisition unit is used for acquiring 5G registration information of the terminal when the terminal is successfully registered in the 5G system; the 5G registration information comprises one or more of frequency point information, bandwidth information, PCI information and cell configuration information of an LTE cell and a 5G cell.

Optionally, the processing module 502 includes:

a first search unit for searching for at least one 3G cell;

a first selecting unit, configured to select a target 3G cell from the at least one 3G cell as a 3G serving cell;

and the first processing unit is used for registering to a 3G system based on the 3G service cell and initiating the circuit domain call flow through the 3G system.

Optionally, the processing module 502 further includes:

the second searching unit is used for searching at least one 2G cell when the 3G system is determined not to meet the first preset signal quality condition;

a second selecting unit, configured to select a target 2G cell from the at least one 2G cell as a 2G serving cell;

and the second processing unit is used for registering to a 2G system based on the 2G service cell and initiating the circuit domain call flow through the 2G system.

Optionally, the processing module 502 includes:

a second obtaining unit, configured to obtain an initiation time of the VoLTE call flow;

a first determining unit, configured to determine that the call of the VoLTE call flow fails when a call success response corresponding to the VoLTE call flow is not received within a preset time period based on the initiating time.

Optionally, the processing module 502 includes:

the third obtaining unit is used for obtaining the service capability information of the 5G system when the 5G system is successfully registered;

and the second determining unit is used for determining that the VoLTE call flow call fails when the LTE network is judged not to support the VoLTE service based on the service capability information.

Optionally, the registration module 503 further includes:

the third searching unit is used for respectively searching at least one LTE cell and at least one 5G cell which support the NSA mode when the 5G system is determined not to meet the preset second signal quality condition;

a third determining unit, configured to determine a target LTE cell and a target 5G cell with good signal quality from the at least one LTE cell and the at least one 5G cell supporting the NSA mode;

a registering unit, configured to register to the 5G system based on the target LTE cell and the target 5G cell.

It should be noted that, when the registration apparatus of the 5G system provided in the foregoing embodiment executes the registration method of the 5G system, only the division of the functional modules is taken as an example, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules, so as to complete all or part of the functions described above. In addition, the registration apparatus of the 5G system and the registration method embodiment of the 5G system provided in the above embodiments belong to the same concept, and details of the implementation process are referred to in the method embodiment, which are not described herein again.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

An embodiment of the present application further provides a computer storage medium, where the computer storage medium may store a plurality of instructions, where the instructions are suitable for being loaded by a processor and executing the above method steps, and a specific execution process may refer to specific descriptions of the embodiments shown in fig. 2 to fig. 4, which are not described herein again.

The application also provides a terminal, which comprises a processor and a memory; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the above-mentioned method steps.

Referring to fig. 6, a schematic structural diagram of a terminal according to an embodiment of the present application is shown, where the terminal may be used to implement the registration method of the 5G system in the foregoing embodiment. Specifically, the method comprises the following steps:

the memory 603 may be used to store software programs and modules, and the processor 600 executes various functional applications and data processing by operating the software programs and modules stored in the memory 603. The memory 603 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal device, and the like. Further, the memory 603 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 603 may also include a memory controller to provide the processor 600 and the input unit 605 access to the memory 603.

The input unit 605 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, input unit 605 may include a touch-sensitive surface 606 (e.g., a touch screen, a touchpad, or a touch frame). The touch-sensitive surface 606, also referred to as a touch display screen or a touch pad, may collect touch operations by a user on or near the touch-sensitive surface 606 (e.g., operations by a user on or near the touch-sensitive surface 606 using a finger, a stylus, or any other suitable object or attachment) and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 606 may comprise both touch sensing devices and touch controllers. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 600, and can receive and execute commands sent by the processor 600. Additionally, the touch-sensitive surface 606 may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves.

The display unit 613 may be used to display information input by or provided to the user and various graphical user interfaces of the terminal device, which may be made up of graphics, text, icons, video, and any combination thereof. The Display unit 613 may include a Display panel 614, and optionally, the Display panel 614 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, the touch-sensitive surface 606 may overlay the display panel 614, and when a touch operation is detected on or near the touch-sensitive surface 606, the touch operation is transmitted to the processor 600 to determine the type of touch event, and then the processor 600 provides a corresponding visual output on the display panel 614 according to the type of touch event. Although in FIG. 6, the touch-sensitive surface 606 and the display panel 614 are two separate components to implement input and output functions, in some embodiments, the touch-sensitive surface 606 may be integrated with the display panel 614 to implement input and output functions.

The processor 600 is a control center of the terminal device, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or executing software programs and/or modules stored in the memory 603 and calling data stored in the memory 603, thereby performing overall monitoring of the terminal device. Optionally, processor 600 may include one or more processing cores; processor 600 may integrate an application processor that handles operating system, user interface, application programs, etc., and a modem processor that handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 600.

Specifically, in this embodiment, the display unit of the terminal device is a touch screen display, the terminal device further includes a memory, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include steps for implementing the registration method of the 5G system.

In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described device embodiments are merely illustrative, for example, the division of the unit is only a logical functional division, and there may be other division ways in actual implementation, such as: multiple units or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented. In addition, the coupling, direct coupling or communication connection between the components shown or discussed may be through some interfaces, and the indirect coupling or communication connection between the devices or units may be electrical, mechanical or other forms.

All functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may be separately regarded as one unit, or two or more units may be integrated into one unit; the integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A registration method of a 5G system is characterized in that the method is applied to a terminal supporting a non-independent Networking (NSA) mode, and the method comprises the following steps:

2. The method of claim 1, wherein before the terminal initiates the VoLTE call flow under the 5G system, the method further comprises:

initiating a registration request to the 5G system;

when the terminal is successfully registered in the 5G system, acquiring 5G registration information of the terminal; the 5G registration information comprises one or more of frequency point information, bandwidth information, PCI information and cell configuration information of an LTE cell and a 5G cell.

3. The method of claim 1, wherein initiating the circuit switched domain call procedure via the CSFB procedure comprises:

searching for at least one 3G cell;

selecting a target 3G cell from the at least one 3G cell as a 3G serving cell;

and registering to a 3G system based on the 3G service cell, and initiating the circuit domain call flow through the 3G system.

4. The method of claim 3, further comprising:

searching at least one 2G cell when the 3G system is determined not to meet a first preset signal quality condition;

selecting a target 2G cell from the at least one 2G cell as a 2G serving cell;

and registering to a 2G system based on the 2G service cell, and initiating the circuit domain call flow through the 2G system.

5. The method of claim 1, wherein the determining that the VoLTE call flow call fails comprises:

acquiring the initiation time of the VoLTE call flow;

and determining that the VoLTE call flow call fails when a call success response corresponding to the VoLTE call flow is not received within a preset time length based on the initiating time.

6. The method of claim 1, wherein the determining that the VoLTE call flow call fails comprises:

when successfully registering to the 5G system, acquiring service capability information of the 5G system;

and determining that the VoLTE call flow call fails when the LTE network is judged not to support the VoLTE service based on the service capability information.

7. The method of claim 1, wherein after obtaining pre-stored 5G registration information when the circuit domain call flow is completed, and re-registering to a 5G system based on the 5G registration information, the method further comprises:

when the 5G system is determined not to meet the preset second signal quality condition, searching at least one LTE cell and at least one 5G cell which support the NSA mode around respectively;

determining a target LTE cell and a target 5G cell with good signal quality from the at least one LTE cell and the at least one 5G cell supporting the NSA mode;

registering with a 5G system based on the target LTE cell and the target 5G cell.

8. A registration apparatus of a 5G system, the apparatus being applied to a terminal supporting a non-independent Networking (NSA) mode, the apparatus comprising:

9. A computer storage medium, characterized in that it stores a plurality of instructions adapted to be loaded by a processor and to carry out the method steps according to any one of claims 1 to 7.

10. A terminal, comprising: the system comprises a processor, a memory and a display screen; wherein the memory stores a computer program adapted to be loaded by the processor and to perform the method steps of any of claims 1 to 7.