CN113810990A

CN113810990A - Communication method and device

Info

Publication number: CN113810990A
Application number: CN202111118316.7A
Authority: CN
Inventors: 冯志国; 孙晓强
Original assignee: Quectel Wireless Solutions Co Ltd
Current assignee: Quectel Wireless Solutions Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2021-12-17
Anticipated expiration: 2041-09-23
Also published as: CN113810990B

Abstract

The application provides a communication method and a device, wherein the communication method comprises the following steps: acquiring first information, wherein the first information is used for indicating a Public Land Mobile Network (PLMN) of a current network; judging whether the network of the first system of the PLMN already exits the network; under the condition that the network of the first system of the PLMN is already disconnected, configuring a first field in a first attachment request as a center by taking data; and sending the first attachment request for network registration. The embodiment of the application can meet the requirement that an operator has to use voice as a center for voice equipment, and meanwhile, the terminal equipment can normally use data services and voice services, so that the network experience of the voice equipment is improved.

Description

Communication method and device

Technical Field

The present application relates to the field of communications, and more particularly, to a communication method and apparatus.

Background

With the gradual commercialization of 5G technologies, operators began to gradually move away from the 2G/3G network (sunset). It is clear from the 3GPP protocol that a terminal device configured with a voice-centric (voice center) must acquire a voice (voice) service on a registered network, otherwise, a network that temporarily disables (block) a current Radio Access Technology (RAT) needs to search for another network to acquire the voice service.

If the terminal device does not open an IP Multimedia Subsystem (IMS) function, or a used Subscriber Identity Module (SIM) does not open a voice service based on the current RAT, or a voice center configured terminal device roams to a network in which 2/3G has quitted, the terminal device may appear to camp on the network of the current RAT and cannot search for the 2/3G network to be disconnected, resulting in that the whole terminal device cannot be used.

Therefore, a solution is needed to solve the unusable situation when the terminal device registers in the network that has been submitted.

Disclosure of Invention

The application provides a communication method and a communication device, which can meet the requirement that an operator has to use voice as a center for voice equipment, and simultaneously ensure that terminal equipment can normally use data services and voice services, thereby improving the network experience of the voice equipment.

In a first aspect, a communication method is provided, including:

acquiring first information, wherein the first information is used for indicating a Public Land Mobile Network (PLMN) of a current network;

judging whether the network of the first system of the PLMN already exits the network;

under the condition that the network of the first system of the PLMN is already disconnected, configuring a first field in a first attachment request as a center by taking data;

and sending the first attachment request for network registration.

In a second aspect, a communication apparatus is provided, including:

a transceiver unit, configured to acquire first information, where the first information is used to indicate a public land mobile network PLMN of a current network;

the processing unit is used for judging whether the network of the first system of the PLMN already exits the network;

the processing unit is further configured to configure a first field in the first attach request as a data center when the network of the first system of the PLMN has quit;

the transceiver unit is further configured to send the first attach request for network registration.

In a third aspect, a communication apparatus is provided, the apparatus comprising: a processor and a transceiver, optionally the device may also include a memory and a bus system. Wherein the transceiver, the memory and the processor are connected by the bus system, the memory is used for storing instructions, the processor is used for executing instructions, such as executing instructions stored by the memory, to control the transceiver to receive and/or transmit signals, and when the processor executes instructions, such as executing instructions stored by the memory, the execution causes the processor or the communication device to execute the method in the implementation mode of any one of the above aspects.

In a fourth aspect, a computer-readable medium is provided for storing a computer program comprising instructions for performing the method in any possible implementation of the first aspect described above.

In a fifth aspect, there is provided a computer program product comprising: computer program code which, when run by a communication device, causes the communication device to perform the method of any possible implementation of the first aspect described above.

In a sixth aspect, a chip is provided, which is applicable to a communication device, and which comprises at least one processor, and when the at least one processor executes instructions, causes the chip or the communication device to perform the method in any possible implementation manner of the first aspect, and which may further comprise a memory, and the memory may be used to store the instructions involved.

According to the embodiment of the application, under the condition that the network of the first system of the current serving PLMN is disconnected, the field in the attachment request is configured to be data-centered for network registration, so that the requirement that an operator needs to be voice-centered for voice equipment can be met, meanwhile, the terminal equipment can normally use data services and voice services, and the network experience of the voice equipment is improved.

Drawings

FIG. 1 is a schematic diagram of a communication system suitable for use with embodiments of the present application;

fig. 2 is a schematic flow chart of a communication method provided by an embodiment of the present application;

fig. 3 is a schematic flow chart of another communication method provided by an embodiment of the present application;

FIG. 4 is a schematic block diagram of a communications device of an embodiment of the present application;

fig. 5 is a schematic block diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

The technical scheme of the embodiment of the application can be applied to various communication systems, for example: a global system for mobile communications (GSM) system, a Code Division Multiple Access (CDMA) system, a Wideband Code Division Multiple Access (WCDMA) system, a General Packet Radio Service (GPRS), a Long Term Evolution (LTE) system, a LTE Frequency Division Duplex (FDD) system, a LTE Time Division Duplex (TDD), a universal mobile telecommunications system (universal mobile telecommunications system, UMTS), a Worldwide Interoperability for Microwave Access (WiMAX) communication system, a fifth generation (5G) or a new radio NR (NR) system, and the like.

For the understanding of the embodiments of the present application, a communication system suitable for the embodiments of the present application will be described in detail with reference to fig. 1.

Fig. 1 shows a schematic diagram of a communication system 100 suitable for the method and apparatus for cell activation according to the embodiment of the present application. As shown in fig. 1, the communication system 100 may include a network device, such as the network device 110 shown in fig. 1; the communication system 100 may also include at least one terminal device, such as the terminal device 120 shown in fig. 1. Network device 110 and terminal device 120 may communicate via a wireless link.

Each communication device, such as network device 110 or terminal device 120 in fig. 1, may be configured with multiple antennas. The plurality of antennas may include at least one transmit antenna for transmitting signals and at least one receive antenna for receiving signals. Additionally, each communication device can additionally include a transmitter chain and a receiver chain, each of which can comprise a plurality of components associated with signal transmission and reception (e.g., processors, modulators, multiplexers, demodulators, demultiplexers, antennas, etc.), as will be appreciated by one skilled in the art. Therefore, the network equipment and the terminal equipment can communicate through the multi-antenna technology.

It should be understood that the network device in the wireless communication system may be any device having a wireless transceiving function. Such devices include, but are not limited to: evolved Node B (eNB), Radio Network Controller (RNC), Node B (NB), Base Station Controller (BSC), Base Transceiver Station (BTS), Home Base Station (e.g., Home evolved NodeB, or Home Node B, HNB), BaseBand Unit (Base band Unit, BBU), wireless relay Node, wireless backhaul Node, Transmission Point (TP), or Transmission and Reception Point (TRP), etc., and may also be 5G, such as NR, gNB in the system, or, a transmission point (TRP or TP), one or a group (including multiple antenna panels) of antenna panels of a base station in a 5G system, alternatively, it may also be a network node forming a gNB or a transmission point, such as a baseband unit (BBU), or a Distributed Unit (DU).

It should also be understood that terminal equipment in the wireless communication system may also be referred to as User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a user terminal, a wireless communication device, a user agent, or a user equipment. The terminal device in the embodiment of the present application may be a mobile phone (mobile phone), a tablet computer (pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), and the like. The embodiments of the present application do not limit the application scenarios.

In the embodiment of the application, the terminal device is registered only in an LTE or NR system, and the 2/3G network in the LTE or NR system is already quitted. And when the terminal equipment is resident in the network of the current RAT and cannot search 2/3G network, the terminal equipment is disconnected. When the timer (for example, the T3402 timer) is over, the terminal device may search for the network again, and such a cycle finally causes the terminal device to be unavailable, which affects the user experience of the user.

In view of this, embodiments of the present application provide a communication method and apparatus, where a field in an attach request is configured to perform network registration by using data as a center when a network of a first standard of a currently serving PLMN has quitted, so that a requirement that an operator has to use voice as a center for a voice device can be met, and meanwhile, it is ensured that a terminal device can normally use a data service and a voice service, thereby improving network experience of the voice device. The first standard may be, for example and without limitation, 2/3G.

Fig. 2 is a schematic flow chart of a communication method 200 according to an embodiment of the present application. The method may be performed by the terminal device, or a chip or a circuit configured in the terminal device. As shown in fig. 2, method 200 includes steps 210 through 240.

210, first information is obtained, where the first information is used to indicate a public land mobile network PLMN of a current network.

For example, after the terminal device is powered on, the terminal radio frequency may be swept. After the network signal is obtained by frequency sweeping, the terminal equipment can read the system information, wherein the system information carries the network information. As an example, a System Information Block (SIB) in the System message may carry first Information, which may be used to indicate a PLMN of a current network. The RRC layer may then report network information to a Non-access stratum (NAS) layer, which triggers the registration process.

And 220, judging whether the network of the first system of the PLMN already quits the network.

For example, it may be determined by the NAS layer whether the network of the first standard of the PLMN of the current network determined in step 210 has exited (sunset). In some optional embodiments, the step 220 may be implemented by adding a judging module in an Enhanced Mobile Management (EMM) layer in the NAS layer.

For example, the first standard may be 2/3G. In other words, the PLMN network may be an lte (lte only) network, or an nr (nr only) network. In some optional embodiments, for example, after a 5G NR network is commercially available in a large scale, the first standard may also refer to 4G, which is not limited in this application.

In some alternative embodiments, a network-dropped PLMN list (sunset PLMN list) may be established, which includes at least one PLMN whose network of the first system has dropped. Illustratively, the default off-network PLMN is hard coded (hard code), i.e., may be implemented by a code, such as 46011 in China Telecommunications (CT), 311480 in wilson telecommunications (VZW) in the united states, 310410 in telephone and telegraph corporation (AT & T) in japan, 440050 in KDDI in japan, and the like, without limitation.

The PLMN list may be established by AT command, as an example. For example, a network quit PLMN file (sunset PLMN file) may be created in the file system, and the file may be read each time the terminal device is turned on, and information corresponding to the file is synchronously copied to the global variable. AT the same time, the off-network PLMN list may be configured using AT commands and synchronized to global variables. Meanwhile, the synchronization is updated to the sunset PLMN file to keep the information synchronized. At this time, the network quitting PLMN list of the global variable may be used by the EMM layer to determine whether the network of the first system of the currently serving PLMN has quitted.

When the PLMN is in the network quitting PLMN list, determining that the network of the first system of the PLMN already quits the network; and when the PLMN is not in the network quitting PLMN list, determining that the network of the first system of the PLMN does not quit the network.

In some optional embodiments, the network-quit PLMN list may also be updated. For example, a command may be used to add a PLMN of the first system that the network has dropped to the dropped-network PLMN list. For example, the command may be a command for a user to manually input an update, or a command for the terminal device to invoke an AT in a program to update, which is not limited in the present application.

And 230, configuring a first field in the first attach request as data center when the network of the first system of the PLMN is already disconnected.

For example, when the currently serving PLMN is in the off-network PLMN list, data centric (data centric) may be used for network registration. As a specific implementation manner, at this time, it may be further determined whether the data centralized configuration is in a common setting (ue _ use _ setting) in the attach request (attach request) of the terminal device. If so, the ue _ use _ setting can be used for registration, for example, an attach request configured as a data center by the ue _ use _ setting is sent for registration. If not, namely the ue _ use _ setting is configured as the voice center, the configuration of the ue _ use _ setting needs to be modified to be the data center by the voice center. Thus, the terminal device can dynamically configure the voice centroric and the data centroric to meet the operator's requirement that the voice device must be the voice centroric.

In some optional embodiments of the present application, second information for marking a default configuration of the first field to be voice-centric may also be determined. For example, while step 230 is executed, i.e., the configuration of ue _ use _ setting is modified from voice center to data center, the default configuration of ue _ use _ setting may be marked by the second information as voice center. In this way, when the terminal device of the voice center roams to other non-3G sunset networks, the configuration of the voice center can be continuously used, thereby satisfying the requirement of the operator.

And 240, sending the first attachment request to perform network registration.

Since the ue _ use _ setting in the first attach request is configured as a data center, the terminal device may be able to normally use data in an 4/5G network, such as an LTE network or an NR network. After the terminal device acquires a voice service based on the current RAT, for example, a Voice Over LTE (VOLTE) service, the voice service can be normally used.

Therefore, in the embodiment of the application, when the network of the first system of the currently serving PLMN has quit, the field in the attach request is configured to be data-centric for network registration, so that the requirement that an operator must center on voice for the voice device can be met, and meanwhile, the terminal device can be ensured to normally use the data service and the voice service, thereby improving the network experience of the voice device.

In some optional embodiments, in a case that the network of the first system of the currently serving PLMN is not dropped, a second attach request is sent to perform network registration configuration, where a second field of the second attach request is a default configuration of an operator.

For example, when the currently serving PLMN is not in the fallback PLMN list, network registration may be performed using operator default configuration. For example, when the operator's ue _ use _ setting is configured as a data center by default, network registration is performed with the data center, and when the operator's ue _ use _ setting is configured as a voice center by default, network registration is performed with the voice center. For another example, when the ue _ use _ setting of the operator is configured as the data center by default, but the current ue _ use _ setting is configured as the voice center, the voice center may modify the ue _ use _ setting into the default configuration data voice to register; when the ue _ use _ setting of the operator is configured as the voice center by default, but the current ue _ use _ setting is configured as the data center, the data center can modify the default configuration to the voice center for registration.

Fig. 3 is a schematic flow chart diagram of another communication method 300 provided in an embodiment of the present application. The method 300 is performed prior to attachment (attach) to the web. It should be understood that fig. 3 shows steps or operations of a communication method, but these steps or operations are only examples, and other operations or variations of the respective operations in fig. 3 may also be performed by the embodiments of the present application. Moreover, the various steps in FIG. 3 may be performed in a different order presented in FIG. 3, and it is possible that not all of the operations in FIG. 3 may be performed.

As shown in fig. 3, the method 300 may include steps 301 to 306. The various steps in method 300 are described in detail below in conjunction with fig. 3.

301 is the list of currently serving PLMNs on the off-network PLMN?

For example, when the terminal device is powered on, the terminal device may select a cell for network camping by reading the system message. At this time, the determination module added in the embodiment of the present application may preferentially determine whether the current network is in the network-quit PLMN list. Illustratively, the network-quitting PLMN list may include at least one 2/3G PLMN that has quitted the network. Optionally, the network-quit PLMN list may be pre-established in the terminal device. In particular, reference may be made to the description in fig. 2.

302 centered on speech?

Specifically, when it is determined in step 302 that the 2/3G network of the currently serving PLMN is in the network-quit PLMN list, i.e., it is determined that the currently serving PLMN is a PLMN that has quitted, step 302 may be performed, i.e., it is further determined whether the terminal device is configured to be voice-centric. For example, it may be determined whether ue _ use _ setting is configured as voice center?

303 configured to register data-centric and the default configuration for tagging is voice-centric.

Specifically, when it is determined in step 302 that the terminal device is configured to be voice-centric, the terminal device may be configured to be data-centric registration, and a default configuration of the terminal device may be marked as voice-centric. For example, the configuration of ue _ use _ setting may be modified from voice center to data center, and the default configuration of ue _ use _ setting may be marked as voice center.

304, data-centric and default configuration is voice-centric?

Specifically, when it is determined in step 302 that the 2/3G network of the currently serving PLMN is not in the network-quit PLMN list, i.e., it is determined that the currently serving PLMN is not a network-quit PLMN, step 304 may be performed, i.e., it is further determined whether the terminal device is configured to be data-centric and by default to be voice-centric? For example, it may be determined whether ue _ use _ setting is configured as a data center, and whether ue _ use _ setting is configured as a voice center by default?

305 configured to be voice centric.

For example, the configuration of ue _ use _ setting may be modified from data centric to voice centric.

In other embodiments, when data is centric and the default configuration is data centric in step 304, no modification of the configuration may be performed.

And 306, attaching the resident network.

Specifically, the registration can be continued according to the specification of the existing protocol, so as to realize the attachment and the network residence of the terminal device.

Therefore, in the embodiment of the present application, when the 2/3G network of the currently serving PLMN has quit, the field in the attach request is configured to be data-centric for network registration, so that the requirement that an operator must be voice-centric for the voice device can be met, and meanwhile, it is ensured that the terminal device can normally use the data service and the voice service, thereby improving the network experience of the voice device.

The present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical concept of the present invention, and the technical solution of the present invention is protected by the present invention. For example, the various features described in the foregoing detailed description may be combined in any suitable manner without contradiction, and various combinations that may be possible are not described in this application in order to avoid unnecessary repetition. For example, various embodiments of the present application may be arbitrarily combined with each other, and the same should be considered as the disclosure of the present application as long as the concept of the present application is not violated.

It should also be understood that, in the various method embodiments of the present application, the sequence numbers of the above-mentioned processes do not imply an execution sequence, and the execution sequence of the processes should be determined by their functions and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

Method embodiments of the present application are described in detail above in conjunction with fig. 1-3, and apparatus embodiments of the present application are described in detail below in conjunction with fig. 4 and 5.

Fig. 4 is a schematic block diagram of a communication apparatus 400 according to an embodiment of the present application. As shown in fig. 4, the communication device 400 may include a processing unit 410 and a transceiving unit 420.

The transceiver 420 is configured to obtain first information, where the first information is used to indicate a public land mobile network PLMN of a current network.

A processing unit 410, configured to determine whether the network of the first standard of the PLMN has quit.

The processing unit 410 is further configured to configure a first field in the first attach request as data center when the network in the first system of the PLMN has quit.

The transceiving unit 420 is further configured to send the first attach request for network registration.

In some optional embodiments, the processing unit 410 is specifically configured to:

when the PLMN is in a network quitting PLMN list, determining that the PLMN is already quitted, wherein the network quitting PLMN list comprises at least one PLMN of a first system and which is already quitted;

and when the PLMN is not in the network quitting PLMN list, determining that the network of the first system of the PLMN does not quit the network.

In some optional embodiments, the processing unit 410 is further configured to invoke an AT command to establish or update the PLMN list.

In some optional embodiments, the processing unit 410 is further configured to determine second information, the second information being used to mark the default configuration of the first field as being voice-centric.

In some optional embodiments, in a case that the processing unit 410 determines that the network in the first system of the PLMN does not quit, the transceiver unit 420 is configured to send a second attach request to perform network registration configuration, where a second field of the second attach request is a default configuration of an operator.

In some optional embodiments, the receiving unit 420 is specifically configured to:

acquiring a system message, wherein the system message comprises the first information;

and acquiring the first information according to the system message.

It is to be understood that apparatus embodiments and method embodiments may correspond to one another and that similar descriptions may refer to method embodiments. To avoid repetition, further description is omitted here. Specifically, the communication apparatus 400 shown in fig. 4 may correspond to a corresponding main body for executing the

method

200 or 300 according to the embodiment of the present application, and the foregoing and other operations and/or functions of the respective modules in the communication apparatus 400 are respectively for implementing the respective methods in fig. 2 or fig. 3, or the corresponding flows in the methods in fig. 2 or fig. 3, and are not repeated herein for brevity.

The apparatus and system of embodiments of the present application are described above in connection with the drawings from the perspective of functional modules. It should be understood that the functional modules may be implemented by hardware, by instructions in software, or by a combination of hardware and software modules. Specifically, the steps of the method embodiments in the present application may be implemented by integrated logic circuits of hardware in a processor and/or instructions in the form of software, and the steps of the method disclosed in conjunction with the embodiments in the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. Alternatively, the software modules may be located in random access memory, flash memory, read only memory, programmable read only memory, electrically erasable programmable memory, registers, and the like, as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps in the above method embodiments in combination with hardware thereof.

Fig. 5 is a schematic block diagram of an electronic device 500 provided in an embodiment of the present application.

As shown in fig. 5, the electronic device 500 may include:

a memory 510 and a processor 520, the memory 510 being configured to store a computer program and to transfer the program code to the processor 520. In other words, the processor 520 may call and execute a computer program from the memory 510 to implement the communication method in the embodiment of the present application.

For example, the processor 520 may be configured to perform the steps of the

method

200 or 300 according to instructions in the computer program.

In some embodiments of the present application, the processor 520 may include, but is not limited to:

general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, and the like.

In some embodiments of the present application, the memory 510 includes, but is not limited to:

volatile memory and/or non-volatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM).

In some embodiments of the present application, the computer program may be partitioned into one or more modules, which are stored in the memory 510 and executed by the processor 520 to perform the encoding methods provided herein. The one or more modules may be a series of computer program instruction segments capable of performing certain functions, the instruction segments describing the execution of the computer program in the electronic device 500.

Optionally, as shown in fig. 5, the electronic device 500 may further include:

a transceiver 530, the transceiver 530 being connectable to the processor 520 or the memory 510.

The processor 520 may control the transceiver 530 to communicate with other devices, and in particular, may transmit information or data to the other devices or receive information or data transmitted by the other devices. The transceiver 530 may include a transmitter and a receiver. The transceiver 530 may further include one or more antennas.

It should be understood that the various components in the electronic device 500 are connected by a bus system that includes a power bus, a control bus, and a status signal bus in addition to a data bus.

According to an aspect of the present application, there is provided a communication apparatus comprising a processor and a memory, the memory storing a computer program, the processor being configured to call and execute the computer program stored in the memory, so that the encoder performs the communication method of the above-mentioned method embodiment.

According to another aspect of the present application, there is also provided a communication system including the above communication apparatus.

According to an aspect of the present application, there is provided a computer storage medium having a computer program stored thereon, which, when executed by a computer, enables the computer to perform the method of the above-described method embodiments. In other words, the present application also provides a computer program product containing instructions, which when executed by a computer, cause the computer to execute the method of the above method embodiments.

According to another aspect of the application, a computer program product or computer program is provided, comprising computer instructions stored in a computer readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the computer device to perform the method of the above-described method embodiment.

In other words, 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. The procedures or functions described in accordance with the embodiments of the present application occur, in whole or in part, when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.

Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the module is merely a logical division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or modules, and may be in an electrical, mechanical or other form.

Modules described as separate parts may or may not be physically separate, and parts displayed as modules may or may not be physical modules, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. For example, functional modules in the embodiments of the present application may be integrated into one processing module, or each of the modules may exist alone physically, or two or more modules are integrated into one module.

In summary, the present disclosure is only an embodiment of the present disclosure, but the scope of the present disclosure is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present disclosure, and all the changes or substitutions should be covered by the scope of the present disclosure. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of communication, comprising:

and sending the first attachment request for network registration.

2. The method of claim 1, wherein the determining whether the network of the first standard of the PLMN has quit comprises:

when the PLMN is in a network quitting PLMN list, determining that the network of the first system of the PLMN already quits the network, wherein the network quitting PLMN list comprises at least one PLMN of the first system of the network already quits the network;

3. The method of claim 2, further comprising:

invoking an AT command to establish or update the PLMN list.

4. The method of claim 1, further comprising:

determining second information, the second information for marking a default configuration of the first field as voice-centric.

5. The method of claim 1, further comprising:

and sending a second attach request to perform network registration configuration under the condition that the network of the first system of the PLMN does not quit, wherein a second field of the second attach request is default configuration of an operator.

6. The method of claim 1, wherein obtaining the first information comprises:

and acquiring the first information according to the system message.

7. A communications apparatus, comprising:

8. The apparatus according to claim 7, wherein the processing unit is specifically configured to:

9. A communications apparatus comprising a processor and a memory, the memory having stored therein instructions that, when executed by the processor, cause the apparatus to perform the method of any of claims 1 to 6.

10. A computer-readable storage medium, in which a computer program or instructions are stored which, when executed by a communication apparatus, carry out the method of any one of claims 1 to 6.

11. A computer program product, comprising computer program code which, when executed by a communication device, causes the communication device to perform the method of any of claims 1 to 6.