WO2020199060A1

WO2020199060A1 - Network access method and related device

Info

Publication number: WO2020199060A1
Application number: PCT/CN2019/080698
Authority: WO
Inventors: 石聪; 王淑坤
Original assignee: Oppo广东移动通信有限公司
Priority date: 2019-03-30
Filing date: 2019-03-30
Publication date: 2020-10-08
Also published as: CN112020899B; CN112020899A

Abstract

Disclosed in embodiments of the present application are a network access method and a related terminal. In the network access method, the terminal can determine a PLMN corresponding to a measured PCI, and execute cell selection or reselection process based on a first cell identified by the PCI when the PLMN corresponding to the PCI is a PLMN or EPLMN of the terminal, so as to avoid being unable to complete the cell selection or reselection process caused by the fact that the PLMN of the first cell does not belong to the PLMN or EPLMN of the terminal, which facilitates ensuring the reliability of network access.

Description

Network access method and related equipment

Technical field

This application relates to the field of communication technology, and in particular to a network access method and related equipment.

Background technique

In the new generation of radio access technology (NR) and future communication systems, unlicensed frequency bands can be used in certain scenarios, so that multiple operators’ cells will be deployed on the same carrier. That is, there are different public land mobile networks (Public Land Mobile Network, PLMN) on one carrier, which causes the terminal to be unable to perform operations such as cell selection or reselection.

Summary of the invention

The embodiments of the present application provide a network access method and related equipment, which can perform operations such as cell selection or reselection.

In the first aspect, an embodiment of the present application provides a network access method, including:

The terminal determines the public land mobile network PLMN corresponding to the first physical cell identifier PCI, where the first PCI is used to identify the first cell;

When the PLMN corresponding to the first PCI belongs to the PLMN or EPLMN of the terminal, the terminal performs a cell selection or reselection process based on the first cell.

In the second aspect, an embodiment of the present application provides a terminal, which has a function of implementing the behavior of the terminal in the above method design. The function can be realized by hardware, or by hardware executing corresponding software. The hardware or software includes one or more modules corresponding to the above-mentioned functions. In a possible design, the terminal includes a processor, and the processor is configured to support the terminal to perform corresponding functions in the foregoing method. Further, the terminal may also include a transceiver, which is used to support communication between the terminal and the network device. Further, the terminal may also include a memory, which is used for coupling with the processor and stores necessary program instructions and data of the terminal.

In a third aspect, an embodiment of the present application provides a terminal including a processor, a memory, a communication interface, and one or more programs, wherein the one or more programs are stored in the memory and are configured by The processor executes, and the program includes instructions for executing steps in any method of the first aspect of the embodiments of the present application.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute For example, some or all of the steps described in any method of the first aspect.

In the fifth aspect, the embodiments of the present application provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute Part or all of the steps described in any method in the first aspect of the application embodiment. The computer program product may be a software installation package.

It can be seen that in this embodiment of the application, the terminal can determine the PLMN of the cell identified by the measured PCI, and when the PLMN corresponding to the PCI is the PLMN or EPLMN of the terminal, perform cell selection or reselection based on the cell identified by the PCI Therefore, it is avoided that the cell selection or reselection process cannot be completed because the PLMN of the cell identified by the measured PCI does not belong to the PLMN or EPLMN of the terminal, which is beneficial to ensure the reliability of network access.

Description of the drawings

The following will briefly introduce the drawings needed in the description of the embodiments or the prior art.

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

2 is a schematic flowchart of a network access method provided by an embodiment of the present application;

FIG. 3 is a schematic flowchart of another network access method provided by an embodiment of the present application;

4 is a schematic flowchart of another network access method provided by an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of the present application;

Fig. 6 is a block diagram of functional units of a terminal provided by an embodiment of the present application.

detailed description

The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.

By way of example, Fig. 1 shows the wireless communication system involved in the present application. The wireless communication system 100 may work in a high frequency band, and may be the 5th Generation (5G) system, the New Radio (NR) system, and the machine-to-machine communication (Machine to Machine) system that will evolve in the future. Machine, M2M) system, etc. As shown in FIG. 1, the wireless communication system 100 may include: one or more network devices 101 and one or more terminals 102. Among them: the network device 101 can be a base station, which can be used to communicate with one or more terminals, and can also be used to communicate with one or more base stations with partial terminal functions (such as macro base stations and micro base stations, such as access Point, communication between). The base station can be the Base Transceiver Station (BTS) in the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or it can be the Long Term Evolution (LTE) system Evolutional Node B (eNB), and the base station gNB in 5G and NR systems. In addition, the base station may also be an access point (Access Point, AP), a transmission node (Trans TRP), a central unit (Central Unit, CU) or other network entities, and may include some or all of the functions of the above network entities . The terminal 102 may be distributed in the entire wireless communication system 100, and may be stationary or mobile. In some embodiments of the present application, the terminal 102 may be a mobile device (such as a smart phone), a mobile station (mobile station), a mobile unit (mobile unit), an M2M terminal, a wireless unit, a remote unit, a user agent, or a user equipment ( User Equipment, UE) mobile client, etc.

It should be noted that the communication system 100 shown in FIG. 1 is only to illustrate the technical solution of the application more clearly, and does not constitute a limitation to the application. Those of ordinary skill in the art will know that with the evolution of the network architecture and new business scenarios The technical solutions provided in this application are equally applicable to similar technical problems.

To help understand the embodiments of the present application, related concepts are introduced below.

The physical cell ID (Physical Cell ID, PCI) is used to distinguish different cells. Optionally, the terminal may obtain the cell ID, that is, the PCI from the detected primary synchronization signal (Primary Synchronization Sequence, PSS) and secondary synchronization signal (Secondary Synchronization Sequence, SSS) from the system information of the cell.

Cell selection means that the terminal turns on, returns from the radio resource control connected state (Radio Resource Control_Connected, RRC_CONNECTED) to the radio resource control idle state (Radio Resource Control_Idle, RRC_IDLE), or selects a channel when it re-enters the service area where services are available The cell that meets the quality requirements performs the camping process. Among them, cell selection is generally divided into initial cell selection and cell selection based on stored information. The difference between the two is whether the terminal has stored carrier frequency related information, but both select a suitable cell. Among them, if the cell storing the relevant information in the stored information is not suitable, the terminal can initiate initial cell selection, that is, scan all frequency bands according to its own capabilities. In the cell selection process, the terminal needs to measure the candidate cell to facilitate channel quality assessment, thereby determining whether it meets the criteria for camping.

Cell reselection refers to the process in which the terminal selects the best cell to provide services by monitoring the signal quality of the neighboring cell and the current cell in RRC_IDLE. When the signal quality and level measured by the neighboring cell meet the reselection criteria, the neighboring cell can be connected to reside. In other words, the cell reselection process also includes two parts: measurement and reselection. Among them, the cell reselection process can be divided into intra-system cell measurement and reselection, and inter-system cell measurement and reselection. Among them, the cell measurement and reselection in the system are divided into: same frequency cell measurement and reselection, and, different frequency cell measurement and reselection. Optionally, the terminal can also perform reselection based on the priority of different frequencies or frequency groups, that is, it can perform reselection based on the reselection priority. For example, for a carrier frequency whose reselection priority is higher than the current serving cell, the terminal can always measure the carrier frequency.

In the embodiment of this application, the first PCI is the cell whose channel quality meets preset rules during the cell selection or reselection process performed by the terminal, such as the identity of the cell whose channel quality meets the cell reselection rules, cell selection criteria, etc., etc. The embodiments of this application do not make limitations. Correspondingly, the second PCI is also a cell whose channel quality meets a preset rule during the cell selection or reselection process performed by the terminal, and so on.

The channel quality may include Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), or layer 1 (L1) channel conditions.

Public Land Mobile Network (PLMN) is a network established and operated by the government or an operator approved by it to provide the public with land mobile communication services. This network is usually interconnected with the Public Switched Telephone Network (PSTN) to form an entire region or country-scale communication network. For example, the public land mobile network PLMN of China Mobile is 46000, and the public land mobile network PLMN of China Unicom is 46001. Equivalent Public Land Mobile Network (EPLMN) is a public land mobile network PLMN that is in the same position as the public land mobile network PLMN registered by the terminal, and has the same priority.

The PLMN of the terminal may also be referred to as the PLMN or EPLMN registered by the terminal, which is not distinguished in the embodiment of the present application. Correspondingly, the PLMN corresponding to the PCI may also be referred to as the PLMN of the cell identified by the PCI.

In the network access method provided by the embodiments of the present application, in the process of cell selection or cell reselection, in addition to measuring the signal quality of the cell, the terminal also determines whether the PLMN of the cell belongs to the PLMN or EPLMN registered by the terminal, which is beneficial For the cell belonging to the PLMN or EPLMN where the terminal is registered, the process of cell selection or reselection helps to improve the success rate of network access.

In particular, in NR scenarios, unlicensed spectrum can be used for communication based on energy detection. There may be cell deployments of multiple operators on the same carrier frequency of the unlicensed spectrum, that is, there are different PLMNs on the same carrier frequency. In the process of cell selection or reselection, the terminal will detect that the cell with better signal quality does not belong to its own PLMN network and cannot be accessed, resulting in cell selection or reselection failure. In the embodiment of this application, the PLMN of the cell can be determined before the cell selection or reselection. When the PLMN of the cell belongs to the PLMN or EPLMN of the terminal, the cell selection or reselection is performed, which greatly improves network access or cell reselection. The success rate of residency.

The embodiments of the present application will be described in detail below in conjunction with the drawings.

Please refer to FIG. 2. FIG. 2 is a schematic flowchart of a network access method provided by an embodiment of the present application, which is applied to the communication system of the above example, and the method includes:

In part 201, the terminal determines the public land mobile network PLMN corresponding to the first physical cell identifier PCI, where the first PCI is used to identify the first cell;

In part 202, the terminal performs a cell selection or reselection process based on the first cell when the PLMN corresponding to the first PCI belongs to the terminal's PLMN or equivalent public land mobile network EPLMN.

In a possible example, when the terminal determines the PLMN corresponding to the first PCI, it can be obtained by looking up a table. For example, the terminal device and/or network device maintains a first list, and the first list stores one or more PCI, and one or more PLMNs corresponding to each PCI. Therefore, the terminal can determine the PLMN corresponding to the first PCI by directly looking up the table, which greatly reduces the delay in the cell selection or reselection process.

In a possible example, the terminal receives a first message, where the first message carries a first list; the first message is a system information SI message or a radio resource control release RRC-released message. Among them, the system information (System Information, SI) message is sent in a broadcast manner by the serving cell to which the terminal is currently connected.

In a possible example, the terminal determines the PLMN corresponding to the first PCI, which may be obtained from the system information block (system information block, SIB) of the cell identified by the first PCI. For example, the PLMN of the cell can be obtained in SIB1 or other SIBs. Thus, the signaling overhead is reduced.

In a possible example, the terminal may also maintain a list of forbidden access cells, and the PCI in the list of forbidden access cells does not belong to the PLMN or EPLMN of the terminal. Thereby, the terminal can quickly remove the inaccessible neighboring cell, which reduces the delay of the cell selection or reselection process to a certain extent.

In a possible example, the terminal also maintains a first list to save the foregoing signaling or broadcasting overhead. That is, the terminal may update the first list based on the PLMN corresponding to the first PCI, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI. Thus, cell selection or reselection can be achieved while saving signaling overhead.

In a possible example, the terminal sends the determined PLMN corresponding to the first PCI to the network device, so that the network device updates or creates a first list, and the first list stores one or more PCIs. , And one or more PLMNs corresponding to each PCI.

In a possible example, before the terminal sends the determined PLMN corresponding to the first PCI to the network device, the terminal receives the first indication information sent by the network device, and the first indication information is used to indicate the The terminal measures and reports the PLMN of neighboring cells. In this way, the first list can be updated in time.

In a possible example, when the first PCI does not belong to the PLMN or EPLMN of the terminal, the terminal determines the PLMN corresponding to the second PCI, and the second PCI is used to identify the second cell; and the terminal is in the second PCI When the corresponding PLMN belongs to the PLMN or EPLMN of the terminal, a cell selection or reselection process is performed based on the second cell. Wherein, the second cell may not belong to the best cell for measuring carrier frequency, but belongs to the best cell of the terminal's PLMN or EPLMN. Therefore, it is beneficial to realize cell selection or reselection on the unlicensed spectrum.

In the following, the network access method described in the embodiment of the present application will be further described with reference to the interaction manner between the network device and the terminal device and with reference to FIG. 3 and FIG. 4.

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of another network access method provided by an embodiment of the present application, which is applied to the above exemplary communication system, and the method includes:

In part 301, the network device sends a first message, and the terminal device receives the first message.

The first message carries the aforementioned first list, and the first message may be a system information SI message or a radio resource control release RRC-Released message.

In part 302, the terminal determines the public land mobile network PLMN corresponding to the first physical cell identity PCI according to the first list.

Wherein, the first PCI is used to identify the first cell.

In part 303, when the PLMN corresponding to the first PCI belongs to the terminal's PLMN or equivalent public land mobile network EPLMN, the terminal performs a cell selection or reselection process based on the first cell.

In part 304, when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal, the terminal adds the first PCI to the list of forbidden access cells of the terminal.

In part 305, the terminal determines the PLMN corresponding to the second PCI, where the second PCI is used to identify the second cell;

In part 306, when the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal, the terminal performs a cell selection or reselection process based on the second cell.

It can be seen that, in this example, the network device can send the first list to the terminal through the first message, for example, by broadcasting the SI message through the serving cell, so that the terminal can determine the PLMN corresponding to PCI based on the first list, so that the PLMN belongs to The cell of the PLMN or EPLMN of the terminal undergoes a selection or reselection process. Further, in this example, the terminal can also maintain a list of forbidden access cells. The PLMN corresponding to each PCI in the list of forbidden access cells does not belong to the terminal’s PLMN or EPLMN, and the PCI measured at the terminal is in the forbidden access cell. When the list exists, give up camping on the cell or give up cell selection or reselection for the cell, but measure other PCIs in time, which can greatly improve the efficiency of cell selection or reselection.

Please refer to FIG. 4, which is a schematic flowchart of another network access method provided by an embodiment of the present application, which is applied to the above example communication system. Compared with the method shown in FIG. 3, this method differs in that the terminal In the first list, there is no correspondence between the first PCI and its PLMN, that is, when the PLMN corresponding to the first PCI cannot be determined, it can be obtained through the system information block corresponding to the first PCI. Further, the terminal device and/or network can be updated The first list of equipment maintenance.

As shown in Figure 4, the network access method may include:

In part 401, the terminal obtains the public land mobile network PLMN corresponding to the first PCI from the system information block SIB corresponding to the first physical cell identifier PCI;

In part 402, when the PLMN corresponding to the first PCI belongs to the PLMN of the terminal or an equivalent public land mobile network EPLMN, the terminal performs a cell selection or reselection process based on the cell identified by the first PCI;

In part 403, when the PLMN corresponding to the first PCI belongs to the terminal’s PLMN or equivalent public land mobile network EPLMN, the terminal sends the determined PLMN corresponding to the first PCI to the network device, and updates its own storage The first list;

It can be seen that this part can cause the network device to update or create the first list.

Optionally, before this part is executed, the network device may also send first indication information to the terminal device, where the first indication information is used to instruct the terminal to report the PLMN corresponding to the first PCI, or to indicate the The terminal measures and reports the PLMN of neighboring cells. So that the network device updates the first list stored by itself;

In part 404, when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal, the terminal adds the first PCI to the list of prohibited access cells of the terminal;

In part 405, the terminal determines the PLMN corresponding to the second PCI, where the second PCI is used to identify the second cell;

Wherein, for the terminal to determine the PLMN corresponding to the second PCI, refer to the foregoing optional implementation manner of the PLMN corresponding to the first PCI.

In part 406, when the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal, the terminal performs a cell selection or reselection process based on the second cell.

It can be seen that in this example, the terminal device can obtain the PLMN corresponding to the first PCI by receiving the system information block SIB corresponding to the first PCI, and when the PLMN belongs to the terminal’s PLMN or EPLMN, the first PCI corresponds to the PLMN The relationship is sent to the network device, so that the network device itself updates the first list; optionally, the terminal device can also update the first list maintained by itself, so that the resource overhead for sending the first list can be saved. Further, when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal, the PLMN corresponding to the measured second PCI can be determined to implement cell selection or reselection.

Consistent with the foregoing embodiment, please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a terminal provided by an embodiment of the present application. As shown in the figure, the terminal includes a processor 510, a memory 520, a communication interface 530, and one or more A program 521, wherein the one or more programs 521 are stored in the memory and configured to be executed by the processor 510, and the program includes instructions for executing the following steps;

Determine the public land mobile network PLMN corresponding to the first physical cell identifier PCI, where the first PCI is used to identify the first cell;

When the PLMN corresponding to the first PCI belongs to the PLMN or EPLMN of the terminal, a cell selection or reselection process is performed based on the first cell.

In a possible example, the terminal receives a first message, where the first message carries a first list; the first message is a system information SI message or a radio resource control release RRC-released message.

The foregoing mainly introduces the solution of the embodiment of the present application from the perspective of interaction between various network elements. It can be understood that, in order to implement the above-mentioned functions, the terminal and the network device include hardware structures and/or software modules corresponding to each function. Those skilled in the art should easily realize that in combination with the units and algorithm steps of the examples described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

The embodiment of the present application can divide the terminal and the network device into functional units according to the above method examples. For example, each functional unit can be divided corresponding to each function, or two or more functions can be integrated into one processing unit. The above-mentioned integrated unit can be realized in the form of hardware or software program module. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.

In the case of using integrated units, FIG. 6 shows a block diagram of a possible functional unit composition of the terminal involved in the foregoing embodiment. The terminal 600 includes a processing unit 602 and a communication unit 603. The processing unit 602 is used to control and manage the actions of the terminal. For example, the processing unit 602 is used to support the terminal to perform steps 201 and 202 in FIG. 2, steps 301-303 in FIG. 3, steps 401-407 in FIG. / Or other processes used in the techniques described herein. The communication unit 603 is used to support communication between the terminal and other devices, for example, communication with the network device shown in FIG. 1. The terminal may also include a storage unit 601 for storing program codes and data of the terminal.

The processing unit 602 may be a processor or a controller, for example, a central processing unit (CPU), a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), and an application-specific integrated circuit (Application-Specific Integrated Circuit). Integrated Circuit, ASIC), Field Programmable Gate Array (FPGA) or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It can implement or execute various exemplary logical blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, for example, a combination of one or more microprocessors, a combination of a DSP and a microprocessor, and so on. The communication unit 603 may be a transceiver, a transceiver circuit, etc., and the storage unit 601 may be a memory.

The processing unit 602 is configured to determine the public land mobile network PLMN corresponding to the first physical cell identifier PCI, and the first PCI is used to identify the first cell;

The communication unit 603 performs a cell selection or reselection process based on the first cell when the PLMN corresponding to the first PCI belongs to the PLMN of the terminal or an equivalent public land mobile network EPLMN.

It can be seen that in this embodiment of the application, the terminal can determine the PLMN of the cell identified by the measured PCI, and when the PLMN corresponding to the PCI is the PLMN or EPLMN of the terminal, perform cell selection or reselection based on the cell identified by the PCI Process, so as to avoid the inability to complete the cell selection or reselection process because the PLMN of the cell identified by the measured PCI does not belong to the PLMN or EPLMN of the terminal, which helps to ensure the reliability of network access

In a possible example, the determining unit 603 determines the PLMN corresponding to the first PCI, specifically:

Query the PLMN corresponding to the first PCI from the first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

In a possible example, the determining unit 603 determines the public land mobile network PLMN corresponding to the first physical cell identity PCI, specifically: acquiring the first physical cell identity PCI from the system information block SIB corresponding to the first physical cell identity PCI A public land mobile network PLMN corresponding to PCI.

In a possible example, the communication unit 603 is further configured to determine the first PCI when the PLMN corresponding to the first PCI belongs to the terminal's PLMN or equivalent public land mobile network EPLMN The corresponding PLMN is sent to the network device, so that the network device updates or creates a first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

In a possible example, the communication unit 603 is further configured to receive first indication information sent by a network device, where the first indication information is used to instruct the terminal to report the PLMN corresponding to the first PCI.

In a possible example, the processing unit 602 is further configured to update a first list based on the PLMN corresponding to the first PCI. The first list stores one or more PCIs, and each One or more PLMNs corresponding to PCI.

In a possible example, the processing unit 602 is further configured to add the first PCI to the prohibition of the terminal when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal Access the cell list.

In a possible example, the processing unit 602 is further configured to determine the PLMN corresponding to the second PCI, and the second PCI is used to identify the second cell; the communication unit 603 is further configured to When the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal, a cell selection or reselection process is performed based on the second cell.

When the processing unit 602 is a processor, the communication unit 603 is a communication interface, and the storage unit 601 is a memory, the terminal involved in the embodiment of the present application may be the terminal shown in FIG. 5.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the terminal in the above method embodiment Some or all of the steps described.

The embodiment of the present application also provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program for electronic data exchange, wherein the computer program causes the computer to execute the network in the above method embodiment Part or all of the steps described by the device.

The embodiments of the present application also provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the method embodiments described above Part or all of the steps described in the terminal. The computer program product may be a software installation package.

The embodiments of the present application also provide a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to execute the network Part or all of the steps described by the device. The computer program product may be a software installation package.

The steps of the method or algorithm described in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner that a processor executes software instructions. Software instructions can be composed of corresponding software modules, which can be stored in random access memory (Random Access Memory, RAM), flash memory, read-only memory (Read Only Memory, ROM), and erasable programmable read-only memory ( Erasable Programmable ROM (EPROM), Electrically Erasable Programmable Read-Only Memory (Electrically EPROM, EEPROM), registers, hard disk, mobile hard disk, CD-ROM or any other form of storage medium known in the art An exemplary storage medium is coupled to the processor, so that the processor can read information from the storage medium and can write information to the storage medium. Of course, the storage medium may also be an integral part of the processor. The processor and the storage medium may be located in the ASIC. In addition, the ASIC may be located in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may also exist as discrete components in the access network device, the target network device, or the core network device.

Those skilled in the art should be aware that in one or more of the foregoing examples, the functions described in the embodiments of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented by software, it can be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server, or data center via wired (for example, coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Video Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)) )Wait.

The specific implementations described above further describe the purpose, technical solutions and beneficial effects of the embodiments of this application in further detail. It should be understood that the above descriptions are only specific implementations of the embodiments of this application and are not intended to To limit the protection scope of the embodiments of the application, any modification, equivalent replacement, improvement, etc. made on the basis of the technical solutions of the embodiments of the application shall be included in the protection scope of the embodiments of the application.

Claims

A network access method, characterized in that it comprises:

The terminal determines the public land mobile network PLMN corresponding to the first physical cell identifier PCI, where the first PCI is used to identify the first cell;

When the PLMN corresponding to the first PCI belongs to the PLMN of the terminal or an equivalent public land mobile network EPLMN, the terminal performs a cell selection or reselection process based on the first cell.
The method according to claim 1, wherein the terminal determining the public land mobile network PLMN corresponding to the first physical cell identity PCI comprises:

The terminal queries the public land mobile network PLMN corresponding to the first physical cell identity PCI from the first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The method of claim 2, wherein the method further comprises:

The terminal receives a first message, where the first message carries the first list;

The first message is a system information SI message or a radio resource control release RRC-released message.
The method according to claim 1, wherein the terminal determining the public land mobile network PLMN corresponding to the first physical cell identity PCI comprises:

The terminal obtains the public land mobile network PLMN corresponding to the first PCI from the system information block SIB of the first physical cell identifier PCI.
The method according to claim 4, wherein the method further comprises:

When the PLMN corresponding to the first PCI belongs to the terminal’s PLMN or equivalent public land mobile network EPLMN, the terminal sends the determined PLMN corresponding to the first PCI to the network device, so that the network device Update or create a first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The method of claim 5, wherein the method further comprises:

The terminal receives the first indication information sent by the network device, where the first indication information is used to instruct the terminal to report the PLMN corresponding to the first PCI.
The method according to any one of claims 4 to 6, wherein the method further comprises:

The terminal updates a first list based on the PLMN corresponding to the first PCI, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The method according to claim 7, wherein the method further comprises:

When the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal, the terminal adds the first PCI to the list of forbidden access cells of the terminal.
The method according to claim 8, wherein the method further comprises:

The terminal determines the PLMN corresponding to the second PCI, where the second PCI is used to identify the second cell;

When the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal, the terminal performs a cell selection or reselection process based on the second cell.
A terminal, characterized in that it comprises:

A processing unit, configured to determine the public land mobile network PLMN corresponding to the first physical cell identifier PCI, where the first PCI is used to identify the first cell;

The communication unit is configured to perform a cell selection or reselection process based on the first cell when the PLMN corresponding to the first PCI belongs to the PLMN of the terminal or an equivalent public land mobile network EPLMN.
The terminal according to claim 10, wherein the determining unit determines the PLMN corresponding to the first PCI, specifically:

Query the PLMN corresponding to the first PCI from the first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The terminal according to claim 11, wherein the communication unit is further configured to receive a first message, the first message carrying the first list; the first message is a system information SI message or Radio resource control release RRC-released message.
The terminal according to claim 10, wherein the determining unit determines the public land mobile network PLMN corresponding to the first physical cell identity PCI, specifically:

Acquire the public land mobile network PLMN corresponding to the first PCI from the system information block SIB corresponding to the first physical cell identifier PCI.
The terminal according to claim 13, wherein:

The communication unit is further configured to send the determined PLMN corresponding to the first PCI to the network device when the PLMN corresponding to the first PCI belongs to the PLMN of the terminal or an equivalent public land mobile network EPLMN. The network device is caused to update or create a first list, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The terminal according to claim 14, wherein:

The communication unit is further configured to receive first indication information sent by a network device, where the first indication information is used to instruct the terminal to report the PLMN corresponding to the first PCI.
The terminal according to any one of claims 13 to 15, wherein:

The processing unit is further configured to update a first list based on the PLMN corresponding to the first PCI, and the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.
The terminal according to claim 16, wherein:

The processing unit is further configured to add the first PCI to the list of prohibited access cells of the terminal when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal.
The terminal according to claim 17, wherein:

The processing unit is further configured to determine the PLMN corresponding to the second PCI, where the second PCI is used to identify the second cell;

The communication unit is further configured to perform a cell selection or reselection process based on the second cell when the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal.
A terminal is characterized by comprising a processor, a memory, a communication interface, and one or more programs, the one or more programs are stored in the memory and configured to be executed by the processor, and The program includes instructions for executing the steps in the method according to any one of claims 1-9.
A computer-readable storage medium, characterized in that it stores a computer program for electronic data exchange, wherein the computer program causes a computer to execute the method according to any one of claims 1-9.