CN112020899B

CN112020899B - Network access method and related equipment

Info

Publication number: CN112020899B
Application number: CN201980019526.5A
Authority: CN
Inventors: 石聪; 王淑坤
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2019-03-30
Filing date: 2019-03-30
Publication date: 2022-01-11
Anticipated expiration: 2039-03-30
Also published as: WO2020199060A1; CN112020899A

Abstract

The embodiment of the application discloses 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 when the PLMN corresponding to the PCI is the PLMN or the EPLMN of the terminal, a cell selection or reselection process is executed based on a first cell identified by the PCI, so that the situation that the cell selection or reselection process cannot be completed due to the fact that the PLMN of the first cell does not belong to the PLMN or the EPLMN of the terminal is avoided, and the reliability of network access is guaranteed.

Description

Network access method and related equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a network access method and a related device.

Background

In new radio access technology (NR) and future communication systems, unlicensed frequency bands may be used in some scenarios, so that multiple operators may deploy cells on the same carrier, that is, different Public Land Mobile Networks (PLMNs) may be deployed on one carrier, and therefore, a terminal may not perform operations such as cell selection or reselection.

Disclosure of Invention

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

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

a terminal determines a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI), wherein the first PCI is used for identifying a first cell;

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

In a second aspect, an embodiment of the present application provides a terminal, where the terminal has a function of implementing a behavior of the terminal in the above method design. The functions can be realized by hardware, and the functions can also be realized by executing corresponding software by hardware. The hardware or software includes one or more modules corresponding to the above-described functions. In one possible design, the terminal includes a processor configured to enable the terminal to perform the corresponding functions of the above-described method. Further, the terminal may further include a transceiver for supporting communication between the terminal and the network device. Further, the terminal may also include a memory, coupled to the processor, that retains program instructions and data necessary for 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, where the one or more programs are stored in the memory and configured to be executed by the processor, and the program includes instructions for performing the steps in any of the methods of the first aspect of the embodiments of the present application.

In a fourth aspect, this application provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform part or all of the steps as described in any one of the methods of the first aspect of this application.

In a fifth aspect, the present application provides a computer program product, wherein the computer program product comprises a non-transitory computer-readable storage medium storing a computer program, the computer program being operable to cause a computer to perform some or all of the steps as described in any one of the methods of the first aspect of the embodiments of the present application. The computer program product may be a software installation package.

It can be seen that, in the embodiment of the present application, the terminal may determine the PLMN of the cell identified by the measured PCI, and execute the cell selection or reselection process based on the cell identified by the PCI when the PLMN corresponding to the PCI is the PLMN or the EPLMN of the terminal, so as to avoid 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 the EPLMN of the terminal, which is beneficial to ensuring the reliability of network access.

Drawings

Reference will now be made in brief to the drawings that are needed in describing embodiments or prior art.

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

fig. 2 is a flowchart illustrating a network access method according to an embodiment of the present application;

fig. 3 is a flowchart illustrating another network access method according to an embodiment of the present application;

fig. 4 is a flowchart illustrating a further network access method according to an embodiment of the present application;

fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 6 is a block diagram illustrating functional units of a terminal according to an embodiment of the present disclosure.

Detailed Description

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

By way of example, fig. 1 illustrates a wireless communication system to which the present application relates. The wireless communication system 100 may operate in a high frequency band, and may be a future-evolution fifth-Generation mobile communication (5G) system, a New Radio (NR) system, a Machine-to-Machine (M2M) system, or the like. As shown in fig. 1, the wireless communication system 100 may include: one or more network devices 101, one or more terminals 102. Wherein: the network device 101 may be a base station, and the base station may be configured to communicate with one or more terminals, and may also be configured to communicate with one or more base stations having partial terminal functions (e.g., communication between a macro base station and a micro base station, such as an access point). The Base Station may be a Base Transceiver Station (BTS) in a Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, or an evolved Node B (eNB) in a Long Term Evolution (LTE) system, or a Base Station gNB in a 5G system or an NR system. In addition, the base station may also be an Access Point (AP), a transmission node (Trans TRP), a Central Unit (CU), or other network entity, and may include some or all of the functions of the above network entities. The terminals 102 may be distributed throughout the 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 (e.g., 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, a User Equipment (UE) mobile client, and so on.

It should be noted that the communication system 100 shown in fig. 1 is only for more clearly illustrating the technical solution of the present application, and does not constitute a limitation to the present application, and as a person having ordinary skill in the art knows, the technical solution provided in the present application is also applicable to similar technical problems as the network architecture evolves and new service scenarios emerge.

To assist in understanding embodiments of the present application, the following description is made of related concepts.

Physical Cell Identity (PCI) is used to distinguish different cells. Alternatively, the terminal may obtain the cell ID, i.e., the PCI, from system information of the cell, such as a Primary Synchronization Sequence (PSS) and a Secondary Synchronization Signal (SSS) detected.

The cell selection refers to a process of starting up the terminal, returning from a Radio Resource Control Connected state (RRC _ Connected) to a Radio Resource Control Idle state (RRC _ Idle), or selecting a cell with a channel quality meeting a condition to camp on when the terminal reenters a service area where service can be obtained. The cell selection is generally divided into initial cell selection and cell selection based on stored information, and the difference between the initial cell selection and the cell selection is whether the terminal stores carrier frequency related information or not, but selects a suitable cell. If the cell storing the relevant information in the storage information is not suitable, the terminal can initiate initial cell selection, namely, all frequency bands are scanned according to the self capability. In the cell selection process, the terminal needs to measure the candidate cell to facilitate channel quality evaluation, so as to determine whether it meets the camping standard.

Cell reselection refers to a process that a terminal selects a best cell to provide service by monitoring signal quality of a neighboring cell and a current cell in RRC _ IDLE. When the signal quality and level measured by the adjacent cell meet the reselection criterion, the cell can be accessed to reside. That is, the cell reselection procedure also includes both measurement and reselection. The cell reselection process can be divided into intra-system cell measurement and reselection, and inter-system cell measurement and reselection. Wherein, the cell measurement and reselection in the system are divided into: measurement and reselection of co-frequency cells, and measurement and reselection of inter-frequency cells. Optionally, the terminal may also perform reselection based on priorities of different frequencies or frequency groups, that is, may perform reselection based on reselection priorities. For example, for a carrier frequency with a higher reselection priority than the current serving cell, the terminal may always perform measurement on the carrier frequency.

In this embodiment, in the cell selection or reselection performed by the terminal, the first PCI is a cell whose channel quality meets a preset rule, for example, an identifier of a cell whose channel quality meets a cell reselection rule, a cell selection criterion, and the like, and the embodiment of the present application is not limited. Correspondingly, the second PCI also provides a cell whose channel quality meets a preset rule during cell selection or reselection performed by the terminal, and so on.

The channel Quality may include Reference Signal Receiving Power (RSRP), Reference Signal Receiving Quality (RSRQ), or a channel condition of layer 1 (L1).

Public Land Mobile Networks (PLMNs) are networks established and operated by governments or operators approved by them for the purpose of providing Land Mobile services to the Public. The Network is typically interconnected with the Public Switched Telephone Network (PSTN) to form a regional or national scale communications 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. An Equivalent Public Land Mobile Network (EPLMN) is a Public Land Mobile Network PLMN that is the same as the Public Land Mobile Network PLMN to which the terminal is registered, and has the same priority.

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

In the network access method provided by the embodiment of the application, in the process of cell selection or cell reselection, the terminal not only measures the signal quality of the cell, but also determines whether the PLMN of the cell belongs to the PLMN or EPLMN registered by the terminal, so that the process of cell selection or reselection is favorably performed on the cell belonging to the PLMN or EPLMN registered by the terminal, and the success rate of network access is favorably improved.

Particularly, in an NR scenario, an unlicensed spectrum may be used for communication based on energy detection, and cells of multiple operators may be deployed on the same carrier frequency of the unlicensed spectrum, that is, different PLMNs are located on the same carrier frequency, so that in a process of performing cell selection or reselection by a terminal, it is detected that a cell with better signal quality does not belong to a PLMN network of the terminal, and cannot be accessed, which results in a failure in cell selection or reselection. In the embodiment of the application, before cell selection or reselection, the PLMN of the cell can be determined, and when the PLMN of the cell belongs to the PLMN or the EPLMN of the terminal, the cell selection or reselection is executed, so that the success rate of network access or cell residence is greatly improved.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 2, fig. 2 is a flowchart illustrating a network access method according to an embodiment of the present application, which is applied to the communication system in the foregoing example, and the method includes:

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

in part 202, the terminal performs a cell selection or reselection procedure based on the first cell when the PLMN corresponding to the first PCI belongs to a PLMN of the terminal or an equivalent public land mobile network, EPLMN.

In one possible example, when the terminal determines the PLMN corresponding to the first PCI, the PLMN may be obtained by looking up a table, for example, the terminal device and/or the network device maintains a first list, where the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI. Therefore, the terminal can determine the PLMN corresponding to the first PCI through a direct table look-up manner, and the delay of the cell selection or reselection process is greatly reduced.

In one possible example, a 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. Wherein, the System Information (SI) message is transmitted in a broadcast manner by a serving cell to which the terminal is currently connected.

In one possible example, the terminal determines a PLMN corresponding to the first PCI, and may obtain a System Information Block (SIB) of a cell identified by the first PCI. For example, the PLMN of the cell may be acquired in SIB1 or other SIBs. Thus, signaling overhead is reduced.

In a possible example, the terminal may further maintain a forbidden access cell list, where the PCIs in the forbidden access cell list do not belong to the PLMN or the EPLMN of the terminal. Therefore, the terminal can quickly remove the adjacent cell which cannot be accessed, and the delay of the cell selection or reselection process is reduced to a certain extent.

In one possible example, the terminal also maintains a first list to save the signaling or broadcast overhead described above. That is, the terminal may update the first list storing one or more PCIs and one or more PLMNs corresponding to each PCI based on the PLMN corresponding to the first PCI. Therefore, the signaling overhead can be saved while cell selection or reselection can be realized.

In one possible example, the terminal sends the determined PLMN corresponding to the first PCI to a network device, so that the network device updates or creates a first list storing 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 first indication information sent by the network device, where the first indication information is used to indicate the terminal to measure and report the PLMN of the neighboring cell. In this way, the first list can be made to 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 a PLMN corresponding to a second PCI, where the second PCI is used to identify the second cell; and when the PLMN corresponding to the second PCI belongs to the PLMN or the EPLMN of the terminal, the terminal executes a cell selection or reselection process based on the second cell. Wherein the second cell may not belong to the best cell of the measured carrier frequency, but belongs to the best cell of the PLMN or EPLMN of the terminal. Therefore, the method is beneficial to realizing the selection or reselection of the cell on the unlicensed spectrum.

The network access method according to the embodiment of the present application is further described below with reference to fig. 3 and 4 in combination with a manner of interaction between a network device and a terminal device.

Referring to fig. 3, fig. 3 is a schematic flowchart of another network access method provided in the embodiment of the present application, which is applied to the above exemplary communication system, and the method includes:

in part 301, a network device sends a first message, which is received by a terminal device.

The first message carries the 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 a public land mobile network PLMN corresponding to the first physical cell identity PCI according to the first list.

Wherein the first PCI is used for identifying the first cell.

In part 303, the terminal performs a cell selection or reselection procedure 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.

In part 304, the terminal adds the first PCI to a list of cells to which the terminal is barred from accessing when the PLMN corresponding to the first PCI does not belong to the PLMN or EPLMN of the terminal.

At element 305, the terminal determines a PLMN corresponding to a second PCI used to identify a second cell;

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

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, through broadcasting an SI message by the serving cell, so that the terminal can determine a PLMN corresponding to the PCI based on the first list, so as to perform a selection or reselection process for a cell of a PLMN or an EPLMN of which the PLMN belongs to the terminal. Further, in this example, the terminal may further maintain a list of cells to which access is prohibited, where PLMNs corresponding to PCIs in the list of cells to which access is prohibited do not belong to the PLMN or the EPLMN of the terminal, and when the PCI measured by the terminal exists in the list of cells to which access is prohibited, the terminal gives up camping on the cell or giving up cell selection or reselection for the cell, but measures other PCIs in time, so that efficiency of cell selection or reselection can be greatly improved.

Referring to fig. 4, fig. 4 is a flowchart of another network access method provided in this embodiment, which is applied to the above-mentioned exemplary communication system, and the difference between the method and the method shown in fig. 3 is that when the first list does not have a correspondence relationship between a first PCI and a PLMN thereof, that is, the PLMN corresponding to the first PCI cannot be determined, the first list can be obtained through a system information block corresponding to the first PCI, and further, the first list maintained by the terminal device and/or the network device can be updated.

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

in part 401, the terminal acquires a public land mobile network PLMN corresponding to a first physical cell identity, PCI, from a system information block, SIB, corresponding to the first 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 PLMN of the terminal or an equivalent public land mobile network EPLMN, the terminal sends the determined PLMN corresponding to the first PCI to the network device, and updates a first list stored in the terminal itself;

as can be seen, this portion may cause the network device to update or create the first list.

Optionally, before the executing of the part, the network device may further send first indication information to the terminal device, where the first indication information is used to indicate the terminal to report the PLMN corresponding to the first PCI, or is used to indicate the terminal to measure and report the PLMN of the neighboring cell. Thereby enabling the network device to update the first list stored by the network device;

in part 404, the terminal adds the first PCI to a list of cells to which the terminal is prohibited from accessing when the PLMN corresponding to the first PCI does not belong to the PLMN or the EPLMN of the terminal;

in part 405, the terminal determines a PLMN corresponding to a second PCI used to identify a second cell;

the terminal determines that the PLMN corresponding to the second PCI may refer to the optional implementation of the PLMN corresponding to the first PCI.

At element 406, the terminal performs a cell selection or reselection procedure based on the second cell when the PLMN corresponding to the second PCI belongs to the PLMN or EPLMN of the terminal.

It can be seen that, in this example, the terminal device can obtain a PLMN corresponding to the first PCI by receiving the system information block SIB corresponding to the first PCI, and send the correspondence between the first PCI and the PLMN to the network device when the PLMN belongs to the PLMN or the EPLMN of the terminal, so that the network device itself updates the first list; optionally, the terminal device may also update the first list maintained by itself, so that resource overhead for sending the first list may 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.

In accordance with the foregoing embodiments, please refer to fig. 5, fig. 5 is a schematic structural diagram of a terminal according to an embodiment of the present application, and as shown in the figure, the terminal includes a processor 510, a memory 520, a communication interface 530, and one or more programs 521, where the one or more programs 521 are stored in the memory and configured to be executed by the processor 510, and the programs include instructions for performing the following steps;

determining a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI), wherein the first PCI is used for identifying a first cell;

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

In one possible example, a 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 above-mentioned scheme of the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is understood that the terminal and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. 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 embodiment of the present application, the terminal and the network device may be divided according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit may be implemented in the form of hardware, or may be implemented in the form of a software program module. It should be noted that the division of the unit in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation.

In case of integrated units, fig. 6 shows a block diagram of a possible functional unit composition of the terminal involved in the above embodiments. The terminal 600 includes: a processing unit 602 and a communication unit 603. The processing unit 602 is configured to control and manage the actions of the terminal, for example, the processing unit 602 is configured to support the terminal to perform steps 201 and 202 in fig. 2, step 301 and 303 in fig. 3, step 401 and 407 in fig. 4, and/or other processes for the technologies described herein. The communication unit 603 is used to support communication between the terminal and other devices, for example, a network device shown in fig. 1. The terminal may further 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, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 603 may be a transceiver, a transmitting and receiving circuit, etc., and the storage unit 601 may be a memory.

Wherein the processing unit 602 is configured to determine a public land mobile network PLMN corresponding to a first physical cell identity PCI, where the first PCI is used to identify a first cell;

the communication unit 603 performs a cell selection or reselection procedure 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 the embodiment of the present application, the terminal may determine the PLMN of the cell identified by the measured PCI, and perform the cell selection or reselection process based on the cell identified by the PCI when the PLMN corresponding to the PCI is the PLMN or the EPLMN of the terminal, so as to avoid that the cell selection or reselection process cannot be completed due to the fact that the PLMN of the cell identified by the measured PCI does not belong to the PLMN or the EPLMN of the terminal, which is beneficial to ensuring the reliability of network access

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

and querying a PLMN corresponding to the first PCI from a first list, wherein 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 a public land mobile network PLMN corresponding to the first physical cell identity PCI, specifically: and acquiring a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI) from a System Information Block (SIB) corresponding to the first PCI.

In a possible example, the communication unit 603 is further configured to, when the PLMN corresponding to the first PCI belongs to a PLMN of the terminal or an equivalent public land mobile network EPLMN, send the determined PLMN corresponding to the first PCI to a network device, so that the network device updates or creates a first list, where 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 indicate that the terminal reports a 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, where the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

In a possible example, the processing unit 602 is further configured to add the first PCI to a list of cells to which access is forbidden for the terminal when the PLMN corresponding to the first PCI does not belong to the PLMN or the EPLMN of the terminal.

In a possible example, the processing unit 602 is further configured to determine a PLMN corresponding to a second PCI, where the second PCI is used to identify a second cell; the communication unit 603 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 the EPLMN of the terminal.

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 according to the embodiment of the present application may be the terminal shown in fig. 5.

The embodiment of the present application further provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the terminal in the above method embodiment.

The present application also provides a computer-readable storage medium, where the computer-readable storage medium stores a computer program for electronic data exchange, where the computer program makes a computer perform some or all of the steps described in the network device in the above method embodiments.

Embodiments of the present application also provide a computer program product, where 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 perform some or all of the steps described in the terminal in the above method embodiments. The computer program product may be a software installation package.

Embodiments of the present application also provide a computer program product, where 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 perform some or all of the steps described in the network device in the method. The computer program product may be a software installation package.

The steps of a method or algorithm described in the embodiments of the present application may be implemented in hardware, or may be implemented by a processor executing software instructions. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in an access network device, a target network device, or a core network device. Of course, the processor and the storage medium may reside as discrete components in an access network device, a target network device, or a core network device.

Those skilled in the art will appreciate that in one or more of the examples described above, the functionality 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 in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. 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 incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., Digital Video Disk (DVD)), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the embodiments of the present application in further detail, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present application, and are not intended to limit the scope of the embodiments of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of the embodiments of the present application.

Claims

1. A network access method, which is applied to a terminal that communicates in a new air interface NR system using an unlicensed spectrum, where cell deployment of multiple operators is allowed on a same carrier frequency of the unlicensed spectrum, the method includes:

the terminal determines a public land mobile network PLMN corresponding to a first Physical Cell Identity (PCI), wherein the first PCI is used for identifying a 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 executes a cell selection or reselection process based on the first cell;

and 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 sends the determined PLMN corresponding to the first PCI to network equipment so that the network equipment updates or creates a first list, wherein the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

2. The method of claim 1, wherein the terminal determines a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI), comprising:

and the terminal inquires a public land mobile network PLMN corresponding to the first physical cell identity PCI from the first list.

3. The method of claim 2, further comprising:

a terminal receives a first message, wherein 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.

4. The method of claim 1, wherein the terminal determines a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI), comprising:

the terminal acquires a public land mobile network PLMN corresponding to a first Physical Cell Identity (PCI) from a System Information Block (SIB) of the first PCI.

5. The method of claim 4, further comprising:

the terminal receives first indication information sent by network equipment, wherein the first indication information is used for indicating the terminal to report the PLMN corresponding to the first PCI.

6. The method according to claim 4 or 5, characterized in that the method further comprises:

and the terminal updates a first list based on the PLMN corresponding to the first PCI, wherein the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

7. The method of claim 6, further comprising:

and when the PLMN corresponding to the first PCI does not belong to the PLMN or the EPLMN of the terminal, the terminal adds the first PCI to a list of cells to which the terminal is forbidden to access.

8. The method of claim 7, further comprising:

the terminal determines a PLMN corresponding to a second PCI, wherein the second PCI is used for identifying a second cell;

and when the PLMN corresponding to the second PCI belongs to the PLMN or the EPLMN of the terminal, the terminal executes a cell selection or reselection process based on the second cell.

9. A terminal, wherein the terminal is applied in a new air interface NR system and uses an unlicensed spectrum for communication, and a cell deployment of multiple operators is allowed on a same carrier frequency of the unlicensed spectrum, and the terminal includes:

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

a communication unit, configured to perform a cell selection or reselection procedure based on the first cell when a PLMN corresponding to the first PCI belongs to a PLMN of the terminal or an equivalent public land mobile network EPLMN;

the communication unit is further configured to, when the PLMN corresponding to the first PCI belongs to a PLMN of the terminal or an equivalent public land mobile network EPLMN, send the determined PLMN corresponding to the first PCI to a network device, so that the network device updates or creates a first list, where the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

10. The terminal according to claim 9, wherein the processing unit determines a PLMN corresponding to the first PCI, specifically:

and querying the PLMN corresponding to the first PCI from the first list.

11. The terminal of claim 10, wherein the communication unit is further configured to receive a first message, and wherein 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.

12. The terminal of claim 9, wherein the processing unit determines a public land mobile network PLMN corresponding to the first physical cell identity PCI, specifically:

and acquiring a Public Land Mobile Network (PLMN) corresponding to a first Physical Cell Identity (PCI) from a System Information Block (SIB) corresponding to the first PCI.

13. The terminal of claim 12,

the communication unit is further configured to receive first indication information sent by a network device, where the first indication information is used to indicate that the terminal reports the PLMN corresponding to the first PCI.

14. The terminal according to claim 12 or 13,

the processing unit is further configured to update a first list based on the PLMN corresponding to the first PCI, where the first list stores one or more PCIs and one or more PLMNs corresponding to each PCI.

15. The terminal of claim 14,

the processing unit is further configured to add the first PCI to a list of cells to which access is prohibited for the terminal when the PLMN corresponding to the first PCI does not belong to the PLMN or the EPLMN of the terminal.

16. The terminal of claim 15,

the processing unit is further configured to determine a PLMN corresponding to a second PCI, where the second PCI is used to identify a 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 the EPLMN of the terminal.

17. A terminal comprising a processor, memory, a communication interface, and one or more programs stored in the memory and configured to be executed by the processor, the programs comprising instructions for performing the steps in the method of any of claims 1-8.

18. 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 perform the method according to any one of claims 1-8.