Terminal residence method and apparatus

Abstract

Provided in the present disclosure are a terminal residence method and apparatus. The method in the embodiments of the present disclosure comprises: when a pre-configured subnet replacement condition is satisfied or a first message sent by a first subnet in a communication network has been received, determining that a resident subnet needs to be replaced, wherein the first subnet is a subnet where a terminal has resided, and the terminal is in an idle state; and when a second subnet satisfies a residence condition, executing a residence operation in the second subnet, wherein the second subnet is a subnet that can be detected or found by the terminal in the communication network, and the second subnet is different from the first subnet.

Description

Terminal camping method and apparatus

[0001] The present disclosure claims priority from a Chinese patent application No. 202410525902.0 filed on April 29, 2024, and entitled "Terminal camping method and apparatus", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of communication, and particularly refers to a terminal camping method and apparatus. BACKGROUND

[0003] In the operator network in the related art, a terminal only selects the best cell in the cell corresponding to the operator network according to signal quality to camp on. After camping on a cell, the terminal leaves the currently camped cell and camps on another cell again when the cell reselection condition is met. In the 6th Generation mobile communication technology (6G) network, there will be a deployment scenario in which multiple subnets coexist, and different subnets can have different network management strategies. The cell switching in the related art is for switching between cells under the same network management strategy, and the cell switching scheme in the related art cannot be applied to the cell switching in the above-mentioned multiple subnet coexistence scenario. Therefore, the related art cannot realize switching between terminals in different subnets, and thus it is difficult to ensure that the energy efficiency of the entire operator network is optimal. SUMMARY

[0004] The present disclosure aims to provide a terminal camping method and apparatus to solve the problem of how to realize switching between terminals in different subnets.

[0005] To achieve the above-mentioned purpose, the present disclosure provides a terminal camping method, which is executed by a terminal, and the method comprises:

[0006] In a case where a preconfigured subnet replacement condition is met or a first message sent by a first subnet in a communication network is received, it is determined that the camping subnet needs to be replaced, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state;

[0007] It is determined whether a second subnet meets a camping condition, wherein the second subnet is a subnet that the terminal can detect or search in the communication network, and the second subnet is different from the first subnet;

[0008] In a case where the second subnet meets the camping condition, a camping operation in the second subnet is performed.

[0009] In some embodiments, the determining whether the second subnet satisfies the camping condition comprises:

[0010] determining whether the second subnet satisfies the camping condition according to a relationship between the signal strength of the second subnet and a signal strength threshold value and a cell selection or reselection criterion.

[0011] In some embodiments, the performing the camping operation in the second subnet in the case that the second subnet satisfies the camping condition comprises:

[0012] performing the camping operation in the second subnet in the case that the second subnet satisfies the camping condition and an identity of the second subnet is same as an identity of a target subnet.

[0013] wherein the target subnet is a subnet indicated by the first subnet for the terminal to replace.

[0014] In some embodiments, the identity of the second subnet or the identity of the target subnet is indicated by at least one of:

[0015] an M1th bit in first identity indication information configured by a network side, the first identity indication information comprising N1 bits, the N1 bits being used for indicating a radio access node identity, M1≤N1, and M1 and N1 are both positive integers;

[0016] an M2th bit in second identity indication information configured by the network side, the second identity indication information comprising N2 bits, the N2 bits being used for indicating a global cell identity, M2≤N2, and M2 and N2 are both positive integers;

[0017] an M3th bit in third identity indication information configured by the network side, the third identity indication information comprising N3 bits, the N3 bits being used for indicating a tracking area identity, M3≤N3, and M3 and N3 are both positive integers.

[0018] In some embodiments, the first message comprises at least one of:

[0019] an identity of at least one target subnet;

[0020] frequency information corresponding to the at least one target subnet;

[0021] a signal strength threshold value corresponding to the at least one target subnet;

[0022] priority information of the at least one target subnet;

[0023] a replacement factor;

[0024] a subnet replacement condition.

[0025] In some embodiments, when the first message comprises at least one of the replacement factor and the subnet replacement condition;

[0026] In a case where a first message sent by a first subnet in a communication network is received, it is determined that the residing subnet needs to be replaced, comprising:

[0027] In a case where the first message sent by the first subnet is received and the subnet replacement condition is satisfied, it is determined that the residing subnet needs to be replaced;

[0028] And / or, in a case where the first message sent by the first subnet is received and a random number generated by the terminal and the replacement factor satisfy a preset relationship, it is determined that the residing subnet needs to be replaced.

[0029] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0030] In some embodiments, the method of the embodiments of the present disclosure further comprises:

[0031] Initiating a registration procedure to the second subnet.

[0032] The embodiments of the present disclosure also provide a terminal registration method, which is performed by a network device of a first subnet, and the method comprises:

[0033] Sending a preconfigured subnet replacement condition or a first message to a terminal, the first message being used to inform the terminal to replace a residing subnet, wherein the first subnet is the residing subnet of the terminal, and the terminal is in an idle state; wherein the replaced residing subnet is a second subnet, the second subnet being a subnet that can be detected or searched by the terminal in the communication network and satisfying a registration condition, and the second subnet is different from the first subnet.

[0034] In some embodiments, the first message comprises at least one of the following:

[0035] An identifier of at least one target subnet, the target subnet being a subnet indicated by the first subnet for the terminal to replace;

[0036] Frequency information corresponding to the at least one target subnet;

[0037] A signal strength threshold value corresponding to the at least one target subnet;

[0038] Priority information of the at least one target subnet;

[0039] A replacement factor;

[0040] A subnet replacement condition.

[0041] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0042] In some embodiments, the first message is sent to the terminal, comprising:

[0043] obtaining a change-residence-subnet request message sent by the core network device;

[0044] According to the change-residence-subnet request message, the first message is sent to the terminal.

[0045] In some embodiments, the change-residence-subnet request message comprises at least one of:

[0046] an identifier of the terminal that needs to change the residence subnet;

[0047] an identifier of at least one target subnet, the target subnet being a subnet for the terminal to change;

[0048] frequency information corresponding to the at least one target subnet;

[0049] a signal strength threshold value corresponding to the at least one target subnet;

[0050] priority information of the at least one target subnet;

[0051] a change factor;

[0052] a subnet change condition.

[0053] The embodiments of the present disclosure further provide a terminal residence method, executed by a core network device, comprising:

[0054] sending a change-residence-subnet request message, the change-residence-subnet request message being used to instruct a first subnet to notify a terminal to change a residence subnet.

[0055] In some embodiments, the change-residence-subnet request message comprises at least one of:

[0056] an identifier of the terminal that needs to change the residence subnet;

[0057] an identifier of at least one target subnet, the target subnet being a subnet for the terminal to change;

[0058] frequency information corresponding to the at least one target subnet;

[0059] a signal strength threshold value corresponding to the at least one target subnet;

[0060] priority information of the at least one target subnet;

[0061] a change factor;

[0062] a subnet change condition.

[0063] The embodiment of the present disclosure further provides a terminal camping device, comprising a memory, a transceiver and a processor.

[0064] The memory is used for storing a computer program; the transceiver is used for transceiving data under the control of the processor; and the processor is used for reading the computer program in the memory and performing the following operations:

[0065] In a case where a pre-configured subnetwork replacement condition is met or a first message sent by a first subnetwork in a communication network is received, it is determined that a camping subnetwork needs to be replaced, wherein the first subnetwork is a subnetwork in which the terminal has camped, and the terminal is in an idle state;

[0066] It is determined whether a second subnetwork meets a camping condition, wherein the second subnetwork is a subnetwork that can be detected or searched by the terminal in the communication network, and the second subnetwork is different from the first subnetwork;

[0067] In a case where the second subnetwork meets the camping condition, a camping operation in the second subnetwork is performed.

[0068] In some embodiments, the processor further implements the following steps:

[0069] According to a relationship between a signal strength of the second subnetwork and a signal strength threshold value and a cell selection or reselection criterion, it is determined whether the second subnetwork meets the camping condition.

[0070] In some embodiments, the processor further implements the following steps:

[0071] In a case where the second subnetwork meets the camping condition and an identity of the second subnetwork is same as an identity of a target subnetwork, a camping operation in the second subnetwork is performed;

[0072] The target subnetwork is a subnetwork indicated by the first subnetwork for terminal replacement.

[0073] In some embodiments, the identity of the second subnetwork or the identity of the target subnetwork is indicated by at least one of the following:

[0074] An M1th bit in first identity indication information configured by a network side, wherein the first identity indication information comprises N1 bits, the N1 bits are used for indicating a radio access node identity, M1≤N1, and M1 and N1 are both positive integers;

[0075] An M2th bit in second identity indication information configured by the network side, wherein the second identity indication information comprises N2 bits, the N2 bits are used for indicating a global cell identity, M2≤N2, and M2 and N2 are both positive integers;

[0076] The M3th bit in the third identification indication information configured by the network side, the third identification indication information includes N3 bits, the N3 bits are used for indicating tracking area identification, M3≤N3, and M3 and N3 are positive integers.

[0077] In some embodiments, the first message includes at least one of the following:

[0078] An identification of at least one target subnet;

[0079] Frequency information corresponding to the at least one target subnet;

[0080] A signal strength threshold value corresponding to the at least one target subnet;

[0081] Priority information of the at least one target subnet;

[0082] A replacement factor;

[0083] A subnet replacement condition.

[0084] In some embodiments, when the first message includes at least one of the replacement factor and the subnet replacement condition;

[0085] The processor further implements the following steps:

[0086] Upon receiving the first message sent by the first subnet and the subnet replacement condition being satisfied, it is determined that the resident subnet needs to be replaced;

[0087] And / or, upon receiving the first message sent by the first subnet and the random number generated by the terminal and the replacement factor satisfying a preset relationship, it is determined that the resident subnet needs to be replaced.

[0088] In some embodiments, the first message includes a system message or a radio resource control (RRC) message.

[0089] In some embodiments, the processor further implements the following steps:

[0090] Initiating a resident registration process to the second subnet.

[0091] Embodiments of the present disclosure also provide a terminal resident device, including a memory, a transceiver, and a processor.

[0092] The memory is configured to store a computer program; the transceiver is configured to transceive data under the control of the processor; and the processor is configured to read the computer program in the memory and perform the following operations:

[0093] sending a preconfigured subnet switching condition or a first message to a terminal, the first message being used to inform the terminal to switch a camping subnet, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; wherein the switched camping subnet is a second subnet, the second subnet being a subnet that the terminal can detect or search in the communication network and that meets a camping condition, and the second subnet is different from the first subnet.

[0094] In some embodiments, the first message comprises at least one of:

[0095] an identity of at least one target subnet, the target subnet being a subnet indicated by the first subnet for the terminal to switch;

[0096] frequency information corresponding to the at least one target subnet;

[0097] a signal strength threshold value corresponding to the at least one target subnet;

[0098] priority information of the at least one target subnet;

[0099] a switching factor;

[0100] a subnet switching condition.

[0101] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0102] In some embodiments, the processor further implements the following steps:

[0103] obtaining a request message for switching a camping subnet sent by a core network device;

[0104] sending the first message to the terminal according to the request message for switching the camping subnet.

[0105] In some embodiments, the request message for switching the camping subnet comprises at least one of:

[0106] an identity of the terminal that needs to switch the camping subnet;

[0107] an identity of at least one target subnet, the target subnet being a subnet for the terminal to switch;

[0108] frequency information corresponding to the at least one target subnet;

[0109] a signal strength threshold value corresponding to the at least one target subnet;

[0110] priority information of the at least one target subnet;

[0111] a switching factor;

[0112] a subnet switching condition.

[0113] The embodiment of the present disclosure further provides a terminal camping device, comprising:

[0114] The first determining unit is configured to determine that the camping subnetwork needs to be changed in a case where a preconfigured subnetwork changing condition is met or a first message sent by a first subnetwork in the communication network is received, wherein the first subnetwork is a subnetwork in which the terminal has camped, and the terminal is in an idle state.

[0115] The second determining unit is configured to determine whether a second subnetwork meets a camping condition, wherein the second subnetwork is a subnetwork that the terminal can detect or search in the communication network, and the second subnetwork is different from the first subnetwork.

[0116] The executing unit is configured to perform a camping operation in the second subnetwork in a case where the second subnetwork meets the camping condition.

[0117] The embodiment of the present disclosure further provides a terminal camping device, comprising:

[0118] The sending unit is configured to send a preconfigured subnetwork changing condition or a first message to a terminal, wherein the first message is used to inform the terminal to change a camping subnetwork, the first subnetwork is a subnetwork in which the terminal has camped, and the terminal is in an idle state; wherein the changed camping subnetwork is a second subnetwork, the second subnetwork is a subnetwork that the terminal can detect or search in the communication network, and meets a camping condition, and the second subnetwork is different from the first subnetwork.

[0119] The embodiment of the present disclosure further provides a terminal camping device, comprising:

[0120] The transceiving unit is configured to send a camping subnetwork changing request message.

[0121] The embodiment of the present disclosure further provides a processor readable storage medium, which stores a computer program, and the computer program is used to make the processor execute steps of the terminal camping method.

[0122] The embodiment of the present disclosure further provides a computer program product, which comprises computer instructions, and the computer instructions are executed by a processor to realize steps of the terminal camping method.

[0123] The above technical solution of the present disclosure has at least the following beneficial effects:

[0124] In the embodiments of the present disclosure, in a case that a preconfigured subnetwork replacement condition is met or a first message sent by a first subnetwork in a communication network is received, the terminal determines that the terminal needs to replace a resident subnetwork, and the terminal is in an idle state; it is determined whether a second subnetwork meets a resident condition; in a case that the second subnetwork meets the resident condition, a resident operation in the second subnetwork is performed. Thus, the purpose of changing the subnetwork in which the terminal resides is achieved, that is, the purpose of switching the terminal between different subnetworks is achieved, and by controlling the terminal to switch between different subnetworks, the number of terminals residing in different subnetworks can be adjusted, and thus the purpose of adjusting the paging or access load of different subnetworks is achieved, and the energy efficiency of the entire operation network is effectively ensured to be optimal. BRIEF DESCRIPTION OF DRAWINGS

[0125] FIG. 1 shows a structure diagram of a network system to which embodiments of the present disclosure can be applied;

[0126] FIG. 2 shows a wireless network architecture based on a service interface representation;

[0127] FIG. 3 shows a flowchart of a terminal resident method according to an embodiment of the present disclosure;

[0128] FIG. 4 shows a flowchart of a terminal resident method according to an embodiment of the present disclosure;

[0129] FIG. 5 shows an interaction diagram of a terminal resident method according to an embodiment of the present disclosure;

[0130] FIG. 6 shows an interaction diagram of a terminal resident method according to an embodiment of the present disclosure;

[0131] FIG. 7 shows an interaction diagram of a terminal resident method according to an embodiment of the present disclosure;

[0132] FIG. 8 shows an interaction diagram of a terminal resident method according to an embodiment of the present disclosure;

[0133] FIG. 9 shows a structure block diagram of a terminal resident apparatus according to an embodiment of the present disclosure;

[0134] FIG. 10 shows a structure block diagram of a terminal resident apparatus according to an embodiment of the present disclosure;

[0135] FIG. 11 shows a module diagram of a terminal resident apparatus according to an embodiment of the present disclosure;

[0136] FIG. 12 shows a module diagram of a terminal resident apparatus according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0137] With reference to the drawings and briefly describing the technical solutions in the embodiments of the present disclosure, the following clearly and completely describes the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present disclosure.

[0138] The terms "first", "second", and the like in the description and claims of the present disclosure are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present disclosure described herein can be implemented in other sequences than those illustrated or described herein. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or apparatus that comprises a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products, or apparatuses.

[0139] In the embodiments of the present disclosure, the term "and / or" describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents an "or" relationship between the associated objects. In the embodiments of the present disclosure, the term "a plurality of" means two or more, and other quantifiers are similar.

[0140] In the embodiments of the present disclosure, the words "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present disclosure should not be interpreted as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0141] FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present disclosure can be applied. The wireless communication system includes a terminal device 11 and a network side device (or network device) 12. The terminal device 11 can also be referred to as a terminal or a user terminal (User Equipment, UE). It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present disclosure. The network side device 12 can be a base station or a core network. It should be noted that in the embodiments of the present disclosure, only a base station in an NR system is taken as an example, but the specific type of the base station is not limited.

[0142] In order for those skilled in the art to better understand the embodiments of the present disclosure, the following is first described.

[0143] I. 5th Generation mobile communication technology (5G) system message handling

[0144] System Information (SI) consists of one Master Information Block (MIB) and multiple System Information Blocks (SIBs), which can be divided into minimum SI and other SI:

[0145] (1) Minimum SI includes basic information required for initial access and information to acquire any other SI. The minimum SI includes:

[0146] MIB, MIB contains cell barring information required to receive further system information and basic physical layer information of the cell, such as Coreset#0 configuration. MIB is periodically broadcast on the Broadcast Channel (BCH).

[0147] SIB1, SIB1 defines the scheduling of other system information blocks and contains information required for initial access. SIB1 is also called Remaining Minimum SI, i.e. Remaining Minimum System Information (RMSI), and is periodically broadcast on the Downlink Synchronization Channel (DL-SCH) or sent to UEs in RRC_CONNECTED in a dedicated manner on the DL-SCH.

[0148] Other SI, Other SI includes all SIBs not broadcast in the minimum SI.

[0149] (II) 5G terminal camping cell process

[0150] 1. Cell search is an important process for terminal access to wireless network, through synchronization with base station and establishment of connection with network.

[0151] 2. 5G cell synchronization process, including:

[0152] When starting up or entering a new area, the terminal scans the available frequency range to detect synchronization signal / physical broadcast channel signal block (SSB) from different base stations, searches for SSB to identify available 5G cells; once the UE detects the SSB, it performs frequency and time synchronization; after synchronization, the UE demodulates the reference signal (DMRS) in the SSB to help the UE estimate the channel characteristics and cell identity; then, the UE decodes the MIB and SIB information, and can obtain information about high-layer parameters, such as cell-specific information, neighboring cells, and broadcast scheduling.

[0153] 3. The terminal performs cell selection, and initiates a wireless connection after cell selection; wherein:

[0154] Cell selection refers to: the UE evaluates the characteristics of each cell according to the decoded information, and selects the most suitable cell to camp on.

[0155] Initiating a wireless connection refers to: the UE establishes a radio resource control (RRC) connection with the selected cell to complete the initial access process and prepare for further communication with the network.

[0156] (Three) service-based architecture;

[0157] The 5G system architecture includes a set of network functions (NFs). NF is a processing function in the system, which defines the functional behavior and interface. NF can be implemented as a network element on a dedicated hardware, or as a software instance running on a dedicated hardware, or as a virtualized function instantiated on a platform, such as a cloud infrastructure. The 5G system architecture is defined as a service-based architecture, that is, a system architecture that implements system functions by providing services to other authorized NFs to access its services through a set of NFs. NF service is a function exposed by an NF (as an NF service producer) to other authorized NFs (as an NF service consumer) through a service-based interface. One NF service can support one or more NF service operations. An NF can provide different NF services.

[0158] The interaction between network functions is represented in two ways: service-based representation, reference point representation. For service-based representation, one network function allows other authorized network functions to access its services. The reference point representation shows the interaction between two network functions described by a point-to-point reference point between the two network functions.

[0159] As shown in FIG. 2, the wireless network architecture based on the service interface representation.

[0160] wherein Na, Nb, Nc correspond to the service-based interfaces of the first, second, and third network functions, respectively.

[0161] The radio network function (RNF) mainly includes: radio resource management, establishment / deletion of a radio connection, session management, measurement control, scheduling and transmission of certain system messages, and the like.

[0162] The terminal camping method provided by the embodiments of the present disclosure will be described in detail below in combination with the accompanying drawings, some embodiments, and application scenarios thereof.

[0163] As shown in FIG. 3, the embodiments of the present disclosure provide a terminal camping method, which is executed by a terminal, and the method comprises:

[0164] Step 301: In a case where a preconfigured subnetwork replacement condition is met or a first message sent by a first subnetwork in a communication network is received, it is determined that a camping subnetwork needs to be replaced, wherein the first subnetwork is a subnetwork in which the terminal has camped, and the terminal is in an idle state.

[0165] In some embodiments, the communication network is an operator network, and the operator network comprises at least two subnetworks, each of which can have an independent network management policy, for example, an independent location area management policy for an idle state terminal.

[0166] In some embodiments, each subnetwork has a unique subnetwork identifier, which can be broadcasted in the system information of a cell of the subnetwork.

[0167] In the embodiments of the present disclosure, the terminal can obtain the preconfigured subnetwork replacement condition through the network (such as air interface control signaling) or the operator (such as application information provided by the operator).

[0168] The preconfigured subnetwork replacement condition includes a mobile speed threshold, an activity level, and the like. In some embodiments, the subnetwork replacement condition can further include at least one of the following: an identifier of a target subnetwork, frequency information corresponding to the target subnetwork, a signal strength threshold value corresponding to the target subnetwork, and priority information of the target subnetwork.

[0169] The first message can be sent by an RNF in the first subnetwork, and the first message is used to notify the terminal to replace the camping subnetwork.

[0170] Step 302: Determine whether a second subnetwork meets a camping condition, wherein the second subnetwork is a subnetwork that the terminal can detect or search in the communication network, and the second subnetwork is different from the first subnetwork.

[0171] The second subnetwork can be a subnetwork of a specified frequency.

[0172] In some embodiments, the second subnet can also be one of the target subnets indicated by the first subnet.

[0173] In addition, the terminal can preferentially select a subnet with a higher priority when selecting a second subnet from the searched subnets.

[0174] In a case where the terminal in the idle state determines that the resident subnet needs to be changed, it is determined whether the second subnet meets the resident condition, so as to subsequently reside in the second subnet.

[0175] Step 303: In a case where the second subnet meets the resident condition, a resident operation in the second subnet is performed.

[0176] Here, in a case where the second subnet meets the resident condition, the resident subnet of the terminal is changed from the first subnet to the second subnet.

[0177] In the above scheme, in a case where a preconfigured subnet changing condition is met or a first message sent by the first subnet in the communication network is received, the terminal determines that the resident subnet needs to be changed, and the terminal is in the idle state; it is determined whether the second subnet meets the resident condition; in a case where the second subnet meets the resident condition, a resident operation in the second subnet is performed. Thus, the purpose of changing the resident subnet of the terminal is achieved, that is, the purpose of switching the terminal between different subnets is achieved, and by controlling the terminal to switch between different subnets, the number of terminals residing in different subnets can be adjusted, and thus the purpose of adjusting the paging or access load of different subnets is achieved, effectively ensuring that the energy efficiency of the entire operation network reaches the best.

[0178] In some embodiments, as an implementation manner, the determination of whether the second subnet meets the resident condition comprises:

[0179] According to the relationship between the signal strength of the second subnet and the signal strength threshold value and the cell selection or reselection criterion, it is determined whether the second subnet meets the resident condition.

[0180] Specifically, the terminal measures the signal of the second subnet to obtain the signal strength of the second subnet; then compares the measured signal strength of the second subnet with the signal strength threshold value to obtain a comparison result; and based on the comparison result, the cell selection or reselection criterion (such as the S criterion for cell selection or the R criterion for cell reselection), it is determined whether the second subnet meets the resident condition.

[0181] In this implementation, whether the second subnetwork meets the camping condition is determined based on a relationship between a signal strength of the second subnetwork and a signal strength threshold value and a selection or reselection criterion, and after the signal strength of the second subnetwork meets the S criterion or the R criterion, the second subnetwork can be selected as a subnetwork for camping of the terminal.

[0182] In some embodiments, in a case where the second subnetwork meets the camping condition, a camping operation in the second subnetwork is performed, including:

[0183] In a case where the second subnetwork meets the camping condition and an identity of the second subnetwork is the same as an identity of the target subnetwork, a camping operation in the second subnetwork is performed.

[0184] The target subnetwork is indicated by the first subnetwork for the terminal to replace.

[0185] In the embodiments of the present disclosure, the first subnetwork can indicate at least one target subnetwork.

[0186] Here, in a case where the first subnetwork indicates a subnetwork for the terminal to replace, the second subnetwork selected by the terminal and meeting the camping condition also needs to be the same as the target subnetwork indicated by the first subnetwork to perform the camping operation in the second subnetwork, which achieves the purpose of further selecting a subnetwork for the terminal to camp based on the indication of the network side.

[0187] In some embodiments, the identity of the second subnetwork or the identity of the target subnetwork is indicated by at least one of the following:

[0188] The first item: the M1th bit in first identity indication information configured by the network side, the first identity indication information includes N1 bits, the N1 bits are used to indicate a wireless access node identity, M1≤N1, and M1 and N1 are both positive integers.

[0189] It is assumed that the wireless access node identity is composed of a public land mobile network identity (PLMN ID) + a subnetwork ID + a 6G node (Node) ID. The N1 bits include 5 bits, wherein the first bit and the second bit are used to indicate the PLMN ID, the third bit is used to indicate the subnetwork ID, and the fourth bit is used to indicate the 6G node Node ID. That is, the 5 bits are used to indicate the wireless access node identity, and the third bit (i.e., M1=3) in the 5 bits is used to indicate the identity of the second subnetwork or the target subnetwork.

[0190] In this item, the identity of the second subnetwork or the target subnetwork is indicated by part of the bits in the first identity indication information used to indicate the wireless access node identity.

[0191] The second item: an M2th bit in second identity indication information configured by the network side, the second identity indication information includes N2 bits, the N2 bits are used for indicating a global cell identity, M2≤N2, and M2 and N2 are positive integers.

[0192] It is assumed that the global cell identity is composed of a PLMN ID, a subnet ID, a 6G node ID, and a 6G cell ID. The N2 bits include 6 bits, wherein the first bit is used for indicating the PLMN ID, the second bit is used for indicating the subnet ID, the third bit and the fourth bit are used for indicating the 6G node ID, and the fifth bit is used for indicating the 6G cell ID. That is, the 6 bits are used for indicating the global cell identity, and the second bit (i.e., M2=2) in the 6 bits is used for indicating the identity of the second subnet or the target subnet.

[0193] In this item, the identity of the second subnet or the target subnet is indicated by part of the bits in the second identity indication information used for indicating the global cell identity.

[0194] The third item: an M3th bit in third identity indication information configured by the network side, the third identity indication information includes N3 bits, the N3 bits are used for indicating a tracking area identity, M3≤N3, and M3 and N3 are positive integers.

[0195] It is assumed that the tracking area identity is composed of a PLMN ID, a subnet ID, and a 6G tracking area code (TAC). The N3 bits include 6 bits, wherein the first bit and the second bit are used for indicating the PLMN ID, the third bit is used for indicating the subnet ID, and the fourth bit, the fifth bit, and the sixth bit are used for indicating the 6G TAC. That is, the 6 bits are used for indicating the tracking area identity, and the third bit (i.e., M3=3) in the 6 bits is used for indicating the identity of the second subnet or the target subnet.

[0196] In this item, the identity of the second subnet or the target subnet is indicated by part of the bits in the third identity indication information used for indicating the tracking area identity.

[0197] It should be noted that the first identity indication information, the second identity indication information, and / or the third identity indication information can also be determined by a protocol or the terminal itself.

[0198] In some embodiments, the first message includes at least one of the following:

[0199] The A1 item: the identity of at least one target subnet.

[0200] The target subnet is indicated by the first subnet for the terminal to replace, i.e., the subnet (such as the second subnet described above) determined by the terminal to replace needs to be the same as the target subnet.

[0201] As an implementation manner, in a case where the first message includes the identification of the at least one target subnet, the determining whether the second subnet meets the camping condition includes: selecting a second subnet from the at least one target subnet, and determining whether the second subnet meets the camping condition.

[0202] A2: frequency information corresponding to the at least one target subnet.

[0203] By providing the frequency information corresponding to the target subnet, the terminal can measure the signal of the corresponding frequency.

[0204] A3: a signal strength threshold value corresponding to the at least one target subnet.

[0205] Here, by providing the signal strength threshold value, the terminal can compare the measured signal strength of the target subnet with the signal strength threshold value when selecting the second subnet from the target subnet, and further determine whether the subnet meets the camping condition.

[0206] A4: priority information of the at least one target subnet.

[0207] Here, by providing the priority information of the target subnet, the terminal can select according to the priority when selecting the second subnet from the target subnet, for example, preferentially selecting a target subnet with a higher priority as the second subnet.

[0208] A5: a replacement factor.

[0209] In the embodiments of the present disclosure, the terminal compares the replacement factor with a random number generated by itself, and if the two are consistent, it is determined that the camping subnet needs to be replaced.

[0210] A6: a subnet replacement condition.

[0211] The subnet replacement condition can be for a terminal with a specific feature or for a terminal with a specific capability, such as a terminal moving at a high or low speed, a terminal whose activity level meets a certain condition, or a terminal supporting a non-terrestrial network (NTN).

[0212] For example, the first message can include the A1, A5, and A6 described above, or include the A1 and A5, or include the A1 and A6, or include the A1 and at least one of the A2 to A6.

[0213] By the first message, the terminal is enabled to select a suitable subnetwork for camping based on the cell selection or reselection criteria and the requirement indicated by the network side.

[0214] In some embodiments, when the first message comprises at least one of the replacement factor and the subnetwork replacement condition;

[0215] Upon receiving the first message sent by the first subnetwork in the communication network, it is determined that the camping subnetwork needs to be replaced, comprising:

[0216] Upon receiving the first message sent by the first subnetwork and the subnetwork replacement condition being satisfied, it is determined that the camping subnetwork needs to be replaced.

[0217] And / or, upon receiving the first message sent by the first subnetwork and the random number generated by the terminal satisfying a preset relationship with the replacement factor, it is determined that the camping subnetwork needs to be replaced.

[0218] For example, the random number is less than or equal to the replacement factor, or the random number is greater than or equal to the replacement factor.

[0219] When the first message provides at least one of the replacement factor and the subnetwork replacement condition, the terminal needs to determine whether the camping subnetwork needs to be replaced based on at least one of the replacement factor and the subnetwork replacement condition.

[0220] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0221] In the embodiments of the present disclosure, the first subnetwork can broadcast the first message through a system message, or send the first message through an RRC message.

[0222] When the first subnetwork sends the first message through an RRC message, the terminal establishes or resumes an RRC connection with the first subnetwork, and acquires the first message through an RRC message after the RRC connection is established or resumed.

[0223] In some embodiments, the method of the embodiments of the present disclosure further comprises:

[0224] Initiating a camping registration procedure to the second subnetwork.

[0225] In the embodiments of the present disclosure, after the terminal performs the camping operation in the second subnetwork, a camping registration procedure is initiated to the second subnetwork, for example, a location area update request is sent to the second subnetwork, and new location area list information sent by the second subnetwork is acquired.

[0226] In the scheme of the embodiments of the present disclosure, when the terminal resides in a first subnetwork (such as subnetwork A), the network side can explicitly or implicitly inform the terminal to change the residing subnetwork (such as residing in subnetwork B) and update the corresponding location area management information. Specifically, in the explicit manner, the notification information at least contains the ID information of subnetwork B. In the implicit manner, the frequency information corresponding to subnetwork B can be set as a high priority of cell reselection, so as to ensure that the terminal can reside in the subnetwork B after performing cell reselection.

[0227] The terminal residing method of the embodiments of the present disclosure achieves the purpose of changing the residing subnetwork of the terminal, so as to adjust the number of terminals residing in different subnetworks, and further achieves the purpose of adjusting the paging or access load of different subnetworks, and effectively ensures that the energy efficiency of the entire operation network reaches the best.

[0228] As shown in FIG. 4, the embodiments of the present disclosure provide a terminal residing method, which is executed by a network device (such as RNF) of a first subnetwork, and the method comprises the following steps:

[0229] Step 401: sending a preconfigured subnetwork changing condition or a first message to the terminal, the first message being used to inform the terminal to change the residing subnetwork, wherein the first subnetwork is the subnetwork in which the terminal has resided, and the terminal is in an idle state.

[0230] The network device of the first subnetwork sends the preconfigured subnetwork changing condition or the first message to the terminal, the terminal determines that the residing subnetwork needs to be changed in the case that the preconfigured subnetwork changing condition is met or the first message is received, and determines whether a second subnetwork meets a residing condition, and performs a residing operation in the second subnetwork in the case that the second subnetwork meets the residing condition. That is, the changed residing subnetwork is the second subnetwork, the second subnetwork is a subnetwork that the terminal can detect or search in the communication network and meets the residing condition, and the second subnetwork is different from the first subnetwork.

[0231] The preconfigured subnetwork changing condition includes a moving speed threshold, an activity level, etc. In some embodiments, the subnetwork changing condition can further include at least one of the following: an identification of a target subnetwork, frequency information corresponding to the target subnetwork, a signal strength threshold value corresponding to the target subnetwork, and priority information of the target subnetwork.

[0232] The first message can be specifically sent by RNF in the first subnetwork.

[0233] In the embodiments of the present disclosure, the first subnetwork sends a preconfigured subnetwork replacement condition or a first message to the terminal, the first message being used to inform the terminal to replace the residing subnetwork, so that the terminal determines whether the second subnetwork meets the residing condition based on the preconfigured subnetwork replacement condition or the first message in the case that the terminal determines that the residing subnetwork needs to be replaced; and in the case that the second subnetwork meets the residing condition, the residing operation in the second subnetwork is performed. Thus, the purpose of changing the subnetwork in which the terminal resides is achieved, that is, the purpose of switching the terminal between different subnetworks is achieved, and by controlling the terminal to switch between different subnetworks, the number of terminals residing in different subnetworks can be adjusted, and thus the purpose of adjusting the paging or access load of different subnetworks is achieved, and the energy efficiency of the entire operation network is effectively ensured to be optimal.

[0234] In some embodiments, the first message comprises at least one of the following:

[0235] Item B1: identification of at least one target subnetwork, the target subnetwork being the subnetwork indicated by the first subnetwork for the terminal to replace.

[0236] As an implementation manner, in the case that the first message comprises the identification of the at least one target subnetwork, the determination of whether the second subnetwork meets the residing condition comprises: selecting one second subnetwork from the at least one target subnetwork, and determining whether the second subnetwork meets the residing condition.

[0237] Item B2: frequency information corresponding to the at least one target subnetwork.

[0238] By providing the frequency information corresponding to the target subnetwork, the terminal can measure the signal of the corresponding frequency.

[0239] Item B3: signal strength threshold value corresponding to the at least one target subnetwork.

[0240] Here, by providing the signal strength threshold value, the terminal can compare the measured signal strength of the target subnetwork with the signal strength threshold value in the case that the second subnetwork is selected from the target subnetwork, and then determine whether the subnetwork meets the residing condition.

[0241] Item B4: priority information of the at least one target subnetwork.

[0242] Here, by providing the priority information of the target subnetwork, the terminal can select the second subnetwork according to the priority when the second subnetwork is selected from the target subnetwork, for example, the target subnetwork with a higher priority is preferentially selected as the second subnetwork.

[0243] Item B5: replacement factor.

[0244] In the embodiments of the present disclosure, the terminal compares the replacement factor with the random number generated by itself, and if the two are consistent, it is determined that the resident subnet needs to be replaced.

[0245] Item B6: Subnet replacement condition.

[0246] The subnet replacement condition can be for terminals with specific features or for terminals with specific capabilities. For example, the specific feature can be a high-speed or low-speed mobile terminal, and the terminal's activity level meets certain conditions. The specific capability can be a terminal supporting a non-terrestrial network (NTN).

[0247] For example, the first message can include the above-mentioned items B1, B5 and B6, or include the above-mentioned items B1 and B5, or include the above-mentioned items B1 and B6, or include the above-mentioned item B1 and at least one of the above-mentioned items B2 to B6.

[0248] Through the above-mentioned first message, the terminal can select a suitable subnet for residence based on the cell selection or reselection criteria and the requirements indicated by the network side.

[0249] In some embodiments, the first message includes a system message or a radio resource control (RRC) message.

[0250] In the embodiments of the present disclosure, the first subnet can broadcast the above-mentioned first message through a system message, or send the above-mentioned first message through an RRC message.

[0251] In the case where the first subnet sends the above-mentioned first message through an RRC message, the terminal establishes or resumes an RRC connection with the first subnet, and obtains the above-mentioned first message through an RRC message after establishing or resuming the RRC connection.

[0252] In some embodiments, the first message is sent to the terminal, including:

[0253] Obtaining a replacement resident subnet request message sent by the core network device;

[0254] According to the replacement resident subnet request message, the first message is sent to the terminal.

[0255] In some embodiments, the above-mentioned core network device is an access and mobility management function (AMF). The core network device registers the user information in each subnet registration area within the control range, and determines whether to trigger the replacement resident subnet operation of some terminals to ensure that the energy efficiency of the entire operation network is optimal. For example, if the number of users registered in subnet 1 is greater than a preset threshold, the replacement subnet operation of some terminals in subnet 1 can be triggered.

[0256] The first subnet sends the first message to the terminal to inform the terminal to change the resident subnet after receiving the change resident subnet request message of the core network device, and sends a change resident subnet response message to the core network device.

[0257] In some embodiments, the change resident subnet request message comprises at least one of the following:

[0258] C1: the identification of the terminal that needs to change the resident subnet.

[0259] Here, the identification of the terminal is indicated so that the first subnet sends the first message to the corresponding terminal.

[0260] C2: the identification of at least one target subnet, which is the subnet for the terminal to change;

[0261] C3: the frequency information corresponding to the at least one target subnet;

[0262] C4: the signal strength threshold value corresponding to the at least one target subnet;

[0263] C5: the priority information of the at least one target subnet;

[0264] C6: the change factor;

[0265] C7: the subnet change condition.

[0266] The content in the first message can be obtained based on the content in the change resident subnet request message. The content other than C1 has been described in the above description and will not be repeated here.

[0267] In the embodiments of the present disclosure, the first subnet sends the preconfigured subnet change condition or the first message to the terminal, and the first message is used to inform the terminal to change the resident subnet. When the terminal determines that the resident subnet needs to be changed based on the preconfigured subnet change condition or the first message, the terminal further determines whether the second subnet meets the resident condition. When the second subnet meets the resident condition, the terminal performs the resident operation in the second subnet. Thus, the purpose of changing the resident subnet of the terminal is achieved, i.e., the purpose of switching the terminal between different subnets is achieved. By controlling the terminal to switch between different subnets, the number of terminals residing in different subnets can be adjusted, and the purpose of adjusting the paging or access load of different subnets can be achieved, thereby effectively ensuring that the energy efficiency of the entire operation network reaches the best.

[0268] The terminal resident method of the present disclosure will be described in detail below in combination with embodiments.

[0269] Embodiment one: assuming that the first subnetwork in which the terminal currently resides is subnetwork A (also described as subnetwork A), and the first message is a system message, as shown in FIG. 5, the process includes:

[0270] Step 0: subnetwork A decides to let the terminal change the resident subnetwork.

[0271] Step 1: the RNF of subnetwork A sends a system message, which is used to inform the terminal to change the resident subnetwork.

[0272] The system message is specifically SIB.

[0273] In some embodiments, the first message includes at least one of the following:

[0274] The identification of at least one target subnetwork, which can be presented in the form of a list;

[0275] The frequency information corresponding to the at least one target subnetwork;

[0276] The signal strength threshold value corresponding to the at least one target subnetwork;

[0277] The priority information of the at least one target subnetwork;

[0278] The change factor;

[0279] The subnetwork change condition.

[0280] Step 2: after the UE receives the corresponding system information, if the system message contains the change factor and / or the subnetwork change condition, it determines whether the resident subnetwork needs to be changed according to the change factor and / or the subnetwork change condition; if the system message does not contain the change factor and the subnetwork change condition, it directly determines that the resident subnetwork needs to be changed.

[0281] For example, the subnetwork change condition is that the terminal is a terminal with a specific feature or a terminal with a specific capability, such as a terminal with high or low speed, a terminal whose activity level meets certain conditions, or a terminal supporting NTN. If the terminal has the above-mentioned specific feature or specific capability, it is determined that the subnetwork change condition is met, and it is further determined that the resident subnetwork needs to be changed.

[0282] For another example, the terminal compares the random number generated by itself with the change factor, and if the size relationship between the two satisfies a preset relationship, it is determined that the resident subnetwork needs to be changed.

[0283] Of course, the above-mentioned subnetwork change condition can also be other change conditions, which are not specifically limited by the present disclosure.

[0284] Step 3: In the case that the terminal determines that the resident subnet needs to be changed, the signal strength of the subnet B (the second subnet) is measured, and whether the subnet B meets the resident condition is judged based on the measured signal strength.

[0285] The frequency of the above-mentioned subnet B is a specified frequency that can be searched by the terminal, and here, in the case that the terminal determines that the resident subnet needs to be changed, the UE measures the signal strength of the specified frequency, and judges whether the subnet B meets the resident condition according to the signal threshold related information and the S criterion of cell selection or the R criterion in cell reselection.

[0286] Step 4: When the subnet B meets the resident condition, the subnet identification information broadcast by the subnet B is received.

[0287] Step 5: If the subnet identification of the subnet B is consistent with the identification of the target subnet indicated by the subnet A, the subsequent resident operation in the subnet B is performed;

[0288] Step 6: The UE performs the re-registration process through the subnet B.

[0289] This step 6 is an optional step.

[0290] In this embodiment, the subnet A informs the terminal to change the resident subnet through the system message, and in the case that the terminal determines that the resident subnet needs to be changed based on the system message, it is determined whether the subnet B meets the resident condition; in the case that the subnet B meets the resident condition, the resident operation in the subnet B is performed. Thus, the purpose of changing the resident subnet of the terminal is achieved, so that the number of terminals residing in different subnets can be adjusted, and the purpose of adjusting the paging or access load of different subnets is achieved, effectively ensuring that the energy efficiency of the entire operation network reaches the best.

[0291] Embodiment two: assuming that the first subnet currently resided by the terminal is the subnet A (also described as the subnet A), and the above-mentioned first message is an RRC message, as shown in FIG. 6, the process includes:

[0292] Step 0: The subnet A decides to let the terminal change the resident subnet.

[0293] Step 1: The subnet A initiates a paging message for the terminal.

[0294] Step 2: The terminal establishes an RRC connection or resumes an RRC connection with the subnet A based on the paging message.

[0295] Step 3: The subnet A sends an RRC message to the terminal, and the RRC message is used to inform the terminal to change the resident subnet.

[0296] The RRC message can be an RRC release message, of course, it can also be other RRC messages, and the present disclosure does not make specific limitation on this.

[0297] In some embodiments, the RRC message comprises at least one of:

[0298] an identity of at least one target subnet, which can be presented in the form of a list;

[0299] frequency information corresponding to the at least one target subnet;

[0300] a signal strength threshold value corresponding to the at least one target subnet;

[0301] priority information of the at least one target subnet;

[0302] a replacement factor;

[0303] a subnet replacement condition.

[0304] Step 4: After receiving the corresponding RRC message, if the RRC message contains the replacement factor and / or the subnet replacement condition, the terminal determines whether to replace the resident subnet according to the replacement factor and / or the subnet replacement condition; if the RRC message does not contain the replacement factor and the subnet replacement condition, the terminal directly determines to replace the resident subnet.

[0305] For example, the subnet replacement condition is that the terminal is a terminal with a specific feature or a terminal with a specific capability, such as a terminal with high or low speed, a terminal with a certain degree of activity, or a terminal supporting NTN. If the terminal has the above-mentioned specific feature or specific capability, it is determined that the subnet replacement condition is met, and it is further determined that the resident subnet needs to be replaced.

[0306] For another example, the terminal compares a random number generated by itself with the replacement factor, and if the size relationship between the two satisfies a preset relationship, it is determined that the resident subnet needs to be replaced.

[0307] Of course, the above-mentioned subnet replacement condition can also be other replacement conditions, which are not limited in the present disclosure.

[0308] Step 5: In the case where the terminal determines that the resident subnet needs to be replaced, the signal strength of subnet B (the second subnet) is measured, and it is determined whether subnet B meets the resident condition based on the measured signal strength.

[0309] The frequency of the above-mentioned subnet B is a specified frequency that can be searched by the terminal. Here, in the case where the terminal determines that the resident subnet needs to be replaced, the UE measures the signal strength of the specified frequency, and determines whether subnet B meets the resident condition according to the signal threshold related information and the S criterion of cell selection or the R criterion of cell reselection.

[0310] Step 6: When subnet B meets the resident condition, the subnet identification information broadcast by subnet B is received.

[0311] Step 7: If the subnet identifier of the subnet B is consistent with the identifier of the target subnet indicated by the subnet A, perform the subsequent camping operation in the subnet B;

[0312] Step 8: The UE performs a re-registration process through the subnet B.

[0313] This step 8 is an optional step.

[0314] In this embodiment, the subnet A informs the terminal to change the camping subnet through an RRC message, and the terminal determines whether the subnet B meets the camping condition based on the RRC message in the case that the terminal needs to change the camping subnet; in the case that the subnet B meets the camping condition, the camping operation in the subnet B is performed. Thus, the purpose of changing the camping subnet of the terminal is achieved, so that the number of terminals camping in different subnets can be adjusted, and the purpose of adjusting the paging or access load of different subnets is achieved, effectively ensuring that the energy efficiency of the entire operation network reaches the best.

[0315] Embodiment three: assuming that the first subnet in which the terminal currently camps is the subnet A (also described as the subnet A), and the terminal autonomously decides to change the camping subnet according to the preconfigured information (such as the preconfigured subnet change condition), as shown in FIG. 7, the process includes:

[0316] Step 0: The UE obtains the preconfigured information through the subnet A or the operator, and the preconfigured information includes the subnet change condition.

[0317] The preconfigured subnet change condition can be a terminal with a specific feature or a terminal with a specific capability, such as a terminal with high or low speed, a terminal with a certain active degree, or a terminal supporting a non-terrestrial network (NTN).

[0318] In some embodiments, the preconfigured information further includes at least one of the following:

[0319] an identifier of at least one target subnet;

[0320] frequency information corresponding to the at least one target subnet;

[0321] a signal strength threshold value corresponding to the at least one target subnet;

[0322] priority information of the at least one target subnet.

[0323] Step 1: The UE determines whether the camping subnet needs to be changed according to the preconfigured information.

[0324] For example, according to the mobile speed threshold, the activity level, etc. in the preconfigured information, it is determined whether the resident subnet needs to be changed.

[0325] Step 2: In the case where the terminal determines that the resident subnet needs to be changed, the signal strength of the subnet B (the second subnet) is measured, and it is determined whether the subnet B meets the resident condition based on the measured signal strength.

[0326] The frequency of the above-mentioned subnet B is a specified frequency that can be searched by the terminal. Here, in the case where the terminal determines that the resident subnet needs to be changed, the UE measures the signal strength of the specified frequency, and determines whether the subnet B meets the resident condition according to the signal threshold related information and the S criterion of cell selection or the R criterion in cell reselection.

[0327] Step 3: When the subnet B meets the resident condition, the subnet identification information broadcast by the subnet B is received.

[0328] Step 4: If the subnet identification of the subnet B is consistent with the identification of the target subnet indicated by the subnet A, the subsequent resident operation in the subnet B is performed.

[0329] Step 5: The UE performs the re-registration process through the subnet B.

[0330] This step 5 is an optional step.

[0331] In this embodiment, the terminal determines whether the resident subnet needs to be changed based on the preconfigured information, and determines whether the subnet B meets the resident condition in the case where it is determined that the resident subnet needs to be changed. In the case where the subnet B meets the resident condition, the resident operation in the subnet B is performed. Thus, the purpose of changing the resident subnet of the terminal is achieved, so that the number of terminals residing in different subnets can be adjusted, and the purpose of adjusting the paging or access load of different subnets is achieved, and the energy efficiency of the entire operation network is effectively guaranteed to be optimal.

[0332] Embodiment four: interaction between the core network and the subnet;

[0333] As shown in FIG. 8, the process includes:

[0334] Step 1: The AMF determines whether to trigger the resident subnet changing operation of some terminals according to the user information in each subnet registration area in the control range.

[0335] Specifically, the AMF determines whether to trigger the resident subnet changing operation of some terminals according to the relationship between the number of users in each subnet registration area in the control range and the preset number. In the case where the number of users in the subnet registration area is greater than or equal to the preset number, the resident subnet changing operation of some terminals in the subnet registration area is triggered.

[0336] Step 2: In a case where it is determined to trigger the terminal to change the resident subnet operation, the AMF sends a resident subnet change request message to the RNF of the subnet A (i.e., the first subnet) where the terminal resides through a service interface.

[0337] The resident subnet change request message includes at least one of the following:

[0338] An identity of the terminal that needs to change the resident subnet.

[0339] An identity of at least one target subnet, which is a subnet for the terminal to change;

[0340] Frequency information corresponding to the at least one target subnet;

[0341] A signal strength threshold value corresponding to the at least one target subnet;

[0342] Priority information of the at least one target subnet;

[0343] A change factor;

[0344] A subnet change condition.

[0345] Step 3: The RNF of the subnet A informs the terminal to change the resident subnet.

[0346] Specifically, the RNF of the subnet A can inform the terminal to change the resident subnet through a system message or an RRC message.

[0347] Here, after informing the terminal to change the resident subnet, the terminal performs the corresponding operation in Embodiment I or Embodiment II.

[0348] Step 4: The RNF of the subnet A feeds back a resident subnet change response message to the AMF through a service interface.

[0349] In this embodiment, the AMF triggers the terminal to change the resident subnet operation, and the AMF informs the RNF of the corresponding subnet, and the RNF of the corresponding subnet further informs the terminal to change the resident subnet operation, thereby achieving the purpose of changing the subnet where the terminal resides, so as to adjust the number of terminals residing in different subnets, and further achieve the purpose of adjusting the paging or access load of different subnets, and effectively ensure that the energy efficiency of the entire operation network reaches the best.

[0350] As shown in FIG. 9, the present disclosure provides a terminal resident device, applied to a terminal, comprising a memory 920, a transceiver 900, and a processor 910.

[0351] The memory 920 is configured to store a computer program; the transceiver 900 is configured to transceive data under the control of the processor 910; and the processor 910 is configured to read the computer program in the memory 920 and perform the following operations:

[0352] In a case that a pre-configured subnetwork replacement condition is met or a first message sent by a first subnetwork in the communication network is received, it is determined that a replacement of a resident subnetwork is needed, wherein the first subnetwork is a subnetwork in which the terminal has camped, and the terminal is in an idle state;

[0353] It is determined whether a second subnetwork meets a camping condition, the second subnetwork being a subnetwork in the communication network that can be detected or searched by the terminal, and the second subnetwork being different from the first subnetwork;

[0354] In a case that the second subnetwork meets the camping condition, a camping operation in the second subnetwork is performed.

[0355] In FIG. 9, the bus architecture can include any number of interconnected buses and bridges, which link together various circuits, including one or more processors, represented by processor 910, and memory, represented by memory 920. The bus architecture can also link together various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus, not further described herein. Bus interface provides an interface. Transceiver 900 can be a plurality of elements, including a transmitter and a receiver, which provide a means for communicating with various other apparatuses over a transmission medium, including wireless channels, wired channels, optical cables, and the like. User interface 930 can also be an interface that can be external or internal to the device, connecting devices including, but not limited to, a keypad, a display, a speaker, a microphone, a joystick, and the like, for different user equipment.

[0356] Processor 910 is responsible for managing the bus architecture and general processing, and memory 920 can store data used by processor 910 in executing operations.

[0357] In some embodiments, processor 910 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), and the processor can also adopt a multi-core architecture.

[0358] The processor is configured to execute any of the methods provided by the embodiments of the present disclosure by invoking computer program stored in the memory. The processor and the memory can also be physically arranged separately.

[0359] In some embodiments, the processor further implements the following steps:

[0360] determining whether the second subnetwork satisfies the camping condition according to the relationship between the signal strength of the second subnetwork and the signal strength threshold value and the cell selection or reselection criterion.

[0361] In some embodiments, the processor further implements the following steps:

[0362] performing the camping operation in the second subnetwork in the case that the second subnetwork satisfies the camping condition and the identity of the second subnetwork is the same as the identity of the target subnetwork;

[0363] wherein the target subnetwork is the subnetwork indicated by the first subnetwork for the terminal to replace.

[0364] In some embodiments, the identity of the second subnetwork or the identity of the target subnetwork is indicated by at least one of the following:

[0365] the M1th bit in the first identity indication information configured by the network side, the first identity indication information including N1 bits, the N1 bits being used to indicate the wireless access node identity, M1≤N1, and M1 and N1 are both positive integers;

[0366] the M2th bit in the second identity indication information configured by the network side, the second identity indication information including N2 bits, the N2 bits being used to indicate the global cell identity, M2≤N2, and M2 and N2 are both positive integers;

[0367] the M3th bit in the third identity indication information configured by the network side, the third identity indication information including N3 bits, the N3 bits being used to indicate the tracking area identity, M3≤N3, and M3 and N3 are both positive integers.

[0368] In some embodiments, the first message includes at least one of the following:

[0369] the identity of at least one target subnetwork;

[0370] the frequency information corresponding to at least one target subnetwork;

[0371] the signal strength threshold value corresponding to at least one target subnetwork;

[0372] the priority information of at least one target subnetwork;

[0373] the replacement factor;

[0374] the subnetwork replacement condition.

[0375] In some embodiments, when the first message comprises at least one of the replacement factor and the subnet replacement condition;

[0376] The processor further implements the following steps:

[0377] Upon receiving the first message sent by the first subnet and the subnet replacement condition being satisfied, it is determined that the residing subnet needs to be replaced.

[0378] And / or, upon receiving the first message sent by the first subnet and the random number generated by the terminal and the replacement factor satisfying a preset relationship, it is determined that the residing subnet needs to be replaced.

[0379] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0380] In some embodiments, the processor further implements the following steps:

[0381] Initiating a residing registration procedure to the second subnet.

[0382] It should be noted that the above device provided by the embodiments of the present disclosure can implement all the method steps achieved by the terminal residing method embodiments applied to the terminal, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0383] As shown in FIG. 10, the embodiments of the present disclosure further provide a terminal residing device, which comprises a memory 1020, a transceiver 1000, and a processor 1010.

[0384] The memory 1020 is configured to store a computer program; the transceiver 1000 is configured to transceive data under the control of the processor; and the processor 1010 is configured to read the computer program in the memory and perform the following operations:

[0385] sending a preconfigured subnet replacement condition or a first message to a terminal, the first message being used to inform the terminal to replace a residing subnet, wherein the first subnet is a subnet in which the terminal has resided, and the terminal is in an idle state; wherein the replaced residing subnet is a second subnet, the second subnet being a subnet that the terminal can detect or search in the communication network and satisfying a residing condition, and the second subnet being different from the first subnet.

[0386] In FIG. 10, the bus architecture can include any number of interconnected buses and bridges, which link various circuits, including the one or more processors represented by the processor 1010 and the memory represented by the memory 1020. The bus architecture can also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and thus, not further described herein. The bus interface provides an interface. The transceiver 1000 can be a plurality of elements, i.e., including a transmitter and a receiver, which provide a means for communicating with various other apparatuses over a transmission medium, including wireless channels, wired channels, optical cables, and the like. The processor 1010 is responsible for managing the bus architecture and general processing, and the memory 1020 can store data used by the processor 1010 in executing operations.

[0387] The processor 1010 can be a central processing unit (CPU), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD), or the processor can also take a multi-core architecture.

[0388] In some embodiments, the first message comprises at least one of:

[0389] an identity of at least one target subnet, the target subnet being a subnet indicated by the first subnet for terminal replacement;

[0390] frequency information corresponding to the at least one target subnet;

[0391] a signal strength threshold value corresponding to the at least one target subnet;

[0392] priority information of the at least one target subnet;

[0393] a replacement factor;

[0394] a subnet replacement condition.

[0395] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0396] In some embodiments, the processor further implements the following steps:

[0397] obtaining a replacement resident subnet request message sent by a core network device;

[0398] sending the first message to a terminal according to the replacement resident subnet request message.

[0399] In some embodiments, the change-resident-subnet request message comprises at least one of:

[0400] an identity of the terminal requiring a change of the resident subnet;

[0401] an identity of at least one target subnet, the target subnet being a subnet for the terminal to change;

[0402] frequency information corresponding to the at least one target subnet;

[0403] a signal strength threshold value corresponding to the at least one target subnet;

[0404] priority information of the at least one target subnet;

[0405] a change factor;

[0406] a subnet change condition.

[0407] It is to be noted that the above apparatus provided by the embodiments of the present disclosure can realize all the method steps achieved by the terminal-resident method applied to the network device embodiments and achieve the same technical effects, and thus the same parts and beneficial effects of the method embodiments will not be described in detail herein.

[0408] As shown in FIG. 11, the embodiments of the present disclosure further provide a terminal-resident apparatus, comprising:

[0409] a first determination unit 1101 configured to determine that a resident subnet needs to be changed in a case where a preconfigured subnet change condition is met or a first message sent by a first subnet in a communication network is received, wherein the first subnet is a subnet in which the terminal has resided, and the terminal is in an idle state;

[0410] a second determination unit 1102 configured to determine whether a second subnet meets a resident condition, the second subnet being a subnet that the terminal can detect or search in the communication network, and the second subnet being different from the first subnet;

[0411] an execution unit 1103 configured to perform a resident operation in the second subnet in a case where the second subnet meets the resident condition.

[0412] In some embodiments, the second determination unit is configured to determine whether the second subnet meets the resident condition according to a relationship between a signal strength of the second subnet and a signal strength threshold value and a cell selection or reselection criterion.

[0413] In some embodiments, the execution unit is configured to perform a camping operation in the second subnet if the second subnet satisfies a camping condition and an identity of the second subnet is the same as an identity of a target subnet.

[0414] The target subnet is indicated by the first subnet for a terminal to replace.

[0415] In some embodiments, the identity of the second subnet or the identity of the target subnet is indicated by at least one of the following:

[0416] An M1th bit in first identity indication information configured by a network side, the first identity indication information including N1 bits, the N1 bits being used to indicate a radio access node identity, M1≤N1, and M1 and N1 are positive integers.

[0417] An M2th bit in second identity indication information configured by the network side, the second identity indication information including N2 bits, the N2 bits being used to indicate a global cell identity, M2≤N2, and M2 and N2 are positive integers.

[0418] An M3th bit in third identity indication information configured by the network side, the third identity indication information including N3 bits, the N3 bits being used to indicate a tracking area identity, M3≤N3, and M3 and N3 are positive integers.

[0419] In some embodiments, the first message includes at least one of the following:

[0420] An identity of at least one target subnet;

[0421] Frequency information corresponding to at least one target subnet;

[0422] A signal strength threshold value corresponding to at least one target subnet;

[0423] Priority information of at least one target subnet;

[0424] A replacement factor;

[0425] A subnet replacement condition.

[0426] In some embodiments, when the first message includes at least one of the replacement factor and the subnet replacement condition;

[0427] The first determination unit is configured to:

[0428] determine that a camping subnet needs to be replaced if the first message sent by the first subnet is received and the subnet replacement condition is satisfied;

[0429] And / or, in a case where the first message sent by the first subnetwork is received, and the random number generated by the terminal and the replacement factor satisfy a preset relationship, it is determined that the resident subnetwork needs to be replaced.

[0430] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0431] In some embodiments, the apparatus provided by the embodiments of the present disclosure further comprises:

[0432] The registration unit is configured to initiate a resident registration process to the second subnetwork.

[0433] It should be noted that the apparatus provided by the embodiments of the present disclosure can realize all the method steps realized by the terminal resident method for a terminal provided by the embodiments of the present disclosure, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0434] As shown in FIG. 12, the embodiments of the present disclosure further provide a terminal resident apparatus, comprising:

[0435] The sending unit 1201 is configured to send a preconfigured subnetwork replacement condition or a first message to a terminal, the first message being used to inform the terminal to replace a resident subnetwork, wherein the first subnetwork is a subnetwork in which the terminal has resided, and the terminal is in an idle state. The replaced resident subnetwork is a second subnetwork, the second subnetwork being a subnetwork that can be detected or searched by the terminal in the communication network and satisfying a resident condition, and the second subnetwork is different from the first subnetwork.

[0436] In some embodiments, the first message comprises at least one of the following:

[0437] An identifier of at least one target subnetwork, the target subnetwork being a subnetwork indicated by the first subnetwork for the terminal to replace;

[0438] Frequency information corresponding to the at least one target subnetwork;

[0439] A signal strength threshold value corresponding to the at least one target subnetwork;

[0440] Priority information of the at least one target subnetwork;

[0441] A replacement factor;

[0442] A subnetwork replacement condition.

[0443] In some embodiments, the first message comprises a system message or a radio resource control (RRC) message.

[0444] In some embodiments, the sending unit comprises:

[0445] The acquisition subunit is configured to acquire a change-resident-subnet request message sent by the core network device.

[0446] The sending subunit is configured to send the first message to the terminal according to the change-resident-subnet request message.

[0447] In some embodiments, the change-resident-subnet request message comprises at least one of the following:

[0448] An identifier of the terminal that needs to change the resident subnet;

[0449] An identifier of at least one target subnet, the target subnet being a subnet for the terminal to change;

[0450] Frequency information corresponding to the at least one target subnet;

[0451] A signal strength threshold value corresponding to the at least one target subnet;

[0452] Priority information of the at least one target subnet;

[0453] A change factor;

[0454] A subnet change condition.

[0455] It should be noted that the above apparatus provided by the embodiments of the present disclosure can realize all the method steps realized by the terminal-resident method applied to the network device embodiments, and achieve the same technical effects. Therefore, the same parts and beneficial effects of the method embodiments will not be described in detail.

[0456] It should be noted that the division of units in the embodiments of the present disclosure is illustrative, and is only a logical function division. In actual implementation, another division mode can be used. In addition, each functional unit in each embodiment of the present disclosure can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0457] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a processor-readable storage medium. Based on such understanding, the technical solutions of the present disclosure, essentially or in other words, the part that contributes to the related art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (processor) to perform all or part of the steps of the methods described in the various embodiments of the present disclosure. The aforementioned storage medium includes various media that can store program codes, such as a U disk, a mobile hard disk, a read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk, or an optical disk.

[0458] In some embodiments of the present disclosure, a processor-readable storage medium is also provided, which stores program instructions for causing the processor to perform all steps implemented by the method embodiments performed by the terminal or all steps implemented by the method embodiments performed by the network device, and the same technical effects can be achieved. Here, the same parts and beneficial effects of the method embodiments in this embodiment will not be described in detail.

[0459] The embodiments of the present disclosure also provide a computer program product, which includes computer instructions that, when executed by a processor, implement each process of the above-mentioned terminal camping method embodiments and achieve the same technical effects. To avoid repetition, these will not be described here.

[0460] The terminal device to which the embodiments of the present disclosure relate can refer to a device that provides voice and / or data connectivity to a user, a handheld device with a wireless connection function, or other processing devices connected to a wireless modem, etc. In different systems, the name of the terminal device can also be different, for example, in the 5G system, the terminal device can be called a user equipment (UE). The wireless terminal device can communicate with one or more core networks (CN) through a radio access network (RAN). The wireless terminal device can be a mobile terminal device, such as a mobile phone (or called a "cellular" phone) and a computer with a mobile terminal device, for example, it can be a portable, pocket, handheld, computer built-in or vehicle-mounted mobile device, which exchanges language and / or data with the radio access network. For example, personal communication service (PCS) phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), etc. The wireless terminal device can also be called a system, a subscriber unit, a subscriber station, a mobile station, a mobile, a remote station, an access point, a remote terminal, an access terminal, a user terminal, a user agent, a user device, which is not limited in the embodiments of the present disclosure.

[0461] The network device (or network side device) involved in the embodiments of the present disclosure can be a base station, which can include multiple cells serving terminals. According to different application scenarios, the base station can also be referred to as an access point, or can be a device in an access network that communicates with wireless terminal devices through one or more sectors over an air interface, or other names. The network device can be used to exchange received air frames and Internet Protocol (IP) packets as a router between the wireless terminal device and the rest of the access network, which can include an Internet Protocol (IP) communication network. The network device can also coordinate the management of the properties of the air interface. For example, the network device involved in the embodiments of the present disclosure can be a network device (Base Transceiver Station, BTS) in the Global System for Mobile Communications (GSM) or Code Division Multiple Access (CDMA), and can also be a network device (NodeB) in Wide-band Code Division Multiple Access (WCDMA), and can also be an evolutional network device (evolutional Node B, eNB or e-NodeB) in a Long Term Evolution (LTE) system, a 5G base station (gNB) in a next generation system, and can also be a Home evolved Node B (HeNB), a relay node, a femto, a pico, etc., which are not limited in the embodiments of the present disclosure. In some network structures, the network device can include a Centralized Unit (CU) node and a Distributed Unit (DU) node, and the centralized unit and the distributed unit can also be arranged geographically apart.

[0462] The network device and the terminal device can each use one or more antennas for multi-input multi-output (MIMO) transmission, which can be single-user MIMO (SU-MIMO) or multiple-user MIMO (MU-MIMO). According to the form and number of root antenna combinations, the MIMO transmission can be two-dimensional MIMO (2D-MIMO), three-dimensional MIMO (3D-MIMO), full-dimensional MIMO (FD-MIMO), or massive-MIMO, and can also be diversity transmission or precoding transmission or beamforming transmission, etc.

[0463] Those skilled in the art will understand that the embodiments of the present disclosure can be provided as a method, a system, or a computer program product. Therefore, the present disclosure can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present disclosure can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage, etc.) containing computer-usable program code.

[0464] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present disclosure. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer executable instructions. These computer executable instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing apparatus to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing apparatus produce a means for implementing the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0465] These processor executable instructions can also be stored in a processor readable memory that can direct the computer or other programmable data processing apparatus to work in a specific manner, so that the instructions stored in the processor readable memory produce a product including instruction means, which implements the functions specified in one or more flows of the flowcharts and / or one or more blocks of the block diagrams.

[0466] These processor-executable instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operational steps are performed on the computer or other programmable device to generate a computer-implemented process such that the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more flows in the flowchart and / or one or more blocks in the block diagram.

[0467] In addition, it should be noted that in the apparatus and method of the present disclosure, it is obvious that each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be considered as equivalent solutions of the present disclosure. Moreover, the steps of performing the above series of processes can naturally be executed in time sequence according to the order of description, but do not necessarily have to be executed in time sequence, and certain steps can be executed in parallel or independently of each other. It can be understood by those skilled in the art that all or any steps or components of the method and apparatus of the present disclosure can be implemented in hardware, firmware, software or a combination thereof in any computing device (including processors, storage media, etc.) or network of computing devices, which can be implemented by those skilled in the art using their basic programming skills after reading the description of the present disclosure.

[0468] It should be noted that it should be understood that the division of each module above is only a logical division of functions, and in actual implementation, it can be integrated into a physical entity in whole or in part, or physically separated. And these modules can all be implemented in the form of software called by a processing element; they can all be implemented in the form of hardware; or some modules can be implemented in the form of software called by a processing element, and some modules can be implemented in the form of hardware. For example, a certain module can be a separately established processing element, or it can be implemented in a certain chip of the above device, and in addition, it can be stored in the form of program code in the memory of the above device, and called and executed by a certain processing element of the above device to determine the function of the above module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or independently implemented. The processing element described herein can be an integrated circuit with signal processing capability. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit of hardware or the instruction of software in the processing element.

[0469] For example, each module, unit, subunit, or submodule can be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs). As another example, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together to implement a system-on-a-chip (SOC).

[0470] The terms “first,” “second,” etc., used in this disclosure and in the claims are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this disclosure described herein may be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus. Additionally, the use of “and / or” in the specification and claims indicates at least one of the connected objects, such as A and / or B and / or C, indicating seven possibilities: A alone, B alone, C alone, and both A and B, both B and C, both A and C, and A, B, and C. Similarly, the use of “at least one of A and B” in this specification and claims should be understood as “A alone, B alone, or both A and B.”

[0471] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A terminal camping method, performed by a terminal, the method comprising: determining that a camping subnet needs to be changed, in a case that a preconfigured subnet changing condition is met or a first message sent by a first subnet in a communication network is received, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; performing a camping operation in a second subnet, in a case that the second subnet meets a camping condition, wherein the second subnet is a subnet that the terminal can detect or search in the communication network, and the second subnet is different from the first subnet. The performing the camping operation in the second subnet, in the case that the second subnet meets the camping condition, further comprises: determining whether the second subnet meets the camping condition according to a relationship between a signal strength of the second subnet and a signal strength threshold value and a cell selection or reselection criterion. The performing the camping operation in the second subnet, in the case that the second subnet meets the camping condition, comprises: performing the camping operation in the second subnet, in a case that the second subnet meets the camping condition and an identity of the second subnet is same as an identity of a target subnet; wherein the target subnet is a subnet indicated by the first subnet for the terminal to change to.

2. The method of claim 1, wherein, The identity of the second subnet or the identity of the target subnet is indicated by at least one of: an M1th bit in first identity indication information configured by a network side, wherein the first identity indication information comprises N1 bits, the N1 bits are used to indicate a radio access node identity, M1≤N1, and M1 and N1 are both positive integers; an M2th bit in second identity indication information configured by the network side, wherein the second identity indication information comprises N2 bits, the N2 bits are used to indicate a global cell identity, M2≤N2, and M2 and N2 are both positive integers; or an M3th bit in third identity indication information configured by the network side, wherein the third identity indication information comprises N3 bits, the N3 bits are used to indicate a tracking area identity, M3≤N3, and M3 and N3 are both positive integers. The first message comprises at least one of: an identity of at least one target subnet; frequency information corresponding to at least one target subnet; a signal strength threshold value corresponding to at least one target subnet; priority information of at least one target subnet; a change factor; or a subnet changing condition.

3. The method of claim 1, wherein, When the first message comprises at least one of the change factor and the subnet changing condition. The determining that the camping subnet needs to be changed, in the case that the first message sent by the first subnet in the communication network is received, comprises: determining that the camping subnet needs to be changed, in a case that the first message sent by the first subnet is received and the subnet changing condition is met; and / or determining that the camping subnet needs to be changed, in a case that the first message sent by the first subnet is received and a random number generated by the terminal and the change factor satisfy a preset relationship. The first message comprises a system message or a radio resource control (RRC) message.

4. The method of claim 3, wherein, 8.The method of claim 1, further comprising: initiating a camping registration procedure to the second subnet. ​ ​ ​ 5. The method of claim 3, wherein, ​ ​ ​ ​ ​ ​ ​ 6. The method of claim 5, wherein, ​ ​ ​ ​ 7. The method of claim 1, wherein, ​ ​ ​ 9.A terminal camping method, performed by a network device of a first subnet, the method comprising: sending, to a terminal, a pre-configured subnet change condition or a first message for notifying the terminal to change a camping subnet, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; and wherein the changed camping subnet is a second subnet, the second subnet is a subnet in which the terminal can detect or search in the communication network and meets a camping condition, and the second subnet is different from the first subnet.

10. The method of claim 9, wherein, The first message comprises at least one of: an identity of at least one target subnet, the target subnet being a subnet indicated by the first subnet for the terminal to change; frequency information corresponding to the at least one target subnet; a signal strength threshold value corresponding to the at least one target subnet; priority information of the at least one target subnet; a change factor; and a subnet change condition.

11. The method of claim 9, wherein, The first message comprises a system message or a radio resource control (RRC) message.

12. The method of claim 9, wherein, The sending of the first message to the terminal comprises: obtaining a change camping subnet request message sent by a core network device; and sending the first message to the terminal according to the change camping subnet request message.

13. The method of claim 12, wherein, The change camping subnet request message comprises at least one of: an identity of the terminal that needs to change the camping subnet; an identity of at least one target subnet, the target subnet being a subnet for the terminal to change; frequency information corresponding to the at least one target subnet; a signal strength threshold value corresponding to the at least one target subnet; priority information of the at least one target subnet; a change factor; and a subnet change condition. 14.A terminal camping apparatus, comprising a memory, a transceiver, and a processor; the memory is configured to store a computer program; the transceiver is configured to transceive data under control of the processor; the processor is configured to read the computer program in the memory and perform the following operations: determining that a camping subnet needs to be changed in a case where a pre-configured subnet change condition is met or a first message sent by a first subnet in a communication network is received, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; and performing a camping operation in a second subnet in a case where the second subnet meets a camping condition, the second subnet being a subnet in which the terminal can detect or search in the communication network, and the second subnet being different from the first subnet. 15.The apparatus of claim 14, wherein the processor is further configured to: determine whether the second subnet meets the camping condition according to a relationship between a signal strength of the second subnet and a signal strength threshold value and a cell selection or reselection criterion. 16.The apparatus of claim 14, wherein the processor is further configured to: wherein, perform the camping operation in the second subnet in a case where the second subnet meets the camping condition and an identity of the second subnet is same as an identity of a target subnet, the target subnet being a subnet indicated by the first subnet for the terminal to change.

17. The apparatus of claim 16, wherein, The identity of the second subnet or the identity of the target subnet is indicated by at least one of: an M1th bit in first identity indication information configured by the network side, the first identity indication information including N1 bits, the N1 bits being used for indicating a radio access node identity, M1≤N1, and M1 and N1 are positive integers; an M2th bit in second identity indication information configured by the network side, the second identity indication information including N2 bits, the N2 bits being used for indicating a global cell identity, M2≤N2, and M2 and N2 are positive integers; an M3th bit in third identity indication information configured by the network side, the third identity indication information including N3 bits, the N3 bits being used for indicating a tracking area identity, M3≤N3, and M3 and N3 are positive integers.

18. The apparatus of claim 16, wherein, The first message includes at least one of the following: an identity of at least one target subnet; frequency information corresponding to the at least one target subnet; a signal strength threshold value corresponding to the at least one target subnet; priority information of the at least one target subnet; a replacement factor; a subnet replacement condition.

19. The apparatus of claim 18, wherein, When the first message includes at least one of the replacement factor and the subnet replacement condition; The processor further implements the following steps: determining that the resident subnet needs to be replaced when the first message sent by the first subnet is received and the subnet replacement condition is met; and / or determining that the resident subnet needs to be replaced when the first message sent by the first subnet is received and a random number generated by the terminal and the replacement factor satisfy a preset relationship.

20. The apparatus of claim 14, wherein, The first message includes a system message or a radio resource control (RRC) message.

21. The apparatus of claim 14, wherein, The processor further implements the following steps: initiating a resident registration process to the second subnet.

22. A terminal resident device, comprising a memory, a transceiver, and a processor; The memory is configured to store a computer program. The transceiver is configured to transceive data under the control of the processor. The processor is configured to read the computer program in the memory and perform the following operations: sending a preconfigured subnet replacement condition or a first message to a terminal, the first message being used to inform the terminal to replace a resident subnet, wherein the first subnet is a subnet in which the terminal has resided, and the terminal is in an idle state; wherein the replaced resident subnet is a second subnet, the second subnet being a subnet that the terminal can detect or search in the communication network and meeting a resident condition, and the second subnet being different from the first subnet.

23. The apparatus of claim 22, wherein, The first message includes at least one of the following: an identity of at least one target subnet, the target subnet being a subnet indicated by the first subnet for the terminal to replace; frequency information corresponding to the at least one target subnet; a signal strength threshold value corresponding to the at least one target subnet; priority information of the at least one target subnet; a replacement factor; a subnet replacement condition.

24. The apparatus of claim 22, wherein, The first message includes a system message or a radio resource control (RRC) message.

25. The apparatus of claim 22, wherein, The processor further implements the following steps: obtaining a replacement resident subnet request message sent by a core network device; sending the first message to a terminal according to the replacement resident subnet request message.

26. The apparatus of claim 25, wherein, The replacement resident subnet request message includes at least one of the following: an identity of a terminal that needs to replace a resident subnet; an identifier of at least one target subnet, the target subnet being a subnet for terminal replacement; frequency information corresponding to the at least one target subnet; a signal strength threshold corresponding to the at least one target subnet; priority information of the at least one target subnet; a replacement factor; a subnet replacement condition. 27.A terminal camping apparatus, comprising: a first determining unit configured to determine that a camping subnet needs to be replaced in a case that a preconfigured subnet replacement condition is met or a first message sent by a first subnet in a communication network is received, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; an executing unit configured to perform a camping operation on a second subnet in a case that the second subnet meets a camping condition, the second subnet being a subnet that the terminal can detect or search in the communication network, and the second subnet being different from the first subnet. 28.A terminal camping apparatus, comprising: a sending unit configured to send a preconfigured subnet replacement condition or a first message to a terminal, the first message being used to inform the terminal to replace a camping subnet, wherein the first subnet is a subnet in which the terminal has camped, and the terminal is in an idle state; wherein the replaced camping subnet is a second subnet, the second subnet being a subnet that the terminal can detect or search in the communication network, and meeting a camping condition, the second subnet being different from the first subnet. 29.A processor readable storage medium, the processor readable storage medium storing a computer program, the computer program being used to cause the processor to perform steps of the terminal camping method according to any one of claims 1 to 8, or perform steps of the terminal camping method according to any one of claims 9 to 13. 30.A computer program product, comprising computer instructions, the computer instructions being executed by a processor to implement steps of the terminal camping method according to any one of claims 1 to 8, or perform steps of the terminal camping method according to any one of claims 9 to 13.

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