Cell Selection Method, Apparatus, Terminal and Storage Medium

Abstract

The present application discloses a cell selection method, apparatus, terminal and storage medium, belonging to the field of wireless communication technologies. The method includes: the terminal obtains first information; the first information is used to indicate that a second cell does not support a first demand slice; according to the first information, the terminal performs cell selection or reselection. Through the above solution, when the terminal performs cell selection or cell reselection, the slice information supported by the cell is considered, ensuring that the terminal can normally perform cell selection when the second cell does not support the slice, and avoiding loss of coverage.

Description

Technical Field

[0001] This application relates to the field of wireless communication technologies, and particularly relates to a cell selection method, apparatus, terminal, and storage medium. Background Art

[0002] In the fifth-generation (5G) mobile communication network, network slicing is introduced to reduce latency, enhance mobility, reliability, and precision.

[0003] Network slicing isolates some core network elements and allocates them to different network slices. That is, the network elements for specific service transmission in the core network are allocated to each network slice, and different network slices share the AMF (Access and Mobility Management Function). Based on network slicing, lower latency, more targeted, greater flexibility, and higher scalability services are provided for multiple services with different requirements. Summary of the Invention

[0004] Embodiments of this application provide a cell selection method, apparatus, terminal, and storage medium. The technical solutions are as follows:

[0005] On the one hand, embodiments of this application provide a cell selection method for a terminal. The method includes:

[0006] The terminal obtains first information, where the first information is used to indicate that a second cell does not support a first required slice, and the second cell is different from the first cell;

[0007] According to the first information, the terminal performs cell selection or reselection.

[0008] On the other hand, embodiments of this application provide a cell selection apparatus for a terminal. The apparatus includes:

[0009] A first information receiving module, configured to obtain first information, where the first information is used to indicate that a second cell does not support a first required slice, and the second cell is different from the first cell;

[0010] A cell selection module, configured to perform cell selection or reselection on the terminal according to the first information.

[0011] On the other hand, embodiments of this application provide a terminal, which includes a processor, a memory, and a transceiver. The memory stores a computer program, and the computer program is configured to be executed by the processor to implement the above cell selection method.

[0012] In another aspect, an embodiment of the present application further provides a computer-readable storage medium, in which a computer program is stored, and the computer program is loaded and executed by a processor to implement the above-mentioned cell selection method.

[0013] On the other hand, an embodiment of the present application further provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the terminal reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the terminal executes the above-mentioned cell selection method.

[0014] The technical solution provided by the embodiment of the present application can bring the following beneficial effects:

[0015] When the second cell does not support the first required slice, the terminal obtains first information for indicating that the second cell does not support the first required slice, and performs cell selection or reselection according to the first information. In the above solution, in the case where the second cell does not support the required slice, according to the first information for indicating that the second cell does not support the first required slice, the terminal performs cell selection or reselection, that is, when the terminal performs cell selection or cell reselection, the slice information supported by the cell is considered, which ensures that the terminal can normally perform cell selection when the second cell does not support the slice, and avoids losing coverage. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0017] Figure 1 It is a schematic diagram of the network architecture of a communication system provided by an embodiment of the present application;

[0018] Figure 2 It shows a flowchart of a cell selection method provided by an embodiment of the present application;

[0019] Figure 3 It shows a flowchart of a cell selection method provided by an embodiment of the present application;

[0020] Figure 4 It shows a schematic flowchart of a cell selection method provided by an exemplary embodiment of the present application;

[0021] Figure 5 It shows a schematic flowchart of a cell selection method provided by an exemplary embodiment of the present application;

[0022] Figure 6 It is a schematic flow chart of a cell selection method provided by an exemplary embodiment of the present application;

[0023] Figure 7 It shows a method flow chart of a cell selection method provided by an exemplary embodiment of the present application;

[0024] Figure 8 It shows a block diagram of a cell selection device provided by an embodiment of the present application;

[0025] Figure 9 It shows a schematic structural diagram of a computer device provided by an embodiment of the present application. Detailed implementation manners

[0026] To make the objectives, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in detail with reference to the accompanying drawings.

[0027] The network architecture and service scenarios described in the embodiments of the present application are to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided by the embodiments of the present application. Those of ordinary skill in the art can know that with the evolution of the network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0028] It should be understood that the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or a representation of an associated relationship. For example, A indicates B, which can mean that A directly indicates B. For example, B can be obtained through A; it can also mean that A indirectly indicates B. For example, A indicates C, and B can be obtained through C; it can also mean that there is an associated relationship between A and B.

[0029] In the description of the embodiments of the present application, the term "corresponding" can represent a direct or indirect corresponding relationship between two parties, can also represent an associated relationship between two parties, or can also be a relationship such as indication and being indicated, configuration and being configured, etc.

[0030] In the embodiments of the present application, "predefinition" can be implemented by pre-saving corresponding codes, tables or other means that can be used to indicate relevant information in devices (for example, including terminal devices and network devices). The present application does not limit its specific implementation manner. For example, predefinition can refer to that defined in the protocol.

[0031] Please refer to Figure 1 , which shows a schematic diagram of the network architecture of a communication system provided by an embodiment of the present application. The network architecture may include: a terminal 10, a base station 20, and a core network 30.

[0032] The number of terminals 10 is usually multiple, and one or more terminals 10 can be distributed within each cell managed by a base station 20. The terminal 10 can include various handheld devices, vehicle-mounted devices, wearable devices, computing devices, or other processing devices connected to a wireless modem, as well as various forms of user equipment (UE), mobile station (MS), terminal device, etc. For the convenience of description, in the embodiments of this application, the above-mentioned devices are collectively referred to as terminals.

[0033] The base station 20 is a device deployed in the access network to provide wireless communication functions for the terminal 20. The base station 20 can include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems adopting different radio access technologies, the names of the devices with base station functions may be different. For example, in the 5G New Radio (NR) system, it is called gNodeB or gNB. With the evolution of communication technologies, the name of the "base station" may change. For the convenience of description, in the embodiments of this application, the device that provides wireless communication functions for the terminal 20 is collectively referred to as the base station.

[0034] In the embodiments of this application, the base station 20 may include at least two base stations, and the at least two base stations are respectively used to cover the cells corresponding to the base stations themselves.

[0035] The core network (CN) 30 mainly provides user connections, user management, and service bearer, and provides an interface to the external network as a bearer network. The establishment of user connections includes functions such as mobility management, call management, switching / routing, and announcement (combining intelligent network services to complete the connection relationship to intelligent network peripheral devices).

[0036] Optionally, Figure 1 Not shown in the figure is that the above network architecture further includes other network devices, such as: Central Network Control (CNC), Session Management Function (SMF), or User Plane Function (UPF) devices, etc.

[0037] The "5G NR system" in the embodiments of this disclosure can also be referred to as the 5G system or the NR system, but those skilled in the art can understand its meaning. The technical solutions described in the embodiments of this disclosure can be applied to the 5G NR system and also to the subsequent evolved systems of the 5G NR system.

[0038] Please refer to Figure 2, which shows the flowchart of the cell selection method provided by an embodiment of the present application. This method can be executed by a terminal. Among them, the above terminal can be Figure 1 the terminal 10 in the network architecture shown. This method can include the following steps:

[0039] Step 201, the terminal obtains first information; the first information is used to indicate that the second cell does not support the required slice.

[0040] Step 202, according to the first information, the terminal performs cell selection or reselection.

[0041] In summary, in the solution shown in the embodiment of the present application, when the second cell does not support the first required slice, the terminal obtains the first information used to indicate that the second cell does not support the first required slice, and performs cell selection or reselection according to the first information. In the above solution, in the case where the second cell does not support the required slice, according to the first information used to indicate that the second cell does not support the first required slice, the terminal performs cell selection or reselection, that is, when the terminal performs cell selection or cell reselection, it considers the slice information supported by the cell, ensuring that the terminal can normally perform cell selection when the second cell does not support the slice, and avoiding loss of coverage.

[0042] Please refer to Figure 3 , which shows the flowchart of the cell selection method provided by an embodiment of the present application. This method can be executed by the terminal, the base station, and the access and mobility management function AMF in the core network CN. This method can include the following steps:

[0043] Step 301, the terminal obtains first information.

[0044] In a possible implementation, the first information includes at least one of system information, dedicated information, information subscribed by the terminal, or information stored by the terminal.

[0045] In a possible implementation, the terminal receives the first information sent by the second cell.

[0046] Among them, the first information is used to indicate that the second cell does not support the first required slice.

[0047] In a possible implementation, the first required slice is the required slice supported by the first cell.

[0048] In a possible implementation, the required slice supported by the first cell is the slice of the required information obtained by the terminal (such as obtained from the NAS of the terminal), or can also be the slice of the required information when the terminal camps on the first cell.

[0049] In a possible implementation manner, the first cell is a cell currently selected or camped on by the terminal, and the second cell is different from the first cell.

[0050] Step 302: Determine cell selection or reselection parameters according to the first information.

[0051] Among them, the cell selection or reselection parameters include but are not limited to at least one of the following: channel quality comparison threshold, cell access permission (Cell Bar Access, CBA), cell prohibition permission (Cell Bar Qualify, CBQ), control channel maximum power level (MS_TXPWR_MAX_CCH), minimum reception level allowed for access (RXLEV_ACCESS_MIN), cell reselection parameter indication, cell reselection offset, temporary offset, penalty time and cell reselection hysteresis (Cell Selection Hysteresis, CSH).

[0052] In a possible implementation manner, according to the first information, a first cell selection parameter is determined as the cell selection or reselection parameter; or, according to the first information, a second cell selection parameter is determined as the cell selection or reselection parameter.

[0053] That is, the terminal UE can obtain multiple sets of cell selection / reselection parameters, where the second set of cell selection or reselection parameters (i.e., the second cell selection parameters) is used to ensure that the UE stays in the current cell as much as possible to ensure the continuity of the slice when the intended slice (the required slice corresponding to the first cell) is supported in the current area but not in the neighboring area.

[0054] In one possible implementation, based on the first information, a first indication message is obtained; when the first indication information satisfies a first indication condition, a first cell selection or reselection parameter is determined as the cell selection or reselection parameter; when the first indication information satisfies a second indication condition, a second cell selection or reselection parameter is determined as the cell selection or reselection parameter.

[0055] The UE can obtain indication information. When the first indication information appears or is true (that is, the first indication condition is met), it means that the UE is allowed to select the second set of parameters, allowing the UE to stay in the current cell as much as possible to ensure the continuity of the slice; when the first indication information does not appear (that is, the second specified condition is met), it means that the UE selects the first set of parameters and adopts the pre-set cell selection or reselection parameters.

[0056] In a possible implementation, the second cell selection or reselection parameter is obtained by the terminal from the first cell; or, the second cell selection or reselection parameter is obtained by the terminal from the second cell; or, the second cell selection or reselection parameter is pre-stored or predefined by the terminal.

[0057] In a possible implementation, the first indication information is obtained by the terminal from the first cell; or, the first indication information is obtained by the terminal from the second cell; or, the first indication information is pre-stored or predefined by the terminal.

[0058] That is, the second cell selection or reselection parameter or the first indication information can be obtained by the UE from its own cell (system information) or a neighboring cell (system information), can also be previously stored in the terminal, or can be predefined in the protocol.

[0059] Step 303: According to the cell selection or reselection parameter, the terminal performs cell selection or reselection.

[0060] In a possible implementation, the terminal can adopt a second set of cell selection or reselection parameters to ensure that the UE stays in the first cell for a longer time, that is, selects the second cell to camp on as late as possible.

[0061] In a possible implementation, the second cell selection parameter includes a second threshold; the first cell selection parameter includes a first threshold. When the channel quality corresponding to the first cell by the terminal is not lower than the first threshold and not higher than the second threshold, the terminal camps on the first cell.

[0062] If based on the second set of cell selection / reselection parameters, the channel quality of the UE in its own cell is lower than the first threshold (existing parameters) but higher than the second threshold (the second set of parameters), the UE camps on the current cell and does not perform cell selection or reselection.

[0063] In a possible implementation, the second cell selection parameter further includes a third threshold; when the channel quality corresponding to the second cell by the terminal is not higher than the third threshold, the terminal camps on the first cell.

[0064] If based on the second set of cell selection / reselection parameters, the channel quality of the UE in a neighboring cell is not higher than the third threshold (the second set of parameters, and the third threshold is higher than the threshold of the existing parameters), the UE camps on the current cell and does not perform cell selection or reselection.

[0065] In a possible implementation, if the UE adopts the second cell selection or reselection parameter and the UE does not meet the above channel quality conditions, when the terminal performs cell selection or reselection, it can directly make a determination on the first cell and the second cell according to the second cell selection or reselection parameter.

[0066] In a possible implementation, the terminal performs a first operation; wherein, the first operation includes at least one of the following operations:

[0067] Replace the first required slice; perform restricted services or restricted transmission; perform normal services or normal transmission; camp on the second cell; perform cell selection or reselection operations; select or reselect to the second cell; consider the second cell as an acceptable cell; consider the second cell as a suitable cell; fallback to non-slice-based cell selection or reselection rules; ignore the slice-based cell selection or reselection rules; perform non-slice-based cell selection or reselection; perform slice-based cell selection or reselection; camp on the first cell.

[0068] When the terminal receives the first message and the first message indicates that the second cell does not indicate the first required slice, the terminal may take the corresponding first operation to ensure normal communication transmission between the terminal and the cell.

[0069] In a possible implementation, the access stratum of the terminal sends a first slice indication message to the non-access stratum; the first slice indication message is used to indicate that the second cell does not support the first required slice.

[0070] In a possible implementation, the access stratum of the terminal sends a second slice indication message to the non-access stratum; the second slice indication message is used to indicate the slice information supported by the second cell.

[0071] In a possible implementation of the embodiments of the present application, the non-access stratum may be the non-access stratum of the terminal, or the non-access stratum may be the non-access stratum of the network-side device.

[0072] In a possible implementation, slice information (i.e., slicing information) may be a slice identifier, or a slice group identifier, or parameters corresponding to the slice (such as access class, etc.).

[0073] When the access stratum of the terminal obtains the first message and the first message indicates that the second cell does not support the first required slice, it may send a first slice indication message to the non-access stratum to notify the non-access stratum that the second cell does not support the first required slice; or, when the access stratum of the terminal receives the first message and the first message indicates the slice information supported by the second cell, the access stratum of the terminal may send a second slice indication message to the non-access stratum to notify the non-access stratum of the slice message supported by the second cell.

[0074] In a possible implementation, the non-access stratum sends first feedback information for the slice requirement message to the terminal or the access stratum of the terminal; the slice requirement message includes at least one of the first slice indication message and the second slice indication message;

[0075] The terminal or the access stratum of the terminal performs one of the following operations according to the first feedback information for the slice requirement message:

[0076] Perform cell selection or reselection;

[0077] Determine the access behavior in the second cell;

[0078] Determine the execution steps of cell selection or reselection;

[0079] Or, camp on the first cell.

[0080] Among them, the determination of the access behavior in the second cell includes determining whether the terminal or the access stratum of the terminal camps on the second cell, determining whether the terminal or the access stratum of the terminal considers the second cell to be a suitable cell, etc.; the determination of the execution steps of cell selection or reselection is how the terminal determines to perform cell selection or reselection (such as whether to execute according to the existing rules, etc.).

[0081] When the non-access stratum receives the slice requirement message, it may send the first feedback information for the slice requirement message to the terminal or the access stratum of the terminal to instruct the terminal or the access stratum of the terminal to perform corresponding operations.

[0082] For example, when the non-access stratum receives the slice requirement message, it may, through the first feedback information, instruct the terminal to perform cell selection or reselection; or when the non-access stratum receives the slice requirement message, it may, through the first feedback information, instruct the access behavior of the terminal in the second cell (such as whether to camp, whether to consider it a suitable cell, etc.); or when the non-access stratum receives the slice requirement message, it may, through the first feedback information, instruct the terminal to camp on the first cell.

[0083] In a possible implementation, according to the first feedback information for the slice requirement message, the behaviors performed by the terminal or the access stratum of the terminal include at least one of the following:

[0084] Determine or perform restricted service or restricted transmission;

[0085] Determine or perform normal service or normal transmission;

[0086] Determine or camp on the second cell;

[0087] Determine or select or reselect to the second cell;

[0088] Determine or consider the second cell as an acceptable cell;

[0089] Determine or consider the second cell as a suitable cell;

[0090] Determine or perform cell selection or reselection operations;

[0091] Determine or perform non-slice-based cell selection or reselection rules.

[0092] In a possible implementation, the first feedback information for the slice requirement message includes or is used to indicate at least one of the following:

[0093] Requirement slice update indication; update the first requirement slice; perform restricted service or restricted transmission; perform normal service or normal transmission; camp on the second cell; perform cell selection or reselection; select or reselect to the second cell; consider the second cell as an acceptable cell; consider the second cell as a suitable cell; camp on the first cell.

[0094] When the terminal or the access stratum of the terminal receives the first feedback information for the slice requirement message, it may determine to perform a specified operation according to the first feedback information for the slice requirement message; or, when the first feedback information for the slice requirement message is used to indicate that the terminal or the access stratum of the terminal performs an operation corresponding to the feedback information, the terminal or the access stratum of the terminal performs the specified operation under the indication of the non-access stratum.

[0095] For example, when the first feedback information for the slice requirement message sent by the non-access stratum to the terminal or the non-access stratum of the terminal includes "consider the second cell as a suitable cell", the terminal or the access stratum of the terminal receives the information of "consider the second cell as a suitable cell", and the terminal or the access stratum of the terminal determines that the terminal or the access stratum of the terminal performs the operation of camping on the second cell; when the first feedback information for the slice requirement message sent by the non-access stratum to the terminal or the non-access stratum of the terminal includes the indication information of "camp on the second cell", the terminal or the access stratum of the terminal directly performs the operation of camping on the second cell according to the indication information.

[0096] In a possible implementation, the non-access stratum performs at least one of the following operations according to the slice requirement message:

[0097] Update the first requirement slice; determine the behavior of the access stratum of the terminal.

[0098] When the non-access stratum receives the slice requirement message, when the slice requirement message is used to indicate the slice information supported by the second cell, the slice can be updated according to the slice requirement message, and the behavior of the access stratum of the terminal can be determined. For example, the terminal can perform cell selection or reselection based on the updated slice.

[0099] When the non-access stratum receives the slice requirement message, when the slice requirement message indicates that the second cell does not support slice information, the non-access stratum can determine the behavior of the access stratum of the terminal.

[0100] In a possible implementation, the determining the behavior of the access stratum of the terminal includes at least one of the following:

[0101] Determine or indicate that the terminal or the access stratum of the terminal performs restricted services or restricted transmissions;

[0102] Determine or indicate that the terminal or the access stratum of the terminal performs normal services or normal transmissions;

[0103] Determine or indicate that the terminal or the access stratum of the terminal camps on the second cell;

[0104] Determine or indicate that the terminal or the access stratum of the terminal selects or reselects to the second cell;

[0105] Determine or indicate that the terminal or the access stratum of the terminal considers the second cell as an acceptable cell;

[0106] Determine or indicate that the terminal or the access stratum of the terminal considers the second cell as a suitable cell;

[0107] Determine or indicate that the terminal or the access stratum of the terminal performs cell selection or reselection operations;

[0108] Determine or indicate that the terminal or the access stratum of the terminal executes cell selection or reselection rules based on non-slices.

[0109] For example, the behavior of the access stratum of the terminal can be that when the access stratum of the terminal considers the second cell as an acceptable cell, the access stratum of the terminal camps on the second cell, the access stratum of the terminal performs restricted services or restricted transmissions, and the access stratum of the terminal performs cell selection or reselection operations.

[0110] Among them, the access stratum of the terminal can perform operations corresponding to those of the non-access stratum according to the indication of the non-access stratum.

[0111] In a possible implementation, the non-access stratum sends the required slice update indication and / or the updated first slice to the terminal or the access stratum of the terminal;

[0112] The terminal or the access stratum of the terminal performs the cell selection or reselection according to the slice update indication on demand and / or the updated first slice.

[0113] After the non-access stratum obtains the slice information supported by the second cell, it may update the slice according to the slice information supported by the second cell, or send a slice update indication to the access stratum to instruct the access stratum to update the slice; after the slice update is completed, the terminal or the access stratum of the terminal may perform slice-based cell selection or reselection according to the updated slice.

[0114] In a possible implementation manner, the first operation includes at least one of the following: the non-access stratum instructs the access stratum of the terminal to perform restricted service or restricted transmission; the non-access stratum instructs the access stratum of the terminal to perform normal service or normal transmission; the non-access stratum instructs the access stratum of the terminal to camp on the second cell.

[0115] That is, the access stratum of the terminal performing restricted service or restricted transmission may be instructed by the non-access stratum; or the access stratum of the terminal performing normal service or normal transmission may be instructed by the non-access stratum; or the access stratum of the terminal camping on the second cell may be instructed by the non-access stratum.

[0116] In a possible implementation manner, the non-access stratum sends a special instruction to the access stratum of the terminal; the access stratum of the terminal performs one of the following operations according to the special instruction:

[0117] Cell selection or reselection; selecting or reselecting to the second cell; camping on the first cell; performing non-slice-based cell selection or reselection.

[0118] Wherein, the access stratum of the terminal may receive the special instruction sent by the non-access stratum and perform at least one of cell selection or reselection; selecting or reselecting to the second cell; camping on the first cell; performing non-slice-based cell selection or reselection according to the special instruction.

[0119] For example, the special instruction may be NULL, and after receiving the special instruction sent by the non-access stratum, the access stratum of the terminal performs at least one of cell selection or reselection; selecting or reselecting to the second cell; camping on the first cell; performing non-slice-based cell selection or reselection.

[0120] In a possible implementation manner, the terminal or the access stratum of the terminal performs at least one of the following behaviors according to the first feedback information of the slice requirement message:

[0121] Perform restricted services or restricted transmissions; perform normal services or normal transmissions; reside in the second cell; select or reselect to the second cell; consider the second cell as an acceptable cell; consider the second cell as a suitable cell; perform cell selection or reselection operations; perform non-slice-based cell selection or reselection.

[0122] When the terminal or the access stratum of the terminal receives the first feedback information of the slice requirement message, it may perform the operations corresponding to the feedback information.

[0123] In a possible implementation, when the channel quality of the terminal satisfies the first condition, the access stratum of the terminal performs the cell selection or reselection.

[0124] In a possible implementation, when the frequency priority of the first cell is lower than the frequency priority of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold;

[0125] When the frequency priority of the first cell is not lower than the frequency priority of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

[0126] In the above solution, when the terminal or the access stratum of the terminal obtains the first message corresponding to the second cell, and the first message indicates that the second cell does not support the required slice corresponding to the first cell, it may send the slice requirement message to the non-access stratum. After receiving the slice requirement message, the non-access stratum sends the first feedback information corresponding to the slice requirement message, indicating that the access stratum completes all or part of the steps of cell selection or reselection.

[0127] When the non-access stratum indicates through the first feedback information that the terminal or the access stratum of the terminal completes all the steps of cell selection, the terminal or the access stratum of the terminal completes all the steps of cell selection according to the first feedback information; when the non-access stratum indicates through the first feedback information that the terminal or the access stratum of the terminal completes part of the steps of cell selection, the terminal or the access stratum of the terminal may complete part of the steps of cell selection according to the first feedback information, and then determine and perform the subsequent steps of the cell selection.

[0128] In a possible implementation, the first operation includes at least one of the following operations:

[0129] Reside in the second cell; perform restricted services or restricted transmissions; perform normal services or normal transmissions; consider the second cell as a suitable cell; consider the second cell as an acceptable cell; perform cell selection or reselection; retain slice-based cell selection or reselection rules; perform slice-based cell selection or reselection; select or reselect to the second cell; reside in the first cell.

[0130] In a possible implementation, the first operation includes at least one of the following operations:

[0131] The terminal camps on the second cell; the terminal performs restricted services or restricted transmissions; the terminal performs normal services or normal transmissions; the terminal performs cell selection or reselection; the terminal considers the second cell as a suitable cell; the terminal considers the second cell as an acceptable cell; the terminal performs slice-based cell selection or reselection; the terminal selects or reselects to the second cell; the terminal camps on the first cell.

[0132] In another possible implementation, the first operation includes at least one of the following operations:

[0133] The access stratum of the terminal indicates that the terminal camps on the second cell; the access stratum of the terminal indicates that the terminal performs restricted services or restricted transmissions; the access stratum of the terminal indicates that the terminal performs normal services or normal transmissions; the access stratum of the terminal indicates that the terminal performs cell selection or reselection; the access stratum of the terminal indicates that the terminal selects or reselects to the second cell; the access stratum of the terminal indicates that the terminal camps on the first cell.

[0134] That is, the above first operation can also be indicated by the access stratum of the terminal or performed by the access stratum of the terminal.

[0135] In a possible implementation, when the channel quality of the terminal meets the second condition, the access stratum of the terminal performs the cell selection or reselection.

[0136] In a possible implementation, when the frequency priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold;

[0137] When the frequency priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

[0138] In the above solution, the terminal or the access stratum of the terminal can send a slice requirement message to the non-access stratum; or the terminal or the access stratum of the terminal may also not send a slice requirement message to the non-access stratum.

[0139] Regardless of whether the terminal or the access stratum of the terminal sends a slice requirement message to the non-access stratum, the access stratum of the terminal can indicate all operations for the terminal or the access stratum of the terminal to perform cell selection, that is, in the above solution, the terminal or the non-access stratum of the terminal performs the cell selection step through the indication of the access stratum of the terminal.

[0140] In a possible implementation, the first operation includes at least one of the following operations:

[0141] Reside in the second cell; perform restricted service or restricted transmission; perform normal service or normal transmission; consider the second cell as a suitable cell; consider the second cell as an acceptable cell; perform cell selection or reselection; perform non-slice-based cell selection or reselection; select or reselect to the second cell; ignore slice-based cell selection or reselection rules; fallback to non-slice-based cell selection or reselection rules; reside in the first cell.

[0142] In a possible implementation, the first operation includes at least one of the following operations:

[0143] The access stratum of the terminal or indicates that the terminal resides in the second cell; the access stratum of the terminal indicates that the terminal performs restricted service or restricted transmission; the access stratum of the terminal indicates that the terminal performs restricted service or restricted transmission; the access stratum of the terminal indicates that the terminal performs cell selection or reselection; the access stratum of the terminal indicates that the terminal selects or reselects to the second cell; the access stratum of the terminal indicates that the terminal resides in the first cell.

[0144] That is, the above first operation can also be indicated by the access stratum of the terminal or performed by the access stratum of the terminal.

[0145] In a possible implementation, when the channel quality of the terminal meets the third condition, the terminal performs the cell selection or reselection.

[0146] In a possible implementation, when the frequency priority of the first cell is lower than the frequency priority of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold;

[0147] When the frequency priority of the first cell is not lower than the frequency priority of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

[0148] In the above solution, when the terminal or the access stratum of the terminal obtains the first message corresponding to the second cell, and the first message indicates that the second cell does not support the required slice corresponding to the first cell, the slice requirement message can be sent to the non-access stratum; or the terminal or the access stratum of the terminal may also not send the slice requirement message to the non-access stratum.

[0149] Regardless of whether the terminal or the access stratum of the terminal sends the slice requirement message to the non-access stratum, the access stratum of the terminal can indicate that the terminal or the access stratum of the terminal performs all operations of cell selection, that is, in the above solution, the terminal or the non-access stratum of the terminal performs the cell selection step through the indication of the access stratum of the terminal.

[0150] In a possible implementation, the access stratum of the terminal stores slice records; the slice records are used to indicate that the second cell does not support the first required slice; when the access stratum of the terminal determines that the second cell supports the first required slice, the access stratum of the terminal sends a slice recovery message to the non-access stratum; the slice recovery message is used to indicate that the second cell supports the first required slice; the access stratum of the terminal performs normal service or normal transmission.

[0151] In a possible implementation, the non-access stratum sends second feedback information to the access stratum of the terminal; when the access stratum of the terminal receives the second feedback information, the access stratum of the terminal performs normal service or normal transmission.

[0152] After the access stratum receives the slice recovery message, it notifies the non-access stratum that the second cell supports the first required slice. After the non-access stratum receives this notification, it sends second feedback information to the access stratum of the terminal. When the access stratum of the terminal receives the second feedback information, it instructs the access stratum of the terminal to enter normal service or normal transmission.

[0153] In a possible implementation, when the access stratum of the terminal determines that the second cell supports the first required slice, the terminal or the access stratum of the terminal performs slice-based cell selection or reselection.

[0154] After the access stratum of the terminal determines that the second cell supports the first required slice, the terminal or the access stratum of the terminal can re-perform slice-based cell selection or reselection.

[0155] In a possible implementation, the terminal or the access stratum of the terminal determines whether to perform the first operation according to second information.

[0156] In a possible implementation, the second information comes from a network device, or the second information is predefined.

[0157] Wherein, when the terminal or the access stratum of the terminal receives the second information, it determines to perform the first operation. When the terminal or the access stratum of the terminal does not receive the second information, it implements cell selection according to existing cell selection or reselection rules.

[0158] In summary, in the solution shown in the embodiments of the present application, when the second cell does not support the first required slice, the terminal obtains the first information indicating that the second cell does not support the first required slice, and performs cell selection or reselection according to the first information. In the above solution, in the case where the second cell does not support the required slice, according to the first information indicating that the second cell does not support the first required slice, the terminal performs cell selection or reselection, that is, when the terminal performs cell selection or cell reselection, the slice information supported by the cell is considered, ensuring that the terminal can normally perform cell selection when the second cell does not support the slice, and avoiding loss of coverage.

[0159] Please refer to Figure 4 , which shows a schematic flowchart of a cell selection method provided by an exemplary embodiment of the present application. As Figure 4 shown, the cell selection method includes the following steps:

[0160] S401, the access stratum of the UE obtains a first message.

[0161] At this time, the UE camps on the current cell (i.e., the first cell). The UE may camp on the first cell after obtaining the first message; the UE may also camp on the first cell while obtaining the first message; or the UE may obtain the first message after camping on the first cell.

[0162] Wherein, the first message is used to indicate that the second cell does not support the required slice of the first cell (i.e., the current cell).

[0163] S402, the access stratum of the UE sends a slice requirement message to the non-access stratum.

[0164] The slice requirement message includes at least one of a first slice indication message and a second slice indication message; the first slice indication message is used to indicate that the second cell does not support the required slice; the second slice indication message is used to indicate the slice information supported by the second cell.

[0165] S403, the non-access stratum sends feedback information to the access stratum of the UE to indicate the access stratum of the UE to perform a first operation.

[0166] In the embodiments of the present application, when the terminal or the access stratum of the terminal obtains the first message corresponding to the second cell, and the first message indicates that the second cell does not support the required slice corresponding to the first cell, the slice requirement message may be sent to the non-access stratum. After receiving the slice requirement message, the non-access stratum sends the first feedback information corresponding to the slice requirement message.

[0167] When the non-access stratum indicates to the terminal or the access stratum of the terminal that all steps of cell selection are completed through the first feedback information, the terminal or the access stratum of the terminal completes all steps of cell selection according to the first feedback information; when the non-access stratum indicates to the terminal or the access stratum of the terminal that some steps of cell selection are completed through the first feedback information, the terminal or the access stratum of the terminal may complete some steps of cell selection according to the first feedback information, and then determine and execute the subsequent steps of the cell selection.

[0168] For example, the solution of the embodiment of the present application may further include the following steps:

[0169] UE AS indicates to UE NAS that the intended slice (the required slice of the first cell) is unavailable.

[0170] UE performs corresponding actions according to the indication of NAS. Specifically, the NAS indication or AS behavior is one of the following: replace the intended slice, enter limited service (restricted service or restricted transmission), that is, enter normal service (normal service or normal transmission), indicate NULL (representing the use of the cell selection / reselection mechanism of 15 / 16, that is, cell selection or reselection based on non-slice).

[0171] For example: UE AS indicates to UE NAS the slices supported by the neighboring cell, that is, the available slice (the slice supported by the second cell), UE NAS replaces the intended slice, and notifies UE AS. UE AS performs cell selection / reselection (cell selection or reselection based on slice) based on the updated intended slice.

[0172] Alternatively, UE AS indicates to UE NAS that the neighboring cell does not support the intended slice. UE NAS instructs UE AS to enter limited service or camp (that is, enter normal service). UE AS performs corresponding operations.

[0173] Alternatively, UE AS indicates to UE NAS that the neighboring cell does not support the intended slice. UE NAS instructs UE AS with a NULL instruction. UE AS executes the existing cell selection / reselection rules (cell selection or reselection based on non-slice).

[0174] Furthermore, UE AS may notify UE NAS which slices are available.

[0175] Further, the UE AS may also indicate UE NAS requirements or the behavior of the UE AS, such as at least one of the following: requesting to change the intended slice, the UE AS will enter limited service, camp on a neighboring cell (i.e., enter normal service), and execute existing cell selection / reselection rules (i.e., non-slice-based cell selection or reselection rules).

[0176] Further, the UE AS retains a record (the intended slice is unavailable) and notifies the UE NAS again when the intended slice becomes available. At this time, the UE AS starts to obtain normal service, or starts to obtain normal service after feedback from the UE NAS.

[0177] Further, when the channel quality of the UE meets the first condition, the UE performs first cell selection / reselection. Among them, the first condition includes:

[0178] i. The signal strength in the current cell is lower than the threshold (the frequency priority of the current cell is low);

[0179] ii. The signal strength in the current cell is lower than the threshold, and the signal strength in the neighboring cell is higher than the threshold (equal priority, or the frequency priority of the current cell is high).

[0180] Please refer to Figure 5 , which shows a schematic flow diagram of the cell selection method provided by an exemplary embodiment of the present application, as Figure 5 shown, the cell selection method includes the following steps:

[0181] S501, the access stratum of the UE obtains a first message.

[0182] At this time, the UE camps on the current cell (i.e., the first cell). The UE may camp on the first cell after obtaining the first message; the UE may also camp on the first cell while obtaining the first message; or the UE may obtain the first message after camping on the first cell.

[0183] S502, the access stratum of the UE performs a first operation.

[0184] In the embodiments of the present application, the terminal or the access stratum of the terminal may send a slice requirement message to the non-access stratum; or the terminal or the access stratum of the terminal may also not send a slice requirement message to the non-access stratum.

[0185] Whether or not the access stratum of the terminal or the terminal sends a slice requirement message to the non-access stratum, the access stratum of the terminal may instruct the terminal or the access stratum of the terminal to perform all operations of cell selection. That is, in the above solution, the non-access stratum of the terminal or the terminal is instructed by the access stratum of the terminal to perform the cell selection steps.

[0186] For example, the solution shown in the embodiments of the present application may further include the following steps:

[0187] In the case where the current cell supports the slice required by the UE, but the neighboring cell does not support the required slice, the UE performs at least one of the following behaviors: camping on the neighboring cell, obtaining limited service, and considering the neighboring cell as an acceptable cell at least one.

[0188] Further, the UE AS instructs the UE NAS that the intended slice is unavailable.

[0189] Further, the UE AS may notify the UE NAS which slices are available.

[0190] Further, the UE AS may also instruct the behavior of the UE AS, such as at least one of the following: camping on the neighboring cell, obtaining limited service.

[0191] Further, the UE AS retains a record (the intended slice is unavailable) and notifies the UE NAS again when the intended slice is available. At this time, the UE AS starts to obtain normal service, or starts to obtain normal service after the UE NAS feedback.

[0192] Further, when the channel quality of the UE meets the second condition, the UE performs first cell selection / reselection. Among them, the second condition includes:

[0193] i. The signal strength of the serving cell is lower than the threshold (the priority of the serving cell frequency is low);

[0194] ii. The signal strength of the serving cell is lower than the threshold and the signal strength of the neighboring cell is higher than the threshold (equal priority, or the priority of the neighboring cell frequency is high).

[0195] Figure 6 is a schematic flowchart of a cell selection method provided by an exemplary embodiment of the present application. As Figure 6 shown, the cell selection method includes the following steps:

[0196] S601, the access stratum of the UE obtains a first message.

[0197] At this time, the UE camps on the current cell (i.e., the first cell). The UE may camp on the first cell after obtaining the first message; the UE may also camp on the first cell while obtaining the first message; or the UE may obtain the first message after camping on the first cell.

[0198] S602, the access stratum of the UE performs a first operation.

[0199] Moreover, in the embodiments of the present application, the first operation includes cell selection or reselection based on non-slice. That is, in the embodiments of the present application, the access stratum of the UE can directly select or fallback to the R15 / R16 mechanism, giving priority to ensuring that the UE does not lose coverage and service.

[0200] In the embodiments of the present application, when the terminal or the access stratum of the terminal obtains the first message corresponding to the second cell, and the first message indicates that the second cell does not support the required slice corresponding to the first cell, the slice requirement message may be sent to the non-access stratum; or the terminal or the access stratum of the terminal may also not send the slice requirement message to the non-access stratum.

[0201] Regardless of whether the terminal or the access stratum of the terminal sends the slice requirement message to the non-access stratum, the access stratum of the terminal may instruct the terminal or the access stratum of the terminal to perform all operations of cell selection. That is, in the above solution, the non-access stratum of the terminal or the terminal is instructed by the access stratum of the terminal to perform the cell selection steps.

[0202] For example, the solution shown in the embodiments of the present application may further include the following steps:

[0203] In the case where the current cell supports the slice required by the UE, but the neighboring cell does not support the required slice, the UE performs at least one of the following behaviors: adopting the existing cell selection / reselection rules, camping on the neighboring cell, obtaining normal service, and considering the neighboring cell as a suitable cell.

[0204] Further, the UE AS instructs the UE NAS that the intended slice is unavailable.

[0205] Further, the UE AS may notify the UE NAS of which slices are available.

[0206] Further, the UE AS may also instruct the behavior of the UE AS, such as at least one of the following: camping on the neighboring cell and obtaining limited service.

[0207] Furthermore, the UE AS retains the record (the intended slice cannot be used) and notifies the UE NAS when the intended slice can be used. At this time, the UE AS starts to obtain the normal service, or starts to obtain the normal service after the UE NAS feedback.

[0208] Furthermore, when the channel quality of the UE meets the third condition, the UE performs the first cell selection / reselection. Among them, the third condition includes:

[0209] i. The signal strength in the current cell is lower than the threshold (the priority of the frequency band of the current cell is low);

[0210] ii. The signal strength in the current cell is lower than the threshold, and the signal strength in the neighboring cell is higher than the threshold (equal priority, or the priority of the frequency band of the current cell is high).

[0211] Figure 7 The method flow chart of the cell selection method provided by an exemplary embodiment of the present application is shown. As Figure 7 shown, the cell selection method includes the following steps:

[0212] S701, the UE camps on the current cell.

[0213] In a possible implementation, the UE obtains multiple sets of cell selection / reselection parameters. One set (i.e., the second set) is used when the current cell supports but the neighboring cell does not support the intended slice, to ensure that the UE stays on the current cell as much as possible and ensure the continuity of the slice.

[0214] In a possible implementation, the UE obtains the first indication information. The appearance or being true of the first indication information represents that the UE is allowed to select the second set of parameters, or is allowed to stay on the current cell as much as possible to ensure the continuity of the slice.

[0215] In a possible implementation, the second set of parameters or the first indication information can be obtained by the UE from the current cell (system information) or the neighboring cell (system information), or can be stored previously.

[0216] S702, when the first cell supports the slice required by the UE, but the second cell does not support the required slice, the UE performs the second operation.

[0217] Among them, the second operation includes at least one of the following behaviors:

[0218] Adopt the second set of cell selection / reselection parameters to ensure that the UE stays in the current cell for a longer time, that is, select the neighboring cell to camp as late as possible.

[0219] If, based on the second set of cell selection / reselection parameters, the UE's channel quality in the serving cell is lower than the first threshold (existing parameters) but higher than the second threshold (second set of parameters), the UE stays in the current cell and does not perform cell selection or reselection.

[0220] If, based on the second set of cell selection / reselection parameters, the UE's channel quality in the neighboring cell is not higher than the third threshold (second set of parameters, and the third threshold is higher than the threshold of the existing parameters), the UE stays in the current cell and does not perform cell selection or reselection.

[0221] Otherwise (i.e., not meeting the above conditions), the UE follows the Figure 4 illustrated embodiments, Figure 5 illustrated embodiments, and Figure 6 one of the illustrated embodiments to perform subsequent operations.

[0222] It should be noted that the content or steps in the above various embodiments can be freely combined to implement the cell handover method involved in the present application. In practical applications, the content or steps in each embodiment can also be combined and implemented on a logical basis to achieve the technical effects described in each embodiment of the present application.

[0223] The following is an embodiment of the apparatus of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the method embodiment of the present application.

[0224] Please refer to Figure 8 , which shows a block diagram of a cell selection apparatus provided by an embodiment of the present application. This apparatus is for a terminal and has the function of implementing the above cell selection method. As Figure 8 shown, the apparatus may include:

[0225] A first information receiving module 801, configured to obtain, for the terminal, first information; the first information is used to indicate that a second cell does not support a first demand slice;

[0226] A cell selection module 802, configured to perform cell selection or reselection for the terminal according to the first information.

[0227] In a possible implementation, the first cell is the cell currently selected or camped on by the terminal; the second cell is different from the first cell.

[0228] In a possible implementation, the first information includes at least one of system information, dedicated information, information subscribed by the terminal, or information stored by the terminal.

[0229] In a possible implementation, the cell selection or reselection module includes:

[0230] A selection parameter determination sub-module, configured to determine cell selection or reselection parameters according to the first information;

[0231] A cell selection sub-module, configured to perform cell selection or reselection by the terminal according to the cell selection or reselection parameters;

[0232] In a possible implementation manner, the cell selection sub-module further includes:

[0233] A first parameter acquisition unit, configured to determine a first cell selection parameter as the cell selection or reselection parameter according to the first information;

[0234] Or.

[0235] A second parameter acquisition unit, configured to determine a second cell selection parameter as the cell selection or reselection parameter according to the first information.

[0236] In a possible implementation manner, the apparatus further includes:

[0237] A first indication message acquisition module, configured to acquire a first indication message according to the first information;

[0238] The first parameter acquisition unit is further configured to,

[0239] When the first indication information meets a first indication condition, determine a first cell selection or reselection parameter as the cell selection or reselection parameter;

[0240] The second parameter acquisition unit is further configured to,

[0241] When the first indication information meets a second indication condition, determine a second cell selection or reselection parameter as the cell selection or reselection parameter.

[0242] In a possible implementation manner, the second cell selection or reselection parameter is acquired by the terminal from the first cell;

[0243] Or, the second cell selection or reselection parameter is acquired by the terminal from the second cell; or, the second cell selection or reselection parameter is pre-stored or predefined by the terminal.

[0244] In a possible implementation manner, the first indication information is acquired by the terminal from the first cell;

[0245] Or, the first indication information is acquired by the terminal from the second cell;

[0246] Or, the first indication information is pre-stored or predefined by the terminal.

[0247] In a possible implementation, the second cell selection parameter includes a second threshold; the first cell selection parameter includes a first threshold; the apparatus further includes:

[0248] A first terminal residence module, configured to cause the terminal to reside in the first cell when the channel quality corresponding to the first cell for the terminal is not lower than the first threshold and not higher than the second threshold.

[0249] In a possible implementation, the second cell selection parameter further includes a third threshold; the apparatus further includes:

[0250] When the channel quality corresponding to the second cell for the terminal is not higher than the third threshold, the terminal resides in the first cell.

[0251] In a possible implementation, the apparatus further includes:

[0252] A first operation module, configured to cause the terminal to perform a first operation;

[0253] Wherein, the first operation includes at least one of the following operations:

[0254] Replace the first required slice;

[0255] Perform restricted service or restricted transmission;

[0256] Perform normal service or normal transmission;

[0257] Reside in the second cell;

[0258] Perform cell selection or reselection operation;

[0259] Select or reselect to the second cell;

[0260] Consider the second cell as an acceptable cell;

[0261] Consider the second cell as a suitable cell;

[0262] Fallback to non-slice-based cell selection or reselection rules;

[0263] Ignore the slice-based cell selection or reselection rules;

[0264] Perform non-slice-based cell selection or reselection;

[0265] Perform slice-based cell selection or reselection;

[0266] Reside in the first cell.

[0267] In a possible implementation, the apparatus further includes at least one of the following:

[0268] The first slice indication sending module is configured to instruct the access stratum of the terminal to send a first slice indication message to the non-access stratum; the first slice indication message is used to indicate that the second cell does not support the first required slice.

[0269] The second slice indication sending module is configured to instruct the access stratum of the terminal to send a second slice indication message to the non-access stratum; the second slice indication message is used to indicate the slice information supported by the second cell.

[0270] In a possible implementation, the cell selection module 802 includes:

[0271] The first feedback information sending module is configured to instruct the non-access stratum to send first feedback information regarding a slice requirement message to the terminal or the access stratum of the terminal; the slice requirement message includes at least one of the first slice indication message and the second slice indication message.

[0272] The first execution module, the terminal or the access stratum of the terminal performs one of the following operations according to the first feedback information regarding the slice requirement message:

[0273] Perform cell selection or reselection;

[0274] Determine the access behavior in the second cell;

[0275] Determine the execution steps of cell selection or reselection;

[0276] Or, camp on the first cell.

[0277] In a possible implementation, the first feedback information regarding the slice requirement message includes or is used to indicate at least one of the following:

[0278] Requirement slice update indication;

[0279] Update the first required slice;

[0280] Perform restricted service or restricted transmission;

[0281] Perform normal service or normal transmission;

[0282] Camp on the second cell;

[0283] Perform cell selection or reselection;

[0284] Select or reselect to the second cell;

[0285] Consider the second cell as an acceptable cell;

[0286] Determine that the second cell is a suitable cell;

[0287] Reside in the first cell.

[0288] In a possible implementation, the apparatus further includes:

[0289] A second execution module, configured to instruct the non-access stratum to perform at least one of the following operations according to the slice requirement message: update the first required slice;

[0290] Determine the behavior of the access stratum of the terminal.

[0291] In a possible implementation, the determining the behavior of the access stratum of the terminal includes at least one of the following:

[0292] Determine or instruct the terminal or the access stratum of the terminal to perform restricted services or restricted transmissions;

[0293] Determine or instruct the terminal or the access stratum of the terminal to perform normal services or normal transmissions;

[0294] Determine or instruct the terminal or the access stratum of the terminal to reside in the second cell;

[0295] Determine or instruct the terminal or the access stratum of the terminal to select or reselect to the second cell;

[0296] Determine or instruct the terminal or the access stratum of the terminal to consider the second cell as an acceptable cell;

[0297] Determine or instruct the terminal or the access stratum of the terminal to consider the second cell as a suitable cell;

[0298] Determine or instruct the terminal or the access stratum of the terminal to perform cell selection or reselection operations;

[0299] Determine or instruct the terminal or the access stratum of the terminal to perform cell selection or reselection rules based on non-slices.

[0300] In a possible implementation, the apparatus further includes:

[0301] An updated slice sending module, configured to instruct the non-access stratum to send the required slice update indication and / or the updated first required slice to the terminal or the access stratum of the terminal;

[0302] A slice cell reselection module, configured to instruct the terminal or the access stratum of the terminal to perform the cell selection or reselection according to the required slice update indication and / or the updated first required slice.

[0303] In a possible implementation, the execution of restricted services or restricted transmissions includes:

[0304] The non-access stratum instructs the access stratum of the terminal to execute restricted services or restricted transmissions;

[0305] The execution of normal services or normal transmissions includes:

[0306] The non-access stratum instructs the access stratum of the terminal to execute normal services or normal transmissions;

[0307] The terminal camping on the second cell includes:

[0308] The non-access stratum instructs the access stratum of the terminal to camp on the second cell.

[0309] In a possible implementation, the first execution module includes:

[0310] A special instruction sending sub-module, configured to instruct the non-access stratum to send a special instruction to the access stratum of the terminal;

[0311] A third operation execution sub-module, configured to instruct the access stratum of the terminal to perform one of the following operations according to the special instruction: cell selection or reselection;

[0312] Select or reselect to the second cell;

[0313] Camp on the first cell;

[0314] Perform non-slice-based cell selection or reselection.

[0315] In a possible implementation, the apparatus further includes:

[0316] A fourth operation module, configured to instruct the terminal or the access stratum of the terminal to perform at least one of the following behaviors according to the first feedback information of the slice requirement message:

[0317] Execute restricted services or restricted transmissions;

[0318] Execute normal services or normal transmissions;

[0319] Camp on the second cell;

[0320] Select or reselect to the second cell;

[0321] Consider the second cell as an acceptable cell;

[0322] Consider the second cell as a suitable cell;

[0323] Perform cell selection or reselection operations;

[0324] Perform non-slice-based cell selection or reselection.

[0325] In a possible implementation, the cell selection module 802 is further configured to,

[0326] When the channel quality of the terminal meets the first condition, the access stratum of the terminal performs the cell selection or reselection.

[0327] In a possible implementation, the first condition includes:

[0328] When the frequency priority of the first cell is lower than that of the second cell, the channel quality of the terminal corresponding to the first cell is less than the quality threshold;

[0329] When the frequency priority of the first cell is not lower than that of the second cell, the channel quality of the terminal corresponding to the first cell is less than the quality threshold, and the channel quality of the terminal corresponding to the second cell is greater than the quality threshold.

[0330] In a possible implementation, the first operation includes at least one of the following operations:

[0331] Reside in the second cell;

[0332] Perform restricted service or restricted transmission;

[0333] Perform normal service or normal transmission;

[0334] Consider the second cell as a suitable cell;

[0335] Consider the second cell as an acceptable cell;

[0336] Perform cell selection or reselection;

[0337] Retain the slice-based cell selection or reselection rule;

[0338] Perform slice-based cell selection or reselection;

[0339] Select or reselect to the second cell;

[0340] Reside in the first cell.

[0341] In a possible implementation, when the terminal resides in the second cell, it further includes:

[0342] The access stratum of the terminal instructs the terminal to reside in the second cell;

[0343] When the terminal performs restricted service or restricted transmission, it further includes:

[0344] The access stratum of the terminal instructs the terminal to perform restricted services or restricted transmissions;

[0345] For the terminal to perform normal services or normal transmissions, it further includes:

[0346] The access stratum of the terminal instructs the terminal to perform normal services or normal transmissions;

[0347] For the execution of cell selection or reselection, it further includes:

[0348] The access stratum of the terminal instructs the terminal to perform cell selection or reselection;

[0349] For the selection or reselection to the second cell, it further includes:

[0350] The access stratum of the terminal instructs the terminal to select or reselect to the second cell;

[0351] For the residence in the first cell, it further includes:

[0352] The access stratum of the terminal instructs the terminal to reside in the first cell.

[0353] In a possible implementation, the cell selection module 802 is further configured to,

[0354] When the channel quality of the terminal meets the second condition, the access stratum of the terminal performs the cell selection or reselection.

[0355] In a possible implementation, the second condition includes:

[0356] When the frequency priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold;

[0357] When the frequency priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

[0358] In a possible implementation, the first operation includes at least one of the following operations:

[0359] Reside in the second cell;

[0360] Perform restricted services or restricted transmissions;

[0361] Perform normal services or normal transmissions;

[0362] Consider the second cell as a suitable cell;

[0363] Consider the second cell as an acceptable cell;

[0364] Perform cell selection or reselection;

[0365] Perform non-slice-based cell selection or reselection;

[0366] Select or reselect to the second cell;

[0367] Ignore slice-based cell selection or reselection rules;

[0368] Fallback to non-slice-based cell selection or reselection rules;

[0369] Reside in the first cell.

[0370] In a possible implementation, when the terminal resides in the second cell, it further includes:

[0371] The access stratum of the terminal indicates that the terminal resides in the second cell;

[0372] When the terminal performs restricted services or restricted transmissions, it further includes:

[0373] The access stratum of the terminal indicates that the terminal performs restricted services or restricted transmissions;

[0374] When the terminal performs normal services or normal transmissions, it further includes:

[0375] The access stratum of the terminal indicates that the terminal performs restricted services or restricted transmissions;

[0376] When performing cell selection or reselection, it further includes:

[0377] The access stratum of the terminal indicates that the terminal performs cell selection or reselection;

[0378] When selecting or reselecting to the second cell, it further includes:

[0379] The access stratum of the terminal indicates that the terminal selects or reselects to the second cell;

[0380] When residing in the first cell, it further includes:

[0381] The access stratum of the terminal indicates that the terminal resides in the first cell.

[0382] In a possible implementation, the cell selection module 802 is further configured to,

[0383] When the channel quality of the terminal meets the third condition, the terminal performs the cell selection or reselection.

[0384] In a possible implementation, the third condition includes:

[0385] When the frequency point priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell at the terminal is less than the quality threshold;

[0386] When the frequency point priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell at the terminal is less than the quality threshold, and the channel quality corresponding to the second cell at the terminal is greater than the quality threshold.

[0387] In a possible implementation, the apparatus further includes at least one of the following:

[0388] A slice record saving module, configured to instruct the access stratum of the terminal to save a slice record; the slice record is used to indicate that the second cell does not support the first required slice;

[0389] A slice recovery message sending module, configured to instruct that when the access stratum of the terminal determines that the second cell supports the first required slice, the access stratum of the terminal sends a slice recovery message to the non-access stratum; the slice recovery message is used to indicate that the second cell supports the first required slice;

[0390] A normal service module, configured to instruct the access stratum of the terminal to perform normal service or normal transmission.

[0391] In a possible implementation, the normal service module further includes:

[0392] A second feedback information sending sub-module, configured to instruct the non-access stratum to send second feedback information to the access stratum of the terminal;

[0393] A normal service sub-module, configured to instruct that when the access stratum of the terminal receives the second feedback information, the access stratum of the terminal performs normal service or normal transmission.

[0394] In a possible implementation, the apparatus further includes:

[0395] A first operation determination module, configured to determine, by the terminal or the access stratum of the terminal, whether to perform the first operation according to second information.

[0396] In a possible implementation, the second information comes from a network device, or the second information is predefined.

[0397] In summary, in the solution shown in the embodiments of the present application, when the second cell does not support the first required slice, the terminal obtains first information indicating that the second cell does not support the first required slice, and performs cell selection or reselection according to the first information. In the above solution, in the case where the second cell does not support required slicing, according to the first information indicating that the second cell does not support the first required slice, the terminal performs cell selection or reselection, that is, when the terminal performs cell selection or cell reselection, it considers the slice information supported by the cell, ensuring that the terminal can normally perform cell selection when the second cell does not support slicing and avoiding loss of coverage.

[0398] It should be noted that when implementing its functions, the device provided in the above embodiments is only illustrated by dividing the above-mentioned various functional modules. In actual applications, the above functions can be allocated to different functional modules according to actual needs, that is, the content structure of the device is divided into different functional modules to complete all or part of the functions described above.

[0399] Regarding the device in the above embodiments, the specific manners in which each module performs operations have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0400] Please refer to Figure 9 , which shows a schematic structural diagram of a computer device 900 provided by an embodiment of the present application. The computer device 900 may include: a processor 901, a receiver 902, a transmitter 903, a memory 904, and a bus 905.

[0401] The processor 901 includes one or more processing cores. The processor 901 executes various functional applications and information processing by running software programs and modules.

[0402] The receiver 902 and the transmitter 903 may be implemented as a communication component, and the communication component may be a communication chip. The communication chip may also be referred to as a transceiver.

[0403] The memory 904 is connected to the processor 901 through the bus 905.

[0404] The memory 904 may be used to store a computer program, and the processor 901 is used to execute the computer program to implement the respective steps performed by the server device, the configuration device, the cloud platform, or the account server in the above method embodiments.

[0405] In addition, the memory 904 may be implemented by any type of volatile or non-volatile storage device or a combination thereof. Volatile or non-volatile storage devices include, but are not limited to: magnetic disks or optical disks, electrically erasable programmable read-only memories, erasable programmable read-only memories, static random access memories, read-only memories, magnetic memories, flash memories, programmable read-only memories.

[0406] In an exemplary embodiment, the computer device includes a processor, a memory, and a transceiver (the transceiver may include a receiver and a transmitter, the receiver is used to receive information, and the transmitter is used to send information);

[0407] In a possible implementation manner, when the computer device is implemented as a terminal, the terminal includes a processor, a memory, and a transceiver;

[0408] The transceiver is used to obtain first information; the first information is used to indicate that the second cell does not support the first demand slice;

[0409] The processor is used to instruct the terminal to perform cell selection or reselection according to the first information.

[0410] The processor and transceiver in the terminal involved in the embodiments of the present application may execute the steps performed by the terminal in any of the Figures 2 to 7 cell selection methods shown above, which will not be elaborated here.

[0411] The embodiments of the present application also provide a computer-readable storage medium. A computer program is stored in the storage medium, and the computer program is loaded and executed by a processor to implement each of the Figures 2 to 7 steps in any of the cell selection methods shown above.

[0412] The present application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes each of the Figures 2 to 5 steps in any of the cell selection methods shown above.

[0413] Those skilled in the art should be able to realize that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented by hardware, software, firmware, or any combination thereof. When implemented using software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or codes on a computer-readable medium. The computer-readable medium includes computer storage media and communication media, where the communication media includes any medium that facilitates the transfer of a computer program from one place to another. The storage media can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0414] The foregoing are only exemplary embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A cell selection method, characterized in that, The method is used for a terminal, and the method includes: The terminal obtains first information; the first information is used to indicate that a second cell does not support a first required slice. Based on the first information, the terminal performs cell selection or reselection. Wherein, the first required slice is a required slice supported by a first cell, and the required slice supported by the first cell is the slice required when the terminal camps on the first cell. Wherein, the method further includes: The terminal performs a first operation. Wherein, the first operation includes at least one of the following operations: Fallback to cell selection or reselection rules based on non-slices; Ignore cell selection or reselection rules based on slices; Perform cell selection or reselection based on non-slices.

2. The method according to claim 1, wherein The first cell is the cell currently selected or camped on by the terminal; the second cell is different from the first cell.

3. The method according to claim 1, wherein The first information is included in at least one of system information, dedicated information, information subscribed by the terminal, or information stored by the terminal.

4. The method according to claim 1, wherein The step that, based on the first information, the terminal performs cell selection or reselection includes: Based on the first information, determine cell selection or reselection parameters. Based on the cell selection or reselection parameters, the terminal performs cell selection or reselection.

5. The method according to claim 4, wherein The step that, based on the first information, determine cell selection or reselection parameters includes: Based on the first information, determine a first cell selection parameter as the cell selection or reselection parameter. Or, Based on the first information, determine a second cell selection parameter as the cell selection or reselection parameter.

6. The method according to claim 5, characterized in that The method further includes: Based on the first information, obtain first indication information. The step that, based on the first information, determine a first cell selection or reselection parameter as the cell selection or reselection parameter includes: When the first indication information meets a first indication condition, determine the first cell selection or reselection parameter as the cell selection or reselection parameter. The step that, based on the first information, determine a second cell selection or reselection parameter as the cell selection or reselection parameter includes: When the first indication information meets a second indication condition, determine the second cell selection or reselection parameter as the cell selection or reselection parameter.

7. The method according to claim 6, wherein The second cell selection or reselection parameter is obtained by the terminal from the first cell. Or, the second cell selection or reselection parameter is obtained by the terminal from the second cell; or, the second cell selection or reselection parameter is pre-stored or predefined by the terminal.

8. The method according to claim 6, characterized in that, The first indication information is obtained by the terminal from the first cell. Or, the first indication information is obtained by the terminal from the second cell. Or, the first indication information is pre-stored or predefined by the terminal.

9. The method according to any one of claims 5 to 8, characterized in that The second cell selection parameter includes a second threshold; the first cell selection parameter further includes a first threshold; the method further includes: When the channel quality corresponding to the terminal and the first cell is not lower than the first threshold and not higher than the second threshold, the terminal camps on the first cell.

10. The method according to any one of claims 5 to 8, characterized in that, The second cell selection parameter further includes a third threshold; the method further includes: When the channel quality corresponding to the second cell is not higher than the third threshold, the terminal camps on the first cell.

11. According to the method described in any one of claims 1 to 8, characterized in that, The first operation further includes at least one of the following operations: Replace the first required slice; Perform restricted services or restricted transmissions; Perform normal services or normal transmissions; Camp on the second cell; Perform cell selection or reselection operations; Select or reselect to the second cell; Consider the second cell as an acceptable cell; Consider the second cell as a suitable cell; Perform slice-based cell selection or reselection; Camp on the first cell.

12. The method according to claim 11, wherein The method further includes at least one of the following: The access stratum of the terminal sends a first slice indication message to the non-access stratum; the first slice indication message is used to indicate that the second cell does not support the first required slice; The access stratum of the terminal sends a second slice indication message to the non-access stratum; the second slice indication message is used to indicate the slice information supported by the second cell.

13. The method according to claim 12, wherein According to the first information, the terminal performs the cell selection or reselection, including: The non-access stratum sends first feedback information for a slice requirement message to the terminal or the access stratum of the terminal; the slice requirement message includes at least one of the first slice indication message and the second slice indication message; The terminal or the access stratum of the terminal performs one of the following operations according to the first feedback information for the slice requirement message: Perform cell selection or reselection; Determine the access behavior in the second cell; Determine the execution steps of cell selection or reselection; Or, camp on the first cell.

14. The method according to claim 13, characterized in that, The first feedback information for the slice requirement message includes or is used to indicate at least one of the following: Required slice update indication; Update the first required slice; Perform restricted services or restricted transmissions; Perform normal services or normal transmissions; Camp on the second cell; Perform cell selection or reselection; Select or reselect to the second cell; Consider the second cell as an acceptable cell; Consider the second cell as a suitable cell; Camp on the first cell.

15. The method according to claim 14, wherein The method further includes: The non-access stratum performs at least one of the following operations according to the slice requirement message: Update the first required slice; Determine the behavior of the access stratum of the terminal.

16. The method according to claim 15, characterized in that, Determining the behavior of the access stratum of the terminal includes at least one of the following: Determine or indicate that the terminal or the access stratum of the terminal performs restricted services or restricted transmissions; Determine or indicate that the terminal or the access stratum of the terminal performs normal services or normal transmissions; Determine or indicate that the terminal or the access stratum of the terminal camps on the second cell; Determine or indicate that the terminal or the access stratum of the terminal selects or reselects to the second cell; Determine or indicate that the terminal or the access stratum of the terminal considers the second cell as an acceptable cell; Determine or indicate that the terminal or the access stratum of the terminal considers the second cell as a suitable cell; Determine or indicate that the terminal or the access stratum of the terminal performs cell selection or reselection operations; Determine or indicate that the terminal or the access stratum of the terminal performs non-slice-based cell selection or reselection.

17. The method according to claim 14, wherein The method further includes: The non-access stratum sends the demand slice update indication and / or the updated first demand slice to the terminal or the access stratum of the terminal. The terminal or the access stratum of the terminal performs the cell selection or reselection according to the demand slice update indication and / or the updated first demand slice.

18. The method according to claim 14, wherein The performing of restricted service or restricted transmission includes: The non-access stratum instructs the access stratum of the terminal to perform restricted service or restricted transmission. The performing of normal service or normal transmission includes: The non-access stratum instructs the access stratum of the terminal to perform normal service or normal transmission. The terminal camping on the second cell includes: The non-access stratum instructs the access stratum of the terminal to camp on the second cell.

19. The method according to claim 13, characterized in that, The terminal or the access stratum of the terminal performing the cell selection or reselection includes: The non-access stratum sends a special instruction to the access stratum of the terminal. The access stratum of the terminal performs one of the following operations according to the special instruction: Cell selection or reselection; Selecting or reselecting to the second cell; Camping on the first cell; Performing non-slice-based cell selection or reselection.

20. The method according to claim 13, wherein The method further includes: The terminal or the access stratum of the terminal performs at least one of the following behaviors according to the first feedback information of the slice demand message: Performing restricted service or restricted transmission; Performing normal service or normal transmission; Camping on the second cell; Selecting or reselecting to the second cell; Considering the second cell as an acceptable cell; Considering the second cell as a suitable cell; Performing cell selection or reselection operations; Performing non-slice-based cell selection or reselection.

21. The method according to claim 13, wherein The terminal performing the cell selection or reselection according to the first information includes: When the channel quality of the terminal meets the first condition, the access stratum of the terminal performs the cell selection or reselection.

22. The method according to claim 21, wherein The first condition includes: When the frequency point priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold. When the frequency point priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

23. The method according to claim 11, wherein The first operation includes at least one of the following operations: Camping on the second cell; Performing restricted service or restricted transmission; Performing normal service or normal transmission; Considering the second cell as a suitable cell; Considering the second cell as an acceptable cell; Performing cell selection or reselection; Retaining the slice-based cell selection or reselection rule; Performing slice-based cell selection or reselection; Selecting or reselecting to the second cell; Camping on the first cell.

24. The method according to claim 23, wherein The terminal camping on the second cell further includes: The access stratum of the terminal instructs the terminal to camp on the second cell. The terminal performing restricted service or restricted transmission further includes: The access stratum of the terminal instructs the terminal to perform restricted services or restricted transmissions; The terminal performs normal services or normal transmissions, and further includes: The access stratum of the terminal instructs the terminal to perform normal services or normal transmissions; The execution of cell selection or reselection further includes: The access stratum of the terminal instructs the terminal to perform cell selection or reselection; The selection or reselection to the second cell further includes: The access stratum of the terminal instructs the terminal to select or reselect to the second cell; The residence in the first cell further includes: The access stratum of the terminal instructs the terminal to reside in the first cell.

25. The method according to claim 23, characterized in that, The terminal performs the cell selection or reselection according to the first information, including: When the channel quality of the terminal satisfies a second condition, the access stratum of the terminal performs the cell selection or reselection.

26. The method according to claim 25, wherein The second condition includes: When the frequency priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than a quality threshold; When the frequency priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

27. The method according to claim 11, wherein The first operation includes at least one of the following operations: Reside in the second cell; Perform restricted services or restricted transmissions; Perform normal services or normal transmissions; Consider the second cell as a suitable cell; Consider the second cell as an acceptable cell; Perform cell selection or reselection; Perform non-slice-based cell selection or reselection; Select or reselect to the second cell; Ignore slice-based cell selection or reselection rules; Fallback to non-slice-based cell selection or reselection rules; Reside in the first cell.

28. The method according to claim 27, wherein The terminal resides in the second cell, and further includes: The access stratum of the terminal or instructs the terminal to reside in the second cell; The terminal performs restricted services or restricted transmissions, and further includes: The access stratum of the terminal instructs the terminal to perform restricted services or restricted transmissions; The terminal performs normal services or normal transmissions, and further includes: The access stratum of the terminal instructs the terminal to perform normal services or normal transmissions; The execution of cell selection or reselection further includes: The access stratum of the terminal instructs the terminal to perform cell selection or reselection; The selection or reselection to the second cell further includes: The access stratum of the terminal instructs the terminal to select or reselect to the second cell; The residence in the first cell further includes: The access stratum of the terminal instructs the terminal to reside in the first cell.

29. The method according to claim 28, wherein The terminal performs the cell selection or reselection according to the first information, including: When the channel quality of the terminal satisfies a third condition, the terminal performs the cell selection or reselection.

30. The method according to claim 29, wherein The third condition includes: When the frequency priority of the first cell is lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than a quality threshold; When the frequency priority of the first cell is not lower than that of the second cell, the channel quality corresponding to the first cell of the terminal is less than the quality threshold, and the channel quality corresponding to the second cell of the terminal is greater than the quality threshold.

31. The method according to claim 11, wherein The method further includes at least one of the following: The access stratum of the terminal stores a slice record; the slice record is used to indicate that the second cell does not support the first required slice; When the access stratum of the terminal determines that the second cell supports the first required slice, the access stratum of the terminal sends a slice recovery message to the non-access stratum; the slice recovery message is used to indicate that the second cell supports the first required slice; The access stratum of the terminal performs normal service or normal transmission.

32. The method according to claim 31, characterized in that, The access stratum of the terminal performing normal service includes: The non-access stratum sends second feedback information to the access stratum of the terminal; When the access stratum of the terminal receives the second feedback information, the access stratum of the terminal performs normal service or normal transmission.

33. The method according to claim 31, characterized in that, The method further includes: When the access stratum of the terminal determines that the second cell supports the first required slice, the terminal or the access stratum of the terminal performs cell selection or reselection rules based on slices.

34. The method according to claim 11, wherein The method further includes: The terminal or the access stratum of the terminal determines whether to perform the first operation according to second information.

35. The method according to claim 34, wherein The second information comes from a network device, or the second information is predefined.

36. A cell selection device, characterized in that, The device is for a terminal, and the device includes: A first information receiving module, configured to obtain first information; the first information is used to indicate that a second cell does not support a first required slice; A cell selection module, configured to perform cell selection or reselection according to the first information; Wherein, the first required slice is a required slice supported by a first cell, and the required slice supported by the first cell is the slice required when the terminal camps on the first cell; Wherein, the device further includes: A first operation module, configured to perform a first operation on the terminal; Wherein, the first operation includes at least one of the following operations: Fallback to cell selection or reselection rules based on non-slices; Ignore cell selection or reselection rules based on slices; Perform cell selection or reselection based on non-slices.

37. A terminal, characterized in that, The terminal includes a processor, a memory, and a transceiver; The transceiver is configured to obtain first information; the first information is used to indicate that a second cell does not support a first required slice; The processor is configured to perform cell selection or reselection according to the first information; Wherein, the first required slice is a required slice supported by a first cell, and the required slice supported by the first cell is the slice required when the terminal camps on the first cell; Wherein, the processor is further configured to perform a first operation; Wherein, the first operation includes at least one of the following operations: Fallback to cell selection or reselection rules based on non-slices; Ignore cell selection or reselection rules based on slices; Perform cell selection or reselection based on non-slices.

38. A computer-readable storage medium, characterized in that, The storage medium stores a computer program, which is used to be executed by a processor to implement the cell selection method according to any one of claims 1 to 35.

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