Method, device, equipment and storage medium for using slice information

Abstract

The present application discloses a method, device, equipment and storage medium for using slice information, which relates to the field of wireless communications. The method includes: when the AS layer of the terminal obtains the slice information of the terminal, limiting the use of the slice information. It is only used for at least one of cell selection, cell reselection, resource selection and access to the network, and can ensure that the terminal quickly accesses the corresponding network slice according to the slice information. Slice information is not allowed to be reported to the network device, which can avoid the security risk of possible leakage of slice information in the unencrypted message sent by the terminal to the network device.

Description

[0001] This application is a divisional application of the invention patent application with application date of October 23, 2020, application number 202080103951.5, and invention name “Method, device, equipment and storage medium for using slice information”. Technical Field

[0002] The present application relates to the field of wireless communications, and in particular to a method, apparatus, device and storage medium for using slice information. Background Art

[0003] The demand for wireless communication network performance in various industries is increasing day by day. At present, for wireless communication networks, network slicing based on the Radio Access Network (RAN) can provide lower latency, more targeted, greater flexibility and higher scalability services for different services.

[0004] However, further discussion and research are needed on the use of network slicing. Summary of the invention

[0005] The present application provides a method, device, equipment and storage medium for using slice information. The technical solution is as follows.

[0006] According to one aspect of the present application, a method for using slice information is provided, which is applied to a terminal, wherein the terminal includes an AS layer, and the method includes:

[0007] When the AS layer of the terminal obtains the slice information of the terminal, the use of the slice information is restricted.

[0008] According to another aspect of the present application, a method for using slice information is provided, which is applied in a terminal, and the method includes:

[0009] When the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information;

[0010] Among them, the first frequency priority information is the frequency priority information saved by the terminal for the network slice, and the second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice.

[0011] According to another aspect of the present application, a device for using slice information is provided, the device including an AS layer, the device including:

[0012] A restriction module is used to restrict the use of the slice information when the AS layer of the device obtains the slice information of the device.

[0013] Optionally, limiting the use of the slice information includes:

[0014] The slice information is only used for at least one of cell selection, cell reselection, resource selection and network access;

[0015] and / or,

[0016] The slice information is not allowed to be reported to the network device.

[0017] Optionally, after the device completes the random access process, it is not allowed to report the slice information to the network device through a first message, and the first message is used by the device to reply to the network device with a message that the wireless resource control establishment or reconstruction is completed.

[0018] Optionally, the restriction module is used to restrict the use of the slice information when the AS layer of the device obtains the slice information of the device and satisfies the first condition.

[0019] Optionally, the first condition includes at least one of the following:

[0020] The communication protocol version supported by the device is equal to or greater than the specified communication protocol version;

[0021] The device is a device that supports at least one of cell selection, cell reselection, resource selection, and network access based on the slice information;

[0022] The device is a device having the capability of performing at least one of cell selection, cell reselection, resource selection, and network access based on the slice information;

[0023] The device is a device supporting network slicing;

[0024] A restriction indication sent by the network device is received.

[0025] Optionally, the slice information includes at least one of the following:

[0026] The slice identifier corresponding to the network slice;

[0027] Slice priority information corresponding to the network slice;

[0028] Frequency information corresponding to the network slice;

[0029] The frequency priority information corresponding to the network slice.

[0030] Optionally, the slice information is determined by the device; or, the slice information is indicated or configured by the network device.

[0031] Optionally, the device further includes a NAS layer, and the device further includes:

[0032] A sending module, used for the NAS layer of the device to send the slice information to the AS layer.

[0033] Optionally, the device further comprises:

[0034] The first determination module is used for the NAS layer of the device to determine whether to send the slice information to the AS layer according to the mode indication from the core network device.

[0035] Optionally, the first determining module is used to:

[0036] When the mode indication is the first mode indication, determining to send the slice information to the AS layer;

[0037] When the mode indication is the second mode indication, determining not to send the slice information to the AS layer;

[0038] The first mode indication is sent by the core network device when the apparatus satisfies the second condition, and the second mode indication is sent by the core network device when the apparatus does not satisfy the second condition.

[0039] Optionally, the device further comprises:

[0040] The second determination module is used for the NAS layer of the device to determine whether to send the slice information to the AS layer according to the second condition.

[0041] Optionally, the second determining module is used to:

[0042] When the NAS layer of the device determines that the device does not meet the second condition, determining not to send the slice information to the AS layer;

[0043] When the NAS layer of the device determines that the device satisfies the second condition, it determines to send the slice information to the AS layer.

[0044] Optionally, the second condition includes at least one of the following:

[0045] The communication protocol version supported by the device is equal to or greater than the specified communication protocol version;

[0046] The device is a device that supports at least one of cell selection, cell reselection, resource selection, and network access based on the slice information;

[0047] The device is a device having the capability of performing at least one of cell selection, cell reselection, resource selection, and network access based on the slice information;

[0048] The device is a device that supports network slicing.

[0049] According to another aspect of the present application, a device for using slice information is provided, the device comprising:

[0050] a processing module, configured to use the second frequency priority information, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information, when the first frequency priority information and the second frequency priority information of the network slice are different;

[0051] Among them, the first frequency priority information is the frequency priority information saved by the device for the network slice, and the second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice.

[0052] Optionally, the processing module is used to:

[0053] In a first case, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information. The first case includes at least one of the following:

[0054] T320 timer has not timed out;

[0055] The first timer has not timed out, and before the first timer times out, the first frequency priority information is valid;

[0056] The device does not initiate an RRC connection establishment process;

[0057] The device is in a disconnected state.

[0058] Optionally, the device further includes an acquisition module, wherein the acquisition module is configured to:

[0059] The AS layer of the device obtains the first frequency priority information through system information;

[0060] or,

[0061] The AS layer of the device obtains the first frequency priority information through a dedicated RRC message;

[0062] or,

[0063] The AS layer of the device obtains the first frequency priority information from the NAS layer, and the first frequency priority information is obtained by the NAS layer from a core network device.

[0064] Optionally, the device further comprises:

[0065] A receiving module is used for the device to receive slice information indicated or configured by a network device, wherein the slice information includes the second frequency priority information.

[0066] Optionally, the slice information further includes at least one of the following:

[0067] The slice identifier corresponding to the network slice;

[0068] Slice priority information corresponding to the network slice;

[0069] Frequency information corresponding to the network slice;

[0070] The frequency priority information corresponding to the network slice.

[0071] Optionally, the receiving module is used to:

[0072] The apparatus receives a dedicated RRC message sent by an access network device, where the dedicated RRC message carries the slice information;

[0073] or,

[0074] The apparatus receives a broadcast message sent by the access network device, where the broadcast message carries the slice information;

[0075] or,

[0076] The device receives a NAS message sent by a core network device, and the NAS message carries the slice information.

[0077] According to another aspect of the present application, a terminal is provided, comprising: a processor; a transceiver connected to the processor; and a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the method for using slice information as described in the above aspects.

[0078] According to another aspect of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the method for using slice information as described in the above aspects.

[0079] According to another aspect of the present application, a computer program product is provided, wherein the readable storage medium stores executable instructions, and the executable instructions are loaded and executed by the processor to implement the method for using slice information as described in the above aspects.

[0080] According to another aspect of the present application, a chip is provided, wherein the chip is used to execute the method for using slice information as described in the above aspects.

[0081] The technical solution provided by this application includes at least the following beneficial effects:

[0082] When the AS layer of the terminal obtains the slice information of the terminal, the use of the slice information will be restricted. It is only used for at least one of cell selection, cell reselection, resource selection and access to the network, which can ensure that the terminal quickly accesses the corresponding network slice according to the slice information. Slice information is not allowed to be reported to the network device, which can avoid the security risk of possible leakage of slice information in the unencrypted message sent by the terminal to the network device. BRIEF DESCRIPTION OF THE DRAWINGS

[0083] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0084] Figure 1 is a network architecture diagram of a communication system provided by an exemplary embodiment of the present application;

[0085] Figure 2 is a flow chart of a method for using slice information provided by an exemplary embodiment of the present application;

[0086] Figure 3 is a flow chart of a method for using slice information provided by an exemplary embodiment of the present application;

[0087] Figure 4 It is a schematic diagram of an implementation process of the AS layer of a terminal obtaining slice information provided by an exemplary embodiment of the present application;

[0088] Figure 5 is a flow chart of a method for using slice information provided by an exemplary embodiment of the present application;

[0089] Figure 6 is a flow chart of a method for using slice information provided by an exemplary embodiment of the present application;

[0090] Figure 7It is a schematic diagram of an implementation process of a terminal acquiring first frequency priority information and second frequency priority information provided by an exemplary embodiment of the present application;

[0091] Figure 8 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0092] Fig. 9 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0093] Fig.10 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0094] Fig.11 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0095] Fig.12 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0096] Fig.13 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0097] Fig.14 is a block diagram of a device for using slice information provided by an exemplary embodiment of the present application;

[0098] Fig.15 It is a schematic diagram of the structure of a terminal provided by an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0099] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0100] The demand for wireless communication network performance in various industries is increasing day by day. In order to improve the performance of wireless communication networks in terms of latency, mobility, reliability and location accuracy, network slicing of RAN is usually used. For a network slice, it has an independent topology, virtual network resources, traffic and configuration rules. That is, a network slice is a collection of network functions with specific wireless configurations and transmission configurations, which can provide multiple different end-to-end virtual networks on the same set of network equipment. For example, network slices are provided specifically for the Internet of Things (IOT) field, network slices are provided specifically for the Internet of Vehicles field, and network slices are provided specifically for specific users. In the process of establishing network slices of RAN, service providers using network slices can participate in the design, deployment and operation of RAN, so as to better support the service provider's business according to the needs of the service provider.

[0101] Currently, in Release 17 (5G communication protocol version, also known as R17), the application of RAN to network slicing is enhanced, including: based on network slicing, user equipment (UE) performs cell reselection (cell reselection). And, based on network slicing, determines the configuration or access restriction of the UE's random access channel (RACH).

[0102] Current use of network slicing

[0103] At present, when the access stratum (AS) of the UE receives the slice information of the network slice of the non-access stratum (NAS) of the UE, such as the single network slice selection indication information (S-NSSAI) or the network slice selection indication information (NSSAI), the UE sends the S-NSSAI or NSSAI to the 5G base station (5G Node B, gNB), and the gNB can select the corresponding access and mobility management function (AMF) entity to provide the service corresponding to the network slice according to the S-NSSAI or NSSAI. Among them, S-NSSAI or NSSAI is used to identify the network slice corresponding to the UE. S-NSSAI is used to identify a single network slice, and NSSAI can include multiple S-NSSAIs. When the UE sends S-NSSAI or NSSAI to the gNB (e.g., based on the MSG5 message, which is used by the UE to reply to the gNB that the radio resource control establishment or re-establishment is complete), the message sent is unencrypted, which may lead to the leakage of slice information and pose a security risk.

[0104] Cell Reselection

[0105] Cell reselection refers to the process in which a UE, in idle mode, selects and accesses a cell with the best signal by monitoring the signal quality of the currently connected cell and the neighboring cells of the currently connected cell. When the signal quality and level of the neighboring cell meet the S (Srxlev) criterion and certain reselection decision criteria, the UE will access the neighboring cell for resident. The reselection decision criteria refers to the process in which the UE performs cell selection and reselection. In order to meet the load balancing in idle mode, the cell reselection strategy based on frequency priority will be used for cell reselection.

[0106] After the UE resides in a cell, it will continue to measure the cell. Based on the measurement results of the Reference Signal Received Power (RSRP) at the Radio Resource Control (RRC) layer, the UE calculates the S value and compares it with the intra-frequency measurement start threshold (Sintrasearch) and the inter-frequency / inter-system measurement start threshold (Snonintrasearch) to determine whether to start the measurement of the adjacent cell.

[0107] For cells with the same frequency or cells with different frequencies but the same priority, the UE uses the R criterion to reselect the cell. Specifically, the UE sorts the cells according to their signal quality and selects the cell with the best signal quality as the candidate reselection target cell. For cells with high frequency priority, as long as the cell signal quality meets a certain threshold, the UE will reselect to a cell with a high frequency priority. For cells with low frequency priority, the UE will reselect to the cell with low frequency priority only when the signal quality of the cell where the UE is located is lower than a certain threshold.

[0108] The UE can obtain the frequency priority information indicating the frequency priority through system information and dedicated information (such as RRCrelease message) transmitted between the UE and the network device. The UE can select or reselect a cell based on the frequency priority information. The frequency priority information in the RRCrelease message is valid within the duration of the UE's first timer (such as T320) and / or becomes invalid after the UE enters the connected state.

[0109] However, in a network with network slicing, the frequency priority corresponding to a network slice may be different in different cells. As a result, the frequency priority obtained by the UE in the previous cell may be different from the priority of the same frequency in the new cell when the UE moves to another cell, that is, the frequency priority information changes. However, the timer in the UE may not have timed out at this time, which will cause the UE to be unable to select a cell that is compatible with the frequency priority of the network slice it is in. This causes problems with the services provided by the network slice used by the UE. For example, in terms of latency performance, the UE accesses a new cell, but in the new cell, the frequency priority of the network slice used by the UE is lower. When the UE needs to use the service carried by the network slice, the network device needs to transfer the UE to other cells, causing transmission delays in the services used by the UE through the network slice.

[0110] Figure 1 A schematic diagram of a system architecture provided by an embodiment of the present application is shown. The system architecture may include: a terminal device 10, an access network device 20 and a core network device 30.

[0111] The terminal device 10 may refer to a UE, an access terminal, a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a wireless communication device, a user agent or a user device. Optionally, the terminal device may also be a cellular phone, a cordless phone, a SIP (Session Initiation Protocol) phone, a WLL (Wireless Local Loop) station, a PDA (Personal Digital Assistant), a handheld device with a wireless communication function, a computing device or other processing devices connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5GS or a terminal device in a future evolved PLMN (Public Land Mobile Network), etc., and the embodiments of the present application are not limited thereto. For the convenience of description, the above-mentioned devices are collectively referred to as terminals. The number of terminal devices 10 is usually multiple, and one or more terminal devices 10 may be distributed in a cell managed by each access network device 20.

[0112] The access network device 20 is a device deployed in the access network to provide wireless communication functions for the terminal device 10. The access network device 20 may include various forms of macro base stations, micro base stations, relay stations, access points, etc. In systems using different wireless access technologies, the names of devices with access network device functions may be different, for example, in the 5G NR system, they are called gNodeB or gNB. With the evolution of communication technology, the name "access network device" may change. For the convenience of description, in the embodiment of the present application, the above-mentioned devices that provide wireless communication functions for the terminal device 10 are collectively referred to as access network devices. Optionally, a communication relationship can be established between the terminal device 10 and the core network device 30 through the access network device 20. Exemplarily, in a Long Term Evolution (LTE) system, the access network device 20 may be one or more eNodeBs in EUTRAN (Evolved Universal Terrestrial Radio Access Network) or EUTRAN; in a 5G NR (5G New Radio) system, the access network device 20 may be one or more gNBs in RAN (Radio Access Network) or RAN.

[0113] The function of the core network device 30 is mainly to provide user connection, user management and service bearing, and to provide an interface to the external network as a bearer network. For example, the core network equipment in the 5G NR system may include devices such as AMF entity, UPF (User Plane Function) entity and SMF (Session Management Function) entity.

[0114] In one example, the access network device 20 and the core network device 30 communicate with each other via some air technology, such as the NG interface in the 5G NR system. The access network device 20 and the terminal device 10 communicate with each other via some air technology, such as the Uu interface.

[0115] It should be noted that the terminal device 10 includes an AS layer and a NAS layer. The AS layer is used for information transmission between the terminal device 10 and the access network device 20 to which the terminal device 10 accesses. The NAS layer is used for information transmission between the terminal device 10 and the core network device 30 to which the terminal device 10 accesses. During the information transmission between the terminal device 10 and the core network device 30, the access network device 20 between the terminal device 10 and the core network device 30 to which the terminal device 10 accesses will transparently transmit the transmitted information.

[0116] Figure 2 A flowchart of a method for using slice information provided by an embodiment of the present application is shown. Figure 2 This method is applied to Figure 1 The method is illustrated by taking a terminal device in the communication system shown in FIG. 1 as an example. The method comprises:

[0117] Step 201: When the AS layer of the terminal obtains the slice information of the terminal, the use of the slice information is restricted.

[0118] The AS layer of the terminal is used to implement the relevant functions of the wireless communication interface corresponding to the terminal, such as: wireless bearer management (including wireless bearer allocation, establishment, modification and release), wireless channel processing (including channel coding and modulation), encryption (encryption for the AS layer itself) and mobility management (such as cell selection, cell switching and cell reselection, etc.).

[0119] The slice information of the terminal refers to at least one of the network slice information obtained by the terminal, supported by the terminal, requested, configured, allowed, interested in, and required by the terminal. Alternatively, the slice information of the terminal refers to the information of the network slices supported by the network where the terminal is located. Schematically, the slice information includes at least one of the slice identifier corresponding to the network slice, the slice priority information corresponding to the network slice, the frequency point information corresponding to the network slice, and the frequency point priority information corresponding to the network slice.

[0120] The slicing information is determined by the terminal, or the slicing information is indicated by the network device for the terminal. For example, the AS layer of the terminal receives the slicing information sent by the NAS layer of the terminal. Alternatively, the AS layer of the terminal receives the slicing information sent by the NAS layer of the terminal according to the instruction of the core network device.

[0121] The terminal restricts the use of slice information, including but not limited to: when the terminal uses the slice information, the slice information is only used for at least one of cell selection, cell reselection, resource selection and access to the network, and / or the slice information is not allowed to be reported to the network device.

[0122] In summary, the method provided in this embodiment, when the AS layer of the terminal obtains the slice information of the terminal, it will limit the use of the slice information. It is only used for at least one of cell selection, cell reselection, resource selection and access to the network, which can ensure that the terminal quickly accesses the corresponding network slice according to the slice information. Slice information is not allowed to be reported to the network device, which can avoid the security risk of possible leakage of slice information in the unencrypted message sent by the terminal to the network device.

[0123] Figure 3 A flowchart of a method for using slice information provided by an exemplary embodiment of the present application is shown. Figure 3 This method is applied to Figure 1 The method is illustrated by taking a terminal device in the communication system shown in FIG. 1 as an example. The method comprises:

[0124] Step 301: The NAS layer of the terminal determines whether to send slice information to the AS layer.

[0125] The NAS layer of the terminal is used to implement functions unrelated to the terminal's access to the network, such as session management (including session establishment, modification, and release), user management (including user data management, attachment, and detachment), security management (including authentication and encryption initialization between the terminal user and the network), and operator billing.

[0126] In one implementation, the NAS layer of the terminal determines whether to send slice information to the AS layer according to a mode indication from a core network device. Optionally, when the mode indication is a first mode indication, the NAS layer of the terminal determines to send slice information to the AS layer. When the mode indication is a second mode indication, the NAS layer of the terminal determines not to send slice information to the AS layer. The first mode indication is sent by the core network device when the terminal meets the second condition. The second mode indication is sent by the core network device when the terminal does not meet the second condition.

[0127] In another implementation, the NAS layer of the terminal determines whether to send slice information to the AS layer based on the second condition.

[0128] When the NAS layer of the terminal determines that the terminal does not meet the second condition, it determines not to send slice information to the AS layer.

[0129] When the NAS layer of the terminal determines that the terminal meets the second condition, it determines to send slice information to the AS layer.

[0130] Optionally, the second condition in the above implementation includes at least one of the following:

[0131] The communication protocol version supported by the terminal is equal to or greater than the specified communication protocol version;

[0132] The terminal is a terminal that supports at least one of cell selection, cell reselection, resource selection, and network access based on slice information;

[0133] The terminal is a terminal having at least one of the capabilities of performing cell selection, cell reselection, resource selection, and network access based on slice information;

[0134] The terminal is a terminal that supports network slicing.

[0135] For example, the specified communication protocol version refers to Release 17. The terminal supports network slicing, which means that the terminal can access the network slice or a specific network slice and use the services carried by the network slice. The specific can also be understood as specified.

[0136] Step 302: When the AS layer of the terminal obtains the slice information of the terminal, the use of the slice information is restricted.

[0137] Limiting the use of slice information means that when the terminal uses the slice information, the slice information is only used for at least one of cell selection, cell reselection, resource selection and access to the network, and / or the slice information is not allowed to be reported to the network device. The slice information is not allowed to be reported to the network device specifically means that after the terminal completes the random access process, the slice information is not allowed to be reported to the network device through the first message. The first message is a message for the terminal to reply to the network device that the establishment or reconstruction of the radio resource control is completed, for example, the first message is a MSG5 message.

[0138] Optionally, the slice information includes at least one of the following:

[0139] Slice identifier corresponding to the network slice, such as NSSAI, S-NSSAI;

[0140] Slice priority information corresponding to the network slice;

[0141] Frequency information corresponding to the network slice;

[0142] Frequency priority information corresponding to the network slice.

[0143] The slice information is determined by the terminal, or the slice information is indicated or configured by the network device accessed by the terminal. The network device accessed by the terminal may be a network device currently accessed or resident by the terminal, or a network device previously accessed or resident by the terminal. Optionally, the NAS layer of the terminal can send the slice information to the AS layer. When the AS layer of the terminal obtains the slice information of the terminal and the first condition is met, the terminal will limit the use of the slice information. Optionally, the first condition includes at least one of the following: the communication protocol version supported by the terminal is equal to or greater than the specified communication protocol version, the terminal is a terminal that supports network slicing, the terminal is a terminal that supports at least one of cell selection, cell reselection, resource selection and access to the network based on slice information, the terminal is a terminal with the ability to perform at least one of cell selection, cell reselection, resource selection and access to the network based on slices, and the terminal receives a restriction indication sent by a network device.

[0144] In a specific example, Figure 4 FIG. 1 is a schematic diagram of an implementation process of the AS layer of a terminal obtaining slice information provided by an exemplary embodiment of the present application. Figure 4 As shown, the NAS layer 4011 of the terminal sends the slice information to the AS layer 4012 of the terminal. The source of the slice information is at least one of the source determined by the terminal and the source indicated by the network device.

[0145] For example, the slice information is the frequency point information corresponding to the network slice, and the slice information is indicated or configured by the network device. The slice information is the frequency point priority information corresponding to the network slice, and the slice information is indicated or configured by the network device. The slice information is a slice identifier, and the slice information is requested by the terminal, allowed by the terminal, configured by the terminal, intended by the terminal, or of interest to the terminal. The slice information is a slice identifier, and can also be a slice identifier supported by the network. The slice priority information of the network slice can be configured or indicated by the network, or determined by the terminal.

[0146] When the terminal meets the first condition, the AS layer 4012 of the terminal will limit the use of slice information. The first condition includes that the communication protocol version of the terminal is equal to or greater than the specified communication protocol version (for example, R17), the terminal is a terminal that supports at least one of cell selection, cell reselection, resource selection and access to the network based on slice information, the terminal is a terminal with the ability to perform at least one of cell selection, cell reselection, resource selection and access to the network based on slices, the terminal is a terminal that supports network slicing, and the terminal receives at least one of the restriction indications sent by the network device (for example, the terminal obtains the restriction indication through the NAS layer or the broadcast of the network device). Restricting the use of slice information means that when the AS layer 4012 of the terminal obtains the slice information and uses the slice information, the slice information is only used for the terminal to perform at least one of cell selection, cell reselection, resource selection and access to the network, and / or the terminal will not report the slice information to the network. The resource selection includes: when the terminal performs service transmission, it will select a suitable random access resource to access the network according to the slice information. For example, the terminal selects the RACH resource corresponding to the network slice according to the slice information, accesses the channel, and establishes an RRC connection with the network. The terminal will not report the slice information to the network, which means that the terminal will not carry the slice information when transmitting messages with the network device through the air interface, such as the RRC message or MSG5 message or connection establishment completion message reported by the terminal to the network device.

[0147] Before the NAS layer 4011 of the terminal sends slice information to the AS layer 4012 of the terminal, the logic of determining whether to send the slice information will be executed. The NAS layer 4011 of the terminal determines whether to send slice information to the AS layer 4012 of the terminal according to the mode indication from the core network device (transmitted through the new base station 402, the new base station 402 refers to the base station where the terminal is currently located). Among them, when the core network device determines that the terminal meets the second condition, it will instruct the NAS layer 4011 of the terminal to send slice information to the AS layer 4012 of the terminal. For example, the core network device instructs the NAS layer 4011 of the terminal to send slice information to the AS layer 4012 of the terminal through a NAS message (such as a registration message). Alternatively, the NAS layer 4011 of the terminal determines whether to send slice information to the AS layer 4012 of the terminal according to the second condition. The second condition is at least one of the following: the communication protocol version supported by the terminal is equal to or greater than the specified communication protocol version (for example, R17), and the terminal supports network slicing.

[0148] In summary, the method provided in this embodiment, when the AS layer of the terminal obtains the slice information of the terminal, it will limit the use of the slice information. It is only used for at least one of cell selection, cell reselection, resource selection and access to the network, which can ensure that the terminal quickly accesses the corresponding network slice according to the slice information. Slice information is not allowed to be reported to the network device, which can avoid the security risk of possible leakage of slice information in the unencrypted message sent by the terminal to the network device.

[0149] In addition, the network slice accessed by the terminal can enhance the performance of the network service required by the terminal. A network slice dedicated to improving the performance of network services is provided.

[0150] Figure 5 A flowchart of a method for using slice information provided by an exemplary embodiment of the present application is shown. Figure 5 This method is applied to Figure 1 The method is illustrated by taking a terminal device in the communication system shown in FIG. 1 as an example. The method comprises:

[0151] Step 501: When the first frequency priority information and the second frequency priority information of the network slice are different, use the second frequency priority information, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information.

[0152] Among them, the first frequency priority information is the frequency priority information saved by the terminal for the network slice, that is, the frequency priority information corresponding to the network slice saved by the terminal itself, or the frequency priority information corresponding to the network slice written in the NAS layer, or the frequency priority information corresponding to the network slice previously obtained through the network device accessed or resident. Specifically, the terminal can obtain the frequency priority information corresponding to the network slice when accessing the network (such as through dedicated information such as RRC message, NAS message); or, the terminal can obtain the frequency priority information corresponding to the network slice through system information. The second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice, that is, the frequency priority information for the network slice indicated by the network side. The frequency priority information for the network slice indicated by the network device accessed or resident by the terminal, or the frequency priority information of the corresponding network slice supported or configured by the network device indicated by the network device accessed or resident by the terminal. The first frequency priority information and the second frequency priority information correspond to the same network slice.

[0153] Optionally, the AS layer of the terminal obtains the first frequency priority information through system information, a dedicated RRC message or a NAS layer. The first frequency priority information obtained by the AS layer of the terminal through the NAS layer is obtained by the NAS layer from the core network device, or is written or stored in the NAS layer. The terminal obtains the second frequency priority information according to the slice information indicated or configured by the network device, and the slice information includes the second frequency priority information. For example, the terminal receives a dedicated RRC message sent by the access network device, and the dedicated RRC message carries the slice information. Alternatively, the terminal receives a broadcast message sent by the access network device, and the broadcast message carries the slice information. Alternatively, the terminal receives a NAS message sent by the core network device, and the NAS message carries the slice information. Optionally, the system information includes at least one of: SIB2 (System Information Block 2), SIB3, SIB4 and SIB5.

[0154] When the terminal selects or reselects a cell, the frequency priority set for the same network slice between the original access network device accessed / residenced by the terminal and the new access network device currently accessed / residenced will change, that is, the first frequency priority information and the second frequency priority information will be different. At this time, the terminal uses the second frequency priority information, ignores the first frequency priority information, or updates the first frequency priority information according to the second frequency priority information. Further, in the first case, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information. It is possible to optimize the performance of the terminal accessing the network according to the second frequency priority information. The first situation includes: the T320 timer of the terminal has not timed out. The first timer of the terminal has not timed out, and the first frequency priority information is valid before the first timer times out. The terminal has not initiated the RRC connection establishment process. And the terminal is in at least one of the non-connected states.

[0155] In summary, the method provided in this embodiment adjusts the frequency priority information of the network slice according to the second frequency priority information when the first frequency priority information and the second frequency priority information of the network slice are different. This can solve the problem of inaccurate frequency priority confirmation caused by different frequency priority information of the same network slice supported by different cells when switching cells. This avoids determining the frequency priority based only on timer information.

[0156] Figure 6 A flowchart of a method for using slice information provided by an exemplary embodiment of the present application is shown. Figure 6 This method is applied to Figure 1 The method is illustrated by taking a terminal device in the communication system shown in FIG. 1 as an example. The method comprises:

[0157] Step 601: The AS layer of the terminal obtains the first frequency priority information of the network slice.

[0158] The first frequency priority information is the frequency priority information saved by the terminal for the network slice, that is, the frequency priority information corresponding to the network slice saved by the terminal itself, or the frequency priority information corresponding to the network slice written in the NAS layer, or the frequency priority information corresponding to the network slice previously obtained through the accessed or resident network device.

[0159] Optionally, the AS layer of the terminal obtains the first frequency priority information through system information. Alternatively, the AS layer of the terminal obtains the first frequency priority information through a dedicated RRC message. Alternatively, the AS layer of the terminal obtains the first frequency priority information from the NAS layer, and the first frequency priority information is obtained by the NAS layer from the core network device.

[0160] Step 602: The AS layer of the terminal obtains the second frequency priority information of the network slice.

[0161] The second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice. That is, the frequency priority information of the network slice of the network device indicated or configured by the network device accessed or resident by the terminal. The network slice of the network device can be a network slice supported or configured for it. The first frequency priority information and the second frequency priority information correspond to the same network slice.

[0162] The terminal receives slice information indicated or configured by the network device, and the slice information includes the second frequency priority information. Optionally, the terminal receives a dedicated RRC message sent by the access network device, and the dedicated RRC message carries the slice information. Alternatively, the terminal receives a broadcast message sent by the access network device, and the broadcast message carries the slice information. Alternatively, the terminal receives a NAS message sent by the core network device, and the NAS message carries the slice information.

[0163] Step 603: When the first frequency priority information and the second frequency priority information of the network slice are different, use the second frequency priority information, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information.

[0164] Optionally, in a first case, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information. The first case includes at least one of the following:

[0165] The T320 timer has not timed out;

[0166] Optionally, the duration of the T30 timer may be a finite value or an infinite value.

[0167] The first timer has not timed out; before the first timer times out, the first frequency priority information is valid;

[0168] The first timer may be a T320 timer, or a timer having a function similar to that of the T320 timer.

[0169] Optionally, the first timer may be run for a specific network slice or a network slice group, or for all network slices. The specific may also be understood as specified.

[0170] Optionally, the duration of the first timer for a specific network slice or network slice group may be the same or different.

[0171] Optionally, the duration of the first timer may be a finite value or an infinite value.

[0172] The terminal does not initiate the RRC connection establishment process;

[0173] The terminal is in disconnected state.

[0174] When the terminal receives information for cell reselection, such as an RRCrelease message, the T320 timer is started. When the T320 timer is running (not timed out), in the relevant technology, the information used for cell reselection is considered valid. When the T320 timer times out, the information used for cell reselection becomes invalid. However, here, since the information for network slices, such as the first frequency priority information (i.e., the saved slice information) and the second frequency priority information may be different, even if the timer has not timed out and / or the terminal is still in a non-connected state, the information for cell reselection for the network slice may not be valid at this time. Therefore, when the two are different, even if the timer has not timed out and / or the terminal is still in a non-connected state, it is necessary to use the second frequency priority information, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information.

[0175] Further, when the first slice information saved by the terminal for the network slice (the first slice information of the network slice saved by the terminal itself) is different from the second slice information indicated or configured by the network side for the network slice (the second slice information of the network slice of the network device indicated or configured by the network device accessed or resident by the terminal), the terminal will use the second slice information, or ignore the first slice information, or update the first slice information according to the second slice information. The first slice information and the second slice information correspond to the same network slice.

[0176] Optionally, the first slice information includes at least one of the following:

[0177] The slice identifier corresponding to the network slice;

[0178] Slice priority information corresponding to the network slice;

[0179] Frequency information corresponding to the network slice;

[0180] Frequency priority information corresponding to the network slice.

[0181] Optionally, the second slice information includes at least one of the following:

[0182] The slice identifier corresponding to the network slice;

[0183] Slice priority information corresponding to the network slice;

[0184] Frequency information corresponding to the network slice;

[0185] Frequency priority information corresponding to the network slice.

[0186] Optionally, the terminal will limit the use of the acquired slice information, including but not limited to: when the terminal uses the slice information, the slice information is only used for at least one of cell selection, cell reselection, resource selection and access to the network, and / or the slice information is not allowed to be reported to the network device.

[0187] For example, Figure 7 FIG. 1 is a schematic diagram of an implementation process of a terminal acquiring first frequency priority information and second frequency priority information provided by an exemplary embodiment of the present application. Figure 7 As shown, the terminal 401 obtains the first frequency priority information and the second frequency priority information through the network device. The AS layer of the terminal 401 obtains the first frequency priority information through the dedicated RRC message (ie, RRCrelease message) sent by the original base station 403. The terminal 401 receives a broadcast message sent by the new base station 402, which carries slice information, and the slice information includes the second frequency priority information. Among them, the original base station 403 is the base station connected to the terminal 401 before accessing the new base station 402. That is, when the terminal 401 accesses a new base station, it will obtain the frequency priority information of the network slice under the current base station. When the slice information obtained by the terminal 401 includes the frequency priority information corresponding to the network slice, the terminal 401 will also obtain the frequency priority information when obtaining the slice information. Optionally, the terminal 401 can also obtain the first frequency priority according to the system information. Optionally, the system information includes: at least one of SIB2 (System Information Block 2), SIB3, SIB4 and SIB5.

[0188] When the first frequency priority information of the network slice saved by the terminal 401 (obtained from the original base station 403) is different from the second frequency priority information of the network slice obtained from the new base station 402. In the first case, the terminal 401 will use the second frequency priority information and ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information. When the terminal 401 accesses different cells and the frequency priority information of the network slices where the terminal 401 is located supported by different cells is different, the frequency priority information of the network slice where the terminal 401 is located can be optimized according to the current cell. The first situation includes: the T320 timer of the terminal has not timed out. The first timer has not timed out, and the first frequency priority information is valid before the first timer times out. The terminal 401 has not initiated the RRC connection establishment process. And the terminal 401 is in at least one of the non-connected states.

[0189] In summary, the method provided in this embodiment adjusts the frequency priority information of the network slice according to the second frequency priority information when the first frequency priority information and the second frequency priority information of the network slice are different. This can solve the problem of inaccurate frequency priority confirmation caused by different frequency priority information of the same network slice supported by different cells when switching cells. This avoids determining the frequency priority based only on timer information.

[0190] The above-mentioned embodiments may be implemented individually or in combination.

[0191] Figure 8 A block diagram of a device for using slice information provided by an embodiment of the present application is shown, and the device includes an AS layer.

[0192] like Figure 8 As shown, the device 80 includes:

[0193] The restriction module 801 is used to restrict the use of slice information when the AS layer of the device obtains the slice information of the device.

[0194] Optionally, restricting the use of slice information includes:

[0195] The slice information is only used for at least one of cell selection, cell reselection, resource selection and access network. And / or, the slice information is not allowed to be reported to the network device.

[0196] Optionally, after the device completes the random access process, it is not allowed to report slice information to the network device through the first message, and the first message is used by the device to reply to the network device with a message that the wireless resource control establishment or reconstruction is completed.

[0197] Optionally, the restriction module 801 is used to:

[0198] When the AS layer of the device obtains the slice information of the device and the first condition is met, the use of the slice information is restricted.

[0199] Optionally, the first condition includes at least one of the following:

[0200] The communication protocol version supported by the device is equal to or greater than the specified communication protocol version; the device is a device that supports at least one of cell selection, cell reselection, resource selection and access to the network based on slice information; the device is a device that has the ability to perform at least one of cell selection, cell reselection, resource selection and access to the network based on slice information; the device is a device that supports network slicing; and a restriction indication sent by a network device is received.

[0201] Optionally, the slice information includes at least one of the following:

[0202] Slice identifier corresponding to the network slice; slice priority information corresponding to the network slice; frequency information corresponding to the network slice; frequency priority information corresponding to the network slice.

[0203] Optionally, the slice information is determined by the device. Or, the slice information is indicated or configured by the network device.

[0204] Optionally, the device further comprises a NAS layer. Fig. 9 As shown, the device 80 also includes:

[0205] The sending module 802 is used for the NAS layer of the device to send slice information to the AS layer.

[0206] Alternatively, if Fig.10 As shown, the device 80 also includes:

[0207] The first determination module 803 is used for the NAS layer of the device to determine whether to send slice information to the AS layer according to the mode indication from the core network device.

[0208] Optionally, the first determining module 803 is configured to:

[0209] When the mode indication is the first mode indication, it is determined to send slice information to the AS layer. When the mode indication is the second mode indication, it is determined not to send slice information to the AS layer. The first mode indication is sent by the core network device when the device meets the second condition, and the second mode indication is sent by the core network device when the device does not meet the second condition.

[0210] Alternatively, if Fig.11 As shown, the device 80 also includes:

[0211] The second determination module 804 is used for the NAS layer of the device to determine whether to send slice information to the AS layer according to the second condition.

[0212] Optionally, the second determining module 804 is configured to:

[0213] When the NAS layer of the device determines that the device does not meet the second condition, it determines not to send the slice information to the AS layer. When the NAS layer of the device determines that the device meets the second condition, it determines to send the slice information to the AS layer.

[0214] Optionally, the second condition includes at least one of the following:

[0215] The communication protocol version supported by the device is equal to or greater than the specified communication protocol version;

[0216] The device is a device that supports at least one of cell selection, cell reselection, resource selection, and network access based on slice information;

[0217] The device is a device having the capability of performing at least one of cell selection, cell reselection, resource selection, and network access based on slice information;

[0218] The device is a device that supports network slicing.

[0219] Fig.12 A block diagram of a device for using slice information provided by an embodiment of the present application is shown. Fig.12 As shown, the device 120 includes:

[0220] Processing module 1201 is used to use the second frequency priority information when the first frequency priority information and the second frequency priority information of the network slice are different, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information.

[0221] Among them, the first frequency priority information is the frequency priority information saved by the device for the network slice, and the second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice.

[0222] Optionally, the processing module 1201 is configured to:

[0223] In the first case, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information. The first case includes at least one of the following:

[0224] The T320 timer has not timed out; the first timer has not timed out, and before the first timer times out, the first frequency priority information is valid; the device has not initiated the RRC connection establishment process; the device is in a non-connected state.

[0225] Alternatively, if Fig.13 As shown, the device 120 also includes an acquisition module. The acquisition module 1202 is used to:

[0226] The AS layer of the device obtains the first frequency priority information through system information.

[0227] or,

[0228] The AS layer of the device obtains the first frequency priority information through a dedicated RRC message.

[0229] or,

[0230] The AS layer of the device obtains the first frequency priority information from the NAS layer, and the first frequency priority information is obtained by the NAS layer from the core network device.

[0231] Alternatively, if Fig.14 As shown, the device 120 also includes:

[0232] The receiving module 1203 is used for the device to receive the slice information indicated or configured by the network device, and the slice information includes the second frequency priority information.

[0233] Optionally, the slice information further includes at least one of the following:

[0234] Slice identifier corresponding to the network slice; slice priority information corresponding to the network slice; frequency information corresponding to the network slice; frequency priority information corresponding to the network slice.

[0235] Optionally, the receiving module 1203 is configured to:

[0236] The device receives a dedicated RRC message sent by an access network device, and the dedicated RRC message carries slice information.

[0237] or,

[0238] The device receives a broadcast message sent by an access network device, and the broadcast message carries slice information.

[0239] or,

[0240] The device receives a NAS message sent by a core network device, and the NAS message carries slice information.

[0241] One point that needs to be explained is that the device provided in the above embodiment only uses the division of the above-mentioned functional modules as an example to implement its functions. In actual applications, the above-mentioned functions can be assigned to different functional modules according to actual needs, that is, the content structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0242] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0243] Fig.15 A schematic diagram of the structure of a terminal provided by an exemplary embodiment of the present application is shown. The terminal 150 includes: a processor 1501, a receiver 1502, a transmitter 1503, a memory 1504 and a bus 1505.

[0244] The processor 1501 includes one or more processing cores. The processor 1501 executes various functional applications and information processing by running software programs and modules.

[0245] The receiver 1502 and the transmitter 1503 may be implemented as a communication component, which may be a communication chip.

[0246] The memory 1504 is connected to the processor 1501 via a bus 1505 .

[0247] The memory 1504 may be used to store at least one instruction, and the processor 1501 may be used to execute the at least one instruction to implement each step in the above method embodiment.

[0248] In addition, the memory 1504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof. The volatile or non-volatile storage device includes but is not limited to: a magnetic disk or an optical disk, an electrically erasable programmable read-only memory (EEPROM), an erasable programmable read-only memory (EPROM), a static random access memory (SRAM), a read-only memory (ROM), a magnetic memory, a flash memory, and a programmable read-only memory (PROM).

[0249] In an exemplary embodiment, a computer-readable storage medium is also provided, in which at least one instruction, at least one program, a code set or an instruction set is stored. The at least one instruction, the at least one program, the code set or the instruction set is loaded and executed by the processor to implement the method for using slice information executed by the terminal provided in the above-mentioned various method embodiments.

[0250] An embodiment of the present application also provides a chip, which includes a programmable logic circuit and / or program instructions. When the chip runs on a terminal, it is used to implement the method for using slice information executed by the terminal as described above.

[0251] The present application also provides a computer program product, which, when executed on a terminal device, enables the terminal device to execute the method for using the above-mentioned slice information.

[0252] Those skilled in the art should be aware that in one or more of the above examples, the functions described in the embodiments of the present application can be implemented with 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. Computer-readable media include computer storage media and communication media, wherein the communication media include any media that facilitates the transmission of a computer program from one place to another. The storage medium can be any available medium that a general or special-purpose computer can access.

[0253] The above description is only an exemplary embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for using slice information, characterized in that: Applied in a terminal, the method includes: When the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information; Among them, the first frequency priority information and the second frequency priority information correspond to the same network slice, the first frequency priority information is the frequency priority information obtained by the AS layer of the terminal through system information and saved for the network slice, the second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice, and the second frequency priority information is included in the slice information carried by the dedicated RRC message sent by the network device.

2. The method according to claim 1, characterized in that The method further comprises: In a first case, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information; the first case includes at least one of the following: T320 timer has not timed out; The first timer has not timed out, and before the first timer times out, the first frequency priority information is valid; The terminal does not initiate an RRC connection establishment process; The terminal is in a disconnected state.

3. The method according to claim 1, characterized in that The method further comprises: The terminal receives the slice information indicated or configured by the network device through the dedicated RRC message, where the slice information includes the second frequency priority information.

4. The method according to claim 3, characterized in that The slice information also includes at least one of the following: The slice identifier corresponding to the network slice; Slice priority information corresponding to the network slice; Frequency information corresponding to the network slice; The frequency priority information corresponding to the network slice.

5. A method for using slice information, characterized in that: Applied in a network device, the method comprises: Indicating or configuring slice information of the terminal to the terminal through a dedicated RRC message, where the slice information includes second frequency priority information of the network slice; Among them, when the first frequency priority information and the second frequency priority information of the network slice are different, the second frequency priority information is used by the terminal, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information, the first frequency priority information and the second frequency priority information correspond to the same network slice, and the first frequency priority information is the frequency priority information obtained by the AS layer of the terminal through system information and saved for the network slice.

6. The method according to claim 5, characterized in that In a first case, when the first frequency priority information and the second frequency priority information are different, the second frequency priority information is used by the terminal, or the first frequency priority information is ignored, or the first frequency priority information is updated according to the second frequency priority information; the first case includes at least one of the following: T320 timer has not timed out; The first timer has not timed out, and before the first timer times out, the first frequency priority information is valid; The terminal does not initiate an RRC connection establishment process; The terminal is in a disconnected state.

7. The method according to claim 5, characterized in that The slice information also includes at least one of the following: The slice identifier corresponding to the network slice; Slice priority information corresponding to the network slice; Frequency information corresponding to the network slice; The frequency priority information corresponding to the network slice.

8. The method according to claim 5, characterized in that The slice information is only used for at least one of cell selection, cell reselection, resource selection and network access; and / or, The slice information is not allowed to be reported to the network device.

9. A device for using slice information, characterized in that: The device comprises: a processing module, configured to use the second frequency priority information, or ignore the first frequency priority information, or update the first frequency priority information according to the second frequency priority information, when the first frequency priority information and the second frequency priority information of the network slice are different; Among them, the first frequency priority information and the second frequency priority information correspond to the same network slice, the first frequency priority information is the frequency priority information obtained by the AS layer of the terminal through system information and saved for the network slice, the second frequency priority information is the frequency priority information indicated or configured by the network side for the network slice, and the second frequency priority information is included in the slice information carried by the dedicated RRC message sent by the network device.

10. A terminal, characterized in that: The terminal comprises: processor; a transceiver connected to the processor; a memory for storing executable instructions for the processor; The processor is configured to load and execute the executable instructions to implement the method for using slice information as described in any one of claims 1 to 4.

11. A computer-readable storage medium, characterized in that: The readable storage medium stores executable instructions, and the executable instructions are loaded and executed by a processor to implement the method for using slice information as described in any one of claims 1 to 4.

12. A chip, characterized in that: The chip includes a programmable logic circuit and / or program instructions, and when the chip runs on a terminal, it is used to implement the method for using the slice information as described in any one of claims 1 to 4.

13. A computer program product, characterized in that The computer program product stores executable instructions, which are loaded and executed by a processor to implement the method for using slice information as described in any one of claims 1 to 4.

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