Cell reselection method, device, equipment and storage medium based on slicing

Abstract

This application is a divisional application of 202180082175.X. The present application provides a cell reselection method, apparatus, device and storage medium based on slicing, in which a network device transmits slice-related information associated with a serving cell frequency and / or slice information associated with at least one neighboring frequency to a terminal device, and the terminal device determines the final target reselected cell based on the slice-related information associated with the serving cell frequency and / or slice information associated with at least one neighboring frequency. During the cell reselection process in this solution, the terminal device can reselect the cell based on the preference and demand for the slice, avoiding reselection due to slicing problems, reducing the service delay of the terminal device, and improving the user experience.

Description

[0001] This application is a divisional application with application number 202180082175.X, application date May 8, 2021, and invention name “Slice-based cell reselection method, device, equipment and storage medium”. Technical Field

[0002] Embodiments of the present application relate to communication technology, and in particular, to a slice-based cell reselection method, apparatus, device and storage medium. Background Art

[0003] At present, with people's pursuit of speed, latency, high-speed mobility, energy efficiency and the diversity and complexity of business in future life, the 3rd Generation Partnership Project (3GPP) international standard organization has begun to develop the fifth generation of mobile communications (Fifth Generation, referred to as 5G). The main application scenarios of 5G are: Enhanced Mobile Broadband (eMBB), Ultra Reliable Low Latency Communications (URLLC), and massive Machine Type Communications (mMTC).

[0004] In the specific implementation of any of the above application scenarios, the terminal device can select or reselect a cell according to location movement or service requirements, and the network device can also configure the frequency priority information while configuring the frequency. In the prior art, when the terminal device is selecting / reselecting a cell, if the cell selected by the terminal device meets the suitable cell criterion (S criterion), the terminal can choose to reside in the cell to complete the cell selection. If the reselected target cell meets the suitable cell criterion and meets the reselection criterion conditions defined based on the absolute frequency priority, the terminal reselects to the cell that meets the aforementioned conditions and completes the cell reselection.

[0005] However, the existing cell reselection method does not take into account the slice information that the terminal device cares about. The terminal device cannot guarantee that the reselected cell supports the slice information that the terminal device cares about. In order to initiate the slice service that the terminal device cares about, it may need to rely on re-initiating the cell reselection process or the redirection process of the network device, resulting in additional service delays, which is not conducive to the terminal device experience. Summary of the invention

[0006] The embodiments of the present application provide a cell reselection method, apparatus, device and storage medium based on slices, which are used to solve the problem in the prior art that cell reselection or redirection of network devices, etc., which causes increased service delays due to failure to consider the slice information concerned by the terminal device during cell reselection.

[0007] In a first aspect, an embodiment of the present application may provide a slice-based cell reselection method, applied to a terminal device, the method comprising:

[0008] Receive slice-related information associated with a serving cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point sent by a network device;

[0009] The target reselected cell is determined based on the slice related information associated with the serving cell frequency and / or the slice related information associated with at least one neighboring cell frequency.

[0010] In a second aspect, an embodiment of the present application may provide a slice-based cell reselection method, applied to a network device, the method comprising:

[0011] Send slice-related information associated with the service cell frequency of the terminal device and / or slice-related information associated with at least one neighboring cell frequency to the terminal device.

[0012] In a third aspect, an embodiment of the present application may provide a slice-based cell reselection device, including:

[0013] A receiving module, used to receive slice-related information associated with a serving cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point sent by a network device;

[0014] A processing module is used to determine the target reselection cell based on the slice-related information associated with the service cell frequency point and / or the slice-related information associated with at least one neighboring cell frequency point.

[0015] In a fourth aspect, an embodiment of the present application may provide a slice-based cell reselection device, including:

[0016] The sending module is used to send slice-related information associated with the service cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point to the terminal device.

[0017] In a fifth aspect, an embodiment of the present application may provide a terminal device, including:

[0018] Processor, memory, and interactive interface;

[0019] The memory stores computer-executable instructions;

[0020] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the slice-based cell reselection method described in the first aspect.

[0021] In a sixth aspect, an embodiment of the present application may provide a network device, including:

[0022] Processor, memory, and interactive interface;

[0023] The memory stores computer-executable instructions;

[0024] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the slice-based cell reselection method described in the second aspect.

[0025] In the seventh aspect, an embodiment of the present application may provide a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the slice-based cell reselection method described in the first aspect.

[0026] In an eighth aspect, an embodiment of the present application may provide a computer-readable storage medium, wherein the computer-readable storage medium stores computer execution instructions, which, when executed by a processor, are used to implement the slice-based cell reselection method described in the second aspect.

[0027] In the ninth aspect, an embodiment of the present application may provide a chip, comprising: a processing module and a communication interface, wherein the processing module is used to execute the slice-based cell reselection method described in the first aspect.

[0028] In the tenth aspect, an embodiment of the present application may provide a chip, comprising: a processing module and a communication interface, wherein the processing module is used to execute the slice-based cell reselection method described in the second aspect.

[0029] In the eleventh aspect, an embodiment of the present application may provide a computer program product, including a computer program, which, when executed by a processor, implements the slice-based cell reselection method described in the first aspect.

[0030] In the twelfth aspect, an embodiment of the present application may provide a computer program product, including a computer program, which, when executed by a processor, implements the slice-based cell reselection method described in the second aspect.

[0031] The embodiments of the present application provide a slice-based cell reselection method, apparatus, device and storage medium. In the method, a network device transmits slice-related information associated with a service cell frequency and / or slice information associated with at least one neighboring frequency to a terminal device. The terminal device determines the final target reselected cell based on the slice-related information associated with the service cell frequency and / or slice information associated with at least one neighboring frequency. During the cell reselection process in this solution, the terminal device can reselect the cell based on the preference and demand for the slice, avoiding reselection due to slice problems, reducing the service delay of the terminal device, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0033] Figure 1 A schematic diagram of an application scenario of a slice-based cell reselection method provided in this application;

[0034] Figure 2 A flowchart of a first embodiment of a slice-based cell reselection method provided in the present application;

[0035] Figure 3 A flowchart of an example of a slice-based cell reselection method provided in this application;

[0036] Figure 4 A flowchart of another example of a slice-based cell reselection method provided in the present application;

[0037] Figure 5 A schematic diagram of the structure of a first embodiment of a slice-based cell reselection device provided in the present application;

[0038] Figure 6 A schematic diagram of the structure of Embodiment 2 of the slice-based cell reselection device provided in the present application;

[0039] Figure 7 A schematic diagram of the structure of a terminal device embodiment provided by the present application;

[0040] Figure 8 A schematic diagram of the structure of a network device embodiment provided in this application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0042] The terms "first", "second", etc. in the specification, claims, and above-mentioned drawings of the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product, or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products, or devices.

[0043] In the current existing technologies, the main application scenarios of the fifth generation of mobile communications (Fifth Generation, referred to as 5G) are: Enhanced Mobile Broadband (Enhanced Mobile Broadband, referred to as eMBB), Ultra Reliable Low Latency Communications (Ultra Reliable Low Latency Communications, referred to as URLLC), and massive Machine Type Communications (MMTC).

[0044] eMBB still aims at users to obtain multimedia content, services and data, and its demand is growing rapidly. On the other hand, since eMBB may be deployed in different scenarios, such as indoors, in urban areas, and in rural areas, its capabilities and requirements vary greatly, so it cannot be generalized and must be analyzed in detail in combination with specific deployment scenarios. Typical applications of URLLC include: industrial automation, power automation, remote medical operations (surgery), traffic safety, etc. Typical features of mMTC include: high connection density, small data volume, latency-insensitive services, low cost and long service life of modules, etc.

[0045] In order to reduce air interface signaling and quickly restore wireless connections and data services in the 5G network environment, a new Radio Resource Control (RRC) state is defined, namely the RRC_INACTIVE state. This state is different from the RRC_IDLE and RRC_CONNECTED states.

[0046] Idle state (RRC_IDLE): Mobility is based on cell selection and reselection of the user equipment (UE). Paging is initiated by the CN and the paging area is configured by the CN. There is no UE AS context on the base station side. There is no RRC connection.

[0047] Connected state (RRC_CONNECTED): There is an RRC connection, and the base station and the UE have a UE AS context. The network knows the location of the UE at the specific cell level. The mobility is controlled by the network. Unicast data can be transmitted between the UE and the base station.

[0048] Inactive state (RRC_INACTIVE): Mobility is based on UE cell selection and reselection, there is a connection between CN-NG-RAN, the UE AS context exists on a base station, paging is triggered by the Radio Access Network (RAN), and the RAN-based paging area is managed by the RAN. The network side knows the UE's location based on the RAN paging area level.

[0049] Frequency priority

[0050] When configuring a frequency, a network device can also configure the frequency priority information at the same time. The frequency priority can also be called the absolute frequency priority. The absolute frequency priority value is 0, 1, 2, 3, 4, 5, 6 or 7. 0 represents the lowest priority and 7 represents the highest priority. In order to diversify the frequency priority configuration, the standard stipulates that each value from 0 to 7 can be associated with a decimal value. The decimal value range is {0.2, 0.4, 0.6, 0.8}. There are a total of 40 absolute frequency priority combinations with integer and decimal places.

[0051] Absolute frequency priority can be configured through system information or dedicated signaling. The frequency priority configured by dedicated signaling will be associated with a valid duration. During the valid duration, the dedicated frequency priority always overrides the public frequency priority broadcast by the system information; when the valid duration expires, the terminal device can only use the public frequency priority.

[0052] Cell selection / reselection rules for terminal equipment

[0053] Community selection:

[0054] If the cell selected by the terminal device meets the suitable cell criterion (S criterion), the terminal device can choose to reside in the cell to complete the cell selection.

[0055] Cell reselection:

[0056] If the target cell for reselection meets the suitable cell criteria and the reselection criteria defined based on the absolute frequency priority, the terminal device reselects to the cell that meets the aforementioned conditions and completes the cell reselection;

[0057] The above reselection criteria defined based on absolute frequency priority (also called absolute frequency cell reselection evaluation criteria) include the following three:

[0058] - High priority frequency cell reselection criteria;

[0059] - The same priority frequency cell reselection criterion or the same frequency reselection criterion, also known as the R criterion;

[0060] -Reselection criteria for low priority frequency cells.

[0061] Introduction to Slice Concept

[0062] Network slicing is a service-oriented resource encapsulation concept. A network slice is uniquely identified by a Network Slice Selection Assistant Identity (NSSAI), and also corresponds to a type of resource configuration. Different core networks can support different types of network slices according to demand. Unlike the Long Term Evolution (LTE) system registration, a terminal device needs to register a slice before using it in the network. The terminal device can only initiate the session establishment process corresponding to the slice after the slice is successfully registered. During the slice registration process, the NSSAI information (Request NSSAI) requested by the terminal device for registration is carried to the access network side through message 5, and the terminal is restricted to registering up to 8 S-NSSAI (Single NSSAI) information at a time; the core network generates the Allowed NSSAI and Rejected NSSAI of the terminal device based on the contract information of the terminal device, the Request NSSAI of the terminal device, the locally supported slice information, and the local policy.

[0063] The terminal device will also pre-configure or obtain the Configured NSSAI from the core network. This configuration is unique to the Public Land Mobile Network (PLMN). If a PLMN configured by the terminal device does not have the Configured NSSAI configured, the Default NSSAI information is used.

[0064] The core network of the New Radio (NR) system is defined as follows: one slice corresponds to one S-NSSAI identifier. An S-NSSAI identifier consists of a slice type identifier (Slice / Service Type, SST) and a slice differentiator (SD). The slice type identifier SST occupies 8 bits and must appear, and the slice differentiator SD occupies 24 bits and is optional.

[0065] In the current NR system, the cell reselection method does not take into account the slice confidence that the terminal device cares about. The terminal device cannot guarantee that the reselected cell supports the slice information that the terminal device cares about. In order to initiate the slice service that the terminal device cares about, it may need to rely on re-initiating the cell reselection process or the redirection process of the network device, resulting in additional service delays, which is not conducive to the terminal device experience.

[0066] In response to the above-mentioned problems, the present application provides a cell reselection method based on slices. In this scheme, when a terminal device performs cell reselection, it first obtains slice-related information associated with the serving cell frequency and / or slice-related information associated with at least one neighboring cell frequency, and then reselects the cell based on the slice-related information to avoid the need to perform the cell reselection process again due to failure to consider the slices, thereby reducing the service delay of the terminal device.

[0067] Figure 1 A schematic diagram of an application scenario of the slice-based cell reselection method provided in this application, such as Figure 1 As shown, the solution is mainly used in any terminal device. The network device can be used to send some configuration information, or slice-related information, or indicate whether the terminal device adopts a slice-based cell reselection solution.

[0068] Specifically, the solution may involve two execution entities, namely, network equipment and terminal equipment. The network equipment is a device that communicates with a UE terminal device (or also called a communication terminal or terminal), and may be an access network device or a core network device.

[0069] The network device can provide communication coverage for a specific geographical area and can communicate with terminal devices located in the coverage area. Optionally, the network device can be a base station (Base Transceiver Station, BTS) in a Global System for Mobile Communications (Global System for Mobile Communications, referred to as: GSM) system or a Code Division Multiple Access (Code Division Multiple Access, referred to as: CDMA) system, or a base station (NodeB, NB) in a WCDMA system, or an evolutionary base station (Evolutional Node B, eNB or eNodeB) in a Long Term Evolution (Long Term Evolution, referred to as: LTE) system, or a wireless controller in a Cloud Radio Access Network (Cloud Radio Access Network, CRAN), or the network device can be a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a bridge, a router, a network side device in a 5G network, or a network device in a future evolved Public Land Mobile Network (Public Land Mobile Network, PLMN), or a base station providing satellite services, etc.

[0070] Terminal equipment includes, but is not limited to, connection via a wired line, such as via a Public Switched Telephone Networks (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection; and / or another data connection / network; and / or via a wireless interface, such as for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter; and / or another device configured to receive / send communication signals; and / or an Internet of Things (IoT) device. Terminal equipment configured to communicate via a wireless interface may be referred to as a "wireless communication terminal", "wireless terminal" or "mobile terminal". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; Personal Communications System (PCS) terminals that may combine cellular radiotelephones with data processing, fax, and data communications capabilities; PDAs that may include radiotelephones, pagers, Internet / intranet access, Web browsers, notepads, calendars, and / or Global Positioning System (GPS) receivers; and conventional laptop and / or palmtop receivers or other electronic devices that include radiotelephone transceivers. Access terminals, subscriber units, subscriber stations, mobile stations, mobile stations, remote stations, remote terminals, mobile devices, user terminals, terminals, wireless communication devices, user agents, or user devices may be referred to. The access terminal can be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network, or a terminal device in a future evolved PLMN, etc.

[0071] Based on the above Figure 1 In the scenario shown, the slice-based cell reselection method provided by the present application is described in detail through several specific embodiments below.

[0072] Figure 2 This is a flowchart of Embodiment 1 of the slice-based cell reselection method provided in the present application, as shown in FIG. Figure 2 As shown, the cell reselection method based on slicing specifically includes the following steps:

[0073] S101: Receive information related to a slice associated with a serving cell frequency and / or information related to a slice associated with at least one neighboring cell frequency sent by a network device.

[0074] In this step, the terminal device can obtain slice-related information associated with the current service cell frequency and / or slice-related information associated with at least one neighboring cell frequency from the network device.

[0075] In a specific implementation, the terminal device can obtain slice-related information associated with the service cell frequency and / or slice-related information associated with at least one neighboring cell frequency from the network device through a system broadcast message or dedicated signaling.

[0076] Specifically, for any one of the service cell frequency or at least one neighboring cell frequency, the slice-related information associated with the frequency includes at least slice identification information, and the slice identification information specifically includes at least one slice identification.

[0077] Optionally, in a specific implementation, for any one of the service cell frequency or at least one neighboring cell frequency, the slice-related information associated with the frequency also includes slice priority information associated with at least one slice identifier.

[0078] Optionally, in another specific implementation, the slice priority information is configured according to frequency granularity or physical cell identity (Physical Cell Identity, PCI for short) granularity.

[0079] In a specific implementation, the slice priority information may include the slice priorities corresponding to one or more slice identifiers in the slice identification information. There may be slice priority information including the slice priorities corresponding to all slice identifiers, or there may be slice priority information including only the slice priorities corresponding to one or several slice identifiers in the slice identification information, and this solution does not limit this.

[0080] During the cell reselection process of the terminal device, if it is found that one or more slice identifiers in the slice related information associated with any frequency point are not configured with slice priority information, the slice priority corresponding to the one or more slice identifiers not configured with slice priority information can be set to the highest level or the lowest level.

[0081] S102: Determine a target reselected cell based on slice-related information associated with a serving cell frequency and / or slice-related information associated with at least one neighboring cell frequency.

[0082] In this step, after obtaining the slice-related information associated with the relevant frequency point, the terminal device can perform cell reselection based on the slice-related information associated with the service cell frequency point and / or the slice-related information associated with at least one neighboring cell frequency point, and finally determine the target reselected cell.

[0083] There are many ways for the terminal device to reselect a cell based on slice related information. The following is an example of a specific reselection method:

[0084] First method

[0085] In the first round of reselection evaluation, the terminal device can perform cell reselection evaluation on at least one neighboring cell that supports the target slice identifier to be evaluated, in descending order of the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell, to determine the only target reselection cell.

[0086] If a unique target reselection cell is determined based on the absolute frequency priority corresponding to the neighboring cell frequency, the cell reselection process ends, otherwise a second round of reselection evaluation is performed.

[0087] In the second round of reselection evaluation, if a unique target reselection cell is not determined based on the absolute frequency priority corresponding to the neighboring cell frequency (that is, the first round of reselection evaluation process cannot uniquely determine a target reselection cell), then for at least two neighboring cells with the same absolute frequency priority corresponding to the neighboring cell frequency, cell reselection evaluation is performed in descending order according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency to determine a unique target reselection cell.

[0088] If a unique target reselection cell is determined based on the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point, the cell reselection process is terminated, otherwise a third round of reselection evaluation is performed.

[0089] In the third round of reselection evaluation, if a unique target reselection cell is not determined based on the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency (i.e., the second round of reselection evaluation process cannot uniquely determine a target reselection cell), then for at least two neighboring cells whose absolute frequency priorities correspond to the neighboring cell frequencies and whose target slice identifiers associated with the neighboring cell frequencies are also the same, a cell reselection evaluation is performed based on the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells to determine a unique target reselection cell.

[0090] If only one target reselection cell is selected according to the absolute frequency cell reselection evaluation criteria, the cell reselection process ends. If two or more cells are selected according to this rule, another round of reselection evaluation is required.

[0091] In the fourth round of reselection evaluation, if the number of cells that meet the absolute frequency cell reselection evaluation criteria is greater than one (that is, there are still at least two cells that meet the absolute frequency cell reselection evaluation criteria), the cells are ranked according to the equal priority frequency cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and the cell with the highest ranking is used as the target reselection cell.

[0092] Second method

[0093] In the first round of reselection evaluation, the terminal device performs cell reselection evaluation on at least one neighboring cell that supports the target slice identifier to be evaluated, in descending order according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point of each neighboring cell, to determine the only target reselection cell.

[0094] If a unique target reselection cell is determined based on the slice priority corresponding to the target slice identifier associated with the neighboring frequency point, the cell reselection process ends, otherwise the second round of reselection evaluation process begins.

[0095] In the second round of reselection evaluation, if a unique target reselection cell is not determined based on the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point (that is, the first round of reselection evaluation process cannot uniquely determine a target reselection cell), then for at least two neighboring cells with the same priority corresponding to the target slice identifier associated with the neighboring cell frequency point, cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency point of each neighboring cell to determine a unique target reselection cell.

[0096] If the only target reselection cell is determined based on the absolute frequency priority corresponding to the neighboring cell frequency, the cell reselection process ends. Otherwise, the third round of reselection evaluation process begins.

[0097] In the third round of reselection evaluation, if a unique target reselection cell is not determined based on the absolute frequency priority corresponding to the neighboring cell frequency (i.e., the second round of reselection evaluation process cannot uniquely determine a target reselection cell), then for at least two neighboring cells having the same slice priority corresponding to the target slice identifier associated with the neighboring cell frequency and the same absolute frequency priority corresponding to the neighboring cell frequency, a cell reselection evaluation is performed based on the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells to determine a unique target reselection cell.

[0098] If there is only one cell that meets the absolute frequency cell reselection evaluation criteria, that is, the target reselection cell is uniquely determined, the cell reselection process ends; otherwise, the next round of reselection evaluation process needs to be performed.

[0099] In the fourth round of reselection evaluation, if the number of cells that meet the absolute frequency cell reselection evaluation criteria is greater than one (that is, there are still at least two cells that meet the absolute frequency cell reselection evaluation criteria), the cells are ranked according to the equal priority frequency cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and the cell with the highest ranking is used as the target reselection cell.

[0100] The third way

[0101] The terminal device assigns an absolute frequency priority corresponding to the neighboring cell frequency point for at least one neighboring cell supporting the target slice identifier to be evaluated according to the relative high and low situation of the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point of each neighboring cell. Cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency point of each neighboring cell after the assignment to determine the only target reselection cell.

[0102] If a unique target reselection cell is determined based on the absolute frequency priority corresponding to the assigned neighboring frequency point, the cell reselection evaluation process ends, otherwise the cell reselection needs to be performed based on the reselection criteria defined based on the absolute frequency priority. This can be specifically implemented as follows:

[0103] If a unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, a cell reselection evaluation is performed on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine a unique target reselection cell;

[0104] If the number of cells satisfying the absolute frequency cell reselection evaluation criteria is greater than one, the cells are ranked according to the equal priority frequency cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and the highest ranked cell is used as the target reselection cell.

[0105] In the process of cell reselection using the third method, it should be understood that the essence of this solution is to select cells based on the slice priority corresponding to the target slice identifier corresponding to each frequency point. However, in the implementation process, before using the absolute frequency point priority for cell selection, the relative high and low conditions of the slice priority corresponding to the target slice identifier on each neighboring frequency point are used to re-assign the absolute frequency point priority corresponding to each neighboring frequency point, and each neighboring frequency point obtains a new absolute frequency point priority.

[0106] In the specific implementation of this solution, for the assignment of absolute frequency priority corresponding to each neighboring frequency point, the original absolute frequency priority of the frequency point can be directly replaced by the slice priority corresponding to the target slice identifier on the frequency point, or it can be sorted or the relative priority can be determined according to the slice priority corresponding to the target slice identifier on the frequency point. This solution does not impose any restrictions on this.

[0107] It should be understood that in any of the above methods, the absolute frequency cell reselection evaluation criterion includes at least one of the following:

[0108] High priority frequency cell reselection evaluation criteria;

[0109] Low priority frequency cell reselection evaluation criteria;

[0110] The reselection evaluation criteria for cells at the same frequency or frequency point with the same priority level are also called the R criteria.

[0111] The above-mentioned cell reselection schemes are all cell reselections based on slice-related information, and the target slice identifier needs to be applied in each method. For the terminal device, it is necessary to determine the target slice identifier before specifically applying it to the target slice identifier.

[0112] In a specific implementation of this solution, the terminal device can obtain the target slice identifier from the access stratum (Access Stratum, abbreviated as: AS, also called AS layer), and the target slice identifier is directly obtained by the AS layer from the upper layer, or is selected by the AS layer from multiple slice identifiers provided by the upper layer.

[0113] Optionally, the upper layer may be a non-access stratum (NAS), also called a NAS layer.

[0114] Specifically, if the target slice identifier is one of the slice identifiers selected by the AS layer from multiple slice identifiers provided by the upper layer, the terminal device also needs to obtain the slice priority information corresponding to the multiple slice identifiers from the upper layer, and then determine the target slice identifier based on the slice priority information corresponding to the multiple slice identifiers.

[0115] The slicing-based cell reselection method provided in this embodiment obtains the slice-related information corresponding to each cell frequency through the network device, and then reselects the cell based on the slice-related information. That is, the terminal device can reselect the cell based on the preference and demand for the slice, avoiding reselection due to slicing problems, reducing the service delay of the terminal device, and improving the user experience.

[0116] On the basis of the foregoing embodiment, for the terminal device, whether to adopt the slice-based cell reselection method when performing cell reselection needs to be determined in advance. Specifically, the terminal device can determine whether to adopt the slice-based cell reselection method in at least one of the following ways:

[0117] The first way, Figure 3 This is a flowchart of an example of a slice-based cell reselection method provided in this application, such as Figure 3 As shown, the slice-based cell reselection method also includes the following steps:

[0118] S201: The network device sends first indication information to the terminal device.

[0119] S202: Based on the first indication information sent by the network device, determine whether to apply the slice-based cell reselection method.

[0120] In this scheme, the network device sends a first indication message to the terminal device, the terminal device receives the first indication message sent by the network device, and then determines whether to apply a slice-based cell reselection method based on the first indication message sent by the network device. The first indication message is used to indicate whether to apply a slice-based cell reselection method.

[0121] The first indication information is a switch configuration information, that is, directly indicating whether to apply the slice-based cell reselection method or not to apply the slice-based cell reselection method.

[0122] Alternatively, the first indication information is used to indicate whether to apply any one of the slice-based cell reselection methods. If the first indication information indicates that the terminal device applies a specific slice-based cell reselection method, the terminal device applies the corresponding slice-based cell reselection method; otherwise, when the first indication information does not appear or the value of the first indication information does not point to any valid slice-based cell reselection method, the terminal device does not apply the slice-based cell reselection method.

[0123] The network device may configure the first indication information to the terminal device via a system broadcast message or dedicated signaling, and this solution does not impose any restrictions on this.

[0124] Optionally, when the first indication information is carried by a system broadcast message, the system broadcast message may be any one of SIB1, SIB2, SIB3, SIB4, and SIB5.

[0125] In the second method, the terminal device can determine whether to apply the slice-based cell reselection method based on its own capability information, and the capability information is used to indicate whether to apply the slice-based cell reselection method.

[0126] The third method is to determine whether to apply the slice-based cell reselection method based on a pre-configured agreement. In this solution, the terminal device can determine whether to apply or not apply the slice-based cell reselection method according to the agreement in the protocol or factory settings.

[0127] In the specific implementation of any of the foregoing embodiments, if the terminal device wants to reselect a cell based on a slice, it is necessary to measure the serving cell and / or at least one neighboring cell to obtain measurement results before reselecting the cell based on slice-related information.

[0128] Generally speaking, the terminal device needs to measure each cell only after the cell measurement conditions are met. In order to apply the slice-based cell reselection scheme, this solution sets a preset event that does not meet the measurement conditions but can trigger the cell measurement process.

[0129] That is, for the terminal device, a neighboring frequency point measurement process that does not meet the measurement conditions but supports the target slice identification can be started according to a preset event; wherein the preset event includes at least one of the following:

[0130] (1) Determine to apply the slice-based cell reselection method (i.e., although the measurement conditions are not met, the terminal device has determined to adopt the slice-based cell reselection method, and can actively perform cell measurement);

[0131] (2) The terminal device resides in a new cell;

[0132] (3) The target slice identifier is supported on the neighboring cell frequency point;

[0133] (4) The current serving cell measurement result is less than or equal to a first threshold, where the first threshold is obtained through a system broadcast message or dedicated signaling;

[0134] (5) The target reselection cell cannot be determined from the neighboring cells to be evaluated with the existing measurement results, and there are neighboring cell frequencies that do not meet the measurement start condition but support the target slice identifier.

[0135] Among the above-mentioned five preset events, when one or more than one event occurs, the cell measurement may be performed when the measurement condition is not met.

[0136] Optionally, the above events may be used in combination, for example, event (3) and event (4) are used in combination, or event (4) and event (5) are used in combination. This application does not limit this method of combining events.

[0137] It should be understood that events (1) to (4) are all preconditions, that is, before the cell reselection process, if these events occur, cell measurements are performed to obtain measurement results. Then the cell is reselected based on the slice-related information and the measurement results. Event (5) is different and is a postcondition, that is, during the cell reselection process, if it is found that the target reselection cell cannot be determined from the neighboring cells to be evaluated with existing measurement results, and there are other neighboring cell frequencies that can support the target slice identification, then cell measurements can be performed on these neighboring cells, and cell reselection can be further performed based on the measurement results.

[0138] In a specific implementation of this solution, whether to use the aforementioned preset event to trigger the cell measurement can be configured by the network device. For example: Figure 4 A flowchart of another example of a slice-based cell reselection method provided in the present application, such as Figure 4 As shown, the slice-based cell reselection method also includes the following steps:

[0139] S301: The network device sends second indication information to the terminal device.

[0140] S302: The terminal device determines, according to the second indication information, whether to apply a neighboring cell frequency point measurement process that does not meet the measurement conditions but supports the target slice identifier and is initiated according to a preset event.

[0141] In this scheme, the terminal device receives the second indication information sent by the network device, and the second indication information is used to indicate whether the terminal device applies a method for starting a neighboring frequency point measurement process that does not meet the measurement conditions but supports the target slice identifier according to a preset event.

[0142] It should be understood that in the specific implementation of this solution, the second indication information is configured through a system broadcast message or dedicated signaling.

[0143] To summarize, the slice-based cell reselection method provided by the present application requires that the terminal device needs to determine the target slice identifier when performing cell reselection, obtain the associated slice-related information from the network device, and then perform a cell reselection evaluation based on the measurement results of the cell, slice-related information and the target slice identifier, and finally determine the target reselected cell. This effectively avoids the problem that the cell selected by the terminal device does not support the service of the slice it cares about due to not considering the slice information, and also avoids re-initiating the cell reselection or redirection process, thereby reducing service latency and improving user experience.

[0144] Based on the above embodiments, the following processes involved in this solution are described in detail through specific embodiments:

[0145] 1. The terminal device determines the target slice identifier;

[0146] 2. Slice related information associated with the serving cell frequency and / or at least one neighboring cell frequency;

[0147] 3. Specific cell reselection plan;

[0148] 4. Determine whether to apply the slice-based cell reselection method;

[0149] 5. Start the neighboring cell frequency point measurement process that does not meet the measurement start condition but supports the target slice identification according to the preset event.

[0150] 1. The terminal device determines the target slice identifier

[0151] The target slice identifier is directly obtained by the AS layer of the terminal device from the upper layer, or the target slice identifier is selected by the AS layer of the terminal device from multiple slice identifiers provided by the upper layer.

[0152] Mode 1: The target slice identifier is directly obtained by the AS layer of the terminal device from the upper layer. In this mode, the AS layer of the terminal device directly obtains the target slice identifier from the upper layer.

[0153] Method 2: The target slice identifier is selected by the AS layer of the terminal device from multiple slice identifiers provided by the upper layer.

[0154] In one implementation of method 2, the multiple slice identifiers obtained by the AS layer of the terminal device from the upper layer have no associated slice priority information. At this time, the terminal device randomly selects one from the multiple slice identifiers provided by the upper layer as the target slice identifier based on the implementation.

[0155] In another implementation of the second method, the multiple slice identifiers obtained by the AS layer of the terminal device from the upper layer are associated with the slice priority information, as shown in Table 1:

[0156] Table 1 Multiple slice identifiers obtained by the AS layer of the terminal device from the upper layer are associated with slice priority information

[0157]

[0158] As shown in Table 1, when the upper layer provides slice identification information, it also provides slice priority information associated with the slice identification information. The slice priority information associated with each slice identification information may be the same or different. It is allowed that some slice identification information provided by the upper layer has no associated slice priority information. At this time, the slice priority information of these slice identifications that have no associated slice priority information is considered to be the highest or lowest.

[0159] The terminal device selects one slice identifier from multiple slice identifiers provided by the upper layer as the target slice identifier based on the slice priority information.

[0160] Exemplarily, the aforementioned upper layer may be a NAS layer.

[0161] In this application, the meaning of slice identifier is: a slice identifier can be a slice group identifier representing a group of S-NSSAI / NSSAI, or the SST part of the standard S-NSSAI identifier, or the SD part of the standard S-NSSAI identifier, or an identifier based on the standard S-NSSAI / NSSAI identifier after algorithm mapping.

[0162] 2. Information about slices associated with the serving cell frequency and / or at least one neighboring cell frequency

[0163] When the terminal device performs cell reselection, the frequency point of at least one neighboring area supporting the target slice identifier to be evaluated can be processed as a target frequency point set, and the slice-related information supported by each frequency point in the target frequency point set includes at least slice identifier information, and the slice identifier information includes at least one slice identifier.

[0164] Optionally, the slice-related information supported by each frequency point in the target frequency point set also includes slice priority information associated with the at least one slice identifier. In this case, the slice priority information may be configured at a frequency point granularity or at a PCI granularity.

[0165] Table 2 Slice priority information is configured according to frequency granularity

[0166]

[0167] As described in Table 2, each neighboring frequency point is associated with 3 slice identifiers as an example for explanation. This application does not limit the number of slice identifiers actually associated with each neighboring frequency point. At this time, the slice priority of the same slice identifier under the same neighboring frequency point is unique, so it is considered that the slice priority information is configured according to the frequency point granularity.

[0168] Table 3 Slice priority information is configured according to PCI granularity

[0169]

[0170]

[0171] As described in Table 3, taking the example of associating 3 PCIs with each neighboring frequency point, the present application does not limit the number of PCIs actually associated with each neighboring frequency point. One PCI is associated with one slice-related information, and the slice-related information includes one or more slice identifiers and slice priority information associated with one or more slice identifiers, and each slice identifier is associated with one slice priority information. At this time, the slice priority of the same slice identifier in any PCI at the same neighboring frequency point is unique, but the slice priority between different PCIs with the same slice identifier at the same neighboring frequency point is not necessarily unique, so it is considered that the slice priority information is configured according to the PCI granularity.

[0172] Note 1: Both Table 2 and Table 3 allow some slice identifiers associated with neighboring frequency points to not be configured with corresponding associated slice priority information. At this time, the slice priority corresponding to some slice identifiers for which priority information is not configured can be determined as the highest level or the lowest level.

[0173] Note 2: The slice-related information supported by each frequency point in the target frequency point set is obtained from the network device through a system broadcast message or dedicated signaling.

[0174] Note 3: The process of obtaining the slice-related information corresponding to the serving cell frequency is similar to that in Table 2 or Table 3 and will not be repeated here.

[0175] 3. Specific cell reselection plan

[0176] According to the first embodiment, there are at least three ways for a terminal device to perform cell reselection based on slices, and each of the three ways is described below with examples.

[0177] Mode 1 corresponds to a special case of the first mode in Embodiment 1. When the slice related information associated with each frequency point includes only slice identification information, the following assumptions are given:

[0178] The target slice identifier of the terminal device is slice identifier 1;

[0179] The serving cell frequency is F1, the absolute frequency priority is 4, and the supported slices are {slice ID 1, slice ID 2, slice ID 3};

[0180] Neighboring cell frequency F2, absolute frequency priority 6, supported slices {slice ID 1, slice ID 2, slice ID 3};

[0181] Neighboring cell frequency F3, absolute frequency priority 6, supported slices {slice ID 2, slice ID 3};

[0182] Neighboring frequency F4, absolute frequency priority 2, supported slices {slice ID 1, slice ID 2, slice ID 3};

[0183] The neighboring cell frequency is F5, the absolute frequency priority is 5, and the supported slices are {slice ID 1, slice ID 2, slice ID 3}.

[0184] Cell reselection evaluation preparation stage: When the neighboring frequency point measurement process that does not meet the measurement start conditions but supports the target slice identifier is not considered to be started according to a preset event, since F1 is the service frequency point (measured regularly), F2, F3 and F5 are high priority frequencies (measured regularly), according to the requirements of the existing technology, the cell reselection evaluation preparation stage can only measure the measurement results of the cells deployed on F1~F3 and F5, and the neighboring frequency point F4 is a low priority frequency point and is not measured.

[0185] The first round of reselection evaluation: cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell. After the first round of reselection evaluation, cells on F2 and F3 are evaluated first. Since the only target reselection cell cannot be determined, a second round of reselection evaluation is required.

[0186] Second round of reselection evaluation: If the first round of reselection evaluation process cannot uniquely determine a target reselection cell, then for at least two neighboring cells with the same absolute frequency priority corresponding to the neighboring cell frequencies, cell reselection evaluation is performed in descending order according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency to determine the only target reselection cell. Since F3 does not support the target slice identifier (slice identifier 1), the cell measured on F3 is excluded, and the remaining cells on F2 are prioritized for evaluation. Since the absolute frequency priority corresponding to F2 is high priority, it needs to be evaluated according to the high priority frequency cell reselection evaluation criteria. When the cell meets the high priority frequency cell reselection evaluation criteria, the cell is determined as the target reselection cell; otherwise, the cell on F2 is excluded.

[0187] After the cell on F2 is excluded, the process should return to the first round of reselection evaluation, and then evaluate the cell on F5, and so on, until the only target reselection cell is determined and the cell reselection is completed.

[0188] Mode 2, corresponding to the first mode in Embodiment 1, when the slice related information associated with each frequency point includes slice identification information and slice priority information associated with at least one slice identification, the following assumptions are given:

[0189] The target slice identifier of the terminal device is slice identifier 1;

[0190] The serving cell frequency is F1, the absolute frequency priority is 4, and the supported slice related information is {{slice ID 1, slice priority 3}, {slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0191] Neighboring cell frequency F2, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 3}, {slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0192] Neighboring cell frequency F3, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 2}, {slice ID 2, slice priority 3}, {slice ID 3, slice priority 4}};

[0193] Neighboring cell frequency F4, absolute frequency priority 6, supported slice related information is {{slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0194] The neighboring cell frequency F5, the absolute frequency priority is 2, and the supported slice-related information is {{slice identifier 1, slice priority 4}, {slice identifier 2, slice priority 5}, {slice identifier 3, slice priority 6}}.

[0195] Cell reselection evaluation preparation stage: When the neighboring frequency point measurement process that does not meet the measurement start condition but supports the target slice identification is not considered to be started according to the preset event, since F1 is the service frequency point (measured according to the rules), F2 to F4 are high priority frequencies (measured according to the rules), according to the requirements of the existing technology, only the measurement results of the cells deployed on F1 to F4 can be measured in the cell reselection evaluation. F5 is a low priority frequency point and is not measured.

[0196] The first round of reselection evaluation: cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell. After the first round of reselection evaluation, cells on F2 to F4 are evaluated first. Since the only target reselection cell cannot be determined, a second round of reselection evaluation is required.

[0197] The second round of reselection evaluation: If the first round of reselection evaluation does not determine a unique target reselection cell, then for at least two neighboring cells with the same absolute frequency priority corresponding to the neighboring cell frequency points, the cell reselection evaluation is performed in descending order according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency points. In this evaluation process: if the cell corresponding to the frequency point supports the target slice identifier and the slice priority corresponding to the target slice identifier on the frequency point supporting the target slice identifier is the highest, then the reselection evaluation is given priority. Since the slice priority corresponding to the target slice identifier on F3 is not the highest, and the target slice identifier (slice identifier 1) is not supported on F4, the cells measured on F3 and F4 are excluded in this round, and the cells on F2 are evaluated first. If a unique target reselection cell can be determined, the cell reselection process is terminated. If a unique target reselection cell cannot be determined on F2, a third round of reselection evaluation is required.

[0198] The third round of reselection evaluation: For at least two neighboring cells whose absolute frequency priority corresponding to the neighboring cell frequency points is the same and whose target slice identifiers associated with the neighboring cell frequency points also have the same priority, a cell reselection evaluation is performed according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells. In this process, since the absolute frequency priority corresponding to F2 is a high priority, it is necessary to perform an evaluation according to the high priority frequency cell reselection evaluation criteria. When the cell meets the high priority frequency cell reselection evaluation criteria, the cell is determined as the target reselection cell; otherwise, the cell on F2 is excluded.

[0199] If the number of cells that meet the high-priority frequency cell reselection evaluation criteria is still two or more at the F2 frequency, a fourth round of reselection evaluation is required.

[0200] The fourth round of reselection evaluation: the cells on the F2 frequency point are ranked according to the equal priority frequency point cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and the cell with the highest ranking is determined as the target reselection cell.

[0201] After the second round of reselection evaluation in this example, only the cell measured on the neighboring frequency point F2 is left. If F2 is also excluded in the third round of reselection evaluation, the second round of reselection evaluation is performed again, and the cell measured on the second neighboring frequency point F3 with a priority corresponding to the target slice identifier is reselected and evaluated, and subsequent steps are repeated, and so on, until the only target reselection cell is selected and the cell reselection is completed.

[0202] In the cell reselection process shown in Method 2, the overall idea is: first, reselect the target cell according to the absolute frequency priority of the neighboring cell, and then further evaluate the cell reselection according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency, and finally use the absolute frequency cell reselection evaluation criteria to further evaluate the cell reselection, which belongs to the first method in Example 1.

[0203] Mode 3, corresponding to the second mode in Embodiment 1, when the slice related information associated with each frequency point includes slice identification information and slice priority information associated with at least one slice identification, the following assumptions are given:

[0204] The target slice identifier of the terminal device is slice identifier 1;

[0205] The serving cell frequency is F1, the absolute frequency priority is 4, and the supported slice related information is {{slice ID 1, slice priority 3}, {slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0206] Neighboring cell frequency F2, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 4}, {slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0207] Neighboring cell frequency F3, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 2}, {slice ID 2, slice priority 3}, {slice ID 3, slice priority 4}};

[0208] Neighboring cell frequency F4, absolute frequency priority 6, supported slice related information is {{slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0209] The neighboring cell frequency is F5, the absolute frequency priority is 3, and the supported slice-related information is {{slice identifier 1, slice priority 4}, {slice identifier 2, slice priority 5}, {slice identifier 3, slice priority 6}}.

[0210] Cell reselection preparation process: When considering starting the neighboring frequency measurement process that does not meet the measurement start conditions but supports the target slice identifier according to a preset event, since F1 is the service frequency (measured regularly), F2 to F4 are high priority frequencies (measured regularly), although F5 is a low priority frequency, it supports the target slice identifier and can trigger the measurement according to the preset event. According to the requirements of the existing technology, the measurement results of the cells deployed on F1 to F5 can be measured in the cell reselection evaluation.

[0211] The first round of reselection evaluation: Perform cell reselection evaluation in descending order according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point of each neighboring cell to determine the only target reselection cell. For at least one neighboring cell that supports the target slice identifier, determine the reselected cell after evaluating in descending order the slice priority. After the first round of evaluation, the neighboring cell frequencies F2 and F5 are left for further evaluation. Specifically, since F4 does not support the target slice identifier, although F3 supports the target slice identifier, the slice priority corresponding to its target slice identifier is lower than the slice priority in the serving cell, so the frequencies F3-F4 are excluded. After the first round of reselection evaluation, the cells on the frequencies F2 and F5 are evaluated first. Since the only target reselection cell cannot be determined, a second round of reselection evaluation is required.

[0212] Second round of reselection evaluation: For at least two neighboring cells with the same priority corresponding to the target slice identifier associated with the neighboring cell frequency point, cell reselection evaluation is performed in descending order according to the absolute frequency point priority corresponding to the neighboring cell frequency point of each neighboring cell, so as to determine the only target reselection cell. Specifically: Since the absolute frequency point priority of 3 on F5 is lower than the absolute frequency point priority of 6 on F2, the cell measured on F5 can be temporarily excluded, and the cell on F2 is evaluated first. If the only target reselection cell can be determined, the cell reselection process is terminated. If the only target reselection cell cannot be determined on F2, a third round of reselection evaluation is required.

[0213] The third round of cell reselection evaluation: perform cell reselection evaluation according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells. In this process, since the absolute frequency priority corresponding to F2 is high priority, it is necessary to evaluate according to the high priority frequency cell reselection evaluation criteria. When the cell meets the high priority frequency cell reselection evaluation criteria, the cell is determined as the target reselection cell; otherwise, the cell on F2 is excluded.

[0214] If the number of cells that meet the high-priority frequency cell reselection evaluation criteria is still two or more at the F2 frequency, a fourth round of reselection evaluation is required.

[0215] The fourth round of reselection evaluation: the cells on the F2 frequency point are ranked according to the equal priority frequency point cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and the cell with the highest ranking is determined as the target reselection cell.

[0216] In this example, after the second round of reselection evaluation, only the cell measured at frequency F2 remains.

[0217] If F2 is also excluded during the third round of reselection evaluation, the second round of reselection evaluation is performed again, and the cell measured on F5 with a lower absolute frequency priority is reselected and evaluated, and the subsequent steps are repeated, and so on, until the only target reselection cell is selected and the cell reselection is completed.

[0218] In the cell reselection process shown in Method 3, the overall idea is: first, perform cell reselection evaluation in sequence according to the slice priority order corresponding to the target slice identifier associated with the neighboring frequency point, and then further perform target cell reselection according to the absolute frequency point priority of the neighboring frequency point, and finally use the absolute frequency point cell reselection evaluation criterion to further perform cell reselection evaluation, which belongs to the second method in Example 1.

[0219] Mode 4, corresponding to the third mode in Embodiment 1, when the slice related information associated with each frequency point includes slice identification information and slice priority information associated with at least one slice identification, the following assumptions are given:

[0220] The target slice identifier of the terminal device is slice identifier 1;

[0221] The serving cell frequency is F1, the absolute frequency priority is 3, and the supported slice related information is {{slice identifier 1, slice priority 3}, {slice identifier 2, slice priority 4}, {slice identifier 3, slice priority 5}};

[0222] Neighboring cell frequency F2, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 4}, {slice ID 2, slice priority 4}, {slice ID 3, slice priority 5}};

[0223] Neighboring cell frequency F3, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 2}, {slice ID 2, slice priority 3}, {slice ID 3, slice priority 4}};

[0224] Neighboring cell frequency F4, absolute frequency priority 6, supported slice related information is {{slice ID 1, slice priority 3}, {slice ID 2, slice priority 5}};

[0225] Cell reselection evaluation preparation stage: When the neighboring area frequency measurement process that does not meet the measurement start conditions but supports the target slice identifier is not considered to be started according to a preset event, since F1 is the service frequency (measured regularly) and F2 to F4 are high priority frequencies (measured regularly), the cell reselection evaluation can measure the measurement results of the cells deployed on F1 to F4. The current absolute frequency priorities of F2-F4 are the same or different, and this solution does not impose any restrictions on this.

[0226] This solution is different from the solutions of the aforementioned examples and can be divided into two steps in terms of implementation steps: assigning an absolute frequency priority according to the slice priority corresponding to the target slice identifier, and reselecting the cell according to the assigned absolute frequency priority.

[0227] Reselection evaluation step 1: For F1-F4 that support the target slice identifier, the absolute frequency priority corresponding to the serving cell frequency and / or the neighboring cell frequency is assigned according to the relative high and low situations of the slice priority corresponding to the target slice identifier associated with the serving cell frequency and / or the neighboring cell frequency.

[0228] The absolute frequency priority of F1-F4 after assignment is as follows:

[0229] The service cell frequency is F1, and the absolute frequency priority is 3.

[0230] Neighboring frequency F2, absolute frequency priority is 4;

[0231] Neighboring frequency F3, absolute frequency priority is 2;

[0232] The neighboring cell frequency is F4, and the absolute frequency priority is 3.

[0233] Alternatively, instead of directly assigning values, the relative high and low absolute frequency priorities after assignment are obtained. After assignment: the absolute frequency priority of the neighboring cell frequency F2 > the absolute frequency priority of the neighboring cell frequency F4 = the absolute frequency priority of the serving cell frequency F1 > the absolute frequency priority of the neighboring cell frequency F3.

[0234] In the second reselection evaluation step, cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell.

[0235] When determining the target reselection cell based on the assigned absolute frequency priority from high to low, at least one round of cell reselection evaluation is required, as follows:

[0236] In the first round of reselection evaluation, the absolute frequency priority of F3 and F4 after being assigned is lower than the absolute frequency priority of F2 after being assigned, so the cells on the frequency points of F3 and F4 are excluded. First, the cell on the frequency point F2 with the highest absolute frequency priority after being assigned is evaluated.

[0237] In this process, since the absolute frequency priority corresponding to F2 is high priority, it is necessary to evaluate according to the high priority frequency cell reselection evaluation criteria. When the cell meets the high priority frequency cell reselection evaluation criteria, the cell is determined as the target reselection cell; otherwise, the cell on F2 is excluded.

[0238] If the number of cells that meet the high-priority frequency cell reselection evaluation criteria determined at the F2 frequency point is still two or more, a second round of reselection evaluation is required.

[0239] Second round of reselection evaluation: Rank the cells on the F2 frequency point according to the equal priority frequency point cell reselection criteria or the same frequency reselection criteria (also called the R criteria), and determine the highest ranked cell as the target reselection cell.

[0240] After the first round of step 2 in this example, the cell measured on the neighboring frequency point F2 is preferentially reselected and evaluated. If the only target reselection cell cannot be determined on F2, the first round of reselection and evaluation process in step 2 can be repeated, and the cell measured on the neighboring frequency point F4 with the second absolute frequency point priority after assignment is reselected and evaluated. The subsequent steps are repeated, and so on, until the only target reselection cell is selected and the cell reselection is completed.

[0241] In the cell reselection process shown in Method 4, the overall idea is: first, the absolute frequency priority of the neighboring frequency is reassigned according to the slice priority that supports the target slice identifier, and after the assignment, the target cell is reselected according to the absolute frequency priority of the neighboring frequency. Finally, the absolute frequency cell reselection evaluation criteria are used to further perform cell reselection evaluation, which belongs to the third method in Example 1.

[0242] 4. Determining whether to apply the slice-based cell reselection method (this process is an optional process)

[0243] For the cell reselection method based on slices provided in any of the above embodiments, the terminal device first needs to determine whether to apply the cell reselection method based on slices. Specifically, the determination may be made in at least one of the following ways:

[0244] Determine whether to apply a slice-based cell reselection method based on first indication information sent by the network device, where the first indication information is used to indicate whether to apply a slice-based cell reselection method;

[0245] Determining whether to apply a slice-based cell reselection method according to capability information of the terminal device, wherein the capability information is used to indicate whether to apply a slice-based cell reselection method;

[0246] Based on the preconfigured agreement, determine whether to apply the slice-based cell reselection method.

[0247] When the terminal device determines whether to apply a slice-based cell reselection method based on the first indication information, the first indication information can be configured through a system broadcast message or dedicated signaling.

[0248] Based on the pre-configuration agreement, it means that the protocol is determined by default, that is, the network device does not need to provide explicit configuration information to the terminal device.

[0249] 5. Starting a neighboring cell frequency point measurement process that does not meet the measurement start condition but supports the target slice identifier according to a preset event (this process is an optional process)

[0250] The terminal device may start a neighboring frequency point measurement process that does not meet the measurement start condition but supports the target slice identifier according to a preset event, where the preset event includes at least one of the following events:

[0251] Determine to apply a slice-based cell reselection method;

[0252] The terminal equipment resides in a new cell;

[0253] The target slice identifier is supported on the neighboring frequency point;

[0254] The current serving cell measurement result is less than or equal to a first threshold, where the first threshold is obtained through a system broadcast message or dedicated signaling;

[0255] The target reselection cell cannot be determined from the neighboring cells to be evaluated with existing measurement results, and there are neighboring cell frequencies that do not meet the measurement start condition but support the target slice identifier;

[0256] In a specific implementation, whether to adopt the neighboring cell measurement when the measurement condition is met according to the preset event trigger can be determined by the indication of the network device. Specifically, the network device can send a second indication information to the terminal device, and the terminal device receives the second indication information sent by the network device, and the second indication information is used to indicate whether the terminal device applies the method of starting the neighboring cell frequency point measurement process that does not meet the measurement start condition but supports the target slice identifier according to the preset event, wherein the second indication information is configured through a system broadcast message or dedicated signaling.

[0257] In summary, the present application provides a slice-based cell reselection method, through which the terminal device can reselect the cell based on its own slice preferences and needs, thereby reducing the terminal service latency and improving the user experience.

[0258] Figure 5 This is a structural diagram of Embodiment 1 of the cell reselection device based on slicing provided in the present application, as shown in FIG. Figure 5 As shown, the slice-based cell reselection device 10 includes:

[0259] A receiving module 11 is used to receive slice-related information associated with a serving cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point sent by a network device;

[0260] The processing module 12 is used to determine the target reselection cell based on the slice-related information associated with the service cell frequency point and / or the slice-related information associated with at least one neighboring cell frequency point.

[0261] The slice-based cell reselection device provided in this embodiment is used to execute the technical solution on the terminal device side in the aforementioned method embodiment. Its implementation principle and technical effect are similar. Slice-related information is considered when performing cell reselection, reducing the service delay of the terminal device and improving user experience.

[0262] In a specific implementation of the slice-based cell reselection device 10, the processing module 12 is specifically used to:

[0263] For at least one neighboring cell supporting the target slice identification to be evaluated, cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell, so as to determine a unique target reselection cell;

[0264] If a unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency, then for at least two neighboring cells with the same absolute frequency priority corresponding to the neighboring cell frequency, cell reselection evaluation is performed in descending order according to the slice priorities corresponding to the target slice identifiers associated with the neighboring cell frequencies, so as to determine a unique target reselection cell;

[0265] If a unique target reselection cell is not determined according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point, then for at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency point and the same priority corresponding to the target slice identifier associated with the neighboring cell frequency point, a cell reselection evaluation is performed according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells to determine a unique target reselection cell;

[0266] If the number of cells satisfying the absolute frequency cell reselection evaluation criterion is greater than one, the cells are ranked according to the R criterion, and the cell with the highest ranking is used as the target reselection cell.

[0267] Optionally, in another specific implementation of the slice-based cell reselection device 10, the processing module 12 is specifically used to:

[0268] For at least one neighboring cell supporting the target slice identifier to be evaluated, cell reselection evaluation is performed in descending order according to the slice priorities corresponding to the target slice identifier associated with the neighboring cell frequency point of each neighboring cell, so as to determine a unique target reselection cell;

[0269] If a unique target reselection cell is not determined according to the slice priority corresponding to the target slice identifier associated with the neighboring cell frequency point, then for at least two neighboring cells with the same priority corresponding to the target slice identifier associated with the neighboring cell frequency point, cell reselection evaluation is performed in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency point of each neighboring cell, so as to determine a unique target reselection cell;

[0270] If a unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency, a cell reselection evaluation is performed for at least two neighboring cells having the same slice priority corresponding to the target slice identifier associated with the neighboring cell frequency and the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine a unique target reselection cell;

[0271] If the number of cells satisfying the absolute frequency cell reselection evaluation criterion is greater than one, the cells are ranked according to the R criterion, and the cell with the highest ranking is used as the target reselection cell.

[0272] Optionally, in another specific implementation of the slice-based cell reselection device 10, the processing module 12 is specifically used to:

[0273] For at least one neighboring area supporting the target slice identifier to be evaluated, assign an absolute frequency priority corresponding to the neighboring area frequency point according to the relative high and low conditions of the slice priority corresponding to the target slice identifier associated with the neighboring area frequency point of each neighboring area;

[0274] Perform cell reselection evaluation in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell;

[0275] If a unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, a cell reselection evaluation is performed on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine a unique target reselection cell;

[0276] If the number of cells satisfying the absolute frequency cell reselection evaluation criterion is greater than one, the cells are ranked according to the R criterion, and the cell with the highest ranking is used as the target reselection cell.

[0277] Based on any of the above embodiments, the processing module 12 is further used for:

[0278] Obtain the target slice identifier, where the target slice identifier is directly obtained by the AS layer from an upper layer or selected from multiple slice identifiers provided by the upper layer.

[0279] Optionally, if the target slice identifier is selected by the AS layer from multiple slice identifiers provided by an upper layer, the processing module 12 is further used to:

[0280] Acquire slice priority information corresponding to the multiple slice identifiers from the upper layer;

[0281] The target slice identifier is determined according to the slice priority information corresponding to the multiple slice identifiers.

[0282] Optionally, the upper layer is a NAS layer.

[0283] Optionally, the slice-related information associated with the serving cell frequency and / or any one of the at least one neighboring cell frequency includes slice identification information, and the slice identification information includes at least one slice identification.

[0284] Optionally, the slice-related information associated with the serving cell frequency and / or any one of the at least one neighboring cell frequency also includes slice priority information associated with the at least one slice identifier.

[0285] Optionally, the slice priority information is configured according to frequency granularity or PCI granularity.

[0286] Optionally, if there is one or more slice identifiers in the slice related information associated with any frequency point that are not configured with slice priority information, the slice priority corresponding to the one or more slice identifiers that are not configured with slice priority information is set to the highest level or the lowest level.

[0287] Optionally, the slice-related information associated with the service cell frequency and / or the slice-related information associated with at least one neighboring cell frequency is obtained through a system broadcast message or dedicated signaling.

[0288] Optionally, the absolute frequency cell reselection evaluation criterion includes at least one of the following:

[0289] High priority frequency cell reselection evaluation criteria;

[0290] Low priority frequency cell reselection evaluation criteria;

[0291] Evaluation criteria for reselection of cells with the same frequency or frequency priority.

[0292] Optionally, the processing module 12 is further used for:

[0293] Determine whether to apply the slice-based cell reselection method.

[0294] Optionally, the processing module 12 determines whether to apply a slice-based cell reselection method, including at least one of the following methods:

[0295] Determine whether to apply a slice-based cell reselection method based on first indication information sent by the network device, where the first indication information is used to indicate whether to apply a slice-based cell reselection method;

[0296] Determining whether to apply a slice-based cell reselection method according to capability information of the slice-based cell reselection device, wherein the capability information is used to indicate whether to apply a slice-based cell reselection method;

[0297] Based on the preconfigured agreement, determine whether to apply the slice-based cell reselection method.

[0298] Optionally, the first indication information is a type of switch configuration information; or,

[0299] The first indication information is used to indicate whether to apply any one of the slice-based cell reselection methods.

[0300] Optionally, the first indication information is configured via a system broadcast message or dedicated signaling.

[0301] Optionally, the processing module 12 is further used for:

[0302] Initiate a neighboring frequency point measurement process that does not meet the measurement condition but supports the target slice identifier according to a preset event; wherein the preset event includes at least one of the following:

[0303] Determine to apply a slice-based cell reselection method;

[0304] The terminal equipment resides in a new cell;

[0305] The target slice identifier is supported on the neighboring frequency point;

[0306] The current serving cell measurement result is less than or equal to a first threshold, where the first threshold is obtained through a system broadcast message or dedicated signaling;

[0307] The target reselected cell cannot be determined from the neighboring cells to be evaluated with existing measurement results, and there are neighboring cell frequencies that do not meet the measurement start conditions but support the target slice identifier.

[0308] Optionally, the receiving module 12 is further used for:

[0309] Receive second indication information sent by the network device, where the second indication information is used to indicate whether the terminal device should apply a method for starting a neighboring frequency point measurement process that does not meet measurement conditions but supports a target slice identifier according to a preset event.

[0310] Optionally, the second indication information is configured via a system broadcast message or dedicated signaling.

[0311] The slice-based cell reselection device provided in the aforementioned embodiment is used to execute the technical solution on the terminal device side in the aforementioned method embodiment. Its implementation principle and technical effect are similar and will not be repeated here.

[0312] Figure 6 This is a structural diagram of Embodiment 2 of the cell reselection device based on slicing provided by the present application, such as Figure 6 As shown, the slice-based cell reselection device 20 includes: a processing module 21 and a sending module 22.

[0313] The processing module 21 is used to obtain relevant information and perform relevant configurations.

[0314] The sending module 22 is used to send slice-related information associated with the service cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point to the terminal device.

[0315] Optionally, the slice-related information associated with the serving cell frequency and / or any one of the at least one neighboring cell frequency includes slice identification information, and the slice identification information includes at least one slice identification.

[0316] Optionally, the slice-related information associated with the serving cell frequency and / or any one of the at least one neighboring cell frequency also includes slice priority information associated with the at least one slice identifier.

[0317] Optionally, the slice priority information is configured according to frequency granularity or PCI granularity.

[0318] Optionally, if there is one or more slice identifiers in the slice related information associated with any frequency point that are not configured with slice priority information, the slice priority corresponding to the one or more slice identifiers that are not configured with slice priority information is set to the highest level or the lowest level.

[0319] Optionally, the slice-related information associated with the serving cell frequency and / or the slice-related information associated with at least one neighboring cell frequency is sent via a system broadcast message or dedicated signaling.

[0320] Optionally, the sending module 22 is further used for:

[0321] Sending first indication information to the terminal device, wherein the first indication information is used to indicate whether the terminal device applies a slice-based cell reselection method.

[0322] Optionally, the first indication information is a type of switch configuration information; or,

[0323] The first indication information is used to indicate whether to apply any one of the slice-based cell reselection methods.

[0324] Optionally, the first indication information is configured via a system broadcast message or dedicated signaling.

[0325] Optionally, the sending module 22 is further used for:

[0326] Sending second indication information to the terminal device, wherein the second indication information is used to indicate whether the terminal device applies a method for starting a neighboring frequency point measurement process that does not meet the measurement conditions but supports the target slice identifier according to a preset event.

[0327] Optionally, the second indication information is configured via a system broadcast message or dedicated signaling.

[0328] The slice-based cell reselection device provided in the aforementioned embodiment is used to execute the technical solution on the network equipment side in the aforementioned method embodiment. Its implementation principle and technical effects are similar and will not be repeated here.

[0329] Figure 7 A schematic diagram of the structure of a terminal device embodiment provided in this application, such as Figure 7 As shown, the terminal device 100 includes:

[0330] Processor 111, memory 112, interactive interface 113;

[0331] The memory 112 stores computer-executable instructions;

[0332] The processor 111 executes the computer-executable instructions stored in the memory 112, so that the processor 111 executes the slice-based cell reselection method in the aforementioned embodiment.

[0333] Figure 8 A schematic diagram of the structure of a network device embodiment provided in this application, such as Figure 8 As shown, the network device 200 includes:

[0334] Processor 211, memory 212, interactive interface 213;

[0335] The memory 212 stores computer-executable instructions;

[0336] The processor 211 executes the computer-executable instructions stored in the memory 212, so that the processor 211 executes the slice-based cell reselection method in the aforementioned embodiment.

[0337] In the aforementioned embodiments, the terminal device or network device is of a simple design. The embodiments of the present application do not limit the number of processors and memories in the device. The aforementioned embodiments only use the number 1 as an example.

[0338] In a specific implementation of the above terminal device or network device, the memory, the processor and the interactive interface may be connected via a bus or in other ways.

[0339] Optionally, the memory may be integrated inside the processor, or may be a memory provided outside the processor.

[0340] In addition, the terminal device or network device provided in this application also includes other components such as communication interfaces, which are not limited in this solution.

[0341] An embodiment of the present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the technical solution on the terminal device side in any of the aforementioned method embodiments.

[0342] An embodiment of the present application further provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the technical solution on the network device side in any of the aforementioned method embodiments.

[0343] Optionally, the processor may be a chip.

[0344] An embodiment of the present application further provides a chip, including: a processing module and a communication interface, wherein the processing module is used to implement the solution of the terminal device in any of the aforementioned method embodiments.

[0345] An embodiment of the present application further provides a chip, including: a processing module and a communication interface, wherein the processing module is used to implement the solution of the network device in any of the aforementioned method embodiments.

[0346] Furthermore, any of the above-mentioned chips also includes a storage module (such as a memory), the storage module is used to store instructions, the processing module is used to execute the instructions stored in the storage module, and the execution of the instructions stored in the storage module enables the processing module to execute the technical solution in any of the above-mentioned method embodiments.

[0347] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the slice-based cell reselection method on the terminal device side in any of the aforementioned method embodiments.

[0348] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the slice-based cell reselection method on the network device side in any of the aforementioned method embodiments.

[0349] An embodiment of the present application also provides a program, which, when executed by a processor, is used to implement the solution on the terminal device side in any of the aforementioned method embodiments.

[0350] The embodiment of the present application also provides a program, which, when executed by a processor, is used to implement the solution on the network device side in any of the aforementioned method embodiments.

[0351] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the modules can be electrical, mechanical or other forms.

[0352] In the specific implementation of any of the above devices, it should be understood that the processor can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the method disclosed in the present application can be directly implemented as a hardware processor, or can be implemented by a combination of hardware and software modules in the processor.

[0353] All or part of the steps of the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a readable memory. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned memory (storage medium) includes: read-only memory (English: read-only memory, abbreviated as: ROM), RAM, flash memory, hard disk, solid state drive, magnetic tape (English: magnetic tape), floppy disk (English: floppy disk), optical disc (English: optical disc) and any combination thereof.

Claims

1. A cell reselection method based on slicing, characterized in that: Applied to a terminal device, the method comprises: Receive slice-related information associated with a serving cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point sent by a network device; Determine a target reselected cell according to the slice related information associated with the serving cell frequency and / or the slice related information associated with the at least one neighboring cell frequency; The determining of the target reselected cell according to the slice related information associated with the serving cell frequency and / or the slice related information associated with the at least one neighboring cell frequency includes: For at least one neighboring area supporting the target slice identifier to be evaluated, assigning an absolute frequency priority corresponding to the neighboring area frequency point according to a relative high or low situation of the slice priority corresponding to the target slice identifier associated with the neighboring area frequency point of each neighboring area; Performing cell reselection evaluation in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell; If the unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, a cell reselection evaluation is performed on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine the unique target reselection cell; If the number of cells satisfying the absolute frequency cell reselection evaluation criteria is greater than one, the cells are ranked according to the same-frequency or same-priority frequency cell reselection evaluation criteria, and the highest ranked cell is used as the target reselection cell; The step of assigning a value to the absolute frequency priority corresponding to the neighboring frequency includes: The original absolute frequency priority of the frequency point is replaced with the slice priority corresponding to the target slice identifier on the frequency point; The absolute frequency cell reselection evaluation criteria include at least one of the following: High priority frequency cell reselection evaluation criteria; Low priority frequency cell reselection evaluation criteria; Evaluation criteria for reselection of cells with the same frequency or frequency priority.

2. The method according to claim 1, characterized in that The method further comprises: Obtain a target slice identifier, where the target slice identifier is directly obtained by the access layer from an upper layer or selected from multiple slice identifiers provided by the upper layer.

3. The method according to claim 2, characterized in that The upper layer is the non-access layer NAS.

4. The method according to any one of claims 1 to 3, characterized in that: The slice related information associated with any frequency point of the serving cell frequency point and / or the at least one neighboring cell frequency point includes slice identification information, and the slice identification information includes at least one slice identification.

5. The method according to claim 4, characterized in that The slice-related information associated with the serving cell frequency and / or any one of the at least one neighboring cell frequency also includes slice priority information associated with the at least one slice identifier.

6. The method according to claim 5, characterized in that The slice priority information is configured according to the frequency granularity or the physical cell identifier PCI granularity.

7. The method according to claim 5 or 6, characterized in that: If there is one or more slice identifiers in the slice related information associated with any frequency point that are not configured with slice priority information, the slice priority corresponding to the one or more slice identifiers that are not configured with slice priority information is set to the highest level or the lowest level.

8. The method according to any one of claims 1 to 3, characterized in that: The slice-related information associated with the service cell frequency and / or the slice-related information associated with at least one neighboring cell frequency are obtained through system broadcast messages or dedicated signaling.

9. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: Determine whether to apply the slice-based cell reselection method based on the capability information of the terminal device, and the capability information is used to indicate whether to apply the slice-based cell reselection method.

10. A cell reselection method based on slicing, characterized in that: Applied to a network device, the method comprises: Sending slice related information associated with the serving cell frequency and / or slice related information associated with at least one neighboring frequency to the terminal device, where the slice related information associated with the serving cell frequency and / or the slice related information associated with at least one neighboring frequency is used to determine the target reselected cell; The target reselection cell is determined by the terminal device through the following steps: For at least one neighboring area supporting the target slice identifier to be evaluated, assigning an absolute frequency priority corresponding to the neighboring area frequency point according to a relative high or low situation of the slice priority corresponding to the target slice identifier associated with the neighboring area frequency point of each neighboring area; Performing cell reselection evaluation in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell; If the unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, a cell reselection evaluation is performed on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine the unique target reselection cell; If the number of cells satisfying the absolute frequency cell reselection evaluation criteria is greater than one, the cells are ranked according to the same-frequency or same-priority frequency cell reselection evaluation criteria, and the highest ranked cell is used as the target reselection cell; The step of assigning a value to the absolute frequency priority corresponding to the neighboring frequency includes: The original absolute frequency priority of the frequency point is replaced with the slice priority corresponding to the target slice identifier on the frequency point; The absolute frequency cell reselection evaluation criteria include at least one of the following: High priority frequency cell reselection evaluation criteria; Low priority frequency cell reselection evaluation criteria; Evaluation criteria for reselection of cells with the same frequency or frequency priority.

11. A cell reselection device based on slicing, characterized in that: include: A receiving module, used to receive slice-related information associated with a serving cell frequency point and / or slice-related information associated with at least one neighboring cell frequency point sent by a network device; A processing module, configured to determine a target reselected cell according to slice related information associated with the serving cell frequency point and / or slice related information associated with at least one neighboring cell frequency point; The processing module is further configured to assign, for at least one neighboring area supporting the target slice identifier to be evaluated, an absolute frequency priority corresponding to the neighboring area frequency point according to a relative high or low situation of a slice priority corresponding to the target slice identifier associated with a neighboring area frequency point of each neighboring area; The processing module is further used to perform cell reselection evaluation in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell; The processing module is further configured to, if the unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, perform cell reselection evaluation on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine the unique target reselection cell; The processing module is further configured to rank the cells according to the same-frequency or same-priority frequency cell reselection evaluation criteria if the number of cells satisfying the absolute frequency cell reselection evaluation criteria is greater than one, and use the highest-ranked cell as the target reselection cell; The processing module is further used to replace the original absolute frequency priority of the frequency with the slice priority corresponding to the target slice identifier on the frequency; The absolute frequency cell reselection evaluation criteria include at least one of the following: High priority frequency cell reselection evaluation criteria; Low priority frequency cell reselection evaluation criteria; Evaluation criteria for reselection of cells with the same frequency or frequency priority.

12. A cell reselection device based on slicing, characterized in that: include: A sending module, used to send slice related information associated with the serving cell frequency and / or slice related information associated with at least one neighboring frequency to the terminal device, where the slice related information associated with the serving cell frequency and / or the slice related information associated with at least one neighboring frequency is used to determine a target reselected cell; The target reselection cell is determined by the terminal device through the following steps: For at least one neighboring area supporting the target slice identifier to be evaluated, assigning an absolute frequency priority corresponding to the neighboring area frequency point according to a relative high or low situation of the slice priority corresponding to the target slice identifier associated with the neighboring area frequency point of each neighboring area; Performing cell reselection evaluation in descending order according to the absolute frequency priority corresponding to the neighboring cell frequency of each neighboring cell after the assignment, so as to determine the only target reselection cell; If the unique target reselection cell is not determined according to the absolute frequency priority corresponding to the neighboring cell frequency after the assignment, a cell reselection evaluation is performed on at least two neighboring cells having the same absolute frequency priority corresponding to the neighboring cell frequency according to the absolute frequency cell reselection evaluation criteria corresponding to the frequencies of the at least two neighboring cells, so as to determine the unique target reselection cell; If the number of cells satisfying the absolute frequency cell reselection evaluation criteria is greater than one, the cells are ranked according to the same-frequency or same-priority frequency cell reselection evaluation criteria, and the highest ranked cell is used as the target reselection cell; The step of assigning a value to the absolute frequency priority corresponding to the neighboring frequency includes: The original absolute frequency priority of the frequency point is replaced with the slice priority corresponding to the target slice identifier on the frequency point; The absolute frequency cell reselection evaluation criteria include at least one of the following: High priority frequency cell reselection evaluation criteria; Low priority frequency cell reselection evaluation criteria; Evaluation criteria for reselection of cells with the same frequency or frequency priority.

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