WO2022233006A1 - 随机接入方法、终端设备和计算机可读存储介质 - Google Patents

随机接入方法、终端设备和计算机可读存储介质 Download PDF

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Publication number
WO2022233006A1
WO2022233006A1 PCT/CN2021/091963 CN2021091963W WO2022233006A1 WO 2022233006 A1 WO2022233006 A1 WO 2022233006A1 CN 2021091963 W CN2021091963 W CN 2021091963W WO 2022233006 A1 WO2022233006 A1 WO 2022233006A1
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WIPO (PCT)
Prior art keywords
cell
network slice
slice information
terminal device
random access
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PCT/CN2021/091963
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English (en)
French (fr)
Inventor
付喆
杨皓睿
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to EP21939654.6A priority Critical patent/EP4266748A4/en
Priority to CN202180089853.5A priority patent/CN116762401A/zh
Priority to PCT/CN2021/091963 priority patent/WO2022233006A1/zh
Priority to CN202311708284.5A priority patent/CN117693065A/zh
Publication of WO2022233006A1 publication Critical patent/WO2022233006A1/zh
Priority to US18/224,737 priority patent/US20230363011A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
    • H04W74/0833—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using a random access procedure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0079—Transmission or use of information for re-establishing the radio link in case of hand-off failure or rejection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/13—Cell handover without a predetermined boundary, e.g. virtual cells

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a random access method, a terminal device, and a computer-readable storage medium.
  • EMBB Enhanced Mobile Broadband
  • URLLC Ultra-reliable Low Latency Communication
  • MIoT Massive Internet of Things
  • V2X Verticle to Everything
  • 5G 5th Generation Wireless Systems
  • the terminal device can use corresponding network slices for the required services.
  • the terminal device has service requirements, it needs to initiate random access to the network to establish a connection.
  • the terminal does not consider the network slice corresponding to the terminal's service requirements. Poor performance support.
  • the embodiments of the present application are expected to provide a random access method, a terminal device, and a computer-readable storage medium, so as to improve the effect of network device performance support for network slicing.
  • the embodiment of the present application provides a random access method, including:
  • the terminal device performs random access based on the required first network slice information.
  • An embodiment of the present application provides a terminal device, including:
  • the random access module is used for the terminal device to perform random access based on the required first network slice information.
  • An embodiment of the present application provides a terminal device, including: a processor and a memory for storing a computer program that can be run on the processor,
  • the processor is configured to execute the steps of the above method when running the computer program.
  • An embodiment of the present application provides a computer-readable storage medium storing a computer program.
  • the computer program When the computer program is executed by one or more processors, the processor executes the steps of the foregoing method.
  • Embodiments of the present application provide a random access method, a terminal, and a computer-readable storage medium.
  • the terminal device performs random access based on the required first network slice information; in this way, the terminal device can perform random access based on the required first network slice information. , using appropriate random access resources to perform random access, thereby improving the support effect of the network device on the performance of random access.
  • FIG. 1 is a block diagram of an optional communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an optional 5G architecture provided by an embodiment of the present application.
  • FIG. 3 is a schematic flowchart of an optional random access method provided by an embodiment of the present application.
  • FIG. 4 is a schematic diagram of an optional random access process provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of an optional random access process provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an optional random access process provided by an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of an optional random access method provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of an optional random access method provided by an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of an optional terminal device provided by an embodiment of the present application.
  • FIG. 10 is a schematic structural composition diagram of an optional terminal device provided by an embodiment of the present application.
  • FIG. 1 shows a block diagram of a communication system provided by an exemplary embodiment of the present application.
  • the communication system may include: a terminal device 101 and a network device 102 .
  • the terminal device 101 may include various handheld devices with wireless communication functions, vehicle-mounted devices, wearable devices, computing devices or other processing devices connected to wireless modems, as well as various forms of user equipment, mobile stations (Mobile Station, MS) , terminal device, etc.
  • terminal devices For the convenience of description, the devices mentioned above are collectively referred to as terminal devices.
  • the network device 102 and the terminal device 101 communicate with each other through a certain air interface technology, such as a Uu interface.
  • the network device 102 may be an evolved base station (evolved NodeB, eNB), an access point (access point, AP) or a relay station in a Long Term Evolution (Long Term Evolution, LTE) system, or a base station (such as a gNB) in a 5G system. Or transmission point (Transmission Point, TRP), etc.
  • eNB evolved NodeB
  • AP access point
  • gNB Long Term Evolution
  • TRP Transmission Point
  • the device with base station function is called gNodeB or gNB.
  • the description of "base station” may change.
  • the network device 102 may also be a wireless controller, a mobile switching center, a relay station, an access point, a vehicle-mounted device, a wearable device, a hub, a switch, a network bridge in a cloud radio access network (Cloud Radio Access Network, CRAN) scenario,
  • a router or a network device in a future communication system it can also be a base station in the NTN system (such as gNB or Transmission Point (TRP), Global System of Mobile communication, GSM) system or Code Division Multiple Access ( The base station (Base Transceiver Station, BTS) of the Code Division Multiple Access (CDMA) system, or the base station (NodeB, NB) in the Wideband Code Division Multiple Access (WCDMA) system, or the core network etc., this is not limited in the embodiments of the present application.
  • NTN system such as gNB or Transmission Point (TRP), Global System of Mobile communication, GSM) system or Code Division Multiple Access
  • BTS Base Transceiver Station
  • CDMA Code Division Multiple Access
  • the network device 102 provides services for a cell
  • the terminal device 101 communicates with the network device 102 through transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell
  • the cell can It is the cell corresponding to the network device 102 (such as a base station).
  • the cell may belong to a macro base station or a base station corresponding to a small cell.
  • the small cell here may include: urban cell (etro cell), micro cell (Micro cell) ), Pico cell, Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the cell may also be a hypercell (Hypercell).
  • FIG. 2 shows a non-roaming 5G architecture based on the reference point presentation method.
  • the 5G architecture includes: terminal equipment (Use Equipment, UE), radio access network (Radio Access Network, RAN), Access and Mobility Management Fuction (AMF), Session Management Function (SMF), User Plane Function (UPF), External Data Network (DN), Policy Control Function (PCF), Application Function (AF), Authentication Server Function (AUSF), Unified Data Management (UDM) and Network Slice Selection (Network Slice Selection Function, NSSF); that is to say, 5G technology supports the use of different network slices for different service requirements.
  • the terminal device obtains the required network slice, it can request the required network slice from the network. After the network agrees to the terminal device request After the network slice is created, a Protocol Data Unit session (PDU session) is established in the network slice for data transmission.
  • PDU session Protocol Data Unit session
  • network slices are usually identified by a single network slice selection assistance information (Single-Network Slice Selection Assistance Information, S-NSSAI); the combination of S-NSSAI is NSSAI; S-NSSAI includes slice/service type (slice/service Type, SST) and slice differentiation (SD), SST represents the scenario type of network slicing application, SD represents the refined distinction between different network slices in the application scenario corresponding to SST; for example, when SST is V2X, SD can be used to distinguish different car companies.
  • S-NSSAI Single-Network Slice Selection Assistance Information
  • SST slice/service type
  • SD slice differentiation
  • the UE when there is a service requirement, can send a registration request (Registration Request) to the network, and carry the requested S-NSSAI in the registration request; after receiving the registration request, the network will Network slices (Subscribed NSSAI) and Public Land Mobile Network (PLMN) determine the allowed network slices (Allowed NSSAI); all slices in the allowed network slices can cover the tracking area allocated by the network to the UE; the network determines the allowed network slices After the allowed network slice, the allowed network slice can be carried in the Registration Accept message (Registration Accept) and fed back to the UE. In this way, after receiving the allowed network slice, the UE can establish a PDU session in the allowed network slice, and then communicate with the UE. Data transfer between networks.
  • Registration Request Registration Request
  • PLMN Public Land Mobile Network
  • the terminal equipment can initiate random access in the currently residing cell, or can select a target cell from the neighboring cells of the currently residing cell, and initiate random access to the target cell; Perform random access in the target cell without considering the network slice requirements of the terminal device.
  • different cells may support different network slices; or, different cells support the same network slice with different priorities.
  • the terminal The cell to which the device randomly accesses may not support the network slicing required by the terminal device, or the priority of the required network slicing may not be high enough, resulting in poor performance of the network to support the network slicing required by the terminal device.
  • the overhead of handover signaling or redirection signaling is high.
  • This embodiment of the present application provides a random access method. As shown in FIG. 3 , the method may include:
  • the terminal device performs random access based on the required first network slice information.
  • the access layer of the terminal device may obtain the required first network slice information, and then perform random access according to the network slice information, where the network slice information is used to identify the network slice.
  • the network slice information may be S-NSSAI, or may be a network slice index index, a network slice group identifier, an access type of a network slice, and the like.
  • the access stratum (AS) of the terminal device may acquire the first network slice information from the non-access stratum (NAS) of the terminal device.
  • the NAS may determine the first network slice information based on the required service in the case of determining the service required by the terminal device; or obtain the first network slice information in the case of triggering random access; For example, the beam fails to recover, changes from the inactive state to the connected state, etc.; it is also possible to obtain the first network slice information when the cell reselection needs to be performed, for example, the channel quality of the current cell is lower than the preset quality threshold, etc. Therefore, the embodiments of the present application are not limited.
  • the first network slice information may include multiple network slice information, or may include one network slice information, which is not limited in this embodiment of the present application.
  • the AS may select the first network slice information required by the terminal device from the network slice information list.
  • the network slice information list may come from the NAS layer of the terminal device.
  • the NAS after determining the service requirements of the terminal device or the priority of slices, the NAS can send the required services or the priorities of slices to the AS. In this way, the AS can select the requirements from the network slice information list
  • the network slice information corresponding to the service or the corresponding high-priority network slice information is used as the first network slice information.
  • the network slice information list may include at least one of the following: allowed network slice information, contracted network slice information, configured network slice information (Configured NSSAI) and requested network slice (Request NSSAI) information.
  • the configured or allowed network slice information may be network slice information indicated to the terminal device by the network, that is, network slice information available to the UE.
  • the same network slice information may exist in the allowed network slice information, the contracted network slice information, the configured network slice information (Configured NSSAI) and the requested network slice (Request NSSAI) information.
  • the AS may determine the access cell according to the first network slice information, determine the access resource according to the first network slice information and the access cell, and initiate random access to the access cell through the access resource of the access cell. access.
  • the AS may use the current camping cell as the access cell, or may select the access cell from the neighboring cells of the current camping cell; this is not limited in the embodiment of the present application.
  • the terminal device can receive the system information of the cell in the idle state or inactive state; the system information carries the network slice information supported by the cell, that is to say, through the system information, the terminal device can determine the current Network slice information supported by the camping cell and neighboring cells, so as to determine whether the current camping cell and neighboring cells support the first network slicing information.
  • the terminal device may determine the network slice information supported by the frequency corresponding to the currently residing cell and the frequency corresponding to the neighboring cell, so as to determine whether different frequencies support the first network slice information.
  • the system information also carries the priority of the network slice information for each frequency point or cell.
  • the terminal device can also determine the current camping cell and neighboring cells, or different The frequency point supports the priority of the first network slice information.
  • the terminal device when the access cell supports the first network slice information, the terminal device may use the first access resource of the access cell to initiate random access to the access cell; if the access cell does not support In the case of the first network slice information, the terminal device may use the second access resource of the access cell to initiate random access to the access cell; wherein the first access resource is the network slice resource corresponding to the first network slice information ;
  • the second access resource is a resource that does not have a corresponding relationship with the network slice information.
  • its access resources may include network slicing resources corresponding to network slicing information; in some embodiments, it may also include network slicing information that does not have a corresponding relationship.
  • Reserved access (default slice RACH) resources for a cell supporting network slicing, its access resources may include network slicing resources corresponding to network slicing information; in some embodiments, it may also include network slicing information that does not have a corresponding relationship.
  • its access resources may include traditional legacy resources, and there is no corresponding relationship between legacy resources and network slicing information, such as common RACH resources; in some embodiments, also It may include reserved access (default slice RACH) resources that do not have a corresponding relationship with the network slice information.
  • network slice resource 1 corresponds to network slice information 1
  • network slice resource 2 corresponds to network slice information 2
  • network slice resource 3 corresponds to network slice information 3
  • the access resources of the access cell include network slice resource 2 and network slice resource 3.
  • Reserve access resources when the first network slice information is network slice information 2, the AS can use network slice resource 2 to initiate random access to the access cell; if the first network slice information is network slice information 1 In the case of , the terminal device can initiate random access to the access cell by using the reserved access resources.
  • the terminal device may first determine whether the access resource to be used is the first access resource or the second access resource, and then determine whether to use legacy random access or 4-step random access. Alternatively, the terminal device may first determine whether to use legacy random access or two-step random access, and then determine whether the access resource to be used is the first access resource or the second access resource. It should be noted that, before the terminal device determines the used access resource, or before determining whether to use legacy random access or two-step RACH, the terminal device may also first determine whether to select the uplink resource UL or the auxiliary uplink resource SUL. .
  • the terminal device may determine the access cell according to whether the current camping cell supports the first network slice information; for example, in the case that the current camping cell supports the first network slice information, determine the current camping cell The staying cell is the access cell; in the case that the current staying cell does not support the first network slice information, the access cell is determined from the neighboring cells. For example, in the case that the current camping cell supports the first network slice information and the channel quality meets the threshold, it is determined that the current camping cell is the access cell; if the current camping cell does not support the first network slice information and/or the channel quality is not When the threshold is met, the access cell is determined from the neighboring cells.
  • the terminal device may determine the access cell according to whether the neighbor cell supports the first network slice information, for example, in the case that the neighbor cell supports the first network slice information, determine that the neighbor cell is the access cell ; In the case that the neighbor cell does not support the first network slice information, determine that the current camping cell is the access cell. For example, in the case that the neighbor cell supports the first network slice information and the channel quality meets the threshold, determine that the currently residing cell is the access cell; in the case that the neighbor cell does not support the first network slice information and/or the channel quality does not meet the threshold , and determine that the current camping cell is the access cell.
  • the terminal device may first perform cell reselection to obtain a reselection result; determine the access cell according to the reselection result; and initiate random access to the access cell based on the first network slice information.
  • the cell reselection may be the first cell reselection or the second cell reselection; wherein, the first cell reselection does not consider the first network slice information; for example, the first cell reselection may be reselection from the current cell Select a cell whose channel quality is higher than the channel quality threshold in the cell and adjacent cells; the second cell reselection considers the first network slice information, for example, the second cell Cell for network slice information.
  • the reselection result includes reselection success or reselection failure; successful reselection means that the terminal device selects the target cell from the current camping cell and neighboring cells; in the case of successful reselection, the terminal device can select the target cell.
  • the cell is determined as the access cell; in the case that the reselection result is that the reselection fails, the terminal device may determine the current camping cell as the access cell.
  • the random access may be contention-based random access.
  • the contention-based random access includes four steps: 41-44.
  • the terminal device sends a message 1 (MSG1) to the network, and the message 1 carries a preamble sequence.
  • the preamble sequence is a preamble sequence used for contention sent by the terminal device on the contention-based time-frequency resource.
  • the preamble sequence is used by the network to estimate the uplink time.
  • the network responds with the preamble sequence and sends a message 2 (MSG2), that is, a random access response (Random Access Response, RAR), to the network.
  • the random access response includes a control subheader (subheader), and the control subheader includes the back-off indicator (BI) of message 1; it should be noted that the terminal device will enable random access after completing 41 Response window (RAR window), monitor the downlink control channel (PDCCH) in the random access response window, the downlink control channel is added by the random access radio network random access identifier (Random Access Radio Network Temporary Identifier, RA-RNTI).
  • RAR window 41 Response window
  • PDCH downlink control channel
  • RA-RNTI random access radio network random access identifier
  • the RA-RNTI is determined by the network according to the time-frequency resource location of the received preamble; RAR includes the preamble index and the Time Alignment Group (TAG) used to adjust the uplink timing.
  • TAG Time Alignment Group
  • an uplink grant (UL grant) and a temporary cell wireless network temporary identifier (Cell-Radio Network Temporary Identifier, C-RNTI); wherein, the uplink grant is used to indicate the uplink resources for sending message 3 in 44; the temporary C-RNTI is used for The downlink control channel of message 4 sent in scramble 44.
  • the terminal device sends a message 3 (MSG3) to the network device.
  • Message 3 is used to request the establishment of a radio resource control (radio resource control, RRC) connection; message 3 usually carries an event that triggers the random access, that is, the establishment reason; here, for initial access and RRC re-establishment, message 3 carries The ID of the terminal equipment is different, the initial access message 3 may carry the terminal device ID, and the message 3 of the RRC reestablishment may carry the connected state terminal ID (CCCH SDU).
  • RRC radio resource control
  • the network device responds to the message 3 and feeds back the message 4 to the terminal device; here, the message 4 is used to resolve the contention conflict.
  • the random access may be non-contention random access.
  • the non-contention random access includes three steps: 40-42.
  • the network device sends message 0 to the terminal device.
  • the message 0 carries the preamble sequence sent by the network device to the terminal device; in 41, the terminal device responds to the message 0 and sends a message 1 to the network device; the message carries the preamble sequence sent by the network device; at 42 In , the network device responds to message 1 and sends message 2, a random access response, to the terminal device.
  • non-contention random access adopts fewer steps and time blocks.
  • the random access may also be a two-step random access.
  • the steps of two-step random access include 61 and 62; in 61, the terminal device sends a message A (MSGA) to the network device; the information carried by the message A includes the information carried by MSG1 and the information carried by MSG3, for example, Preamble sequence code, terminal equipment identification and establishment reason.
  • the network device in response to message A, sends message B (MSGB) to the terminal device; the role of message B is equivalent to message 2 and message 4, that is, RAR and contention conflict resolution, two-step random access can improve the delay, Reduce signaling overhead.
  • the random access mode can be set as required, which is not limited in the embodiment of the present application.
  • the access resource may include a preamble and a random access channel opportunity (RACH Occasion); in some embodiments, the access resource may also include a priority parameter of random access.
  • the priority parameter is used to characterize the priority of the terminal device using random access resources; for example, the priority parameter of random access can be characterised by a power boosting factor (powerRampingStepHighPriority) and/or a backoff scaling factor (scalingFactorBI).
  • the terminal device can use appropriate access resources to perform random access based on the first network slice information, which improves the flexibility of random access and improves the network's ability to respond to the first network slice information. Support effect of network slice information.
  • the terminal device device performs the implementation of random access based on the requested network slice information, as shown in FIG. 7, which may include: S201-S202.
  • the terminal device performs cell reselection based on the first network slice information to obtain a first cell; the first cell is a currently residing cell or a neighboring cell that supports the first network slice information.
  • the terminal device may perform cell reselection based on the first network slice information, and obtain the first cell from the currently residing cell or the neighboring cell.
  • the first cell is a cell that supports the first network slice information.
  • the first cell may be a cell that supports the first network slice information and satisfies a first preset condition; wherein the first preset condition may include at least one of the following: satisfying the s criterion; channel The quality is higher than the channel quality threshold; the duration of the channel quality higher than the channel quality threshold is greater than or equal to the first duration; the priority of supporting the first network slice information is the highest; the frequency point has the highest priority.
  • satisfying the S criterion includes: the received power (Srxlev) is greater than 0, and the signal quality (Squal) is greater than 0.
  • the first duration and the channel quality threshold may be set as required, which is not limited in this embodiment of the present application.
  • the method for the terminal device to select the cell with the highest priority supporting the first network slice information and the highest frequency priority may include; A first preset number of cells with high priority are supported, and then the cell with the highest frequency priority is selected from the first preset number of cells as the first cell; A second preset number of cells with a high priority are selected, and a cell with the highest priority that supports the first network slice information is selected from the second preset number of cells as the first cell.
  • the first cell may be a currently residing cell and a neighboring cell, support the first network slice information, satisfy the S criterion, the channel quality is higher than the channel quality threshold, and support the first network slice information with the highest priority. community.
  • the terminal may select a first candidate cell that supports the first network slice information from the current camping cell and neighboring cells; then select a second candidate cell that satisfies the s criterion from the first candidate cells; then, from the Among the second candidate cells, the cell with the highest priority that supports the first network slice information is selected as the first cell.
  • the UE selects the neighbor cell as the first cell.
  • the terminal device may perform cell reselection based on the neighbor cell, and the obtained first cell is the neighbor cell that supports the first network slice community of information.
  • the first cell may be a neighboring cell that supports the first network slice information and meets the first preset condition; or, the first cell may also support the first network slice information and meets the first preset condition , and the frequency priority is lower than the neighboring cell of the currently residing cell; alternatively, the first cell may also support the first network slice information, satisfy the first preset condition, and the frequency priority is higher than that of the currently residing cell. Neighborhood.
  • the terminal device device initiates random access to the first cell.
  • the terminal device may use the first cell as an access cell, and initiate random access to the first cell.
  • the terminal device may initiate random access to the first cell by using the access resource corresponding to the first network slice information of the first cell.
  • the terminal device may also initiate random access to the first cell by using the second access resource.
  • the second access resource may be legacy resource or reserved slice resource.
  • the terminal device can perform cell reselection based on the first network slice information, select a cell that supports the first network slice information from neighboring cells, as the first cell, and initiate random access to the first cell.
  • the terminal device performs cell reselection based on the first network slice information, and can initiate random access to the currently residing cell in the case of failure of the cell reselection.
  • the failure of cell reselection means that the terminal device does not obtain the first cell from the currently camped cell or the neighboring cell.
  • the failure of cell reselection includes at least one of the following situations: neither the currently residing cell nor the neighboring cell supports the first network slice information, or the currently residing cell and the neighboring cell support the first network slice information, but do not satisfy the first network slice information. preset conditions.
  • the terminal device performs cell reselection based on the first network slice information, and in the case that the cell reselection fails, it can initiate random access to the currently residing cell through the second access resource.
  • the second access resource may be legacy resource or default slice RACH resource.
  • the terminal device performs cell reselection based on the first network slice information, and in the case of cell reselection failure, it can obtain the second cell according to the traditional legacy cell reselection rules; random access.
  • the terminal device performs cell reselection based on the first network slice information. If the cell reselection fails, and the terminal device does not reselect to the first cell from the neighboring cell, it can perform legacy cell reselection, and obtain The second cell; the second cell here includes at least one of the following: the currently residing cell or neighboring cell that satisfies the R criterion; the currently residing cell or neighboring cell having the highest frequency priority; the current residing cell or neighboring cell that satisfies the S criterion Area.
  • the terminal device may calculate the R value of the currently camped cell and the neighboring cell, and use the cell that satisfies the preset second condition as the cell that satisfies the R criterion, where the preset second condition includes at least one of the following: The cell with the highest R value; the cell with the R value greater than the R value threshold.
  • the R value threshold may be a preset threshold, or may be the R value of the currently camping cell; this is not limited in this embodiment of the present application.
  • the cells whose R value is greater than the R value threshold may include: cells whose R value is greater than the R value threshold and meet the second preset condition; the second preset condition may include at least one of the following: a continuous period where the R value is greater than the R value threshold The duration is greater than or equal to the second duration; the maximum number of beams (beams) supported; network slicing is supported; the frequency point has the highest priority.
  • the R value threshold is the R value of the currently residing cell
  • the terminal device may sort the R value of the cell with the received power greater than 0, and rank the neighboring cell with a higher R value than the currently residing cell and the duration is greater than or equal to Among the cells with the second duration, the cell with a higher frequency priority is used as the second cell.
  • the terminal device may sort the cells whose received power is greater than 0 by the R value, and select the cell whose neighbor cell has a higher R value than the currently residing cell within a certain period of time for the cell reselection time.
  • the cell with the highest frequency priority is used as the second cell.
  • the terminal device may sort the cells with the received power greater than 0 from high to low R value, and select a frequency point in a specific number of cells (one or more) with the highest R value.
  • the cell with the highest priority is used as the second cell.
  • the traditional legacy cell reselection rule does not consider the first network slice information; that is, the second cell reselected by the terminal device according to the legacy cell reselection rule may support the first network slice information, and also The first network slice information may not be supported.
  • a random access may be initiated to the second cell through the access resource corresponding to the first network slice information in the second cell.
  • a random access may be initiated to the second cell through the second access resource of the second cell.
  • the second access resource may be legacy resources of the second cell or default slice RACH resources of the second cell.
  • the terminal device after the terminal device fails to perform cell reselection based on the first network slice information, it can also perform legacy cell reselection based on the legacy cell reselection criterion, obtain a second cell, and initiate random access to the second cell.
  • the terminal device may perform cell reselection based on the first network slice information in at least one of the following situations: the currently residing cell does not support the first network slice information; the neighboring cell supports the first network slice information; the priority of the neighbor cell supporting the first network slice information is higher than the priority of the current resident cell supporting the first network slice information; the service corresponding to the first network slice information is the terminal-triggered MO service or the terminal-triggered data MO data service;
  • the first network slice information is not allowed network slice information; the first network slice information is obtained; the first network slice information is obtained before performing random access, or before sending MSG1, or before sending MSGA, or before sending MSG3 ; Receive the reselection indication information; the reselection indication information is used to instruct the terminal equipment to perform cell reselection; the terminal equipment supports cell reselection.
  • the terminal device may perform cell reselection based on the first network slice information under any one or a combination of the above conditions, and select a cell for random access according to the result of the cell reselection.
  • the terminal device may obtain the first cell through cell reselection.
  • the terminal device may obtain the cell supporting the first network slice information from the neighbor cell.
  • the terminal device in the case that the neighboring cell supports the first network slice information and the currently residing cell does not support the first network slice information, the terminal device performs cell reselection based on the first network slice information.
  • the priority of the neighbor cell supporting the first network slice information is higher than the priority of the currently residing cell supporting the first network slice information, and the terminal device can obtain support from the neighbor cell through cell reselection A cell with a higher priority in the first network slice information performs random access.
  • the terminal device when the service corresponding to the first network slice information is a network device-triggered (Mobile Terminal, MT) service, the terminal device may perform cell reselection based on the first network slice information;
  • the service corresponding to the first network slice information is a network device-triggered (Mobile Original, MO) service
  • the terminal device may perform cell reselection based on the first network slice information.
  • the triggering service can also be replaced by establishing or modifying a PDU session.
  • the terminal device when the service corresponding to the first network slice information is a terminal-triggered data (Mobile Original data, MO data) service in the MO service, the terminal device reselection.
  • a terminal-triggered data Mobile Original data, MO data
  • the service corresponding to the network slice information is the MO service
  • the terminal device may use the first network slice information based on the first network slice information when the currently residing cell does not support the MO service and/or the neighboring cell supports the MO service Perform cell reselection.
  • the service corresponding to the network slice information is the MO data service
  • the terminal may perform cell reselection based on the first network slice information in at least one of the following situations: the currently residing cell does not support the MO service; The current cell does not support the MO data service; the adjacent cell supports the MO service; the adjacent cell supports the MO data service.
  • the first network slice information is not allowed network slice information, indicating that the first network slice information does not belong to the allowed NSSAI. In this way, the terminal device can perform cell reselection based on the first network slice information.
  • the terminal device can perform cell reselection based on the first network slice information.
  • the terminal device may perform cell reselection based on the first network slicing information in the case of obtaining the first network slicing information after obtaining the second network slicing information required by the terminal device. That is, the terminal device may perform cell reselection based on the first network slice information in the case of acquiring the first network slice information again after acquiring the second network slice information.
  • the terminal device after acquiring the second network slice information, acquires the first network slice information, and the terminal device acquires the second network slice information and acquires the first network slice information at the same time.
  • the terminal device may perform cell reselection based on the first network slice information.
  • TA Tracking Area
  • the terminal device can obtain the allowed NSSAI corresponding to the current TA and save it; in this way, the terminal device in the current TA can obtain the first
  • the network slice information indicates that the terminal device has obtained the allowed NSSAI corresponding to the current TA before obtaining the first network slice information, and the terminal device can perform cell reselection according to the first network slice information.
  • the AS when the AS receives the first network slice information from the NAS, it is equivalent to receiving a cell reselection indication.
  • the terminal device In response to the cell reselection indication, the terminal device can perform Cell reselection.
  • the AS may perform cell reselection based on the first network slice information, and perform random access according to the result of the cell reselection.
  • the first network slice information includes one piece of network slice information; for example, after acquiring the first network slice information, the terminal device may determine the network slice information included in the first network slice information. number, in the case that the first network slice information includes only one network slice information, the cell reselection is performed based on the first network slice information.
  • the terminal device may determine whether to perform cell reselection according to the timing of acquiring the first network slice information.
  • the terminal device may perform cell reselection when acquiring the first network slice information and the time for acquiring the first network slice information is before performing random access; or, the terminal device may perform cell reselection after acquiring The first network slice information is obtained, and the cell reselection is performed before the preamble sequence for random access is sent to the network at the time of acquiring the first network slice information.
  • the terminal device can perform cell reselection before accessing to a cell through random access, and initiate access to other cells when other cells other than the cell are obtained through reselection.
  • the preamble sequence used for random access may be carried in MSG1 or in MSGA, which is not limited in this embodiment of the present application.
  • the AS of the terminal device may perform cell reselection in the case of receiving the reselection indication information of the NAS; here, the reselection indication information is used to instruct the terminal device to perform cell reselection based on the first network slice information Cell reselection.
  • the terminal device can perform cell reselection and random access every time it receives the reselection indication information; or, after receiving the reselection indication information, the terminal device can perform random access when random access is required. , all perform cell reselection; this is not limited in this embodiment of the present application.
  • the reselection indication information may come from a terminal device, such as a NAS of the terminal device, or a network device, such as at least one of a base station, an AMF, and a UPF.
  • a terminal device such as a NAS of the terminal device
  • a network device such as at least one of a base station, an AMF, and a UPF.
  • the reselection indication information may include at least one of the following: first network slice information; protocol data unit session establishment request information; service establishment request information; service request information; service request information; random access indication information.
  • the reselection indication information includes the first network slice information; that is, when the AS of the terminal device receives the first network slice information from the NAS of the terminal device, it can Network slicing information for cell reselection.
  • the reselection indication information includes protocol data unit session (PDU session) establishment request information; the AS of the terminal device may, when receiving the PDU session establishment request from the NAS, slice according to the first network information for cell reselection.
  • PDU session protocol data unit session
  • the reselection indication information includes service establishment request information; the AS of the terminal device may perform cell reselection according to the first network slice information when receiving the service establishment request information from the NAS.
  • the service establishment request includes: an MO service establishment request or an MT (Mobile Terminal, MT) service establishment request.
  • the MO service may be an MO data service.
  • the terminal device when the terminal device receives the MO data service establishment request, it needs to establish a PDU session in the network slice. In this way, when the terminal device receives the MO data service establishment request, it is equivalent to receiving the PDU session establishment request.
  • the reselection indication information includes service establishment request information; the AS of the terminal device may also perform cell reselection according to the first network slice information in the case of receiving the service request information from the NAS;
  • the service request information is used to indicate the service arriving at the terminal equipment.
  • the NAS when the MO service arrives, the NAS sends service request information to the AS, and the service request information carries the MO service identifier. After receiving the service request information, the AS can select the MO service from the network slice information list.
  • the corresponding network slice information is used as the first network slice information; in the case that the current cell does not support the first network slice information and the neighboring cell supports the first network slice information, cell reselection is performed according to the first network slice information.
  • the NAS may determine the network slice information corresponding to the MO service as the first network slice information, and send reselection indication information to the AS, where the reselection indication information includes the first network slice information and the service. request information.
  • the AS After receiving the reselection indication information, the AS can obtain the first network slice information in the reselection indication information, and perform cell reselection according to the first network slice information.
  • the reselection indication information includes service request (Service Request) information; when the AS of the terminal device receives the SR from the NAS, it can perform cell reselection according to the first network slice information.
  • Service Request Service Request
  • the reselection indication information includes a random access indication; when the NAS of the terminal device determines that random access needs to be triggered, it can send the random access indication information to the AS. Instruct the AS to perform random access; in the case of receiving the random access indication information, the AS can perform cell reselection according to the first network slice information, and determine the access cell according to the cell reselection result.
  • the terminal equipment may have the above-mentioned cell reselection function, that is, the function of performing cell reselection based on the first network slice information, or may not have the above-mentioned cell reselection function; In the case of reselection, cell reselection is performed based on the first network slice information.
  • whether the terminal device supports the cell reselection function may be preset. In this way, the terminal device may determine whether it supports cell reselection; or, the terminal device may receive a cell function indication from the network device In the case of information, it is determined that it can support the cell reselection function; this is not limited in this embodiment of the present application.
  • the terminal device can perform cell reselection based on the first network slice information only when it needs to perform cell reselection, and determine the access cell according to the cell reselection result; this reduces the resources for the terminal device to perform cell reselection. consumption, and the flexibility of cell reselection is improved, thereby improving the efficiency of random access.
  • the terminal device may initiate random access to the current camping cell based on the second access resource of the current camping cell under the condition that the current camping cell does not support network slice information.
  • the second access resource may be legacy access resource or reserved access resource.
  • the terminal device can determine whether the current residing cell supports the first network slice information, and in the case that the current residing cell does not support the first network slice information, the current residing cell uses the current The legacy access resource or reserved resource of the residing cell initiates random access to the current residing cell; if the current residing cell supports the first network slice information, the current residing cell supports and the first network slice The network slice resource corresponding to the information initiates random access to the current camping cell.
  • the terminal device can determine the access resources used to perform random access to the currently camped cell according to whether the current camping cell supports the first network slice information, so that the terminal device can use appropriate access resources to access the network.
  • the current camping cell improves the support effect of the current camping cell for the network slice required by the terminal equipment.
  • the terminal device may report the slicing requirement information to the network device when the current residing cell does not support the first network slicing information; the slicing requirement information includes non-support indication information; It indicates that the current camping cell does not support the first network slice information.
  • the terminal device may report the slicing requirement information to the network device when the currently residing cell does not support the first network slicing information; the slicing requirement information includes the first network slicing information.
  • the terminal device can report the slice requirement information in the MSG3 or MSGA payload (MSGA payload) of random access; in this way, the terminal device needs to obtain the first network slice information before sending the MSG3 or MSGA payload.
  • the terminal device may also obtain the first network slice information before sending MSG1 or MSGA
  • the terminal device may report the slicing requirement information to the network device; in this way, the network device may perform the next step in response to the slicing requirement information, for example, The network device instructs the terminal device to switch or redirect, or the network device may instruct the terminal device to perform cell reselection, determine the access cell based on the result of the cell reselection, and initiate random access to the access cell.
  • the slice requirement information includes unsupported indication information and first network slice information.
  • the terminal device may initiate random access to the current camping cell based on the second access resource of the current camping cell in the case that the current camping cell does not support the first network slice information, And report slice requirement information to the network device.
  • the terminal device may first obtain first network slice information, and then perform random access according to the first network slice information.
  • the terminal device needs to obtain the first network slice information before performing random access; in this way, the terminal device can use appropriate access resources to perform random access based on the first network slice information.
  • the terminal device may acquire first network slice information before triggering random access, and perform random access according to the first network slice information.
  • the terminal device may first acquire first network slice information, and after acquiring the first network slice information, the terminal device triggers random access, and the terminal device may perform random access based on the first network slice information.
  • the event that the terminal device triggers random access is the random access trigger event in 5G, such as initial access, RRC connection reestablishment, cell handover, time alignment in secondary cell establishment, etc., which can be set according to actual needs.
  • the embodiment of the present application does not limit it.
  • the random access performed by the terminal device is legacy random access based on the first network slice information, and the terminal device needs to obtain the first network slice information before sending MSG1 to the network device; in this way, the terminal The device may perform random access based on the first network slice information based on the first network slice information.
  • the random access performed by the terminal device is a two-step random access based on the first network slice information, and the terminal device needs to obtain the first network slice information before sending the MSGA to the network device; thus, The terminal device can then perform two-step random access based on the first network slice information based on the first network slice information.
  • the access resource corresponding to the first network slice information includes a preamble, and when the terminal device performs legacy random access, it sends the preamble in MSG1; In this case, the preamble is sent in MSGA; therefore, the terminal device needs to obtain the first network slice information before sending MSG1 or MSGA, so as to implement random access based on the access resources corresponding to the first network slice information.
  • FIG. 8 shows a schematic flowchart of a random access method. As shown in FIG. 8 , the method may include:
  • the reselection result is used to represent whether a first cell that supports the first network slice information and satisfies the S criterion is obtained from the currently residing cell or a neighboring cell;
  • the terminal device can determine whether there is a cell that supports the first network slice information and meets the S criterion in the currently residing cell or neighboring cells; One of the cells is selected as the first cell, and the reselection result is successful; if there is no cell that supports the first network slice information and satisfies the S criterion, it can be determined that the reselection result is reselection failure.
  • the terminal device may first determine whether the adjacent cell supports the first network slice information, and in the case that the adjacent cell supports the first network slice information, based on the first network slice information Slice information, perform cell reselection, and when the reselection result is that the first cell that supports the first network slice information and meets the S criterion is selected from the currently residing cell or neighboring cells, that is, if the reselection is successful, the first cell is passed through the first cell.
  • the network slicing resource corresponding to the first network slicing information supported by the cell initiates random access to the first cell; in the case of a cell reselection failure, the current resident cell is used legacy resources or reserved slicing resources to access the currently residing cell.
  • the cell initiates random access; in the case that the neighboring cell does not support it, selects access resources according to whether the current residing cell supports the first network slice, and initiates random access to the current residing cell; in this way, the first network slice is implemented based on information, and perform random access, thereby improving the network's support effect for network slicing required by terminal equipment.
  • the embodiment of the present application provides a random access method, and the method may include: S401-S404.
  • S402. Determine whether the currently residing cell supports the first network slice information; if yes, go to S403; if not, go to S404;
  • the terminal can determine which access resource to use to initiate random access to the current camping cell according to whether the current camping cell supports the first network slice information; this improves the current camping cell's demand for the terminal. Support effects for network slicing.
  • the embodiment of the present application provides a random access method, and the method may include: S501-S504.
  • the reselection result is used to represent whether a first cell that supports the first network slice information and satisfies the channel quality condition, such as the S criterion, is obtained from a neighboring cell;
  • the cell reselection if the cell reselection is successful, it means that the neighboring cell supports the first network slice information and satisfies the channel quality condition, such as the S criterion, and the reselected first cell is the neighboring cell.
  • the channel quality condition such as the S criterion
  • the terminal may preferentially use the network slice resource corresponding to the first network slice information of the currently residing cell in the case that the current residing cell supports the first network slice information, and initiate random access to the currently residing cell.
  • Access in the case that the currently residing cell does not support the information of the first network slice, then perform cell reselection from the neighboring cell, and in the case of reselection from the neighboring cell to the first cell, use the The network slice resource corresponding to the first network slice information initiates random access to the first cell, and in the case that the first cell is not reselected from the neighboring cell, the legacy resource or reserved slice resource of the currently residing cell is used, Initiate random access to the currently camping cell.
  • FIG. 9 is a schematic structural composition diagram of an optional terminal device provided by an embodiment of the present application. As shown in FIG. 9 , the terminal device 19 includes:
  • the random access module 1901 is configured to perform random access based on the required first network slice information.
  • the random access module 1901 is further configured to perform cell reselection based on the first network slice information to obtain a first cell; the first cell is a cell that supports the first network slice information Currently camping on a cell or a neighboring cell; initiating random access to the first cell.
  • the random access module 1901 is further configured to initiate random access to the first cell based on the access resources of the first cell corresponding to the first network slice information.
  • the random access module 1901 is further configured to perform cell reselection based on the first network slice information; if the cell reselection fails, initiate random access to the currently residing cell access.
  • the random access module 1901 is further configured to perform cell reselection based on the first network slice information; if the cell reselection fails, the The legacy resource or the reserved slice resource of the current cell initiates random access to the currently residing cell.
  • the random access module 1901 is further configured to perform cell reselection based on the first network slice information; if the cell reselection fails, according to the traditional legacy cell reselection criteria, obtain a second cell; initiating random access to the second cell.
  • the random access module 1901 is further configured for the first cell to be a currently residing cell or a neighboring cell that supports the first network slice information and satisfies the first preset condition; the The first preset condition includes at least one of the following: the first cell satisfies the S criterion; the channel quality of the first cell is higher than a channel quality threshold; the duration for which the channel quality of the first cell is higher than the channel quality threshold is greater than or equal to the first duration; the priority of the first cell to support the first network slice information is the highest; the priority of the frequency of the first cell is the highest.
  • the random access module 1901 is further configured to perform cell reselection based on the first network slice information in at least one of the following cases: the currently residing cell does not support the first network slice information; the neighbor cell supports the first network slice information; the priority of the neighbor cell supporting the first network slice information is higher than the priority of the current residing cell supporting the first network slice information; the first network slice information
  • the corresponding service is the terminal-triggered MO service or the terminal-triggered data MO data service; the first network slice information is not the allowed network slice information; the first network slice information is obtained; before random access is performed; Before sending MSG1; or, before sending MSGA, obtain the first network slice information; receive reselection indication information; the reselection indication information is used to instruct the terminal equipment to perform cell reselection; the terminal The device supports the cell reselection.
  • the reselection indication information includes at least one of the following: the first network slice information; protocol data unit session establishment request information; service establishment request information; service request information; service request information; random access indication information.
  • the random access module 1901 is further configured to acquire the first network slice information after acquiring the required second network slice information.
  • the first network slice information includes one network slice information.
  • the service corresponding to the first network slice information is a terminal-triggered MO service or a terminal-triggered data MO data service, including: the service corresponding to the first network slice information is a terminal-triggered MO service, and The currently residing cell supports the MO service, and the neighboring cell supports the MO service; or, the service corresponding to the first network slice information is an MO data service, and the currently residing cell supports the MO service MO data service, and the adjacent cell supports the MO data service.
  • the service is a terminal-triggered MO service.
  • the random access module 1901 is further configured to perform the cell reselection based on the first network slice information when the terminal device supports the cell reselection.
  • the random access module 1901 is further configured to, in the case that the current camping cell does not support the first network slice information, the terminal device based on the legacy resources of the current camping cell or The reserved slice resources of the current cell initiate random access to the currently camped cell.
  • the random access module 1901 is further configured to send slice requirement information to the network when the currently residing cell does not support the first network slice information; the slice requirement information includes the The currently residing cell does not support the indication information of the first network slice information or the first network slice information.
  • the random access module 1901 is further configured to acquire the first network slice information; and perform random access based on the first network slice information.
  • the random access module 1901 is further configured to acquire the first network slice information before the terminal device sends MSG1 or MSGA to the network device, or before triggering a random access procedure.
  • FIG. 10 is a schematic structural diagram of an optional terminal device provided by an embodiment of the present application.
  • the terminal device 20 includes a memory 2001 , a processor 2002 , and is stored in the memory 2001 and can be accessed on the processor 2002 A running computer program; wherein, when the processor is configured to run the computer program, the random access method in the foregoing embodiment is executed.
  • the terminal device 20 further includes a bus system 2003 ; various components in the terminal device 20 are coupled together through the bus system 2003 . It can be understood that the bus system 2003 is used to realize the connection and communication between these components. In addition to the data bus, the bus system 2003 also includes a power bus, a control bus and a status signal bus.
  • the memory in this embodiment may be a volatile memory or a non-volatile memory, and may also include both volatile and non-volatile memory.
  • the non-volatile memory may be Read Only Memory (ROM), Programmable Read-Only Memory (PROM), Erasable Programmable Read-Only Memory (Erasable Programmable Read-Only Memory) , EPROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Magnetic Random Access Memory (FRAM), Flash Memory (Flash Memory), Magnetic Surface Memory , CD-ROM, or CD-ROM (Compact Disc Read-Only Memory, CD-ROM); magnetic surface memory can be disk memory or tape memory.
  • Volatile memory may be Random Access Memory (RAM), which acts as an external cache.
  • RAM random access Memory
  • SRAM Static Random Access Memory
  • SSRAM Synchronous Static Random Access Memory
  • SSRAM Dynamic Random Access Memory
  • SDRAM Synchronous Dynamic Random Access Memory
  • DDRSDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • Enhanced Type synchronous dynamic random access memory Enhanced Synchronous Dynamic Random Access Memory, ESDRAM
  • synchronous link dynamic random access memory SyncLink Dynamic Random Access Memory, SLDRAM
  • direct memory bus random access memory Direct Rambus Random Access Memory, DRRAM
  • DRRAM Direct Rambus Random Access Memory
  • a processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the above-mentioned method can be completed by a hardware integrated logic circuit in a processor or an instruction in the form of software.
  • the above-mentioned processors may be general-purpose processors, DSPs, or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, and the like.
  • the processor may implement or execute the methods, steps, and logical block diagrams disclosed in the embodiments of this application.
  • a general purpose processor may be a microprocessor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application can be directly embodied as being executed by a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor.
  • the software module may be located in a storage medium, the storage medium is located in a memory, and the processor reads the information in the memory, and completes the steps of the foregoing method in combination with its hardware.
  • the embodiment of the present application also provides a computer-readable storage medium, on which a computer program is stored, and when the computer-readable storage medium is located in a terminal device, the random access method of the embodiment of the present application is implemented when the computer program is executed by a processor steps in .
  • the disclosed apparatus and method may be implemented in other manners.
  • the device embodiments described above are only illustrative.
  • the division of the modules is only a logical function division. In actual implementation, there may be other division methods.
  • multiple modules or components may be combined, or Can be integrated into another system, or some features can be ignored, or not implemented.
  • the coupling, or direct coupling, or communication connection between the various components shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or modules may be electrical, mechanical or other forms. of.
  • the terminal device performs random access based on the required first network slice information; in this way, the terminal device can use appropriate random access resources based on the required first network slice information to perform random access, thereby The support effect of the network device on the performance of random access is improved.

Abstract

本申请实施例公开了一种随机接入方法、终端设备和计算机可读存储介质，随机接入方法包括：终端设备基于需求的第一网络切片信息，执行随机接入。

Description

随机接入方法、终端设备和计算机可读存储介质 技术领域
本申请涉及通信技术领域，尤其涉及一种随机接入方法、终端设备和计算机可读存储介质。
背景技术
随着通信需求的提高，无线通信网络需要应对各种新兴的应用场景，例如，增强移动宽带(Enhanced mobile broad brand，EMBB)、超高可靠性低时延通信(ultra-reliable low latency communicaion，URLLC)、海量物联网(Massive Internet of Things，MIoT)、车联网(Verticle to Everything，V2X)等，由此，第5代移动通信技术(5th Generation Wireless Systems，5G)开始支持网络切片功能，即对于不同的业务需求采用不同的网络切片，如此，终端设备可以针对需求的业务采用对应的网络切片。终端设备在有业务需求的情况下，需要向网络发起随机接入以建立连接，然而，终端在随机接入过程中，并不考虑终端的业务需求对应的网络切片，导致网络设备对网络切片的性能支持的效果差。
发明内容
本申请实施例期望提供一种随机接入方法、终端设备和计算机可读存储介质，提高了网络设备对网络切片的性能支持的效果。
本申请实施例的技术方案可以如下实现：
本申请实施例提供了一种随机接入方法，包括：
终端设备基于需求的第一网络切片信息，执行随机接入。
本申请实施例提供了一种终端设备，包括：
随机接入模块，用于终端设备基于需求的第一网络切片信息，执行随机接入。
本申请实施例提供了一种终端设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器，
其中，所述处理器用于运行所述计算机程序时，执行上述方法的步骤。
本申请实施例提供了一种计算机可读存储介质，存储有计算机程序，当所述计算机程序被一个或多个处理器执行的时候，所述处理器执行上述方法的步骤。
本申请实施例提供了一种随机接入方法、终端和计算机可读存储介质，终端设备基于需求的第一网络切片信息，执行随机接入；如此，终端设备可以基于需求的第一网络切片信息，采用合适的随机接入资源，执行随机接入，从而提高了网络设备对随机接入的性能的支持效果。
附图说明
图1为本申请实施例提供的一种可选的通信系统的框图；
图2为本申请实施例提供的一种可选的5G架构示意图；
图3为本申请实施例提供的一种可选的随机接入方法流程示意图；
图4为本申请实施例提供的一种可选的随机接入过程示意图；
图5为本申请实施例提供的一种可选的随机接入过程示意图；
图6为本申请实施例提供的一种可选的随机接入过程示意图；
图7为本申请实施例提供的一种可选的随机接入方法流程示意图；
图8为本申请实施例提供的一种可选的随机接入方法流程示意图；
图9为本申请实施例提供的一种可选的终端设备的结构组成示意图；
图10为本申请实施例提供的一种可选的终端设备的结构组成示意图。
具体实施方式
图1示出了本申请一个示例性实施例提供的通信系统的框图，该通信系统可以包括：终端设备101和网络设备102。
终端设备101可以包括各种具有无线通信功能的手持设备、车载设备、可穿戴设备、计算设备或连接到无线调制解调器的其他处理设备，以及各种形式的用户设备，移动台(Mobile Station，MS)，终端设备(terminal device)等等。为方便描述，上面提到的设备统称为终端设备。网络设备102与终端设备101之间通过某种空口技术互相通信，例如Uu接口。
网络设备102可以是长期演进(Long Term Evolution，LTE)系统中的演进型基站(evolved NodeB，eNB)、接入点(access point，AP)或者中继站，也可以是5G系统中的基站(如gNB或传输点(Transmission Point，TRP))等，在5G NR-U系统中，具备基站功能的设备称为gNodeB或者gNB。随着通信技术的演进，“基站”这一描述可能会变化。网络设备102还可以是云无线接入网络(Cloud Radio Access Network，CRAN)场景下的无线控制器，移动交换中心，中继站，接入点，车载设备，可穿戴设备，集线器，交换机，网桥，路由器或者未来通信系统中的网络设备，还可以是NTN系统中的基站(如gNB或传输点(Transmission Point，TRP)，全球移动通讯(Global System of Mobile communication，GSM)系统或码分多址(Code Division Multiple Access，CDMA)系统的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统中的基站(NodeB，NB)、还可以为核心网等，对此，本申请实施例不做限定。
另外，在本申请实施例中，网络设备102为小区提供服务，终端设备101通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备102进行通信，该小区可以是网络设备102(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(small cell)对应的基站，这里的小小区可以包括：城市小区(etro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具 有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。另外，该小区还可以是超小区(Hypercell)。
图2示出了一种基于参考点呈现方式的非漫游5G架构，如图2所示，5G架构中包括：终端设备(Use Equipment，UE)、无线接入网(Radio Access Network，RAN)、接入及移动性管理功能(Access and Mobility Management Fuction，AMF)、会话管理功能(Session Management Function，SMF)、用户面功能实体(User Plane Function，UPF)、外部数据网络(Data Network，DN)、策略控制功能(Policy Control Function，PCF)、应用功能(Application Function，AF)、鉴权服务功能(Authentication Server Function，AUSF)、统一数据管理功能(Unified Data Management，UDM)及网络切片选择功能(Network Slice Selection Function，NSSF)；也就是说，5G技术支持对不同的业务需求采用不同的网络切片，终端设备获取需求的网络切片后，可以向网络请求所需求的网络切片，在网络同意终端设备请求的网络切片后，在网络切片中建立协议数据单元会话(Protocol Data Unit session，PDU session)来进行数据传输。
这里，网络切片通常采用单一网络切片选择辅助信息(Single-Network Slice Selection Assistance Information，S-NSSAI)来标识；S-NSSAI的组合为NSSAI；S-NSSAI包括切片/服务类型(slice/service Type，SST)和切片差异化(slice differentiation，SD)，SST表示网络切片应用的场景类型，SD表示在SST对应的应用场景下的细化的区分不同的网络切片；例如，SST为V2X的情况下，SD可以用来区分不同的车企。
相关技术中，UE在有业务需求的情况下，可以向网络发送注册请求(Registration Request)，将请求的S-NSSAI携带在注册请求中；网络在接收到注册请求后，将根据终端设备签约的网络切片(Subscribed NSSAI)和公共陆地网(Public Land Mobile Network，PLMN)确定允许的网络切片(Allowed NSSAI)；允许的网络切片中所有的切片都可以覆盖网络分配给UE的跟踪区；网络确定允许的网络切片后，可以将允许的网络切片携带在注册接收消息(Registration Accept)中反馈给UE，如此，UE在接收到允许的网络切片后，可以在允许的网络切片中建立PDU session，进而与网络之间进行数据传输。
需要说明的是，终端设备可以在当前驻留小区发起随机接入，也可以从当前驻留小区的邻区中选择目标小区，向目标小区发起随机接入；显然，终端设备无论在本区还是在目标小区进行随机接入，均未考虑终端设备的网络切片的需求，然而，不同的小区支持的网络切片可能不同；或者，不同的小区对相同的网络切片支持的优先级不同，如此，终端设备随机接入的小区可能不支持终端设备需求的网络切片，或者对需求的网络切片的优先级不够高，导致网络对终端设备需求的网络切片的支持性能不好，例如，网络时延大、切换信令或者重定向信令开销高等。
本申请实施例提供一种随机接入方法，如图3所示，该方法可以包括：
S101、终端设备基于需求的第一网络切片信息，执行随机接入。
在本申请实施例中，终端设备的接入层可以获取到需求的第一网络切片信息，再根据网络切片信息，执行随机接入，其中，网络切片信息用于标识网络切片。在一些实施例中，网络切片信息可以为S-NSSAI，也可以为网络切片索引index，网络切片组标识，网络切片的接入类型，等。
在本申请的一些实施例中，终端设备的接入层(AS)可以从终端设备的非接入层(NAS)获取第一网络切片信息。
在本申请实施例中，NAS可以在确定终端设备所需求的业务的情况下，基于需求的业务确定第一网络切片信息；也可以在触发随机接入的情况下，获取第一网络切片信息；例如，波束失败恢复、从非激活态转为连接态等；还可以在需要执行小区重选的情况下，获取第一网络切片信息，例如，当前小区信道质量低于预设质量阈值等，对此，本申请实施例不作限制。
这里，第一网络切片信息可以包括多个网络切片信息，也可以包括一个网络切片信息，对此，本申请实施例不作限制。
在本申请实施例中，AS可以从网络切片信息列表中选择终端设备需求的第一网络切片信息。这里，网络切片信息列表可以来自终端设备NAS层。
在本申请的一些实施例中，NAS在确定终端设备的业务需求或切片的优先级后，可以将需求的业务或切片的优先级发送给AS，如此，AS可以从网络切片信息列表中选择需求的业务对应的网络切片信息或对应高优先级网络切片信息作为第一网络切片信息。
需要说明的是，网络切片信息列表可以包括以下至少之一：允许的网络切片信息、签约的网络切片信息、配置的网络切片信息(Configured NSSAI)和请求的网络切片(Request NSSAI)信息。其中，配置的或允许的网络切片信息可以为网络指示给终端设备的网络切片信息，即UE可用的网络切片信息。其中，允许的网络切片信息、签约的网络切片信息、配置的网络切片信息(Configured NSSAI)和请求的网络切片(Request NSSAI)信息中可能存在相同的网络切片信息。
在本申请实施例中，AS可以根据第一网络切片信息，确定接入小区，根据第一网络切片信息和接入小区确定接入资源，通过接入小区的接入资源向接入小区发起随机接入。
在本申请实施例中，AS可以将当前驻留小区作为接入小区，也可以从当前驻留小区的邻区中选择接入小区；对此，本申请实施例不作限制。
需要说明的是，终端设备在空闲态或者非激活态的情况下，可以接收小区的系统信息；系统信息中携带有小区支持的网络切片信息，也就是说，通过系统信息，终端设备可以确定当前驻留小区和邻区支持的网络切片信息，从而确定当前驻留小区和邻区是否支持第一网络切片信息。或者，终端设备可以确定当前驻留小区对应的频点和邻区对应的频点支持的网络切片信息，从而确定不同的频点是否支持第一网络切片信息。
在本申请的一些实施例中，系统信息中还携带有网络切片信息针对各个频点或小区的优先级，如此，基于系统信息，终端设备还可以确定当前驻留小区和邻区，或，不同频点支持第一网络切片信息的优先级。
在本申请实施例中，在接入小区支持第一网络切片信息的情况下，终端设备可以采用接入小区的第一接入资源，向接入小区发起随机接入；在接入小区不支持第一网络切片信息的情况下，终端设备可以采用接入小区的第二接入资源，向接入小区发起随机接入；其中，第一接入资源为第一网络切片信息对应的网络切片资源；第二接入资源为与网络切片信息不存在对应关系的资源。
在本申请的一些实施例中，对于支持网络切片的小区，其接入资源可以包括与网络切片信息对应的网络切片资源；在一些实施例中，还可以包括与网络切片信息不存在对应关系的预留接入(default slice RACH)资源。
在本申请的一些实施例中，对于不支持网络切片的小区，其接入资源可以包括传统legacy资源，legacy资源与网络切片信息不存在对应关系，例如common RACH资源；在一些实施例中，还可以包括与网络切片信息不存在对应关系的预留接入(default slice RACH)资源。
示例性的，网络切片资源1对应网络切片信息1；网络切片资源2对应网络切片信息2，网络切片资源3对应网络切片信息3；接入小区的接入资源包括网络切片资源2和网络切片资源3、预留接入资源；在第一网络切片信息为网络切片信息2的情况下，AS可以采用网络切片资源2向接入小区发起随机接入；在第一网络切片信息为网络切片信息1的情况下，终端设备可以采用预留接入资源向接入小区发起随机接入。
在本申请的一些实施例中，在终端设备执行随机接入之前，终端设备可以先确定需要采用的接入资源是第一接入资源还是第二接入资源，再确定采用legacy随机接入还是4步随机接入。或者，终端设备可以先确定采用legacy随机接入还是两步随机接入，再确定需要采用的接入资源是第一接入资源还是第二接入资源。需要说明的是，终端设备在确定所采用的接入资源，或者，在确定采用legacy随机接入还是两步RACH之前，终端设备还可以先确定选择上行链路资源UL还是辅助上行链路资源SUL。
在本申请的一些实施例中，终端设备可以根据当前驻留小区是否支持第一网络切片信息，确定接入小区；例如，在当前驻留小区支持第一网络切片信息的情况下，确定当前驻留小区为接入小区；在当前驻留小区不支持第一网络切片信息的情况下，从邻区中确定接入小区。例如，在当前驻留小区支持第一网络切片信息且信道质量满足门限的情况下，确定当前驻留小区为接入小区；在当前驻留小区不支持第一网络切片信息和/或信道质量不满足门限情况下，从邻区中确定接入小区。
在本申请的一些实施例中，终端设备可以根据邻区是否支持第一网络切片信息，确定接入小区，例如，在邻区支持第一网络切片信息的情况下，确定邻区为接入小区；在邻区不支持第一网络切片信息的情况下，确定当前驻留小区为接入小区。例如，在邻区支持第一网络切片信息且信道质量满足门限的情况下，确定当前驻留小区为接入小区；在邻区不支持第一网络切片信息和/或信道质量不满足门限情况下，确定当前驻留小区为接入小区。
在本申请的一些实施例中，终端设备可以先执行小区重选，得到重选结果；根据重选结果确定接入小区；基于第一网络切片信息向接入小区发起随机接入。
需要说明的是，小区重选可以为第一小区重选或第二小区重选；其中，第一小区重选不考虑第一网络切片信息；例如，第一小区重选可以为从当前驻留小区和邻区中选择信道质量高于信道质量门限的小区；第二小区重选考虑第一网络切片信息，例如，第二小区重选可以为从当前驻留小区和邻区中选择支持第一网络切片信息的小区。
需要说明的是，重选结果包括重选成功或重选失败；重选成功表示终端设备从当前驻留小区和邻区中选择到目标小区；在重选成功的情况下，终端设备可以将目标小区确 定为接入小区；在重选结果为重选失败的情况下，终端设备可以将当前驻留小区确定为接入小区。
在本申请的一些实施例中，随机接入可以为基于竞争的随机接入，参考图4，基于竞争的随机接入包括4个步骤：41-44。
在41中，终端设备向网络发送信息1(MSG1)，消息1中携带有前导码序列。其中，前导码序列是终端设备在基于竞争的时频资源上发送的用于竞争的前导码序列。前导码序列用于网络估计上行时间。
在42中，网络响应与前导码序列，向网络发送消息2(MSG2)，即随机接入响应(Random Access Response，RAR)。随机接入响应中包括控制子头(subheader)，控制子头中包含消息1的回退时间(Back-off Indicator，BI)；需要说明的是，终端设备在完成41后，将开启随机接入响应窗口(RAR window)，在随机接入响应窗口内监测下行控制信道(PDCCH)，该下行控制信道是由随机接入无线网络随机接入标识(Random Access Radio Network Temporary Identifier，RA-RNTI)加扰的，RA-RNTI是网络根据接收到前导序列码的时频资源位置确定的；RAR中包括前导序列码索引(preamble index)、用于调整上行时序的时间调整组(Time Alignment Group，TAG)、上行授权(UL grant)和临时的小区无线网络临时标识(Cell-Radio Network Temporary Identifier，C-RNTI)；其中，上行授权用于指示44中发送消息3的上行资源；临时C-RNTI用于加扰44中发送的消息4的下行控制信道。
在43中，终端设备向网络设备发送消息3(MSG3)。消息3用于请求建立无线资源控制(radio resource control，RRC)连接；消息3中通常携带有触发该随机接入的事件，即建立原因；这里，对于初始接入和RRC重建，消息3中携带的终端设备标识不同，初始接入的消息3中可以携带终端设备标识，RRC重建的消息3中可以携带连接态终端标示(CCCH SDU)。
在44中，网络设备响应于消息3，向终端设备反馈消息4；这里，消息4用于解决竞争冲突。
在本申请的一些实施例中，随机接入可以为非竞争的随机接入，参考图5，非竞争的随机接入包括3个步骤：40-42。在40中，网络设备向终端设备发送消息0。消息0中携带有网络设备下发给终端设备的前导码序列；在41中，终端设备响应于消息0，向网络设备发送消息1；消息中携带有网络设备下发的前导码序列；在42中，网络设备响应于消息1，向终端设备发送消息2，随机接入响应。相比竞争的随机接入，采用非竞争的随机接入步骤少，时间块。
在本申请的一些实施例中，随机接入还可以为两步随机接入。参考图6，两步随机接入的步骤包括61和62；在61中，终端设备向网络设备发送消息A(MSGA)；消息A携带的信息包括MSG1携带的信息以及MSG3携带的信息，例如，前导序列码、终端设备标识和建立原因。在62中，网络设备响应于消息A，向终端设备发送消息B(MSGB)；消息B的作用相当于消息2和消息4，即RAR和竞争冲突解决，两步随机接入可以提高时延，降低信令开销。
在本申请实施例中，随机接入的方式可以根据需要设置，对此，本申请实施例不作 限制。
需要说明的是，接入资源可以包括前导序列(preamble)、随机接入信道机会(RACH Occasion)；在一些实施例中，接入资源还可以包括随机接入的优先级参数，随机接入的优先级参数用于表征终端设备使用随机接入资源的优先级；例如，随机接入的优先级参数可以通过功率提升因子(powerRampingStepHighPriority)和/或回退缩放比例系数(scalingFactorBI)表征。
可以理解的是，终端设备在获取需求的第一网络切片信息后，可以基于第一网络切片信息，采用合适的接入资源执行随机接入，提高了随机接入的灵活性以及网络对第一网络切片信息的支持效果。
在本申请的一些实施例中，S101中终端设备设备基于所请求的网络切片信息，执行随机接入的实现，如图7所示，可以包括：S201-S202。
S201、终端设备基于第一网络切片信息进行小区重选，得到第一小区；第一小区为支持第一网络切片信息的当前驻留小区或邻区。
在本申请实施例中，终端设备可以基于第一网络切片信息进行小区重选，从当前驻留小区或邻区中得到第一小区。其中，第一小区为支持第一网络切片信息的小区。
在本申请的一些实施例中，第一小区可以为支持第一网络切片信息，且满足第一预设条件的小区；其中，第一预设条件可以包括以下至少之一：满足s准则；信道质量高于信道质量门限；信道质量高于信道质量门限的持续时长大于或等于第一时长；支持第一网络切片信息的优先级最高；频点优先级最高。
在本申请实施例中，满足S准则包括：接收功率(Srxlev)大于0，且信号质量(Squal)大于0。
在本申请实施例中，第一时长和信道质量门限可以根据需要设置，对此本申请实施例不作限制。
需要说明的是，终端设备选择支持第一网络切片信息的优先级最高，且频点优先级最高的小区的方式，可以包括；终端设备先按照支持第一网络切片信息的优先级进行排序，得到支持优先级高的第一预设数量的小区，再从第一预设数量的小区中选择频点优先级最高的小区作为第一小区；或者，终端先按照频点优先级进行排序，得到频点优先级高的第二预设数量的小区，再从第二预设数量的小区中选择支持第一网络切片信息的优先级最高的小区作为第一小区。
示例性的，第一小区可以为当前驻留小区和邻区中，支持第一网络切片信息，满足S准则，信道质量高于信道质量门限，并且，支持第一网络切片信息的优先级最高的小区。示例性的，终端可以从当前驻留小区和邻区中选择出支持第一网络切片信息的第一候选小区；再从第一候选小区中选择出满足s准则的第二候选小区；然后，从第二候选小区中选择支持第一网络切片信息的优先级最高的小区，作为第一小区。
示例性的，如邻区支持第一网络切片的优先级高于当前驻留小区支持第一网络切片的优先级，UE选择邻区作为第一小区。
在本申请的一些实施例中，在当前驻留小区不支持第一网络切片信息的情况下，终端设备可以基于邻区进行小区重选，得到的第一小区为邻区中支持第一网络切片信息的 小区。在一些实施例中，第一小区可以为支持第一网络切片信息，且满足第一预设条件的邻区；或者，第一小区也可以为支持第一网络切片信息，满足第一预设条件，且频点优先级低于当前驻留小区的邻区；或者，第一小区也可以为支持第一网络切片信息，满足第一预设条件，且频点优先级高于当前驻留小区的邻区。
S202、终端设备设备对第一小区发起随机接入。
在本申请实施例中，终端设备在确定出第一小区后，可以将第一小区作为接入小区，对第一小区发起随机接入。
在本申请的一些实施例中，终端设备可以通过第一小区的第一网络切片信息对应的接入资源，对第一小区发起随机接入。
在本申请的一些实施例中，终端设备也可以通过第二接入资源对第一小区发起随机接入。
在一些实施例中，第二接入资源可以为legacy资源或预留切片资源。
可以理解的是，终端设备可以基于第一网络切片信息进行小区重选，从邻区中选择出支持第一网络切片信息的小区，作为第一小区，对第一小区发起随机接入。
在本申请的一些实施例中，终端设备基于第一网络切片信息进行小区重选，在小区重选失败的情况下，可以向当前驻留小区发起随机接入。
在本申请实施例中，小区重选失败表示终端设备没有从当前驻留小区或邻区中得到第一小区。这里，小区重选失败包括以下至少一种情况：当前驻留小区和邻区均不支持第一网络切片信息，或者，当前驻留小区和邻区支持第一网络切片信息，但不满足第一预设条件。
在本申请实施例中，终端设备基于第一网络切片信息进行小区重选，在小区重选失败的情况下，可以通过第二接入资源向当前驻留小区发起随机接入。
在本申请实施例中，第二接入资源可以为legacy资源或default slice RACH资源。
在本申请的一些实施例中，终端设备基于第一网络切片信息进行小区重选，在小区重选失败的情况下，可以根据传统legacy小区重选规则，得到第二小区；对第二小区发起随机接入。
在本申请实施例中，终端设备基于第一网络切片信息进行小区重选，小区重选失败，终端设备没有从邻区中重选到第一小区的情况下，可以进行legacy小区重选，得到第二小区；这里第二小区包括以下至少之一：满足R准则的当前驻留小区或邻区；频点优先级最高的当前驻留小区或邻区；满足S准则的当前驻留小区或邻区。
在本申请实施例中，终端设备可以计算当前驻留小区和邻区的R值，将满足预设第二条件的小区作为满足R准则的小区，其中预设第二条件包括以下至少之一：R值最高的小区；R值大于R值门限的小区。
在一些实施例中，R值门限可以为预设的门限，也可以为当前驻留小区的R值；对此，本申请实施例不作限制。
其中，R值大于R值门限的小区可以包括：R值大于R值门限，且满足第二预设条件的小区；第二预设条件可以包括以下至少之一：R值大于R值门限的持续时长大于或者等于第二时长；支持的波束(beam)数最多；支持网络切片；频点优先级最高。
示例性的，R值门限为当前驻留小区的R值，终端设备可以对接收功率大于0的小区，进行R值排序，将邻区比当前驻留小区的R值高且持续时长大于或者等于第二时长的小区中，频点优先级高的小区作为第二小区。
在本申请的一些实施例中，终端设备可以对接收功率大于0的小区，进行R值排序，将小区重选时间在一定时间内邻区比当前驻留小区的R值高的小区中，选择频点优先级最高的小区作为第二小区。
在本申请的另一些实施例中，终端设备可以对接收功率大于0的小区，进行R值从高到低排序，在R值最高的特定个数小区中(一个或多个)，选择频点优先级最高的小区作为第二小区。
在本申请实施例中，传统legacy小区重选规则，不考虑第一网络切片信息；也就是说，终端设备根据legacy小区重选规则重选的第二小区，可能支持第一网络切片信息，也可能不支持第一网络切片信息。
在本申请的一些实施例中，在第二小区支持第一网络切片信息的情况下，可以通过第二小区中与第一网络切片信息对应的接入资源，向第二小区发起随机接入。
在本申请的一些实施例中，在第二小区不支持第一网络切片信息的情况下，可以通过第二小区的第二接入资源，向第二小区发起随机接入。第二接入资源可以为第二小区的legacy资源或第二小区的default slice RACH资源。
可以理解的是，终端设备基于第一网络切片信息进行小区重选失败后，还可以通过legacy小区重选准则，进行legacy小区重选，得到第二小区，向第二小区发起随机接入。
在本申请的一些实施例中，终端设备可以在以下至少一种情况下，基于第一网切片信息进行小区重选：当前驻留小区不支持第一网络切片信息；邻区支持第一网络切片信息；邻区支持第一网络切片信息的优先级高于当前驻留小区支持第一网络切片信息的优先级；第一网络切片信息对应的业务为终端触发MO业务或终端触发数据MO data业务；第一网络切片信息不是允许的网络切片信息；获取到第一网络切片信息；在执行随机接入之前，或在发送MSG1之前，或在发送MSGA，或发送MSG3之前，获取到第一网络切片信息；接收到重选指示信息；重选指示信息用于指示终端设备设备进行小区重选；终端设备支持小区重选。
在本申请实施例中，终端设备可以在以上任意一种或任意多种情况的组合下，基于第一网络切片信息进行小区重选，根据小区重选的结果，选择小区进行随机接入。
在本申请的一些实施例中，在当前驻留小区不支持第一网络切片信息的情况下，邻区可能存在第一小区，如此，终端设备通过小区重选可能得到第一小区。
在本申请的一些实施例中，在邻区支持第一网络切片信息的情况下，终端设备可以从邻区中得到支持第一网络切片信息的小区。
在本申请的一些实施例中，在邻区支持第一网络切片信息，且当前驻留小区不支持第一网络切片信息的情况下，终端设备基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，邻区支持第一网络切片信息的优先级高于当前驻留小区支持第一网络切片信息的优先级，终端设备可以通过小区重选，从邻区中得到支持第一网络切片信息的优先级更高的小区，进行随机接入。
在本申请的一些实施例中，在第一网络切片信息对应的业务为网络设备触发(Mobile Terminal，MT)业务的情况下，终端设备可以基于第一网络切片信息进行小区重选；或者，在第一网络切片信息对应的业务为网络设备触发(Mobile Original，MO)业务的情况下，终端设备可以基于第一网络切片信息进行小区重选。需要说明的是，触发业务也可以用建立或修改PDU session等来代替。
在本申请的一些实施例中，在第一网络切片信息对应的业务为MO业务中的终端触发数据(Mobile Original data，MO data)业务的情况下，终端设备可以基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，网络切片信息对应的业务为MO业务，终端设备可以在当前驻留小区不支持MO业务，和/或邻区支持MO业务的情况下，基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，网络切片信息对应的业务为MO data业务，终端可以在以下至少一种情况下，基于第一网络切片信息进行小区重选：当前驻留小区不支持MO业务；当前小区不支持MO data业务；邻区支持MO业务；邻区支持MO data业务。
在本申请实施例中，第一网络切片信息不是允许的网络切片信息，表示第一网络切片信息不属于allowed NSSAI，如此，终端设备可以基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，终端设备只要获取到第一网络切片信息，就可以基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，终端设备可以在获取到终端设备需求的第二网络切片信息之后，获取到第一网络切片信息的情况下，基于第一网络切片信息进行小区重选。也就是说，终端设备可以在已经获取过第二网络切片信息后，再次获取到第一网络切片信息的情况下，基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，终端设备在获取第二网络切片信息后，获取了第一网络切片信息，且终端设备在获取第二网络切片信息与获取第一网络切片信息时，在相同的跟踪区(Tracking Area，TA)内，或者，在TA边界，终端设备可以基于第一网络切片信息进行小区重选。
需要说明的是，终端设备在当前TA内，第一次接收到需求的网络切片信息后，可以获取到当前TA对应的allowed NSSAI并保存；如此，终端设备在当前TA内，又获取到第一网络切片信息，表示终端设备在获取到第一网络切片信息之前，已经获取了当前TA对应的allowed NSSAI，终端设备可以根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，在AS接收来自NAS的第一网络切片信息的情况下，相当于接收到小区重选指示，响应于小区重选指示，终端设备可以基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，AS从网络切片列表中选择了第一网络切片信息后，可以基于第一网络切片信息进行小区重选，根据小区重选的结果进行随机接入。
在本申请的一些实施例中，第一网络切片信息包括一个网络切片信息；示例性的，终端设备在获取到第一网络切片信息后，可以确定第一网络切片信息中包括的网络切片 信息的数量，在第一网络切片信息只包括一个网络切片信息的情况下，基于第一网络切片信息进行小区重选。
在本申请的一些实施例中，终端设备可以在获取到第一网络切片信息后，根据获取到第一网络切片信息的时机，确定是否进行小区重选。
在本申请实施例中，终端设备可以在获取第一网络切片信息，且获取第一网络切片信息的时间在执行随机接入之前的情况下，进行小区重选；或者，终端设备可以在获取到第一网络切片信息，且获取第一网络切片信息的时间在向网络发送用于随机接入的前导码序列之前，进行小区重选。如此，终端设备可以在通过随机接入，接入到小区之前进行小区重选，在重选得到该小区以外的其他小区的情况下，向其他小区执行发起接入。
在本申请实施例中，用于随机接入的前导码序列可以携带在MSG1中，也可以携带在MSGA中，对此，本申请实施例不作限制。
在本申请的一些实施例中，终端设备的AS可以在接收到NAS的重选指示信息的情况下，进行小区重选；这里，重选指示信息用于指示终端设备基于第一网络切片信息进行小区重选。
需要说明的是，终端设备可以在每接收到一次重选指示信息，进行一次小区重选和随机接入；或者，终端设备可以在接收到重选指示信息之后，在需要随机接入的情况下，都进行小区重选；对此，本申请实施例不作限制。
需要说明的是，重选指示信息，可以来自终端设备，如终端设备的NAS，也可以来自网络设备，如基站，AMF，UPF等至少之一。
在本申请的一些实施例中，重选指示信息可以包括以下至少一个：第一网络切片信息；协议数据单元会话建立请求信息；业务建立请求信息；业务请求信息；服务请求信息；随机接入指示信息。
在本申请的一些实施例中，重选指示信息包括第一网络切片信息；也就是说，终端设备的AS在接收到来自终端设备的NAS的第一网络切片信息的情况下，可以根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，重选指示信息包括协议数据单元会话(PDU session)建立请求信息；终端设备的AS可以在接收到来自NAS的PDU session建立请求的情况下，根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，重选指示信息包括业务建立请求信息；终端设备的AS可以在接收到来自NAS的业务建立请求信息的情况下，可以根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，业务建立请求包括：MO业务建立请求或MT(Mobile Terminal，MT)业务建立请求。
在本申请的一些实施中，MO业务可以为MO data业务。
在本申请实施例中，终端设备在接收MO data业务建立请求的情况下，需要在网络切片中建立PDU session，如此，终端设备接收到MO data业务建立请求，相当于接收到PDU session建立请求。
在本申请的一些实施例中，重选指示信息包括业务建立请求信息；终端设备的AS 也可以在接收到来自NAS的业务请求信息的情况下，可以根据第一网络切片信息进行小区重选；业务请求信息用于指示到达终端设备的业务。
示例性的，在MO业务到达的情况下，NAS向AS发送业务请求信息，业务请求信息中携带了MO业务标识，AS在接收到业务请求信息的后，可以从网络切片信息列表中选择MO业务对应的网络切片信息作为第一网络切片信息；在当前小区不支持第一网络切片信息，且邻区支持第一网络切片信息的情况下，根据第一网络切片信息进行小区重选。
示例性的，在MO业务到达的情况下，NAS可以确定MO业务对应的网络切片信息作为第一网络切片信息，向AS发送重选指示信息，重选指示信息中包括第一网络切片信息和业务请求信息，AS接收到重选指示信息后，可以获取重选指示信息中的第一网络切片信息，并根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，重选指示信息包括服务请求(Service Request)信息；终端设备的AS在接收到来自NAS的SR的情况下，可以根据第一网络切片信息进行小区重选。
在本申请的一些实施例中，重选指示信息包括随机接入指示；终端设备的NAS在确定需要触发随机接入的情况下，可以向AS发送随机接入指示信息，通过随机接入指示信息指示AS进行随机接入；AS在接收到随机接入指示信息的情况下，可以根据第一网络切片信息进行小区重选，根据小区重选结果，确定接入小区。
在本申请的一些实施例中，终端设备可能具有上述小区重选功能，即基于第一网络切片信息进行小区重选的功能，也可能不具有上述小区重选功能；如此，终端可以在支持小区重选的情况下，基于第一网络切片信息进行小区重选。
在本申请实施例中，终端设备是否支持小区重选功能，可以是预先设置好的，如此，终端设备可以确定自身是否支持小区重选；或者，终端设备可以在接收到网络设备的小区功能指示信息的情况下，确定自身可以支持小区重选功能；对此，本申请实施例不作限制。
可以理解的是，终端设备可以在需要进行小区重选的情况下，才基于第一网络切片信息进行小区重选，根据小区重选结果确定接入小区；减少了终端设备进行小区重选的资源消耗，提高了小区重选的灵活性，从而提高随机接入的效率。
在本申请的一些实施例中，终端设备可以在当前驻留小区不支持网络切片信息的情况下，基于当前驻留小区的第二接入资源，向当前驻留小区发起随机接入。其中，第二接入资源可以为legacy接入资源或预留接入资源。
在本申请实施例中，终端设备在获取第一网络切片信息后，可以判断当前驻留小区是否支持第一网络切片信息，在当前驻留小区不支持第一网络切片信息的情况下，采用当前驻留小区的legacy接入资源或预留资源，向当前驻留小区发起随机接入；在当前驻留小区支持第一网络切片信息的情况下，通过当前驻留小区支持的与第一网络切片信息对应的网络切片资源，向当前驻留小区发起随机接入。
可以理解的是，终端设备可以根据当前驻留小区是否支持第一网络切片信息，确定对当前驻留小区执行随机接入采用的接入资源，使终端设备可以采用合适的接入资源接 入到当前驻留小区，提高了当前驻留小区对终端设备需求的网络切片的支持效果。
在本申请的一些实施例中，终端设备可以在当前驻留小区不支持第一网络切片信息的情况下，向网络设备上报切片需求信息；切片需求信息包含不支持指示信息；不支持指示信息用于表征当前驻留小区不支持第一网络切片信息。
在本申请的一些实施例中，终端设备可以在当前驻留小区不支持第一网络切片信息的情况下，向网络设备上报切片需求信息；切片需求信息包含所述第一网络切片信息。
需要说明的是，终端设备可以在随机接入的MSG3或MSGA的信息载荷(MSGA payload)中上报切片需求信息；如此，终端设备需要在发送MSG3或MSGA payload之前，获取第一网络切片信息。或者，终端设备也可以在发送MSG1或MSGA之前，获取第一网络切片信息
在本申请实施例中，终端设备在当前驻留小区不支持第一网络切片信息的情况下，可以向网络设备上报切片需求信息；如此，网络设备可以响应切片需求信息进行下一步处理，例如，网络设备指示终端设备切换或重定向，或者，网络设备可以指示终端设备进行小区重选，通过小区重选的结果，通过小区重选的结果确定接入小区，向接入小区发起随机接入。
在本申请的一些实施例中，切片需求信息包括不支持指示信息和第一网络切片信息。
在本申请的一些实施例中，终端设备可以在当前驻留小区不支持第一网络切片信息的情况下，基于当前驻留小区的第二接入资源，向当前驻留小区发起随机接入，以及向网络设备上报切片需求信息。
在本申请的一些实施例中，终端设备可以先获取第一网络切片信息，再根据第一网络切片信息，执行随机接入。
在本申请实施例中，终端设备需要在执行随机接入前，获取到第一网络切片信息；如此，终端设备可以基于第一网络切片信息，采用合适的接入资源，执行随机接入。
在本申请的一些实施例中，终端设备可以在触发随机接入之前，获取到第一网络切片信息，根据第一网络切片信息执行随机接入。
在本申请的一些实施例中，终端设备可以先获取第一网络切片信息，在获取第一网络切片信息后，终端设备触发随机接入，终端设备可以基于第一网络切片信息执行随机接入。
需要说明的是，终端设备触发随机接入的事件为5G中的随机接入触发事件，例如：初始接入、RRC连接重建、切换小区、在辅小区建立时间对齐等，可以根据实际需要设置，对此，本申请实施例不做限制。
在本申请的一些实施例中，终端设备执行的随机接入为基于第一网络切片信息的legacy随机接入，终端设备需要在向网络设备发送MSG1之前获取到第一网络切片信息；如此，终端设备就可以基于第一网络切片信息，执行基于第一网络切片信息的随机接入。
在本申请的一些实施例中，终端设备执行的随机接入为基于第一网络切片信息的两步随机接入，终端设备需要在向网络设备发送MSGA之前获取到第一网络切片信息；如此，终端设备就可以基于第一网络切片信息，执行基于第一网络切片信息的两步随机接入。
需要说明的是，第一网络切片信息对应的接入资源包括前导序列码，而终端设备在进行legacy随机接入的情况下，是在MSG1中发送前导序列码；在进行两步随机接入的情况下，是在MSGA中发送前导序列码；因此，终端设备需要在发送MSG1或MSGA之前，获取第一网络切片信息，才能实现基于第一网络切片信息对应的接入资源，执行随机接入。
图8示出了一种随机接入方法的流程示意图，如图8所示，该方法可以包括：
S301、获取第一网络切片信息；
S302、判断邻区是否支持第一网络切片信息；若支持，则执行S303-S305；否则，执行S308，或者，S306-308；
S303、基于第一网络切片信息执行小区重选，得到重选结果；重选结果用于表征是否从当前驻留小区或邻区中得到支持第一网络切片信息且满足S准则的第一小区；
在本申请实施例中，终端设备可以确定当前驻留小区或邻区中是否存在支持第一网络切片信息且满足S准则的小区；如果存在，则可以从支持第一网络切片信息且满足S准则的小区中选择一个作为第一小区，重选结果为重选成功；如果不存在支持第一网络切片信息且满足S准则的小区，则可以确定重选结果为重选失败。
S304、在重选结果为重选成功的情况下，通过第一小区的与第一网络切片信息对应的网络切片资源，向第一小区发起随机接入；
S305、在重选结果为重选失败的情况下，通过当前驻留小区的legacy资源或预留切片资源，向当前驻留小区发起随机接入；
S306、判断当前驻留小区是否支持第一网络切片信息；若支持，则执行S307；否则，执行S308；
S307、通过当前驻留小区的与第一网络切片信息对应的网络切片资源，向当前驻留小区发起随机接入；
S308、通过当前驻留小区的legacy资源或预留切片资源，向当前驻留小区发起随机接入。
在本申请实施例中，终端设备在获取第一网络切片信息的情况下，可以先判断邻区是否支持第一网络切片信息，在邻区支持第一网络切片信息的情况下，基于第一网络切片信息，执行小区重选，在重选结果为从当前驻留小区或邻区中选择到支持第一网络切片信息且满足S准则的第一小区，即重选成功的情况下，通过第一小区支持的第一网络切片信息对应的网络切片资源，向第一小区发起随机接入；在小区重选失败的情况下，通过当前驻留小区的legacy资源或者预留切片资源，向当前驻留小区发起随机接入；在邻区不支持的情况下，根据当前驻留小区是否支持第一网络切片选择接入资源，向当前驻留小区发起随机接入；如此，实现了基于第一网络切片信息，执行随机接入，从而提高了网络对终端设备需求的网络切片的支持效果。
本申请实施例提供一种随机接入方法，该方法可以包括：S401-S404。
S401、获取第一网络切片信息；
S402、判断当前驻留小区是否支持第一网络切片信息；若支持，则执行S403；若不支持，则执行404；
S403、通过当前驻留小区的与第一网络切片信息对应的网络切片资源，向当前驻留小区发起随机接入；
S404、通过当前驻留小区的legacy资源或预留切片资源，向当前驻留小区发起随机接入。
在本申请实施例中，终端可以根据当前驻留小区是否支持第一网络切片信息，来确定采用何种接入资源向当前驻留小区发起随机接入；提高了当前驻留小区对终端需求的网络切片的支持效果。
本申请实施例提供一种随机接入方法，该方法可以包括：S501-S504。
S501、获取第一网络切片信息；
S502、判断当前驻留小区是否支持第一网络切片信息；若支持，则执行S503；否则，执行S504；
S503、通过当前驻留小区的与第一网络切片信息对应的网络切片资源，向第一小区发起随机接入；
S504、基于第一网络切片信息执行小区重选，得到重选结果；重选结果用于表征是否从邻区中得到支持第一网络切片信息且满足信道质量条件，如S准则的第一小区；
在本申请实施例中，小区重选成功，表示邻区支持第一网络切片信息且满足信道质量条件，如S准则，重选的第一小区为邻区。
S505、在重选结果为重选成功的情况下，通过第一小区的与第一网络切片信息对应的网络切片资源，向第一小区发起随机接入；
S506、在重选结果为重选失败的情况下，通过当前驻留小区的legacy资源或预留切片资源，向当前驻留小区发起随机接入。
在本申请实施例中，终端可以在当前驻留小区支持第一网络切片信息的情况下，优先采用当前驻留小区的与第一网络切片信息对应的网络切片资源，向当前驻留小区发起随机接入；在当前驻留小区不支持第一网络切片信息的情况下，再从邻区中进行小区重选，在从邻区中重选到第一小区的情况下，采用第一小区的与第一网络切片信息对应的网络切片资源，向第一小区发起随机接入，在从邻区中没有重选到第一小区的情况下，采用当前驻留小区的legacy资源或预留切片资源，向当前驻留小区发起随机接入。
图9为本申请实施例提供的一种可选的终端设备的结构组成示意图，如图9所示，所述终端设备19包括：
随机接入模块1901，用于基于需求的第一网络切片信息，执行随机接入。
在一些实施例中，所述随机接入模块1901，还用于基于所述第一网络切片信息进行小区重选，得到第一小区；所述第一小区为支持所述第一网络切片信息的当前驻留小区或邻区；对所述第一小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于基于所述第一小区的与所述第一网络切片信息对应的接入资源，对所述第一小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于基于所述第一网络切片信息进行小区重选；在所述小区重选失败的情况下，对所述当前驻留小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于基于所述第一网络切片信息进行 小区重选；在所述小区重选失败的情况下，基于所述当前驻留小区的传统legacy资源或所述当前小区的预留切片资源，对所述当前驻留小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于基于所述第一网络切片信息进行小区重选；在所述小区重选失败的情况下，根据传统legacy小区重选准则，得到第二小区；对所述第二小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于所述第一小区为支持所述第一网络切片信息，且满足第一预设条件的当前驻留小区或邻区；所述第一预设条件包括以下至少之一：所述第一小区满足S准则；所述第一小区的信道质量高于信道质量门限；所述第一小区的信道质量高于信道质量门限的持续时长大于或等于第一时长；所述第一小区支持所述第一网络切片信息的优先级最高；所述第一小区的频点优先级最高。
在一些实施例中，所述随机接入模块1901，还用于在以下至少一种情况下，基于所述第一网络切片信息进行小区重选：当前驻留小区不支持所述第一网络切片信息；邻区支持所述第一网络切片信息；邻区支持所述第一网络切片信息的优先级高于当前驻留小区支持所述第一网络切片信息优先级；所述第一网络切片信息对应的业务为终端触发MO业务或终端触发数据MO data业务；所述第一网络切片信息不是允许的网络切片信息；获取到所述第一网络切片信息；在执行随机接入之前；或，在发送MSG1之前；或，在发送MSGA之前，获取到所述第一网络切片信息；接收到重选指示信息；所述重选指示信息用于指示所述终端设备设备进行小区重选；所述终端设备支持所述小区重选。
在一些实施例中，所述重选指示信息包括以下至少一个：所述第一网络切片信息；协议数据单元会话建立请求信息；业务建立请求信息；业务请求信息；服务请求信息；随机接入指示信息。
在一些实施例中，所述随机接入模块1901，还用于在获取到需求的第二网络切片信息之后，获取到所述第一网络切片信息。
在一些实施例中，所述第一网络切片信息包括一个网络切片信息。
在一些实施例中，所述所述第一网络切片信息对应的业务为终端触发MO业务或终端触发数据MO data业务，包括：所述第一网络切片信息对应的业务为终端触发MO业务，且所述当前驻留小区支持所述MO业务，以及所述邻区支持所述MO业务；或者，所述第一网络切片信息对应的业务为MO data业务，且所述当前驻留小区支持所述MO data业务，以及所述邻区支持所述MO data业务。
在一些实施例中，所述业务为终端触发MO业务。
在一些实施例中，所述随机接入模块1901，还用于在所述终端设备支持所述小区重选的情况下，基于所述第一网络切片信息进行所述小区重选。
在一些实施例中，所述随机接入模块1901，还用于在当前驻留小区不支持所述第一网络切片信息的情况下，所述终端设备基于所述当前驻留小区的legacy资源或所述当前小区的预留切片资源，对所述当前驻留小区发起随机接入。
在一些实施例中，所述随机接入模块1901，还用于在当前驻留小区不支持所述第一网络切片信息的情况下，向网络发送切片需求信息；所述切片需求信息包含所述当前驻留小区不支持所述第一网络切片信息的指示信息或所述第一网络切片信息。
在一些实施例中，所述随机接入模块1901，还用于获取所述第一网络切片信息；基于所述第一网络切片信息，执行随机接入。
在一些实施例中，所述随机接入模块1901，还用于在所述终端设备向网络设备发送MSG1或MSGA之前，或者，在触发随机接入过程之前，获取所述第一网络切片信息。
图10为本申请实施例提供的一种可选的终端设备的结构组成示意图，如图10所示，终端设备20包括存储器2001、处理器2002及存储在存储器2001上并可在处理器2002上运行的计算机程序；其中，处理器用于运行所述计算机程序时，执行如前述实施例中随机接入方法。
可以理解，终端设备20还包括总线系统2003；终端设备20中的各个组件通过总线系统2003耦合在一起。可理解，总线系统2003用于实现这些组件之间的连接通信。总线系统2003除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
可以理解，本实施例中的存储器可以是易失性存储器或非易失性存储器，也可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read Only Memory，ROM)、可编程只读存储器(Programmable Read-Only Memory，PROM)、可擦除可编程只读存储器(Erasable Programmable Read-Only Memory，EPROM)、电可擦除可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、磁性随机存取存储器(Ferromagnetic Random Access Memory，FRAM)、快闪存储器(Flash Memory)、磁表面存储器、光盘、或只读光盘(Compact Disc Read-Only Memory，CD-ROM)；磁表面存储器可以是磁盘存储器或磁带存储器。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static Random Access Memory，SRAM)、同步静态随机存取存储器(Synchronous Static Random Access Memory，SSRAM)、动态随机存取存储器(Dynamic Random Access Memory，DRAM)、同步动态随机存取存储器(Synchronous Dynamic Random Access Memory，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate Synchronous Dynamic Random Access Memory，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced Synchronous Dynamic Random Access Memory，ESDRAM)、同步连接动态随机存取存储器(SyncLink Dynamic Random Access Memory，SLDRAM)、直接内存总线随机存取存储器(Direct Rambus Random Access Memory，DRRAM)。本申请实施例描述的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
上述本申请实施例揭示的方法可以应用于处理器中，或者由处理器实现。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、DSP，或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件等。处理器可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者任何常规的处理器等。结合本申请实施例所公开的方法的步骤，可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于存储介质中，该存储介质位于存储器，处理器读取 存储器中的信息，结合其硬件完成前述方法的步骤。
本申请实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，在计算机可读存储介质位于终端设备时，该计算机程序被处理器执行时实现本申请实施例随机接入方法中的步骤。
在本申请所提供的几个实施例中，应该理解到，所揭露的设备和方法，可以通过其它的方式实现。以上所描述的设备实施例仅仅是示意性的，例如，所述模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，如：多个模块或组件可以结合，或可以集成到另一个系统，或一些特征可以忽略，或不执行。另外，所显示或讨论的各组成部分相互之间的耦合、或直接耦合、或通信连接可以是通过一些接口，设备或模块的间接耦合或通信连接，可以是电性的、机械的或其它形式的。
工业实用性
本申请实施例中，终端设备基于需求的第一网络切片信息，执行随机接入；如此，终端设备可以基于需求的第一网络切片信息，采用合适的随机接入资源，执行随机接入，从而提高了网络设备对随机接入的性能的支持效果。

Claims (20)

  1. 一种随机接入方法，包括：
    终端设备基于需求的第一网络切片信息，执行随机接入。
  2. 根据权利要求1所述的方法，其中，所述终端设备基于需求的第一网络切片信息，执行随机接入，包括：
    所述终端设备基于所述第一网络切片信息进行小区重选，得到第一小区；所述第一小区为支持所述第一网络切片信息的当前驻留小区或邻区；
    所述终端设备对所述第一小区发起随机接入。
  3. 根据权利要求2所述的方法，其中，所述终端设备对所述第一小区发起随机接入，包括：
    所述终端设备基于所述第一小区的与所述第一网络切片信息对应的接入资源，对所述第一小区发起随机接入。
  4. 根据权利要求1所述的方法，其中，所述终端设备基于需求的第一网络切片信息，执行随机接入，包括：
    所述终端设备基于所述第一网络切片信息进行小区重选；
    在所述小区重选失败的情况下，对当前驻留小区发起随机接入。
  5. 根据权利要求1所述的方法，其中，所述终端设备基于需求的第一网络切片信息，执行随机接入，包括：
    所述终端设备基于所述第一网络切片信息进行小区重选；
    在所述小区重选失败的情况下，基于所述当前驻留小区的传统legacy资源或所述当前驻留小区的预留切片资源，对所述当前驻留小区发起随机接入。
  6. 根据权利要求1所述的方法，其中，所述终端设备基于需求的第一网络切片信息，执行随机接入包括：
    所述终端设备基于所述第一网络切片信息进行小区重选；
    在所述小区重选失败的情况下，根据传统legacy小区重选准则，得到第二小区；
    对所述第二小区发起随机接入。
  7. 根据权利要求2所述的方法，其中，所述第一小区为支持所述第一网络切片信息，且满足第一预设条件的当前驻留小区或邻区；所述第一预设条件包括以下至少之一：
    所述第一小区满足S准则；
    所述第一小区的信道质量高于信道质量门限；
    所述第一小区的信道质量高于信道质量门限的持续时长大于或等于第一时长；
    所述第一小区支持所述第一网络切片信息的优先级最高；
    所述第一小区的频点优先级最高。
  8. 根据权利要求2-7任一项所述的方法，其中，在以下至少一种情况下，所述终端设备基于所述第一网络切片信息进行小区重选：
    当前驻留小区不支持所述第一网络切片信息；
    邻区支持所述第一网络切片信息；
    邻区支持所述第一网络切片信息的优先级高于当前驻留小区支持所述第一网络切片信息的优先级；
    所述第一网络切片信息对应的业务为终端触发MO业务或终端触发数据MO data业务；
    所述第一网络切片信息不是允许的网络切片信息；
    获取到所述第一网络切片信息；
    在执行随机接入之前；或，在发送MSG1之前；或，在发送MSGA之前，获取到所述第一网络切片信息；
    接收到重选指示信息；所述重选指示信息用于指示所述终端设备进行小区重选；
    所述终端设备支持所述小区重选。
  9. 根据权利要求8所述的方法，其中，所述重选指示信息包括以下至少一个：
    所述第一网络切片信息；
    协议数据单元会话建立请求信息；
    业务建立请求信息；
    业务请求信息；
    服务请求信息；
    随机接入指示信息。
  10. 根据权利要求1-8任一项所述的方法，其中，所述获取到所述第一网络切片信息，包括：在获取到需求的第二网络切片信息之后，获取到所述第一网络切片信息。
  11. 根据权利要求1-9任一项所述的方法，其中，所述第一网络切片信息包括一个网络切片信息。
  12. 根据权利要求8所述的方法，其中，所述所述第一网络切片信息对应的业务为终端触发MO业务或终端触发数据MO data业务，包括：
    所述第一网络切片信息对应的业务为终端触发MO业务，且所述当前驻留小区支持所述MO业务，和/或，所述邻区支持所述MO业务；或者，
    所述第一网络切片信息对应的业务为MO data业务，且所述当前驻留小区支持所述MO data业务，和/或，所述邻区支持所述MO data业务。
  13. 根据权利要求9所述的方法，其中，所述业务为终端触发MO业务。
  14. 根据权利要求1所述的方法，其中，所述终端设备基于需求的第一网络切片信息，执行随机接入，包括：
    在当前驻留小区不支持所述第一网络切片信息的情况下，所述终端设备基于所述当前驻留小区的legacy资源或所述当前小区的预留切片资源，对所述当前驻留小区发起随机接入。
  15. 根据权利要求1-14任一项所述的方法，其中，所述方法还包括：
    在当前驻留小区不支持所述第一网络切片信息的情况下，向网络发送切片需求信息；所述切片需求信息包含所述当前驻留小区不支持所述第一网络切片信息的指示信息或所述第一网络切片信息。
  16. 根据权利要求1-15任一项所述方法，其中，所述终端设备基于需求的网络切 片信息，执行随机接入，还包括：
    所述终端设备获取所述第一网络切片信息；
    所述终端设备基于所述第一网络切片信息，执行随机接入。
  17. 根据权利要求16所述的方法，其中，所述终端设备获取所述第一网络切片信息包括：
    在所述终端设备向网络设备发送MSG1或MSGA之前，或者，在触发随机接入过程之前，获取所述第一网络切片信息。
  18. 一种终端设备，包括：
    随机接入模块，用于基于需求的第一网络切片信息，执行随机接入。
  19. 一种终端设备，包括：处理器和用于存储能够在处理器上运行的计算机程序的存储器；
    其中，所述处理器用于运行所述计算机程序时，执行权利要求1至17任一项所述方法的步骤。
  20. 一种计算机可读存储介质，存储有计算机程序，当所述计算机程序被一个或多个处理器执行的时候，所述处理器执行所述的权利要求1至17任一项所述的方法的步骤。
PCT/CN2021/091963 2021-05-06 2021-05-06 随机接入方法、终端设备和计算机可读存储介质 WO2022233006A1 (zh)

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