WO2021163859A1 - 通信方法及通信装置 - Google Patents

通信方法及通信装置 Download PDF

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Publication number
WO2021163859A1
WO2021163859A1 PCT/CN2020/075598 CN2020075598W WO2021163859A1 WO 2021163859 A1 WO2021163859 A1 WO 2021163859A1 CN 2020075598 W CN2020075598 W CN 2020075598W WO 2021163859 A1 WO2021163859 A1 WO 2021163859A1
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WIPO (PCT)
Prior art keywords
identifier
terminal device
network slice
access network
slice
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PCT/CN2020/075598
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English (en)
French (fr)
Inventor
罗海燕
戴明增
曾清海
孙飞
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华为技术有限公司
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.)
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP20920221.7A priority Critical patent/EP4099772A4/en
Priority to CN202080096884.9A priority patent/CN115136681A/zh
Priority to PCT/CN2020/075598 priority patent/WO2021163859A1/zh
Publication of WO2021163859A1 publication Critical patent/WO2021163859A1/zh
Priority to US17/890,081 priority patent/US20220394608A1/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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/302—Route determination based on requested QoS
    • H04L45/306—Route determination based on the nature of the carried application
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/12—Interfaces between hierarchically different network devices between access points and access point controllers

Definitions

  • This application relates to the field of communication, and more specifically, to a communication method and communication device.
  • a network slice meets the connection communication service requirements of a certain type or use case.
  • a 5G system can be composed of a large number of network slices that meet different connection capabilities.
  • the introduction of the concept of network slicing divides the operator's physical network into multiple virtual networks. Each virtual network is divided according to different service quality requirements, such as delay, bandwidth, security, and reliability, to flexibly respond to different network application scenarios.
  • service quality requirements such as delay, bandwidth, security, and reliability
  • network slicing is an end-to-end concept.
  • a network slicing includes a radio access network (RAN) part and a core network part.
  • RAN radio access network
  • Different network slices can be characterized by network slice identification, for example, single network slice selection assistance information (S-NSSAI).
  • S-NSSAI single network slice selection assistance information
  • Each S-NSSAI is composed of a slice/service type (SST) and a slice differentiator (SD), where the SST is used to distinguish services, and the SD is used to distinguish tenants.
  • the current access management function (AMF) of the core network sends allowed single network slice selection auxiliary information (allowed S-NSSAIs) to the terminal device, so that the terminal device can determine which slice services can be enjoyed.
  • the current network slicing defined by the 3rd generation partnership project (3GPP) cannot meet the communication requirements of terminal devices.
  • the present application provides a communication method and communication device to meet the communication requirements of terminal equipment.
  • a communication method is provided.
  • the method can be executed by a first access network device, or a device in the first access network device (for example, one of a chip, a processor, or a chip system).
  • the method includes: the first access network device broadcasts a first identifier, the first identifier is used to identify the information of the first access network network slice; the first access network device sends radio resource control RRC to the terminal device Message, the RRC message includes information of at least one first network slice corresponding to the first identifier.
  • the first access network device sends the information of at least one first network slice corresponding to the first identifier to the terminal device through the RRC message, so that the terminal device can adapt to the communication requirements of the terminal device regardless of whether the terminal device moves in the TA area. Also, here, the first access network device broadcasts the first identifier, and sends information about at least one first network slice corresponding to the first identifier through an RRC message, and there is no need to include at least one corresponding to the first identifier in the broadcast message. The information of the first network slice helps to save broadcast overhead.
  • the first access network device may actively send the information of the at least one first network slice corresponding to the first identifier to the terminal device, or may send it based on the request message of the terminal device.
  • the method further includes: the first access network device receives a request message from the terminal device, the request message It is used to request information of at least one first network slice corresponding to the first identifier.
  • the first access network device may, after receiving the request message of the terminal device, send the information of at least one first network slice corresponding to the first identifier to the terminal device based on the request message, so that it may send information related to the first network slice in a targeted manner.
  • Information identifying the corresponding at least one first network slice may be used to send information of the at least one first network slice corresponding to the first identifier.
  • the first access network device may also send the network slice information supported by the neighboring cell to the terminal device.
  • the RRC message further includes a second identifier, and information about at least one second network slice corresponding to the second identifier, where the second identifier is used to identify information about the network slice of the second access network. In this way, after the terminal device moves to the coverage area of the second access network device, there is no need to request the second access network device for the information of the at least one second network slice corresponding to the second identifier.
  • the access network devices can exchange their respective broadcast identifiers and network slice information corresponding to the identifiers.
  • the method further includes: the first access network device receives a first message from a second access network device, the first message includes the second identifier, and the Information of at least one second network slice corresponding to the second identifier.
  • the first access network device obtains the second message from the second access network device, so that the terminal device can obtain information of at least one second network slice corresponding to the second identifier of the second access network device in advance, thereby It is possible to reduce the process of the terminal device triggering the request for information of at least one second network slice corresponding to the second identifier, which helps to save the power consumption of the terminal device.
  • the method further includes: the first access network device sends information of at least one first network slice corresponding to the first identifier to the second access network device.
  • the first access network device sends the information of at least one first network slice corresponding to the first identifier to the second access network device, so that the terminal device in the coverage area of the second access network device can obtain the first access in advance.
  • the information of the at least one first network slice corresponding to the first identifier of the network access device can reduce the process of triggering the terminal device to apply for the information of the at least one first network slice corresponding to the first identifier, which helps save terminals The power consumption of the device.
  • a communication method is provided.
  • the method can be executed by a terminal device or a device in the terminal device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes :
  • the terminal device acquires a first identifier, the first identifier is used to identify information about the network slice of the first access network;
  • the terminal device receives an RRC message from the first access network device, and the RRC message includes the information corresponding to the first identifier Information about at least one first network slice.
  • the terminal device receives the first identifier sent by the first access network device by broadcasting, and obtains information of at least one first network slice corresponding to the first identifier through the RRC message, so that no matter whether the terminal device moves in the TA area , Both can adapt to the communication requirements of the terminal equipment, and help to save the broadcast overhead of the first access network equipment.
  • the method before the terminal device receives the RRC message from the first access network device, the method further includes: the terminal device sends a request message to the first access network device, and the request message is used to request communication with the first access network device.
  • Information of at least one first network slice corresponding to the first identifier may actively request the information of the at least one first network slice corresponding to the identifier from the first access network device, so that the information of the at least one first network slice corresponding to the first identifier may be acquired in a targeted manner.
  • the RRC message further includes a second identifier, and information about at least one second network slice corresponding to the second identifier, and the second identifier is used to identify information about the network slice of the second access network.
  • the terminal device moves to the coverage area of the second access network device, it can obtain the information of at least one second network slice corresponding to the second identifier of the second access network device in advance, thereby reducing terminal device triggering
  • the process of applying for the information of at least one second network slice corresponding to the second identifier helps to save the power consumption of the terminal device.
  • a communication method is provided.
  • the method can be executed by a terminal device or a device in the terminal device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes : The terminal device receives a paging message from the network device, the paging message includes the information of the first network slice; if the cell where the terminal device is currently located does not support the first network slice, the terminal device performs cell reselection, there is Help the terminal equipment to select the appropriate cell.
  • the terminal device performing cell reselection includes: the terminal device performs cell reselection according to a first mapping relationship, and the first mapping relationship includes information about the first network slice, and the second network For slice information, there is a remapping relationship between the information of the first network slice and the information of the second network slice.
  • the first mapping relationship is used to characterize the mapping relationship between the network slice and the network slice. For the case where the terminal device cannot find the cell or the access network device that supports the first network slice in the paging message, if the terminal device has received the first mapping relationship of the network slice remapping, the first mapping relationship can be used for further Cell reselection helps increase the probability of selecting a suitable cell.
  • the terminal device performing cell reselection according to the first mapping relationship includes: if the cell where the terminal device is currently located supports the second network slice, the terminal device initiates a random access procedure in the cell where the terminal device is currently located; The cell where the device is currently located does not support the second network slice, and the terminal device selects a cell that supports the second network slice. In this way, the terminal device determines whether the current cell supports the second network slice, which helps to increase the probability of selecting a suitable cell.
  • the method further includes: the terminal device sends a second message to the network device (access network device or core network element), the second message It includes the information of the first network slice and the information of the second network slice, or the second message includes the information of the second network slice. That is, if the terminal device selects a cell that supports the second network slice, it can inform the access network device or the core network element of the information of the second network slice, so that the access network device or the core network element can learn about the terminal The cell selected by the device.
  • the method further includes: the terminal device sends a third message to the network device, and the third message is used to notify the terminal device that the cell selection fails.
  • the terminal device fails to select a cell may include: the cell selection fails using the first mapping relationship. That is, if the terminal device fails to select a cell, it can notify the access network device or the core network element that the terminal device fails to select the cell, so that the access network device or the core network element learns that the terminal device fails to select the cell.
  • the method further includes: the terminal device obtains the information of the network slice supported by the current cell.
  • the information of the network slice supported by the current cell may include information of at least one network slice.
  • the terminal device receives the information of the network slice supported by the current cell sent by the first access network device, so that the judgment can be made in combination with the information of the network slice supported by the current cell.
  • a communication method is provided.
  • the method can be executed by a core network element or a device (such as one or more of a chip, a processor, or a chip system) in the core network element.
  • the method includes: the core network element determines the priority of each network slice in at least one network slice; the core network element sends a fourth message, the fourth message including the identifier of each network slice and the each Priority corresponding to each network slice.
  • the core network element may send the identifier of each network slice and the priority corresponding to each network slice to the terminal device, so that the terminal device can select a more suitable cell.
  • the fourth message is a non-access stratum message sent by the core network element to the terminal device.
  • a communication method is provided.
  • the method can be executed by a terminal device or a device in the terminal device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes :
  • the terminal device obtains priority information of each network slice in at least one network slice; the terminal device performs cell selection or cell reselection according to the priority information of each network slice.
  • the terminal device may obtain the identifier of each network slice sent by the core network element and the priority corresponding to each network slice and send it to the terminal device, so as to select a more suitable cell.
  • the terminal device if the terminal device is in the first cell, wherein the terminal device performs cell selection or cell reselection according to the priority information of each network slice, including: the terminal device is in the first cell.
  • the first network slice is selected from the at least one network slice, and the priority of the first network slice is the highest among the at least one network slice; it is determined whether the first cell supports the first network slice; If the cell does not support the first network slice, perform a cell search to obtain a second cell, and determine whether the second cell supports the first network slice; support the first network in the second cell In the case of slicing, put the second cell into the candidate cell set, and continue the search and perform the aforementioned actions until no new cell can be found; in the case that the candidate cell set is not empty, the terminal device chooses to camp on the candidate cell The cell with the best signal (for example, the highest received power or the highest signal strength) in the set; in the case that the set of candidate cells is empty, the terminal device selects a second network slice, and the priority of
  • Priority of the first network slice continue to perform cell search until a suitable cell is selected; if the first cell supports the first network slice, the terminal device continues to camp on the first cell.
  • the first cell is the cell where the terminal device currently resides, and the terminal device gives priority to the first cell. In this way, for the case where the terminal device is in the camping cell, the terminal device can also select a more suitable cell in combination with the priority corresponding to the network slice.
  • the terminal device performs cell selection or cell reselection according to the priority information of each network slice, including: the terminal device selects the first network in the at least one network slice Slice, the priority of the first network slice is the highest among the at least one network slice; the terminal device performs a cell search to obtain a third cell; determines whether the third cell supports the first network slice; In the case that the third cell supports the first network slice, the terminal device puts the third cell into the candidate cell set, and continues to search and perform the foregoing actions until a new cell cannot be found.
  • the terminal device selects to camp on the cell with the best signal (for example, the highest received power or the highest signal strength) in the candidate cell set; in the case that the candidate cell set is empty.
  • the terminal device selects a second network slice, the priority of the second network slice is lower than the priority of the first network slice, and continues to perform cell search until a suitable cell is selected. In this way, for the case where the terminal device is not in the camping cell, the terminal device can also select a more suitable cell in combination with the priority corresponding to the network slice.
  • the acquiring, by the terminal device, priority information of each network slice in at least one network slice includes: the terminal device receiving a fourth message from a core network element, where the fourth message includes each The identifier of the network slice and the priority corresponding to each network slice, so that the priority corresponding to each network slice can be used for cell selection or reselection.
  • a communication method is provided.
  • the method can be executed by an access network device or a device in the access network device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes: the access network device determines the priority of each network slice in at least one network slice for a first frequency point; the access network device sends a fifth message, and the fifth message includes the first frequency. Point, the identifier of each network slice, and the priority corresponding to each network slice.
  • the access network device may determine the priority of each network slice for at least one network slice corresponding to each frequency point, and send the priority of each network slice to the terminal device, so that the terminal device can use the network slice.
  • the priority is to select a more suitable cell.
  • a communication method is provided.
  • the method can be executed by an access network device or a device in the access network device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes: the access network device determines the priority of each frequency point in at least one frequency point for the first network slice; the access network device sends a sixth message, and the sixth message includes the first The identifier of the network slice, the identifier of each frequency point, and the priority corresponding to each frequency point.
  • the access network device can determine the priority of each frequency point for at least one frequency point corresponding to each network slice, and send the priority of each frequency point to the terminal device, so that the terminal device can use the frequency point.
  • the priority is to select a more suitable cell.
  • a communication method is provided.
  • the method can be executed by a terminal device or a device in the terminal device (for example, one or more of a chip, a processor, or a chip system).
  • the method includes :
  • the terminal device acquires the priority of each frequency point in at least one frequency point of the first network slice; the terminal device performs cell search on the first frequency point, and the first frequency point is the at least one frequency point.
  • the terminal device may select a first frequency point among the at least one frequency point according to the priority of each frequency point, where the first frequency point is the frequency point with the highest priority among the at least one frequency point .
  • the terminal device performs a cell search on the first frequency point, which helps to select a more suitable cell.
  • the method further includes: if the terminal device does not search for a cell on the first frequency point, the terminal device performs a cell search on a second frequency point, and the first frequency point is The priority of the second frequency point is lower than the first frequency point, so that a suitable frequency point is selected for cell search.
  • the first frequency point is the highest priority frequency point
  • the second frequency point is the second highest priority frequency point.
  • the acquiring, by the terminal device, the priority of each frequency point in at least one frequency point of the first network slice includes: receiving, by the terminal device, a sixth message from the network device, where the sixth message includes The identifier of the first network slice, the identifier of each frequency point, and the priority corresponding to each frequency point.
  • the terminal device learns the priority corresponding to each frequency point from the network device, so that the priority corresponding to each frequency point can be used for cell selection or reselection, which helps to select a suitable cell.
  • a communication device in a ninth aspect, includes a module for executing the method in the foregoing first aspect or any possible implementation of the first aspect; or, including a module for executing the foregoing sixth aspect or the first aspect.
  • a communication device in a tenth aspect, includes a module for executing the method in the second aspect or any possible implementation of the second aspect; or, including a module for executing the third aspect or the first aspect.
  • a communication device in an eleventh aspect, includes a module for executing the foregoing fourth aspect or the method in any possible implementation manner of the fourth aspect.
  • a communication device including a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or to transfer signals from the processor It is sent to other communication devices other than the communication device, and the processor is used to implement the foregoing first aspect or the method in any possible implementation manner of the first aspect through logic circuits or execution code instructions; or, to implement the foregoing first aspect.
  • the method in any possible implementation manner of the sixth aspect or the sixth aspect; or, used to implement the method in any possible implementation manner of the aforementioned seventh aspect or the seventh aspect.
  • a communication device including a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transfer signals from the processor The signal is sent to other communication devices other than the communication device, and the processor is used to implement the foregoing second aspect or the method in any possible implementation manner of the second aspect through logic circuits or execution code instructions; or, to implement the foregoing
  • the third aspect or the method in any possible implementation manner of the third aspect; or, for implementing the method in any possible implementation manner of the foregoing fifth aspect or the fifth aspect; or, for implementing the foregoing eighth aspect or The method in any possible implementation of the eighth aspect.
  • a communication device including a processor and an interface circuit, the interface circuit is used to receive signals from other communication devices other than the communication device and transmit them to the processor or transfer signals from the processor The signal is sent to another communication device other than the communication device, and the processor is used to implement the foregoing fourth aspect or any possible implementation method of the fourth aspect through a logic circuit or executing code instructions.
  • a computer-readable storage medium stores a computer program or instruction.
  • the computer program or instruction is executed, any of the first to eighth aspects is implemented. On the one hand and the method in any possible implementation.
  • a computer program product containing instructions is provided, when the instructions are executed, any one of the first to eighth aspects and the method in any possible implementation manner thereof are implemented.
  • a communication chip in which instructions are stored, which when running on a computer device, cause the communication chip to execute any one of the first to eighth aspects and any possible implementations thereof The method in the way.
  • a communication system which includes one or more of the aforementioned communication device of the twelfth aspect, the communication device of the thirteenth aspect, and the communication device of the fourteenth aspect.
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which an embodiment of the present application may be applied;
  • Fig. 2 is a schematic interaction diagram of a communication method according to an embodiment of the present application.
  • Fig. 3 is an example diagram of a slice area according to an embodiment of the present application.
  • Fig. 4 is another example diagram of a slice area according to an embodiment of the present application.
  • FIG. 5 is a diagram of an example of interaction of the communication method according to an embodiment of the present application.
  • Fig. 6 is a diagram of another example of interaction of the communication method according to an embodiment of the present application.
  • FIG. 7 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another communication method according to an embodiment of the present application.
  • Fig. 9 is a schematic block diagram of a device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of another device according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of an access network device provided by an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • multiple can be understood as “at least two” or “two or more”; “multiple” can be understood as “at least two” or “two or more” .
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • FIG. 1 is a schematic diagram of the architecture of a communication system to which an embodiment of the present application may be applied.
  • the communication system includes a core network device 110, an access network device 120, and at least one terminal device (the terminal device 130 and the terminal device 140 in FIG. 1).
  • the terminal device is connected to the access network device in a wireless manner
  • the access network device is connected to the core network device in a wireless or wired manner.
  • the core network equipment and the access network equipment can be separate and different physical equipment, or the functions of the core network equipment and the logical functions of the access network equipment can be integrated on the same physical equipment, or they can be integrated on the same physical equipment.
  • the function of part of the core network equipment and the function of part of the access network equipment are introduced.
  • the terminal device can be a fixed location, or it can be movable.
  • Fig. 1 is only a schematic diagram.
  • the communication system may also include other network equipment, such as wireless relay equipment and wireless backhaul equipment, which are not shown in Fig. 1.
  • the embodiments of the present application do not limit the number of core network equipment, access network equipment, and terminal equipment included in the communication system.
  • Access network equipment is the access equipment that terminal equipment accesses to the communication system in a wireless manner. It can be radio access network (RAN) equipment, base station NodeB, evolved base station (evolved NodeB, eNB), Base station (gNB), transmission point in 5G communication system, base station in future communication system or access node in wireless fidelity (Wi-Fi) system, one or a group of base stations in 5G system (including Multiple antenna panels) Antenna panels, or, can also be network nodes that constitute a gNB or transmission point, such as a baseband unit (BBU), a centralized unit (CU), or a distributed unit (distributed unit). , DU) and so on.
  • RAN radio access network
  • BBU baseband unit
  • CU centralized unit
  • distributed unit distributed unit
  • gNB may include CU and DU.
  • the gNB may also include an active antenna unit (AAU).
  • AAU active antenna unit
  • the CU implements some of the functions of the gNB, and the DU implements some of the functions of the gNB.
  • the CU is responsible for processing high-level protocols and services to implement radio resource control (radio resource control, RRC), service data adaptation protocol (SDAP) layer functions, and packet data convergence layer protocol (packet data convergence protocol). , PDCP) layer function.
  • RRC radio resource control
  • SDAP service data adaptation protocol
  • PDCP packet data convergence layer protocol
  • the DU is responsible for processing low-level protocols and services to implement the functions of the radio link control (RLC) layer, media access control (MAC) layer, and physical (PHY) layer.
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • AAU realizes some physical layer processing functions, radio frequency processing and related functions of active antennas. Since the information of the RRC layer will eventually become the information of the PHY layer, or be transformed from the information of the PHY layer, under this architecture, high-level signaling, such as RRC layer signaling, can also be considered to be sent by the DU , Or, sent by DU and AAU.
  • the access network device may be a device including one or more of the CU node, the DU node, and the AAU node.
  • the CU can be used as a network device in an access network, or as a network device in a core network (core network, CN), which is not limited in this application.
  • the access network device provides services for the cell, and the terminal device communicates with the cell through transmission resources (for example, frequency domain resources, or spectrum resources) allocated by the access network device.
  • the cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.), and may also belong to a base station corresponding to a small cell (small cell).
  • the small cells here may include: metro cells, micro cells, pico cells, femto cells, and so on. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • a terminal device may also be called a terminal, a user equipment (UE), a mobile station (MS), a mobile terminal (MT), and so on.
  • Terminal devices can be mobile phones, tablets, computers with wireless transceiver functions, virtual reality (VR) terminal devices, augmented reality (AR) terminal devices, industrial control (industrial control) Wireless terminals in ), wireless terminals in self-driving (self-driving), wireless terminals in remote medical surgery, wireless terminals in smart grid, and wireless terminals in transportation safety (transportation safety) Terminals, wireless terminals in smart cities, wireless terminals in smart homes, and so on.
  • the embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal device.
  • Access network equipment and terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle-mounted; they can also be deployed on water; they can also be deployed on airborne aircraft, balloons, and satellites.
  • the embodiment of the present application does not limit the application scenarios of the access network device and the terminal device.
  • the embodiments of the present application may be applicable to downlink signal transmission, may also be applicable to uplink signal transmission, and may also be applicable to device-to-device (D2D) signal transmission.
  • the sending device is an access network device, and the corresponding receiving device is a terminal device.
  • the sending device is a terminal device, and the corresponding receiving device is an access network device.
  • D2D signal transmission the sending device is a terminal device, and the corresponding receiving device is also a terminal device.
  • the communication between the access network equipment and the terminal equipment and between the terminal equipment and the terminal equipment can be through the licensed spectrum (licensed spectrum), or through the unlicensed spectrum (unlicensed spectrum), or through the licensed spectrum and the unlicensed spectrum at the same time Spectrum to communicate.
  • Communication between access network equipment and terminal equipment and between terminal equipment and terminal equipment can be through the frequency spectrum below 6 gigahertz (gigahertz, GHz), or through the frequency spectrum above 6G, and can also use the frequency below 6G at the same time
  • the frequency spectrum communicates with the frequency spectrum above 6G.
  • the embodiment of the present application does not limit the spectrum resource used between the access network device and the terminal device.
  • the network devices all refer to the access network devices.
  • the terminal device or network device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer.
  • the hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and memory (also referred to as main memory).
  • the operating system can be any one or more computer operating systems that implement business processing through processes, for example, Linux operating systems, Unix operating systems, Android operating systems, iOS operating systems, or windows operating systems.
  • the application layer includes applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiments of the application do not specifically limit the specific structure of the execution body of the method provided in the embodiments of the application, as long as the program that records the code of the method provided in the embodiments of the application can be executed according to the method provided in the embodiments of the application.
  • the method only needs to communicate.
  • the execution subject of the method provided in the embodiments of the present application may be a terminal device or a network device, or a functional module (such as a processor, a chip) that can call and execute the program in the terminal device or the network device. , Or chip system, etc.).
  • various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques.
  • article of manufacture used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium.
  • computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.).
  • various storage media described herein may represent one or more devices and/or other machine-readable media for storing information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.
  • FIG. 2 is a schematic interaction diagram of a communication method 200 according to an embodiment of the present application.
  • the terminal device in FIG. 2 may be the terminal device in FIG. 1 (for example, the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (for example, a processor, a chip, or a chip system, etc.) .
  • the first access network device may be the access network device 120 in FIG. 1, or may refer to a device (such as a processor, a chip, or a chip system, etc.) in the access network device. It can also be understood that part or all of the information exchanged between the terminal device and the first access network device in FIG.
  • the method 200 includes:
  • the first access network device broadcasts a first identifier, where the first identifier is used to identify information about a network slice of the first access network.
  • the terminal device can obtain the first identifier broadcast by the first access network device.
  • the first access network device may broadcast the first identifier in a system message, such as a mater information block (MIB), a system information block (system information block, SIB) 1, or other SIBx.
  • a system message such as a mater information block (MIB), a system information block (system information block, SIB) 1, or other SIBx.
  • the first access network device may broadcast a public land mobile network (PLMN) identifier (identifier, ID) and the corresponding first identifier in the system message.
  • PLMN public land mobile network
  • the first access network device broadcasts PLMN ID#1 and corresponding first identification #1 and first identification #2; broadcasts PLMN ID#2 and corresponding first identification #3.
  • the first access network device may broadcast the SIBx when requested by the terminal device. That is, when the terminal device finds that the SIBx is not broadcast, the terminal device can request the first access network device to broadcast the SIBx or the system where the SIBx is located through message 1 (msg1) or message 3 (msg3) of the random access process Message (system information, SI).
  • the first access network device broadcasts the SI or the SIBx requested by the terminal device based on the request of the terminal device.
  • the first identifier is used to identify the information of the network slice of the first access network may include: the first identifier is used to identify the area information of the access network network slice where the first access network device is located, for example, the RAN slice area (RAN slicing area, RSA) or RAN Part ID (RAN Part ID).
  • Network slicing can include access network network slicing and core network network slicing.
  • the access network network slicing can be understood as the resource used by the access network to carry network slicing services, and it can also be understood as the identification of the network slicing on the access network side. .
  • the first identifier may also be used to identify the identifier of the first network slice on the access network side, that is, the network slice identifier of the access network.
  • a tracking area tracking area
  • access network devices that broadcast the same first identifier support the same at least one network slice. Therefore, in the first understanding, the first identifier corresponding to the network slice of the first access network can also be regarded as an area identifier, that is, the coverage area of the access network device broadcasting the same first identifier is regarded as an area. The area can support the same at least one network slice.
  • the first identifier corresponding to the first network slice can also be regarded as the access network network slice identifier.
  • the access network device may broadcast one first identifier, or may broadcast multiple first identifiers, which is not limited.
  • Each first identifier corresponds to a network slice set (a network slice set includes at least one network slice), and the network slice sets corresponding to different first identifiers broadcast by the same access network device are different.
  • the base station 1 broadcasts the first identification #1, and the first identification #1 corresponds to the network slice set #1 (the network slice set #1 includes network slices #1 and #2).
  • the base station 1 also broadcasts the first identification #2, which corresponds to the network slice set #2 (the network slice set #2 includes the network slice #3). It can be seen that the network slices contained in the network slice set #1 and the network slice set #2 are not the same.
  • the information used by the first identifier to identify the network slice of the first access network may indirectly reflect the area information of the network slice of the access network where the first access network device is located.
  • An identified access network device constitutes an area with a smaller granularity than the TA.
  • a TA range can be divided into multiple slice areas, and each slice area supports different network slices.
  • the access network devices that broadcast the same first identifier support the same network slice list. For example, base station 1 and base station 2 both broadcast the first identifier #1, and base stations 3 to 6 broadcast the first identifier #2, then it means that base stations 1 and 2 are located in the same access network slice area #1, and base stations 3-6 are located in The same access network slice area #2.
  • the first identifier may be a RAN slice area identifier (RAN slicing area identifier, RSA ID), or may extend the meaning of an ID in an existing standard.
  • the first identifier is a RAN area code (RANAC) identifier or a cell access group (cell access group, CAG) identifier.
  • RANAC RAN area code
  • CAG cell access group
  • the first access network device sends a radio resource control (radio resource control, RRC) message to the terminal device, where the RRC message includes information about at least one first network slice corresponding to the first identifier.
  • RRC radio resource control
  • the information of the at least one first network slice corresponding to the first identifier may be obtained in different implementation manners.
  • the information of the at least one first network slice corresponding to the first identifier may be sent to the first access network device and the core network element by operation and maintenance (OAM).
  • OAM operation and maintenance
  • the first identifier and the information of the at least one first network slice corresponding to the first identifier may be allocated by the core network element to the first access network device.
  • the first access network device sends the information of the supported at least one first network slice to the core network element, and then obtains the first identifier assigned by the core network element.
  • the corresponding relationship between the first identifier and the information of the at least one network slice may remain unchanged within a tracking area TA.
  • the correspondence between the PLMN ID, the first identifier, and the information of at least one network slice may remain unchanged within a tracking area TA.
  • the terminal device After the terminal device moves within the TA range, it is convenient for the terminal device to obtain the first identifier from the broadcast message of the third access network device (the third access network device can be understood as the access network device where the terminal device is moved) .
  • the terminal device detects and discovers the mapping relationship between the first identifier and the information of the at least one first network slice that has been previously acquired, so as to determine the information of the at least one network slice supported by the third access network device.
  • the terminal device judges whether the first access network device and the third access network device are in the same TA range” and “the terminal device judges whether the third access device broadcasts the first
  • the order of the "information of at least one network slice corresponding to an identifier" is not limited.
  • the terminal device determines whether it has acquired the information of at least one network slice corresponding to the first identifier broadcast by the third access device.
  • the device may first determine whether the first access network device and the third access network device are located in the same TA range.
  • the terminal device may determine whether the tracking area code (TAC) broadcast by the first access network device and the TAC broadcast by the third access network device are the same to determine whether the first access network device and the second access network device are the same.
  • TAC tracking area code
  • the terminal device may determine whether the combination of PLMN ID and TAC broadcast by the first access network device is the same as the combination of PLMN ID and TAC broadcast by the third access network device to determine whether the first access network device and the third access network device are the same.
  • the connected devices are located in the same TA range.
  • the combination of PLMN ID and TAC broadcast by the first access network device is the same as the combination of PLMN ID and TAC broadcast by the third access network device, it means that the first access network device and the third access network device are located in the same TA Range; if the combination of PLMN ID and TAC broadcast by the first access network device is different from the combination of PLMN ID and TAC broadcast by the third access network device, it means that the first access network device and the third access network device are located in different locations.
  • the TA range If the first access network device and the third access network device are located in the same TA range, the terminal device then detects whether the mapping relationship has been acquired.
  • the terminal device does not need to re-acquire the first identifier and at least one first network
  • the mapping relationship of sliced information if the mapping relationship has not been obtained, the terminal device needs to apply to the third access network device to obtain the above mapping relationship.
  • the terminal device needs to re-acquire the above mapping relationship. For example, the terminal device accesses the third access network device and sends it to the third access network. The device sends a request to request the third access network device to send the mapping relationship between the first identifier and the information of the at least one first network slice to itself.
  • the terminal device first determines whether the mapping relationship has been acquired, that is, the terminal device determines whether it has acquired the information of at least one network slice corresponding to the first identifier broadcast by the third access device. If the mapping relationship has been acquired, the terminal device then determines whether the first access network device and the third access network device are located in the same TA range; if the mapping relationship has not been acquired, the terminal device needs to report to the third The access network device applies for obtaining the above mapping relationship.
  • mapping relationship has been acquired, if the first access network device and the third access network device are located in the same TA range, the terminal device does not need to acquire the mapping relationship again; if the first access network device The device and the third access network device do not belong to the same TA range, and the terminal device needs to apply to the third access network device to obtain the foregoing mapping relationship.
  • the first access network device and the third access network device do not belong to the same TA range, even if the first access network device and the third access network device both broadcast the first identifier, then the first access network device
  • the information of at least one network slice corresponding to the first identifier broadcast by the network access device may also be different from the information of at least one network slice corresponding to the first identifier broadcast by the third access network device.
  • the access network device obtains the foregoing mapping relationship.
  • the at least one first network slice may be understood as a slice list (or network slice set) supported by or corresponding to the first identifier, where the slice list includes information about at least one network slice.
  • the information of the network slice (for example, the first network slice, or the second network slice appearing below) in the embodiment of the present application can be selected through a single network slice selection assistance information (S-NSSAI) )
  • a slice/service type (slice/service type, SST) identifier, or a slice index, or a slice identifier that can be recognized by the terminal device can also be used, which is not limited.
  • the RRC message may include a slice list corresponding to the first identifier.
  • the RRC message may also include the first identifier.
  • the RRC message may include the mapping relationship (or corresponding relationship) between the first identifier and the slice list.
  • the RRC message includes at least one first identifier, and at least one network slice identifier corresponding to each first identifier in the at least one first identifier.
  • the RRC message may also include a network slice index (slice index) corresponding to each first network slice.
  • a network slice index (slice index) corresponding to each first network slice.
  • S-NSSAI requires 32 bits, but if an access network device or cell only supports 4 slices, the slice index only needs 2 bits to indicate 4 slices, which can further greatly reduce broadcast overhead.
  • the information elements that may be included in the RRC message are as follows:
  • the information element (IE) that may be included in the RRC message is as follows:
  • the slice index included in the RRC message may be optional.
  • the first access network device sends the information of at least one first network slice corresponding to the first identifier through the RRC message.
  • the first access network device may also use media access control control element (MAC CE) messages, broadcast messages, non-access stratum (NAS) messages, or random Message 1 or message 3 of the access process, etc., send information of at least one first network slice corresponding to the first identifier, which is not limited.
  • MAC CE media access control control element
  • NAS non-access stratum
  • random Message 1 or message 3 of the access process etc.
  • the first access network device may send information about at least one first network slice corresponding to the first identifier to the core network element.
  • the first access network device may directly include the above-mentioned network slice list corresponding to the first identifier (at least A first network slice information).
  • the NG interface message further includes a first identifier. If the reported content is at the cell level, the first access network device includes the cell identifier and the network slice list (cell identifier and slice list) corresponding to the cell identifier in the above NG interface message.
  • the NG interface message also includes Contains the first logo.
  • NG interface is divided into NG-C interface (control plane interface between NG-RAN and 5GC) and NG-U interface (user plane interface between NG-RAN and 5GC). The NG interface message is the message transmitted through the NG-C interface.
  • the first access network device may also learn the RSA ID and slice list corresponding to the neighboring base station (for example, the neighboring base station is the second access network device). For example, assuming that the first access network device and the second access network device are connected through an Xn interface, the first access network device and the second access network device can communicate through an Xn interface message (for example, an Xn interface establishment request). Or Xn interface establishment reply or NG-RAN NODE CONFIGURATION UPDATE) exchange the corresponding RSA ID and slice list. For example, the first access network device sends an Xn interface message to the second access network device, and the Xn interface message includes the foregoing first identifier and at least one network slice information.
  • an Xn interface message for example, an Xn interface establishment request.
  • the first access network device can obtain the RSA ID and slice list corresponding to the neighboring base station through the Xn interface message.
  • the first access network device may send the RSA ID and slice list corresponding to the neighboring base station to the core network element.
  • the core network element regardless of whether the RSA ID and slice list corresponding to the access network device are reported by the access network device or configured through OAM, the core network element can receive the information of all the access network devices within the TA range. RSA ID and slice list.
  • the core network element can learn the RSA ID and slice list corresponding to all the access network devices within the TA range by reporting all the access network devices within the TA range.
  • the core network element may send the above-mentioned mapping relationship between RSA ID and slice list to the terminal device through NAS messages, for example, through NAS messages such as Registration Accept, UE Configuration Update command, etc., the above-mentioned mapping relationship between RSA ID and slice list Send to the terminal device.
  • the first access network device broadcasts the first identifier, and then sends information about at least one first network slice corresponding to the first identifier through an RRC message, which can reduce the broadcast overhead of the first access network device.
  • the mapping relationship between the first identifier and at least one first network slice does not change within the TA range
  • 8bit can identify the TA
  • slice area is described here by taking the schematic diagram in FIG. 3 as an example.
  • a TA range includes three slice areas (slicing area or slice area) (or called RSA), namely: slice area1, slice area2, and slice area3.
  • the slice lists supported by different slice areas may be completely different, or some overlap.
  • gNB1, gNB2, and gNB3 are located in slice area1;
  • gNB4 and gNB5 are located in slice area2;
  • gNB6, gNB7, and gNB8 are located in slice area3.
  • slice area1 supports slice#1 and slice#2;
  • slice area2 supports slice#3 and slice#4; slice area3 supports slice#1, slice#5 and slice#6.
  • the network slice supported by one TA area is composed of the union of the network slice lists supported by multiple slice areas.
  • the network slices supported by the access network devices or cells in a slice area are the same.
  • gNB1, gNB2, and gNB3 in slice area1 support slice#1 and slice#2; gNB4 and gNB5 in slice area2 support slice#3 and slice#4.
  • gNB1, gNB2, and gNB3 in slice area1 support slice#1; gNB2, gNB4, and gNB5 in slice area2 support slice#2. It can be seen that gNB2 supports both slice#1 and slice#2, so it falls into the scope of slice area1 and slice area2 at the same time.
  • the embodiment of the present application does not limit the specific scene of the slice area, that is, the two cases in FIG. 3 and FIG. 4 are applicable.
  • the TA range is not divided into multiple areas, assuming that the mapping relationship supported by the access network device within the TA range remains unchanged, then after the terminal device obtains the mapping relationship, it will continue to be within the TA range. No need to move anymore.
  • the TA area is divided into multiple areas (such as the slice area in FIG. 3 or the slice area in FIG. 4), the network slices supported by the access network devices in different areas are different.
  • the mapping relationship within the range remains unchanged.
  • the access network device in an area is required to inform the terminal device of the mapping relationship that may be closed in all areas within the TA range, so that the terminal device can obtain it when it moves within the TA range.
  • Mapping relations is the mapping relationship between the first identifier and at least one first network slice, for example, the mapping relationship between the RSA ID and the information of at least one slice.
  • the first access network device may actively send the information of at least one first network slice corresponding to the first identifier to the terminal device, or may also send it to the terminal device based on a request of the terminal device, which is not limited.
  • the method 200 further includes:
  • the terminal device sends a request message to the first access network device, where the request message is used to request information about at least one first network slice corresponding to the first identifier.
  • the first access network device receives the request message from the terminal device.
  • the request message is used to indicate that the terminal device expects to obtain information of at least one first network slice corresponding to the first identifier, for example, the mapping relationship between the RSA ID and the slice list.
  • the form of the request message is not limited here.
  • the request message may be an RRC message.
  • the request message may be a MAC layer message, such as a newly defined MAC CE.
  • the request message may be a newly added indication in the uplink RRC message.
  • the request message of the terminal device may include at least one first identifier, that is, for requesting information about a network slice corresponding to each first identifier in the at least one first identifier.
  • the first access network device broadcasts the first identifier #1, the first identifier #2, and the first identifier #3, but the terminal device only wants to obtain at least one network corresponding to the first identifier #1 and the first identifier #2.
  • Slice information the terminal device will include the first identifier #1 and the first identifier #2 in the request message, so that the first access network device provides at least one network slice corresponding to the first identifier #1 in the RRC message. And the information of the first identifier #2 and the corresponding at least one network slice.
  • the terminal device may not recognize the first identifier, so that the information of at least one first network slice corresponding to the first identifier cannot be obtained. Or although the first identifier is recognized, the tracking area update of the terminal device occurs, and the mapping relationship between the first identifier and the information of the at least one network slice may have changed at this time.
  • the terminal device can obtain information of at least one first network slice corresponding to the first identifier by sending a request message to the first access network device.
  • the terminal device can trigger the sending of an uplink RRC message (for example, an RSA update request (update request)) to the first access network device.
  • the first access network device may send the slice list corresponding to the RSA ID to the terminal device in a downlink RRC message (for example, an RSA update response (update response)), or send the RSA ID and the corresponding slice list to the terminal device.
  • the RSA update process in Figure 5 is introduced for description. Taking the first access network device as the gNB, the terminal device as the UE, the uplink RRC message is the RSA update request, and the downlink RRC message is the RSA update response as an example for description. As shown in Figure 5, the RSA update process 300 includes:
  • gNB broadcasts RSA ID.
  • the UE obtains the RSA ID broadcast by the gNB.
  • the UE determines whether it has acquired network slice information (for example, slice list) corresponding to the RSA ID.
  • the UE can detect whether the mapping relationship between the RSA ID (for example, the mapping relationship between the RSA ID and the slice list) has been acquired. For example, the UE can detect whether it has acquired the slice list corresponding to the RSA ID. For another example, the UE can detect whether it has acquired the slice list corresponding to the RSA ID and the slice index of each slice in the slice list.
  • the mapping relationship between the RSA ID for example, the mapping relationship between the RSA ID and the slice list
  • Step 32 may include the following different situations.
  • the base station 2 in each of the following situations corresponds to the gNB in step 31.
  • the UE only needs to detect whether the mapping relationship between the RSA ID and the network slice has been acquired. For example, the UE reads the RSA ID broadcast by the base station 1, and at the same time obtains the mapping relationship between the RSA ID and the network slice ID, and the UE saves the mapping relationship between the RSA ID and the network slice. After the UE subsequently moves to the base station 2, it judges whether the mapping relationship between the RSA ID and the network slice has been acquired according to the RSA ID broadcast by the base station 2 and the mapping relationship between the RSA ID and the network slice saved by itself.
  • Possibility 2 Assuming that the PLMN ID, RSA ID, and network slice ID have a mapping relationship and are unique in the entire network, the UE needs to detect whether the PLMN ID has been acquired and the mapping relationship between the RSA ID and the network slice. For example, the UE reads the PLMN ID and the corresponding RSA ID broadcast by the base station 1, and at the same time obtains the mapping relationship between the PLMN ID, the RSA ID and the network slice ID, and the UE saves the mapping relationship between the PLMN ID, the RSA ID and the network slice.
  • the UE needs to detect whether the mapping relationship between the RSA ID and the network slice under the TA has been acquired. For example, the UE reads the TAC and RSA ID broadcast by the base station 1, and at the same time obtains the mapping relationship between the RSA ID and the network slice ID, and the UE saves the mapping relationship between the TAC, RSA ID and the network slice. After the UE subsequently moves to base station 2, it judges whether the mapping relationship between the RSA ID and the network slice under the TAC is obtained according to the TAC and RSA ID broadcast by the base station 2, as well as the mapping relationship between the TAC, RSA ID and the network slice saved by itself .
  • the UE needs to detect whether the TA has acquired the mapping relationship between the RSA ID and the network slice under the PLMN ID. For example, the UE reads the PLMN ID, TAC, and RSA ID broadcast by the base station 1, and at the same time obtains the mapping relationship between the PLMN ID, the RSA ID, and the network slice ID, and the UE saves the mapping relationship between the PLMN ID, TAC, RSA ID, and the network slice.
  • the UE may perform step 33.
  • the UE sends an RSA update request to the gNB.
  • the UE sends an RSA update request to the gNB to request the network slice information corresponding to the RSA ID.
  • the gNB sends an RSA update response to the UE.
  • the gNB may include the network slice information corresponding to the RSA ID in the RSA update response.
  • the trigger condition for the terminal device to send the request message is also not limited here.
  • the terminal device when the terminal device finds that the information of at least one first network slice corresponding to the RSA ID is not saved, it may send a request message to the first access network device.
  • the terminal device may initiate a tracking area update (TAU) process (such as NAS message Tracking Area Update request), or attach (attach) process, or registration process (such as NAS message Registration Request), or PDU Session establishment request (such as NAS message PDU Session Establishment request), you need to read the RSA ID broadcast by the access network device, if it is found that the slice list corresponding to the RSA ID is not saved (or the mapping relationship between RSA ID and slice list) , The NAS layer of the terminal device notifies the AS layer that it needs to obtain the mapping relationship between the RSA ID identifier and the slice list. Or, the NAS layer of the terminal device notifies the AS layer of the target network slice identifier.
  • TAU tracking area update
  • attach attach
  • registration process such as NAS message Registration Request
  • PDU Session establishment request such as NAS message PDU Session Establishment request
  • the AS layer of the terminal device determines that the RSA ID corresponding to the target network slice identifier cannot be found, the AS layer determines that it needs to obtain the mapping relationship between the RSA ID and the slice list. .
  • the terminal device reads the RSA ID broadcast by the access network device and finds that the mapping relationship between the RSA ID and the slice list is not saved, and then determines that the mapping relationship between the RSA ID and the slice list needs to be obtained.
  • the terminal device may include the above request message in the RRC message (or MAC CE or other signaling).
  • the existing RRCResumeRequest message can be reused to implement the RSA update procedure.
  • the terminal device discovers that the RANAC has changed, it triggers the RRC layer to generate an RRCResumeRequest message, and at the same time, the cause value (cause value) contained in the RRC recovery request (RRCResumeRequest) message is RSA update.
  • the first access network device finds that the cause value is RSA update, the first access network device subsequently includes the first identifier and the corresponding at least one network slice identifier in the RRC message. This is described with reference to the RSA update process 400 corresponding to the RRC inactive state in FIG. 6.
  • the terminal device is a UE and the first access network device is a gNB1.
  • the RSA update process corresponding to the RRC inactive state includes:
  • the UE sends an RRCResumeRequest to gNB1.
  • the RRCResumeRequest includes the reason value RSA update, which indicates that the network slice information corresponding to the RSA ID (for example, the mapping relationship between the RSA ID and the slice list, and the specific description can refer to the description in step 32 above) needs to be updated.
  • gNB1 sends an RRC release (RRCRelease) message to the UE.
  • RRC release RRCRelease
  • the RRCRelease includes the mapping relationship between the RSA ID and the slice list, for example, the RSA ID and the slice list supported by the RSA ID.
  • the gNB1 when the gNB1 finds that the cause value in the RRCResumeRequest is RSA update, it may trigger steps 43-45 or not, depending on the implementation of gNB1, which is not specifically limited.
  • gNB1 and gNB2 recover the context information of the UE through interaction.
  • gNB2 is a base station that serves the UE before the UE moves, and can be called the last serving gNB.
  • gNB2 is the anchor gNB that stores the UE context.
  • the gNB1 sends a path switch request (path switch request) to the access management function (AMF).
  • path switch request path switch request
  • AMF access management function
  • the AMF sends a path switch response (path switch response) to gNB1.
  • the first identifier may be used for admission control.
  • RSA ID RSA ID
  • RANAC or CAG identification can also be used for admission control.
  • the RSA ID Take the RSA ID as an example.
  • the terminal device is configured with an allowed RSA ID in advance (it may be that the core network element configures the allowed RSA list for the terminal device through NAS messages, or it may be that the first access network device passes the RRC If the message is configured to the terminal device, for example, through an RRC reconfiguration message or an RRCRelease message, the terminal device will determine whether the RSA ID broadcast by the cell belongs to the RSA list that is allowed to access after it newly arrives in a cell.
  • the terminal device can access the cell; if the RSA ID broadcast by the cell does not belong to the allowed RSA list, the terminal device cannot access the cell.
  • the first access network device can also configure the mapping relationship between RSA ID and access category (access category, AC), or the mapping relationship between S-NSSAI and access category AC, or RSA ID, S- The mapping relationship between NSSAI and access category AC.
  • these mapping relationships can be customized by the operator, and the terminal device is configured before leaving the factory. Or, these mapping relationships are notified to the terminal device by a core network element (for example, AMF) through a NAS layer message.
  • a core network element for example, AMF
  • the terminal device can find the corresponding AC according to the S-NSSAI corresponding to the service (for example, the mapping relationship between the application (APP) ID and S-NSSAI given in the NAS message) and/or the RSA ID broadcast by the current cell Therefore, it is possible to determine whether the current cell can be accessed according to the access control parameters corresponding to the AC broadcast by the access network equipment.
  • the access control parameters corresponding to the AC are also called unified access control (UAC).
  • the terminal device may also determine whether the current access network device supports the target network slice identifier according to the target network slice identifier and the mapping relationship between the first identifier and at least one network slice. If the current access network device supports the target network slice identifier, the terminal device may try to access the current access network device. If the current access network device does not support the target network slice identifier, the terminal device may choose to access other access network devices. It can be understood that the relationship between the current access network device and the first access network device is not limited here. The current access network device may be the first access network device or not the first access network device, and there is no specific description about this. limited.
  • the access network devices can exchange their respective broadcast identifiers and network slice information corresponding to the identifiers. That is, the first access network device can obtain the identifier broadcast by the neighboring base station or the neighboring cell and the information of the network slice corresponding to the identifier, and can also combine the first identifier and at least one first network slice corresponding to the first identifier. The information is sent to the neighboring base station.
  • the method 200 further includes: S240.
  • the second access network device sends a first message to the first access network device, where the first message includes a second identifier, and at least one second identifier corresponding to the second identifier. Information about network slicing.
  • the first access network device receives the first message from the second access network device.
  • the second identifier is used to identify information about the network slice of the second access network.
  • the first message here may be an Xn interface message, and the Xn interface message may include the RSA ID and slice list corresponding to the second access device.
  • the second access network device and the first access network device may be adjacent base stations to each other.
  • the second access network device and the first access network device may exchange their respective broadcast identifiers and network slice information corresponding to the identifiers.
  • the introduction of the second identifier here is only to characterize the slice area corresponding to the second access network device.
  • the information of the second access network network slice has no other special meaning.
  • the "first identifier" and "second identifier" are introduced in this embodiment of the application to distinguish the information of the access network slices that they respectively identify.
  • the description of the second identifier refer to the description of the first identifier above.
  • the first access network device may notify the terminal device of the foregoing information. In this way, after the terminal device moves to the coverage area of the second access network device, there is no need to request the second access network device for the information of the at least one second network slice corresponding to the second identifier.
  • the RRC message sent by the first access network device to the terminal device may further include a second identifier and information of at least one second network slice corresponding to the second identifier. In this way, the terminal device can obtain the information of the at least one second network slice corresponding to the second identifier of the second access network device in advance, which can reduce the number of requests for the terminal device to trigger at least one second network slice corresponding to the second identifier. The flow of information helps to save the power consumption of the terminal equipment.
  • the embodiment of the present application does not limit whether the first access network device and the second access network device belong to the same slice area.
  • the first access network device and the second access network device may belong to the same slice area, that is, the supported network slices correspond to each other, then the first identifier is the same as the second identifier, that is, the first access network network slice identified by the first identifier
  • the information of is the same as the information of the network slice of the second access network identified by the second identifier.
  • the network slices supported by the first access network device and the second access network device are partially identical or overlapped, that is, part of the network slices in "at least one first network slice" and "at least one second network slice” Part of the network slices are the same; the first access network device and the second access network device may not belong to the same slice area, but the terminal device can learn the second identifier and at least the second identifier corresponding to the second identifier from the first access network device in advance. Information about a second network slice.
  • This application also provides a communication method.
  • the terminal device may compare the network slice information included in the paging message with the network slice supported by the current cell. If the current cell does not support it, the terminal device can trigger cell reselection. This will be described in detail below.
  • FIG. 7 is a schematic interaction diagram of another communication method 500 according to an embodiment of the present application.
  • the terminal device in FIG. 7 may be the terminal device in FIG. 1 (for example, the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (for example, a processor, a chip, or a chip system, etc.) .
  • the network device may be the access network device 120 in FIG. 1, or it may refer to a device in the access network device (such as a processor, a chip, or a chip system, etc.); or, it may be the core network device in FIG.
  • the device 110 may also be a device in a core network device (for example, a processor, a chip, a chip system, etc.).
  • the method 500 includes:
  • the terminal device receives a paging message from the network device, where the paging message includes information about the first network slice.
  • the information of the first network slice may include at least one of S-NSSAI and SST, and may also be an identifier of a network slice known to other terminal devices, access network devices, and core network network elements.
  • the network device may be an access network device or a core network network element, which is not limited.
  • the core network element sends a paging message to the access network device.
  • the terminal device receives the paging message sent by the core network element through the access network device, where the access network device is responsible for managing the cell where the terminal device is currently located.
  • the terminal device can compare the information of the network slice supported by the cell where the terminal device is currently located (or the information of the network slice supported by the access network device) with the first network included in the paging message.
  • the slice information is compared to determine whether the cell where the terminal device is currently located supports the first network slice.
  • the terminal device can send the ue-Identity and accessType to the higher layer, that is, the NAS layer. If the cell where the terminal device is currently located does not support the first network slice in the paging message, the terminal device is triggered to perform cell reselection.
  • the access network device may include a list of cells that support the first network slice or an RSA that supports the first network slice in the paging message. ID or other cell identification or carrier identification that supports the first network slice, so that the terminal device can perform cell reselection in a purposeful manner.
  • the terminal device performs cell reselection, it can use the cell list that supports the first network slice provided in the paging message (or the RSA ID that supports the first network slice, or the carrier identifier that supports the first network slice).
  • Etc. Perform cell reselection, or perform cell reselection in a cell that supports the RSA ID of the first network slice provided in the paging message.
  • the terminal device cannot find the cell or the access network device that supports the first network slice in the paging message, if the terminal device has received the first mapping relationship of the network slice remapping, it can use the first mapping relationship to perform the cell Re-elect.
  • the meaning of network slice remapping is that when a terminal device wants to initiate a service associated with the first network slice, the terminal device or network device (the network device may include an access network device or a core network element) can pass through the first network slice.
  • the network resource of the second network slice of the mapping relationship supports the service associated with the first network slice. For example, the terminal device wants to support services associated with network slice #1, but cannot find an access network device that supports network slice #1.
  • the terminal device can find Support the cell or access network equipment of network slice #2, and initiate services associated with network slice #1.
  • the first mapping relationship may be obtained by the terminal device from the core network element or the access network device. For example, when the terminal device is registered in the core network, the core network element sends the first mapping relationship to the terminal device through a NAS message (for example, Registration Accept or UE Configuration Update command, etc.). For example, when the access network device sends a paging message, it carries the first mapping relationship.
  • NAS message for example, Registration Accept or UE Configuration Update command, etc.
  • the first mapping relationship is used to characterize the mapping relationship between the network slice and the network slice.
  • the first mapping relationship can also be other names, which are not limited.
  • the first mapping relationship can be understood as a network slice remapping list (slice remapping list).
  • the slice remapping list can include the following information elements: slice ID and remapped slice ID.
  • the network slice remapping table may be as follows:
  • the first mapping relationship also includes PLMN information.
  • PLMN information e.g., PLMN information.
  • a possible form of the network slice remapping table is as follows:
  • the terminal device performing cell reselection includes: the terminal device performing cell reselection according to a first mapping relationship, where the first mapping relationship includes information about the first network slice, and For the information of the second network slice, there is a remapping relationship between the information of the first network slice and the information of the second network slice.
  • the terminal device can use two network slices with a remapping relationship to perform cell reselection. If the cell where the terminal device is located does not support the first network slice, the terminal device may use the second network slice that has a remapping relationship with the first network slice to perform cell reselection.
  • the information of the first network slice may include the ID or index of the first network slice, SST/S-NSSAI, and so on.
  • the information of the second network slice may include the ID or index of the second network slice, SST/S-NSSAI, and so on.
  • the information of the first network slice is slice ID
  • the information of the second network slice may be remapped slice ID.
  • the terminal device performs cell reselection according to the first mapping relationship, including: if the cell where the terminal device is currently located supports the second network slice, the terminal device initiates a random access procedure in the cell where the terminal device is currently located; if the cell where the terminal device is currently located The second network slice is not supported, and the terminal device selects a cell that supports the second network slice.
  • the terminal device may initiate a random access procedure in the cell where it is currently located, and the random access initiation procedure may refer to an existing standardized procedure. If the cell where the terminal device is currently located does not support the second network slicing, the terminal device can select a cell that supports the second network slicing, for example, to determine whether the surrounding neighboring cells support the second network slicing. If there is a cell that supports the second network slicing, according to The cell reselection criterion selects a cell that supports the second network slice.
  • the terminal device finds a cell that supports the second network slice, it can inform the access network device or the core network element of the information of the second network slice.
  • the method 500 further includes: the terminal device sends a second message to the network device (access network device or core network element), and the second The message includes the information of the first network slice and the information of the second network slice, or the second message includes the information of the second network slice.
  • the second message includes the remapped slice ID.
  • the second message includes slice ID and remapped slice ID.
  • the terminal device can find a remapped slice ID that supports it, it accesses the selected cell and informs the current access network device target slice ID (that is, the slice ID contained in the paging message) and the remapped slice ID.
  • the current access network device forwards the NAS message of the terminal device (for example, PDU Session Establishment Request or Service Request message)
  • the NG interface message includes the target slice ID and or remapped slice ID.
  • the terminal device informs the core network element of the remapped slice ID and target slice ID through a NAS message, so that the core network can find the corresponding QoS parameter according to the remapped slice ID.
  • the terminal device if it fails to select a cell, it can notify the network device of the failure to select the cell.
  • Cell failure means that the terminal device cannot find a cell that supports the target network slice (that is, the network slice corresponding to the network slice identifier contained in the paging message), or after using the network slice remap table, it cannot find the cell that supports remapped slice.
  • the cell alternatively, a cell that supports the target network slice can be found (or a cell that supports remapped slices can be found using the network slice remap table), but the cell is denied access.
  • the method 500 further includes: the terminal device sends a third message to the network device (access network device or core network element), and the third message is used to notify the terminal device that the cell selection fails.
  • the terminal device if the terminal device fails to select a cell, it can notify the access network device or the core network element through a third message.
  • the third message is a NAS message.
  • “the terminal device fails to select a cell” may include: the cell selection fails using the first mapping relationship.
  • the method 500 further includes: the terminal device obtains the information of the network slice supported by the current cell.
  • the terminal device may refer to the description in the method 200 above for obtaining the information of the network slice supported by the current cell.
  • the above-mentioned behavior of "terminal equipment performing cell reselection" may be performed based on one or more of the following parameters: the number of attempts to access the cell, a timer, etc., which is not limited.
  • the above-mentioned parameters may be carried by system broadcast messages, may also be carried by paging messages, or may be carried by RRC messages, which is not limited.
  • a possible implementation of cell reselection based on the "number of attempts to access the cell” may be when the terminal device attempts to access a cell that supports the target network slice and reaches the "number of attempts to access the cell" and is unsuccessful , The terminal device tries to search for a cell that supports remapped slice.
  • a possible implementation of cell reselection based on "timer" may be that when the access cell first tries to search for a cell that supports the target network slice before the timer expires; when the timer expires, and When the cell that supports the target network slice cannot be found, the terminal device tries to search for the cell that supports remapped slice.
  • This application also provides a communication method.
  • the terminal device can combine the priority information to perform cell selection or cell reselection, which helps to select a more suitable cell.
  • the terminal equipment can combine the above priority information to perform cell selection or cell reconfiguration. select. This will be described in detail below.
  • FIG. 8 is a schematic flowchart of another communication method 600 according to an embodiment of the present application.
  • the terminal device in FIG. 8 may be the terminal device in FIG. 1 (for example, the terminal device 130 or the terminal device 140), or may refer to a device in the terminal device (for example, a processor, a chip, or a chip system, etc.) .
  • the core network element device may be the core network device 110 in FIG. 1, or may refer to a device in the core network device (for example, a processor, a chip, or a chip system, etc.).
  • the access network device may be the access network device 120 in FIG. 1 or a device in the access network device (for example, a processor, a chip, or a chip system, etc.).
  • the method 600 includes:
  • the core network element determines the priority of each network slice in at least one network slice.
  • the core network element can determine the corresponding priority for each network slice.
  • S620 The core network element sends a fourth message, where the fourth message includes the identifier of each network slice and the priority corresponding to each network slice.
  • the core network element may send the fourth message to the terminal device, and may also send the fourth message to the terminal device through the access network device, which is not limited.
  • the fourth message is a non-access stratum NAS message sent by the core network element to the terminal device.
  • the core network element when the core network element sends the allowed S-NSSAI to the terminal device through the NAS message, it can also give the priority of the slice at the same time.
  • the specific information element is as follows:
  • the terminal device obtains the priority information of each network slice in at least one network slice; and then performs cell selection or cell reselection according to the priority information of each network slice.
  • the terminal device may obtain the priority information of the network slice in different ways.
  • the terminal device associates the APP ID according to the network slice selection policy (network slice selection policy, NSSP) that may be included in the UE route selection policy (UE route selection policy, URSP) given by the core network element And S-NSSAI; then, the terminal device can sort the priority of the network slice according to the historical application APP usage, for example, the S-NSSAI corresponding to the APP ID with the longest use time is taken as the highest priority, and so on, finally Determine the priority of S-NSSAI.
  • the terminal device may directly obtain priority information of each network slice in at least one network slice from the core network element.
  • the terminal device After obtaining the priority information of the network slice, the terminal device can use the priority information of the network slice to perform cell selection or cell reselection.
  • the terminal device performs cell selection or cell reselection according to the priority information of each network slice, including:
  • the terminal device selects the first network slice in the at least one network slice, and the priority of the first network slice is the highest among the at least one network slice; determines whether the first cell supports the first network slice; in In the case that the first cell does not support the first network slice, perform a cell search to obtain a second cell, and determine whether the second cell supports the first network slice.
  • Meet cell reselection conditions for example, S criterion or R criterion
  • the second cell in the case that the second cell supports the first network slice, or when the second cell supports the first network slice, it also satisfies the cell reselection
  • the terminal device chooses to camp on the candidate cell set.
  • the cell with the best signal for example, the highest received power or the highest signal strength
  • the terminal device selects the second network slice, and the priority of the second network slice is less than that of the second network slice.
  • the priority of the first network slice continue to perform cell search until a suitable cell is selected; if the first cell supports the first network slice, the terminal device continues to camp on the first cell.
  • the above-mentioned first cell is the cell where the terminal device currently resides, and the terminal device gives priority to the first cell. Specifically, the terminal device selects the network slice with the highest priority according to the priority information. First, the terminal device determines whether the cell currently camped on supports the network slice with the highest priority (for example, the network slice supported by the cell currently camped on may be the S-NSSAI supported by the access network device directly, or through indirect RSA ID notification), if the current camping cell supports the network slice with the highest priority, it remains unchanged, that is, it still stays in the current cell; if the current camping cell does not support the network slice with the highest priority, the terminal device Perform a cell search, and after searching for a second cell (for example, satisfying cell selection or cell reselection conditions, such as S criterion or R criterion), determine the second cell (the second cell can be understood as the search by the terminal device that satisfies the S criterion or R criterion).
  • the second cell can be understood as the
  • the terminal device selects a cell according to the cell reselection principle, for example, ranks the cells in the candidate cell set according to the cell reselection R criterion, and then the terminal device selects the highest ranked cell in the candidate cell set Community. If the candidate cell set is empty, the terminal device selects the second priority network slice, and the subsequent judgment behavior is as described above until the cell is selected.
  • the terminal device performs cell selection or cell reselection according to the priority information of each network slice, including:
  • the terminal device selects a first network slice among the at least one network slice, and the priority of the first network slice is the highest among the at least one network slice; the terminal device performs a cell search to obtain a third cell ; Determine whether the third cell supports the first network slice; in the case that the third cell supports the first network slice, if the third cell satisfies a cell selection condition or a cell reselection condition, such as S criterion Or the R criterion, the terminal device puts the third cell into the candidate cell set, and continues to search and execute the aforementioned actions until no new cell can be found.
  • a cell selection condition or a cell reselection condition such as S criterion Or the R criterion
  • the terminal device selects to camp on the cell with the best signal (for example, the highest received power or the highest signal strength) in the candidate cell set; in the case that the candidate cell set is empty.
  • the terminal device selects a second network slice, the priority of the second network slice is lower than the priority of the first network slice, and continues to perform cell search until a suitable cell is selected.
  • the terminal device treats the current camping cell and all other cells equally.
  • the terminal device selects the slice with the highest priority according to the priority information.
  • the terminal device performs a cell search, searches for a third cell (for example, satisfies cell selection conditions or cell reselection conditions, such as S criterion or R criterion), and judges the third cell (the third cell can be understood as the terminal device searches after cell search Whether the arrived cell supports the network slice with the highest priority, if it is supported, put it into the candidate cell set, and continue to search and perform the aforementioned actions until no new cell can be found.
  • the terminal device selects a cell in the candidate cell set according to the cell reselection principle.
  • the terminal device selects a second priority network slice (for example, a second network slice), and subsequent actions are the same as described above, until a suitable cell is selected.
  • the foregoing describes the implementation of cell selection or reselection by terminal equipment based on the priority of network slices.
  • the following will describe the priority of terminal equipment based on different network slices on different frequencies, or the priority of different network slices on different frequencies.
  • the access network device determines the priority of each network slice in at least one network slice for the first frequency point; the access network device sends a fifth message to the terminal device, the fifth message It includes the first frequency point, the identifier of each network slice, and the priority corresponding to each network slice.
  • the terminal device receives the fifth message; and performs cell selection or reselection according to the fifth message.
  • the fifth message can be sent in a broadcast mode or can be sent in an RRC message mode, which is not limited.
  • the fifth message may not include the priority corresponding to each network slice, and the priority of each network slice may be indirectly reflected by the sorting of the identifiers of each network slice, for example, the higher the network slice. , The higher the priority of its network slicing.
  • the access network device can determine the priority information of each network slice for each of the multiple frequency points. This implementation can also be understood as a per frequency per slice.
  • the cells included in the fifth message are as follows:
  • Carrier frequency list Carrier frequency list
  • Carrier frequency e.g. absolute radio-frequency channel number (ARFCN) value
  • the slice ID can be S-NSSAI, or slice index, or other slice IDs, such as the RSA ID mentioned above, which is not limited.
  • the slice ID is an RSA ID
  • the fifth message gives the priority corresponding to each RSA ID on each frequency point.
  • the access network device in slice area 1 may broadcast the following information in a broadcast message:
  • the above information broadcast by the access network equipment in slice area 1 can be understood as: if the terminal equipment in this slice area 1 wants to support URLLC services, it will preferentially perform cell search on 4.9 GHz; if it wants to support eMBB services, it will preferentially perform cell search at 2.6 GHz. To perform a cell search.
  • the access network device in slice area 2 may broadcast the following information in a broadcast message:
  • the above-mentioned information broadcast by the access network device of the slice area 2 can be understood as: in the slice area 2 only eMBB services are supported, that is, UEs that support the eMBB service can only perform cell search on 4.9 GHz.
  • the fifth message includes the network slice priority information of the first frequency point as an example.
  • the fifth message may include the network slice priority information of each frequency point in multiple frequency points.
  • the fifth message may include multiple frequency points, the identifier of the network slice corresponding to each frequency point, and the priority corresponding to each network slice.
  • the terminal device After receiving the fifth message, the terminal device can know the priorities of different network slices for different frequency points. That is, it is equivalent to knowing the priority of the first network slice at different frequency points.
  • the first frequency point is the frequency point with the highest priority of the first network slice.
  • the broadcast message of the access network device shows that it is for the URLLC service, 4.9GHz is a high priority, 2.6GHz is a low priority or does not support the URLLC service, then 4.9GHz is the first frequency point.
  • the terminal device After searching for a cell on the first frequency point, the terminal device selects a suitable cell to camp on according to the cell selection condition or the cell reselection condition, for example, the cell with the highest signal strength.
  • the access network device can determine the priority of each network slice in at least one network slice for the first frequency point, and send a fifth message to the terminal device, where the fifth message includes all the network slices.
  • this implementation can also be applied to RSA ID.
  • the access network device can determine the priority of each RSA ID in at least one RSA ID for the first frequency point, and send a fifth message to the terminal device, where the fifth message includes the first frequency point, Each RSA ID and the priority corresponding to each RSA ID.
  • the terminal device may determine the corresponding RSA ID according to the first network slice, and select the first frequency point with the highest priority according to the RSA ID. Then, the terminal device searches for a cell on the first frequency point, and finally selects a suitable cell to camp on according to the cell selection condition or the cell reselection condition.
  • the first network slice may be obtained by the terminal device using the foregoing method of selecting the network slice, or may be selected according to service requirements, which is not limited.
  • the NAS layer of the terminal device notifies that the service of the first network slice needs to be initiated, that is, the NAS layer informs the AS layer of the identification of the first network slice.
  • the access network device determines the priority of each frequency point in at least one frequency point for the first network slice; and sends a sixth message to the terminal device.
  • the sixth message includes the information of the first network slice. Identification, identification of each frequency point, and priority corresponding to each frequency point.
  • the terminal device receives the sixth message. It can be understood that the sixth message can be sent in a broadcast mode or in an RRC message mode, which is not limited.
  • the sixth message may not include the priority corresponding to each frequency point, and the priority of each frequency point may be indirectly reflected by the sorting of the identifier of each frequency point, for example, the higher frequency point , The higher the frequency priority.
  • the access network device can determine the priority information of each frequency point for each of the multiple network slices. This implementation can also be understood as a per slice per frequency method.
  • the cells included in the sixth message are as follows:
  • the access network device may determine the priority of different frequency points for the first network slice, and send information such as the priority of each frequency point, the identifier of the frequency point, and the identifier of the first network slice to the terminal device.
  • the first network slice is only used as an example for description. In fact, the access network device may determine the priority of each frequency point for each network slice of the multiple network slices.
  • the slice ID can be S-NSSAI, or slice index, or other slice IDs, such as the RSA ID mentioned above, which is not limited.
  • the sixth message gives the priority corresponding to each frequency point on each RSA ID.
  • the access network device can determine the priority of each frequency point in at least one frequency point for the first network slice, and send a sixth message to the terminal device.
  • the sixth message includes the first The identification of the network slice, the identification of each frequency point, and the priority scheme corresponding to each frequency point. It can be understood that this implementation can also be applied to RSA ID.
  • the access network device can determine the priority of each frequency point in at least one frequency point for the RSA ID; send a sixth message to the terminal device.
  • the sixth message includes the RSA ID, each frequency point, and each frequency point. The priority corresponding to the frequency point.
  • the terminal device acquires the priority of each frequency point in at least one frequency point of the first network slice; performs cell search on the first frequency point, and the first frequency point is the at least one frequency point. A frequency point with the highest priority in a frequency point.
  • the first network slice may be obtained by the terminal device using the foregoing method of selecting the network slice, or may be selected according to service requirements, which is not limited.
  • the NAS layer of the terminal device notifies that the service of the first network slice needs to be initiated, that is, the NAS layer informs the AS layer of the identification of the first network slice.
  • the terminal equipment can monitor cell broadcast messages, learn network slice information, frequency point information, priority information, and so on.
  • the terminal device may select the first frequency point among the at least one frequency point according to the priority of the first network slice at each frequency point, and the first frequency point is the first network slice at all the frequency points.
  • the frequency point with the highest priority among the at least one frequency point For example, both 2.6Ghz and 4.9GHz support the first network slice, where the first network slice has a higher priority at 4.9GHz, and the first network slice has a priority at 2.6GHz, so the first frequency point selected is 4.9GHz .
  • the terminal device performs a cell search on the first frequency point.
  • the terminal device performs cell search at the first frequency point in the following two ways:
  • Network slicing is carrier granular deployment, that is, the cell searched on the carrier must support the network slicing.
  • the terminal device After the terminal device searches for a cell on the designated carrier, it puts the cell that meets the cell selection S criterion into the candidate cell set.
  • the terminal device may subsequently sort the cells in the candidate cell set according to the cell reselection R criterion, and then select the cell with the highest ranking. If the candidate cell set is empty, the terminal device selects the carrier with the second highest carrier priority in the first network slice (it can be understood as the carrier only lower than the highest priority carrier) for cell search, for example, cell search on 2.6GHz , And repeat the aforementioned process until the cell is selected.
  • Network slicing is deployed at regional granularity, that is, the cell searched on the carrier may not support the network slicing.
  • the terminal device After the terminal device searches for a cell on the designated carrier, it puts the cells that support the network slice and meet the cell selection S criterion into the candidate cell set. The terminal device may subsequently sort the cells in the candidate cell set according to the cell reselection R criterion, and select the cell with the highest ranking. If the candidate cell set is empty, the terminal device selects the carrier with the second highest carrier priority in the first network slice (it can be understood as the carrier only lower than the carrier with the highest priority) for cell search, and repeats the aforementioned The process to arrive, until the cell is selected.
  • the carrier is taken as an example for description. In fact, carrier can be replaced with frequency.
  • the access network device can determine the priority of each frequency point in at least one frequency point for the RSA ID, and the terminal device can perform corresponding processing. Specifically, after obtaining the sixth message, the terminal device finds the corresponding RSA ID according to the identifier of the first network slice, and then obtains the priority of the RSA ID on different frequencies. For example, the terminal device finds the first frequency point with the highest priority corresponding to the RSA ID, and then performs cell search at the first frequency point, and the subsequent operations are the same as above.
  • the first network slice may be obtained by the terminal device using the foregoing method of selecting the network slice, or may be selected according to service requirements, which is not limited.
  • the NAS layer of the terminal device notifies that the service of the first network slice needs to be initiated, that is, the NAS layer informs the AS layer of the identification of the first network slice. It is assumed here that the terminal device has already obtained the mapping relationship between the RSA ID and at least one network slice when accessing other access network devices before. For example, the terminal device has previously accessed the first access network device, and the first access network device The mapping relationship between one or more sets of RSA ID and at least one network slice is sent to the terminal device.
  • the mapping relationship between one or more sets of RSA IDs and at least one network slice provided by the first access network device for example: RSA ID#1 corresponds to S-NSSAI#1 and S-NSSAI#2, RSA ID #2 corresponds to S-NSSAI#3, S-NSSAI#4, and S-NSSAI#5.
  • the terminal device receives the priority of each network slice supported by each frequency point broadcast by the current access network device, or the priority of each network slice on each frequency point.
  • the current access network equipment broadcasts RSA ID#1 at 4.9GHz as a high priority, and RSA ID#1 at 2.6GHz as a low priority.
  • the terminal device wants to access S-NSSAI#2 (assuming that S-NSSAI#2 is the identifier of the first network slice), then the terminal device will use the aforementioned mapping relationship obtained from the first access network device (RSA ID#1 corresponds to S-NSSAI#1). -NSSAI#1 and S-NSSAI#2), you can find that S-NSSAI#2 corresponds to RSA ID#1, and based on the frequency priority of RSA ID#1 broadcast by the current access network device, you can find RSA ID# The high-priority frequency of 1 is 4.9 GHz, and the terminal device first performs cell search at 4.9 GHz. Only when a suitable cell cannot be searched for on 4.9GHz, the terminal device will search for a cell on 2.6GHz.
  • the embodiments of the present application also provide corresponding devices, and the devices include corresponding modules for executing the foregoing embodiments.
  • the module can be software, hardware, or a combination of software and hardware. It can be understood that the technical features described in the method embodiments are also applicable to the following device embodiments.
  • Fig. 9 is a schematic block diagram of a device according to an embodiment of the present application.
  • the device can be a terminal device or a component of a terminal device (for example, an integrated circuit, a chip, etc.).
  • the device may also be a network device (the network device may be an access network device or a core network element), or a component of the network device (for example, an integrated circuit, a chip, etc.).
  • the device may also be another communication module, which is used to implement the method in the method embodiment of the present application.
  • the apparatus 1700 may include: a processing module 1702 (processing unit).
  • the device 1700 may further include a sending module 1701 (sending unit), a receiving module 1704 (receiving unit), and a storage module 1703 (storing unit).
  • sending module 1701 and the receiving module 1704 can form a transceiver unit and have the functions of receiving and sending at the same time.
  • the processing module 1702 may be a processor.
  • the sending module 1701 may be a transmitter.
  • the receiving module 1704 may be a receiver. The receiver and transmitter can be integrated to form a transceiver.
  • one or more modules as shown in Figure 9 may be implemented by one or more processors, or by one or more processors and memories; or by one or more processors It may be implemented with a transceiver; or implemented by one or more processors, memories, and transceivers, which is not limited in the embodiment of the present application.
  • the processor, memory, and transceiver can be set separately or integrated.
  • the device has the function of implementing the terminal device described in the embodiment of this application.
  • the device includes a module or unit or means corresponding to the terminal device executing the steps related to the terminal device described in the embodiment of this application.
  • the function Or a unit or means (means) can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • the device has the function of implementing the network device described in the embodiment of this application.
  • the device includes the module or unit or means corresponding to the network device executing the steps related to the network device described in the embodiment of this application.
  • the functions or units or means (means) can be realized by software, or by hardware, or by hardware executing corresponding software, or by a combination of software and hardware.
  • each module in the apparatus 1700 in the embodiment of the present application may be used to execute the method described in FIG. 2 in the embodiment of the present application.
  • an apparatus 1700 may include: a sending module 1701 and a processing module 1702.
  • the processing module 1702 is configured to broadcast a first identifier, and the first identifier is used to identify information about a network slice of the first access network.
  • the sending module 1701 is configured to send a radio resource control RRC message to a terminal device, where the RRC message includes the information of the at least one first network slice corresponding to the first identifier.
  • the apparatus 1700 further includes a receiving module 1704.
  • the receiving module 1704 is configured to receive a request message from the terminal device before sending an RRC message to the terminal device, and the request message is used to request at least one first network slice corresponding to the first identifier. information.
  • the RRC message further includes a second identifier, and information about at least one second network slice corresponding to the second identifier, and the second identifier is used to identify information about the network slice of the second access network.
  • the receiving module 1704 is further configured to receive a first message from the second access network device, the first message including the second identifier, and at least one corresponding to the second identifier Information about the second network slice.
  • the apparatus 1700 includes a processing module 1702 and a sending module 1701.
  • the processing module 1702 is configured to determine the priority of each network slice in at least one network slice for the first frequency point.
  • the sending module 1701 is configured to send a fifth message, the fifth message including the first frequency point, the identifier of each network slice, and the priority corresponding to each network slice.
  • the apparatus 1700 includes a processing module 1702 and a sending module 1701.
  • the processing module 1702 is configured to determine the priority of each frequency point in at least one frequency point for the first network slice.
  • the sending module 1701 is configured to send a sixth message.
  • the sixth message includes the identifier of the first network slice, the identifier of each frequency point, and the priority corresponding to each frequency point.
  • the apparatus 1700 may correspond to the method of accessing network equipment in the foregoing method embodiment, for example, the method in FIG. 2, and the foregoing and other management operations and/or functions of each module in the apparatus 1700 are respectively
  • the beneficial effects in the foregoing method embodiment can also be achieved. For the sake of brevity, details are not described here.
  • an apparatus 1700 may include: a receiving module 1704 and a processing module 1702.
  • the processing module 1702 is configured to obtain a first identifier, and the first identifier is used to identify information about a network slice of the first access network.
  • the receiving module 1704 is configured to receive an RRC message from a first access network device, where the RRC message includes information about at least one first network slice corresponding to the first identifier.
  • the device 1700 further includes a sending module 1701.
  • the sending module 1701 is configured to send a request message to the first access network device, where the request message is used to request information about at least one first network slice corresponding to the first identifier.
  • the RRC message further includes a second identifier, and information about at least one second network slice corresponding to the second identifier, and the second identifier is used to identify information about the network slice of the second access network.
  • the apparatus 1700 includes a processing module 1702 and a receiving module 1704.
  • the receiving module 1704 is configured to receive a paging message from a network device, where the paging message includes information about the first network slice.
  • the processing module 1702 is configured to perform cell reselection if the cell where the device 1700 is currently located does not support the first network slice.
  • the processing module 1702 is configured to perform cell reselection, including: performing cell reselection according to a first mapping relationship, where the first mapping relationship includes information about the first network slice and information about the second network slice. Information, the information of the first network slice and the information of the second network slice have a remapping relationship.
  • the processing module 1702 is configured to perform cell reselection according to the first mapping relationship, including: if the cell where the device 1700 is currently located supports the second network slice, initiating a random access procedure in the current cell; if The cell where the device 1700 is currently located does not support the second network slice, and a cell that supports the second network slice is selected.
  • the device 1700 further includes a sending module 1701.
  • the sending module 1701 is configured to send a second message to the network device, where the second message includes the information of the first network slice and the information of the second network slice, or the second message includes all information. Describe the information of the second network slice.
  • the sending module 1701 is further configured to send a third message to the network device, where the third message is used to notify the terminal device that the cell selection failed.
  • the apparatus 1700 includes a processing module 1702.
  • the processing module 1702 is configured to obtain priority information of each network slice in at least one network slice.
  • the processing module 1702 is further configured to perform cell selection or cell reselection according to the priority information of each network slice.
  • the apparatus 1700 includes a processing module 1702.
  • the processing module 1702 is configured to obtain the priority of each frequency point in at least one frequency point of the first network slice.
  • the processing module 1702 is further configured to perform cell search on the first frequency point, where the first frequency point is the frequency point with the highest priority among the at least one frequency point.
  • the processing module 1702 is further configured to perform a cell search on a second frequency point if no cell is found on the first frequency point, and the priority of the second frequency point is lower than that of the first frequency point.
  • One frequency point is further configured to perform a cell search on a second frequency point if no cell is found on the first frequency point, and the priority of the second frequency point is lower than that of the first frequency point.
  • the device 1700 further includes a receiving module 1704.
  • the transceiving module 1701 is configured to obtain the priority of each frequency point in at least one frequency point of the first network slice, including: invoking the receiving module 1704 to receive a sixth message from a network device, in the sixth message It includes the identifier of the first network slice, the identifier of each frequency point, and the priority corresponding to each frequency point.
  • the device 1700 may correspond to the method of the terminal device in the foregoing method embodiment, for example, the method in FIG. 2 or FIG. 7, and the foregoing and other management operations and/or functions of each module in the device 1700
  • the beneficial effects in the foregoing method embodiment can also be achieved.
  • details are not repeated here.
  • an apparatus 1700 may include: a sending module 1701 and a processing module 1702.
  • the processing module 1702 is configured to determine the priority of each network slice in at least one network slice.
  • the sending module 1701 is configured to send a fourth message, where the fourth message includes the identifier of each network slice and the priority corresponding to each network slice.
  • the processing module 1702 is further configured to, if a cell is not found on the first frequency point, the fourth message at the second frequency point is a contactless message sent by the core network element to the terminal device. Incoming message
  • the apparatus 1700 may correspond to the method of the core network network element in the foregoing method embodiment, for example, the method in FIG. 8, and the foregoing and other management operations and/or functions of each module in the apparatus 1700 are respectively
  • the beneficial effects in the foregoing method embodiment can also be achieved. For the sake of brevity, details are not described here.
  • FIG. 10 shows a schematic diagram of the structure of a device.
  • the apparatus 1500 may be a network device (the network device may be an access network device or a core network network element), a terminal device, or a chip, a chip system, or a processor that supports the network device to implement the above method. It may also be a chip, a chip system, or a processor that supports the terminal device to implement the foregoing method.
  • the device can be used to implement the method described in the foregoing method embodiment, and for details, please refer to the description in the foregoing method embodiment.
  • the apparatus 1500 may include one or more processors 1501, and the processor 1501 may also be referred to as a processing unit, which may implement certain control functions.
  • the processor 1501 may be a general-purpose processor or a special-purpose processor. For example, it can be a baseband processor or a central processing unit.
  • the baseband processor can be used to process communication protocols and communication data
  • the central processor can be used to control communication devices (such as core network elements, base stations, baseband chips, terminals, terminal chips, DU or CU, etc.), Execute the software program and process the data of the software program.
  • the processor 1501 may also store instructions and/or data 1503, and the instructions and/or data 1503 may be executed by the processor, so that the apparatus 1500 executes the above method embodiments. Described method.
  • the processor 1501 may include a transceiver unit for implementing receiving and sending functions.
  • the transceiver unit may be a transceiver circuit, or an interface, or an interface circuit.
  • the transceiver circuits, interfaces, or interface circuits used to implement the receiving and transmitting functions can be separate or integrated.
  • the foregoing transceiver circuit, interface, or interface circuit can be used for code/data reading and writing, or the foregoing transceiver circuit, interface, or interface circuit can be used for signal transmission or transmission.
  • the apparatus 1500 may include a circuit, and the circuit may implement the sending or receiving or communication function in the foregoing method embodiment.
  • the device 1500 may include one or more memories 1502, on which instructions 1504 may be stored, and the instructions may be executed on the processor, so that the device 1500 executes the foregoing method embodiments. Described method.
  • data may also be stored in the memory.
  • instructions and/or data may also be stored in the processor.
  • the processor and the memory can be provided separately or integrated together. For example, the corresponding relationship described in the foregoing method embodiment may be stored in a memory or in a processor.
  • the device 1500 may further include a transceiver 1505 and/or an antenna 1506.
  • the processor 1501 may be referred to as a processing unit, and controls the device 1500.
  • the transceiver 1505 may be called a transceiver unit, a transceiver, a transceiver circuit or a transceiver, etc., for implementing the transceiver function.
  • an apparatus 1500 for example, an integrated circuit, a wireless device, a circuit module, or a terminal device, etc.
  • an apparatus 1500 can be used to implement the method executed by the access network device in the embodiment of the present application, or to implement The method executed by the terminal device or the method executed by the core network element.
  • the processor and transceiver described in this application can be implemented in integrated circuit (IC), analog IC, radio frequency integrated circuit RFIC, mixed signal IC, application specific integrated circuit (ASIC), printed circuit board ( printed circuit board, PCB), electronic equipment, etc.
  • the processor and transceiver can also be manufactured using various IC process technologies, such as complementary metal oxide semiconductor (CMOS), nMetal-oxide-semiconductor (NMOS), and P-type Metal oxide semiconductor (positive channel metal oxide semiconductor, PMOS), bipolar junction transistor (BJT), bipolar CMOS (BiCMOS), silicon germanium (SiGe), gallium arsenide (GaAs), etc.
  • CMOS complementary metal oxide semiconductor
  • NMOS nMetal-oxide-semiconductor
  • PMOS bipolar junction transistor
  • BiCMOS bipolar CMOS
  • SiGe silicon germanium
  • GaAs gallium arsenide
  • the device described in the above embodiment may be a core network element, an access device, or a terminal device, but the scope of the device described in this application is not limited to this, and the structure of the device may not be limited by FIG. 10.
  • the device can be a stand-alone device or can be part of a larger device.
  • the device may be:
  • the IC collection may also include storage components for storing data and/or instructions;
  • ASIC such as modem (MSM)
  • FIG. 11 is a schematic structural diagram of an access network device provided by an embodiment of the present application.
  • it may be a schematic structural diagram of a base station 3000.
  • the base station 3000 can be applied to the system shown in FIG. 1 to perform the functions of the access network device in the foregoing method embodiment.
  • the access network device 1100 may include a CU, a DU, and an active antenna unit (AAU).
  • CU and DU can communicate through interfaces, where the control plane (CP) interface can be Fs-C, such as F1-C, and the user plane (UP) interface can be Fs-U, such as F1 -U.
  • CP control plane
  • UP user plane
  • FIG. 11 is only an example, and does not limit the scope of protection of this application.
  • the deployment form may also be DU deployment in a 5G BBU computer room, CU centralized deployment or DU centralized deployment, and CU higher-level centralized deployment.
  • the AAU may include a transceiver unit 1101, which corresponds to the receiving unit 1020 and the sending unit 1010 in FIG. 10.
  • the transceiver unit 1101 may also be referred to as a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 1111 and a radio frequency unit 1112.
  • the transceiver unit 1101 may include a receiving unit and a transmitting unit, the receiving unit may correspond to a receiver (or receiver, receiving circuit), and the transmitting unit may correspond to a transmitter (or transmitter or transmitting circuit).
  • the AAU is mainly used for sending and receiving of radio frequency signals and conversion between radio frequency signals and baseband signals, for example, for sending messages or information in the foregoing embodiments to terminal devices.
  • the CU and DU can implement internal processing functions, called the processing unit 1102, which is used to perform baseband processing, control the base station, and so on.
  • the AAU, the CU, and the DU may be physically set together, or may be physically separated, that is, a distributed base station.
  • the CU and DU are the control centers of the access network equipment, and may also be called processing modules (or processing units), which may correspond to the processing module 1702, and are mainly used to complete baseband processing functions, such as channel coding, multiplexing, and modulation. Spread spectrum, etc.
  • the CU and DU (processing module 1702) 1102 may be used to control the access network device 1100 to execute the operation procedure of the access network device (for example, the first access network device) in the foregoing method embodiment.
  • the CU and DU may be composed of one or more single boards, and multiple single boards may jointly support a radio access network of a single access standard (for example, an LTE system, or a 5G system), or they may be separate Support wireless access networks of different access standards.
  • the CU and DU further include a memory 1121 and a processor 1122.
  • the memory 1121 is used to store necessary instructions and data.
  • the processor 1122 is used to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the access network device in the foregoing method embodiment.
  • the memory 1121 and the processor 1122 may serve one or more boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.
  • the above-mentioned CU and DU1102 can be used to perform the actions described in the previous method embodiments implemented by the access network device, and the AAU can be used to perform the access network device described in the previous method embodiment to send to or from the terminal device Received action.
  • the AAU can be used to perform the access network device described in the previous method embodiment to send to or from the terminal device Received action.
  • the access network equipment is not limited to the form shown in FIG. 11, but may also be in other forms: for example, including BBU and adaptive radio unit (ARU), or including BBU and active antenna unit (active antenna unit). , AAU); it can also be customer premises equipment (CPE), or other forms, which are not limited in this application.
  • BBU and adaptive radio unit ARU
  • BBU and active antenna unit active antenna unit
  • CPE customer premises equipment
  • the access network device 1100 shown in FIG. 11 can implement the access network device functions involved in the foregoing method embodiments (for example, FIG. 2 to FIG. 8).
  • the operations and/or functions of each unit in the access network device 1100 are respectively for implementing the corresponding processes executed by the access network device in the method embodiment of the present application.
  • detailed descriptions are appropriately omitted here.
  • the structure of the access network device illustrated in FIG. 11 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other types of access network equipment structures that may appear in the future.
  • FIG. 12 provides a schematic structural diagram of a terminal device.
  • the terminal device can be applied to the scenario shown in FIG. 1.
  • FIG. 12 only shows the main components of the terminal device.
  • the terminal device 1600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.
  • the processor is mainly used to process the communication protocol and communication data, and to control the entire terminal, execute the software program, and process the data of the software program.
  • the memory is mainly used to store software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves.
  • Input and output devices such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.
  • the processor can read the software program in the storage unit, parse and execute the instructions of the software program, and process the data of the software program.
  • the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit.
  • the radio frequency circuit processes the baseband signal to obtain a radio frequency signal and sends the radio frequency signal through the antenna in the form of electromagnetic waves. .
  • the radio frequency circuit receives the radio frequency signal through the antenna, the radio frequency signal is further converted into a baseband signal, and the baseband signal is output to the processor, and the processor converts the baseband signal into data and performs processing on the data. deal with.
  • FIG. 12 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories.
  • the memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present invention.
  • the processor may include a baseband processor and a central processing unit.
  • the baseband processor is mainly used to process communication protocols and communication data.
  • the central processing unit is mainly used to control the entire terminal device and execute Software program, processing the data of the software program.
  • the processor in FIG. 12 integrates the functions of the baseband processor and the central processing unit.
  • the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as a bus.
  • the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses.
  • the baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip.
  • the central processing unit can also be expressed as a central processing circuit or a central processing chip.
  • the function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.
  • the antenna and control circuit with the transceiving function can be regarded as the transceiving unit 1611 of the terminal device 1600, and the processor with the processing function can be regarded as the processing unit 1612 of the terminal device 1600.
  • the terminal device 1600 includes a transceiver unit 1611 and a processing unit 1612.
  • the transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on.
  • the device for implementing the receiving function in the transceiver unit 1611 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiver unit 1611 as the sending unit, that is, the transceiver unit 1611 includes a receiving unit and a sending unit.
  • the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc.
  • the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.
  • the foregoing receiving unit and sending unit may be an integrated unit or multiple independent units.
  • the above-mentioned receiving unit and sending unit may be in one geographic location, or may be scattered in multiple geographic locations.
  • the processor in the embodiment of the present application may be an integrated circuit chip with signal processing capability.
  • the steps of the foregoing method embodiments may be completed by hardware integrated logic circuits in the processor or instructions in the form of software.
  • the above-mentioned processor may be a general-purpose processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other Programming logic devices, discrete gates or transistor logic devices, discrete hardware components can also be system on chip (SoC), central processor unit (CPU), or network processor (network processor).
  • SoC system on chip
  • CPU central processor unit
  • network processor network processor
  • processor can also be a digital signal processing circuit (digital signal processor, DSP), can also be a microcontroller (microcontroller unit, MCU), can also be a programmable controller (programmable logic device, PLD) or other Integrated chip.
  • DSP digital signal processor
  • MCU microcontroller unit
  • PLD programmable controller
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present application may be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field, such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the processing unit used to execute these technologies at a communication device can be implemented in one or more general-purpose processors, DSPs, digital signal processing devices, ASICs, Programmable logic device, FPGA, or other programmable logic device, discrete gate or transistor logic, discrete hardware component, or any combination of the foregoing.
  • the general-purpose processor may be a microprocessor.
  • the general-purpose processor may also be any traditional processor, controller, microcontroller, or state machine.
  • the processor can also be implemented by a combination of computing devices, such as a digital signal processor and a microprocessor, multiple microprocessors, one or more microprocessors combined with a digital signal processor core, or any other similar configuration. accomplish.
  • the memory in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM
  • the present application also provides a computer-readable medium on which a computer program is stored, and when the computer program is executed by a computer, the function of any of the foregoing method embodiments is realized.
  • This application also provides a computer program product, which, when executed by a computer, realizes the functions of any of the foregoing method embodiments.
  • the present application also provides a system, which includes the aforementioned one or more terminal devices and one or more access network devices.
  • the system may also include core network elements.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a high-density digital video disc (digital video disc, DVD)), or a semiconductor medium (for example, a solid state disk, SSD)) etc.
  • system and “network” in this article are often used interchangeably in this article.
  • the term “and/or” in this article is only an association relationship describing the associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, exist alone In the three cases of B, A can be singular or plural, and B can be singular or plural.
  • the character "/" generally indicates that the associated objects before and after are in an "or” relationship.
  • At least one of or “at least one of” herein means all or any combination of the listed items, for example, "at least one of A, B and C", It can mean: A alone exists, B alone exists, C exists alone, A and B exist at the same time, B and C exist at the same time, and there are six cases of A, B and C at the same time, where A can be singular or plural, and B can be Singular or plural, C can be singular or plural.
  • B corresponding to A means that B is associated with A, and B can be determined according to A.
  • determining B based on A does not mean that B is determined only based on A, and B can also be determined based on A and/or other information.
  • the corresponding relationships shown in the tables in this application can be configured or pre-defined.
  • the value of the information in each table is only an example, and can be configured to other values, which is not limited in this application.
  • the corresponding relationship shown in some rows may not be configured.
  • appropriate deformation adjustments can be made based on the above table, such as splitting, merging, and so on.
  • the names of the parameters shown in the titles in the above tables may also be other names that can be understood by the communication device, and the values or expressions of the parameters may also be other values or expressions that can be understood by the communication device.
  • other data structures can also be used, such as arrays, queues, containers, stacks, linear tables, pointers, linked lists, trees, graphs, structures, classes, heaps, hash tables, or hash tables. Wait.
  • the “pre-defined” in the embodiments of the present application can be understood as definition, pre-definition, storage, pre-storage, pre-negotiation, pre-configuration, curing, or pre-fired.
  • the configuration in the embodiments of this application can be understood as being notified through RRC signaling, MAC signaling, and physical layer information, where the physical layer information can be transmitted through PDCCH or PDSCH.
  • the disclosed system, device, and method can be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium.
  • the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disks or optical disks and other media that can store program codes. .

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Abstract

本申请提供了一种通信方法及通信装置，通过RRC消息向终端设备发送与第一标识对应的至少一个第一网络切片的信息，能够满足终端的通信需求，且有助于减少广播开销。该方法包括：第一接入网设备广播第一标识，所述第一标识用于标识第一接入网网络切片的信息；所述第一接入网设备向终端设备发送无线资源控制RRC消息，所述RRC消息包括所述与所述第一标识对应的至少一个第一网络切片的信息。

Description

通信方法及通信装置 技术领域
本申请涉及通信领域，并且更具体地，涉及一种通信方法及通信装置。
背景技术
在第五代(5th Generation，5G)通信系统中，引入了网络切片(slice)。一个网络切片满足某一类或一个用例的连接通信服务需求。5G系统可以由满足不同连接能力的大量网络切片组成。网络切片概念的引入，将运营商的物理网络划分为多个虚拟网络。每个虚拟网络根据不同的服务质量需求，比如时延、带宽、安全性和可靠性等划分，以灵活应对不同的网络应用场景。网络切片作为5G网络的必选特性，是端到端的概念，一个网络切片包括着无线接入网(radio access network，RAN)部分和核心网部分。
不同的网络切片可以通过网络切片标识表征，比如，单个网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)。每个S-NSSAI由切片/业务类型(slice/service type，SST)和切片区分(slice differentiator，SD)构成，其中SST用于区分业务，SD用于区分租户。当前核心网的接入管理功能(access management function，AMF)将允许的单个网络切片选择辅助信息(allowed S-NSSAIs)发送给终端设备，以便终端设备确定可以享受哪些切片的服务。当前第三代合作伙伴计划(3rd generation partnership project，3GPP)定义的网络切片无法适应终端设备的通信需求。
发明内容
有鉴于此，本申请提供一种通信方法及通信装置，以适应终端设备的通信需求。
第一方面，提供了一种通信方法，该方法可以由第一接入网设备执行，也可以由第一接入网设备中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：第一接入网设备广播第一标识，第一标识用于标识第一接入网网络切片的信息；第一接入网设备向终端设备发送无线资源控制RRC消息，RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。第一接入网设备通过RRC消息向终端设备发送与第一标识对应的至少一个第一网络切片的信息，这样无论终端设备是否在TA区域内发生移动，都能够适应终端设备的通信需求。并且，这里，第一接入网设备广播第一标识，并通过RRC消息发送与第一标识对应的至少一个第一网络切片的信息，不需要在广播消息中包括与第一标识对应的至少一个第一网络切片的信息，有助于节省广播开销。
第一接入网设备可以主动向终端设备发送与第一标识对应的至少一个第一网络切片的信息，也可以基于终端设备的请求消息发送。在一种可能的实现方式中，在第一接入网设备向终端设备发送RRC消息之前，所述方法还包括：第一接入网设备接收来自所述终端设备的请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。这里，第一接入网设备可以在接收到终端设备的请求消息后，基于请求消息向终 端设备发送与第一标识对应的至少一个第一网络切片的信息，从而可以针对性地发送与第一标识对应的至少一个第一网络切片的信息。
第一接入网设备还可以将邻区支持的网络切片的信息发送给终端设备。可选地，所述RRC消息还包括第二标识，以及与第二标识对应的至少一个第二网络切片的信息，第二标识用于标识第二接入网网络切片的信息。这样，终端设备在移动到第二接入网设备的覆盖范围后，可以不需要再向第二接入网设备请求上述与第二标识对应的至少一个第二网络切片的信息。
在本申请实施例中，接入网设备之间可以交互各自广播的标识以及与标识对应的网络切片的信息。在一种可能的实现方式中，所述方法还包括：第一接入网设备接收来自第二接入网设备的第一消息，所述第一消息包括所述第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息。这样，第一接入网设备从第二接入网设备获取第二消息，使得终端设备可以提前获取第二接入网设备的、与第二标识对应的至少一个第二网络切片的信息，从而可以减少终端设备触发申请与第二标识对应的至少一个第二网络切片的信息的流程，有助于节省终端设备的功耗。
在一种可能的实现方式中，所述方法还包括：第一接入网设备向第二接入网设备发送与第一标识对应的至少一个第一网络切片的信息。这样，第一接入网设备向第二接入网设备发送与第一标识对应的至少一个第一网络切片的信息，使得处于第二接入网设备覆盖范围的终端设备可以提前获取第一接入网设备的、与第一标识对应的至少一个第一网络切片的信息，从而可以减少该终端设备触发申请与第一标识对应的至少一个第一网络切片的信息的流程，有助于节省终端设备的功耗。
第二方面，提供了一种通信方法，该方法可以由终端设备执行，也可以由终端设备中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：终端设备获取第一标识，所述第一标识用于标识第一接入网网络切片的信息；终端设备接收来自第一接入网设备的RRC消息，RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。这里，终端设备接收第一接入网设备通过广播发送的第一标识，并通过RRC消息获取与第一标识对应的至少一个第一网络切片的信息，这样无论终端设备是否在TA区域内发生移动，都能够适应终端设备的通信需求，并且，有助于节省第一接入网设备的广播开销。
在一种可能的实现方式中，在终端设备接收来自第一接入网设备的RRC消息之前，所述方法还包括：终端设备向第一接入网设备发送请求消息，请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。这里，终端设备可以主动向第一接入网设备请求与标识对应的至少一个第一网络切片的信息，从而可以针对性地获取与第一标识对应的至少一个第一网络切片的信息。
可选地，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。这样，终端设备在移动到第二接入网设备的覆盖范围后，可以提前获取第二接入网设备的、与第二标识对应的至少一个第二网络切片的信息，从而可以减少终端设备触发申请与第二标识对应的至少一个第二网络切片的信息的流程，有助于节省终端设备的功耗。
第三方面，提供了一种通信方法，该方法可以由终端设备执行，也可以由终端设备中 的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：终端设备接收来自网络设备的寻呼消息，所述寻呼消息包括第一网络切片的信息；如果终端设备当前所在小区不支持所述第一网络切片，所述终端设备进行小区重选，有助于终端设备选择合适的小区。
在一种可能的实现方式中，终端设备进行小区重选，包括：终端设备根据第一映射关系进行小区重选，所述第一映射关系包括所述第一网络切片的信息，以及第二网络切片的信息，所述第一网络切片的信息和所述第二网络切片的信息存在重映射关系。第一映射关系用于表征网络切片与网络切片之间的映射关系。对于终端设备无法找到支持寻呼消息中的第一网络切片的小区或接入网设备的情况，如果终端设备收到过网络切片重映射的第一映射关系，则可以利用第一映射关系作进一步小区重选，有助于提高选择到合适小区的概率。
可选地，所述终端设备根据第一映射关系进行小区重选，包括：如果所述终端设备当前所在小区支持所述第二网络切片，终端设备在当前所在小区发起随机接入流程；如果终端设备当前所在小区不支持所述第二网络切片，终端设备选择支持所述第二网络切片的小区。这样，终端设备通过判断当前所在小区是否支持第二网络切片，有助于提高选择到合适小区的概率。
可选地，若所述终端设备选择支持所述第二网络切片的小区，所述方法还包括：终端设备向网络设备(接入网设备或核心网网元)发送第二消息，第二消息包括所述第一网络切片的信息和所述第二网络切片的信息，或者，第二消息包括所述第二网络切片的信息。也就是说，如果终端设备选择支持第二网络切片的小区，则可以将第二网络切片的信息告知给接入网设备或核心网网元，从而使得接入网设备或核心网网元获知终端设备选择的小区。
在一种可能的实现方式中，若所述终端设备选择小区失败，所述方法还包括：终端设备向网络设备发送第三消息，第三消息用于通知所述终端设备选择小区失败。这里，“终端设备选择小区失败”可以包括：利用第一映射关系选择小区失败。也就是说，如果终端设备选择小区失败，可以向接入网设备或核心网网元通知终端设备选择小区失败，从而使得接入网设备或核心网网元得知终端设备选择小区失败。
可选地，所述方法还包括：所述终端设备获取当前所在小区支持的网络切片的信息。当前所在小区支持的网络切片的信息可以包括至少一个网络切片的信息。示例性地，终端设备接收第一接入网设备发送的当前所在小区支持的网络切片的信息，从而可以结合当前所在小区支持的网络切片的信息进行判断。
第四方面，提供了一种通信方法，该方法可以由核心网网元执行，也可以由核心网网元中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：核心网网元确定至少一个网络切片中每个网络切片的优先级；核心网网元发送第四消息，所述第四消息包括所述每个网络切片的标识以及所述每个网络切片对应的优先级。这里，核心网网元可以将每个网络切片的标识以及所述每个网络切片对应的优先级发送给终端设备，以便于终端设备选择更合适的小区。
可选地，所述第四消息是所述核心网网元发送给终端设备的非接入层消息。
第五方面，提供了一种通信方法，该方法可以由终端设备执行，也可以由终端设备中 的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：终端设备获取至少一个网络切片中每个网络切片的优先级信息；所述终端设备根据所述每个网络切片的优先级信息进行小区选择或者小区重选。这里，终端设备可以获取核心网网元发送的每个网络切片的标识以及所述每个网络切片对应的优先级发送给终端设备，以便于选择更合适的小区。
在一种可能的实现方式中，若所述终端设备处于第一小区，其中，所述终端设备根据所述每个网络切片的优先级信息进行小区选择或者小区重选，包括：终端设备在所述至少一个网络切片中选择第一网络切片，第一网络切片的优先级是所述至少一个网络切片中最高的；确定所述第一小区是否支持所述第一网络切片；在所述第一小区不支持所述第一网络切片的情况下，执行小区搜索，得到第二小区，并判断所述第二小区是否支持所述第一网络切片；在所述第二小区支持所述第一网络切片的情况下，将所述第二小区放入候选小区集合，继续搜索执行前述动作直到无法找到新小区为止；在所述候选小区集合不为空的情况下，终端设备选择驻留在候选小区集合中信号最好(例如接收功率最高或者信号强度最高)的小区；在所述候选小区集合为空的情况下，终端设备选择第二网络切片，所述第二网络切片的优先级小于所述第一网络切片的优先级，继续执行小区搜索直到选择到合适的小区为止；在所述第一小区支持所述第一网络切片的情况下，终端设备继续驻留在所述第一小区。第一小区是终端设备当前驻留的小区，终端设备优先考虑第一小区。这样，对于终端设备在处于驻留小区的情况，终端设备也能够结合网络切片对应的优先级选择更合适的小区。
在一种可能的实现方式中，所述终端设备根据所述每个网络切片的优先级信息进行小区选择或者小区重选，包括：所述终端设备在所述至少一个网络切片中选择第一网络切片，所述第一网络切片的优先级是所述至少一个网络切片中最高的；所述终端设备进行小区搜索，得到第三小区；确定所述第三小区是否支持所述第一网络切片；在所述第三小区支持所述第一网络切片的情况下，所述终端设备将所述第三小区放入候选小区集合，继续搜索执行前述动作直到无法找到新小区为止。在所述候选小区集合不为空的情况下，终端设备选择驻留在候选小区集合中信号最好(例如接收功率最高或者信号强度最高)的小区；在所述候选小区集合为空的情况下，所述终端设备选择第二网络切片，所述第二网络切片的优先级小于所述第一网络切片的优先级，继续执行小区搜索直到选择到合适的小区为止。这样，对于终端设备未处于驻留小区的情况，终端设备也能够结合网络切片对应的优先级选择更合适的小区。
可选地，所述终端设备获取至少一个网络切片中每个网络切片的优先级信息，包括：所述终端设备接收来自核心网网元的第四消息，所述第四消息包括所述每个网络切片的标识以及所述每个网络切片对应的优先级，从而可以利用每个网络切片对应的优先级进行小区选择或重选。
第六方面，提供了一种通信方法，该方法可以由接入网设备执行，也可以由接入网设备中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：接入网设备针对第一频点确定至少一个网络切片中每个网络切片的优先级；所述接入网设备发送第五消息，所述第五消息包括所述第一频点，所述每个网络切片的标识，以及所述每个网络切片对应的优先级。这里，接入网设备可以为每个频点对应的至少一个网络切片，确 定每个网络切片的优先级，并将每个网络切片的优先级发送给终端设备，以便于终端设备利用网络切片的优先级选择更合适的小区。
第七方面，提供了一种通信方法，该方法可以由接入网设备执行，也可以由接入网设备中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：接入网设备针对第一网络切片确定至少一个频点中每个频点的优先级；所述接入网设备发送第六消息，所述第六消息中包括所述第一网络切片的标识，所述每个频点的标识，以及所述每个频点对应的优先级。这里，接入网设备可以为每个网络切片对应的至少一个频点，确定每个频点的优先级，并将每个频点的优先级发送给终端设备，以便于终端设备利用频点的优先级选择更合适的小区。
第八方面，提供了一种通信方法，该方法可以由终端设备执行，也可以由终端设备中的装置(例如芯片、处理器、或芯片系统中的一种或多种)执行，该方法包括：终端设备获取针对第一网络切片的至少一个频点中每个频点的优先级；所述终端设备在所述第一频点上进行小区搜索，所述第一频点是所述至少一个频点中优先级最高的频点。这里，终端设备可以根据所述每个频点的优先级，在所述至少一个频点中选择第一频点，所述第一频点是所述至少一个频点中优先级最高的频点。然后，终端设备在第一频点上执行小区搜索，有助于选择更合适的小区。
在一种可能的实现方式中，所述方法还包括：若所述终端设备在所述第一频点上未搜索到小区，所述终端设备在第二频点上进行小区搜索，所述第二频点的优先级低于所述第一频点，从而选择合适的频点进行小区搜索。示例性地，第一频点是最高优先级的频点，第二频点是次高优先级的频点。
可选地，所述终端设备获取针对第一网络切片的至少一个频点中每个频点的优先级，包括：所述终端设备接收来自网络设备的第六消息，所述第六消息中包括所述第一网络切片的标识，所述每个频点的标识，以及所述每个频点对应的优先级。这里，终端设备通过从网络设备获知每个频点对应的优先级，从而能够利用每个频点对应的优先级进行小区选择或重选，有助于选到合适的小区。
第九方面，提供了一种通信装置，该通信装置包括用于执行上述第一方面或第一方面的任意可能的实现方式中的方法的模块；或者，包括用于执行上述第六方面或第六方面的任意可能的实现方式中的方法的模块；或者，包括用于执行上述第七方面或第七方面的任意可能的实现方式中的方法的模块。
第十方面，提供了一种通信装置，该通信装置包括用于执行上述第二方面或第二方面的任意可能的实现方式中的方法的模块；或者，包括用于执行上述第三方面或第三方面的任意可能的实现方式中的方法的模块；或者，包括用于执行上述第五方面或第五方面的任意可能的实现方式中的方法的模块；或者，包括用于执行上述第八方面或第八方面的任意可能的实现方式中的方法的模块。
第十一方面，提供了一种通信装置，该通信装置包括用于执行上述第四方面或第四方面的任意可能的实现方式中的方法的模块。
第十二方面，提供了一种通信装置，包括处理器和接口电路，接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述 第一方面或第一方面的任意可能的实现方式中的方法；或者，用于实现前述第六方面或第六方面的任意可能的实现方式中的方法；或者，用于实现前述第七方面或第七方面的任意可能的实现方式中的方法。
第十三方面，提供了一种通信装置，包括处理器和接口电路，该接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第二方面或第二方面的任意可能的实现方式中的方法；或者，用于实现前述第三方面或第三方面的任意可能的实现方式中的方法；或者，用于实现前述第五方面或第五方面的任意可能的实现方式中的方法；或者，用于实现前述第八方面或第八方面的任意可能的实现方式中的方法。
第十四方面，提供了一种通信装置，包括处理器和接口电路，该接口电路用于接收来自该通信装置之外的其它通信装置的信号并传输至该处理器或将来自该处理器的信号发送给该通信装置之外的其它通信装置，该处理器通过逻辑电路或执行代码指令用于实现前述第四方面或第四方面的任意可能的实现方式中的方法。
第十五方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序或指令，当该计算机程序或指令被执行时，实现上述第一方面至第八方面中任一方面及其任意可能的实现方式中的方法。
第十六方面，提供了一种包含指令的计算机程序产品，当该指令被运行时，实现第一方面至第八方面中任一方面及其任意可能的实现方式中的方法。
第十七方面，提供了一种通信芯片，其中存储有指令，当其在计算机设备上运行时，使得所述通信芯片执行上述第一方面至第八方面中任一方面及其任意可能的实现方式中的方法。
第十八方面，提供了一种通信系统，该通信系统包括前述第十二方面的通信装置、十三方面的通信装置和第十四方面的通信装置中的一项或多项。
附图说明
图1是本申请的实施例可能应用的通信系统的架构示意图；
图2是根据本申请实施例的通信方法的示意性交互图；
图3是根据本申请实施例的切片区域的一个示例图；
图4是根据本申请实施例的切片区域的另一个示例图；
图5是根据本申请实施例的通信方法的一个交互示例图；
图6是根据本申请实施例的通信方法的另一个交互示例图；
图7是根据本申请实施例的另一通信方法的示意性流程图；
图8是根据本申请实施例的又一通信方法的示意性流程图；
图9是根据本申请实施例的一种装置的示意框图；
图10是根据本申请实施例的又一种装置的结构示意图；
图11是本申请实施例提供的一种接入网设备的结构示意图；
图12是本申请实施例提供的一种终端设备的结构示意图。
具体实施方式
下面将结合附图，对本申请中的技术方案进行描述。
在本申请实施例中，“多个”可以理解为“至少两个”或“两个或两个以上”；“多项”可以理解为“至少两项”或“两项或两项以上”。
本申请实施例的技术方案可以应用于各种通信系统，例如：长期演进(long term evolution，LTE)系统、第五代(5th generation，5G)通信系统、新无线(new radio，NR)系统以及未来演进的通信系统。
图1是本申请的实施例可能应用的通信系统的架构示意图。如图1所示，该通信系统包括核心网设备110、接入网设备120和至少一个终端设备(如图1中的终端设备130和终端设备140)。终端设备通过无线的方式与接入网设备相连，接入网设备通过无线或有线方式与核心网设备连接。核心网设备与接入网设备可以是独立的不同的物理设备，也可以是将核心网设备的功能与接入网设备的逻辑功能集成在同一个物理设备上，还可以是一个物理设备上集成了部分核心网设备的功能和部分的接入网设备的功能。终端设备可以是固定位置的，也可以是可移动的。图1只是示意图，该通信系统中还可以包括其它网络设备，如还可以包括无线中继设备和无线回传设备，在图1中未画出。本申请的实施例对该通信系统中包括的核心网设备、接入网设备和终端设备的数量不做限定。
接入网设备是终端设备通过无线方式接入到该通信系统中的接入设备，可以是无线接入网(radio access network，RAN)设备、基站NodeB、演进型基站(evloved NodeB,eNB)、5G通信系统中的基站(gNB)、传输点、未来通信系统中的基站或无线保真(wireless fidelity，Wi-Fi)系统中的接入节点，5G系统中的基站的一个或一组(包括多个天线面板)天线面板，或者，还可以为构成gNB或传输点的网络节点，如基带单元(baseband unit，BBU)，集中式单元(centralized unit，CU)，或，分布式单元(distributed unit，DU)等。本申请的实施例对接入网设备所采用的具体技术和具体设备形态不做限定。在一些部署中，gNB可以包括CU和DU。gNB还可以包括有源天线单元(active antenna unit，AAU)。CU实现gNB的部分功能，DU实现gNB的部分功能。比如，CU负责处理高层协议和服务，以实现无线资源控制(radio resource control，RRC)，服务数据适配层(service data adaptation protocol，SDAP)层的功能，分组数据汇聚层协议(packet data convergence protocol，PDCP)层的功能。DU负责处理低层协议和服务，以实现无线链路控制(radio link control，RLC)层、媒体接入控制(media access control，MAC)层和物理(physical，PHY)层的功能。AAU实现部分物理层处理功能、射频处理及有源天线的相关功能。由于RRC层的信息最终会变成PHY层的信息，或者，由PHY层的信息转变而来，因而，在这种架构下，高层信令，如RRC层信令，也可以认为是由DU发送的，或者，由DU和AAU发送的。可以理解的是，接入网设备可以为包括CU节点、DU节点、AAU节点中一项或多项的设备。此外，CU可以作为接入网中的网络设备，也可以作为核心网(core network，CN)中的网络设备，本申请对此不做限定。
接入网设备为小区提供服务，终端设备通过接入网设备分配的传输资源(例如，频域资源，或者说，频谱资源)与小区进行通信。该小区可以属于宏基站(例如，宏eNB或宏gNB等)，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(metro 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。
终端设备也可以称为终端terminal、用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。终端设备可以是手机(mobile phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(virtual reality，VR)终端设备、增强现实(augmented reality，AR)终端设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等等。本申请的实施例对终端设备所采用的具体技术和具体设备形态不做限定。
接入网设备和终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上；还可以部署在空中的飞机、气球和卫星上。本申请的实施例对接入网设备和终端设备的应用场景不做限定。
本申请的实施例可以适用于下行信号传输，也可以适用于上行信号传输，还可以适用于设备到设备(device to device，D2D)的信号传输。对于下行信号传输，发送设备是接入网设备，对应的接收设备是终端设备。对于上行信号传输，发送设备是终端设备，对应的接收设备是接入网设备。对于D2D的信号传输，发送设备是终端设备，对应的接收设备也是终端设备。
接入网设备和终端设备之间以及终端设备和终端设备之间可以通过授权频谱(licensed spectrum)进行通信，也可以通过免授权频谱(unlicensed spectrum)进行通信，也可以同时通过授权频谱和免授权频谱进行通信。接入网设备和终端设备之间以及终端设备和终端设备之间可以通过6千兆赫(gigahertz，GHz)以下的频谱进行通信，也可以通过6G以上的频谱进行通信，还可以同时使用6G以下的频谱和6G以上的频谱进行通信。本申请的实施例对接入网设备和终端设备之间所使用的频谱资源不做限定。
在本申请实施例中，如果没有特殊说明，网络设备均指接入网设备。终端设备或网络设备包括硬件层、运行在硬件层之上的操作系统层，以及运行在操作系统层上的应用层。该硬件层包括中央处理器(central processing unit，CPU)、内存管理单元(memory management unit，MMU)和内存(也称为主存)等硬件。该操作系统可以是任意一种或多种通过进程(process)实现业务处理的计算机操作系统，例如，Linux操作系统、Unix操作系统、Android操作系统、iOS操作系统或windows操作系统等。该应用层包含浏览器、通讯录、文字处理软件、即时通信软件等应用。并且，本申请实施例并未对本申请实施例提供的方法的执行主体的具体结构特别限定，只要能够通过运行记录有本申请实施例提供的方法的代码的程序，以根据本申请实施例提供的方法进行通信即可，例如，本申请实施例提供的方法的执行主体可以是终端设备或网络设备，或者，是终端设备或网络设备中能够调用程序并执行程序的功能模块(例如处理器、芯片、或芯片系统等)。
另外，本申请的各个方面或特征可以实现成方法、装置或使用标准编程和/或工程技术的制品。本申请中使用的术语“制品”涵盖可从任何计算机可读器件、载体或介质访问的计算机程序。例如，计算机可读介质可以包括，但不限于:磁存储器件(例如，硬盘、软盘或磁带等)，光盘(例如，压缩盘(compact disc，CD)、数字通用盘(digital versatile  disc，DVD)等)，智能卡和闪存器件(例如，可擦写可编程只读存储器(erasable programmable read-only memory，EPROM)、卡、棒或钥匙驱动器等)。另外，本文描述的各种存储介质可代表用于存储信息的一个或多个设备和/或其它机器可读介质。术语“机器可读介质”可包括但不限于，无线信道和能够存储、包含和/或承载指令和/或数据的各种其它介质。
图2是根据本申请实施例的通信方法200的示意性交互图。可以理解，图2中的终端设备可以是图1中的终端设备(比如，终端设备130或终端设备140)，也可以是指终端设备中的装置(例如处理器、芯片、或芯片系统等)。第一接入网设备可以是图1中的接入网设备120，也可以是指接入网设备中的装置(例如处理器、芯片、或芯片系统等)。还可理解，图2中终端设备与第一接入网设备之间交互的部分或全部信息，或者，第一接入网设备与第二接入网设备之间交互的部分或全部信息，可以携带于已有的消息、信道、信号或信令中，也可以是新定义的消息、信道、信号或信令，对此不作具体限定。如图2所示，所述方法200包括：
S210，第一接入网设备广播第一标识，第一标识用于标识第一接入网网络切片的信息。终端设备可以获得第一接入网设备广播的第一标识。
第一接入网设备可以在系统消息广播第一标识，比如，主信息块(mater information block，MIB)，系统信息块(system information block，SIB)1，或其他SIBx。可选地，第一接入网设备可以在系统消息中广播公共陆地移动网(public land mobile network，PLMN)标识符(identifier，ID)以及对应的第一标识。例如，第一接入网设备广播PLMN ID#1和对应的第一标识#1，第一标识#2；广播PLMN ID#2和对应的第一标识#3。
可选地，当所述第一标识被包含在SIBx中，第一接入网设备可能在终端设备请求的情况下广播所述SIBx。即当终端设备发现SIBx未广播时，终端设备可以通过随机接入过程的消息1(msg1)或消息3(msg3)，向第一接入网设备请求广播所述SIBx或者所述SIBx所在的系统消息(system informtion,SI)。第一接入网设备基于终端设备的请求，广播终端设备请求的所述SI或所述SIBx。
“第一标识用于标识第一接入网网络切片的信息”可以包括：第一标识用于标识第一接入网设备所在的接入网网络切片的区域信息，比如，RAN切片区域(RAN slicing area，RSA)或者RAN部分标识(RAN Part ID)。网络切片可以包括接入网网络切片和核心网网络切片，其中，接入网网络切片可以理解成接入网用于承载网络切片业务的资源，也可以理解成网络切片在接入网侧的标识。因此，第一标识也可以用于标识第一网络切片在接入网侧的标识，即接入网网络切片标识。在跟踪区域(tracking area，TA)内，广播相同第一标识的接入网设备支持相同的至少一个网络切片。因此，第一种理解中，第一接入网网络切片对应的第一标识也可以看作是一个区域标识，即将广播相同第一标识的接入网设备的覆盖区域看作一个区域，所述区域可以支持相同的至少一个网络切片。第二种理解中，第一网络切片对应的第一标识也可以看作是接入网网络切片标识。因此，可以理解，接入网设备可能广播一个第一标识，也可能广播多个第一标识，对此不作限定。每个第一标识和一个网络切片集合(一个网络切片集合包括至少一个网络切片)相对应，且相同接入网设备广播的不同第一标识对应的网络切片集合各不相同。例如，基站1广播第一标识#1，第一标识#1和网络切片集合#1(网络切片集合#1包括网络切片#1，#2)相对应。基站1还广播第一标识#2，第一标识#2和网络切片集合#2(网络切片集合#2包括网络切片#3) 相对应。可以看出，网络切片集合#1和网络切片集合#2包含的网络切片不相同。
或者，“第一标识用于标识第一接入网网络切片的信息”可以间接反映第一接入网设备所在的接入网网络切片的区域信息，比如，在TA范围内，多个广播第一标识的接入网设备所构成的比TA粒度更小的区域范围。一个TA范围内可以划分多个切片区域，每个切片区域支持的网络切片不同。广播相同第一标识的接入网设备支持相同的网络切片列表。例如，基站1，基站2都广播第一标识#1，基站3-基站6都广播第一标识#2，那么说明基站1和2位于相同的接入网切片区域#1，基站3-6位于相同的接入网切片区域#2。
可选地，第一标识可以是RAN切片区域标识(RAN slicing area identifier，RSA ID)，也可以是扩展现有标准中ID的含义。示例性地，第一标识是RAN区域码(RAN area code，RANAC)标识或小区接入组(cell access group，CAG)标识。
S220，第一接入网设备向终端设备发送无线资源控制(radio resource control，RRC)消息，RRC消息包括与第一标识对应的至少一个第一网络切片的信息。对应的，终端设备接收来自第一接入网设备的RRC消息。
与第一标识对应的至少一个第一网络切片的信息可以通过不同的实现方式得到。可选地，与第一标识对应的至少一个第一网络切片的信息可以是操作维护管理(operation administration and maintenance OAM)发送给所述第一接入网设备以及核心网网元的。或者，可选地，第一标识，以及与第一标识对应的至少一个第一网络切片的信息可以是核心网网元分配给第一接入网设备的。或者，可选地，第一接入网设备将支持的至少一个第一网络切片的信息发送给核心网网元，然后获得核心网网元分配的第一标识。可选地，第一标识和至少一个网络切片的信息的对应关系可能在一个跟踪区域TA范围内保持不变。或者，PLMN ID，第一标识以及至少一个网络切片的信息的对应关系可能在一个跟踪区域TA范围内保持不变。这样终端设备在TA范围内移动后，便于终端设备从第三接入网设备(第三接入网设备可以理解为终端设备移动后所在的接入网设备)的广播消息中获取到第一标识。终端设备通过检测发现之前获取过所述第一标识和至少一个第一网络切片的信息的映射关系，从而可以确定第三接入网设备支持的至少一个网络切片的信息。
本申请实施例对“终端设备判断第一接入网设备和该第三接入网设备是否位于相同的TA范围”的行为，以及，“终端设备判断是否获取过第三接入设备广播的第一标识对应的至少一个网络切片的信息”的先后顺序不作限定。
可选地，作为一种实现方式，在终端设备检测是否获取过所述映射关系之前，即终端设备判断是否获取过第三接入设备广播的第一标识对应的至少一个网络切片的信息，终端设备可以先判断第一接入网设备和该第三接入网设备是否位于相同的TA范围。可选地，终端设备可以通过判断第一接入网设备广播的跟踪区域码(tracking area code,TAC)和第三接入网设备广播的TAC是否相同，来确定第一接入网设备和第三接入网设备位于相同的TA范围。如果二者广播的TAC相同，则说明第一接入网设备和第三接入网设备位于相同的TA范围；如果二者广播的TAC不同，则说明第一接入网设备和第三接入网设备位于不同的TA范围。或者，终端设备可以通过判断第一接入网设备广播的PLMN ID和TAC组合，与第三接入网设备广播的PLMN ID和TAC组合是否相同，来确定第一接入网设备和第三接入网设备位于相同的TA范围。如果第一接入网设备广播的PLMN ID和TAC组合，与第三接入网设备广播的PLMN ID和TAC组合相同，则说明第一接入网设备和第三 接入网设备位于相同的TA范围；如果第一接入网设备广播的PLMN ID和TAC组合，与第三接入网设备广播的PLMN ID和TAC组合不同，则说明第一接入网设备和第三接入网设备位于不同的TA范围。如果第一接入网设备和该第三接入网设备位于相同的TA范围，终端设备再检测是否获取过所述映射关系。在第一接入网设备和该第三接入网设备位于相同的TA范围的情况下，如果获取过所述映射关系，则终端设备不需要重新获取所述第一标识和至少一个第一网络切片的信息的映射关系；如果未获取过所述映射关系，则终端设备需要向第三接入网设备申请获取上述映射关系。如果第一接入网设备和该第三接入网设备不属于相同的TA范围，终端设备需要重新获取上述映射关系，例如终端设备接入第三接入网设备，并向第三接入网设备发送请求，以请求第三接入网设备将所述第一标识和至少一个第一网络切片的信息的映射关系发送给自己。
或者，可选地，作为一种实现方式，终端设备先判断是否获取过所述映射关系，即终端设备判断是否获取过第三接入设备广播的第一标识对应的至少一个网络切片的信息。如果获取过所述映射关系，则终端设备接着判断第一接入网设备和该第三接入网设备是否位于相同的TA范围；如果未获取过所述映射关系，则终端设备需要向第三接入网设备申请获取上述映射关系。在获取过所述映射关系的情况下，如果第一接入网设备和该第三接入网设备位于相同的TA范围，则终端设备不需要重新获取所述映射关系；如果第一接入网设备和该第三接入网设备不属于相同的TA范围，则终端设备需要向第三接入网设备申请获取上述映射关系。这里，如果第一接入网设备和该第三接入网设备不属于同一个TA范围，那么即使第一接入网设备与第三接入网设备均广播了第一标识，那么第一接入网设备广播的第一标识对应的至少一个网络切片的信息，与第三接入网设备广播的第一标识对应的至少一个网络切片的信息也可能不同，因此，终端设备需要重新向第三接入网设备获取上述映射关系。
至少一个第一网络切片可以理解为第一标识支持或对应的网络切片列表(slice list)(或网络切片集合)，其中，slice list包括至少一个网络切片的信息。这里作统一说明，本申请实施例的网络切片(比如，第一网络切片，或下文出现的第二网络切片)的信息可以通过单个网络切片选择辅助信息(single network slice selection assistance information，S-NSSAI)或切片/业务类型(slice/service type，SST)标识，或者slice index，或者，也可以利用终端设备可以识别的slice标识，对此不作限定。
其中，RRC消息中可以包括与第一标识对应的slice list。可选地，RRC消息中还可以包括第一标识。换句话说，RRC消息中可以包括第一标识与slice list的映射关系(或对应关系)。例如，RRC消息包含至少一个第一标识，以及至少一个第一标识中每个第一标识对应的至少一个网络切片标识。
可选地，RRC消息中还可以包括每个第一网络切片对应的网络切片索引(slice index)。举例来说，S-NSSAI需要32bit，但是如果一个接入网设备或小区只支持4个slice，那么slice index只需要2bit就可以指示4个slice，从而可以进一步大大减少广播开销。
比如，RRC消息中可能包括的信元如下所示：
RSA ID
slice list
>S-NSSAI
>slice index(optional)
又比如，RRC消息中可能包括的信元(information element，IE)如下所示：
RSA ID list
>RSA ID
>slice list
>>S-NSSAI
>>slice index(optional)
可以理解，RRC消息中包括的slice index可以是可选的。上文是以第一接入网设备通过RRC消息发送与第一标识对应的至少一个第一网络切片的信息的实现方式。可选地，第一接入网设备也可以通过媒介接入控制控制元素(media access control control element，MAC CE)消息，广播消息，非接入层(non-access stratum，NAS)消息，或随机接入过程的消息1或消息3等，发送与第一标识对应的至少一个第一网络切片的信息，对此不作限定。
可选地，第一接入网设备可以向核心网网元发送与第一标识对应的至少一个第一网络切片的信息。示例性地，如果上报内容是gNB级别，则第一接入网设备可以在NG接口消息(例如NG接口建立请求或者RAN Configuration update消息)中直接包含上述与第一标识对应的网络切片列表(至少一个第一网络切片的信息)。可选地，所述NG接口消息还包含第一标识。如果上报内容是小区级别的，则第一接入网设备在上述NG接口消息中包含小区标识以及与小区标识对应的网络切片列表(小区标识和slice list)，可选地，NG接口消息中还包含第一标识。NG接口分为NG-C接口(NG-RAN和5GC之间的控制面接口)和NG-U接口(NG-RAN和5GC之间的用户面接口)。NG接口消息就是通过NG-C接口传输的消息。
可选地，第一接入网设备也可以获知邻基站(比如，邻基站是第二接入网设备)对应的RSA ID和slice list。例如，假设第一接入网设备和第二接入网设备之间通过Xn接口连接，则第一接入网设备与第二接入网设备之间可以通过Xn接口消息(例如Xn接口建立请求或者Xn接口建立回复或NG-RAN NODE CONFIGURATION UPDATE)交互各自对应的RSA ID和slice list。比如，第一接入网设备向第二接入网设备发送Xn接口消息，Xn接口消息中包含上述第一标识和至少一个网络切片的信息。类似地，第一接入网设备可以通过Xn接口消息获取邻基站对应的RSA ID和slice list。可选地，第一接入网设备通过上述方法获取了邻基站对应的RSA ID和slice list后，第一接入网设备可以将邻基站对应的RSA ID和slice list发送给核心网网元。对于核心网网元而言，不论接入网设备对应的RSA ID和slice list是通过接入网设备上报的，还是通过OAM配置的，核心网网元可以接收TA范围内所有接入网设备的RSA ID和slice list。比如，核心网网元通过TA范围内所有接入网设备上报的方式，可以获知TA范围内所有接入网设备对应的RSA ID和slice list。可选地，核心网网元可以通过NAS消息将上述RSA ID和slice list的映射关系发送给终端设备，例如，通过Registration Accept,UE configuration Update command等NAS消息将上述RSA ID和slice list的映射关系发送给终端设备。
在本申请实施例中，第一接入网设备通过广播第一标识，然后通过RRC消息发送与第一标识对应的至少一个第一网络切片的信息，能够减少第一接入网设备的广播开销。例 如，考虑到第一标识和至少一个第一网络切片的映射关系在TA范围内不变，在特殊情况下，比如第一标识和一个第一网络切片一一对应，那么8bit就可以识别出TA范围内256个第一网络切片，从而大大减少了第一接入网设备的广播开销。
为了便于理解，这里以图3中的示意为例描述切片区域。如图3所示，假设一个TA范围包括3个切片区域(slicing area或slice area)(或称作RSA)，分别为：slice area1、slice area2和slice area3。不同的slice area支持的切片列表可能完全不同，也可能有部分重合。gNB1、gNB2和gNB3位于slice area1；gNB4和gNB5位于slice area2；gNB6、gNB7和gNB8位于slice area3。比如，slice area1支持slice#1和slice#2；slice area2支持slice#3和slice#4；slice area3支持slice#1，slice#5和slice#6。其中，一个TA区域支持的网络切片是由多个切片区域支持的网络切片列表的并集组成。对于切片区域，一个切片区域内的接入网设备或小区支持的网络切片相同。
作为一种可能的实现方式，不同的切片区域之间没有重叠的接入网设备或小区。以图4中的左图为例，slice area1内的gNB1、gNB2和gNB3支持slice#1和slice#2；slice area2的gNB4和gNB5支持slice#3和slice#4。
作为又一种可能的实现方式，不同的切片区域之间存在重叠的接入网设备或小区。以图4中的右图为例，slice area1内的gNB1、gNB2和gNB3支持slice#1；slice area2的gNB2、gNB4和gNB5支持slice#2。可以看到，gNB2同时支持slice#1和slice#2，因此同时落入slice area1和slice area2的范围。
本申请实施例对切片区域的具体场景不作限定，即图3、图4中的两种情况均适用。
在本申请实施例中，如果不将TA范围划分为多个区域，假设在TA范围内接入网设备支持的映射关系一直不变，那么终端设备获取到映射关系后，后续在TA范围内就不需要移动了。在本申请实施例中，如果将TA范围划分为多个区域(比如图3中的切片区域或图4中的切片区域)，位于不同区域的接入网设备支持的网络切片不同，假设在TA范围内映射关系不变，此时就要求一个区域的接入网设备把该TA范围内所有区域可能关闭的映射关系都告诉给终端设备，这样才能实现终端设备在TA范围内移动时已经获取到了映射关系。这里的映射关系是第一标识和至少一个第一网络切片的映射关系，比如，RSA ID和至少一个slice的信息的映射关系。
第一接入网设备可以主动向终端设备发送与第一标识对应的至少一个第一网络切片的信息，也可以是基于终端设备的请求向终端设备发送，对此不作限定。
可选地，在第一接入网设备向终端设备发送RRC消息之前，所述方法200还包括：
S230，终端设备向第一接入网设备发送请求消息，请求消息用于请求与第一标识对应的至少一个第一网络切片的信息。对应的，第一接入网设备接收来自终端设备的请求消息。
请求消息用于指示终端设备期望获取与第一标识对应的至少一个第一网络切片的信息，比如，RSA ID和slice list的映射关系。这里对请求消息的形式不作限定。比如，请求消息可以是RRC消息。又比如，请求消息可以是MAC层消息，如，新定义的MAC CE。又比如，请求消息可以是在上行RRC消息中新增的一个指示。可选地，终端设备的请求消息中可以包含至少一个第一标识，即用于请求至少一个第一标识中每个第一标识对应的网络切片的信息。例如，第一接入网设备广播第一标识#1，第一标识#2和第一标识#3，但是终端设备只希望获取第一标识#1和第一标识#2分别对应的至少一个网络切片的信 息，则终端设备将在请求消息中包含第一标识#1和第一标识#2，以便第一接入网设备在RRC消息中分别给出第一标识#1对应的至少一个网络切片的信息，以及第一标识#2和对应的至少一个网络切片的信息。
如果终端设备发生移动，可能会不认识第一标识，从而无法获知与第一标识对应的至少一个第一网络切片的信息。或者虽然认识第一标识，但是终端设备发生了跟踪区域更新，此时第一标识和至少一个网络切片的信息的映射关系可能发生了改变。终端设备通过向第一接入网设备发送请求消息，可以获取与第一标识对应的至少一个第一网络切片的信息。举例来说，以第一标识是RSA ID为例，当终端设备发现未保存所述RSA ID对应的至少一个第一网络切片的信息时(例如终端设备的AS层比较之前保存的RSA ID和从第一接入网设备的广播消息中获取的RSA ID)，终端设备可以触发给第一接入网设备发送上行RRC消息(例如RSA更新请求(update request))。第一接入网设备可以在下行RRC消息(例如RSA更新响应(update response))中将与RSA ID对应的slice list发送给终端设备，或者将RSA ID以及对应的slice list发送给终端设备。这里引入图5中的RSA update流程进行描述。以第一接入网设备是gNB，终端设备是UE，上行RRC消息是RSA update request，下行RRC消息是RSA update response为例进行描述，如图5所示，该RSA update流程300包括：
31，gNB广播RSA ID。UE获取gNB广播的RSA ID。
32，UE确定是否获取过与该RSA ID对应的网络切片信息(比如，slice list)。
换句话说，UE可以检测是否获取过该RSA ID的映射关系(比如，RSA ID与slice list间的映射关系)。比如，UE可以检测是否获取过与该RSA ID对应的slice list，又比如，UE可以检测是否获取过与该RSA ID对应的slice list，以及slice list中每个slice的slice index。
步骤32可能包括下文不同的情况。下面各个情况中的基站2对应步骤31中的gNB。
可能的情况1，假设RSA ID和网络切片标识有映射关系，在全网范围内唯一，则UE只需要检测是否获取过该RSA ID和网络切片的映射关系即可。例如UE读取基站1广播的RSA ID，同时获取了RSA ID和网络切片标识的映射关系，UE保存RSA ID和网络切片的映射关系。后续UE移动到基站2后，根据基站2广播的RSA ID，以及自身保存的RSA ID和网络切片的映射关系，判断是否获取过该RSA ID和网络切片的映射关系。
可能的情况2，假设PLMN ID，RSA ID以及网络切片标识有映射关系，且在全网范围内唯一，则UE需要检测是否获取过该PLMN ID下，该RSA ID和网络切片的映射关系。例如UE读取基站1广播的PLMN ID以及对应的RSA ID，同时获取PLMN ID，RSA ID和网络切片标识的映射关系，UE保存PLMN ID,RSA ID和网络切片的映射关系。后续UE移动到基站2后，根据基站2广播的PLMN ID和RSA ID，以及自身保存的PLMN ID，RSA ID和网络切片的映射关系，判断是否获取过该PLMN下，RSA ID和网络切片的映射关系。
可能的情况3，假设RSA ID和网络切片有映射关系，在TA范围内唯一，则UE需要检测是否获取过该TA下，该RSA ID和网络切片的映射关系。例如UE读取基站1广播的TAC以及RSA ID，同时获取了RSA ID和网络切片标识的映射关系，UE保存TAC，RSA ID以及网络切片的映射关系。后续UE移动到基站2后，根据基站2广播的TAC和 RSA ID，以及自身保存的TAC，RSA ID以及网络切片的映射关系，判断是否获取过该TAC下，该RSA ID和网络切片的映射关系。
可能的情况4，假设PLMN ID，RSA ID以及网络切片标识有映射关系，且在TA范围内唯一，则UE需要检测是否获取过该TA该PLMN ID下，该RSA ID和网络切片的映射关系。例如UE读取基站1广播的PLMN ID，TAC以及RSA ID，同时获取了PLMN ID，RSA ID和网络切片标识的映射关系，UE保存PLMN ID，TAC，RSA ID以及网络切片的映射关系。后续UE移动到基站2后，根据基站2广播的PLMN ID，TAC和RSA ID，以及自身保存的PLMN ID，TAC，RSA ID以及网络切片的映射关系，判断是否获取过该TA该PLMN下，该RSA ID和网络切片的映射关系。
如果UE未检测到该RSA ID对应的网络切片信息，则UE可以执行步骤33。
33，UE向gNB发送RSA update request。
UE通过向gNB发送RSA update request，以请求与该RSA ID对应的网络切片信息。
34，gNB向UE发送RSA update response。
gNB可以在RSA update response中包括与该RSA ID对应的网络切片信息。
可以理解，这里只是以图5中的RSA update流程为例描述，并不对本申请实施例的保护范围构成限定。
另外，这里对终端设备发送请求消息的触发条件也不作限定。比如，如上文所描述，终端设备在发现未保存所述RSA ID对应的至少一个第一网络切片的信息时，可以向第一接入网设备发送请求消息。具体比如，终端设备可以在发起跟踪区域更新(tracking area update，TAU)流程(例如NAS消息Tracking Area Update request)，或者附着(attach)流程，或者注册流程(例如NAS消息Registration Request)时，或者PDU会话建立请求(例如NAS消息PDU Session Establishment request)，需要读取接入网设备广播的RSA ID，若发现未保存所述RSA ID对应的slice list(或称作RSA ID和slice list的映射关系)，终端设备的NAS层通知AS层需要获取RSA ID标识和slice list的映射关系。或者，终端设备的NAS层通知AS层目标网络切片标识，如果终端设备的AS层判断发现无法找到所述目标网络切片标识对应的RSA ID，则AS层确定需要获取RSA ID和slice list的映射关系。或者，终端设备通过读取接入网设备广播的RSA ID，发现未保存所述RSA ID和slice list的映射关系，则确定需要获取RSA ID和slice list的映射关系。此时，终端设备在发送上述NAS消息的同时，可以在RRC消息(或者MAC CE或其他信令中)中包含上述请求消息。
上文是结合图5中的RSA update流程进行描述的，示例性地，对于RRC非激活(inactive)态，可以重用现有的RRCResumeRequest消息实现RSA update流程。例如如果终端设备发现RANAC发生了变化，则触发RRC层生成RRCResumeRequest消息，同时在RRC恢复请求(RRCResumeRequest)消息中包含的原因值(cause value)为RSA update。当第一接入网设备发现原因值为RSA update时，第一接入网设备后续在RRC消息中包含第一标识以及对应的至少一个网络切片标识。这里结合图6中的RRC inactive态对应的RSA update流程400进行描述。
以终端设备是UE，第一接入网设备是gNB1为例进行描述。如图6所示，RRC inactive态对应的RSA update流程，包括：
41，UE向gNB1发送RRCResumeRequest。
该RRCResumeRequest中包括原因值RSA update，表示需要对RSA ID对应的网络切片信息(比如，RSA ID和slice list的映射关系，具体描述可以参考上文步骤32中的描述)进行更新。
42，gNB1向UE发送RRC释放(RRCRelease)消息。
该RRCRelease中包括RSA ID和slice list的映射关系，比如，RSA ID以及该RSA ID支持的slice list。
可选地，gNB1在发现RRCResumeRequest中的原因值为RSA update时，可以触发步骤43-45，也可以不触发，具体取决于gNB1的实现，对此不作具体限定。
43，gNB1与gNB2通过交互恢复UE的上下文信息。其中，gNB2是在UE移动前服务于UE的基站，可以称作前服务基站last serving gNB。或者，gNB2是保存有UE上下文的锚点基站anchor gNB。
44，gNB1向接入管理功能(access management function，AMF)路径切换请求(path switch request)。
45，AMF向gNB1发送路径切换响应(path switch response)。
可以理解，这里只是以图6中的RRC inactive态对应的RSA update流程为例描述，并不对本申请实施例的保护范围构成限定。
在本申请实施例中，第一标识可以用于准入控制。比如，RSA ID、RANAC或CAG标识还可以用于准入控制。以RSA ID为例说明，假设终端设备事先被配置了允许接入的RSA ID(有可能是核心网网元通过NAS消息给终端设备配置allowed RSA list，也可能是第一接入网设备通过RRC消息配置给终端设备的，例如，通过RRC重配置消息或者RRCRelease消息)，则终端设备新到一个小区后，判断该小区广播的RSA ID是否属于允许接入的RSA list。如果该小区广播的RSA ID属于允许接入的RSA list，则终端设备可以接入该小区；如果该小区广播的RSA ID不属于允许接入的RSA list，则终端设备不能接入该小区。此外，第一接入网设备还可以配置RSA ID和接入类别(access category，AC)之间的映射关系，或者S-NSSAI和接入类别AC之间的映射关系，或者RSA ID,S-NSSAI和接入类别AC之间的映射关系。或者，这些映射关系可以是运营商自定义的，终端设备出厂就配置好。或者，这些映射关系是核心网网元(比如，AMF)通过NAS层消息告知给终端设备的。终端设备可以根据业务对应的S-NSSAI(例如NAS消息给出的应用(application，APP)ID和S-NSSAI之间的映射关系)，和/或当前小区所广播的RSA ID，找到对应的AC，从而可以根据接入网设备广播的AC对应的接入控制参数，判断是否可以接入当前小区。AC对应的接入控制参数也被称为统一接入控制(unified access control，UAC)。
可选地，终端设备也可以根据目标网络切片标识，以及，第一标识和至少一个网络切片的映射关系，判断当前接入网设备是否支持所述目标网络切片标识。如果当前接入网设备支持所述目标网络切片标识，则终端设备可以尝试接入所述当前接入网设备。如果当前接入网设备不支持所述目标网络切片标识，则终端设备可能选择接入其他接入网设备。可以理解，这里对当前接入网设备与第一接入网设备的关系不作限定，当前接入网设备可能是第一接入网设备，也可能不是第一接入网设备，对此不作具体限定。
在本申请实施例中，接入网设备之间可以交互各自广播的标识以及与标识对应的网络切片的信息。也就是说，第一接入网设备可以获得邻基站或邻小区广播的标识以及与标识对应的网络切片的信息，也可以将第一标识以及与第一标识对应的至少一个第一网络切片的信息发送给邻基站。
可选地，所述方法200还包括：S240，第二接入网设备向第一接入网设备发送第一消息，第一消息包括第二标识，以及与第二标识对应的至少一个第二网络切片的信息。对应的，第一接入网设备接收来自第二接入网设备的第一消息。第二标识用于标识第二接入网网络切片的信息。前文描述了第一接入网设备与第二接入网设备间可以通过Xn接口消息进行交互。示例性地，这里的第一消息可以是Xn接口消息，Xn接口消息中可以包括第二接入设备对应的RSA ID和slice list。
第二接入网设备与第一接入网设备可以互为邻基站。第二接入网设备与第一接入网设备之间可以交互各自广播的标识以及与标识对应的网络切片的信息。
可以理解，这里引入第二标识只是为了表征与第二接入网设备对应的切片区域，比如，第二接入网网络切片的信息，并无其他特殊含义。本申请实施例引入“第一标识”与“第二标识”是为了区分二者各自标识的接入网网络切片的信息。第二标识的描述可以参考前文第一标识的描述。
第一接入网设备在得到第二接入网设备的上述信息后，可以将上述信息告知给终端设备。这样，终端设备在移动到第二接入网设备的覆盖范围后，可以不需要再向第二接入网设备请求上述与第二标识对应的至少一个第二网络切片的信息。可选地，第一接入网设备发送给终端设备的RRC消息中还可以包括第二标识，以及与第二标识对应的至少一个第二网络切片的信息。这样，终端设备可以提前获取第二接入网设备的、与第二标识对应的至少一个第二网络切片的信息，从而可以减少终端设备触发申请与第二标识对应的至少一个第二网络切片的信息的流程，有助于节省终端设备的功耗。
可以理解，本申请实施例对第一接入网设备与第二接入网设备是否属于同一切片区域不作限定。第一接入网设备与第二接入网设备可能属于同一切片区域，即支持的网络切片相应，那么第一标识与第二标识相同，即第一标识所标识的第一接入网网络切片的信息与第二标识所标识的第二接入网网络切片的信息相同。或者，第一接入网设备与第二接入网设备支持的网络切片有部分相同或重叠，即“至少一个第一网络切片”中的部分网络切片与“至少一个第二网络切片”中的部分网络切片相同；第一接入网设备与第二接入网设备也可能不属于同一切片区域，但是终端设备可以提前从第一接入网设备获知第二标识以及与第二标识对应的至少一个第二网络切片的信息。
本申请还提供了一种通信方法。终端设备在接收到寻呼消息时，可以将寻呼消息中包括的网络切片信息与当前小区支持的网络切片进行对比。如果当前小区不支持，则终端设备可以触发小区重选。下文将详细描述。
图7是根据本申请实施例的另一通信方法500的示意性交互图。可以理解，图7中的终端设备可以是图1中的终端设备(比如，终端设备130或终端设备140)，也可以是指终端设备中的装置(例如处理器、芯片、或芯片系统等)。网络设备可以是可以是图1中的接入网设备120，也可以是指接入网设备中的装置(例如处理器、芯片、或芯片系统等)；或者，可以是图1中的核心网设备110，也可以是核心网设备中的装置(例如处理器、芯 片、芯片系统等)。还可理解，图7中终端设备网络设备之间交互的部分或全部信息，可以携带于已有的消息、信道、信号或信令中，也可以是新定义的消息、信道、信号或信令，对此不作具体限定。如图7所示，所述方法500包括：
S510，终端设备接收来自网络设备的寻呼消息，所述寻呼消息包括第一网络切片的信息。比如，第一网络切片的信息可以包括S-NSSAI和SST中的至少一个，也可以是其他被终端设备，接入网设备，核心网网元所公知的网络切片的标识。
网络设备可以是接入网设备或核心网网元，对此不作限定。举例来说，核心网网元向接入网设备发送寻呼消息。终端设备接收核心网网元通过接入网设备发送的寻呼消息，其中，所述接入网设备负责管理终端设备当前所在的小区。
终端设备在得到寻呼消息后，可以根据所述终端设备当前所在小区支持的网络切片的信息(或者所述接入网设备支持的网络切片的信息)，与寻呼消息中包括的第一网络切片的信息进行比较，确定所述终端设备当前所在小区是否支持所述第一网络切片。
S520，如果终端设备当前所在小区不支持所述第一网络切片，所述终端设备进行小区重选。
如果终端设备当前所在小区支持寻呼消息中的第一网络切片，则终端设备可以将ue-Identity和accessType发往高层即NAS层。如果终端设备当前所在小区不支持寻呼消息中的第一网络切片，则触发终端设备进行小区重选。
可选地，接入网设备在判断自己不支持寻呼消息中的第一网络切片时，可以在寻呼消息中包括支持该第一网络切片的小区列表、或者支持该第一网络切片的RSA ID或者其他支持该第一网络切片的小区标识或载波标识等，以便于终端设备可以有目的地进行小区重选。这样，终端设备在进行小区重选时，可以利用寻呼消息中提供的支持该第一网络切片的小区列表(或者支持该第一网络切片的RSA ID，或者支持该第一网络切片的载波标识等)进行小区重选，或者，利用寻呼消息中提供的支持该第一网络切片的RSA ID的小区中进行小区重选。
对于终端设备无法找到支持寻呼消息中的第一网络切片的小区或接入网设备的情况，如果终端设备收到过网络切片重映射的第一映射关系，则可以利用第一映射关系进行小区重选。网络切片重映射的含义在于，当终端设备希望发起第一网络切片关联的业务，终端设备或网络设备(网络设备可以包括接入网设备或核心网网元)可以通过和第一网络切片有重映射关系的第二网络切片的网络资源，支持所述第一网络切片关联的业务。例如，终端设备希望支持网络切片#1关联的业务，但是无法找到支持网络切片#1的接入网设备，假设网络切片#1和网络切片#2存在网络切片重映射关系，那么终端设备可以找到支持网络切片#2的小区或接入网设备，并发起网络切片#1关联的业务。其中，第一映射关系可以是终端设备从核心网网元或接入网设备获得的。比如，在终端设备在核心网注册时，核心网网元通过NAS消息(例如Registration Accept或UE Configuration update command等)向终端设备发送所述第一映射关系。比如，接入网设备在下发寻呼消息时，携带所述第一映射关系。
第一映射关系用于表征网络切片与网络切片之间的映射关系。当然，第一映射关系也可以是其他命名，对此不作限定。第一映射关系可以理解为网络切片重映射表(Slice remapping list)，比如，Slice remapping list可以包括如下信元：slice ID和重映射切片标 识(remapped slice ID)。
示例性地，网络切片重映射表可以如下所示：
Slice list
>slice ID
>remapped slice list(该list中包括至少一个remapped slice ID)
>>remapped slice ID
可选地，第一映射关系中还包含PLMN信息。示例性地，网络切片重映射表的一种可能的形式如下所示：
PLMN list
>PLMN ID
>Slice list
>>slice ID
>>remapped slice list
>>>remapped slice ID
可以理解，上述信元的举例只是示例性地描述，并不对本申请实施例构成限定。
作为一种可能的实现方式，可选地，所述终端设备进行小区重选，包括：所述终端设备根据第一映射关系进行小区重选，第一映射关系包括第一网络切片的信息，以及第二网络切片的信息，所述第一网络切片的信息和所述第二网络切片的信息存在重映射关系。也就是说，终端设备可以利用具有重映射关系的两个网络切片进行小区重选。如果终端设备所在小区不支持第一网络切片，那么终端设备可以利用与第一网络切片具有重映射关系的第二网络切片进行小区重选。
其中，第一网络切片的信息可以包括第一网络切片的ID或索引，SST/S-NSSAI等。类似的，第二网络切片的信息可以包括第二网络切片的ID或索引，SST/S-NSSAI等。举例来说，假设第一网络切片的信息为slice ID，那么第二网络切片的信息可以为remapped slice ID。
可选地，终端设备根据第一映射关系进行小区重选，包括：如果终端设备当前所在小区支持第二网络切片，所述终端设备在当前所在小区发起随机接入流程；如果终端设备当前所在小区不支持所述第二网络切片，所述终端设备选择支持所述第二网络切片的小区。
示例性的，如果终端设备当前所在小区支持第二网络切片，那么终端设备可以在当前所在小区发起随机接入流程，随机接入的发起流程可以参考现有标准化流程。如果终端设备当前所在小区不支持第二网络切片，那么终端设备可以选择支持第二网络切片的小区，比如，判断周围邻区是否支持第二网络切片，如果存在支持第二网络切片的小区，根据小区重选准则选择支持第二网络切片的小区。
作为一种可能的实现方式，如果终端设备找到了支持第二网络切片的小区，则可以将第二网络切片的信息告知给接入网设备或核心网网元。可选地，若所述终端设备选择支持所述第二网络切片的小区，所述方法500还包括：终端设备向网络设备(接入网设备或核心网网元)发送第二消息，第二消息包括所述第一网络切片的信息和所述第二网络切片的信息，或者，第二消息包括所述第二网络切片的信息。比如，第二消息包括remapped slice ID。又比如，第二消息包括slice ID和remapped slice ID。
示例性地，如果终端设备可以找到支持remapped slice ID，则接入选择的小区并告知当前接入网设备target slice ID(即寻呼消息中包含的slice ID)以及remapped slice ID。可选地，当前接入网设备在转发终端设备的NAS消息(例如PDU Session Establishment Request或者Service Request消息)时，在NG接口消息包含target slice ID和或remapped slice ID。
示例性地，终端设备通过NAS消息告知核心网网元remapped slice ID和target slice ID，以便核心网可以根据remapped slice ID找到对应的QoS参数。
作为一种可能的实现方式，若终端设备选择小区失败，可以向网络设备通知选择小区失败。小区失败，指的是终端设备无法找到支持目标网络切片(即寻呼消息中包含的网络切片标识所对应的网络切片)的小区，或者利用网络切片重映射表后，也无法找到支持remapped slice的小区，或者，可以找到支持目标网络切片的小区(或者利用网络切片重映射表找到支持remapped slice的小区)，但是该小区拒绝接入。可选地，所述方法500还包括：终端设备向网络设备(接入网设备或核心网网元)发送第三消息，第三消息用于通知所述终端设备选择小区失败。示例性地，如果终端设备选择小区失败的行为都失败了，则可以通过第三消息通知给接入网设备或核心网网元。比如，第三消息是NAS消息。这里，“终端设备选择小区失败”可以包括：利用第一映射关系选择小区失败。
可选地，所述方法500还包括：所述终端设备获取当前所在小区支持的网络切片的信息。这里，终端设备获取当前所在小区支持的网络切片的信息可以参考前文方法200中的描述。
可选地，上述“终端设备进行小区重选”的行为可以基于以下参数的一项或多项执行：接入小区的尝试次数，定时器(timer)等，对此不作限定。上述参数可能通过系统广播消息携带，也可能通过寻呼消息携带，也可能通过RRC消息携带，对此不作限定。举例来说，基于“接入小区的尝试次数”进行小区重选的一种可能实现方式可以是，当终端设备尝试接入支持目标网络切片的小区达到“接入小区的尝试次数”且不成功，则终端设备尝试搜索支持remapped slice的小区。举例来说，基于“定时器”进行小区重选的一种可能实现方式可以是，当接入小区在定时器到时之前，首先尝试搜索支持目标网络切片的小区；当定时器到时，且无法找到支持目标网络切片的小区时，终端设备尝试搜索支持remapped slice的小区。
本申请还提供了一种通信方法。引入终端设备侧网络切片的优先级信息，终端设备可以结合优先级信息进行小区选择或小区重选，有助于选择更合适的小区。或者，引入接入网设备侧网络切片在不同频点的优先级，或者接入网设备侧在不同频点支持不同网络切片的优先级，终端设备可以结合上述优先级信息进行小区选择或小区重选。下文将详细描述。
图8是根据本申请实施例的又一通信方法600的示意性流程图。可以理解，图8中的终端设备可以是图1中的终端设备(比如，终端设备130或终端设备140)，也可以是指终端设备中的装置(例如处理器、芯片、或芯片系统等)。核心网网元设备可以是图1中的核心网设备110，也可以是指核心网设备中的装置(例如处理器、芯片、或芯片系统等)。接入网设备可以是图1中的接入网设备120或接入网设备中的装置(例如处理器、芯片、或芯片系统等)。还可理解，图8中核心网设备与接入网设备(或终端设备)之间交互的部分或全部信息，或者，接入网设备与终端设备接入网设备之间交互的部分或全部信息， 可以携带于已有的消息、信道、信号或信令中，也可以是新定义的消息、信道、信号或信令，对此不作具体限定。如图8所示，所述方法600包括：
S610，核心网网元确定至少一个网络切片中每个网络切片的优先级。
核心网网元可以为每个网络切片确定相应的优先级。
S620，核心网网元发送第四消息，第四消息包括每个网络切片的标识以及每个网络切片对应的优先级。
这里，核心网网元可以向终端设备发送第四消息，也可以通过接入网设备向终端设备发送第四消息，对此不作限定。例如，所述第四消息是核心网网元发送给终端设备的非接入层NAS消息。
举例来说，核心网网元在通过NAS消息向终端设备发送allowed S-NSSAI时，可以同时给出切片的优先级，具体信元如下所示：
Allowed S-NSSAIs
>S-NSSAI(或其他slice标识)
>优先级priority
在本申请实施例中，终端设备获取至少一个网络切片中每个网络切片的优先级信息；然后根据所述每个网络切片的优先级信息进行小区选择或者小区重选。
对于终端设备而言，终端设备获取网络切片的优先级信息可以有不同的方式。作为一种可能的实现方式，终端设备根据核心网网元给出的UE路由选择策略(UE route selection policy，URSP)中可能包含的网络切片选择策略(network slice selection policy，NSSP)，关联APP ID和S-NSSAI；然后，终端设备可以根据历史应用APP使用情况对网络切片的优先级进行排序，比如，将使用时间最长的APP ID对应的S-NSSAI作为最高优先级，以此类推，最终确定S-NSSAI的优先级。作为又一种可能的实现方式，终端设备可以从核心网网元直接获取至少一个网络切片中每个网络切片的优先级信息。
终端设备在得到网络切片的优先级信息后，可以使用网络切片的优先级信息进行小区选择或小区重选。
作为一种可能的实现方式，若所述终端设备当前处于第一小区，其中，所述终端设备根据所述每个网络切片的优先级信息进行小区选择或者小区重选，包括：
终端设备在所述至少一个网络切片中选择第一网络切片，第一网络切片的优先级是所述至少一个网络切片中最高的；确定所述第一小区是否支持所述第一网络切片；在所述第一小区不支持所述第一网络切片的情况下，执行小区搜索，得到第二小区，并判断所述第二小区是否支持所述第一网络切片，可选地还可以根据判断是否满足小区重选条件(例如S准则或R准则)；在所述第二小区支持所述第一网络切片的情况下，或者在所述第二小区支持所述第一网络切片，同时满足小区重选条件的情况下，将所述第二小区放入候选小区集合，继续搜索执行前述动作直到无法找到新小区为止；在所述候选小区集合不为空的情况下，终端设备选择驻留在候选小区集合中信号最好(例如接收功率最高或者信号强度最高)的小区；在所述候选小区集合为空的情况下，终端设备选择第二网络切片，所述第二网络切片的优先级小于所述第一网络切片的优先级，继续执行小区搜索直到选择到合适的小区为止；在所述第一小区支持所述第一网络切片的情况下，终端设备继续驻留在所述第一小区。
上述第一小区是终端设备当前驻留的小区，终端设备优先考虑第一小区。具体而言，终端设备根据优先级信息，选择优先级最高的网络切片。首先，终端设备判断当前驻留的小区是否支持优先级最高的网络切片(例如，当前驻留的小区支持的网络切片可能是接入网设备直接广播支持哪些S-NSSAI，也可能是通过间接的RSA ID的方式告知)，如果当前驻留的小区支持优先级最高的网络切片则保持不变，即仍然驻留在当前小区；如果当前驻留的小区不支持优先级最高的网络切片，终端设备进行小区搜索，搜索到第二小区(比如满足小区选择或者小区重选条件，例如S准则或R准则)后，判断第二小区(第二小区可以理解为终端设备搜索到的满足S准则或R准则的小区)是否支持优先级最高的网络切片。如果终端设备搜索到的新小区支持优先级最高的网络切片，则放入候选小区集合中。继续搜索执行前述动作直到无法找到新小区为止。如果候选小区集合不为空，则终端设备根据小区重选的原则选择一个小区，例如根据小区重选R准则对候选小区集合内的小区进行排序，然后，终端设备选择候选小区集合中排序最高的小区。如果候选小区集合为空，则终端设备选择第二优先级的网络切片，之后的判断行为如前面所述，直到选择到小区为止。
作为又一种可能的实现方式，所述终端设备根据所述每个网络切片的优先级信息进行小区选择或者小区重选，包括：
所述终端设备在所述至少一个网络切片中选择第一网络切片，所述第一网络切片的优先级是所述至少一个网络切片中最高的；所述终端设备进行小区搜索，得到第三小区；确定所述第三小区是否支持所述第一网络切片；在所述第三小区支持所述第一网络切片的情况下，如果第三小区满足小区选择条件或小区重选条件，例如S准则或者R准则，所述终端设备将所述第三小区放入候选小区集合，继续搜索执行前述动作直到无法找到新小区为止。在所述候选小区集合不为空的情况下，终端设备选择驻留在候选小区集合中信号最好(例如接收功率最高或者信号强度最高)的小区；在所述候选小区集合为空的情况下，所述终端设备选择第二网络切片，所述第二网络切片的优先级小于所述第一网络切片的优先级，继续执行小区搜索直到选择到合适的小区为止。
具体而言，终端设备将当前驻留小区和其他所有小区一视同仁。终端设备根据优先级信息，选择优先级最高的slice。终端设备进行小区搜索，搜索到第三小区(比如满足小区选择条件或小区重选条件，例如S准则或R准则)，并判断第三小区(第三小区可以理解为终端设备进行小区搜索后搜索到的小区)是否支持优先级最高的网络切片，如果支持则放入候选小区集合中，继续搜索执行前述动作直到无法找到新小区为止。如果候选小区集合不为空，则终端设备根据小区重选原则在候选小区集合中选择一个小区。如果候选小区集合为空，则终端设备选择第二优先级的网络切片(比如第二网络切片)，后续之后的动作同前面所述，直到选择到合适的小区为止。
上文描述了终端设备基于网络切片的优先级进行小区选择或重选的实现方式，下面将描述终端设备基于不同频点上不同网络切片的优先级，或者不同网络切片在不同频点上的优先级进行小区选择或重选的实现方式。
作为一种可能的实现方式，接入网设备针对第一频点确定至少一个网络切片中每个网络切片的优先级；所述接入网设备向终端设备发送第五消息，所述第五消息包括所述第一频点，所述每个网络切片的标识，以及所述每个网络切片对应的优先级。对应的，终端设 备接收第五消息；并根据第五消息进行小区选择或重选。可以理解，第五消息可以通过广播方式发送，也可以通过RRC消息方式发送，对此不作限定。
可选地，第五消息中也可以不包括每个网络切片对应的优先级，每个网络切片的优先级可以通过每个网络切片的标识的排序间接体现出来，比如，越靠前的网络切片，其网络切片优先级越高。
可以理解，这里只是以第一频点为例进行描述，但并不对本申请实施例构成限定。事实上，接入网设备可以为多个频点中的每个频点确定每个网络切片的优先级信息。这种实现方式也可以理解为per frequency per slice的方式。
例如，第五消息中包括的信元如下所示：
载波频率列表Carrier frequency list
>载波频率carrier frequency(例如绝对无线频率信道编号(absolute radio-frequency channel number，ARFCN)value)
>网络切片小区重选优先级列表sliceCellReselectionPriorityList
>slice ID
>priority
其中，slice ID可以是S-NSSAI,也可能是slice index，还可以是其他slice标识，例如前文提到的RSA ID，对此不作限定。当slice ID是RSA ID时，第五消息给出的是每个频点上每个RSA ID对应的优先级。
举例来说，切片区域1的接入网设备可能在广播消息中广播如下信息:
4.9GHz,超可靠低延时通信(ultra-reliability low-latency communication，URLLC),High；增强型移动宽带(enhanced mobile broadband，eMBB)，Low；2.6GHz eMBB。
切片区域1的接入网设备广播的上述信息可以理解为：终端设备在该切片区域1如果希望支持URLLC业务，则优先在4.9GHz上进行小区搜索；如果希望支持eMBB业务，则优先在2.6GHz上进行小区搜索。
举例来说，切片区域2的接入网设备可能在广播消息中广播如下信息：
4.9GHz eMBB。
切片区域2的接入网设备广播的上述信息可以理解为：在该切片区域2只支持eMBB业务，即支持eMBB业务的UE只能在4.9GHz上进行小区搜索。
上文是以第五消息中包括第一频点的网络切片优先级信息为例进行描述，事实上，第五消息可以包括多个频点中每个频点的网络切片优先级信息。可选地，第五消息中可以包括多个频点，以及每个频点对应的网络切片的标识，以及每个网络切片对应的优先级。对于终端设备而言，终端设备接收到第五消息后，可以得知针对不同频点，不同网络切片的优先级。即相当于可以获知第一网络切片在不同频点的优先级。终端设备在第一频点上搜索到的小区，第一频点是所述第一网络切片优先级最高的频点。例如上述举例，接入网设备广播消息显示针对URLLC业务，4.9GHz是高优先级，2.6GHz为低优先级或不支持URLLC业务，那么4.9GHz为第一频点。终端设备在第一频点上搜索到小区后，根据小区选择条件或者小区重选条件，选择合适的小区进行驻留，例如选择信号强度最高的小区。
需要说明的是，上述实现方式描述了接入网设备能够针对第一频点确定至少一个网络切片中每个网络切片的优先级，并向终端设备发送第五消息，所述第五消息包括所述第一 频点，所述每个网络切片的标识，以及所述每个网络切片对应的优先级的方案。可以理解，该实现方式中也可以适用于RSA ID。举例来说，接入网设备能够针对第一频点确定至少一个RSA ID中每个RSA ID的优先级，并向终端设备发送第五消息，所述第五消息包括所述第一频点，所述每个RSA ID，以及所述每个RSA ID对应的优先级。对应的，终端设备可以根据第一网络切片确定对应的RSA ID，并根据RSA ID选择优先级最高的第一频点。然后，终端设备在第一频点上搜索小区，最终根据小区选择条件或者小区重选条件选择合适的小区进行驻留。其中，第一网络切片可以是终端设备采用前文选择网络切片的方式得到的，也可以是根据业务需求选择的，对此不作限定。比如，终端设备的NAS层通知需要发起第一网络切片的业务，即NAS层将第一网络切片的标识告知AS层。
作为另一种可能的实现方式，接入网设备针对第一网络切片确定至少一个频点中每个频点的优先级；向终端设备发送第六消息，第六消息中包括第一网络切片的标识，每个频点的标识，以及每个频点对应的优先级。对应的，终端设备接收第六消息。可以理解，第六消息可以通过广播方式发送，也可以通过RRC消息方式发送，对此不作限定。
可选地，第六消息中也可以不包括每个频点对应的优先级，每个频点的优先级可以通过每个频点的标识的排序间接体现出来，比如，越靠前的频点，其频点优先级越高。
可以理解，这里只是以第一网络切片为例进行描述，但并不对本申请实施例构成限定。事实上，接入网设备可以为多个网络切片中的每个网络切片确定每个频点的优先级信息。这种实现方式也可以理解为per slice per frequency的方式。
例如，第六消息中包括的信元如下所示：
Slice list
>slice ID
>carrier frequency list
>>carrier frequency(例如ARFCN value)
>>priority
也就是说，接入网设备可以为第一网络切片确定不同频点的优先级，并将各个频点的优先级，频点的标识，第一网络切片的标识等信息发送给终端设备。可以理解，这里只是以第一网络切片为例进行说明，事实上，接入网设备可以针对多个网络切片中的每个网络切片确定每个频点的优先级。
其中，slice ID可以是S-NSSAI,也可能是slice index，还可以是其他slice标识，例如前文提到的RSA ID，对此不作限定。当slice ID是RSA ID时，第六消息给出的是每个RSA ID上每个频点对应的优先级。需要说明的是，上述实现方式描述了接入网设备能够针对第一网络切片确定至少一个频点中每个频点的优先级，并向终端设备发送第六消息，第六消息中包括第一网络切片的标识，每个频点的标识，以及每个频点对应的优先级的方案。可以理解，该实现方式中也可以适用于RSA ID。举例来说，接入网设备能够针对RSA ID确定至少一个频点中每个频点的优先级；向终端设备发送第六消息，第六消息中包括RSA ID，每个频点，以及每个频点对应的优先级。
对于终端设备而言，终端设备获取针对第一网络切片的至少一个频点中每个频点的优先级；在所述第一频点上进行小区搜索，所述第一频点是所述至少一个频点中优先级最高的频点。
其中，第一网络切片可以是终端设备采用前文选择网络切片的方式得到的，也可以是根据业务需求选择的，对此不作限定。比如，终端设备的NAS层通知需要发起第一网络切片的业务，即NAS层将第一网络切片的标识告知AS层。
终端设备可以监听小区广播消息，获知网络切片的信息，频点的信息，优先级信息等。
这里，终端设备可以根据第一网络切片在所述每个频点的优先级，在所述至少一个频点中选择第一频点，所述第一频点是所述第一网络切片在所述至少一个频点中优先级最高的频点。例如，2.6Ghz和4.9GHz都支持第一网络切片，其中，第一网络切片在4.9GHz的优先级高于，第一网络切片在2.6GHz的优先级，那么选择的第一频点为4.9GHz。然后，终端设备在第一频点上执行小区搜索。终端设备在第一频点进行小区搜索有以下两种实现方式：
1)网络切片是carrier粒度部署，即在该carrier上搜索到的小区肯定支持该网络切片。终端设备在指定carrier上搜索小区后，将满足小区选择S准则的小区放入候选小区集合中。终端设备后续可以根据小区重选R准则对候选小区集合中的小区进行排序，然后选择排序最高的小区。如果候选小区集合为空，则终端设备选择第一网络切片在carrier优先级第二高的carrier(可以理解为仅低于最高优先级carrier的carrier)进行小区搜索，例如在2.6GHz上进行小区搜索，并重复前面提到的流程，直到选择到小区为止。
2)网络切片是区域粒度部署的，即在该carrier上搜索到的小区可能不支持所述网络切片。终端设备在指定carrier上搜索小区后，将支持该网络切片且同时满足小区选择S准则的小区放入候选小区集合中。终端设备后续可以根据小区重选R准则对候选小区集合中的小区进行排序，选择排序最高的小区。如果所述候选小区集合为空，则终端设备选择所述第一网络切片在carrier优先级第二高的carrier(可以理解为仅低于最高优先级carrier的carrier)进行小区搜索，并重复前面提到的流程，直到选择到小区为止。
在上述两种实现方式中，是以carrier为例进行描述。事实上，carrier可以替换为频点。
对于接入网设备广播的slice ID为RSA ID的情况，即接入网设备能够针对RSA ID确定至少一个频点中每个频点的优先级，终端设备可以作相应处理。具体而言，终端设备在获取了第六消息后，根据第一网络切片的标识找到对应的RSA ID，接着获取所述RSA ID在不同频点上的优先级。例如，终端设备找到RSA ID对应的优先级最高的第一频点，接着在第一频点进行小区搜索，后续操作同上。其中，第一网络切片可以是终端设备采用前文选择网络切片的方式得到的，也可以是根据业务需求选择的，对此不作限定。比如，终端设备的NAS层通知需要发起第一网络切片的业务，即NAS层将第一网络切片的标识告知AS层。这里假设终端设备之前接入其他接入网设备时，已经获取过RSA ID和至少一个网络切片的映射关系，例如，终端设备之前接入过第一接入网设备，且第一接入网设备将一组或多组RSA ID和至少一个网络切片的映射关系发送给了终端设备。举例来说，第一接入网设备提供的一组或多组RSA ID和至少一个网络切片的映射关系，示例为：RSA ID#1对应S-NSSAI#1和S-NSSAI#2，RSA ID#2对应S-NSSAI#3，S-NSSAI#4以及S-NSSAI#5。当终端设备接收当前接入网设备广播的每个频点支持的每个网络切片的优先级，或者，每个网络切片在每个频点上的优先级。例如，当前接入网设备广播RSA ID#1在4.9GHz上为高优先级，RSA ID#1在2.6GHz上为低优先级。如果终端设备希望接入S-NSSAI#2(假设S-NSSAI#2为第一网络切片的标识)，那么终端设备根据前述从第一接 入网设备获得的映射关系(RSA ID#1对应S-NSSAI#1和S-NSSAI#2)，可以找到S-NSSAI#2与RSA ID#1对应，并基于当前接入网设备广播的RSA ID#1的频点优先级，可以找到RSA ID#1的高优先级频点为4.9GHz，终端设备首先在4.9GHz进行小区搜索。只有当4.9GHz上搜索不到合适的小区，终端设备才会在2.6GHz进行小区搜索。
可以理解的是，本申请实施例中的一些可选的特征，在某些场景下，可以不依赖于其他特征，比如其当前所基于的方案，而独立实施，解决相应的技术问题，达到相应的效果，也可以在某些场景下，依据需求与其他特征进行结合。相应的，本申请实施例中给出的装置也可以相应的实现这些特征或功能，在此不予赘述。
相应于上述方法实施例给出的方法，本申请实施例还提供了相应的装置，所述装置包括用于执行上述实施例相应的模块。所述模块可以是软件，也可以是硬件，或者是软件和硬件结合。可以理解的是，方法实施例所描述的技术特征同样适用于以下装置实施例。
图9是本申请实施例的一个装置的示意性框图。如图9所示，本申请又一实施例提供了一种装置1700。该装置可以是终端设备,也可以是终端设备的部件(例如，集成电路，芯片等等)。该装置还可以是网络设备(网络设备可以是接入网设备或核心网网元)，也可以是网络设备的部件(例如，集成电路，芯片等等)。该装置也可以是其他通信模块，用于实现本申请方法实施例中的方法。该装置1700可以包括：处理模块1702(处理单元)。可选地，该装置1700还可以包括发送模块1701(发送单元)、接收模块1704(接收单元)和存储模块1703(存储单元)。其中，发送模块1701和接收模块1704可以组成收发单元，同时具有接收和发送的功能。其中，处理模块1702可以是处理器。发送模块1701可以是发射器。接收模块1704可以是接收器。接收器和发射器可以集成在一起组成收发器。
在一种可能的设计中，如图9中的一个或者多个模块可能由一个或者多个处理器来实现，或者由一个或者多个处理器和存储器来实现；或者由一个或多个处理器和收发器实现；或者由一个或者多个处理器、存储器和收发器实现，本申请实施例对此不作限定。所述处理器、存储器、收发器可以单独设置，也可以集成。
所述装置具备实现本申请实施例描述的终端设备的功能，比如，所述装置包括终端设备执行本申请实施例描述的终端设备涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一步参考前述对应方法实施例中的相应描述。
或者所述装置具备实现本申请实施例描述的网络设备的功能，比如，所述装置包括所述网络设备执行本申请实施例描述的网络设备涉及步骤所对应的模块或单元或手段(means)，所述功能或单元或手段(means)可以通过软件实现，或者通过硬件实现，也可以通过硬件执行相应的软件实现，还可以通过软件和硬件结合的方式实现。详细可进一步参考前述对应方法实施例中的相应描述。
可选地，本申请实施例中的装置1700中各个模块可以用于执行本申请实施例中图2描述的方法。
在一种可能的实施方式中，一种装置1700可包括：发送模块1701和处理模块1702。
作为一种可能的实现方式，所述处理模块1702，用于广播第一标识，所述第一标识用于标识第一接入网网络切片的信息。
所述发送模块1701，用于向终端设备发送无线资源控制RRC消息，所述RRC消息包括所述与所述第一标识对应的至少一个第一网络切片的信息。
可选地，所述装置1700还包括，接收模块1704。所述接收模块1704用于在向所述终端设备发送RRC消息之前，接收来自所述终端设备的请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
可选地，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
可选地，所述接收模块1704还用于接收来自所述第二接入网设备的第一消息，所述第一消息包括所述第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息。
或者，作为一种可能的实现方式，所述装置1700包括处理模块1702和发送模块1701。所述处理模块1702，用于针对第一频点确定至少一个网络切片中每个网络切片的优先级。
所述发送模块1701，用于发送第五消息，所述第五消息包括所述第一频点，所述每个网络切片的标识，以及所述每个网络切片对应的优先级。
或者，作为一种可能的实现方式，所述装置1700包括处理模块1702和发送模块1701。所述处理模块1702，用于针对第一网络切片确定至少一个频点中每个频点的优先级。
所述发送模块1701，用于发送第六消息，所述第六消息中包括所述第一网络切片的标识，所述每个频点的标识，以及所述每个频点对应的优先级。
可以理解的是，所述装置1700可对应于前述方法实施例中接入网设备的方法，比如，图2中的方法，并且装置1700中的各个模块的上述和其它管理操作和/或功能分别为了实现前述方法实施例中接入网设备的方法的相应步骤，因此也可以实现前述方法实施例中的有益效果，为了简洁，这里不作赘述。
在另一种可能的实施方式中，一种装置1700可包括：接收模块1704和处理模块1702。
作为一种可能的实现方式，所述处理模块1702，用于获取第一标识，所述第一标识用于标识第一接入网网络切片的信息。
所述接收模块1704，用于接收来自第一接入网设备的RRC消息，所述RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。
可选地，所述装置1700还包括发送模块1701。所述发送模块1701用于向所述第一接入网设备发送请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
可选地，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
或者，作为一种可能的实现方式，所述装置1700包括处理模块1702和接收模块1704。所述接收模块1704，用于接收来自网络设备的寻呼消息，所述寻呼消息包括第一网络切片的信息。
所述处理模块1702，用于如果所述装置1700当前所在小区不支持所述第一网络切片，进行小区重选。
可选地，所述处理模块1702用于进行小区重选，包括：根据第一映射关系进行小区重选，所述第一映射关系包括所述第一网络切片的信息，以及第二网络切片的信息，所述第一网络切片的信息和所述第二网络切片的信息存在重映射关系。
可选地，所述处理模块1702用于根据第一映射关系进行小区重选，包括：如果所述装置1700当前所在小区支持所述第二网络切片，在当前所在小区发起随机接入流程；如果所述装置1700当前所在小区不支持所述第二网络切片，选择支持所述第二网络切片的小区。
可选地，所述装置1700还包括发送模块1701。所述发送模块1701用于向所述网络设备发送第二消息，所述第二消息包括所述第一网络切片的信息和所述第二网络切片的信息，或者，所述第二消息包括所述第二网络切片的信息。
可选地，所述发送模块1701，还用于向所述网络设备发送第三消息，所述第三消息用于通知所述终端设备选择小区失败。
或者，作为一种可能的实现方式，所述装置1700包括处理模块1702。所述处理模块1702，用于获取至少一个网络切片中每个网络切片的优先级信息。
所述处理模块1702，还用于根据所述每个网络切片的优先级信息进行小区选择或者小区重选。
或者，作为一种可能的实现方式，所述装置1700包括处理模块1702。所述处理模块1702，用于获取针对第一网络切片的至少一个频点中每个频点的优先级。
所述处理模块1702，还用于在所述第一频点上进行小区搜索，所述第一频点是所述至少一个频点中优先级最高的频点。
可选地，所述处理模块1702还用于若在所述第一频点上未搜索到小区，在第二频点上进行小区搜索，所述第二频点的优先级低于所述第一频点。
可选地，所述装置1700还包括接收模块1704。所述收发模块1701用于获取针对第一网络切片的至少一个频点中每个频点的优先级，包括：调用所述接收模块1704接收来自网络设备的第六消息，所述第六消息中包括所述第一网络切片的标识，所述每个频点的标识，以及所述每个频点对应的优先级。
可以理解的是，所述装置1700可对应于前述方法实施例中终端设备的方法，比如，图2或图7中的方法，并且装置1700中的各个模块的上述和其它管理操作和/或功能分别为了实现前述方法实施例中终端设备的方法的相应步骤，因此也可以实现前述方法实施例中的有益效果，为了简洁，这里不作赘述。
在一种可能的实施方式中，一种装置1700可包括：发送模块1701和处理模块1702。
所述处理模块1702，用于确定至少一个网络切片中每个网络切片的优先级。
所述发送模块1701，用于发送第四消息，所述第四消息包括所述每个网络切片的标识以及所述每个网络切片对应的优先级。
可选地，所述处理模块1702还用于若在所述第一频点上未搜索到小区，在第二频点所述第四消息是所述核心网网元发送给终端设备的非接入层消息
可以理解的是，所述装置1700可对应于前述方法实施例中核心网网元的方法，比如，图8中的方法，并且装置1700中的各个模块的上述和其它管理操作和/或功能分别为了实现前述方法实施例中核心网网元的方法的相应步骤，因此也可以实现前述方法实施例中的有益效果，为了简洁，这里不作赘述。
图10给出了一种装置的结构示意图。所述装置1500可以是网络设备(网络设备可以是接入网设备或核心网网元)，也可以是终端设备，也可以是支持网络设备实现上述方法 的芯片、芯片系统、或处理器等，还可以是支持终端设备实现上述方法的芯片、芯片系统、或处理器等。该装置可用于实现上述方法实施例中描述的方法，具体可以参见上述方法实施例中的说明。
所述装置1500可以包括一个或多个处理器1501，所述处理器1501也可以称为处理单元，可以实现一定的控制功能。所述处理器1501可以是通用处理器或者专用处理器等。例如可以是基带处理器或中央处理器。基带处理器可以用于对通信协议以及通信数据进行处理，中央处理器可以用于对通信装置(如，核心网网元、基站、基带芯片，终端、终端芯片，DU或CU等)进行控制，执行软件程序，处理软件程序的数据。
在一种可选的设计中，处理器1501也可以存有指令和/或数据1503，所述指令和/或数据1503可以被所述处理器运行，使得所述装置1500执行上述方法实施例中描述的方法。
在另一种可选的设计中，处理器1501中可以包括用于实现接收和发送功能的收发单元。例如该收发单元可以是收发电路，或者是接口，或者是接口电路。用于实现接收和发送功能的收发电路、接口或接口电路可以是分开的，也可以集成在一起。上述收发电路、接口或接口电路可以用于代码/数据的读写，或者，上述收发电路、接口或接口电路可以用于信号的传输或传递。
在又一种可能的设计中，装置1500可以包括电路，所述电路可以实现前述方法实施例中发送或接收或者通信的功能。
可选的，所述装置1500中可以包括一个或多个存储器1502，其上可以存有指令1504，所述指令可在所述处理器上被运行，使得所述装置1500执行上述方法实施例中描述的方法。可选的，所述存储器中还可以存储有数据。可选的，处理器中也可以存储指令和/或数据。所述处理器和存储器可以单独设置，也可以集成在一起。例如，上述方法实施例中所描述的对应关系可以存储在存储器中，或者存储在处理器中。
可选的，所述装置1500还可以包括收发器1505和/或天线1506。所述处理器1501可以称为处理单元，对所述装置1500进行控制。所述收发器1505可以称为收发单元、收发机、收发电路或者收发器等，用于实现收发功能。
在一种可能的设计中，一种装置1500(例如，集成电路、无线设备、电路模块，或终端设备等)可用于实现本申请实施例中接入网设备执行的方法，或者，用于实现终端设备执行的方法，或者用于实现核心网网元执行的方法。
本申请中描述的处理器和收发器可实现在集成电路(integrated circuit，IC)、模拟IC、射频集成电路RFIC、混合信号IC、专用集成电路(application specific integrated circuit，ASIC)、印刷电路板(printed circuit board，PCB)、电子设备等上。该处理器和收发器也可以用各种IC工艺技术来制造，例如互补金属氧化物半导体(complementary metal oxide semiconductor,CMOS)、N型金属氧化物半导体(nMetal-oxide-semiconductor，NMOS)、P型金属氧化物半导体(positive channel metal oxide semiconductor,PMOS)、双极结型晶体管(bipolar junction transistor，BJT)、双极CMOS(BiCMOS)、硅锗(SiGe)、砷化镓(GaAs)等。
以上实施例描述中的装置可以是核心网网元、接入设备或者终端设备，但本申请中描述的装置的范围并不限于此，而且装置的结构可以不受图10的限制。装置可以是独立的设备或者可以是较大设备的一部分。例如所述装置可以是：
(1)独立的集成电路IC，或芯片，或，芯片系统或子系统；
(2)具有一个或多个IC的集合，可选的，该IC集合也可以包括用于存储数据和/或指令的存储部件；
(3)ASIC，例如调制解调器(MSM)；
(4)可嵌入在其他设备内的模块；
(5)接收机、终端、智能终端、蜂窝电话、无线设备、手持机、移动单元、车载设备、网络设备、云设备、人工智能设备等等；
(6)其他等等。
图11是本申请实施例提供的接入网设备的结构示意图，例如可以为基站3000的结构示意图。该基站3000可应用于如图1所示的系统中，执行上述方法实施例中接入网设备的功能。
在5G通信系统中，接入网设备1100可以包括CU、DU和有源天线单元(Active Antenna Unit,AAU)。CU和DU之间可以通过接口进行通信，其中，控制面(control plane，CP)接口可以为Fs-C，比如F1-C，用户面(user plane，UP)接口可以为Fs-U，比如F1-U。
CU、DU、AAU可以采取分离或合设的方式，所以，会出现多种网络部署形态，一种可能的部署形态如图11所示，CU与DU共硬件部署。应理解，图11只是一种示例，对本申请的保护范围并不限制，例如，部署形态还可以是DU部署在5G BBU机房，CU集中部署或DU集中部署，CU更高层次集中等。
所述AAU可以包括收发单元1101，与图10中的接收单元1020和发送单元1010对应。可选地，该收发单元1101还可以称为收发机、收发电路、或者收发器等，其可以包括至少一个天线1111和射频单元1112。可选地，收发单元1101可以包括接收单元和发送单元，接收单元可以对应于接收器(或称接收机、接收电路)，发送单元可以对应于发射器(或称发射机、发射电路)。所述AAU主要用于射频信号的收发以及射频信号与基带信号的转换，例如，用于向终端设备发送上述实施例中消息或信息。所述CU和DU可以实现内部处理功能称为处理单元1102用于进行基带处理，对基站进行控制等。所述AAU与CU和DU可以是物理上设置在一起，也可以物理上分离设置的，即分布式基站。
所述CU和DU为接入网设备的控制中心，也可以称为处理模块(或处理单元)，可以与处理模块1702对应，主要用于完成基带处理功能，如信道编码，复用，调制，扩频等。例如该CU和DU(处理模块1702)1102可以用于控制接入网设备1100执行上述方法实施例中关于接入网设备(比如，第一接入网设备)的操作流程。
在一个示例中，所述CU和DU可以由一个或多个单板构成，多个单板可以共同支持单一接入制式的无线接入网(如，LTE系统，或5G系统)，也可以分别支持不同接入制式的无线接入网。所述CU和DU还包括存储器1121和处理器1122。所述存储器1121用以存储必要的指令和数据。所述处理器1122用于控制基站进行必要的动作，例如用于控制基站执行上述方法实施例中关于接入网设备的操作流程。所述存储器1121和处理器1122可以服务于一个或多个单板。也就是说，可以每个单板上单独设置存储器和处理器。也可以是多个单板共用相同的存储器和处理器。此外每个单板上还可以设置有必要的电路。
上述CU和DU1102可以用于执行前面方法实施例中描述的由接入网设备内部实现的 动作，而AAU可以用于执行前面方法实施例中描述的接入网设备向终端设备发送或从终端设备接收的动作。具体请见前面方法实施例中的描述，此处不再赘述。
另外，接入网设备不限于图11所示的形态，也可以是其它形态：例如：包括BBU和自适应无线单元(adaptive radio unit，ARU)，或者包括BBU和有源天线单元(active antenna unit，AAU)；也可以为客户终端设备(customer premises equipment，CPE)，还可以为其它形态，本申请不限定。
应理解，图11所示的接入网设备1100能够实现前文方法实施例(比如，图2-图8)中涉及的接入网设备功能。接入网设备1100中的各个单元的操作和/或功能，分别为了实现本申请方法实施例中由接入网设备执行的相应流程。为避免重复，此处适当省略详述描述。图11示例的接入网设备的结构仅为一种可能的形态，而不应对本申请实施例构成任何限定。本申请并不排除未来可能出现的其他形态的接入网设备结构的可能。
图12提供了一种终端设备的结构示意图。该终端设备可适用于图1所示出的场景中。为了便于说明，图12仅示出了终端设备的主要部件。如图12所示，终端设备1600包括处理器、存储器、控制电路、天线以及输入输出装置。处理器主要用于对通信协议以及通信数据进行处理，以及对整个终端进行控制，执行软件程序，处理软件程序的数据。存储器主要用于存储软件程序和数据。射频电路主要用于基带信号与射频信号的转换以及对射频信号的处理。天线主要用于收发电磁波形式的射频信号。输入输出装置，例如触摸屏、显示屏，键盘等主要用于接收用户输入的数据以及对用户输出数据。
当终端设备开机后，处理器可以读取存储单元中的软件程序，解析并执行软件程序的指令，处理软件程序的数据。当需要通过无线发送数据时，处理器对待发送的数据进行基带处理后，输出基带信号至射频电路，射频电路将基带信号进行处理后得到射频信号并将射频信号通过天线以电磁波的形式向外发送。当有数据发送到终端设备时，射频电路通过天线接收到射频信号，该射频信号被进一步转换为基带信号，并将基带信号输出至处理器，处理器将基带信号转换为数据并对该数据进行处理。
为了便于说明，图12仅示出了一个存储器和处理器。在实际的终端设备中，可以存在多个处理器和存储器。存储器也可以称为存储介质或者存储设备等，本发明实施例对此不做限制。
作为一种可选的实现方式，处理器可以包括基带处理器和中央处理器，基带处理器主要用于对通信协议以及通信数据进行处理，中央处理器主要用于对整个终端设备进行控制，执行软件程序，处理软件程序的数据。图12中的处理器集成了基带处理器和中央处理器的功能，本领域技术人员可以理解，基带处理器和中央处理器也可以是各自独立的处理器，通过总线等技术互联。本领域技术人员可以理解，终端设备可以包括多个基带处理器以适应不同的网络制式，终端设备可以包括多个中央处理器以增强其处理能力，终端设备的各个部件可以通过各种总线连接。所述基带处理器也可以表述为基带处理电路或者基带处理芯片。所述中央处理器也可以表述为中央处理电路或者中央处理芯片。对通信协议以及通信数据进行处理的功能可以内置在处理器中，也可以以软件程序的形式存储在存储单元中，由处理器执行软件程序以实现基带处理功能。
在一个例子中，可以将具有收发功能的天线和控制电路视为终端设备1600的收发单元1611，将具有处理功能的处理器视为终端设备1600的处理单元1612。如图12所示， 终端设备1600包括收发单元1611和处理单元1612。收发单元也可以称为收发器、收发机、收发装置等。可选的，可以将收发单元1611中用于实现接收功能的器件视为接收单元，将收发单元1611中用于实现发送功能的器件视为发送单元，即收发单元1611包括接收单元和发送单元。示例性的，接收单元也可以称为接收机、接收器、接收电路等，发送单元可以称为发射机、发射器或者发射电路等。可选的，上述接收单元和发送单元可以是集成在一起的一个单元，也可以是各自独立的多个单元。上述接收单元和发送单元可以在一个地理位置，也可以分散在多个地理位置。
本领域技术人员还可以了解到本申请实施例列出的各种说明性逻辑块(illustrative logical block)和步骤(step)可以通过电子硬件、电脑软件，或两者的结合进行实现。这样的功能是通过硬件还是软件来实现取决于特定的应用和整个系统的设计要求。本领域技术人员可以对于每种特定的应用，可以使用各种方法实现所述的功能，但这种实现不应被理解为超出本申请实施例保护的范围。
应理解，本申请实施例中的处理器可以是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例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、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件，还可以是系统芯片(system on chip，SoC)，还可以是中央处理器(central processor unit，CPU)，还可以是网络处理器(network processor，NP)，还可以是数字信号处理电路(digital signal processor，DSP)，还可以是微控制器(micro controller unit，MCU)，还可以是可编程控制器(programmable logic device，PLD)或其他集成芯片。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该处理器也可以是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。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
本申请所描述的技术可通过各种方式来实现。例如，这些技术可以用硬件、软件或者硬件结合的方式来实现。对于硬件实现，用于在通信装置(例如，基站，终端、网络实体、或芯片)处执行这些技术的处理单元，可以实现在一个或多个通用处理器、DSP、数字信号处理器件、ASIC、可编程逻辑器件、FPGA、或其它可编程逻辑装置，离散门或晶体管逻辑，离散硬件部件，或上述任何组合中。通用处理器可以为微处理器，可选地，该通用处理器也可以为任何传统的处理器、控制器、微控制器或状态机。处理器也可以通过计算装置的组合来实现，例如数字信号处理器和微处理器，多个微处理器，一个或多个微处理器联合一个数字信号处理器核，或任何其它类似的配置来实现。
可以理解，本申请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，或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 ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM， EEPROM)或闪存。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 RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(direct rambus RAM，DR RAM)。应注意，本文描述的系统和方法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。
本申请还提供了一种计算机可读介质，其上存储有计算机程序，该计算机程序被计算机执行时实现上述任一方法实施例的功能。
本申请还提供了一种计算机程序产品，该计算机程序产品被计算机执行时实现上述任一方法实施例的功能。
根据本申请实施例提供的方法，本申请还提供一种系统，其包括前述的一个或多个终端设备以及一个或多个接入网设备。可选地，该系统还可以包括核心网网元。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机指令时，全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质(例如，软盘、硬盘、磁带)、光介质(例如，高密度数字视频光盘(digital video disc，DVD))、或者半导体介质(例如，固态硬盘(solid state disk，SSD))等。
应理解，说明书通篇中提到的“实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此，在整个说明书各个实施例未必一定指相同的实施例。此外，这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解，在本申请的各种实施例中，上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定，而不应对本申请实施例的实施过程构成任何限定。
还应理解，在本申请中，“当…时”、“若”以及“如果”均指在某种客观情况下UE或者基站会做出相应的处理，并非是限定时间，且也不要求UE或基站实现时一定要有判断的动作，也不意味着存在其它限定。
本领域普通技术人员可以理解：本申请中涉及的第一、第二等各种数字编号仅为描述方便进行的区分，并不用来限制本申请实施例的范围，也表示先后顺序。
本申请中对于使用单数表示的元素旨在用于表示“一个或多个”，而并非表示“一个 且仅一个”，除非有特别说明。本申请中，在没有特别说明的情况下，“至少一个”旨在用于表示“一个或者多个”，“多个”旨在用于表示“两个或两个以上”。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况，其中A可以是单数或者复数，B可以是单数或者复数。
字符“/”一般表示前后关联对象是一种“或”的关系。
本文中术语“……中的至少一个”或“……中的至少一种”，表示所列出的各项的全部或任意组合，例如，“A、B和C中的至少一种”，可以表示：单独存在A，单独存在B，单独存在C，同时存在A和B，同时存在B和C，同时存在A、B和C这六种情况，其中A可以是单数或者复数，B可以是单数或者复数，C可以是单数或者复数。
应理解，在本申请各实施例中，“与A相应的B”表示B与A相关联，根据A可以确定B。但还应理解，根据A确定B并不意味着仅仅根据A确定B，还可以根据A和/或其它信息确定B。
本申请中各表所示的对应关系可以被配置，也可以是预定义的。各表中的信息的取值仅仅是举例，可以配置为其他值，本申请并不限定。在配置信息与各参数的对应关系时，并不一定要求必须配置各表中示意出的所有对应关系。例如，本申请中的表格中，某些行示出的对应关系也可以不配置。又例如，可以基于上述表格做适当的变形调整，例如，拆分，合并等等。上述各表中标题示出参数的名称也可以采用通信装置可理解的其他名称，其参数的取值或表示方式也可以通信装置可理解的其他取值或表示方式。上述各表在实现时，也可以采用其他的数据结构，例如可以采用数组、队列、容器、栈、线性表、指针、链表、树、图、结构体、类、堆、散列表或哈希表等。
这里作统一说明，本申请实施例中的“预定义”可以理解为定义、预先定义、存储、预存储、预协商、预配置、固化、或预烧制。本申请实施例中的配置可以理解为通过RRC信令、MAC信令、物理层信息通知，其中物理层信息可以通过PDCCH或PDSCH传输。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，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，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的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，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(read-only memory，ROM)、随机存取存储器(random access memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以所述权利要求的保护范围为准。

Claims (19)

  1. 一种通信方法，其特征在于，包括：
    第一接入网设备广播第一标识，所述第一标识用于标识第一接入网网络切片的信息；
    所述第一接入网设备向终端设备发送无线资源控制RRC消息，所述RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。
  2. 根据权利要求1所述的方法，其特征在于，在所述第一接入网网络设备向所述终端设备发送RRC消息之前，所述方法还包括：
    所述第一接入网设备接收来自所述终端设备的请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
  3. 根据权利要求1或2所述的方法，其特征在于，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
  4. 根据权利要求3所述的方法，其特征在于，所述方法还包括：
    所述第一接入网设备接收来自所述第二接入网设备的第一消息，所述第一消息包括所述第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息。
  5. 一种通信方法，其特征在于，包括：
    终端设备获取第一标识，所述第一标识用于标识第一接入网网络切片的信息；
    所述终端设备接收来自第一接入网设备的RRC消息，所述RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。
  6. 根据权利要求5所述的方法，其特征在于，在所述终端设备接收来自第一接入网设备的RRC消息之前，所述方法还包括：
    所述终端设备向所述第一接入网设备发送请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
  7. 根据权利要求5或6所述的方法，其特征在于，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
  8. 一种通信装置，其特征在于，包括：处理模块和发送模块；
    所述处理模块，用于广播第一标识，所述第一标识用于标识第一接入网网络切片的信息；
    所述发送模块用于，向终端设备发送无线资源控制RRC消息，所述RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。
  9. 根据权利要求8所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收来自所述终端设备的请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
  10. 根据权利要求8或9所述的装置，其特征在于，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
  11. 根据权利要求10所述的装置，其特征在于，所述装置还包括：
    接收模块，用于接收来自所述第二接入网设备的第一消息，所述第一消息包括所述第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息。
  12. 一种通信装置，其特征在于，包括：处理模块和接收模块；
    所述处理模块，用于获取第一标识，所述第一标识用于标识第一接入网网络切片的信息；
    所述接收模块，用于接收来自第一接入网设备的RRC消息，所述RRC消息包括与所述第一标识对应的至少一个第一网络切片的信息。
  13. 根据权利要求12所述的装置，其特征在于，所述装置还包括：
    发送模块，用于向所述第一接入网设备发送请求消息，所述请求消息用于请求与所述第一标识对应的至少一个第一网络切片的信息。
  14. 根据权利要求12或13所述的装置，其特征在于，所述RRC消息还包括第二标识，以及与所述第二标识对应的至少一个第二网络切片的信息，所述第二标识用于标识第二接入网网络切片的信息。
  15. 一种装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求1至4中任一项所述的方法。
  16. 一种装置，其特征在于，包括：处理器，所述处理器与存储器耦合，所述存储器用于存储程序或指令，当所述程序或指令被所述处理器执行时，使得所述装置执行如权利要求5至7中任一项所述的方法。
  17. 一种计算机可读存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得计算机执行如权利要求1至4中任一项所述的方法。
  18. 一种计算机可读存储介质，其上存储有计算机程序或指令，其特征在于，所述计算机程序或指令被执行时使得计算机执行如权利要求5至7中任一项所述的方法。
  19. 一种通信系统，包括以下装置中的一项或多项：如权利要求15中所述的装置，权利要求16中所述的装置。
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