WO2019242724A1 - 通信方法、寻呼方法、设备和系统 - Google Patents

通信方法、寻呼方法、设备和系统 Download PDF

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Publication number
WO2019242724A1
WO2019242724A1 PCT/CN2019/092267 CN2019092267W WO2019242724A1 WO 2019242724 A1 WO2019242724 A1 WO 2019242724A1 CN 2019092267 W CN2019092267 W CN 2019092267W WO 2019242724 A1 WO2019242724 A1 WO 2019242724A1
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WIPO (PCT)
Prior art keywords
terminal device
network device
access network
message
request message
Prior art date
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PCT/CN2019/092267
Other languages
English (en)
French (fr)
Inventor
韩锋
晋英豪
奥鲁佛松·亨里克
谭巍
娄崇
Original Assignee
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 EP19821931.3A priority Critical patent/EP3787342A4/en
Publication of WO2019242724A1 publication Critical patent/WO2019242724A1/zh
Priority to US17/117,789 priority patent/US20210099921A1/en

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/02—Arrangements for increasing efficiency of notification or paging channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0064—Transmission or use of information for re-establishing the radio link of control information between different access points
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/087—Reselecting an access point between radio units of access points
    • 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
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data

Definitions

  • the present application relates to the field of communications, and in particular, to a communication method, a paging method, a device, and a system.
  • Network slicing As a key technology of 5G, network slicing has received extensive attention and research in 3GPP and various other international standardization organizations. It can meet the operator's customized requirements for various industrial, vertical markets and various virtual operation services. Network slicing can include all resources that can meet business needs. For example, network slices may include core network control and user plane network functions and resources, and air interface access networks.
  • the present application provides a communication method, a paging method, a device, and a system, which can improve communication efficiency.
  • a communication method including: a target access network device receives a handover request message sent by a source access network device, the handover request message is used to request a terminal device to switch from the source access network device to The target access network device; the target access network device obtains network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device .
  • the target access network device can obtain the network slice selection auxiliary information supported by the terminal device, so as to facilitate the target access network.
  • the device selects auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the method further includes that the target access network device sends a path transfer request message to the core network device, and the path transfer request message is used to request that the terminal device be connected from the source.
  • the network access device switches to the target access network device; and acquiring the network slice selection assistance information supported by the terminal device includes the target access network device receiving a path from the core network device A transfer response message, where the path transfer response message includes network slice selection assistance information supported by the terminal device.
  • the target access network device may obtain a network slice selection supported by the terminal device from the core network device through a path transfer request message.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the method further includes: the target access network device sends a registration request message to the core network device, where the registration request message is used to request to update the registration area of the terminal device; the target access Acquiring, by the network device, the auxiliary information of the network slice selection supported by the terminal device, the target access network device receiving a first message from the core network device, the first message including a registration acceptance message and a network supported by the terminal device The slice selection assistance information, and the registration acceptance message is used to respond to the registration request message.
  • the target access network device may obtain the network slice selection supported by the terminal device from the core network device during the registration update process.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the method further includes: before sending the registration request message, the target access network device receives a registration request message from the terminal device, where the registration request message is used to request to update the terminal Registration area of the device; after receiving the first message, the target access network device sends a second message to the terminal device, the second message including the registration acceptance message and a network supported by the terminal device The slice selection assistance information, and the registration acceptance message is used to respond to the registration request message.
  • the target access network device may send the network device selection assistance supported by the terminal device to the terminal device during the registration update process.
  • Information so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • the handover request message includes network slice selection assistance information supported by the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the network supported by the terminal device.
  • Slice selection auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the handover request message further includes registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the registration area of the terminal device. Information, so that the target access network device can determine whether the network slice selection auxiliary information supported by the terminal device in the handover request message is valid according to the registration area information, and improves communication efficiency.
  • a communication method including: a core network device receives a path transfer request message from a target access network device, the path transfer request message is used to request a terminal device to be switched from a source access network device to the Target access network device; the core network device sends a path transfer response message to the target access network device, the path transfer response message includes network slice selection assistance information supported by the terminal device, The network slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the core network device may send a network slice selection assistance supported by the terminal device to the access network device through a path transfer request message.
  • Information so that the target access network device selects auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • a communication method including: a core network device receives a registration request message from a target access network device, the registration request message is used to request an update of a registration area of a terminal device; and the core network device connects to the target.
  • the network access device sends a first message, where the first message includes a registration acceptance message and auxiliary information for network slice selection supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • the core network device may send the network slice selection supported by the terminal device to the target access network device during the registration update process.
  • Auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • a communication method including: a terminal device sends a registration request message to an access network device, where the registration request message is used to request to update a registration area of the terminal device;
  • the network access device receives a second message, where the second message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • the terminal device may receive the network slice selection assistance supported by the terminal device from the target access network device during the registration update process. Information, so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • a communication method including: a source access network device generates a handover request message, where the handover request message is used to request a terminal device to switch from the source access network device to a target access network device;
  • the handover request message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device;
  • the source access network device sends a The target access network device sends the handover request message.
  • the handover request message sent by the source access network device to the target access network device includes the network supported by the terminal device.
  • Slice selection auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the handover request message further includes registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the registration area of the terminal device. Information, so that the target access network device can determine whether the network slice selection auxiliary information supported by the terminal device in the handover request message is valid according to the registration area information, and improves communication efficiency.
  • a paging method including: an access network device receives a first paging message, the first paging message includes first information, and the first information includes at least one of the following: a network Sliced information, quality of service flow identifier (QoS, flow ID, QFI), 5th generation mobile communication technology service quality identifier (5G, quality of service, identifier, 5G, QoS ID, 5QI), 5QI, allocation and competition Priority (Allocation, Retention, Priority, ARP), data network name (DNN); after receiving the first paging message, the access network device sends a second paging message to the terminal device.
  • QoS quality of service flow identifier
  • 5G quality of service, identifier, 5G, QoS ID, 5QI
  • DNN data network name
  • the paging message received by the access network device may include first information, and the first information may include information about network slices, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the second paging message includes the first information.
  • the terminal device is in an idle state
  • the access network device receiving the first paging message includes: the access network device receiving the first paging message from a core network device .
  • the first paging message received by the access network device from the core network device may include first information, and the first information may include network slice information, QFI , 5QI, ARP or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the terminal device is in an inactive state
  • the access network device is a first access network device
  • the access network device receives a first paging message, including: the first An access network device receives the first paging message from a second access network device, wherein the first access network device is an access network device where the terminal device currently resides, and the second access The network device is an access network device where the terminal device resided last time.
  • the first access network device on which the terminal device currently resides receives the first page received from the second access network device on which the terminal device resided last time.
  • the message may include first information, and the first information may include network slice information, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • a paging method including: a core network device generating a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: a network slice QFI; 5QI; DNN; the core network device sends the first paging message to the access network device.
  • the first paging message sent by the core network device to the access network device may include first information, and the first information may include network slice information, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • a paging method including: a second access network device generating a first paging message, the first paging message corresponding to a terminal device, and the first paging message including the first paging message Information, the first information includes at least one of the following: information about network slices, QFI, 5QI, ARP, DNN; the second access network device sends the first paging message to the first access network device, The first access network device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • the first paging message sent by the second access network device where the terminal device last stayed to the first access network device where it currently resides may include first information, and the first information may Including network slice information, QFI, 5QI, ARP or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • a ninth aspect provides a communication method, including: a first access network device sending a terminal device context request message to a second access network device, the terminal device context request message being used to request a terminal device context,
  • the first access network device is an access network device in which the terminal device currently resides, and the second access network device is an access network device in which the terminal device last resided;
  • the first An access network device receives a terminal device context response message from the second access network device, and the terminal terminal context response message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information It is used to indicate a network slice supported by the terminal device.
  • the first access network device on which the terminal device currently resides obtains the terminal from the second access network device on which the terminal device last resided.
  • a device context response message, and the acquiring terminal device context response message includes network slice selection auxiliary information supported by the terminal device, so that the first access network device selects the auxiliary information according to the network slice, and performs communication with the terminal device.
  • Related communication thus improving communication efficiency.
  • the terminal device is in an inactive state.
  • the method further includes that the first access network device receives registration area information of the terminal device from the second access network device, where the registration area information is used to indicate the terminal The tracking area corresponding to the device.
  • the first access network device on which the terminal device currently resides obtains the terminal from the second access network device on which the terminal device last resided.
  • the registration area information of the device so that the first access network device determines whether the network slice selection auxiliary information supported by the terminal device sent by the second access network device is valid according to the registration area information, and improves communication efficiency.
  • a communication method including: a second access network device receiving a terminal device context request message from the first access network device, the terminal device context request message being used to request a context of the terminal device,
  • the first access network device is an access network device in which the terminal device currently resides, and the second access network device is an access network device in which the terminal device last resided;
  • the first The two access network devices send a terminal device context response message to the first access network device, where the terminal terminal context response message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information It is used to indicate a network slice supported by the terminal device.
  • the second access network device where the terminal device last stayed sends the terminal to the first access network device where the terminal device currently resides.
  • a device context response message, and the obtaining terminal device context response message includes network slice selection assistance information supported by the terminal device, so that the first access network device selects the assistance information according to the network slice, and performs a connection with the terminal device.
  • the terminal device is in an inactive state.
  • the method further includes: sending, by the second access network device, the registration area information of the terminal device to the first access network device, where the registration area information is used to indicate the terminal The tracking area corresponding to the device.
  • the second access network device where the terminal device last stayed sends the terminal to the first access network device where the terminal device currently resides.
  • the registration area information of the device so that the first access network device determines whether the network slice selection auxiliary information supported by the terminal device sent by the second access network device is valid according to the registration area information, and improves communication efficiency.
  • a communication method which includes: an access network device receives a third message from a terminal device, the third message includes a service request message, and the service request message is used to request the terminal device from idle State to connected state, the third message further includes at least one of the following: network slice selection assistance information and single network slice selection assistance information supported by the terminal device; the access network device sends a fourth to the core network device Message, the fourth message includes the service request message.
  • the access network device receives a third message sent by the terminal device, where the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • S-NSSAI single network slice selection assistance information
  • the third message is a radio resource control (radio resource control (RRC) establishment request message or an RRC establishment completion message.
  • RRC radio resource control
  • a communication method including: the terminal device generates a third message, the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to a connected state
  • the third message further includes at least one of the following: network slice selection assistance information and single network slice selection assistance information supported by the terminal device; and the terminal device sends the third message to an access network device.
  • the third message is an RRC establishment request message or an RRC establishment completion message.
  • an access network device has a function of implementing the access network device in the foregoing method embodiment. These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • the access network device may include, for example, the above-mentioned access network device, target access network device, source access network device, first access network device, second access network device, and the like.
  • a core network device in a fourteenth aspect, has a function of implementing the core network device in the foregoing method embodiment.
  • These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a terminal device in a fifteenth aspect, has a function of implementing the terminal device in the foregoing method embodiment.
  • These functions can be implemented by hardware, or they can be implemented by hardware to execute corresponding software.
  • the hardware or software includes one or more units corresponding to the functions described above.
  • a communication system includes the access network device according to the thirteenth aspect and the core network device according to the fourteenth aspect, or the communication system includes the thirteenth aspect.
  • the access network device, the core network device according to the fourteenth aspect, and the terminal device according to the fifteenth aspect are provided.
  • a communication apparatus may be an access network device in the foregoing method embodiment, or a chip provided in the access network device.
  • the communication device includes: a memory for storing computer executable program code; a communication interface; and a processor, the processor being coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions.
  • the communication apparatus is caused to execute the method performed by the access network device in the foregoing method embodiment.
  • the access network device may include, for example, the above-mentioned access network device, target access network device, source access network device, first access network device, second access network device, and the like.
  • a communication device may be a core network device in the foregoing method embodiment, or a chip provided in the core network device.
  • the communication device includes: a memory for storing computer executable program code; a communication interface; and a processor, the processor being coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions. When the processor executes the instructions, the communication apparatus is caused to execute the method performed by the core network device in the foregoing method embodiment.
  • a communication device may be a terminal device in the foregoing method embodiment or a chip provided in the terminal device.
  • the communication device includes: a memory for storing computer executable program code; a communication interface; and a processor, the processor being coupled to the memory and the communication interface.
  • the program code stored in the memory includes instructions. When the processor executes the instructions, the communication apparatus is caused to execute the method performed by the terminal device in the foregoing method embodiment.
  • a communication system including the communication device according to the seventeenth aspect and the communication device according to the eighteenth aspect, or the communication system includes the communication device according to the seventeenth aspect Communication device, the communication device of the eighteenth aspect, and the communication device of the nineteenth aspect.
  • a computer program product includes: computer program code that, when the computer program code runs on a computer, causes the computer to execute the methods in the above aspects.
  • a computer-readable medium stores program code, and when the computer program code runs on a computer, the computer causes the computer to execute the methods in the foregoing aspects.
  • the present application provides a chip system that includes a processor for accessing a network device to implement the functions involved in the foregoing aspects, for example, receiving or processing data involved in the foregoing methods. And / or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the access network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • the access network device may include, for example, the above-mentioned access network device, target access network device, source access network device, first access network device, second access network device, and the like.
  • the present application provides a chip system including a processor, which is used by a core network device to implement the functions involved in the foregoing aspects, for example, receiving or processing data and / Or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the core network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • the present application provides a chip system that includes a processor for a terminal device to implement the functions involved in the foregoing aspects, for example, receiving or processing data involved in the foregoing method and / Or information.
  • the chip system further includes a memory, and the memory is configured to store program instructions and data necessary for the core network device.
  • the chip system may be composed of chips, and may also include chips and other discrete devices.
  • an access network device is provided, where the access network device is a target access network device, and includes: a communication unit, configured to receive a handover request message sent by a source access network device, the handover A request message is used to request a terminal device to switch from the source access network device to the target access network device; a processing unit is configured to obtain network slice selection assistance information supported by the terminal device, and a network supported by the terminal device The slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the target access network device can obtain the network slice selection auxiliary information supported by the terminal device, so as to facilitate the target access network.
  • the device selects auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the communication unit is further configured to send a path transfer request message to the core network device, and the path transfer request message is used to request the terminal device to access the network device from the source.
  • the processing unit is configured to receive a path transfer response message from the core network device through the communication unit, the The path transfer response message includes network slice selection assistance information supported by the terminal device.
  • the target access network device may obtain a network slice selection supported by the terminal device from the core network device through a path transfer request message.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the communication unit is further configured to send a registration request message to a core network device, where the registration request message is used to request an update of a registration area of the terminal device;
  • the processing unit is configured to receive a first message from a core network device through the communication unit, where the first message includes a registration acceptance message and network slice selection assistance information supported by the terminal device. The registration acceptance message is used to respond to the registration request message.
  • the target access network device may obtain the network slice selection supported by the terminal device from the core network device during the registration update process.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the communication unit is configured to receive a registration request message from the terminal device before sending the registration request message, and the registration request message is used to request to update a registration area of the terminal device. ; The communication unit is further configured to send a second message to the terminal device after receiving the first message, the second message including the registration acceptance message and network slice selection assistance information supported by the terminal device; , The registration acceptance message is used to respond to the registration request message.
  • the target access network device may send the network device selection assistance supported by the terminal device to the terminal device during the registration update process.
  • Information so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • the handover request message includes network slice selection assistance information supported by the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the network supported by the terminal device.
  • Slice selection auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the handover request message further includes registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the registration area of the terminal device. Information, so that the target access network device can determine whether the network slice selection auxiliary information supported by the terminal device in the handover request message is valid according to the registration area information, and improves communication efficiency.
  • a core network device including: a receiving unit configured to receive a path transfer request message from a target access network device, the path transfer request message being used to request that a terminal device be accessed from a source to a network The device switches to the target access network device; a sending unit, configured to send a path transfer response message to the target access network device, where the path transfer response message includes network slice selection assistance information supported by the terminal device, and The network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device.
  • the core network device may send a network slice selection assistance supported by the terminal device to the access network device through a path transfer request message.
  • Information so that the target access network device selects auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • a core network device including: a receiving unit for receiving a registration request message from a target access network device, the registration request message for requesting to update a registration area of a terminal device; a sending unit, Configured to send a first message to the target access network device, where the first message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message .
  • the core network device may send the network slice selection supported by the terminal device to the target access network device during the registration update process.
  • Auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • a terminal device including: a sending unit for sending a registration request message to an access network device, the registration request message for requesting to update a registration area of the terminal device; a receiving unit, Configured to receive a second message from the access network device, where the second message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message .
  • the terminal device may receive the network slice selection assistance supported by the terminal device from the target access network device during the registration update process. Information, so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • an access network device is provided.
  • the access network device is a source access network device, and includes: a processing unit configured to generate a handover request message, and the handover request message is used to request a terminal device from The source access network device switches to the target access network device, the switch request message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the A network slice supported by a terminal device; a communication unit, configured to send the handover request message to the target access network device.
  • the handover request message sent by the source access network device to the target access network device includes the network supported by the terminal device.
  • Slice selection auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the handover request message further includes registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • the handover request message sent by the source access network device to the target access network device includes the registration area of the terminal device. Information, so that the target access network device can determine whether the network slice selection auxiliary information supported by the terminal device in the handover request message is valid according to the registration area information, and improves communication efficiency.
  • an access network device including: a receiving unit configured to receive a first paging message, where the first paging message includes first information, and the first information includes at least the following One item: network slice information, quality of service flow identifier (QoS, flow ID) (QFI), 5th generation mobile communication technology service quality identifier (5th generation of service quality identifier, 5G QoS ID, 5QI) 5QI , Allocation and Retention Priority (ARP), data network name (DNN); a sending unit, configured to send a second page to a terminal device after receiving the first page message Message.
  • QoS, flow ID QFI
  • 5th generation mobile communication technology service quality identifier 5th generation of service quality identifier, 5G QoS ID, 5QI) 5QI
  • ARP Allocation and Retention Priority
  • DNN data network name
  • the paging message received by the access network device may include first information, and the first information may include information about network slices, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the second paging message includes the first information.
  • the terminal device is in an idle state, and in terms of receiving a first paging message, the communication unit is configured to receive the first paging message from a core network device.
  • the first paging message received by the access network device from the core network device may include first information, and the first information may include network slice information, QFI , 5QI, ARP or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the terminal device is in an inactive state
  • the access network device is a first access network device
  • the communication unit in terms of receiving a first paging message, is configured to An access network device receives the first paging message, wherein the first access network device is an access network device on which the terminal device currently resides, and the second access network device is on the terminal device. Secondary resident access network equipment.
  • the first access network device on which the terminal device currently resides receives the first page received from the second access network device on which the terminal device last resided
  • the message may include first information, and the first information may include network slice information, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • a core network device including: a processing unit configured to generate a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: Item: information of the network slice; QFI; 5QI; DNN; a communication unit, configured to send the first paging message to an access network device.
  • the first paging message sent by the core network device to the access network device may include first information, and the first information may include network slice information, QFI, 5QI, ARP or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • an access network device including: a processing unit configured to generate a first paging message, where the first paging message corresponds to a terminal device, and the first paging message includes First information, the first information includes at least one of the following: information on network slices, QFI, 5QI, ARP, DNN; a communication unit for sending the first paging message, wherein the first access network The device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • the first paging message sent by the second access network device where the terminal device last stayed to the first access network device where it currently resides may include first information, and the first information may Including network slice information, QFI, 5QI, ARP or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • an access network device is provided, where the access network device is a target access network device and includes:
  • a communication interface receives a handover request message sent by a source access network device, and the handover request message is used to request a terminal device to switch from the source access network device to the target access network device;
  • Network slice selection assistance information and the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device.
  • the processor is further configured to send a path transfer request message to the core network device through the communication interface, and the path transfer request message is used to request that the terminal device be removed from the terminal device.
  • the source access network device switches to the target access network device; in terms of acquiring the network slice selection assistance information supported by the terminal device, the processing is used to receive a path from the core network device through the communication interface A transfer response message, where the path transfer response message includes network slice selection assistance information supported by the terminal device.
  • the processor is further configured to send a registration request message to a core network device through the communication interface, where the registration request message is used to request to update a registration area of the terminal device;
  • the processor is configured to receive a first message from a core network device through the communication interface, where the first message includes a registration acceptance message and a network supported by the terminal device The slice selection assistance information, and the registration acceptance message is used to respond to the registration request message.
  • the processor is further configured to receive the registration request message from the terminal device through the communication interface before sending the registration request message; and before receiving the first message After that, a second message is sent to the terminal device through the communication interface, and the second message includes the registration acceptance message and network slice selection assistance information supported by the terminal device.
  • the handover request message includes network slice selection assistance information supported by the terminal device.
  • the handover request message further includes registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • a core network device which includes: a communication interface, a memory, for storing instructions, and a processor, which are respectively connected to the memory and the communication interface, and are used for executing all the storage in the memory.
  • the instruction is executed to execute the following steps when the instruction is executed: receiving a path transfer request message from a target access network device through the communication interface, the path transfer request message is used to request a terminal device to be switched from a source access network device To the target access network device; sending a path transfer response message to the target access network device through the communication interface, the path transfer response message including network slice selection assistance information supported by the terminal device, and the terminal
  • the network slice selection assistance information supported by the device is used to indicate the network slice supported by the terminal device.
  • a core network device including: a communication interface, a memory, for storing instructions, and a processor, which are respectively connected to the memory and the communication interface, and are used for executing all the storage in the memory.
  • the instruction is executed to perform the following steps when the instruction is executed: receiving a registration request message from a target access network device through the communication interface, the registration request message being used to request an update of a registration area of a terminal device; through the communication interface Sending a first message to the target access network device, where the first message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • a terminal device including: a communication interface, a memory, for storing instructions, and a processor, respectively connected to the memory and the communication interface, for executing the memory stored in the memory.
  • an access network device including: a communication interface, a memory, for storing instructions, and a processor, respectively connected to the memory and the communication interface, for executing the memory storage
  • QoS quality of service flow identifier
  • 5th generation mobile communication technology service quality identifier 5th generation, quality of service, identifier, 5G, QoS ID, 5QI),
  • the second paging message includes the first information.
  • the terminal device is in an idle state.
  • the processor is configured to receive the first paging message from a core network device through the communication interface.
  • the terminal device is in an inactive state
  • the access network device is a first access network device
  • the communication unit in terms of receiving a first paging message, is configured to An access network device receives the first paging message, wherein the first access network device is an access network device on which the terminal device currently resides, and the second access network device is on the terminal device. Secondary resident access network equipment.
  • a core network device including: a communication interface, a memory, for storing instructions, and a processor, which are respectively connected to the memory and the communication interface, and are used for executing all the storage in the memory.
  • an access network device including: a communication interface, a memory, for storing instructions, and a processor, which are respectively connected to the memory and the communication interface, and are used for executing all the storage in the memory.
  • the information includes at least one of the following: information of a network slice, QFI, 5QI, ARP, DNN; and sending the first paging message through a communication interface, wherein the first access network device is a device in which the terminal device currently resides.
  • An access network device, and the second access network device is an access network device where the terminal device resided last time.
  • FIG. 1 is a schematic diagram of an application environment according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of an application environment according to another embodiment of the present application.
  • FIG. 3 is a schematic diagram of an application environment according to another embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 5 is a specific example diagram of a communication method according to another embodiment of the present application.
  • FIG. 6 is a specific example diagram of a communication method according to another embodiment of the present application.
  • FIG. 7 is a schematic flowchart of a communication method according to another embodiment of the present application.
  • FIG. 8 is a specific example diagram of a communication method according to another embodiment of the present application.
  • FIG. 9 is a schematic flowchart of a communication method according to another embodiment of the present application.
  • FIG. 10 is a specific example diagram of a communication method according to another embodiment of the present application.
  • FIG. 11 is a schematic flowchart of a paging method according to an embodiment of the present application.
  • FIG. 12 is a specific example diagram of a paging method according to another embodiment of the present application.
  • FIG. 13 is a specific example diagram of a paging method according to another embodiment of the present application.
  • FIG. 14 is a specific example diagram of a paging method according to another embodiment of the present application.
  • FIG. 15 is a schematic structural diagram of an access network device according to an embodiment of the present application.
  • FIG. 16 is a schematic structural diagram of a core network device according to an embodiment of the present application.
  • FIG. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 18 is a schematic structural diagram of an access network device according to another embodiment of the present application.
  • FIG. 19 is a schematic structural diagram of a core network device according to another embodiment of the present application.
  • FIG. 20 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • FIG. 21 is a schematic structural diagram of an access network device according to another embodiment of the present application.
  • FIG. 22 is a schematic structural diagram of a core network device according to another embodiment of the present application.
  • FIG. 23 is a schematic structural diagram of a terminal device according to another embodiment of the present application.
  • GSM global mobile communication
  • CDMA code division multiple access
  • CDMA wideband code division multiple access
  • WCDMA wideband code division multiple access
  • GPRS general packet radio service
  • LTE long term evolution
  • FDD LTE frequency division duplex
  • TDD time division duplex
  • UMTS universal mobile communication system
  • WiMAX global interconnected microwave access
  • 5G future generation
  • NR new radio
  • the terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or User device.
  • Terminal equipment can also be cellular phones, cordless phones, session initiation protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), and wireless communications Functional handheld devices, computing devices or other processing devices connected to wireless modems, in-vehicle devices, wearable devices, terminal devices in future 5G networks, or public land mobile networks (PLMN) in future evolution Terminal equipment and the like are not limited in this embodiment of the present application.
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDAs personal digital assistants
  • PLMN public land mobile networks
  • the access network device in the embodiment of the present application may be a device for communicating with a terminal device, and the access network device may be a global system for mobile communications (GSM) system or a code division multiple access (code division multiple access) (CDMA) base station (Base Transceiver Station (BTS)) can also be a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved type in an LTE system
  • the base station evoled NodeB, eNB or eNodeB
  • the access network device may be a relay station, an access point, an in-vehicle device, Wearable devices and base stations (gNB) in future 5G networks or base stations in future evolved PLMN networks, etc., or access points (AN), such as 5G-AN.
  • the above access network device may also be composed of a centralized unit (CU) and a distributed unit (DU).
  • CU centralized unit
  • DU distributed unit
  • the core network device may include, for example, a user plane function (UPF) entity, an access and mobility management function (AMF), and a session management function (Session management function). , SMF).
  • UPF user plane function
  • AMF access and mobility management function
  • Session management function Session management function
  • the terminal device, the access network device or the core 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.
  • This hardware layer includes hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory).
  • the operating system may be any one or more computer operating systems that implement business processing through processes, such as a Linux operating system, a Unix operating system, an Android operating system, an iOS operating system, or a windows operating system.
  • This application layer contains applications such as browsers, address books, word processing software, and instant messaging software.
  • the embodiment of the present application does not specifically limit the specific structure of the execution subject of the method provided by the embodiment of the present application, as long as the program that records the code of the method provided by the embodiment of the application can be run to provide the program according to the embodiment of the application.
  • the communication may be performed by using the method described above.
  • the method execution subject provided in the embodiment of the present application may be a terminal device or a network device, or a function module in the terminal device or the network device that can call a program and execute the program.
  • various aspects or features of the application may be implemented as a method, apparatus, or article of manufacture using standard programming and / or engineering techniques.
  • article of manufacture 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 (eg, hard disks, floppy disks, or magnetic tapes, etc.), optical disks (eg, compact discs (CDs), digital versatile discs (DVDs) 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 used to store information.
  • machine-readable medium may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instruction (s) and / or data.
  • NSSAI Network slice selection assistance information
  • PLMN Packet Control Protocol
  • An NSSAI may consist of one or more S-NSSAIs. Each S-NSSAI corresponds to a specific network slice.
  • Requested NSSAI (requested NSSAI) by the terminal device: The NSSAI carried by the terminal device during the registration process.
  • a radio access network radio access network, RAN
  • AMF access and mobility management functions
  • TAU tracking area update
  • S-NSSAI Single network slice selection auxiliary information
  • S-NSSAI corresponds to a specific network slice.
  • the S-NSSAI may include a slice / service type (SST).
  • the S-NSSAI may also include a network slice differentiation identifier (SD).
  • SST indicates the characteristics and services that the desired network can provide.
  • SD can be used as supplementary information for SST when selecting network slice instances (NSI). For example, when the SST points to multiple NSIs, the SD can further divide these NSIs.
  • the NSSAI supported by the terminal device may also be referred to as allowed NSSAI (allowed NSSAI) or allowed S-NSSAI (allowed S-NSSAI).
  • the NSSAI supported by a terminal device refers to one or more S-NSSAIs available to the terminal device in the current registration area.
  • the NSSAI supported by the terminal device may refer to all S-NSSAIs supported by the terminal device.
  • the terminal device can obtain the NSSAI supported by the terminal device from the core network device during the registration process.
  • QoS flow 5G defines a data packet processing mechanism on the air interface based on the data resource bearer (DRB).
  • Data packets served by a DRB have the same packet processing mechanism in air interface transmission.
  • the base station can establish multiple DRBs with the terminal equipment to satisfy QoS flows with different packet processing requirements. It should be noted that the same DRB may have a mapping relationship with one QoS flow, or may have a mapping relationship with multiple QoS flows.
  • the base station may map the downlink data packet corresponding to the QoS flow to the corresponding DRB based on the QFI identifier and the QoS profile corresponding to the QFI, and perform downlink transmission.
  • the terminal device maps the uplink data packet corresponding to the QoS flow to the corresponding DRB according to the mapping relationship between the QoS flow and the DRB configured by the base station, and performs uplink transmission.
  • Parameters of the QoS flow can also be referred to as the configuration parameters of the QoS flow.
  • each QoS flow includes at least the following parameters: 5G QoS identifier (5QI), allocation and retention priority (ARP) parameters.
  • 5QI 5G QoS identifier
  • ARP allocation and retention priority
  • 5G QoS Identifier QoS identifier in 5G.
  • Inactive state In this state, both the terminal device and the last-accessed access network device save the terminal device access layer context information, and the last-accessed access network device is related to the core network reserved terminal device NG interface connection.
  • the terminal device moves in an area where the access network device was last configured, there is no need to notify the resident access network device.
  • an area update request is triggered.
  • FIG. 1 is a schematic diagram of an application environment according to an embodiment of the present application.
  • the terminal device 101 can move from the coverage area of the second access network device 102-2 to the coverage area of the first access network device 102-1.
  • the first access network device 102-1 and the second access network device 102-2 both belong to the access network device 102.
  • the core network device 103 may be connected to each access network device 102 respectively.
  • a communication interface may exist between the core network device 103 and the access network device 102. This communication interface may be referred to as an N2 interface or an NG interface, for example.
  • the above-mentioned core network device 103 may have a public control network function, or may provide functions such as access and mobility management for users.
  • the foregoing core network device 103 may be, for example, AMF, or may be another type of core network device exemplified above.
  • the above access network device 102 may be an LTE base station, a base station in 5G, a CU, or a DU as exemplified in the foregoing.
  • the first access network device 102-1 when the terminal device 101 is in a connected state, the first access network device 102-1 may be a target access network device, and the second access network device 102-2 may be a source access Network equipment.
  • the first access network device 102-1 when the terminal device 101 is in an idle state or an inactive state, the first access network device 102-1 may be a base station on which the terminal device 101 currently resides, and may be referred to as a new access Network equipment or new base station.
  • the second access network device 102-2 may be a base station where the terminal device 101 last resided, and may be referred to as an anchor access network device or an anchor base station.
  • FIG. 2 is a schematic diagram of a possible application environment according to another embodiment of the present application.
  • the access network device 103 may be divided into a Centralized Unit (CU) 201 and a Distributed Unit (DU) 202.
  • CU201 and DU202 can be softwareized or virtualized.
  • Radio access network functions that require flexible combination will run in CU201, such as Service Data Adaptation Protocol (SDAP) layer, Packet Data Convergence Protocol , PDCP), radio resource control (Radio Resource Control, RRC) and other high-level functions; and hardware-related and real-time requirements of RAN functions will run in DU202, such as the radio link layer control protocol (Radio Link Control, RLC) layer, physical layer (physical layer, PHY), media access control layer (Media, Access Control, MAC) and other underlying functions.
  • SDAP Service Data Adaptation Protocol
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • DU202 such as the radio link layer control protocol (Radio Link Control, RLC) layer, physical layer (physical layer, PHY), media access control layer (Media, Access Control, MAC) and other underlying functions.
  • an access network device 102 may include one CU 201, one or more DU 202.
  • CU201 and DU202 are connected by F1 interface.
  • One DU202 can only be connected to one CU201, and one CU201 can be connected to one or more DU202.
  • FIG. 3 is a schematic diagram of a possible application environment according to another embodiment of the present application.
  • Figure 3 proposes a new architecture based on the architecture of Figure 2.
  • the CU is divided into a centralized unit-user plane (CU-UP) 301 and a centralized unit- Control plane (Centralized Unit-control plane, CU-CP) 302.
  • CU-UP301 and CU-CP302 can be on different physical devices.
  • An open interface can exist between CU-UP301 and CU-CP302, and this interface can be called an E1 interface.
  • CU-UP301 and CU-CP302 and DU can have their own interfaces.
  • the interface between CU-CP302 and DU can be called F1-C interface
  • the interface between CU-UP301 and DU is F1. -U interface.
  • one access network device 102 may include one CU-CP302, multiple CU-UP302, and multiple DUs; one DU can only connect one CU-CP302; one CU-UP301 can Connect one CU-CP302; one DU can connect to multiple CU-UP301 under the control of the same CU-CP302; one CU-UP301 can connect to multiple DUs under the control of the same CU-CP302.
  • FIG. 4 is a schematic flowchart of a communication method according to an embodiment of the present application. The method of FIG. 4 includes:
  • the target access network device receives a handover request message sent by a source access network device. Accordingly, the source access network device sends the handover request message to the target access network device, and the handover request The message is used to request the terminal device to switch from the source access network device to the target access network device.
  • the terminal device may be in a connected state.
  • the terminal device can be moved from the coverage area of the source access network device to the coverage area of the target access network device.
  • the terminal device can perform cell measurement and report the measurement result to the source access network device.
  • the source access network device may determine to switch the terminal device to the target access network device according to the measurement result.
  • the handover request message may include a session list that the target access network device needs to establish for the terminal device and S-NSSAI corresponding to each session, and the session list may include all sessions currently being performed by the terminal device.
  • the session list may further include a QoS flow identifier and corresponding QoS flow parameter information included in each session.
  • the target access network device obtains network slice selection assistance information (NSSAI) supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate a network slice supported by the terminal device.
  • NSSAI network slice selection assistance information
  • the network slice selection support information supported by the terminal device may be allowed NSSAI, and allowed NSSAI may be used to indicate an identifier of all network slices supported by the terminal device.
  • the network slice selection auxiliary information supported by the terminal device may refer to all S-NSSAIs supported by the terminal device.
  • the network slice selection assistance information supported by the terminal device may include identifiers (IDs) of all network slices supported by the terminal device.
  • the terminal device moves from the coverage area of the source access network device to the coverage area of the target access network device.
  • the target access network device can obtain all The network slice selection auxiliary information supported by the terminal device is described in order to facilitate related communication and control.
  • the target access network device may locally store the network slice selection assistance information supported by the terminal device.
  • the target access network device may select auxiliary information according to a network slice supported by the terminal device, and perform communication related to the terminal device.
  • the target access network device may select the auxiliary information according to the network slice supported by the terminal device to perform network slice level differentiation processing. Including at least one of the following processing methods: instructing idle and inactive terminal devices to perform inter-frequency cell reselection of network slices; selecting a target access network device for the terminal during handover; adjusting access control parameter configuration , Such as access prohibition parameter, prohibition time, etc .; RRC measurement parameter configuration, such as measurement period, measurement threshold, measurement object (such as carrier frequency band, carrier frequency band priority, sync message block frequency band, sync message block measurement priority, channel status Information reference signal carrier frequency) and so on. Or, when a dedicated radio resource management (RRM) strategy is applied, the network slice selection support information supported by the terminal device may be taken as a consideration.
  • RRM radio resource management
  • the target access network device can obtain the network slice selection auxiliary information supported by the terminal device, so as to facilitate the target access network.
  • the device selects auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the technical solution in the embodiment of the present application may be based on switching between a direct interface (for example, an Xn interface). That is, the source access network device and the target access network device directly exchange information through an interface.
  • the technical solution in the embodiment of the present application may be based on switching between indirect interfaces (for example, N2 interfaces). That is, the source access network device and the target access network device exchange information through the core network device. That is, the core network device acts as an intermediary and forwards the switching information exchanged between the source access network device and the target access network device.
  • the source access network device and the target access network device may belong to the same registration area, or may belong to different registration areas. If the source access network device and the target access network device belong to the same registration area, the auxiliary information of the network slice selection supported by the terminal device is the same before and after the handover. If the source access network device and the target access network device belong to unregistered areas, before and after the handover, the network slice selection support information supported by the terminal device may be different, and therefore needs to be updated.
  • the target access network device obtains network slice selection assistance information supported by the terminal device, including multiple approaches.
  • the target access network device may obtain, from the core network device, network slice selection assistance information supported by the terminal device.
  • the target access network device may also obtain network slicing auxiliary information supported by the terminal device from the source access network device.
  • the target access network device acquires the network slice selection support information supported by the terminal device from the core network device, which may take the following manner: the target access network device sends a path switch request to the core network device (path switch request) message, correspondingly, the core network device receives the path transfer request message from the target access network device, and the path transfer request message is used to request that the terminal device be accessed from the source access network device Switch to the target access network device.
  • the target access network device receives a path transfer response (path switch response message) message from the core network device. Accordingly, the core network device sends the path transfer response message to the target access network device.
  • the path transfer response message includes network slice selection assistance information supported by the terminal device.
  • the target access network device may obtain a network slice selection supported by the terminal device from the core network device through a path transfer request message.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the target access network device obtains network slice selection assistance information supported by the terminal device from the core network device
  • the following method may also be adopted:
  • the target access network device sends a registration request to the core network device.
  • the core network device receives the registration request message from the target access network device, the registration request message is used to request to update the registration area of the terminal device;
  • the target access network device Receiving a first message from a core network device, and accordingly, the core network device sends the first message to the target access network device, the first message includes a registration acceptance message and the terminal device Supported network slices select auxiliary information, and the registration acceptance message is used to respond to the registration request message.
  • the first message may be an N2 interface signaling message.
  • the downlink non-access layer transmits messages.
  • the target access network device may obtain the network slice selection supported by the terminal device from the core network device during the registration update process.
  • the auxiliary information so that the target access network device selects the auxiliary information according to the network slice supported by the terminal device, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the method further includes: before the target access network device sends the registration request message, the target access network device receives the registration request message from the terminal device.
  • the terminal device sends the registration request message to the target access network device.
  • the method further includes: after the target access network device receives the first message, the target access network device sends a second message to the terminal device.
  • the terminal device receives the second message sent by the target access network device, and the second message includes the registration acceptance message and network slice selection assistance information supported by the terminal device.
  • the target access network device is equivalent to transparently transmitting the registration request message to the core network device. That is, the registration request message may be a non-access stratum (NAS) message. Similarly, the target access network device is equivalent to transparently transmitting the registration acceptance message to the terminal device.
  • the registration reception message may be NAS information.
  • the second message may be an RRC message or another type of air interface message.
  • the registration area update is not required, that is, the terminal device does not need to send a registration request message to the target access network device. Only when the source access network device and the target access network device do not belong to the same registration area, the terminal device needs to send a registration request message to the target access network device.
  • names of the messages are not limited in the embodiments of the present application.
  • the names of the messages are only examples, and other names may also be adopted for the messages, as long as the functions they implement are the same.
  • the target access network device may send the network device selection assistance supported by the terminal device to the terminal device during the registration update process.
  • Information so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • the target access network device obtains the network slice selection auxiliary information of the terminal device from the source access network device, the following manner may be adopted: the handover request message includes the network slice selection supported by the terminal device Supplementary information.
  • the target access network device may obtain the network slice selection auxiliary information supported by the terminal device from a handover request message sent by the source access network device.
  • the handover request message sent by the source access network device to the target access network device includes the network supported by the terminal device.
  • Slice selection auxiliary information so that the target access network device selects auxiliary information according to the network slice, and performs communication related to the terminal device, thereby improving communication efficiency.
  • the handover request message may further include registration area information of the terminal device, where the registration area information is used to indicate a tracking area corresponding to the terminal device.
  • the above-mentioned registered area information may include a tracking area list, and each tracking area may be represented by a tracking area code (TAC).
  • TAC tracking area code
  • Table 1 below is an example of registered area information.
  • the target access network device may determine whether the source access network device and the target access network device belong to the same registration area according to the registration area information, that is, determine whether the target access network device is located in the registration area of the terminal device. If the target access network device is also located in the registration area of the terminal device, it means that the network slice selection assistance message of the terminal device is valid. If the target access network device is not located in the registration area of the terminal device, it means that the network slice selection assistance information of the terminal device is invalid, and the target access network device needs to obtain the updated network slice selection assistance information of the terminal device from other channels. For example, the target access network device may obtain the updated network slice selection assistance information of the terminal device from the core network device. For example, the updated network device selection assistance information of the terminal device may be specifically obtained through a path transfer response message or a first message sent by the core network device.
  • the handover request message sent by the source access network device to the target access network device includes the registration area of the terminal device. Information, so that the target access network device can determine whether the network slice selection auxiliary information supported by the terminal device in the handover request message is valid according to the registration area information, and improves communication efficiency.
  • FIG. 5 is a specific example of a communication method according to another embodiment of the present application.
  • the source access network device in FIG. 4 may be the source base station in FIG. 5, and the target access network device in FIG. 4 may be the target base station in FIG. 5.
  • the method of FIG. 5 includes:
  • the source base station sends a handover request message to the target base station.
  • the target base station receives the handover request message from the source base station.
  • the handover request message may include auxiliary information for network slice selection supported by the terminal device, such as allowed NSSAI.
  • the target base station may perform RRC connection reconfiguration on the terminal device according to the allowed NSSAI. For example, RRC measurement parameter configuration (such as measurement period, measurement threshold, measurement object (such as carrier frequency band, carrier frequency band priority, synchronization message block frequency band, synchronization message block measurement priority, channel state information reference signal carrier frequency), etc.).
  • the target base station may also perform admission control based on the network slice information according to the allowed NSSAI (for example, when congestion occurs in the slice of the allowed NSSAI, the handover request of the source base station is rejected).
  • the handover request message may also include current registered area information of the terminal device, for example, a TAI list.
  • the target base station can determine whether the allowed NSSAI is applicable to the target base station according to the registration area information.
  • the above handover request message may include a session list that the target base station needs to establish for the terminal and S-NSSAI corresponding to each session, and the session list will include all sessions currently being performed by the terminal. It also includes the QoS flow ID and corresponding QoS flow parameter information included in each session.
  • the target base station performs access control.
  • the target base station may perform access control based on the network slices supported by it, the received network slice supported by the terminal device to select auxiliary information, and the status of its own resource usage.
  • the target base station sends a handover request response message to the source base station, and accordingly, the source base station receives the handover request response message from the target base station.
  • the handover request response message may include a list of sessions received by the target base station and a list of rejected sessions. It also includes the list of QoS flows accepted in the sessions accepted by the target base station, as well as the list of rejected sessions and the reason for rejection.
  • a handover operation is performed between the source base station and the terminal device.
  • the source base station sends a handover command message to the terminal.
  • the handover command message includes bearer configuration information of the target base station.
  • the terminal device After receiving the handover command message, the terminal device can perform random access with the target base station, and send a handover confirmation message to the target base station after the random access process is completed.
  • the target base station sends a path switch request message to the core network device.
  • the path transfer request message includes an accepted session and a session that is not accepted by the target base station during the handover execution process, or a received session and a rejected session. It also includes the list of QoS flows accepted in the sessions accepted by the target base station, as well as the list of rejected sessions and the reason for rejection.
  • the core network device sends a path switch request response (path switch request message) message to the target base station.
  • the path transfer request response message may include network slice selection assistance information supported by the terminal device.
  • the path transfer request response message may include network slice selection assistance information supported by the updated terminal device. If the target base station and the source base station belong to the same registration area, the network slice selection auxiliary information supported by the terminal device is not updated.
  • the following step 507 may be further included.
  • the terminal device sends a registration request (registration request) message to the core network device, and the core network device sends a registration acceptance message to the terminal device through the target base station.
  • a registration request registration request
  • the core network device sends a registration acceptance message to the terminal device through the target base station.
  • the core network device may send N2 interface signaling to the access network device, and the N2 interface signaling includes the registration acceptance message and the updated terminal Auxiliary information for network slice selection supported by the device.
  • the access network device may obtain the updated network slice selection auxiliary information supported by the updated terminal device through the N2 interface signaling.
  • the registration request message and the registration reception information may be NAS layer information.
  • step 507 is not required.
  • step S504 in FIG. 5 may occur before step S505, or may occur after step S505, which is not limited in this embodiment of the present application.
  • FIG. 6 is a specific example of a communication method according to another embodiment of the present application.
  • FIG. 6 shows a specific execution process of step 507 in FIG. 5.
  • the method in FIG. 6 includes:
  • the terminal device sends a registration request message to the target base station, and accordingly, the target base station receives the registration request message from the terminal device.
  • the registration request message is a NAS layer message, that is, the target base station does not parse the registration request message.
  • the target base station sends the registration request message to the core network device.
  • the core network device receives the registration request message from the target base station.
  • the target base station may transparently transmit the registration request message.
  • the core network device sends a first message to the target base station.
  • the target base station receives the first message from the core network device, where the first message includes a registration acceptance message and a message supported by the terminal device.
  • Network slice selection auxiliary information is included in the core network device.
  • the first message may be an N2 interface message
  • the registration acceptance message may be NAS layer information. That is, the access network device can parse the first message, but cannot parse the registration acceptance message.
  • the access network device may obtain and parse the network slice selection auxiliary information supported by the terminal device according to the first message.
  • the target base station sends a second message to the terminal device, where the second message includes the registration acceptance message, and accordingly, the terminal device receives the second message from the target base station.
  • the second message may also include network slice selection assistance information supported by the terminal device, so that the terminal device obtains updated network slice selection assistance information supported by the terminal device.
  • the terminal device may receive the network slice selection assistance supported by the terminal device from the target access network device during the registration update process. Information, so that the terminal device can select auxiliary information according to the network slice and perform related communication, thereby improving communication efficiency.
  • FIG. 7 is a schematic flowchart of a communication method according to another embodiment of the present application.
  • the terminal device when the terminal device is in an inactive state, the terminal device moves from the second access network device to the first access network device, and in the process of the terminal device transitioning from the inactive state to the connected state, the first The access network device needs to obtain the context of the terminal device from the second access network device.
  • the terminal device context response message sent by the second access network device to the first access network device may include network slice selection assistance information supported by the terminal device, so that the first access network device selects assistance based on the network slice. Information to perform communication related to the terminal device.
  • the method of FIG. 7 includes:
  • the first access network device sends a terminal device context request message to the second access network device.
  • the second access network device receives the terminal terminal context from the first access network device.
  • a request message, the terminal device context request message is used to request a terminal device context, wherein the first access network device is an access network device in which the terminal device currently resides, and the second access network
  • the device is an access network device where the terminal device resided last time.
  • the first access network device may also be referred to as a new access network device or a new base station or a new serving base station.
  • the above-mentioned second access network device may also be referred to as an anchor access network device or an anchor base station or a base station that stayed last time.
  • the terminal device is switched from an inactive state to a connected state.
  • the terminal device moves from the coverage area of the second access network device to the coverage area of the first access network device in the inactive state, and moves from the inactive state when the first access network device provides services. Switch to connected state.
  • the above resident may also be referred to as a service, that is, the first access network device may refer to an access network device that provides services to the terminal device, and the second access network device refers to the last time that the device provided services to the terminal device. Access network equipment. In other words, the access network device that provided service to the terminal device for the last time.
  • the first access network device receives a terminal device context response message from the second access network device. Accordingly, the second access network device sends the first access network device to the first access network device. Acquiring a terminal context response message, the acquiring terminal device context response message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the terminal device context response message may further include a context of the terminal device.
  • the first access network device on which the terminal device currently resides acquires the terminal from the second access network device on which the terminal device last resided A device context response message, and the acquiring terminal device context response message includes network slice selection assistance information supported by the terminal device, so that the first access network device selects the assistance information according to the network slice, and performs communication with the terminal device Relevant communication, thereby improving communication efficiency.
  • the method of FIG. 7 further includes: the first access network device receives registration area information of the terminal device from the second access network device, and the registration area information is used to indicate the terminal device The corresponding tracking area.
  • the registration area information may also be carried in the terminal device context response message.
  • the first access network device on which the terminal device currently resides obtains the terminal from the second access network device on which the terminal device last resided.
  • the registration area information of the device so that the first access network device determines whether the network slice selection auxiliary information supported by the terminal device sent by the second access network device is valid according to the registration area information, and improves communication efficiency.
  • FIG. 8 is a specific example of a communication method according to another embodiment of the present application.
  • the first access network device in FIG. 7 may be the new serving base station in FIG. 8, and the second access network device in FIG. 7 may be the anchor base station in FIG. 8.
  • the terminal device in FIG. 8 moves from the anchor base station to the new serving base station in the inactive state.
  • the terminal device requests a transition from an inactive state to a connected state.
  • the new serving base station acquires network slice selection assistance information supported by the terminal device.
  • the method of FIG. 8 includes:
  • the terminal device performs random access with the new serving base station.
  • the terminal device sends an RRC Resume Request message to the new serving base station.
  • the RRC recovery request message may be used to indicate a reason for the recovery request, such as a periodic reminder area update request, an initial signaling request from a terminal, and the like.
  • the new serving base station sends a terminal device context request message to the anchor base station.
  • the anchor base station sends a terminal device context response message to the new serving base station.
  • the above-mentioned response message for obtaining the terminal device context may include network slice selection auxiliary information supported by the terminal device, that is, allowed NSSAI.
  • the new serving base station can perform RRC connection reconfiguration on the terminal device according to the allowed NSSAI. For example, RRC measurement parameter configuration, admission control based on network slice information, etc.
  • the first access network device on which the terminal device currently resides acquires the terminal from the second access network device on which the terminal device last resided A device context response message, and the acquiring terminal device context response message includes network slice selection assistance information supported by the terminal device, so that the first access network device selects the assistance information according to the network slice, and performs communication with the terminal device Related communication, thus improving communication efficiency.
  • FIG. 9 is a schematic flowchart of a communication method according to another embodiment of the present application. As shown in FIG. 9, the method in FIG. 9 includes:
  • the access network device receives a third message from the terminal device.
  • the terminal device sends the third message to the access network device.
  • the third message includes service request information, and the service request message.
  • the third message further includes at least one of the following: network slice selection assistance information supported by the terminal device, and single network slice selection assistance information (S-NSSAI) .
  • the network slice selection assistance information supported by the terminal device may be used to indicate a network slice supported by the terminal device, and the single network slice selection assistance information may be used to indicate a network slice that triggers the service request message.
  • the network slice selection assistance information supported by the terminal device may be a network slice (for example, requested NSSAI) requested by the terminal device.
  • the above service request message may be non-access stratum (NAS) information. That is, the access network device cannot parse the service request message, and the access network device is equivalent to transparently transmitting the service request message.
  • NAS non-access stratum
  • the third message may be an RRC layer message.
  • the third message may be an RRC establishment request message or an RRC establishment completion message.
  • the access network device may select auxiliary information according to a network slice supported by the terminal device, and perform communication related to the terminal device.
  • the access network device sends a fourth message to the core network device.
  • the core network device receives the fourth message from the access network device, and the fourth message includes the service request message.
  • the fourth message may be an N2 interface message.
  • the access network device sends a service request message to the core network device, which is equivalent to transparently transmitting the service request message to the core network device.
  • the access network device receives a third message sent by the terminal device, where the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • S-NSSAI single network slice selection assistance information
  • the access network device may perform control and communication related to the service request message according to the single network slice selection assistance information, for example, when the service request message is triggered.
  • the access network device forwards the service request message to the core network device.
  • the access network device does not send a second service request message to the core network device.
  • the access network device releases the RRC connection of the terminal device, for example, sends an RRC connection release message to the terminal device.
  • the access network device indicates an RRC connection release reason, such as tracking area update.
  • the core network device may send a notification message to the access network device to indicate which network slices are congested.
  • the AMF may include S-NSSAI in the N2 interface control message sent to the 5G-AN node to indicate the congestion of the network slice at the core network.
  • FIG. 10 is a specific example of a communication method according to an embodiment of the present application.
  • a terminal device in an idle state moves from a base station where it last resided to a new base station. And the terminal device requests a transition from the idle state to the connected state.
  • the terminal device may send the network slice selection support information supported by the terminal device to the access network device.
  • the method in FIG. 10 includes:
  • the terminal device sends a third message to the access network device, where the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to a connected state.
  • the third message may also include requested NSSAI.
  • the requested NSSAI may include network slice selection assistance information (for example, allowed NSSAI) and / or single network slice selection assistance information (S-NSSAI) supported by the terminal device.
  • the third message may further include network slice selection assistance information (Requested NSSAI) requested by the terminal.
  • the terminal device when the terminal device is in an idle state, if there is uplink data to be sent, the terminal device may trigger the generation of the service request message.
  • the allowed NSSAI may refer to all network slices supported by the terminal device.
  • the S-NSSAI may be used to indicate a network slice that triggers the service request message.
  • the service request message may be NAS information
  • the third message may be an RRC message.
  • the third message may carry the foregoing finally allowed NSSAI and / or S-NSSAI.
  • the third message may be, for example, an RRC establishment request message or an RRC establishment completion message.
  • the access network device sends a fourth message to the core network device, where the fourth message includes the service request message.
  • the access network device may receive information from the core network device about which network slices are congested. Based on the allowed NSSAI, the access network device can perform the following actions: For example, when congestion occurs on the network slice that triggered the service request message, the access network device will not send a fourth message to the core network device.
  • the access network device may release the RRC connection of the terminal device, for example, send an RRC connection release message to the terminal device.
  • the access network device indicates the reason for the RRC connection release, such as tracking area update. Otherwise, the access network device sends a fourth message to the core network device.
  • the access network device may also trigger the terminal device to perform cell reselection and / or registration update.
  • S1003 The core network sends a response message to the access network device.
  • the access network device sends an RRC connection reconfiguration message to the UE.
  • the terminal device enters the connected state and can perform normal UL and DL data transmission processes.
  • the access network device receives a third message sent by the terminal device, where the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • the third message includes a service request message and also includes the terminal device Supported network slice selection assistance information and / or single network slice selection assistance information (S-NSSAI) that triggers the service request message, so that the access network device can obtain the network slice selection assistance information supported by the terminal device according to the third message And / or a single network slice to select auxiliary information for related control or communication.
  • S-NSSAI single network slice selection assistance information
  • FIG. 11 is a schematic flowchart of a paging method according to an embodiment of the present application. As shown in Figure 11, the method includes:
  • the access network device receives a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: information on network slices, QFI, 5QI, allocation and preemption priority Allocation and retention priority (ARP) and DNN.
  • first information includes at least one of the following: information on network slices, QFI, 5QI, allocation and preemption priority Allocation and retention priority (ARP) and DNN.
  • the first information may be used to indicate a factor that triggers the first paging message.
  • the first paging message may be triggered by a network slice.
  • the information of the network slice may include at least one of the following: single network slice selection assistance information (S-NSSAI) that triggers the first paging message, and network slice selection assistance information supported by the terminal device. That is, the first paging message is triggered by the S-NSSAI.
  • the network slice selection assistance information supported by the terminal device may refer to all S-NSSAIs supported by the terminal device.
  • the first information may indicate which QFI or 5QI triggered the first paging message, or the first paging message may indicate which DNN triggered the first paging message.
  • the first paging message may indicate which ARP triggered the first paging message.
  • the access network device After receiving the first paging message, the access network device sends a second paging message to a terminal device. Accordingly, the terminal device receives the second paging message.
  • the access network device may send the second paging message according to the first paging message. For example, the access network device may determine a first paging message as the second paging message, and send the second paging message. Or the access network device may delete the first information in the first paging message to obtain a second paging message and send the second paging message.
  • the paging message received by the access network device may include first information, and the first information may include information about network slices, QFI, 5QI, ARP, or DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the access network device determines a policy for sending a second paging message, such as a paging priority, a number of paging times, and a paging area (including one or more cell lists) according to the network slice information.
  • a policy for sending a second paging message such as a paging priority, a number of paging times, and a paging area (including one or more cell lists) according to the network slice information.
  • the access network device preferentially sends a second paging message for a high-reliability and low-latency network slice, or sends a second paging message in a larger cell area, or sends a plurality of second paging messages. Message.
  • the access network device determines, according to the QFI or 5QI information, a policy for sending a second paging message, such as a paging priority, a number of paging times, and a paging area (including one or more cell lists).
  • a policy for sending a second paging message such as a paging priority, a number of paging times, and a paging area (including one or more cell lists).
  • the access network device preferentially sends a second paging message for a high-priority QFI or 5QI, or sends a second paging message in a larger cell area, or sends a plurality of second paging messages. Message.
  • the access network device determines, according to the ARP information, that it sends a second paging message measurement, such as the paging priority, the number of paging times, and the paging area (including one or more cell lists).
  • a second paging message measurement such as the paging priority, the number of paging times, and the paging area (including one or more cell lists).
  • the access network device preferentially sends a second paging message for a high-priority ARP, or sends a second paging message in a larger cell area, or sends the second paging message multiple times.
  • the second paging message sent by the access network device to the terminal device may include the first information or may not include the first information.
  • the terminal device may be in an idle state, and the receiving the first paging message by the access network device includes: the access network device receiving the first paging message from a core network device, and accordingly, Sending, by the core network device, the first paging message to the access network device.
  • the first paging message is initiated by the core network device.
  • the core network device finds that data from the terminal device arrives, it will trigger the core network to start paging (CN initiated).
  • the first paging message received by the access network device from the core network device may include first information, and the first information may include one or more of the following: Network slice information, QFI, 5QI, ARP, and DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the S-NSSAI that triggers the paging message may be carried in the paging message used for RAN paging and RAN congestion control. Therefore, it should be possible to allow the RAN to have its dedicated slice processing based on service-level agreement (SLA) requirements that take into account network slices. For example, the access network device may consider paging priorities at the network slice level, areas supported by the network slice, and the like. Because the paging request may be triggered by a specific network slice, the corresponding S-NSSAI of the AMF transmission triggering paging message will be more valuable.
  • SLA service-level agreement
  • NSSAI Another potential use of NSSAI is for RAN overload control. For example, when the network slice in the paging message is overloaded, the access network device may not broadcast the RRC paging message. It is more advantageous to transmit the S-NSSAI that triggers the page than to transmit all the S-NSSAIs supported by the terminal equipment.
  • the access network device sending a second paging message to a terminal device includes: when the wireless access network is not congested, the access network device sends the second paging message to the terminal device. Call message; the method further comprises: in a situation where the radio access network is congested, the access network device does not send the second paging message, and sends paging failure indication information to the core network device to Indicates that the paging has failed.
  • the access network device may determine whether to send a second paging message according to the congestion situation of the wireless access network, thereby improving communication efficiency.
  • the access network device may determine the priority of the first paging message according to the first information. For example, different network slices correspond to different priorities, and the access network device may A message determines the priority of the network slice supported by the terminal device, or the priority of the network slice that triggers the first information, and determines the priority of the first paging message according to the priority of the network slice.
  • the access network device may send a paging message with a higher priority according to the priority corresponding to each paging message. Or allocate resources for the paging messages with higher priority first.
  • the access network device may determine the priority of the first paging message according to the first information, and perform paging according to the priority of the first paging message, thereby improving communication efficiency.
  • the terminal device may be in an inactive state.
  • the access network device is a first access network device
  • the access network device receives the first paging message
  • the first access network device includes: The network access device receives the first paging message from the second access network device, and accordingly, the second access network device sends the first paging message to the first access network device, where all the The first access network device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • the first paging message is initiated by the second access network device where the terminal device last resided.
  • the core network device finds that data of the terminal device arrives, it sends the first paging message to the first access network device.
  • the second access network device After receiving the terminal device context request message, the second access network device sends the downlink data to the first access network device.
  • the first access network device on which the terminal device currently resides receives the first page received from the second access network device on which the terminal device resided last time.
  • the message may include first information, and the first information may include at least one of the following: information on network slices, QFI, 5QI, ARP, and DNN.
  • the access network device may perform related control or communication according to the first information to improve communication efficiency.
  • the first access network device sends the second paging message based on the first information.
  • the sending, by the first access network device, a second paging message to the terminal device includes: when the wireless access network is not congested, the first access network device sends the second paging message to the terminal device.
  • the device sends paging failure indication information to indicate that the paging fails.
  • the first access network device may determine whether to send a second paging message according to the congestion situation of the wireless access network, thereby improving communication efficiency.
  • the first access network device may determine the priority of the first paging message according to the first information. For example, different network slices correspond to different priorities, and the first access network The device may determine the priority of the network slice supported by the terminal device according to the first information, or trigger the priority of the network slice of the first information, and determine the priority of the first paging message according to the priority of the network slice. level.
  • the first access network device may send a paging message with a higher priority according to the priority corresponding to each paging message. Or allocate resources for the paging messages with higher priority first.
  • the first access network device may determine the priority of the first paging message according to the first information, and perform paging according to the priority of the first paging message, thereby improving communication efficiency.
  • the access network equipment adopts a CU-DU separated architecture.
  • the CU for the terminal device in the idle state, when the CU receives the first paging message sent by the core network device, the CU then sends the second paging message to the DU.
  • the DU after receiving the second paging message sent by the CU, the DU sends a third paging message to the terminal device.
  • the first paging message may carry the first information
  • the second paging message and the third paging message may also carry the first information.
  • the CU and the DU can perform communication or paging related to the terminal device according to the first information, which is similar to the content in the foregoing, and is not described again.
  • the CU when the CU receives the downlink data sent by the source access network device, it can trigger paging.
  • the CU sends a paging message to the DU.
  • the paging message may also carry the foregoing first information.
  • FIG. 12 is a specific example diagram of a paging method according to an embodiment of the present application.
  • the terminal device in FIG. 12 is in an idle state. That is, paging is triggered by the core network equipment.
  • the core network device finds downlink data corresponding to the terminal device, it sends a paging message to the access network device.
  • the method of FIG. 12 includes:
  • the core network device sends a first paging message to the access network device.
  • the access network device receives the first paging message from the core network device, and the first paging message includes first information.
  • the first paging message may be N2 interface signaling.
  • the first information may carry at least one of the following messages: one or more S-NSSAI (s) to indicate which / those S-NSSAI triggered the paging message; the S-NSSAI supported by the terminal device; QFI / 5QI, which indicates the paging message triggered by which QFI / 5QI; DNN or DNN index to indicate which DNN's QFI / 5QI triggered paging message; the order that triggered the first paging message Network slice selection assistance information (S-NSSAI) and / or network slice selection assistance information supported by the terminal device; ARP to indicate a paging message triggered by ARP.
  • S-NSSAI Network slice selection assistance information
  • the access network device sends a second paging message to the terminal device.
  • the terminal device receives the second paging message.
  • the second paging message may include the first information or may not include the first information.
  • the access network device may perform the following operations based on the received first paging message:
  • the second paging message will not be sent, and a failure message will be sent back to the core network device.
  • the access network device carries the first information in a second paging message, and broadcasts the second paging message to the terminal device.
  • the terminal device may instruct the terminal device to perform resource division according to the first information.
  • the resource may be, for example, a random access channel (RACH) resource division, or an RRC connection establishment request indicating a connection establishment cause value, for example, indicating a network slice identifier, a 5QI / QFI identifier, an ARP identifier, a DNN identifier, or Its mapped value.
  • RACH random access channel
  • FIG. 13 is a specific example diagram of a paging method according to an embodiment of the present application.
  • the terminal device in FIG. 13 is in an inactive state. That is, the paging is triggered by the access network device where the terminal device resided last time.
  • the core network device finds the downlink data corresponding to the terminal device, it sends the downlink data to the second access network device where the terminal device last resided.
  • the second access network device After receiving the downlink data, the second access network device sends the downlink data to the terminal.
  • the first access network device where the device currently resides sends a paging message.
  • the paging method includes:
  • the second access network device sends a first paging message to the first access network device. Accordingly, the first access network device receives the first paging message from the second access network device.
  • the call message includes first information.
  • the first access network device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • the first paging message may be N2 interface signaling.
  • the first information may carry at least one of the following messages: one or more S-NSSAI (s) to indicate which / those S-NSSAI triggered the paging message; the S-NSSAI supported by the terminal device; QFI / 5QI, which indicates the paging message triggered by which QFI / 5QI; DNN or DNN index to indicate which DNN's QFI / 5QI triggered paging message; the order that triggered the first paging message Network slice selection assistance information (S-NSSAI) and / or network slice selection assistance information supported by the terminal device.
  • ARP indication indicating that the paging message is triggered by ARP.
  • the first access network device sends a second paging message to the terminal device.
  • the terminal device receives the second paging message.
  • the second paging message may include the first information or may not include the first information.
  • the first access network device may perform the following operations based on the received first paging message:
  • the second paging message will not be sent, and a failure message will be sent back to the second access network device;
  • the access network device carries the first information in a second paging message, and broadcasts the second paging message to the terminal device.
  • the terminal device may instruct the terminal device to perform resource division according to the first information.
  • the resource may be, for example, a random access channel (RACH) resource division, or an RRC connection establishment request indicating a connection establishment cause value, for example, indicating a network slice identifier, a 5QI / QFI identifier, an ARP identifier, a DNN identifier, Or its mapped value.
  • RACH random access channel
  • FIG. 14 is a specific example diagram of a paging method according to an embodiment of the present application.
  • the access network device in FIG. 14 has a CU-DU separated architecture.
  • the method of FIG. 14 includes:
  • the CU determines a first paging message, where the first paging message includes first information.
  • the first paging message may be sent by the core network device.
  • the first paging message may be N2 interface signaling.
  • the terminal device may be generated by the CU after receiving the downlink data of the terminal device. That is, it is assumed that a terminal device in an inactive state moves from a first DU to a second DU under the same CU. Then the CU generates a first paging message and sends it to the second DU.
  • the first information may carry at least one of the following messages: one or more S-NSSAI (s) to indicate which / those S-NSSAI triggered the paging message; S-NSSAI; QFI / 5QI, which indicates which paging message triggered by QFI / 5QI; DNN or DNN index to indicate which DNN's paging message triggered by QFI / 5QI; triggering the first search Single network slice selection assistance information (S-NSSAI) of the call message and / or network slice selection assistance information supported by the terminal device; ARP to indicate that the paging message is triggered by ARP.
  • S-NSSAI Single network slice selection assistance information
  • the CU sends a second paging message to the DU. Accordingly, the DU receives the second paging message from the CU.
  • the second paging message may include the first information or may not include the first information.
  • the DU may also send a third paging message to the terminal device, and the third paging message may also include the first information.
  • FIG. 15 is a schematic block diagram of an access network device 1500 according to an embodiment of the present application. It should be understood that the access network device 1500 can perform various steps performed by the access network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the access network device may be, for example, the access network device, the target access network device, the first access network device, or the second access network device described above.
  • the access network device 1500 includes a receiving unit 1510 and a sending unit 1520.
  • the receiving unit 1510 is configured to receive a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: information about network slices and quality of service flow identifiers. service flow identifier, QoS flow ID, QFI), 5th generation communication quality of service identifier (5G QoS ID, 5QI) 5QI, data network name (DNN), allocation and competition Priority (Allocation, Retention, Priority, ARP); the sending unit 1520 is configured to send a second paging message to a terminal device after receiving the first paging message.
  • service flow identifier QoS flow ID, QFI
  • 5th generation communication quality of service identifier 5G QoS ID, 5QI
  • DNN data network name
  • Priority Allocation, Retention, Priority, ARP
  • the access network device 1500 may be the first access network device, and the sending unit 1520 is configured to send a terminal device context request message to a second access network device, where the terminal device context request message is used for Requesting the context of a terminal device, wherein the first access network device is an access network device in which the terminal device currently resides, and the second access network device is a connection in which the terminal device last resided A network access device; the receiving unit 1510 is configured to receive a terminal device context response message from the second access network device, where the terminal terminal context response message includes network slice selection assistance information supported by the terminal device, and The network slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the access network device 1500 may be the second access network device described above, and the receiving unit 1510 is configured to receive a terminal device context request message from the first access network device, and the terminal device context request message is used for Requesting the context of a terminal device, wherein the first access network device is an access network device in which the terminal device currently resides, and the second access network device is a connection in which the terminal device last resided A network access device; the sending unit 1520 is configured to send a terminal device context response message to the first access network device, where the terminal terminal context response message includes network slice selection auxiliary information supported by the terminal device, and The network slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the receiving unit 1510 is configured to receive a third message from a terminal device, where the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to a connected state.
  • the three messages further include at least one of the following: network slice selection assistance information and single network slice selection assistance information supported by the terminal device; and the sending unit 1520 is configured to send a fourth message to the core network device, where the fourth message includes The service request message.
  • FIG. 16 is a schematic block diagram of a core network device 1600 according to an embodiment of the present application. It should be understood that the core network device 1600 can perform each step performed by the core network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the core network device 1600 includes: a receiving unit 1610 and a sending unit 1620,
  • the receiving unit 1610 is configured to receive a path transfer request message from a target access network device, and the path transfer request message is used to request a terminal device to be switched from the source access network device to the target access network device; the sending unit 1620 is configured to Send a path transfer response message to the target access network device, where the path transfer response message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the terminal Network slices supported by the device.
  • the receiving unit 1610 is configured to receive a registration request message from a target access network device, and the registration request message is used to request to update a registration area of a terminal device; and the sending unit 1620 is configured to send the target access network device to the target access network device.
  • a first message is sent, the first message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • FIG. 17 is a schematic block diagram of a terminal device 1700 according to an embodiment of the present application. It should be understood that the terminal device 1700 can perform each step performed by the terminal device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the terminal device 1700 includes: a sending unit 1710 and a receiving unit 1720,
  • the sending unit 1710 is configured to send a registration request message to an access network device, and the registration request message is used to request to update a registration area of the terminal device; the receiving unit 1720 is configured to receive a first request from the access network device. Two messages, the second message includes the registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • FIG. 18 is a schematic block diagram of an access network device 1800 according to another embodiment of the present application. It should be understood that the access network device 1800 can perform various steps performed by the access network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the access network device may be, for example, the source access network device or the second access network device in the foregoing.
  • the access network device 1800 includes a processing unit 1810 and a communication unit 1820.
  • the access network device 1800 may be a target access network device.
  • the communication unit 1820 is configured to receive a handover request message sent by a source access network device, and the handover request message is used to request the terminal device to access from the source.
  • the network device switches to the target access network device.
  • the processing unit 1810 is configured to obtain network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device.
  • the access network device 1800 may be a source access network device.
  • the processing unit 1810 is configured to generate a handover request message, and the handover request message is used to request a terminal device to switch from the source access network device to a target access network device.
  • the handover request message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device;
  • the communication unit 1820 is configured to: Sending the handover request message to the target access network device.
  • the access network device 1800 may be a second access network device, and the processing unit 1810 is configured to generate a first paging message, where the first paging message corresponds to a terminal device, and the first paging message includes a first Information, the first information includes at least one of the following: information on network slices, QFI, 5QI, ARP, DNN; a communication unit 1820 is configured to send the first paging message to a first access network device, where all The first access network device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • FIG. 19 is a schematic block diagram of a core network device 1900 according to another embodiment of the present application. It should be understood that the core network device 1900 can perform each step performed by the core network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the core network device 1900 includes a processing unit 1910 and a communication unit 1920.
  • the processing unit 1910 is configured to generate a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: information on network slices, QFI, 5QI, ARP, DNN
  • the communication unit 1920 is configured to send the first paging message to an access network device.
  • FIG. 20 is a schematic block diagram of a terminal device 2000 according to an embodiment of the present application. It should be understood that the terminal device 2000 can perform each step performed by the terminal device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the terminal device 2000 includes: a processing unit 2010 and a communication unit 2020,
  • the processing unit 2010 is configured to generate a third message, where the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to a connected state.
  • the third message further includes the following: At least one of: network slice selection assistance information and single network slice selection assistance information supported by the terminal device; the communication unit 2020 is configured to send the third message to an access network device.
  • FIG. 21 is a schematic block diagram of an access network device 2100 according to an embodiment of the present application. It should be understood that the access network device 2100 can perform each step performed by the access network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the access network device may be, for example, the access network device, the target access network device, the source access network device, the first access network device, or the second access network device in the foregoing.
  • the access network device 2100 includes:
  • a memory 2110 for storing a program
  • Communication interface 2120 for communicating with other devices
  • the processor 2130 is configured to execute a program in the memory 2110. When the program is executed,
  • the access network device 2100 may be a target access network device, and the processor 2130 is configured to receive, through the communication interface 2120, a handover request message sent by a source access network device, and the handover request message is used to request the The terminal device switches from the source access network device to the target access network device. And obtaining network slice selection assistance information supported by the terminal device through the communication interface 2120, the network slice selection assistance information supported by the terminal device is used to indicate the network slice supported by the terminal device.
  • the processor 2130 is configured to receive a first paging message through the communication interface 2120, where the first paging message includes first information, and the first information includes at least one of the following: information of a network slice Quality of service flow identifier (QoS, flow ID, QFI), 5th generation mobile communication technology service quality identifier (5th, quality service of service identifier, 5G, QoS ID, 5QI) 5QI, data network name (data network) name, DNN); and for receiving a second paging message to a terminal device through the communication interface 2120 after receiving the first paging message.
  • QoS network slice Quality of service flow identifier
  • 5th generation mobile communication technology service quality identifier 5th, quality service of service identifier, 5G, QoS ID, 5QI
  • the access network device 2100 may be the above-mentioned first access network device, and the processor 2130 is configured to send a terminal device context request message to the second access network device through the communication interface 2120, and the acquiring The terminal device context request message is used to request the context of the terminal device, wherein the first access network device is an access network device in which the terminal device currently resides, and the second access network device is the terminal device.
  • the access network device 2100 may be the second access network device described above, and the processor 2130 is configured to receive a terminal device context request message from the first access network device through the communication interface 2120, and the acquiring The terminal device context request message is used to request the context of the terminal device, wherein the first access network device is an access network device in which the terminal device currently resides, and the second access network device is the terminal device.
  • the processor 2130 is configured to receive a third message from a terminal device through the communication interface 2120, where the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to In connection state, the third message further includes at least one of the following: network slice selection assistance information supported by the terminal device, single network slice selection assistance information; and a fourth message for sending to the core network device through the communication interface 2120 Message, the fourth message includes the service request message.
  • the access network device 2100 may be a source access network device, and the processor 2130 is configured to generate a handover request message, and the handover request message is used to request a terminal device to switch from the source access network device to a target An access network device, the handover request message includes network slice selection assistance information supported by the terminal device, and the network slice selection assistance information supported by the terminal device is used to indicate a network slice supported by the terminal device; and Sending the handover request message to the target access network device through the communication interface 2120.
  • the access network device 2100 may be a second access network device, and the processor 2130 is configured to generate a first paging message, where the first paging message corresponds to a terminal device, and the first paging message is Including first information, the first information including at least one of the following: information of a network slice, QFI, 5QI, ARP, DNN; and for sending the first to a first access network device through the communication interface 2120
  • the paging message wherein the first access network device is an access network device where the terminal device currently resides, and the second access network device is an access network device where the terminal device last resided.
  • the access network device shown in FIG. 21 may be a chip or a circuit, or another type of access network device.
  • a chip or circuit can be provided in the access network device.
  • the above-mentioned communication interface 2120 may also be interchanged with a transceiver.
  • the transceiver includes a receiver and a transmitter.
  • the access network device 2100 may further include a bus system.
  • the processor 2130, the memory 2110, the receiver, and the transmitter are connected through a bus system.
  • the processor 2130 is configured to execute instructions stored in the memory 2110 to control the receiver to receive signals and control the transmitter to send signals to complete the communication of this application.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the memory 2110 may be integrated in the processor 2130, or may be provided separately from the processor 2130.
  • the functions of the receiver and the transmitter may be considered to be implemented by a transceiver circuit or a transceiver chip.
  • the processor 2130 may be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.
  • a manner of using a general-purpose computer may be considered to implement the terminal device provided in the embodiment of the present application.
  • the program code for the functions of the processor 2130, the receiver and the transmitter is to be stored in the memory, and the general-purpose processor implements the functions of the processor 2130, the receiver, and the transmitter by executing the codes in the memory.
  • FIG. 22 is a schematic block diagram of a core network device 2200 according to an embodiment of the present application. It should be understood that the core network device 2200 can perform each step performed by the core network device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the core network equipment 2200 includes:
  • a memory 2210 for storing a program
  • a communication interface 2220 for communicating with other devices
  • the processor 2230 is configured to execute a program in the memory 2210. When the program is executed,
  • the processor 2230 is configured to receive a path transfer request message from a target access network device through the communication interface 2220, and the path transfer request message is used to request a terminal device to be switched from a source access network device to the target access Network device; and for sending a path transfer response message to the target access network device through the communication interface 2220, the path transfer response message includes network slice selection assistance information supported by the terminal device, and the terminal device supports The network slice selection assistance information is used to indicate a network slice supported by the terminal device.
  • the processor 2230 is configured to receive a registration request message from a target access network device through the communication interface 2220, the registration request message is used to request to update a registration area of a terminal device, and is configured to use the communication interface 2220 Sending a first message to the target access network device, where the first message includes a registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • the processor 2230 is configured to generate a first paging message, where the first paging message includes first information, and the first information includes at least one of the following: information on network slices, QFI, 5QI, ARP , DNN; and for sending the first paging message to an access network device through the communication interface 2220.
  • the core network device shown in FIG. 22 may be a chip or a circuit, or another type of core network device.
  • a chip or circuit can be provided in the core network device.
  • the communication interface 2220 may be interchanged with a transceiver.
  • the transceiver includes a receiver and a transmitter.
  • the terminal device 2200 may further include a bus system.
  • the processor 2230, the memory 2210, the receiver, and the transmitter are connected through a bus system.
  • the processor 2230 is configured to execute instructions stored in the memory 2210 to control the receiver to receive signals and control the transmitter to send signals to complete the communication of this application.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the memory 2210 may be integrated in the processor 2230 or may be separately provided from the processor 2230.
  • the functions of the receiver and the transmitter may be considered to be implemented by a transceiver circuit or a transceiver chip.
  • the processor 2230 may be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.
  • a manner of using a general-purpose computer may be considered to implement the core network device provided in the embodiment of the present application.
  • the program code that is about to implement the functions of the processor 2230, the receiver and the transmitter is stored in the memory, and the general-purpose processor implements the functions of the processor 2230, the receiver, and the transmitter by executing the code in the memory.
  • FIG. 23 is a schematic block diagram of a terminal device 2300 according to an embodiment of the present application. It should be understood that the terminal device 2300 can perform each step performed by the first terminal device in the methods in FIG. 1 to FIG. 14. To avoid repetition, details are not described herein.
  • the terminal device 2300 includes:
  • a memory 2310 for storing a program
  • Communication interface 2320 for communicating with other devices
  • the processor 2330 is configured to execute a program in the memory 2310. When the program is executed,
  • the processor 2330 is configured to send a registration request message to an access network device through the communication interface 2320, and the registration request message is used to request to update a registration area of the terminal device; and from the communication interface 2320, The access network device receives a second message, where the second message includes the registration acceptance message and network slice selection assistance information supported by the terminal device, and the registration acceptance message is used to respond to the registration request message.
  • the processor 2330 is configured to generate a third message, where the third message includes a service request message, and the service request message is used to request the terminal device to transition from an idle state to a connected state, and the third message further It includes at least one of the following: network slice selection assistance information and single network slice selection assistance information supported by the terminal device; and sending the third message to an access network device through the communication interface 2320.
  • the terminal device shown in FIG. 23 may be a chip or a circuit, or another type of terminal device.
  • a chip or circuit can be provided in the terminal device.
  • the communication interface 2320 may be interchanged with a transceiver.
  • the transceiver includes a receiver and a transmitter.
  • the terminal device 2300 may further include a bus system.
  • the processor 2330, the memory 2310, the receiver, and the transmitter are connected through a bus system.
  • the processor 2330 is configured to execute instructions stored in the memory 2310 to control the receiver to receive signals and control the transmitter to send signals to complete the communication of this application.
  • the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.
  • the memory 2310 may be integrated in the processor 2330, or may be provided separately from the processor 2330.
  • the functions of the receiver and the transmitter may be considered to be implemented by a transceiver circuit or a transceiver chip.
  • the processor 2330 may be implemented by a dedicated processing chip, a processing circuit, a processor, or a general-purpose chip.
  • a manner of using a general-purpose computer may be considered to implement the terminal device provided in the embodiment of the present application.
  • the program code for the functions of the processor 2330, the receiver and the transmitter is to be stored in the memory, and the general-purpose processor implements the functions of the processor 2330, the receiver, and the transmitter by executing the codes in the memory.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or 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, which may be 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, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disks, mobile hard disks, read-only memories (ROM), random access memories (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，能够提高通信效率。该通信方法包括：目标接入网设备接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求所述终端设备从所述源接入网设备切换至所述目标接入网设备；所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。

Description

通信方法、寻呼方法、设备和系统
本申请要求于2018年6月22日提交中国专利局、申请号为201810654319.4、申请名称为“通信方法、寻呼方法、设备和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及通信领域，尤其涉及一种通信方法、寻呼方法、设备和系统。
背景技术
网络切片作为5G的一项关键技术，在3GPP和其他各种国际标准化组织得到了广泛的重视和研究。其可以满足运营商对于各种工业、垂直市场和各种虚拟运营业务的定制化需求。网络切片可以包括能够满足业务需求的所有资源。例如，网络切片可以包括核心网控制和用户面网络功能及资源、以及空口接入网络等。
但是在未来通信系统中，如何基于网络切片进行相关通信和控制，还存在许多亟待解决的问题。
发明内容
本申请提供一种通信方法、寻呼方法、设备和系统，能够提高通信效率。
第一方面，提供了一种通信方法，包括：目标接入网设备接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备；所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，还包括：所述目标接入网设备向所述核心网设备发送路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备；所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括：所述目标接入网设备从所述核心网设备接收路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以通过路径转移请求消息从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，还包括：所述目标接入网设备向核心网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括：所述目标接入网设备从核心网设备接收第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，还包括：在发送所述注册请求消息之前，所述目标接入网设备从所述终端设备接收注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；在接收所述第一消息之后，所述目标接入网设备向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中向终端设备发送终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备支持的网络切片选择辅助信息，以便于所述目标接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备的注册区域信息，以便于所述目标接入网设备根据该注册区域信息，判断切换请求消息中的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第二方面，提供了一种通信方法，包括：核心网设备从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；所述核心网设备向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，核心网设备可以通过路径转移请求消息向接入网设备发送终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
第三方面，提供了一种通信方法，包括：核心网设备从目标接入网设备接收注册请求 消息，所述注册请求消息用于请求更新终端设备的注册区域；核心网设备向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，核心网设备可以在注册更新过程中向目标接入网设备发送终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该网络切片选择辅助信息，进行与终端设备相关的通信，提高了通信效率。
第四方面，提供了一种通信方法，包括：终端设备向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；所述终端设备从所述接入网设备接收第二消息，所述第二消息中包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，终端设备可以在注册更新过程中从目标接入网设备接收终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
第五方面，提供了一种通信方法，包括：源接入网设备生成切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备，所述切换请求消息中包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片；所述源接入网设备向所述目标接入网设备发送所述切换请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备支持的网络切片选择辅助信息，以便于所述目标接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备的注册区域信息，以便于所述目标接入网设备根据该注册区域信息，判断切换请求消息中的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第六方面，提供了一种寻呼方法，包括：接入网设备接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、服务质量流标识(quality of service flow identifier,QoS flow ID,QFI)、第五代移动通信技术服务质量标识(5th generation quality of service identifier,5G QoS ID,5QI)5QI、分配和竞争优先级(Allocation and Retention Priority，ARP)、数据网络名称(data network name,DNN)；所述接入网设备在接收所述第一寻呼消息之后，向终端设备发送第二寻呼消息。
在本申请实施例中，接入网设备接收的寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
在一种可能的实现方式中，所述第二寻呼消息中包括所述第一信息。
在一种可能的实现方式中，所述终端设备处于空闲态，所述接入网设备接收第一寻呼消息，包括：所述接入网设备从核心网设备接收所述第一寻呼消息。
在本申请实施例中，在终端设备处于空闲态的情况下，接入网设备从核心网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
在一种可能的实现方式中，所述终端设备处于非激活态，所述接入网设备为第一接入网设备，所述接入网设备接收第一寻呼消息，包括：所述第一接入网设备从第二接入网设备接收所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
在本申请实施例中，在终端设备处于非激活态的情况下，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第七方面，提供了一种寻呼方法，包括：核心网设备生成第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息；QFI；5QI；DNN；核心网设备向接入网设备发送所述第一寻呼消息。
在本申请实施例中，核心网设备向接入网设备发送的的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第八方面，提供了一种寻呼方法，包括：第二接入网设备生成第一寻呼消息，所述第一寻呼消息对应于终端设备，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；所述第二接入网设备向第一接入网设备发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
在本申请实施例中，终端设备上次驻留的第二接入网设备向当前驻留的第一接入网设备发送的的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第九方面，提供了一种通信方法，包括：第一接入网设备向第二接入网设备发送获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；所述第一接入网设备从所述第二接入网设备接收获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备获取终端设备上下文响应消息，该获取终端设备上下文响应消息中包括所述终端设备支持的网络切片选择辅助信息， 以便于所述第一接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的的通信，从而提高通信效率。
在一种可能的实现方式中，所述终端设备处于非激活态。
在一种可能的实现方式中，还包括：所述第一接入网设备从所述第二接入网设备接收所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备获取终端设备的注册区域信息，以便于所述第一接入网设备根据该注册区域信息，判断第二接入网设备发送的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第十方面，提供了一种通信方法，包括：第二接入网设备从第一接入网设备接收获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；所述第二接入网设备向所述第一接入网设备发送获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备上次驻留的第二接入网设备向终端设备当前驻留的第一接入网设备发送终端设备上下文响应消息，该获取终端设备上下文响应消息中包括所述终端设备支持的网络切片选择辅助信息，以便于所述第一接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的的通信，从而提高通信效率。
在一种可能的实现方式中，所述终端设备处于非激活态。
在一种可能的实现方式中，还包括：所述第二接入网设备向所述第一接入网设备发送所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备上次驻留的第二接入网设备向终端设备当前驻留的第一接入网设备发送终端设备的注册区域信息，以便于所述第一接入网设备根据该注册区域信息，判断第二接入网设备发送的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第十一方面，提供了一种通信方法，包括：接入网设备从终端设备接收第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；所述接入网设备向核心网设备发送第四消息，所述第四消息包括所述服务请求消息。
在本申请实施例中，在终端设备从空闲态转换为连接态的过程中，接入网设备接收终端设备发送的第三消息，该第三消息中包括服务请求消息，还包括所述终端设备支持的网络切片选择辅助信息和/或触发该服务请求消息的单网络切片选择辅助信息(S-NSSAI)，以便于接入网设备根据第三消息，获取上述终端设备支持的网络切片选择辅助信息和/或单网络切片选择辅助信息，以进行相关的控制或通信。
在一种可能的实现方式中，第三消息为无线资源控制(radio resource control,RRC) 建立请求消息或RRC建立完成消息。
第十二方面，提供了一种通信方法，包括：终端设备生成第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；所述终端设备向接入网设备发送所述第三消息。
在一种可能的实现方式中，第三消息为RRC建立请求消息或RRC建立完成消息。
第十三方面，提供了一种接入网设备，该接入网设备具有实现上述方法实施例中的接入网设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。该接入网设备例如可以包括上述接入网设备、目标接入网设备、源接入网设备、第一接入网设备、第二接入网设备等。
第十四方面，提供了一种核心网设备，该核心网设备具有实现上述方法实施例中的核心网设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第十五方面，提供了一种终端设备，该终端设备具有实现上述方法实施例中的终端设备的功能。这些功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元。
第十六方面，提供了一种通信系统，该通信系统包括上述第十三方面所述的接入网设备和第十四方面所述的核心网设备，或者，该通信系统包括上述十三方面所述的接入网设备、第十四方面所述的核心网设备以及第十五方面所述的终端设备。
第十七方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的接入网设备，或者为设置在接入网设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述方法实施例中由接入网设备所执行的方法。该接入网设备例如可以包括上述接入网设备、目标接入网设备、源接入网设备、第一接入网设备、第二接入网设备等。
第十八方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的核心网设备，或者为设置在核心网设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述方法实施例中由核心网设备所执行的方法。
第十九方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的终端设备，或者为设置在终端设备中的芯片。该通信装置包括：存储器，用于存储计算机可执行程序代码；通信接口，以及处理器，处理器与存储器、通信接口耦合。其中存储器所存储的程序代码包括指令，当处理器执行所述指令时，使通信装置执行上述方法实施例中由终端设备所执行的方法。
第二十方面，提供了一种通信系统，该通信系统包括上述第十七方面所述的通信装置和上述十八方面所述的通信装置，或者，该通信系统包括上述第十七方面所述的通信装置、上述十八方面的通信装置和十九方面所述的通信装置。
第二十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序 代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第二十二方面，提供了一种计算机可读介质，所述计算机可读介质存储有程序代码，当所述计算机程序代码在计算机上运行时，使得计算机执行上述各方面中的方法。
第二十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于接入网设备实现上述方面中所涉及的功能，例如，例如接收或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存接入网设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。该接入网设备例如可以包括上述接入网设备、目标接入网设备、源接入网设备、第一接入网设备、第二接入网设备等。
第二十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于核心网设备实现上述方面中所涉及的功能，例如，例如接收或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存核心网设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第二十五方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于终端设备实现上述方面中所涉及的功能，例如，例如接收或处理上述方法中所涉及的数据和/或信息。在一种可能的设计中，所述芯片系统还包括存储器，所述存储器，用于保存核心网设备必要的程序指令和数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第二十六方面，提供了一种接入网设备，所述接入网设备为目标接入网设备，包括：通信单元，用于接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备；处理单元，用于获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述通信单元还用于向所述核心网设备发送路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备；在获取所述终端设备支持的网络切片选择辅助信息方面，所述处理单元用于通过所述通信单元从所述核心网设备接收路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以通过路径转移请求消息从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述通信单元还用于向核心网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；在获取所述终端设备支持的网络 切片选择辅助信息方面，所述处理单元用于通过所述通信单元从核心网设备接收第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述通信单元用于在发送所述注册请求消息之前，从所述终端设备接收注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；所述通信单元还用于在接收所述第一消息之后，向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中向终端设备发送终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备支持的网络切片选择辅助信息，以便于所述目标接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备的注册区域信息，以便于所述目标接入网设备根据该注册区域信息，判断切换请求消息中的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第二十七方面，提供了一种核心网设备，包括：接收单元，用于从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；发送单元，用于向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，核心网设备可以通过路径转移请求消息向接入网设备发送终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
第二十八方面，提供了一种核心网设备，包括：接收单元，用于从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；发送单元，用于向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支 持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，核心网设备可以在注册更新过程中向目标接入网设备发送终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该网络切片选择辅助信息，进行与终端设备相关的通信，提高了通信效率。
第二十九方面，提供了一种终端设备，包括：发送单元，用于向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；接收单元，用于从所述接入网设备接收第二消息，所述第二消息中包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，终端设备可以在注册更新过程中从目标接入网设备接收终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
第三十方面，提供了一种接入网设备，所述接入网设备为源接入网设备，包括：处理单元，用于生成切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备，所述切换请求消息中包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片；通信单元，用于向所述目标接入网设备发送所述切换请求消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备支持的网络切片选择辅助信息，以便于所述目标接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在一种可能的实现方式中，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备的注册区域信息，以便于所述目标接入网设备根据该注册区域信息，判断切换请求消息中的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
第三十一方面，提供了一种接入网设备，包括：接收单元，用于接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、服务质量流标识(quality of service flow identifier,QoS flow ID,QFI)、第五代移动通信技术服务质量标识(5th generation quality of service identifier,5G QoS ID,5QI)5QI、分配和竞争优先级(Allocation and Retention Priority，ARP)、数据网络名称(data network name,DNN)；发送单元，用于在接收所述第一寻呼消息之后，向终端设备发送第二寻呼消息。
在本申请实施例中，接入网设备接收的寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
在一种可能的实现方式中，所述第二寻呼消息中包括所述第一信息。
在一种可能的实现方式中，所述终端设备处于空闲态，在接收第一寻呼消息方面，所述通信单元用于从核心网设备接收所述第一寻呼消息。
在本申请实施例中，在终端设备处于空闲态的情况下，接入网设备从核心网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
在一种可能的实现方式中，所述终端设备处于非激活态，所述接入网设备为第一接入网设备，在接收第一寻呼消息方面，所述通信单元用于从第二接入网设备接收所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
在本申请实施例中，在终端设备处于非激活态的情况下，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第三十二方面，提供了一种核心网设备，包括：处理单元，用于生成第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息；QFI；5QI；DNN；通信单元，用于向接入网设备发送所述第一寻呼消息。
在本申请实施例中，核心网设备向接入网设备发送的的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第三十三方面，提供了一种接入网设备，包括：处理单元，用于生成第一寻呼消息，所述第一寻呼消息对应于终端设备，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；通信单元，用于发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
在本申请实施例中，终端设备上次驻留的第二接入网设备向当前驻留的第一接入网设备发送的的第一寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
第三十四方面，提供了一种接入网设备，所述接入网设备为目标接入网设备，包括：
通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：通过所述通信接口接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备；获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
在一种可能的实现方式中，所述处理器还用于通过所述通信接口向所述核心网设备发送路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备；在所述获取所述终端设备支持的网络切片选择辅助信息方面，所述处理用于通过所述通信接口从所述核心网设备接收路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
在一种可能的实现方式中，所述处理器还用于通过所述通信接口向核心网设备发送注 册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；在所述获取所述终端设备支持的网络切片选择辅助信息方面，所述处理器用于通过所述通信接口从核心网设备接收第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
在一种可能的实现方式中，所述处理器还用于在发送所述注册请求消息之前，通过所述通信接口从所述终端设备接收所述注册请求消息；以及在接收所述第一消息之后，通过所述通信接口向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息。
在一种可能的实现方式中，所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。
在一种可能的实现方式中，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
第三十五方面，提供了一种核心网设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：通过所述通信接口从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；通过所述通信接口向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
第三十六方面，提供了一种核心网设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：通过所述通信接口从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；通过所述通信接口向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
第三十七方面，提供了一种终端设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：通过所述通信接口向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；通过所述通信接口从所述接入网设备接收第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
第三十八方面，提供了一种接入网设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：通过所述通信接口接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、服务质量流标识(quality of service flow identifier,QoS flow ID,QFI)、第五代移动通信技术服务质量标识(5th generation quality of service identifier,5G QoS ID,5QI)5QI、分配和竞争优先级(Allocation and Retention Priority，ARP)、数据网络名称(data network name,DNN)；以及在接收所述第一寻呼消息之后，通过所述通信接口向终端设备发送第二寻呼消息。
在一种可能的实现方式中，所述第二寻呼消息中包括所述第一信息。
在一种可能的实现方式中，所述终端设备处于空闲态，在接收第一寻呼消息方面，所述处理器用于通过所述通信接口从核心网设备接收所述第一寻呼消息。
在一种可能的实现方式中，所述终端设备处于非激活态，所述接入网设备为第一接入网设备，在接收第一寻呼消息方面，所述通信单元用于从第二接入网设备接收所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
第三十九方面，提供了一种核心网设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：生成第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息；QFI；5QI；DNN；通过所述通信接口向接入网设备发送所述第一寻呼消息。
第四十方面，提供了一种接入网设备，包括：通信接口，存储器，用于存储指令，处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：生成第一寻呼消息，所述第一寻呼消息对应于终端设备，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；通过通信接口发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
附图说明
图1是本申请实施例的应用环境的示意图。
图2是本申请又一实施例的应用环境的示意图。
图3是本申请又一实施例的应用环境的示意图。
图4是本申请实施例的通信方法的流程示意图。
图5是本申请又一实施例的通信方法的具体示例图。
图6是本申请又一实施例的通信方法的具体示例图。
图7是本申请又一实施例的通信方法的流程示意图。
图8是本申请又一实施例的通信方法的具体示例图。
图9是本申请又一实施例的通信方法的流程示意图。
图10是本申请又一实施例的通信方法的具体示例图。
图11是本申请实施例的寻呼方法的流程示意图。
图12是本申请又一实施例的寻呼方法的具体示例图。
图13是本申请又一实施例的寻呼方法的具体示例图。
图14是本申请又一实施例的寻呼方法的具体示例图。
图15是本申请实施例的接入网设备的结构示意图。
图16是本申请实施例的核心网设备的结构示意图。
图17是本申请实施例的终端设备的结构示意图。
图18是本申请又一实施例的接入网设备的结构示意图。
图19是本申请又一实施例的核心网设备的结构示意图。
图20是本申请又一实施例的终端设备的结构示意图。
图21是本申请又一实施例的接入网设备的结构示意图。
图22是本申请又一实施例的核心网设备的结构示意图。
图23是本申请又一实施例的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。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通信(global system formobile communications，GSM)系统、码分多址(code division multiple access，CDMA)系统、宽带码分多址(wideband code division multiple access，WCDMA)系统、通用分组无线业务(general packet radio service，GPRS)、长期演进(long term evolution，LTE)系统、LTE频分双工(frequency division duplex，FDD)系统、LTE时分双工(time division duplex，TDD)、通用移动通信系统(universal mobile telecommunication system，UMTS)、全球互联微波接入(worldwide interoperability for microwave access，WiMAX)通信系统、未来的第五代(5th generation，5G)系统或新无线(new radio，NR)等。
本申请实施例中的终端设备可以指用户设备、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。终端设备还可以是蜂窝电话、无绳电话、会话启动协议(session initiation protocol，SIP)电话、无线本地环路(wireless local loop，WLL)站、个人数字助理(personal digital assistant，PDA)、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备，未来5G网络中的终端设备或者未来演进的公用陆地移动通信网络(public land mobile network，PLMN)中的终端设备等，本申请实施例对此并不限定。
本申请实施例中的接入网设备可以是用于与终端设备通信的设备，该接入网设备可以是全球移动通信(global system formobile communications，GSM)系统或码分多址(code division multiple access，CDMA)中的基站(base transceiver station，BTS)，也可以是宽带码分多址(wideband code division multiple access，WCDMA)系统中的基站(NodeB，NB)，还可以是LTE系统中的演进型基站(evoled NodeB，eNB或eNodeB)，还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器，或者该接入网设备可以为中继站、接入点、车载设备、可穿戴设备以及未来5G网络中的基站(gNB)或者未来演进的PLMN网络中的基站等，或者是接入点(access node,AN)，例如5G-AN。或者，上述接入网设备还可以是由集中式单元(centralized unit,CU)和分布式单元(distribution unit,DU)组成。上述接入网设备可以是CU或者DU。本申请实施例并不限定。
在本申请实施例中，核心网设备例如可以包括：用户面功能(user plane function,UPF)实体、接入和移动性管理功能(Access and Mobility Management function,AMF)，会话管理功能(Session Management function,SMF)。
在本申请实施例中，终端设备、接入网设备或核心网设备包括硬件层、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的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。
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。
为了便于理解，首先介绍本申请实施例中的若干术语。
网络切片选择辅助信息(network slice selection assistance information,NSSAI)：NSSAI可以是一个标准定义的数值，也可以是一个在PLMN内部私有定义的数值。一个NSSAI可以由一个或多个S-NSSAI组成。每个S-NSSAI对应一个特定的网络切片。
终端设备请求的NSSAI(requested NSSAI)：终端设备在注册过程中携带的NSSAI。无线接入网络(radio access network,RAN)可以通过NSSAI选择接入和移动性管理功能(Access and Mobility Management Function，AMF)。例如，当终端设备初始接入网络或者进行注册区域更新(tracking area update,TAU)时。
单网络切片选择辅助信息(single-NSSAI,S-NSSAI)：S-NSSAI对应于一个特定的网络切片。S-NSSAI可以包括切片/服务类型(slice/service type,SST)。或者，S-NSSAI还可以包括网络切片区分标识(slice differentiator,SD)。
其中，SST表示期望网络可以提供的特征以及服务。SD可以作为选择网络切片实例(network slice instances,NSI)时对SST的补足信息。例如，当SST指向多个NSI的时候，SD可以进一步对这些NSI进行划分。
终端设备支持的NSSAI：上述终端设备支持的NSSAI，也可以称为允许的NSSAI(allowed NSSAI)或者允许的S-NSSAI(allowed S-NSSAI)。终端设备支持的NSSAI是指终端设备在当前注册区域可用的一个或多个S-NSSAI。终端设备支持的NSSAI可以指终端设备支持的所有的S-NSSAI。终端设备可以在注册过程中从核心网设备获取上述终端设备支持的NSSAI。
QoS流：5G基于数据资源承载(data resource bearer,DRB)定义了空口上的数据包处理机制。由一个DRB服务的数据包在空口传输中具有相同的包处理机制。基站可以与终端设备之间建立多个DRB以满足具有不同包处理需求的QoS流。需要说明的是，同一个 DRB可以与一个QoS流具有映射关系，也可以与多个QoS流具有映射关系。具体地，对于下行数据传输(down load,DL)，基站可以基于QFI标识和QFI对应的QoS规则(profile)，将QoS流对应的下行数据包映射到对应的DRB上，并进行下行传输。对应上行数据传输(up load,UL)，终端设备根据基站配置的QoS流到DRB的映射关系，将QoS流对应的上行数据包映射至对应的DRB上，并进行上行传输。
QoS流的参数：QoS流的参数也可以称为QoS流的配置参数。具体地，每个QoS流至少包括如下参数：5G QoS标识(5G QoS Identifier,5QI)、分配与保留优先级(an allocation and retention priority,ARP)参数。
5G QoS标识(5G QoS Identifier,5QI)：5G中QoS标识。
非激活(inactive)态：是指在该状态下终端设备和上次驻留接入网设备都保存终端设备接入层上下文信息，且上次驻留接入网设备与核心网保留终端设备相关的NG接口连接。当终端设备在一个上次驻留接入网设备配置的区域内移动时，不需要通知驻留接入网设备。当终端设备离开该驻留区域时，将触发区域更新请求。
图1是本申请实施例的应用环境示意图。如图1所示，其中，终端设备101可以从第二接入网设备102-2的覆盖区域移动到第一接入网设备102-1的覆盖区域。其中第一接入网设备102-1和第二接入网设备102-2均属于接入网设备102。核心网设备103可以分别与各接入网设备102相连。其中，核心网设备103与接入网设备102之间可以存在通信接口。该通信接口例如可以称为N2接口、或者NG接口。可选地，接入网设备102之间可以存在通信接口，该通信接口例如可以称为Xn接口。
上述核心网设备103可以具有公共控制网络功能，或者具有为用户提供接入和移动性管理等功能。上述核心网设备103例如可以是AMF，也可以是前文例示的其他类型的核心网设备。上述接入网设备102可以是前文中例示的LTE基站、5G中的基站、CU或DU等。
可选地，在终端设备101处于连接(connected)态的时候，上述第一接入网设备102-1可以是目标接入网设备，上述第二接入网设备102-2可以是源接入网设备。可选地，当终端设备101处于空闲态(idle)或非激活态(inactive)时，上述第一接入网设备102-1可以是终端设备101当前驻留的基站，可以称为新接入网设备或新基站。上述第二接入网设备102-2可以是终端设备101上次驻留的基站，可以称为锚(anchor)接入网设备或者锚基站。
图2是本申请又一实施例的可能的应用环境示意图。如图2所示，在未来的网络架构中，接入网设备103可以分为集中式单元(Centralized Unit，CU)201和分布式单元(Distributed Unit，DU)202。CU201和DU202可软件化或虚拟化，需要灵活组合的无线接入网络功能将运行在CU201中，例如，业务数据适应协议(Service Data Adaptation Protocol,SDAP)层、分组数据汇聚协议(Packet Data Convergence Protocol,PDCP)，无线资源控制(Radio Resource Control，RRC)等高层功能；而与硬件强相关并且实时性要求较高的RAN功能将运行在DU202中，例如无线链路层控制协议(Radio Link Control，RLC)层、物理层(physical layer，PHY),媒体介入控制层(Media Access Control，MAC)等底层功能。
CU201和DU202之间通过通信接口相连。CU201与核心网设备之间也通过通信接口 相连。在本申请实施例中，CU201和DU202之间的通信接口可以称为F1接口。CU201与核心网设备之间的接口可称为N2接口或NG接口。如图2所示，一个接入网设备102可以包括一个CU201、一个或多个DU202。CU201与DU202之间采用F1接口相连。一个DU202只能连接到一个CU201，一个CU201可以与一个或多个DU202相连。
图3是本申请又一实施例的可能的应用环境示意图。图3在图2架构的基础上，提出了一种新的架构，即在CU部分，将CU分为集中式单元-用户面(Centralized Unit-user plane,CU-UP)301和集中式单元-控制面(Centralized Unit-control plane,CU-CP)302。其中CU-UP301和CU-CP302可以是在不同的物理设备上。CU-UP301和CU-CP302之间可以存在一个开放的接口，该接口可以称为E1接口。与此同时，CU-UP301和CU-CP302与DU均可以有各自的接口，例如，可以称CU-CP302与DU之间的接口为F1-C接口，CU-UP301与DU之间的接口为F1-U接口。
针对图3的架构，可以具有以下特性：一个接入网设备102可以包括一个CU-CP302、多个CU-UP302、多个DU；一个DU只可以连接一个CU-CP302；一个CU-UP301只可以连接一个CU-CP302；一个DU在同一个CU-CP302的控制下可以连接到多个CU-UP301；一个CU-UP301在同一个CU-CP302的控制下可以连接到多个DU。
图4是本申请实施例的通信方法的示意性流程图。图4的方法包括：
S401、所述目标接入网设备接收源接入网设备发送的切换请求消息，相应地，所述源接入网设备向所述目标接入网设备发送所述切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备。
可选地，上述终端设备可以处于连接态。上述终端设备可以从源接入网设备的覆盖区域移动到目标接入网设备的覆盖区域。终端设备可以进行小区测量，并将测量结果上报给源接入网设备。源接入网设备可以根据测量结果确定将所述终端设备切换至目标接入网设备。
可选地，上述切换请求消息中可以包括目标接入网设备需要为终端设备建立的会话列表和各个会话对应的S-NSSAI，该会话列表中可以包含终端设备当前正在进行的所有会话。该会话列表还可以包括每个会话包括的QoS流标识和对应的QoS流参数信息。
S402、所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息(NSSAI)，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。例如，所述终端设备支持的网络切片选择辅助信息可以是allowed NSSAI，allowed NSSAI可以用于指示所述终端设备支持的所有网络切片的标识。
可选地，上述终端设备支持的网络切片选择辅助信息，可以指上述终端设备支持的所有的S-NSSAI。上述终端设备支持的网络切片选择辅助信息可以包括终端设备支持的所有网络切片的标识(identifier,ID)。
在图4的方法中，终端设备从源接入网设备的覆盖范围移动到目标接入网设备的覆盖范围，在为终端设备切换接入网设备的过程中，目标接入网设备可以获取所述终端设备支持的网络切片选择辅助信息，以便于进行相关的通信和控制。
可选地，目标接入网设备在获取所述终端设备支持的网络切片选择辅助信息之后，可以在本地存储所述终端设备支持的网络切片选择辅助信息。
可选地，目标接入网设备可以根据所述终端设备支持的网络切片选择辅助信息，进行 与所述终端设备有关的通信。
例如，目标接入网设备可以根据所述终端设备支持的网络切片选择辅助信息进行网络切片级别的差异化处理。包括以下处理方式中的至少一种：指导空闲态和非激活态的终端设备进行网络切片的异频小区重选；在切换时为所述终端选择目标接入网设备；调整接入控制参数配置，例如接入禁止概率参数，禁止时间等；RRC测量参数配置，如测量周期、测量门限、测量对象(如载波频段、载波频段优先级、同步消息块频段、同步消息块测量优先级、信道状态信息参考信号载频)等。或者，可以在应用专用的无线资源管理(Radio resource management,RRM)策略时，将终端设备支持的网络切片选择辅助信息作为考虑因素。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
可选地，本申请实施例的技术方案可以是基于直接接口(例如，Xn接口)之间的切换。即源接入网设备和目标接入网设备之间通过接口直接交互切换信息。或者，本申请实施例的技术方案可以是基于间接接口(例如，N2接口)之间的切换。即源接入网设备和目标接入网设备之间通过核心网设备交互切换信息。即核心网设备作为中介，转发源接入网设备和目标接入网设备之间交互的切换信息。
可选地，在终端设备切换接入网设备的过程中，上述源接入网设备和目标接入网设备可以属于相同的注册区域(registration area)，也可以属于不同的注册区域。若源接入网设备和目标接入网设备属于相同的注册区域，则在切换前后，终端设备支持的网络切片选择辅助信息是相同的。若源接入网设备和目标接入网设备属于不用的注册区域，则在切换前后，终端设备支持的网络切片选择辅助信息可能不同，因此需要更新。
可选地，上述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括多种途径。例如，上述目标接入网设备可以从核心网设备获取所述终端设备支持的网络切片选择辅助信息。或者，上述目标接入网设备也可以从源接入网设备获取所述终端设备支持的网络切片辅助信息。
在一个示例中，目标接入网设备从核心网设备获取终端设备支持的网络切片选择辅助信息，可以采取如下方式：所述目标接入网设备向所述核心网设备发送路径转移请求(path switch request)消息，相应地，所述核心网设备从所述目标接入网设备接收所述路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备。所述目标接入网设备从所述核心网设备接收路径转移响应(path switch request acknowledge)消息，相应地，所述核心网设备向所述目标接入网设备发送所述路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以通过路径转移请求消息从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
在另一示例中，若目标接入网设备从核心网设备获取终端设备支持的网络切片选择辅 助信息，还可以采取如下方法：所述目标接入网设备向核心网设备发送注册请求(registration request)消息，相应地，所述核心网设备从所述目标接入网设备接收所述注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；所述目标接入网设备从核心网设备接收第一消息，相应地，所述核心网设备向所述目标接入网设备发送所述第一消息，所述第一消息包括注册接受(registration accept)消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
可选地，所述第一消息可以是N2接口信令消息。例如，下行非接入层传输消息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中从核心网设备获取终端设备支持的网络切片选择辅助信息，以便于目标接入网设备根据该终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
可选地，上述方法还包括：在目标接入网设备发送所述注册请求消息之前，所述目标接入网设备从所述终端设备接收所述注册请求消息。相应地，所述终端设备向所述目标接入网设备发送所述注册请求消息。可选地，上述方法还包括：在目标接入网设备接收所述第一消息之后，所述目标接入网设备向所述终端设备发送第二消息。相应地，所述终端设备接收所述目标接入网设备发送的所述第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息。
其中，所述目标接入网设备相当于向核心网设备透传所述注册请求消息。即该注册请求消息可以是非接入层(Non-access stratum,NAS)消息。类似地，所述目标接入网设备相当于向所述终端设备透传所述注册接受消息。所述注册接收消息可以是NAS信息。而所述第二消息可以是RRC消息或其他类型的空口消息。
需要说明的是，若源接入网设备和目标接入网设备属于同一注册区域，则不需要进行注册区域更新，即终端设备不需要向目标接入网设备发送注册请求消息。在源接入网设备和目标接入网设备不属于同一注册区域的情况下，终端设备才需要向目标接入网设备发送注册请求消息。
需要说明的是，本申请实施例中对各消息的名称不作限定。各消息的名称仅作为例示，各消息也可以采用其他名称，只要其实现的功能是相同的即可。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，目标接入网设备可以在注册更新过程中向终端设备发送终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
在另一示例中，若目标接入网设备从源接入网设备获取所述终端设备的网络切片选择辅助信息，可以采用如下方式：所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。目标接入网设备可以从源接入网设备发送的切换请求消息中获取所述终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备支持的网络切片选择辅助信息，以便于所述目标接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，提高了通信效率。
进一步地，上述切换请求消息中还可以包括所述终端设备的注册区域信息，所述注册 区域信息用于指示所述终端设备对应的跟踪区域(tracking area)。
例如，上述注册区域信息可包括跟踪区域列表，每个跟踪区域可以由跟踪区域码(tracking area code,TAC)表示。例如，下表1是注册区域信息的示例。
表1
TAI列表
>TAC
目标接入网设备可以根据上述注册区域信息，确定所述源接入网设备与所述目标接入网设备是否属于同一注册区域，即判断目标接入网设备是否位于终端设备的注册区域。若目标接入网设备也位于终端设备的注册区域，则表示终端设备的网络切片选择辅助消息有效。若目标接入网设备没有位于终端设备的注册区域，则表示终端设备的网络切片选择辅助信息无效，目标接入网设备需要从其他途径获取更新后的终端设备的网络切片选择辅助信息。例如，目标接入网设备可以从核心网设备获取更新后的终端设备的网络切片选择辅助信息。例如，具体可以通过核心网设备发送的路径转移响应消息或者第一消息获取更新后的终端设备的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，源接入网设备向目标接入网设备发送的切换请求消息中包括终端设备的注册区域信息，以便于所述目标接入网设备根据该注册区域信息，判断切换请求消息中的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
图5是本申请又一实施例的通信方法的具体示例。其中，图4中的源接入网设备可以为图5中的源基站，图4中的目标接入网设备可以是图5中的目标基站。源基站和目标基站之间可以存在通信接口，例如，Xn接口。若源基站和目标基站之间不存在通信接口，则核心网设备可以作为中介，转发源基站和目标基站之间交互的信息。即源基站和目标基站通过N2接口或NG接口通信。图5的方法包括：
S501、源基站向目标基站发送切换请求消息，相应地，目标基站从源基站接收所述切换请求消息。
可选地，上述切换请求消息中可以包括终端设备支持的网络切片选择辅助信息，例如allowed NSSAI。目标基站可以根据该allowed NSSAI对终端设备进行RRC连接重配置。例如RRC测量参数配置(例如如测量周期、测量门限、测量对象(如载波频段、载波频段优先级、同步消息块频段、同步消息块测量优先级、信道状态信息参考信号载频)等)。目标基站也可以根据该allowed NSSAI进行基于网络切片信息的接纳控制(例如在allowed NSSAI的切片发生拥塞时，拒绝源基站的切换请求)等。
可选地，上述切换请求消息中也可以包括终端设备当前的注册区域信息，例如，TAI列表。目标基站可以根据该注册区域信息判断该allowed NSSAI是否适用于目标基站。
可选地，上述切换请求消息中可包含目标基站需要为终端建立的会话列表和各个会话对应的S-NSSAI，该会话列表中将包含终端当前正在进行的所有会话。同时包括每个会话包括的QoS流ID和对应的QoS流参数信息。
S502、目标基站进行接入控制。
例如，目标基站可以根据其支持的网络切片、接收到的终端设备支持的网络切片选择 辅助信息以及自身资源使用的状况等进行接入控制。
S503、目标基站向源基站发送切换请求响应消息，相应地，源基站从目标基站接收该切换请求响应消息。
可选地，上述切换请求响应消息中可以包括目标基站接收的会话的列表，以及拒绝的会话的列表。也包括目标基站接受的会话中接受的QoS流列表，以及拒绝的会话的列表及拒绝原因。
S504、源基站和终端设备之间执行切换操作(handover execution)。
具体地，源基站向终端发送切换命令消息。可选地，该切换命令消息中包含目标基站的承载配置信息。
在接收到切换命令消息之后，终端设备可以与目标基站之间进行随机接入，并在随机接入过程完成后向目标基站发送切换确认消息。
S505、目标基站向核心网设备发送路径转移请求(path switch request)消息。
可选地，该路径转移请求消息包含了被接受的会话和不被目标基站在切换执行过程中接受的会话，或者说被接收的会话和被拒绝的会话。也包括目标基站接受的会话中接受的QoS流列表，以及拒绝的会话的列表及拒绝原因。
S506、核心网设备向目标基站发送路径转移请求响应(path switch request ack)消息。
可选地，在该路径转移请求响应消息中可以包括所述终端设备支持的网络切片选择辅助信息。
其中，若目标基站和源基站不属于同一注册区域，则上述路径转移请求响应消息可以包括更新后的终端设备支持的网络切片选择辅助信息。若目标基站和源基站属于同一注册区域，则上述终端设备支持的网络切片选择辅助信息不更新。
可选地，若目标基站和源基站不属于同一注册区域，则还可以包括如下步骤507。
S507、终端设备与核心网设备之间进行注册更新。
具体地，终端设备向核心网设备发送注册请求(registration request)消息，核心网设备通过目标基站向终端设备发送注册接受(registration accept)消息。
其中，可选地，在终端设备执行注册更新的过程中，核心网设备可以向接入网设备发送N2接口信令，并在N2接口信令中包括所述注册接受消息以及更新的所述终端设备支持的网络切片选择辅助信息。接入网设备可以通过该N2接口信令获取更新的终端设备支持的网络切片选择辅助信息。
其中，所述注册请求消息和所述注册接收信息可以是NAS层信息。
需要说明的是，若目标基站和源基站属于同一注册区域，则不需要步骤507。
需要说明的是，本申请实施例中的序号并不对执行各个步骤的时间顺序作限定。例如，图5中的步骤S504可以发生在步骤S505之前，也可以发生在步骤S505之后，本申请实施例对此不作限定。
图6是本申请又一实施例的通信方法的具体示例。图6示出了图5中的步骤507的具体执行过程。如图6所示，图6的方法包括：
S601、终端设备向目标基站发送注册请求消息，相应地，目标基站从终端设备接收所述注册请求消息。
可选地，所述注册请求消息为NAS层消息，即目标基站不解析该注册请求消息。
S602、目标基站向核心网设备发送所述注册请求消息，相应地，核心网设备从目标基站接收所述注册请求消息。
即，目标基站可以透传所述注册请求消息。
S603、核心网设备向目标基站发送第一消息，相应地，所述目标基站从所述核心网设备接收所述第一消息，所述第一消息中包括注册接受消息和所述终端设备支持的网络切片选择辅助信息。
可选地，所述第一消息可以是N2接口消息，所述注册接受消息可以是NAS层信息。即接入网设备可以解析第一消息，但不能解析注册接受消息。接入网设备可以根据第一消息，获取和解析所述终端设备支持的网络切片选择辅助信息。
S604、所述目标基站向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息，相应地，所述终端设备从所述目标基站接收所述第二消息。
可选地，所述第二消息中也可以包括所述终端设备支持的网络切片选择辅助信息，以便于所述终端设备获取更新后的终端设备支持的网络切片选择辅助信息。
在本申请实施例中，在终端设备从源接入网设备切换至目标接入网设备的过程中，终端设备可以在注册更新过程中从目标接入网设备接收终端设备支持的网络切片选择辅助信息，以便于终端设备根据该网络切片选择辅助信息，进行相关的通信，提高了通信效率。
图7是本申请又一实施例的通信方法的流程示意图。图7的方法中，当终端设备处于非激活态时，终端设备从第二接入网设备移动到第一接入网设备，并且终端设备从非激活态转换为连接态的过程中，第一接入网设备需要从第二接入网设备获取终端设备的上下文。在第二接入网设备向第一接入网设备发送的终端设备上下文响应消息中可以包括所述终端设备支持的网络切片选择辅助信息，以便于第一接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信。图7的方法包括：
S701、第一接入网设备向第二接入网设备发送获取终端设备上下文请求消息，相应地，所述第二接入网设备从所述第一接入网设备接收所述获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。上述第一接入网设备也可以称为新接入网设备或者新基站或者新服务基站。上述第二接入网设备也可以称为锚接入网设备或者锚基站或者上次驻留基站。
可选地，上述终端设备从非激活态转换为连接态。或者说，上述终端设备在非激活态下从第二接入网设备的覆盖区域移动到第一接入网设备的覆盖区域，并且在第一接入网设备提供服务的情况下从非激活态转换为连接态。
其中，上述驻留也可以称为服务，即第一接入网设备可以指为所述终端设备提供服务的接入网设备，所述第二接入网设备是指上一次为终端设备提供服务的接入网设备。或者说最后一次为终端设备提供服务的接入网设备。
S702、所述第一接入网设备从所述第二接入网设备接收获取终端设备上下文响应消息，相应地，所述第二接入网设备向所述第一接入网设备发送所述获取终端上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
可选地，所述获取终端设备上下文响应消息中还可以包括所述终端设备的上下文。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备获取终端设备上下文响应消息，该获取终端设备上下文响应消息中包括所述终端设备支持的网络切片选择辅助信息，以便于所述第一接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的通信，从而提高通信效率。
可选地，图7的方法还包括：所述第一接入网设备从所述第二接入网设备接收所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
在一个示例中，上述注册区域信息也可以承载于上述终端设备上下文响应消息之中。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备获取终端设备的注册区域信息，以便于所述第一接入网设备根据该注册区域信息，判断第二接入网设备发送的终端设备支持的网络切片选择辅助信息是否有效，提高了通信效率。
图8是本申请又一实施例的通信方法的具体示例。其中图7中的第一接入网设备可以是图8中的新服务基站，图7中的第二接入网设备可以是图8中的锚基站。图8中的终端设备在处于非激活态的情况下从锚基站移动到新服务基站。终端设备请求从非激活态转换为连接态。新服务基站在从锚基站获取终端设备的上下文的过程中，获取终端设备支持的网络切片选择辅助信息。图8的方法包括：
S801、终端设备与新服务基站进行随机接入。
S802、终端设备向新服务基站发送RRC恢复请求(RRC Resume Request)消息。
其中，上述RRC恢复请求消息可以用于指示恢复请求原因，例如周期提醒区域更新请求，终端初始的信令请求等。
S803、新服务基站向锚基站发送获取终端设备上下文请求消息。
S804、锚基站向新服务基站发送获取终端设备上下文响应消息。
可选地，上述获取终端设备上下文响应消息中可包括终端设备支持的网络切片选择辅助信息，即allowed NSSAI。新服务基站可以根据该allowed NSSAI对终端设备进行RRC连接重配置。例如RRC测量参数配置、基于网络切片信息的接纳控制等。
在本申请实施例中，在终端设备从非激活态转换为连接态的过程中，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备获取终端设备上下文响应消息，该获取终端设备上下文响应消息中包括所述终端设备支持的网络切片选择辅助信息，以便于所述第一接入网设备根据该网络切片选择辅助信息，进行与所述终端设备相关的的通信，从而提高通信效率。
图9是本申请又一实施例的通信方法的流程示意图。如图9所示，图9的方法包括：
S901、接入网设备从终端设备接收第三消息，相应地，终端设备向接入网设备发送所述第三消息，所述第三消息包括服务请求(service request)信息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息(S-NSSAI)。
其中，所述终端设备支持的网络切片选择辅助信息可以用于指示所述终端设备支持的网络切片，所述单网络切片选择辅助信息可以用于指示触发所述服务请求消息的网络切片。
其中，所述终端设备支持的网络切片选择辅助信息可以是终端设备请求的网络切片 (例如，requested NSSAI)。
其中上述服务请求消息可以是非接入层(Non-access Stratum,NAS)信息。即接入网设备不能解析该服务请求消息，接入网设备相当于透传所述服务请求消息。
可选地，上述第三消息可以是RRC层消息。例如上述第三消息可以是RRC建立请求消息或者RRC建立完成消息。
可选地，所述接入网设备在接收所述第三消息之后，可以根据所述终端设备支持的网络切片选择辅助信息，进行与所述终端设备相关的通信。
S902、所述接入网设备向核心网设备发送第四消息，相应地，核心网设备从所述接入网设备接收所述第四消息，所述第四消息包括所述服务请求消息。
其中，第四消息可以是N2接口消息，接入网设备向核心网设备发送服务请求消息，相当于向核心网设备透传上述服务请求消息。
在本申请实施例中，在终端设备从空闲态转换为连接态的过程中，接入网设备接收终端设备发送的第三消息，该第三消息中包括服务请求消息，还包括所述终端设备支持的网络切片选择辅助信息和/或触发该服务请求消息的单网络切片选择辅助信息(S-NSSAI)，以便于接入网设备根据第三消息，获取上述终端设备支持的网络切片选择辅助信息和/或单网络切片选择辅助信息，以进行相关的控制或通信。
所述接入网设备在接收所述单网络切片选择辅助信息之后，可以根据所述单网络切片选择辅助信息，进行与服务请求消息相关的控制和通信，例如，在触发所述服务请求消息的网络切片未发生拥塞的情况下，所述接入网设备向核心网设备转发所述服务请求消息。或者，在触发所述服务请求消息的网络切片发生拥塞的情况下，所述接入网设备不向核心网设备发送第二服务请求消息。所述接入网设备释放所述终端设备的RRC连接，例如，向所述终端设备发送RRC连接释放消息。在RRC连接释放消息中，所述接入网设备指示RRC连接释放原因，例如跟踪区域更新等。可选地，核心网设备可以向接入网设备发送通知消息，以指示哪些网络切片发生拥塞。比如，AMF可以在发送到5G-AN节点的N2接口控制消息中包括S-NSSAI，以指示核心网处的网络切片的拥塞。
图10是本申请实施例的通信方法的具体示例。在图10中，处于空闲态的终端设备从上次驻留的基站移动到新的基站。并且终端设备请求从空闲态转换为连接态。终端设备可以向接入网设备发送终端设备支持的网络切片选择辅助信息。如图10所示，图10的方法包括：
S1001、终端设备向接入网设备发送第三消息，该第三消息中包括服务请求(service request)消息，该服务请求消息用于请求所述终端设备从空闲态转换为连接态。该第三消息还可以包括requested NSSAI。requested NSSAI可以包括所述终端设备支持的网络切片选择辅助信息，(例如，allowed NSSAI)和/或单网络切片选择辅助信息(S-NSSAI)。该第三消息还可以包括所述终端请求的网络切片选择辅助信息(Requested NSSAI)。
其中，所述终端设备在处于空闲态的情况下，若有上行数据需要发送时，则可以触发产生上述服务请求消息。
其中，上述allowed NSSAI可以指所述终端设备支持的所有网络切片。所述S-NSSAI可以用于指示触发所述服务请求消息的网络切片。
可选地，上述服务请求消息可以是NAS信息，上述第三消息可以是RRC消息。为了 让接入网设备感知所述终端设备对应的切片信息，所述第三消息中可以携带上述终allowed NSSAI和/或S-NSSAI。
上述第三消息例如可以是RRC建立请求消息或RRC建立完成消息。
S1002、接入网设备向核心网设备发送第四消息，所述第四消息包括所述服务请求消息。
在一些示例中，接入网设备可以从核心网设备接收关于哪些网络切片发生拥塞的信息。接入网设备基于该allowed NSSAI，可以执行如下行为：例如，当触发该服务请求消息的网络切片发生拥塞时，接入网设备将不向核心网设备发送第四消息。接入网设备可以释放终端设备的RRC连接，例如，向终端设备发送RRC连接释放消息。在RRC连接释放消息中，接入网设备指示RRC连接释放原因，例如跟踪区域更新等。否则，接入网设备向核心网设备发送第四消息。可选地，接入网设备也可以触发终端设备以执行小区重选和/或注册更新。
S1003、核心网向接入网设备发送应答消息。
S1004、接入网设备向UE发送RRC连接重配置消息。
从而终端设备进入连接态，可以进行正常的UL、DL数据传输过程。
在本申请实施例中，在终端设备从空闲态转换为连接态的过程中，接入网设备接收终端设备发送的第三消息，该第三消息中包括服务请求消息，还包括所述终端设备支持的网络切片选择辅助信息和/或触发该服务请求消息的单网络切片选择辅助信息(S-NSSAI)，以便于接入网设备根据第三消息，获取上述终端设备支持的网络切片选择辅助信息和/或单网络切片选择辅助信息，以进行相关的控制或通信。
图11是本申请实施例的寻呼方法的流程示意图。如图11所示，该方法包括：
S1101、接入网设备接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、分配和抢占优先级(allocation and retention priority，ARP)和DNN。
其中，所述第一信息可以用于指示触发所述第一寻呼消息的因素。例如，可以是由网络切片触发所述第一寻呼消息。上述网络切片的信息可以包括以下至少一项：触发所述第一寻呼消息的单网络切片选择辅助信息(S-NSSAI)、所述终端设备支持的网络切片选择辅助信息。即由S-NSSAI触发所述第一寻呼消息。其中，所述终端设备支持的网络切片选择辅助信息可以指所述终端设备支持的所有S-NSSAI。或者，第一信息可以指示哪个QFI或5QI触发了该第一寻呼消息，又或者，第一寻呼消息可以指示是哪个DNN触发所述第一寻呼消息。又或者，第一寻呼消息可以指示是哪个ARP触发所述第一寻呼消息。
S1102、所述接入网设备在接收所述第一寻呼消息之后，向终端设备发送第二寻呼消息，相应地，所述终端设备接收所述第二寻呼消息。
可选地，接入网设备可以根据所述第一寻呼消息，发送所述第二寻呼消息。例如，接入网设备可以将第一寻呼消息确定为所述第二寻呼消息，并发送所述第二寻呼消息。或者接入网设备也可以将第一寻呼消息中的第一信息删掉，以获取第二寻呼消息，并发送所述第二寻呼消息。
在本申请实施例中，接入网设备接收的寻呼消息中可以包括第一信息，第一信息可以包括网络切片的信息、QFI、5QI、ARP或者DNN。接入网设备可以根据第一信息，进行 相关的控制或通信，以提高通信效率。
例如，接入网设备根据网络切片信息，确定其发送第二寻呼消息策略，如寻呼优先级，寻呼次数，寻呼区域(包括一个或者多个小区列表)。在一种实现方式中，接入网设备优先发送针对高可靠低时延网络切片的第二寻呼消息，或者在更大小区范围内发送第二寻呼消息，或者发送多次第二寻呼消息。
例如，接入网设备根据QFI或者5QI信息，确定其发送第二寻呼消息策略，如寻呼优先级，寻呼次数，寻呼区域(包括一个或者多个小区列表)。在一种实现方式中，接入网设备优先发送针对高优先级的QFI或者5QI的第二寻呼消息，或者在更大小区范围内发送第二寻呼消息，或者发送多次第二寻呼消息。
例如，接入网设备根据ARP信息，确定其发送第二寻呼消息测量，如寻呼优先级，寻呼次数，寻呼区域(包括一个或者多个小区列表)。在一种实现方式中，接入网设备优先发送针对高优先级的ARP的第二寻呼消息，或者在更大小区范围内发送第二寻呼消息，或者发送多次第二寻呼消息。
可选地，接入网设备向所述终端设备发送的第二寻呼消息中可以包括所述第一信息，也可以不包括所述第一信息。
可选地，所述终端设备可以处于空闲态，所述接入网设备接收第一寻呼消息，包括：所述接入网设备从核心网设备接收所述第一寻呼消息，相应地，所述核心网设备向所述接入网设备发送所述第一寻呼消息。
换句话说，在终端设备处于空闲态的情况下，第一寻呼消息是由核心网设备发起的。例如，当核心网设备发现有终端设备的数据到达时，将触发核心网启动寻呼(CN initiated paging)。
在本申请实施例中，在终端设备处于空闲态的情况下，接入网设备从核心网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括以下一个或多个：网络切片的信息、QFI、5QI、ARP和DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
可选地，触发寻呼消息的S-NSSAI可以在用于RAN寻呼和RAN拥塞控制的寻呼消息中携带。因此，应该可以允许RAN拥有其基于考虑网络切片的服务等级协议(Service-Level Agreement，SLA)要求的专用切片处理。例如，接入网设备可以考虑网络切片级别的寻呼优先级，网络切片支持的区域等。由于寻呼请求可能被一个特定的网络切片触发，因此，AMF传输触发寻呼消息的相应S-NSSAI将更有价值。
NSSAI的另一个潜在的使用方案是用于RAN过载控制。例如，当寻呼消息中的网络切片过载时，接入网设备可以不广播RRC寻呼消息。传送触发寻呼的S-NSSAI比传输终端设备支持的所有S-NSSAI更有利。
例如，所述接入网设备向终端设备发送第二寻呼消息，包括：在所述无线接入网不拥塞的情况下，所述接入网设备向所述终端设备发送所述第二寻呼消息；所述方法还包括：在无线接入网拥塞的情况下，所述接入网设备不发送所述第二寻呼消息，并向所述核心网设备发送寻呼失败指示信息，以指示所述寻呼失败。
在本申请实施例中，接入网设备可以根据无线接入网的拥塞情况，确定是否发送第二寻呼消息，从而提高通信效率。
可选地，所述接入网设备可以根据所述第一信息确定所述第一寻呼消息的优先级，例如，不同的网络切片对应不同的优先级，所述接入网设备可以根据第一信息确定所述终端设备支持的网络切片的优先级，或者触发所述第一信息的网络切片的优先级，并根据网络切片的优先级确定所述第一寻呼消息的优先级。当接入网设备收到多个寻呼消息时，接入网设备可以根据各寻呼消息对应的优先级，优先发送优先级高的寻呼消息。或者优先为优先级高的寻呼消息分配资源。
在本申请实施例中，接入网设备可以根据第一信息，确定第一寻呼消息的优先级，并根据第一寻呼消息的优先级，进行寻呼，提高了通信效率。
可选地，所述终端设备可以处于非激活态，则假设所述接入网设备为第一接入网设备，所述接入网设备接收第一寻呼消息，包括：所述第一接入网设备从第二接入网设备接收所述第一寻呼消息，相应地，所述第二接入网设备向所述第一接入网设备发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
换句话说，在终端设备处于非激活态的情况下，第一寻呼消息是由终端设备上次驻留的第二接入网设备发起的。例如，当核心网设备发现有终端设备的数据到达时，会向第一接入网设备发送该第一寻呼消息。收到终端设备上下文请求消息后，第二接入网设备将该下行数据发送给第一接入网设备。
在本申请实施例中，在终端设备处于非激活态的情况下，终端设备当前驻留的第一接入网设备从终端设备上次驻留的第二接入网设备接收的第一寻呼消息中可以包括第一信息，第一信息可以包括以下至少一项：网络切片的信息、QFI、5QI、ARP和DNN。接入网设备可以根据第一信息，进行相关的控制或通信，以提高通信效率。
可选地，所述第一接入网设备基于所述第一信息，发送所述第二寻呼消息。
例如，所述第一接入网设备向终端设备发送第二寻呼消息，包括：在所述无线接入网不拥塞的情况下，所述第一接入网设备向所述终端设备发送所述第二寻呼消息；所述方法还包括：在无线接入网拥塞的情况下，所述第一接入网设备不发送所述第二寻呼消息，并向所述第二接入网设备发送寻呼失败指示信息，以指示所述寻呼失败。
在本申请实施例中，第一接入网设备可以根据无线接入网的拥塞情况，确定是否发送第二寻呼消息，从而提高通信效率。
可选地，所述第一接入网设备可以根据所述第一信息确定所述第一寻呼消息的优先级，例如，不同的网络切片对应不同的优先级，所述第一接入网设备可以根据第一信息确定所述终端设备支持的网络切片的优先级，或者触发所述第一信息的网络切片的优先级，并根据网络切片的优先级确定所述第一寻呼消息的优先级。当第一接入网设备收到多个寻呼消息时，第一接入网设备可以根据各寻呼消息对应的优先级，优先发送优先级高的寻呼消息。或者优先为优先级高的寻呼消息分配资源。
在本申请实施例中，第一接入网设备可以根据第一信息，确定第一寻呼消息的优先级，并根据第一寻呼消息的优先级，进行寻呼，提高了通信效率。
在一些示例中，接入网设备采用了CU-DU分离的架构。在这种情况下，对于处于空闲态的终端设备，当CU收到核心网设备发送的第一寻呼消息时，然后由CU向DU发送第二寻呼消息。类似地，DU在收到CU发送的第二寻呼消息之后，向终端设备发送第三 寻呼消息。其中，上述第一寻呼消息中可以携带上述第一信息，进一步地，上述第二寻呼消息和第三寻呼消息中也可以携带上述第一信息。CU和DU可以根据上述第一信息，进行与终端设备相关的通信或寻呼，此处与前文中的内容相似，不再赘述。
对于非激活态的终端设备，当CU收到源接入网设备发送的下行数据时，可以触发寻呼。由CU向DU发送寻呼消息。该寻呼消息中也可以携带上述第一信息。
图12是本申请实施例的寻呼方法的具体示例图。其中，图12中的终端设备空闲态。即由核心网设备触发寻呼。当核心网设备发现有终端设备对应的下行数据时，向接入网设备发送寻呼消息。图12的方法包括：
S1201、核心网设备向接入网设备发送第一寻呼消息，相应地，接入网设备从核心网设备接收该第一寻呼消息，该第一寻呼消息中包括第一信息。
该第一寻呼消息可以是N2接口信令。第一信息中可以携带以下消息中的至少一种：一个或者多个S-NSSAI(s)，以指示是由于哪个/那些S-NSSAI触发寻呼消息；所述终端设备支持的S-NSSAI；QFI/5QI，指示是由于哪个/哪些QFI/5QI触发的寻呼消息；DNN或者DNN的索引，以指示哪个DNN中的QFI/5QI触发的寻呼消息；触发所述第一寻呼消息的单网络切片选择辅助信息(S-NSSAI)和/或所述终端设备支持的网络切片选择辅助信息；ARP，以指示是由于ARP触发的寻呼消息。
S1202、接入网设备向终端设备发送第二寻呼消息，相应地，所述终端设备接收所述第二寻呼消息。
可选地，所述第二寻呼消息可以包括所述第一信息，也可以不包括所述第一信息。
在一些示例中，接入网设备可以基于收到的第一寻呼消息，执行如下操作：
如果无线接入网发生的拥塞，将不发送第二寻呼消息，并反馈失败消息给核心网设备。
或者，所述接入网设备在第二寻呼消息中携带第一信息，并将第二寻呼消息广播给终端设备。终端设备接收到第一信息之后，可以根据第一信息指示终端设备执行资源分割。该资源例如可以是随机接入信道(Random Access Channel,RACH)资源分割，或者在RRC连接建立请求中指示连接建立原因值，例如指示网络切片标识、5QI/QFI标识、ARP标识、DNN标识，或者其映射值。
图13是本申请实施例的寻呼方法的具体示例图。其中，图13中的终端设备非激活态。即由终端设备上次驻留的接入网设备触发寻呼。当核心网设备发现有终端设备对应的下行数据时，将向终端设备上次驻留的第二接入网设备发送该下行数据，第二接入网设备在接收到该下行数据之后，向终端设备当前驻留的第一接入网设备发送寻呼消息。如图13所示，寻呼方法包括：
S1301、第二接入网设备向第一接入网设备发送第一寻呼消息，相应地，第一接入网设备从第二接入网设备接收该第一寻呼消息，该第一寻呼消息中包括第一信息。第一接入网设备为终端设备当前驻留的接入网设备，第二接入网设备为终端设备上次驻留的接入网设备。
该第一寻呼消息可以是N2接口信令。第一信息中可以携带以下消息中的至少一种：一个或者多个S-NSSAI(s)，以指示是由于哪个/那些S-NSSAI触发寻呼消息；所述终端设备支持的S-NSSAI；QFI/5QI，指示是由于哪个/哪些QFI/5QI触发的寻呼消息；DNN或者DNN的索引，以指示哪个DNN中的QFI/5QI触发的寻呼消息；触发所述第一寻呼消息的 单网络切片选择辅助信息(S-NSSAI)和/或所述终端设备支持的网络切片选择辅助信息。ARP指示，指示是由于ARP触发的寻呼消息。
S1302、第一接入网设备向终端设备发送第二寻呼消息，相应地，所述终端设备接收所述第二寻呼消息。
可选地，所述第二寻呼消息可以包括所述第一信息，也可以不包括所述第一信息。
在一些示例中，第一接入网设备可以基于收到的第一寻呼消息，执行如下操作：
如果无线接入网发生的拥塞，将不发送第二寻呼消息，并反馈失败消息给第二接入网设备；
或者，所述接入网设备在第二寻呼消息中携带第一信息，并将第二寻呼消息广播给终端设备。终端设备接收到第一信息之后，可以根据第一信息指示终端设备执行资源分割。该资源例如可以是随机接入信道(Random Access Channel,RACH)资源分割，，或者在RRC连接建立请求中指示连接建立原因值，例如指示网络切片标识、5QI/QFI标识、ARP标识、DNN标识，或者其映射值。
图14是本申请实施例的寻呼方法的具体示例图。其中，图14中的接入网设备为CU-DU分离的架构。图14的方法包括：
S1401、CU确定第一寻呼消息，该第一寻呼消息中包括第一信息。
可选地，若终端设备处于空闲态，则该第一寻呼消息可以是核心网设备发送的。该第一寻呼消息可以是N2接口信令。
或者，若终端设备处于非激活态，则可以是CU在接收到终端设备的下行数据之后生成的。即假设处于非激活态的终端设备从同一CU下的第一DU移动到第二DU。则由该CU生成第一寻呼消息，并向第二DU发送。
可选地，第一信息中可以携带以下消息中的至少一种：一个或者多个S-NSSAI(s)，以指示是由于哪个/那些S-NSSAI触发寻呼消息；所述终端设备支持的S-NSSAI；QFI/5QI，指示是由于哪个/哪些QFI/5QI触发的寻呼消息；DNN或者DNN的索引，以指示哪个DNN中的QFI/5QI触发的寻呼消息；触发所述第一寻呼消息的单网络切片选择辅助信息(S-NSSAI)和/或所述终端设备支持的网络切片选择辅助信息；ARP，以指示是由于ARP触发的寻呼消息。
S1402、CU向DU发送第二寻呼消息。相应地，DU从CU接收所述第二寻呼消息。
可选地，所述第二寻呼消息可以包括所述第一信息，也可以不包括所述第一信息。
可选地，DU在接收到第二寻呼消息之后，也可以向终端设备发送第三寻呼消息，该第三寻呼消息中也可以包括该第一信息。
前文结合图1至图14介绍了本申请实施例的通信方法和寻呼方法，下文中将结合附图15-图23，介绍本申请实施例中的装置。
图15是本申请实施例的接入网设备1500的示意性框图。应理解，接入网设备1500能够执行图1至图14的方法中由接入网设备执行的各个步骤，为了避免重复，此处不再详述。接入网设备例如可以是前文中的接入网设备、目标接入网设备、第一接入网设备或第二接入网设备，接入网设备1500包括：接收单元1510和发送单元1520，
所述接收单元1510用于接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、服务质量流标识(quality of service flow  identifier,QoS flow ID,QFI)、第五代移动通信技术服务质量标识(5th generation quality of service identifier,5G QoS ID,5QI)5QI、数据网络名称(data network name,DNN)、分配和竞争优先级(Allocation and Retention Priority，ARP)；所述发送单元1520用于在接收所述第一寻呼消息之后，向终端设备发送第二寻呼消息。
或者，所述接入网设备1500可以为上述第一接入网设备，所述发送单元1520用于向第二接入网设备发送获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；所述接收单元1510用于从所述第二接入网设备接收获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述接入网设备1500可以为上述第二接入网设备，所述接收单元1510用于从第一接入网设备接收获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；所述发送单元1520用于向所述第一接入网设备发送获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述接收单元1510用于从终端设备接收第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；所述发送单元1520用于向核心网设备发送第四消息，所述第四消息包括所述服务请求消息。
图16是本申请实施例的核心网设备1600的示意性框图。应理解，核心网设备1600能够执行图1至图14的方法中由核心网设备执行的各个步骤，为了避免重复，此处不再详述。核心网设备1600包括：接收单元1610和发送单元1620，
接收单元1610用于从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；发送单元1620用于向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述接收单元1610用于从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；所述发送单元1620用于向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
图17是本申请实施例的终端设备1700的示意性框图。应理解，终端设备1700能够执行图1至图14的方法中由终端设备执行的各个步骤，为了避免重复，此处不再详述。终端设备1700包括：发送单元1710和接收单元1720，
所述发送单元1710用于向接入网设备发送注册请求消息，所述注册请求消息用于请 求更新所述终端设备的注册区域；所述接收单元1720用于从所述接入网设备接收第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
图18是本申请又一实施例的接入网设备1800的示意性框图。应理解，接入网设备1800能够执行图1至图14的方法中由接入网设备执行的各个步骤，为了避免重复，此处不再详述。接入网设备例如可以是前文中的源接入网设备或者第二接入网设备，接入网设备1800包括：处理单元1810和通信单元1820，
所述接入网设备1800可以为目标接入网设备，通信单元1820用于接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求所述终端设备从所述源接入网设备切换至所述目标接入网设备。处理单元1810用于获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
所述接入网设备1800可以是源接入网设备，处理单元1810用于生成切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备，所述切换请求消息中包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片；所述通信单元1820用于向所述目标接入网设备发送所述切换请求消息。
或者，接入网设备1800可以是第二接入网设备，处理单元1810用于生成第一寻呼消息，所述第一寻呼消息对应于终端设备，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；通信单元1820用于向第一接入网设备发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
图19是本申请又一实施例的核心网设备1900的示意性框图。应理解，核心网设备1900能够执行图1至图14的方法中由核心网设备执行的各个步骤，为了避免重复，此处不再详述。核心网设备1900包括：处理单元1910和通信单元1920，
所述处理单元1910用于生成第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；所述通信单元1920用于向接入网设备发送所述第一寻呼消息。
图20是本申请实施例的终端设备2000的示意性框图。应理解，终端设备2000能够执行图1至图14的方法中由终端设备执行的各个步骤，为了避免重复，此处不再详述。终端设备2000包括：处理单元2010和通信单元2020，
所述处理单元2010用于生成第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；所述通信单元2020用于向接入网设备发送所述第三消息。
图21是本申请实施例的接入网设备2100的示意性框图。应理解，接入网设备2100能够执行图1至图14的方法中由接入网设备执行的各个步骤，为了避免重复，此处不再详述。接入网设备例如可以是前文中的接入网设备、目标接入网设备、源接入网设备、第一接入网设备或者第二接入网设备。接入网设备2100包括：
存储器2110，用于存储程序；
通信接口2120，用于和其他设备进行通信；
处理器2130，用于执行存储器2110中的程序，当所述程序被执行时，
所述接入网设备2100可以为目标接入网设备，所述处理器2130用于通过所述通信接口2120接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求所述终端设备从所述源接入网设备切换至所述目标接入网设备。以及通过所述通信接口2120获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述处理器2130用于通过所述通信接口2120接收第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、服务质量流标识(quality of service flow identifier,QoS flow ID,QFI)、第五代移动通信技术服务质量标识(5th generation quality of service identifier,5G QoS ID,5QI)5QI、数据网络名称(data network name,DNN)；以及用于在接收所述第一寻呼消息之后，通过所述通信接口2120向终端设备发送第二寻呼消息。
或者，所述接入网设备2100可以为上述第一接入网设备，所述处理器2130用于通过所述通信接口2120向第二接入网设备发送获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；以及用于通过所述通信接口2120从所述第二接入网设备接收获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述接入网设备2100可以为上述第二接入网设备，所述处理器2130用于通过所述通信接口2120从第一接入网设备接收获取终端设备上下文请求消息，所述获取终端设备上下文请求消息用于请求终端设备的上下文，其中，所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备；以及用于通过所述通信接口2120向所述第一接入网设备发送获取终端设备上下文响应消息，所述获取终端设备上下文响应消息包括所述终端设备支持的网络切片选择辅助信息，所述网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述处理器2130用于通过所述通信接口2120从终端设备接收第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；以及用于通过所述通信接口2120向核心网设备发送第四消息，所述第四消息包括所述服务请求消息。
或者，所述接入网设备2100可以是源接入网设备，所述处理器2130用于生成切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备，所述切换请求消息中包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片；以及用于通过所述通信接口2120向所述目标接入网设备发送所述切换请求消息。
或者，接入网设备2100可以是第二接入网设备，所述处理器2130用于生成第一寻呼消息，所述第一寻呼消息对应于终端设备，所述第一寻呼消息中包括第一信息，所述第一 信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；以及用于通过所述通信接口2120向第一接入网设备发送所述第一寻呼消息，其中所述第一接入网设备为所述终端设备当前驻留的接入网设备，所述第二接入网设备为所述终端设备上次驻留的接入网设备。
应理解，图21所示的接入网设备可以是芯片或电路，或者其他类型的接入网设备。例如可设置在接入网设备内的芯片或电路。进一步地，上述通信接口2120也可以与收发器互换。收发器包括接收器和发送器。再进一步地，该接入网设备2100还可以包括总线系统。
其中，处理器2130、存储器2110、接收器和发送器通过总线系统相连，处理器2130用于执行该存储器2110存储的指令，以控制接收器接收信号，并控制发送器发送信号，完成本申请通信方法中网络设备的步骤。其中，接收器和发送器可以为相同或不同的物理实体。为相同的物理实体时，可以统称为收发器。所述存储器2110可以集成在所述处理器2130中，也可以与所述处理器2130分开设置。
作为一种实现方式，接收器和发送器的功能可以考虑通过收发电路或者收发专用芯片实现。处理器2130可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的终端设备。即将实现处理器2130，接收器和发送器功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器2130、接收器和发送器的功能。
图22是本申请实施例的核心网设备2200的示意性框图。应理解，核心网设备2200能够执行图1至图14的方法中由核心网设备执行的各个步骤，为了避免重复，此处不再详述。核心网设备2200包括：
存储器2210，用于存储程序；
通信接口2220，用于和其他设备进行通信；
处理器2230，用于执行存储器2210中的程序，当所述程序被执行时，
所述处理器2230用于通过所述通信接口2220从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；以及用于通过所述通信接口2220向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
或者，所述处理器2230用于通过所述通信接口2220从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；以及用于通过所述通信接口2220向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
或者，所述处理器2230用于生成第一寻呼消息，所述第一寻呼消息中包括第一信息，所述第一信息包括以下至少一项：网络切片的信息、QFI、5QI、ARP、DNN；以及用于通过所述通信接口2220向接入网设备发送所述第一寻呼消息。
应理解，图22所示的核心网设备可以是芯片或电路，或者其他类型的核心网设备。例如可设置在核心网设备内的芯片或电路。进一步地，上述通信接口2220也可以与收发器互换。收发器包括接收器和发送器。再进一步地，该终端设备2200还可以包括总线系 统。
其中，处理器2230、存储器2210、接收器和发送器通过总线系统相连，处理器2230用于执行该存储器2210存储的指令，以控制接收器接收信号，并控制发送器发送信号，完成本申请通信方法中网络设备的步骤。其中，接收器和发送器可以为相同或不同的物理实体。为相同的物理实体时，可以统称为收发器。所述存储器2210可以集成在所述处理器2230中，也可以与所述处理器2230分开设置。
作为一种实现方式，接收器和发送器的功能可以考虑通过收发电路或者收发专用芯片实现。处理器2230可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的核心网设备。即将实现处理器2230，接收器和发送器功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器2230、接收器和发送器的功能。
图23是本申请实施例的终端设备2300的示意性框图。应理解，终端设备2300能够执行图1至图14的方法中由第一终端设备执行的各个步骤，为了避免重复，此处不再详述。终端设备2300包括：
存储器2310，用于存储程序；
通信接口2320，用于和其他设备进行通信；
处理器2330，用于执行存储器2310中的程序，当所述程序被执行时，
所述处理器2330用于通过所述通信接口2320向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；以及通过所述通信接口2320从所述接入网设备接收第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
或者，所述处理器2330用于生成第三消息，所述第三消息包括服务请求消息，所述服务请求消息用于请求所述终端设备从空闲态转换为连接态，所述第三消息还包括以下至少一种：所述终端设备支持的网络切片选择辅助信息、单网络切片选择辅助信息；以及通过所述通信接口2320向接入网设备发送所述第三消息。
应理解，图23所示的终端设备可以是芯片或电路，或者其他类型的终端设备。例如可设置在终端设备内的芯片或电路。进一步地，上述通信接口2320也可以与收发器互换。收发器包括接收器和发送器。再进一步地，该终端设备2300还可以包括总线系统。
其中，处理器2330、存储器2310、接收器和发送器通过总线系统相连，处理器2330用于执行该存储器2310存储的指令，以控制接收器接收信号，并控制发送器发送信号，完成本申请通信方法中网络设备的步骤。其中，接收器和发送器可以为相同或不同的物理实体。为相同的物理实体时，可以统称为收发器。所述存储器2310可以集成在所述处理器2330中，也可以与所述处理器2330分开设置。
作为一种实现方式，接收器和发送器的功能可以考虑通过收发电路或者收发专用芯片实现。处理器2330可以考虑通过专用处理芯片、处理电路、处理器或者通用芯片实现。
作为另一种实现方式，可以考虑使用通用计算机的方式来实现本申请实施例提供的终端设备。即将实现处理器2330，接收器和发送器功能的程序代码存储在存储器中，通用处理器通过执行存储器中的代码来实现处理器2330、接收器和发送器的功能。
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 (26)

  1. 一种通信方法，其特征在于，包括：
    目标接入网设备接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备；
    所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  2. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述目标接入网设备向所述核心网设备发送路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备；
    所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括：所述目标接入网设备从所述核心网设备接收路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
  3. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述目标接入网设备向核心网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；
    所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括：
    所述目标接入网设备从核心网设备接收第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
  4. 如权利要求3所述的方法，其特征在于，所述方法还包括：
    在发送所述注册请求消息之前，所述目标接入网设备从所述终端设备接收所述注册请求消息；
    在接收所述第一消息之后，所述目标接入网设备向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息。
  5. 如权利要求1所述的方法，其特征在于，所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。
  6. 如权利要求5所述的方法，其特征在于，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
  7. 如权利要求1所述的方法，其特征在于，所述目标接入网设备获取所述终端设备支持的网络切片选择辅助信息，包括：
    所述目标接入网设备从核心网设备获取所述终端设备支持的网络切片选择辅助信息。
  8. 如权利要求7所述的方法，其特征在于，所述终端设备支持的网络切片选择辅助信息为所述核心网设备更新的所述终端设备支持的网络切片选择辅助信息。
  9. 一种通信方法，其特征在于，包括：
    核心网设备接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备；
    所述核心网设备向所述目标接入网设备发送所述终端设备支持的网络切片选择辅助 信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  10. 如权利要求9所述的方法，其特征在于，所述终端设备支持的网络切片选择辅助信息为所述核心网设备更新的所述终端设备支持的网络切片选择辅助信息。
  11. 一种通信方法，其特征在于，包括：
    核心网设备从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；
    所述核心网设备向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  12. 一种通信方法，其特征在于，包括：
    核心网设备从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；
    核心网设备向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
  13. 一种通信方法，其特征在于，包括：
    终端设备向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；
    所述终端设备从所述接入网设备接收第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
  14. 一种接入网设备，其特征在于，所述接入网设备为目标接入网设备，包括：
    通信接口，
    存储器，用于存储指令，
    处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述通信接口接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至所述目标接入网设备；
    获取所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  15. 如权利要求14所述的设备，其特征在于，所述处理器还用于通过所述通信接口向所述核心网设备发送路径转移请求消息，所述路径转移请求消息用于请求将所述终端设备从所述源接入网设备切换至所述目标接入网设备；在所述获取所述终端设备支持的网络切片选择辅助信息方面，所述处理用于通过所述通信接口从所述核心网设备接收路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息。
  16. 如权利要求14所述的设备，其特征在于，所述处理器还用于通过所述通信接口向核心网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；在所述获取所述终端设备支持的网络切片选择辅助信息方面，所述处理器用于通过所述通信接口从核心网设备接收第一消息，所述第一消息包括注册接受消息和所述终端设备 支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
  17. 如权利要求16所述的设备，其特征在于，所述处理器还用于在发送所述注册请求消息之前，通过所述通信接口从所述终端设备接收所述注册请求消息；以及在接收所述第一消息之后，通过所述通信接口向所述终端设备发送第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息。
  18. 如权利要求14所述的设备，其特征在于，所述切换请求消息包括所述终端设备支持的网络切片选择辅助信息。
  19. 如权利要求18所述的设备，其特征在于，所述切换请求消息中还包括所述终端设备的注册区域信息，所述注册区域信息用于指示所述终端设备对应的跟踪区域。
  20. 如权利要求14所述的设备，其特征在于，所述处理器具体用于从核心网设备获取所述终端设备支持的网络切片选择辅助信息。
  21. 如权利要求20所述的设备，其特征在于，所述终端设备支持的网络切片选择辅助信息为核心网设备更新的所述终端设备支持的网络切片选择辅助信息。
  22. 一种核心网设备，其特征在于，包括：
    通信接口，
    存储器，用于存储指令，
    处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    接收源接入网设备发送的切换请求消息，所述切换请求消息用于请求终端设备从所述源接入网设备切换至目标接入网设备；
    向所述目标接入网设备发送所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  23. 如权利要求22所述的方法，其特征在于，所述终端设备支持的网络切片选择辅助信息为所述核心网设备更新的所述终端设备支持的网络切片选择辅助信息。
  24. 一种核心网设备，其特征在于，包括：
    通信接口，
    存储器，用于存储指令，
    处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述通信接口从目标接入网设备接收路径转移请求消息，所述路径转移请求消息用于请求将终端设备从源接入网设备切换至所述目标接入网设备；
    通过所述通信接口向所述目标接入网设备发送路径转移响应消息，所述路径转移响应消息包括所述终端设备支持的网络切片选择辅助信息，所述终端设备支持的网络切片选择辅助信息用于指示所述终端设备支持的网络切片。
  25. 一种核心网设备，其特征在于，包括：
    通信接口，
    存储器，用于存储指令，
    处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述通信接口从目标接入网设备接收注册请求消息，所述注册请求消息用于请求更新终端设备的注册区域；
    通过所述通信接口向所述目标接入网设备发送第一消息，所述第一消息包括注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
  26. 一种终端设备，其特征在于，包括：
    通信接口，
    存储器，用于存储指令，
    处理器，与所述存储器和所述通信接口分别相连，用于执行所述存储器存储的所述指令，以在执行所述指令时执行如下步骤：
    通过所述通信接口向接入网设备发送注册请求消息，所述注册请求消息用于请求更新所述终端设备的注册区域；
    通过所述通信接口从所述接入网设备接收第二消息，所述第二消息包括所述注册接受消息和所述终端设备支持的网络切片选择辅助信息，所述注册接受消息用于响应所述注册请求消息。
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