WO2023065865A1 - 一种通信方法及设备 - Google Patents

一种通信方法及设备 Download PDF

Info

Publication number
WO2023065865A1
WO2023065865A1 PCT/CN2022/117363 CN2022117363W WO2023065865A1 WO 2023065865 A1 WO2023065865 A1 WO 2023065865A1 CN 2022117363 W CN2022117363 W CN 2022117363W WO 2023065865 A1 WO2023065865 A1 WO 2023065865A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
terminal device
information
configuration information
relay
Prior art date
Application number
PCT/CN2022/117363
Other languages
English (en)
French (fr)
Inventor
孙海洋
余芳
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.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Publication of WO2023065865A1 publication Critical patent/WO2023065865A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H04W72/563—Allocation or scheduling criteria for wireless resources based on priority criteria of the wireless resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present application relates to the technical field of communication, and in particular to a communication method and device.
  • multiple terminal devices Due to the limited transmission capability of a single terminal device, in some communication scenarios, it may be necessary for multiple terminal devices to combine and coordinate transmission to complete corresponding services. For example, in a large uplink offload scenario, multiple terminal devices are required to respectively send and receive service data of different parts of the same service to implement service transmission. For another example, in a high-reliability business scenario, multiple terminal devices or relay devices accessed by terminal devices can copy business data into multiple copies for transmission, so as to prevent the loss of business data of a certain communication link from affecting the reliability of the business .
  • the two terminal devices that need cooperative communication are likely to be within the common coverage of the two base stations (for example, the edge of the base station's coverage), therefore, the two terminal devices are likely to access different base stations, and the packet data convergence protocol (PDCP) layer between different base stations is difficult to communicate with each other, resulting in the inability to realize cooperative communication between the two, which in turn affects the service transmission effect of the entire terminal equipment combination, and ultimately affects Realization of business.
  • PDCP packet data convergence protocol
  • the present application provides a communication method and device, which are used to ensure that multiple terminal devices requiring cooperative communication can access the same base station.
  • the embodiment of the present application provides a communication method, which can be applied to network elements with access and mobility management functions.
  • the method will be described below by taking AMF as an example.
  • the method includes the following steps:
  • the AMF After the AMF receives the registration request from the first terminal device through the first base station, it determines the combination configuration information; wherein, the first base station is the base station accessed by the first terminal device; the combination configuration information is used to indicate the The terminal equipment combination signed by the first terminal equipment, the multiple target terminal equipment included in the terminal equipment combination, the multiple target terminal equipment including the first terminal equipment; when the terminal equipment combination included When the second base station accessed by the second terminal device is different from the first base station, the AMF instructs the first terminal device to access the second base station.
  • the access and mobility management functional network element in the core network may instruct the first terminal device to access the second base station.
  • the AMF may instruct the first terminal device to access the second base station in the following manner:
  • the AMF sends a registration rejection message to the first terminal device, where the registration rejection message includes the information of the second base station.
  • the registration rejection message may also include a rejection reason value.
  • the cause value is used to notify the first terminal device that it is not accessing under the same base station as other target terminal devices in the terminal device combination (rejected). At this time, the first terminal device may determine that it needs to access through other base stations according to the cause value.
  • Manner 2 The AMF sends information for redirecting the first terminal device to the second base station to the first base station.
  • the AMF can instruct the first terminal device to access the second base station, or redirect the first terminal device to the second base station through the first base station.
  • the information of the second base station is identification information of the second base station, or identification information of a cell managed by the second base station;
  • the information redirected to the second base station is any of the following: identification information of the second base station; identification information of a cell managed by the second base station; a radio frequency selection priority index, wherein, in the In the radio frequency selection priority index, the frequency or access technology used by the second base station has the highest priority.
  • the AMF when the information used to redirect the first terminal device to the second base station is the radio frequency selection priority index, when sending the Before redirecting the first terminal device to the information of the second base station, the AMF may also obtain the radio frequency selection priority index through the following steps:
  • the AMF sends a policy association request to a policy control function network element; wherein, the policy association request includes the combined configuration information; and receives a policy association response from the policy control function network element, wherein the policy association The response includes the radio frequency selection priority index.
  • the AMF can obtain the radio frequency selection priority index from the policy control function network element.
  • the policy association response further includes an indication indicating that the relay mode is Layer 2 relay; the AMF may also send the first terminal device, the first base station, the At least one of the second base stations sends the indication for indicating that the relay mode is Layer 2 relay.
  • the AMF can also obtain the relay mode of the first terminal device from the policy control function network element, and send an indication of the relay mode to the first terminal device, the first base station, At least one of the second base stations, so that the first terminal device can use the relay mode to access the second base station.
  • the AMF may also send a redirection indication to the first base station, so that the first base station redirects the first terminal device according to the redirection indication.
  • the AMF may also send an indication to the second base station to instruct the second base station not to redirect the first terminal device to another base station.
  • the indication may also be called an indication of prohibiting reselection, an indication of prohibiting redirection, or an indication of prohibiting switching.
  • the second base station may no longer initiate a cell reselection process for the first terminal device according to the reselection prohibition indication; or
  • the configuration in the cell reselection configuration information prevents the first terminal device from reselecting to cells managed by other base stations.
  • the cell reselection configuration information only carries the information of the cell managed by the second base station; or the cell reselection configuration information carries information of multiple cells, but the reselection priority of the cell managed by the second base station is the highest , so that the second base station can preferentially provide the access service for the first UE.
  • the AMF may also send a policy association request to the policy control function network element; wherein, the policy association request includes the combination configuration information and the first terminal Device location indication information, the location indication information of the first terminal device is used to indicate the location of the first terminal device; the AMF receives a policy association response from the policy control function network element; wherein, the policy The association response includes an indication for indicating that the relay mode is Layer 2 relay; the AMF sends the indication for at least one of the first terminal device, the first base station, and the second base station to Indicates that the relay mode is Layer 2 relay.
  • the AMF can also obtain the relay mode of the first terminal device from the policy control function network element, and send an indication of the relay mode to the first terminal device, the first base station, At least one of the second base stations, so that the first terminal device can use the relay mode to access the second base station.
  • the AMF may, but is not limited to, determine combined configuration information in the following manner:
  • Mode 1 sending the information of the first terminal device to a unified data management network element; receiving subscription information from the unified data management network element, wherein the subscription information includes the combined configuration information;
  • Method 2 Determine the combination configuration information stored locally
  • Way 3 Obtain the combined configuration information from other network elements with access and mobility management functions.
  • the AMF can flexibly acquire the combination configuration information of the terminal device combination to which the first terminal device belongs through various methods.
  • the embodiment of the present application provides a communication method, which can be applied to a network element with a policy control function.
  • the method will be described below by taking PCF as an example. The method includes the following steps:
  • the PCF receives the policy association request from the access and mobility management functional network element; determines the combination configuration information, where the combination configuration information is used to indicate the first terminal device
  • the contracted terminal device combination, the multiple target terminal devices included in the terminal device combination, the multiple target terminal devices include the first terminal device; the PCF sends the access and mobility management function network Sending a policy association response; wherein, the policy association response includes a radio frequency selection priority index, and in the radio frequency selection priority index, the second base station (the registered target terminal device in the terminal device combination) uses The frequency or access technology has the highest priority, where the combination of terminal devices corresponds to the frequency or access technology used by the second base station.
  • the frequencies or access technologies corresponding to multiple terminal device combinations can be saved in the PCF, and the combination configuration can be determined after the combination configuration information of the terminal device combination to which the first terminal device belongs is obtained during the registration process of the first terminal device.
  • the terminal device combination indicated by the information corresponds to a frequency or an access technology. Since the registered second terminal device also uses the method provided by the embodiment of this application to access the second base station, the frequency or access technology corresponding to the terminal device combination indicated by the combination configuration information is the frequency or access technology used by the second base station. frequency or access technology.
  • the PCF can save the frequency or access technology corresponding to the terminal device combination, so that the terminal devices in the terminal device combination access the same base station using the frequency or access technology.
  • the core network can select the priority index through the radio frequency to control the UEs belonging to the UE group that needs cooperative communication to access the same base station, so as to ensure the cooperative communication effect of the UE group and finally ensure the realization of the entire service.
  • the PCF may, but is not limited to, determine combined configuration information in the following manner:
  • Mode 1 determining the combined configuration information stored locally
  • Mode 2 sending the information of the first terminal device to a network element of the unified database; receiving subscription information from the network element of the unified data repository, wherein the subscription information includes the combined configuration information;
  • Mode 3 Obtain the combined configuration information from the policy association request.
  • the PCF may also acquire location indication information of the first terminal device accessed by the first terminal device, where the location indication information of the first terminal device is used to indicate the The location of the first terminal device; and according to the combined configuration information and the location indication information of the first terminal device, determine that the relay mode that the first terminal device should adopt is Layer 2 relay; the policy association response also includes an indication for indicating that the relay mode is Layer 2 relay.
  • the PCF can preferentially configure a layer 2 relay relay mode for the first terminal device according to the combined configuration information and the location indication information of the first terminal device.
  • the core network can ensure that the first terminal device can access through the same base station as other terminal devices in the same group through the method provided by the embodiment of the present application, or directly indicate it by indicating the relay mode of Layer 2 relay
  • the first terminal device and other terminal devices in the same combination access the same base station, thereby improving the data transmission efficiency and resource utilization of the mobile communication network, and also eliminating some unnecessary attempts (attempting to access through layer 3 relays) ).
  • the indicated relay mode indicated by the relay mode indication generated by the PCF is the preferred or required relay mode for the first terminal device.
  • the embodiment of the present application provides a communication method, which can be applied to a terminal device, and the method will be described below using a first terminal device as an example.
  • the method includes the following steps:
  • the first terminal device sends a registration request to the access and mobility management functional network element through the accessed first base station; then the first terminal device receives a registration rejection message from the access and mobility management functional network element, Wherein, the registration rejection message includes information of the second base station; and the first terminal device accesses the second base station according to the information of the second base station.
  • the access and mobility management functional network element in the core network may instruct the first terminal device to access the second base station.
  • the information of the second base station is identification information of the second base station, or identification information of a cell managed by the second base station.
  • the first terminal device may also receive a registration request from the access and mobility management function network element.
  • An indication of the network element for indicating that the relay mode is Layer 2 relay; in this case, when the first terminal device accesses the second base station, it can use Layer 2 relay to access The second base station.
  • the access and mobility management function network element can also control and configure the relay mode of the first terminal device during the registration process of the first terminal device.
  • the embodiment of the present application provides a communication method, which can be applied to the first base station, and can specifically include the following steps:
  • the access and mobility management functional network element in the core network may instruct the first base station to redirect the first terminal device to the second base station.
  • the information used to redirect the first terminal device to the second base station is any of the following: identification information of the second base station; Cell identification information; a radio frequency selection priority index, wherein the frequency or access technology used by the second base station has the highest priority in the radio frequency selection priority index.
  • the method further includes: the first base station receiving a redirection indication from the access and mobility management functional network element; in this case, the first base station may The redirection instruction is used to redirect the first terminal device to the second base station.
  • the method may further include: determining that the frequency or access technology with the highest priority in the radio frequency selection priority index is different from the frequency or access technology used by the first base station .
  • the embodiment of the present application provides a method for determining a relay mode of a terminal device, which can be applied to network elements with access and mobility management functions.
  • the method will be described below using AMF as an example. The method includes the following steps:
  • the AMF After the AMF receives the registration request from the first terminal device through the first base station, it determines the location indication information of the first terminal device; the AMF sends a policy association request to the policy control function network element, wherein the policy association request Including location indication information of the first terminal device; the AMF receives a measurement association response from the policy control function network element, wherein the policy association response includes a relay mode indication for indicating a relay mode; The AMF may send the relay mode indication to the first terminal device or the first base station.
  • the relay mode indicated by the relay mode indication may be Layer 2 relay or Layer 3 relay.
  • the PCF can configure a relay mode for the first terminal device according to the location indication information of the first terminal device.
  • the relay mode of the first terminal device is Layer 2 relay
  • the core network can ensure that the first terminal device and other terminal devices in the same group can access through the same base station through the method provided by the embodiment of this application. , or directly instruct the first terminal device to access the same base station with other terminal devices in the same group by indicating the relay mode of Layer 2 relay, so as to improve the data transmission efficiency and resource utilization of the mobile communication network, and save Some unnecessary attempts (attempt to access through layer 3 trunks) were eliminated.
  • the indicated relay mode indicated by the relay mode indication generated by the PCF is the preferred or required relay mode for the first terminal device.
  • the location indication information of the first terminal device may include: information about the first base station accessed by the first terminal device, and/or physical location information of the first terminal device .
  • the information of the first base station is used to indicate that the first terminal device is located within the coverage of the first base station, which may include, but is not limited to, the identifier of the first base station, the physical location information of the first base station, the The identity of the cell managed by the first base station accessed by the first UE and the like.
  • the AMF may also obtain combination configuration information of the terminal device combination to which the first terminal device belongs, and include the combination configuration information in the policy association request.
  • the policy control network element can determine the location of the first terminal device based on the location indication information of other registered terminal devices in the terminal device combination and the location indication information of the first terminal device. following way.
  • the AMF may, but not limited to, obtain the combination configuration information in the following manner:
  • Mode 1 sending the information of the first terminal device to a unified data management network element; receiving subscription information from the unified data management network element, wherein the subscription information includes the combined configuration information;
  • Method 2 Determine the combination configuration information stored locally
  • Way 3 Obtain the combined configuration information from other network elements with access and mobility management functions.
  • the AMF can flexibly acquire the combination configuration information of the terminal device combination to which the first terminal device belongs through various methods.
  • the embodiment of the present application provides a method for determining a relay mode of a terminal device, and the method can be applied to a network element with a policy control function.
  • the following uses PCF as an example to describe the method. The method includes the following steps:
  • the PCF receives a policy association request from the AMF, wherein the policy association request includes location indication information of the first terminal device; the PCF determines the terminal to which the first terminal device belongs Combination configuration information of the device combination; the PCF determines the relay mode of the first terminal device according to the combination configuration information and the location indication information of the first terminal device; the PCF sends a policy association to the AMF A response, wherein the policy association response includes a relay mode indication for indicating the relay mode of the first terminal device.
  • the relay mode indicated by the relay mode indication may be layer 2 relay or layer 3 relay.
  • the PCF can configure a relay mode for the first terminal device according to the location indication information of the first terminal device.
  • the relay mode of the first terminal device is Layer 2 relay
  • the core network can ensure that the first terminal device and other terminal devices in the same group can access through the same base station through the method provided by the embodiment of this application. , or directly instruct the first terminal device to access the same base station with other terminal devices in the same group by indicating the relay mode of Layer 2 relay, so as to improve the data transmission efficiency and resource utilization of the mobile communication network, and save Some unnecessary attempts (attempt to access through layer 3 trunks) were eliminated.
  • the indicated relay mode indicated by the relay mode indication generated by the PCF is the preferred or required relay mode for the first terminal device.
  • the location indication information of the first terminal device may include: information about the first base station accessed by the first terminal device, and/or physical location information of the first terminal device .
  • the information of the first base station is used to indicate that the first terminal device is located within the coverage of the first base station, which may include, but is not limited to, the identifier of the first base station, the physical location information of the first base station, the The identity of the cell managed by the first base station accessed by the first UE and the like.
  • the PCF may also, but not limited to, acquire the combined configuration information in the following manner:
  • Mode 1 determining the combined configuration information stored locally
  • Mode 2 sending the information of the first terminal device to a network element of the unified database; receiving subscription information from the network element of the unified data repository, wherein the subscription information includes the combined configuration information;
  • Mode 3 Obtain the combined configuration information from the policy association request.
  • the PCF may preferentially configure an L2 relay relay mode for the first UE according to the combined configuration information and the location indication information of the first UE.
  • the AMF or PCF in the core network can ensure that the first UE and other UEs in the same group can access through the same base station through the methods provided in the above embodiments, or directly indicate by indicating the relay mode of the L2 relay
  • the first UE accesses the same base station as other UEs in the same combination, thereby improving the data transmission efficiency and resource utilization of the mobile communication network, and also saving some unnecessary attempts (trying to access through the L3 relay).
  • the indicated relay mode indicated by the relay mode indication generated by the PCF is the preferred or required relay mode for the first UE.
  • the PCF may preferentially configure an L2 relay relay mode for the first UE according to the combined configuration information and the location indication information of the first UE, including:
  • the PCF determines the position indication information of other registered target terminal devices (hereinafter referred to as the second terminal device) in the terminal device combination indicated by the combination configuration information, and then according to the position indication information of the first terminal device and the second terminal device
  • the location indication information of the second terminal device to determine whether the first terminal device and the second terminal device can access through the same base station; when it is judged that the two can access through the same base station, determine the relay mode of the first terminal device It is L2 relay.
  • the PCF may determine that the first terminal device (optionally, the second terminal device device) can be accessed through L2 relay.
  • the embodiment of the present application provides a communication device, including a unit for performing each step in the above first aspect to the sixth aspect.
  • the embodiment of the present application provides a communication device, including at least one processing element and at least one storage element, wherein the at least one storage element is used to store programs and data, and the at least one processing element is used to execute the above-mentioned The methods provided in the first aspect to the sixth aspect.
  • the embodiment of the present application further provides a computer program, which, when the computer program is run on a computer, causes the computer to execute the method provided in any one of the above aspects.
  • the embodiment of the present application further provides a computer storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer is made to execute the method provided in any one of the above aspects.
  • the embodiment of the present application further provides a chip, the chip is used to read the computer program stored in the memory, and execute the method provided in any one of the above aspects.
  • an embodiment of the present application further provides a chip system, where the chip system includes a processor, configured to support a computer device to implement the method provided in any one of the above aspects.
  • the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • FIG. 1 is a schematic structural diagram of a mobile communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic structural diagram of another mobile communication system provided by an embodiment of the present application.
  • FIG. 3A is a schematic structural diagram of a mobile communication system using an L2 relay scheme provided by an embodiment of the present application
  • FIG. 3B is a schematic structural diagram of another mobile communication system using an L2 relay relay solution provided by the embodiment of the present application.
  • FIG. 4A is a schematic diagram of a communication scenario of a large uplink offload service provided by an embodiment of the present application
  • FIG. 4B is a schematic diagram of a highly reliable business scenario provided by the embodiment of the present application.
  • FIG. 4C is a schematic diagram of another highly reliable service scenario provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a relationship between a remote UE, a relay UE, and a mobile communication network provided by an embodiment of the present application;
  • FIG. 6 is a flowchart of a communication method provided by an embodiment of the present application.
  • FIG. 7 is a flow chart of another communication method provided by the embodiment of the present application.
  • FIG. 8 is a flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 9 is a flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 10 is a flowchart of another communication method provided by the embodiment of the present application.
  • FIG. 11 is a flow chart of a method for determining a relay mode of a UE provided in an embodiment of the present application
  • FIG. 12 is a flow chart of another method for determining a relay mode of a UE provided in an embodiment of the present application.
  • FIG. 13 is a structural diagram of a communication device provided by an embodiment of the present application.
  • FIG. 14 is a structural diagram of a communication device provided by an embodiment of the present application.
  • the present application provides a communication method and device, which are used to ensure that multiple terminal devices requiring cooperative communication can access the same base station.
  • the method and the device are conceived based on the same technology. Since the principle of solving the problem of the method and the device is similar, the implementation of the device and the method can be referred to each other, and the repetition will not be repeated.
  • a base station is a device that connects a terminal device to a wireless network in a communication system.
  • a base station may also be called a network device, a radio access network (radio access network, RAN) node (or device), an access network (access network, AN) node (or device), or called an access point (access point, AP).
  • radio access network radio access network
  • RAN radio access network
  • AN access network
  • AP access point
  • Examples of some base stations are: new generation Node B (generation Node B, gNB), transmission reception point (transmission reception point, TRP), evolved Node B (evolved Node B, eNB), radio network controller (radio network controller, RNC), node B (Node B, NB), access point (access point, AP) base station controller (base station controller, BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB), or base band unit (base band unit, BBU), enterprise LTE discrete narrowband aggregation (Enterprise LTE Discrete Spectrum Aggregation, eLTE-DSA) base station, etc.
  • generation Node B generation Node B
  • TRP transmission reception point
  • radio network controller radio network controller
  • node B Node B, NB
  • access point access point
  • AP base station controller
  • base station controller, BSC
  • the base station may include a centralized unit (centralized unit, CU) node and a distributed unit (distributed unit, DU) node.
  • CU centralized unit
  • DU distributed unit
  • a terminal device is a device that provides voice and/or data connectivity to users.
  • the terminal equipment may also be called user equipment (user equipment, UE), mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) and so on.
  • the terminal device may be a handheld device with a wireless connection function, various vehicle-mounted devices, a roadside unit, and the like.
  • examples of some terminal devices are: mobile phone (mobile phone), tablet computer, notebook computer, palmtop computer, mobile Internet device (mobile internet device, MID), intelligent sales terminal (point of sale, POS), wearable device, Virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control (industrial control), wireless terminals in self driving (self driving), remote medical surgery (remote medical surgery)
  • Wireless terminals in smart grid wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, various Smart meters (smart water meters, smart electricity meters, smart gas meters), on-board electronic control units (electronic control unit, ECU), etc., on-board computers, on-board cruise systems, telematics boxes (T-BOX), etc.
  • the relay mode is a mode in which the terminal device accesses the mobile communication network through the relay device. From the perspective of the protocol stack, the relay methods are mainly divided into: layer zero relay (L0 relay), layer one relay (L1 relay), layer two relay (L2 relay), and layer three relay (L3 relay). ).
  • L0 relay layer zero relay
  • L1 relay layer one relay
  • L2 relay layer two relay
  • L3 relay layer three relay
  • the relay device between the terminal device and the base station is a traditional repeater.
  • the relay device can directly amplify and forward all received signals.
  • the relay device between the terminal device and the base station can perform fast Fourier inverse transformation on the received signal, and then amplify and forward the sampled data.
  • the repeater can be regarded as an enhanced repeater, capable of proper power control and frequency selective amplification.
  • L2 relay on the basis of L1 relay, the relay device between the terminal device and the base station can also decode and verify the received data, and encode it again. It has an independent MAC layer function and has partial resource allocation. Function, which can flexibly schedule and control users.
  • L2 relay the terminal device and the base station can communicate through MAC addressing.
  • the PDCP layer of the base station can sort, combine, and deduplicate the data packets, while the core network does not perceive the relay device.
  • L3 relay on the basis of L2 relay, the relay device between the terminal device and the base station introduces the function of the IP layer, and the communication is realized through IP routing, and the core network can perceive the relay device.
  • the relay device in L3 relay can be regarded as the base station of wireless backhaul, with a complete network layer protocol.
  • relay modes involved in the embodiment of this application are L2 relay and L3 relay.
  • a plurality referred to in this application refers to two or more than two. At least one means one or more.
  • the communication method provided by the embodiment of the present application is applicable to a mobile communication system, and the architecture of the mobile communication system is shown in FIG. 1 and FIG. 2 .
  • Fig. 1 is the system architecture based on the reference point
  • Fig. 2 is the system architecture based on the service interface.
  • the mobile communication system includes three parts: terminal equipment, mobile communication network and data network (data network, DN).
  • terminal equipment mobile communication network
  • data network data network
  • Terminal equipment referred to as UE for short, is an entity capable of receiving and transmitting wireless signals on the user side, and needs to access DN through a mobile communication network to realize UE services.
  • the UE may be various devices that provide voice and/or data connectivity for users, which is not limited in this application.
  • DN also called packet data network (PDN)
  • PDN packet data network
  • a variety of services can be deployed on the DN, which can provide data and/or voice services for the UE.
  • the mobile communication network can access at least one DN, and the same DN can also be accessed by at least one mobile communication network.
  • the DN may be Internet (Internet), IP Multi-media Service (IMS) network, some application-specific data network, Ethernet, IP local network, etc., which is not limited in this application.
  • IMS IP Multi-media Service
  • the mobile communication network deployed and maintained by operators, provides access services and end-to-end connection services for UEs.
  • the UE can access the DN through the mobile communication network to realize specific services.
  • the mobile communication network may further include two parts: a (wireless) access network ((radio) access network, (R)AN) and a core network (core network, CN).
  • R radio access network
  • CN core network
  • the (R)AN is mainly responsible for the wireless access function of the UE, and the function of the (R)AN can be specifically implemented by the base station.
  • the base station is an entity capable of receiving and transmitting wireless signals on the network side, and is responsible for providing wireless access-related services for UEs within its coverage area, realizing physical layer functions, resource scheduling and wireless resource management, and Quality of Service (QoS) ) management, radio access control, user plane data forwarding and mobility management functions.
  • QoS Quality of Service
  • the base station and the UE implement air interface transmission through the Uu interface.
  • the CN is responsible for connecting the UE to different data networks according to the call request or service request sent by the UE through the access network, as well as services such as charging, mobility management, and session management.
  • CN can be divided into control plane (control plane, CP) and user plane (user plane, UP).
  • control plane control plane
  • user plane user plane
  • the network elements responsible for the control plane function in the CN may be collectively referred to as the control plane network element
  • the network elements responsible for the user plane function may be collectively referred to as the user plane network element.
  • the functions of the main network elements in the core network are specifically introduced below.
  • the user plane network element that is, the user plane function (UPF) network element, referred to as UPF, is mainly responsible for forwarding and receiving user plane data of the UE.
  • the user plane network element can receive user plane data from the DN and transmit it to the UE through the base station; the user plane network element can also receive user plane data from the UE through the base station and forward it to the DN.
  • the transmission resources and scheduling functions of the user plane network element providing services for the UE are managed and controlled by the control plane network element.
  • Control plane network elements include: access and mobility management function (access and mobility management function, AMF) network element, session management function (session management function, SMF) network element, policy control function (policy control function, PCF) network element , authentication server function (authentication server function, AUSF) network element, network exposure function (network exposure function, NEF) network element, unified database (unified data repository, UDR) network element, unified data management (unified data management, UDM) network element and application function (application function, AF) network element, etc.
  • AMF access and mobility management function
  • SMF session management function
  • policy control function policy control function
  • PCF policy control function
  • authentication server function authentication server function, AUSF
  • network exposure function network exposure function
  • NEF network exposure function
  • UDR unified data repository
  • UDM unified data management
  • application function application function, AF
  • the AMF network element which can be referred to as AMF for short, is mainly responsible for mobility management, access authentication/authorization, and signaling processing in the mobile communication network, such as: access control, UE location update, UE registration, attachment and detachment , and functions such as selecting SMF.
  • AMF is also responsible for transferring user policies between UE and PCF.
  • the SMF network element which may be referred to as SMF for short, is mainly responsible for session management in the mobile communication network, such as session establishment, modification and release, and the like.
  • the functions of the SMF include: UPF selection, UPF redirection, Internet Protocol (internet protocol, IP) address allocation, bearer establishment, modification and release, and QoS control.
  • the PCF network element which can be referred to as PCF for short, is mainly responsible for supporting and providing a unified policy framework to control network behavior, providing policy rules to other control plane network elements, and being responsible for obtaining policy-related user subscription information.
  • the AUSF network element which may be referred to as AUSF for short, is mainly responsible for providing an authentication function and supporting authentication of 3GPP access and Non-3GPP access.
  • the NEF network element which can be referred to as NEF for short, mainly supports the secure interaction between the mobile communication network and third-party applications, and can safely expose network capabilities and events to third parties to enhance or improve application service quality.
  • the mobile communication network can also safely obtain relevant data from a third party through the NEF network element to enhance the intelligent decision-making of the network.
  • the UDR network element which may be referred to as UDR for short, is mainly responsible for storing subscription data, policy data, application data and other types of data of the UE.
  • the UDM network element which can be referred to as UDM for short, is mainly responsible for storing and managing UE subscription data, user access authorization, generating authentication credentials, user identification processing (such as storing and managing user permanent identity identification, etc.) and other functions.
  • the AF network element which can be referred to as AF, mainly transmits the requirements of the application side to the network side, and supports the interaction with other network elements in the core network to provide services, such as affecting data routing decisions, policy control functions, or providing third-party services to the network side. some services.
  • the AF network element can be a third-party functional entity, or an application service deployed by an operator.
  • the NSSF network element which may be referred to as NSSF for short, is mainly responsible for the selection of network slices.
  • the above network elements in the CN may be network elements implemented on dedicated hardware, software instances running on dedicated hardware, or virtualized on a virtualization platform (such as a cloud platform). instance of the function.
  • the embodiment of the present application does not limit the distribution form of each network element in the communication system.
  • each of the above network elements may be deployed in different physical devices, or multiple network elements may be integrated in the same physical device.
  • FIG. 1 also shows the interactive relationship and corresponding interfaces among various network functional entities in the mobile communication system.
  • Figure 2 also shows the service interfaces adopted between some network functional entities in the mobile communication system.
  • the mobile communication system shown in FIG. 1 or FIG. 2 does not constitute a limitation of the mobile communication system to which the embodiment of the present application is applicable. Therefore, the communication method provided by the embodiment of the present application can also be applied to communication systems of various standards, such as: long term evolution (long term evolution, LTE) communication system, fifth generation (The 5th Generation, 5G) communication system, sixth generation (The 6th Generation, 6G) communication system and future communication system.
  • LTE long term evolution
  • 5G Fifth generation
  • 6th Generation, 6G sixth generation
  • FIG. 1 or FIG. 2 does not limit the communication scenarios of the mobile communication system.
  • the present application may also be applicable to various roaming scenarios.
  • each network element may have other names;
  • the physical device can also have other names.
  • UE can also use L2 relay relay mode to access base stations through relay nodes (also called relay devices). Therefore, the channel transmission quality can be effectively improved, and the power consumption of the UE can be reduced. That is, the UE can access the relay node through the relay interface, and the relay node can perform air interface transmission with the base station through the traditional Uu interface.
  • the relay node may be a UE in a physical form, or may be other devices, which is not limited in this application.
  • the relay interface between the UE and the relay node may be a short-distance service communication interface 5 (ProSe communication 5, PC5), a WIFI interface, a Bluetooth interface, etc., which is not limited in this application.
  • the UE When the UE accesses the mobile communication network through a relay node, the UE can also be called a remote UE (remote UE) for short; and when the relay node is a UE, the relay node can be called a middle UE Following the UE (relay UE), the subsequent embodiments of the present application only use the relay node as the relay UE as an example for illustration.
  • the architecture of the mobile communication system adopting the L2 relay relay scheme may be shown in Fig. 3A and Fig. 3B.
  • the relay UE can forward the uplink and downlink data of the remote UE according to the configuration of the access stratum layer (AS layer), so that the remote UE can access the base station.
  • AS layer access stratum layer
  • the control plane protocol stack includes at least the following protocol layers: physical (physical, PHY) layer, medium access control (medium access control, MAC) layer, radio link control (radio link control, RLC) layer and PDCP layer, Service data adaptation protocol (service data adaptation protocol, SDAP) layer;
  • the control plane protocol stack includes at least the following protocol layers: PHY layer, MAC layer, RLC layer, PDCP layer, radio resource control (radio resource control, RRC) layer.
  • Each UE can implement communication services based on the architecture of the mobile communication system shown in Figures 1 to 3B. However, limited by the transmission capability of a single UE, in some communication scenarios, multiple UEs may need to communicate cooperatively to complete certain tasks. specific business.
  • Example 1 In the scenario of a large uplink offload service (taking extended reality (XR) service as an example) shown in Figure 4A, the mobile communication system can divide the XR service data generated by the service end—XR glasses into two parts (the first service data and the second service data shown in the figure), then the first service data is sent to the base station through UEa, and the second service data is sent to the base station through UEb.
  • any UE can directly access the base station or use the L2 relay scheme to access the base station through a relay node.
  • the XR service data can be distributed at the PDCP layer, RLC layer, or MAC layer of UEa.
  • the second service data is separated from the XR service data and sent to UEb, and UEb sends the second service data to the base station; and UEa directly sends the first service data to the base station.
  • the PDCP' layer in the figure represents an additional function of the PDCP layer, that is, uniformly sorts the PDCP layer data packets of UEa and the PDCP layer data packets of UEb.
  • the PDCP' layer may multiplex the PDCP layer of UEa, or multiplex the PDCP layer of UEb, which is not limited in this application.
  • UEa and UEb that need cooperative communication are configured in the same UE combination, so as to facilitate mobile communication network management.
  • any UE (UEa or UEb) in FIG. 4A can access the base station as a remote UE through a relay UE.
  • data transmission can also be realized through UE cooperation (UE cooperation, UC).
  • UC mode means that the UE's relay link (relay link) and direct link (direct link) are activated simultaneously to transmit service data.
  • the relay link refers to a communication link through which the UE accesses the base station through a relay node
  • the direct link refers to a communication link through which the UE directly accesses the base station.
  • the remote UE can continue to split (split) the part of the service data that needs to be transmitted through the direct link and at least one relay link (or through multiple relay link) to the base station.
  • the base station can aggregate the service data received on different communication links, and then send it externally.
  • the remote UE that needs cooperative communication and its relay UE should also be configured in the same UE combination, so as to facilitate mobile communication network management.
  • Example 2 In the high-reliability service scenario shown in FIG. 4B , there are multiple communication links between the service end and the base station.
  • the service end is a UE, as a remote UE, the service end can use the L2 relay scheme to access the base station through the relay UE1 and the relay UE2.
  • the remote UE may perform duplication of the service data, and then transmit the service data to the base station through at least two communication links among the direct link, the relay link 1 and the relay link 2 respectively.
  • the base station may select only one of the communication links (for example, the communication link with the highest transmission quality) to receive service data, or receive service data in multiple communication links at the same time and select one of the service data to send externally.
  • the remote UE that needs cooperative communication and its relay UE should also be configured in the same UE combination, so as to facilitate mobile communication network management.
  • Example 3 In the high-reliability service scenario shown in Figure 4C, the service end does not have the function of establishing a connection with the base station (that is, the service end is not a UE). Therefore, the service end can establish a connection with multiple UEs, and the multiple UEs can Access the base station separately. As shown in FIG. 4C , the service end can copy the generated service data, and then transmit them to the base station through the three communication links of UEa-UEc respectively. Similar to the operation of the base station in the scenario shown in FIG. 4B , the base station can select only one of the communication links to receive service data, or receive service data in multiple communication links at the same time and select one of the service data to send externally. In this scenario, UEa-UEc that need cooperative communication should be configured in the same UE combination, so as to facilitate mobile communication network management.
  • any UE (UEa, UEb, or UEc) in FIG. 4C may access the base station as a remote UE through a relay UE.
  • the UE can directly access the base station, data transmission can also be realized through UC. That is, the remote UE can continue to copy the service data to be transmitted into multiple copies, and then transmit them to the base station respectively through the direct link and at least one relay link (or through multiple relay links).
  • the remote UE that needs cooperative communication and its relay UE should also be configured in the same UE combination to facilitate mobile communication network management.
  • both the remote UE and the relay UE can directly access the base station through the Uu interface. Therefore, the relationship between the remote UE, the relay UE and the mobile communication network is shown in FIG. 5 .
  • the core network equipment serving the remote UE and the core network equipment serving the relay UE may be all the same network elements, or may be all different network elements, or may be partly the same network elements, This application is not limited to this.
  • the DN1 accessed by the remote UE and the DN2 accessed by the relay UE may also be the same or different DNs.
  • the multiple UEs should access the same base station. Furthermore, because the PDCP layers between different base stations are difficult to communicate with each other, when multiple UEs that need cooperative communication access the base station using the L2 relay relay mode, the multiple UEs must access the same base station. Otherwise, collaborative communication cannot be realized.
  • two UEs in a UE combination requiring cooperative communication may be within the common coverage of two base stations, and therefore, the two UEs may access different base stations, resulting in a gap between the two UEs.
  • Cooperative communication cannot be realized between UEs, which will affect the cooperative communication effect of the UE combination, and ultimately affect the realization of the entire service.
  • this embodiment of the present application provides a communication method, which can be applied to the mobile network shown in Figure 1-3B and Figure 5 in the communication system. Referring to the flowchart shown in FIG. 6, the method will be described in detail below.
  • the first UE sends a registration request to the AMF through the first base station.
  • the AMF receives the registration request from the first UE through the first base station.
  • the first UE may, but not limited to, access the first base station through procedures such as network search, cell reselection, cell handover, inter-system handover, random access, and the like.
  • the AMF determines combination configuration information, wherein the combination configuration information is used to indicate the UE combination subscribed by the first UE, the multiple target UEs included in the UE combination, and the multiple target UEs include The first UE.
  • the combination configuration information may include information (such as identification information) of each target UE in the UE combination.
  • the combination configuration information may also include group identification information of the UE combination. For example, if UE1 and UE2 are included in UE combination a, then the combination configuration information indicating UE combination a may include: group identification information (UE group IDa) of UE combination a, identification information of UE1 (UE ID1) and identification information of UE2 (UE2 ID2).
  • multiple target UEs included in the UE combination need cooperative communication to realize a specific service, and the UE combination may also be referred to as a UE cooperation group or a UE cooperation communication group.
  • the first UE and the second UE when the first UE and the second UE are allocated different service data of the same service, the first UE and the second UE should be configured into the same UE combination.
  • the first UE when the first UE needs to connect to the base station through a relay UE (taking UEa as an example) (optionally, the first UE can also connect to the base station through a direct link), the first UE and UEa should configure to the same UE group.
  • a relay UE taking UEa as an example
  • the first UE and UEa should configure to the same UE group.
  • the first UE when the first UE is respectively connected to the base station through multiple relay UEs (taking UEa and UEb as an example) (optionally, the first UE can also be connected to the base station through a direct link), the first UE , UEa and UEb should be configured in the same UE combination.
  • the AMF may, but not limited to, determine the combined configuration information in the following manner:
  • Mode 1 The AMF obtains the combination configuration information from the UDM through the subscription information acquisition process, and the specific steps are as follows:
  • the AMF sends the information of the first UE to the UDM; and then receives the subscription information of the first UE from the UDM.
  • the subscription information includes the combined configuration information.
  • the AMF may send a subscription information acquisition request to the UDM, where the subscription information acquisition request includes the information of the first UE.
  • the subscription information may be carried in the subscription information acquisition response, and sent to the AMF by the UDM.
  • the first UE may initiate multiple registration procedures.
  • the AMF may acquire the combined configuration information by using the first method each time after receiving the registration request from the first UE.
  • Manner 2 The AMF determines the combined configuration information stored locally.
  • the first UE may initiate multiple registration procedures, that is, the AMF may need to acquire the combined configuration information in each registration procedure.
  • the AMF may adopt the first method to obtain the combined configuration information, and then the AMF may save the combined configuration information of the first UE.
  • the AMF after the AMF receives the registration request of the first UE again, it can directly read the combined configuration information locally, that is, determine the combined configuration information through the second method.
  • the signaling interaction of the AMF can be reduced, so that when the first UE initiates the registration process again, the AMF can quickly determine the configuration information of the UE group to which the first UE belongs.
  • the time delay for other registered target UEs to access the same base station can finally improve the efficiency of the combined cooperative communication of the UE.
  • the AMF may be an AMF in a private network scenario (such as a factory), and therefore, the combined configuration information may be configured in the AMF.
  • the AMF may be configured with the combined configuration information when leaving the factory, or the combined configuration information may be stored in the AMF by the user, which is not limited in this application. Therefore, each time when the first UE initiates a registration procedure, the AMF may obtain the combined configuration information through the second method.
  • the AMF may acquire the combined configuration information from other AMFs.
  • the AMF may acquire the combined configuration information from the other AMF.
  • the other AMF may be a network element (such as MME, etc.) responsible for access and mobility management functions in the source mobile communication system.
  • the AMF can locally save the information of the base station accessed by the UE (for example, the identification information of the base station, the identification information of the tunnel connecting the base station, identification information of the cell managed by the base station, etc.).
  • the AMF performing mobility management on the first UE executes S603, it can determine the information of the base station accessed by the registered target UE in the UE combination indicated by the combination configuration information, and then determine Whether the first base station accessed by the first UE is the same as the base station accessed by the registered target UE.
  • the AMF responsible for the mobility management of the UE in the mobile communication network can store the information of the UE and the information of the base station the UE accesses in the Unified data storage network element.
  • the data storage network element may be an unstructured data storage function (unstructured data storage function, UDSF), UDM (assuming that the target UEs in the UE group to which the first UE belongs can select the same UDM), UDR (possibly storing this information into UDRs via NEF), or any of the PCFs, etc.
  • UDSF unstructured data storage function
  • UDM assuming that the target UEs in the UE group to which the first UE belongs can select the same UDM
  • UDR possibly storing this information into UDRs via NEF
  • PCFs any of the PCFs
  • the AMF performing mobility management on the first UE when the AMF performing mobility management on the first UE executes S603, it may acquire the registered target UE in the UE combination indicated by the combination configuration information from the unified data storage network element After that, the AMF judges whether the first base station accessed by the first UE is the same as the base station accessed by other registered target UEs.
  • the AMF may acquire the information of the base station accessed by the registered target UE in the UE combination indicated by the combination configuration information through the following steps:
  • the AMF may send the combination configuration information to the data storage network element, or the AMF may send the information of the target UE in the UE combination indicated by the combination configuration information to the data storage network element; then, the The AMF receives the information of the base station accessed by the registered target UE sent by the data storage network element.
  • the AMF that performs mobility management for the first UE when the AMF that performs mobility management for the first UE performs S603, it may also use the information of the first base station (optionally, may also include: the combined configuration information, or information about the target UE in the UE combination indicated by the combination configuration information) to the data storage network element.
  • the data storage network element judges whether the base station accessed by the first base station and other registered target UEs in the UE group are the same, and then feeds back the judgment result to the AMF. Further, when the data storage network element determines that the first base station is different from the base station accessed by other registered target UEs (second UE), it may also feed back information about the base station accessed by the second UE to the AMF ( That is, the information of the second base station).
  • the AMF may, but not limited to, instruct the first UE to access the second base station in the following manner:
  • Manner a the AMF sends a registration rejection message to the first UE, where the registration rejection message includes information about the second base station (referred to as first information for short). It should be noted that during specific implementation, the AMF may also notify the first UE through other messages, and here only a registration rejection message is taken as an example.
  • the first information may be but not limited to: identification information of the second base station, or identification information of a cell managed by the second base station, which is not limited in this application.
  • the registration rejection message may also include a rejection reason value.
  • the cause value is used to notify the first UE that the access is not performed under the same base station as other target UEs in the UE group (rejected). At this time, the first UE may determine that it needs to access through other base stations according to the cause value.
  • Manner b the AMF sends information (referred to as second information for short) for redirecting the first UE to the second base station to the first base station.
  • the second information may be, but not limited to, any of the following: identification information of the second base station; identification information of a cell managed by the second base station; radio frequency selection priority index ((RAT/frequency selection priority, RFSP) index), wherein, in the RFSP index, the frequency or access technology used by the second base station has the highest priority.
  • RAT/frequency selection priority, RFSP radio frequency selection priority index
  • the AMF may also send a redirection indication to the first base station, so that the first base station redirects the first UE to the second base station according to the redirection indication.
  • the second information (and the redirection indication) may be carried in a registration acceptance message. It should be noted that during specific implementation, the AMF may also notify the first UE through other messages, and here only the registration acceptance message is taken as an example.
  • the AMF may also send a message to the second base station to indicate that the second base station no longer redirects the UE to the second base station. Instructions to redirect the first UE to other base stations.
  • the indication may also be called an indication of prohibiting reselection, an indication of prohibiting redirection, or an indication of prohibiting handover, etc., and will be referred to as an indication of prohibiting reselection hereinafter.
  • the second base station may no longer initiate a cell reselection process for the first UE according to the reselection prohibition indication;
  • the configuration in the cell reselection configuration information prevents the first UE from reselecting to cells managed by other base stations.
  • the cell reselection configuration information only carries the information of the cell managed by the second base station; or the cell reselection configuration information carries information of multiple cells, but the reselection priority of the cell managed by the second base station is the highest , so that the second base station can preferentially provide the access service for the first UE.
  • the present application does not limit whether different target UEs belonging to the same UE group access the same cell. Therefore, when the second base station manages multiple cells, the cell reselection configuration information sent by the second base station to the first UE may include information about at least one cell or information about all cells managed by the second base station; and, when the cell When the reselection configuration information also includes cells managed by other base stations, the reselection priorities of the cells managed by the second base station are all higher than those of the cells managed by other base stations.
  • the AMF may also obtain the RFSP index through the following steps:
  • the AMF sends a policy association request to the PCF, wherein the policy association request includes the combined configuration information obtained by the AMF in S602.
  • the PCF After receiving the policy association request from the AMF, the PCF determines the frequency or access technology corresponding to the UE combination indicated by the combination configuration information.
  • the frequency or access technology corresponding to the UE combination indicated by the combination configuration information is the second base station Frequency or access technology used.
  • the frequency or access technology corresponding to multiple UE combinations may be stored in the PCF, and after receiving the combination configuration information, the frequency or access technology corresponding to the UE combination indicated by the combination configuration information may be determined.
  • the PCF generates the RFSP index according to the frequency or access technology corresponding to the UE combination indicated by the combination configuration information; the PCF sends a policy association response to the AMF, and the policy association response includes the Describe the RFSP index.
  • the RFSP index generated by the PCF indicates that frequency band A or access technology is included in the domain with the highest priority The index value corresponding to A.
  • the AMF receives the policy association response from the PCF.
  • the policy association request involved in the above steps may be a policy association establishment/modification request (for example, an access and mobility policy association establishment/modification request), and correspondingly, the policy association response may be a policy association establishment/modification request.
  • Modification response eg, access and mobility policy association establishment/modification response.
  • S604 The first UE accesses the second base station.
  • the first UE receives a registration rejection message from the AMF, where the registration rejection message includes the information of the second base station (ie, the first information). At this time, the first UE may access the second base station according to the first information.
  • the first information may be but not limited to: identification information of the second base station, or identification information of a cell managed by the second base station.
  • the first UE may screen currently accessible cells or base stations, and only select the cell or base station corresponding to the first information (that is, the cell managed by the second base station or the second base station).
  • the AMF sends the identity information (gNB ID 2) of the second base station to the first UE, then, the first UE only accesses the cell identity (for example, NR cell global identity (NR cell global identifier, NCGI) or NR radio access cell identity (NR cell identity, NCI)) contains the cell of gNB ID 2.
  • the cell identity for example, NR cell global identity (NR cell global identifier, NCGI) or NR radio access cell identity (NR cell identity, NCI)
  • NCGI includes NCI
  • NCI includes gNB ID.
  • the AMF sends to the first UE the identification information (NCGI 2) of the cell managed by the second base station, then the first UE accesses the cell whose identification is NCGI 2.
  • NCGI 2 the identification information
  • the first UE may continue to initiate a registration process to the AMF through the second base station.
  • Mode II Corresponding to mode b, after the first base station receives the information (that is, the second information) used to redirect the first UE to the second base station from the AMF, the first base station sends the A UE is redirected to the second base station.
  • the second information may be but not limited to any of the following: identification information of the second base station; identification information of a cell managed by the second base station; RFSP index, wherein, in the RFSP index , the frequency or access technology used by the second base station has the highest priority.
  • the first base station may also receive a redirection indication from the AMF, so that the first base station may, according to the redirection indication and the second information, send the The first UE is redirected to the second base station.
  • the AMF may also determine the relay mode of the first UE according to the combined configuration information, and the specific steps are as follows:
  • the AMF sends a policy association request to the PCF, where the policy association request includes the combined configuration information and the location indication information of the first UE.
  • the location indication information of the first UE is used to indicate the location of the first UE.
  • the location indication information of the first UE may include: information about the first base station accessed by the first UE, and/or physical location information of the first UE.
  • the information of the first base station is used to indicate that the first UE is located within the coverage of the first base station, which may but not limited to include the identifier of the first base station, the physical location information of the first base station, the An identifier of a cell managed by the first base station accessed by the first UE, and the like.
  • the PCF determines that the UE combination indicated by the combination configuration information can be accessed through the same base station according to the combination configuration information and the location indication information of the first UE, it determines that the first UE needs to use L2
  • the relay mode of the relay mode (such as L2 relay preference).
  • the PCF sends a policy association response to the AMF, wherein the policy association response includes an indication for indicating that the relay mode is L2 relay (subsequently may be referred to as a relay mode indication, for example, L2 relay tendency information (L2 relay preference)).
  • L2 relay tendency information L2 relay preference
  • the AMF receives the policy association response from the PCF.
  • the AMF sends the relay mode indication to the first UE and/or the second base station, so that the first UE accesses in an L2 relay mode.
  • the policy association request involved in the above steps may be a policy association establishment/modification request, and correspondingly, the policy association response may be a policy association establishment/modification response.
  • the policy association establishment/modification request in the above steps may include an access and mobility policy association establishment/modification request
  • the policy association establishment/modification response may include an access and mobility policy association establishment/modification response
  • the AMF may obtain specific policy information (ie, relay mode indication) from the PCF, and perform operations in this method when it is determined that the first UE can use the L2 relay.
  • the policy association establishment/modification request in the above steps may include a user equipment policy association establishment/modification request
  • the policy association establishment/modification response may include a user equipment policy association establishment/modification response
  • the AMF may obtain specific policy information (ie, relay mode indication) from the PCF, and deliver the policy information to the first UE, so as to instruct the first UE to select a relay mode according to the policy information.
  • the AMF can obtain the RFSP index and the relay mode indication from the PCF at the same time through a policy association process, that is, the policy association request in the above step a1 also includes the location indication information of the first UE, before step a3 Execute step b2, and the policy association response in steps a3 and a4 also includes a relay mode indication in addition to the RFSP index.
  • the AMF can perform the above method for each UE requesting registration to ensure UEs in the same UE group access the same base station.
  • An embodiment of the present application provides a communication method.
  • the AMF may instruct the first UE to access the second base station.
  • the AMF can control the UEs belonging to the UE combination that needs cooperative communication to be able to access the same base station, thereby ensuring the cooperative communication effect of the UE combination, and finally ensuring the realization of the entire service.
  • the present application also provides some embodiments, and these embodiments are also applicable to the mobile communication system shown in FIG. 1 to FIG. 3B and FIG. 5 .
  • Various embodiments are described below with reference to FIGS. 7-9 .
  • Embodiment 1 Refer to FIG. 7 .
  • the first UE After accessing the first base station, the first UE sends a registration request to the AMF through the first base station.
  • the AMF sends a subscription information acquisition request including the information of the first UE to the UDM, so as to request to acquire the subscription information of the first UE.
  • the UDM acquires the subscription information of the first UE according to the information of the first UE in the subscription information acquisition request; then the UDM returns the subscription information to the AMF.
  • the subscription information of the first UE includes, in addition to currently commonly used subscription data, combination configuration information of the UE group to which the first UE belongs.
  • the combination configuration information is used to indicate the UE combination subscribed by the first UE, and multiple target UEs included in the UE combination.
  • the AMF may adopt the two implementation manners recorded in S603 in the embodiment shown in FIG. 6 to execute S704.
  • S603 the description in S603, which will not be repeated here.
  • the AMF sends a registration rejection message to the first UE, where the registration rejection message includes the information of the second base station.
  • the reason value may also be rejected in the registration rejection message, where the reason value is used to notify the first UE that it is denied access (rejected of).
  • the information of the second base station may be but not limited to: identification information of the second base station, or identification information of a cell managed by the second base station.
  • the AMF determines that the second base station is a base station jointly accessed by the UE group to which the first UE belongs.
  • this embodiment does not limit the rules for the AMF to determine the base stations that the UE groups access together.
  • the AMF may determine the base station that the UE combination jointly accesses based on the order in which the target UEs in the UE combination access the base station, the load condition of the base station (such as the number of UEs accessed by the base station) and other rules.
  • the AMF can determine that the second base station is the base station that the UE group jointly accesses. At this time, the AMF can execute S705 instructs the first UE to access the second base station.
  • the AMF may determine that the first base station is the first base station. The UE combines the base stations that are accessed together, and at this time, the AMF may also notify the second UE to access the first base station.
  • the AMF may determine that the second base station is the base station jointly accessed by the UE combination, and the The AMF may instruct the first UE to access the second base station by performing S705.
  • the first UE may access the second base station according to the information of the second base station.
  • the first UE may access the second base station by using method I in S604 in the embodiment shown in FIG. 6 , which will not be repeated here.
  • the AMF can Send the information of the second base station to the first UE, so that the first UE accesses the second base station.
  • the AMF can control the UEs belonging to the UE combination that needs cooperative communication to be able to access the same base station, thereby ensuring the cooperative communication effect of the UE combination, and finally ensuring the realization of the entire service.
  • Embodiment 2 Refer to FIG. 8 .
  • S801-S804 are the same as S701-S704 in the first embodiment, the same steps can refer to each other, and will not be repeated here.
  • the AMF sends the information of the second base station to the first base station, so that the first base station redirects the first UE to the second base station.
  • the AMF may also send a redirection indication to the first base station.
  • the AMF may include the information of the second base station and the redirection indication (optional) in a registration accept message and send it to the first base station.
  • the information of the second base station may be but not limited to: identification information of the second base station, or identification information of a cell managed by the second base station.
  • the first base station may redirect the first UE to the second base station according to the received information of the second base station.
  • the second base station may send an AMF that provides services to the second base station (this embodiment assumes that the AMF that provides services to the first base station) The same as the AMF serving the second base station) feeds back a notification message to inform the AMF that the first UE has been successfully redirected to the second base station.
  • S807 After the first UE accesses the second base station, the AMF serving the first base station may also send a message to the second base station to indicate that the second base station no longer uses the first UE An indication to redirect to other base stations, that is, a reselection prohibition indication. It should be noted that S807 is an optional step.
  • the second base station may no longer initiate a cell reselection process for the first UE according to the prohibition of reselection indication; or when initiating a cell reselection process for the first UE, pass the cell reselection configuration information It is configured to prevent the first UE from reselecting to cells managed by other base stations.
  • the cell reselection configuration information only carries the information of the cell managed by the second base station; or the cell reselection configuration information carries information of multiple cells, but the reselection priority of the cell managed by the second base station is the highest , so that the second base station can preferentially provide the access service for the first UE.
  • the second base station when the second base station needs to redirect some UEs (for example, the load of the cell managed by the second base station is too high), the second base station will preferentially redirect the A UE that receives a reselection prohibition indication; or, the second base station may collectively redirect the same group of UEs, that is, may collectively redirect all accessed target UEs in the UE group to which the first UE belongs to the third
  • the network side such as AMF also needs to send the combination configuration information of the UE group to which the first UE belongs to the second base station).
  • the AMF can The information of the second base station is sent to the first base station, so that the first base station can redirect the first UE to the second base station.
  • the AMF can control the UEs belonging to the UE combination that needs cooperative communication to be able to access the same base station, thereby ensuring the cooperative communication effect of the UE combination, and finally ensuring the realization of the entire service.
  • Embodiment 1 and Embodiment 2 are both implemented in a scenario where there is a registered target UE in the UE group to which the first UE belongs when the first UE requests registration. Then, when the first UE requests registration, and there is no registered target UE in the UE group to which the first UE belongs, the mobile communication network may adopt a traditional registration procedure. Further, when multiple target UEs that access different base stations and belong to the same UE group all request registration from the AMF, and there is no other registered target UE in the UE group at this time, then the AMF can register among the multiple target UEs. Any one of the plurality of accessed base stations is selected as the base station jointly accessed by the UE group. Exemplarily, the AMF may adopt any of the following principles to select the base station that the UE combination accesses jointly from the multiple base stations:
  • Random selection select the base station with the largest number of currently accessing target UEs; select the base station whose distance to each target UE requesting registration is within a set range; select the base station with the shortest distance to each target UE requesting registration, etc.
  • Embodiment 3 Refer to FIG. 9 .
  • S901-S903 are the same as S701-S703 in the first embodiment, and the same steps can be referred to each other, and will not be repeated here.
  • the AMF sends a policy association request to the PCF, where the policy association request includes the acquired combination configuration information of the UE group to which the first UE belongs.
  • the PCF determines a frequency or an access technology corresponding to the UE combination indicated by the combination configuration information. Since other registered second UEs in the UE combination also access the second base station using the method provided in the embodiment of the present application, the frequency or access technology used by the second base station is the same as the frequency or access technology corresponding to the UE combination. The input technology is the same.
  • the PCF generates the RFSP index according to the frequency or access technology corresponding to the UE combination indicated by the combination configuration information. Wherein, in the RFSP index, the frequency or access technology corresponding to the UE combination has the highest priority.
  • the PCF sends a policy association response to the AMF, and the policy association response includes the RFSP index.
  • UEs in the same UE group can access the same base station using the frequency or access technology corresponding to the UE group.
  • the AMF sends the RFSP index to the first base station, so that the first base station can redirect the first UE to the second base station according to the RFSP index.
  • the AMF may also send a redirection indication to the first base station.
  • the AMF may include the RFSP index and the redirection indication (optional) in a registration accept message and send it to the first base station.
  • the first base station judges whether the frequency or access technology with the highest priority in the RFSP index is the same as the frequency or access technology used by the first base station (that is, judges whether the first base station and other registered UEs in the UE combination Whether the base station accessed by the second UE is the same), and when it is determined that the frequency or access technology with the highest priority in the RFSP index is different from the frequency or access technology used by the first base station, perform S908.
  • the first base station determines that the frequency or access technology with the highest priority in the RFSP index is the same as the frequency or access technology used by the first base station, there is no need to perform a redirection procedure.
  • the first base station redirects the first UE to the second base station (that is, the base station that uses the frequency or access technology corresponding to the UE combination).
  • S909 is the same as S807 in the second embodiment, the same steps can be referred to each other, and will not be repeated here.
  • Embodiment 4 Similar to Embodiment 3, the difference is that in this embodiment, the AMF may also determine that the frequency or access technology with the highest priority in the RFSP index is different from the first priority before performing S906. Whether the frequencies or access technologies used by the base stations are the same (that is, determine whether the base stations accessed by the first base station and other registered second UEs in the UE combination are the same), if not, perform S906, and if they are the same, do not need to perform S906.
  • S907 is an optional step.
  • Embodiment 5 Similar to Embodiment 3 or Embodiment 4, the difference is that after S903 and before S906 (for example, between S904 and S904), the AMF may also obtain the information of the UE group to which the first UE belongs. After combining the configuration information, judging whether the first base station accessed by the first UE is the same as the second base station accessed by other registered target UEs (that is, the second UE) in the UE combination indicated by the combination configuration information, For the specific process, reference may be made to the description in S603 in the embodiment shown in FIG. 6 , which will not be repeated here. Step S904 is executed when the AMF determines that the first base station is different from the second base station.
  • S907 is an optional step.
  • Embodiment 3 to Embodiment 5 in the process of the first UE requesting registration, if the first base station accessed by the first UE and the second base station accessed by the registered second UE in the UE group to which the first UE belongs at the same time, the first base station redirects the first UE to the second base station according to the RFSP index received from the AMF, where the frequency or access technology corresponding to the UE group to which the first UE belongs in the RFSP index (that is, the The frequency or access technology used by the second base station accessed by the registered second UE in the UE combination) has the highest priority.
  • the core network can control the UEs belonging to the UE combination that needs cooperative communication to access the same base station through the RFSP index, so as to ensure the cooperative communication effect of the UE combination and ultimately ensure the realization of the entire service.
  • this embodiment of the present application provides a communication method, which can be applied to the mobile network shown in Figure 1-3B and Figure 5 in the communication system. Referring to the flowchart shown in FIG. 10 , the method will be described in detail.
  • the first UE After the first UE accesses the first base station, the first UE sends a registration request to the AMF through the accessed first base station. The AMF receives the registration request from the first UE through the first base station.
  • the first UE may, but not limited to, access the first base station through procedures such as network search, cell reselection, cell handover, inter-system handover, random access, and the like.
  • the AMF sends a policy association request to the PCF.
  • the PCF receives a policy association request from the AMF.
  • the policy association request may include the information of the first UE.
  • the PCF may, but not limited to, acquire the combination configuration information of the UE combination to which the first UE belongs in the following two ways.
  • the PCF acquires the combined configuration information stored locally.
  • Method 2 Obtain the combined configuration information from the UDR.
  • the PCF sends a subscription information acquisition request including the information of the first UE to the UDR.
  • the UDR sends the subscription information of the first UE to the PCF, where the subscription information includes combination configuration information of the UE group to which the first UE belongs.
  • the AMF acquires the combination configuration information of the UE combination to which the first UE belongs.
  • the first UE may initiate multiple registration procedures. Therefore, the PCF may also acquire the combined configuration information from the UDR in the first UE first registration process using the second method above, and then the PCF may save the combined configuration information. In this way, when the first UE initiates the registration process again, the PCF can directly read the combined configuration information locally.
  • the PCF may also directly adopt method 1 to acquire combined configuration information of any UE.
  • S1004-S1008 are the same as S905-S909 in Example 3 shown in FIG. 9 , and the same steps can be referred to each other, and will not be repeated here.
  • the AMF may also determine whether the frequency or access technology with the highest priority in the RFSP index is the same as the frequency or access technology used by the first base station before performing S1005 ( That is, it is judged whether the base station accessed by the first base station and other registered second UEs in the UE combination are the same), if not, execute S1005, and if they are the same, execute S1005.
  • S1006 is an optional step.
  • the PCF may also determine whether the first base station accessed by the first UE is compatible with the combination configuration information Whether the second base station accessed by other registered target UEs (that is, the second UE) in the indicated UE combination is the same; when it is determined that the first base station is different from the second base station, step S1004 is executed.
  • S1006 is an optional step.
  • the PCF can save the information of the registered UE and the information of the base station accessed by the UE; that is, after any UE registers with the mobile communication network through the base station, the mobile communication network is responsible for the UE
  • the AMF of the mobility management can store the information of the UE and the information of the base station accessed by the UE in the PCF.
  • An embodiment of the present application provides a communication method.
  • the first base station may redirect the first UE to the second base station according to the RFSP index received from the AMF, where the frequency corresponding to the UE group to which the first UE belongs in the RFSP index Or the access technology (that is, the frequency or access technology used by the second base station accessed by the registered second UE in the UE combination) has the highest priority.
  • the core network can control the UEs belonging to the UE combination requiring cooperative communication to access the same base station through the RFSP index, thereby ensuring the cooperative communication effect of the UE combination and finally ensuring the realization of the entire service.
  • an embodiment of the present application further provides a method for determining a relay mode for a UE.
  • the method can be applied to the mobile communication systems shown in the above figures, and can be combined with the communication method provided in any embodiment or example. Referring to the flowchart shown in FIG. 11 , the method will be described in detail below.
  • S1101-S1103 are the same as S701-S703 in the example shown in FIG. 7 , and the same steps may refer to each other, and details are not repeated here.
  • the AMF sends a policy association request to the PCF, where the policy association request includes combined configuration information of the first UE and location indication information of the first UE.
  • the location indication information of the first UE may include: information of a first base station accessed by the first UE, and/or physical location information of the first UE.
  • the information of the first base station is used to indicate that the first UE is located within the coverage of the first base station, which may but not limited to include the identifier of the first base station, the physical location information of the first base station, the An identifier of a cell managed by the first base station accessed by the first UE, and the like.
  • the information of the first base station may be obtained by the AMF when the first UE accesses (or requests to register), for example, the AMF may use tunnel information between the first base station and the AMF , to determine the information of the first base station.
  • the physical location information of the first UE may be obtained by the AMF from a location management function (location management function, LMF), or obtained by the AMF according to the tracking area (tracking area, TA) where the first UE is located or obtained by the AMF performing mapping according to the cell identity of the cell where the first UE is located.
  • location management function location management function
  • TA tracking area
  • the PCF determines whether the first UE can pass through other registered target UEs in the UE combination indicated by the combination configuration information according to the combination configuration information and the location indication information of the first UE. Access to the same base station; if so, the PCF generates a relay mode indication (such as L2 relay preference information (L2 relay preference)) for indicating that the relay mode is L2 relay; otherwise, the PCF generates a relay mode indication for indicating the relay mode Indicates the relay mode of the L3 relay (L3 relay preference information (L3 relay preference)). The PCF sends a policy association response carrying a relay mode indication (L2/L3 relay tendency information) to the AMF.
  • a relay mode indication such as L2 relay preference information (L2 relay preference)
  • the PCF may preferentially configure an L2 relay relay mode for the first UE according to the combined configuration information and the location indication information of the first UE.
  • the AMF or PCF in the core network can ensure that the first UE and other UEs in the same group can access through the same base station through the methods provided in the above embodiments, or directly indicate by indicating the relay mode of the L2 relay
  • the first UE accesses the same base station as other UEs in the same combination, thereby improving the data transmission efficiency and resource utilization of the mobile communication network, and also saving some unnecessary attempts (trying to access through the L3 relay).
  • the indicated relay mode indicated by the relay mode indication generated by the PCF is the preferred or required relay mode for the first UE.
  • the AMF responsible for the mobility management of the UE may store the location indication information of the UE in the PCF.
  • the PCF executes S1105, it can indicate the location of other registered target UEs (hereinafter referred to as the second UE) in the UE combination indicated by the location indication information of the first UE and the UE combination indicated by the combination configuration information. information to determine whether the first UE and the second UE can access through the same base station.
  • the PCF may determine that the first UE (optionally, the second UE) can use the middle of the L2 relay access via follow-up.
  • the AMF responsible for the mobility management of the UE may store the location indication information of the UE in another identical data storage network element.
  • the data storage network element may be UDSF, UDM (assuming that the target UEs in the UE group to which the first UE belongs can select the same UDM), or UDR (these information may be stored in UDR through NEF) .
  • the PCF executes S1105, according to the combination configuration information, it can acquire other registered target UEs in the UE combination indicated by the combination configuration information (hereinafter referred to as the second UE for short) from the data storage network element. ) location indication information.
  • the PCF can judge whether the first UE can access through the same base station as the second UE according to the location indication information of the first UE and the location indication information of the second UE.
  • the specific judgment process please refer to The above implementation manners will not be repeated here.
  • the above two implementation manners do not limit the manner in which the PCF determines whether the first UE and the second UE can access through the same base station.
  • the PCF may also store the combined configuration information (or the registered second UE in the UE combination currently indicated by the combined configuration information) ID) and the location indication information of the first UE are sent to the data storage network element; the data storage network element can judge whether the first UE and the second UE can access through the same base station based on the received information, and report the judgment result The PCF is notified.
  • the specific determination process of the data storage network element reference may be made to the above-mentioned first implementation mode, which will not be repeated here.
  • the AMF sends the relay mode indication to the first UE and/or the first base station, so that the first UE can use the L2 relay or L3 relay indicated by the relay mode indication Connect to the network.
  • the AMF can use a traditional solution to perform subsequent processes, which will not be repeated here.
  • the first UE and/or the first base station perform corresponding steps according to the received relay mode indication, so that the first UE can access the L2 relay or L3 relay indicated by the relay mode indication network.
  • the first base station may further determine whether the first UE can use the relay mode indicated by the relay mode indication according to the capability of the first UE or the current network environment.
  • the first base station may also notify the first UE of the relay mode indication, or refuse The access of the first UE.
  • the first UE and/or the first base station may also feed back the execution result of the step in S1107 to the AMF, if the first UE adopts the relay mode indicated by the relay mode indication If access to the network fails, the AMF may also report the execution result to the PCF, so that the PCF generates a corresponding policy (for example, updating to another relay mode).
  • this embodiment of the present application also provides another method for determining the UE's relay mode.
  • This method can also be applied to the mobile communication systems shown in the above figures, and can be combined with the communication method provided by any embodiment or example. Referring to the flowchart shown in FIG. 12 , the method will be described in detail.
  • the embodiment shown in FIG. 12 is similar to the embodiment shown in FIG. 11 , except that the AMF no longer acquires the combination configuration information of the UE group to which the first UE belongs, but is determined by the PCF itself.
  • S1201-S1203b2 are basically the same as S1001-S1003b2 in the example shown in FIG. For reference, no more details here.
  • S1204-S1206 are the same as S1105-S1107 in the embodiment shown in FIG. 11, the same steps can be referred to, and will not be repeated here.
  • the embodiments shown in FIG. 11 and FIG. 12 of the present application respectively provide a method for determining the relay mode of the UE.
  • the core network can determine the relay mode of the first UE according to the combination configuration information of the UE group to which the first UE belongs and the location indication information of the first UE.
  • the PCF can preferentially configure the L2 relay relay mode for the first UE according to the combination configuration information of the UE combination to which the first UE belongs and the location indication information of the first UE.
  • the AMF or PCF in the core network can use the methods provided in the above embodiments to ensure that the target UEs in the UE group can access through the same base station, thereby improving the data transmission efficiency and resource utilization of the mobile communication network, and saving Some unnecessary attempts were made (attempt to access via L3relay).
  • AMF The relay mode indication of the first UE can be obtained through the policy association request process; and in the embodiment shown in FIG. 9 or FIG. 10 , the AMF can obtain the RFSP index through the policy association request process.
  • the AMF may acquire the subscription information of the first UE from the UDM through the subscription information acquisition process.
  • the PCF may obtain locally stored combination configuration information of the UE group to which the first UE belongs, or obtain the subscription information of the first UE from the UDR through a subscription information obtaining process. Therefore, when the embodiment shown in FIG. 11 or FIG. 12 is combined with any method in the embodiments shown in FIG. 6-FIG. 10, when the same process exists in both, the process can be reused to realize corresponding functions.
  • the embodiments shown in Figures 6-12 of this application are executed for the first UE, therefore, the information exchanged between different devices may include the information of the first UE to identify that the information is for First UE's. For example, registration request, policy association request, policy association response, subscription information acquisition request, and messages carrying some information or instructions provided by this application, etc.
  • the network side can further configure the combination configuration information of the UE combination Send to the corresponding base station (wherein, the AMF can obtain the combined configuration information as described in the above embodiment).
  • the base station needs to redirect some UEs (for example, the load of the cell managed by the base station is too high)
  • the base station can uniformly redirect the UEs in the same UE group, that is, redirect the UEs in the same UE group directed to the same new base station.
  • the new base station may also acquire the combined configuration information of the UE combination, for example, from the source base station or from the AMF).
  • each step involved in the above embodiments may be executed by a corresponding device, or may be executed by components such as a chip, a processor, or a chip system in the device, and the embodiments of the present application do not constituting a limit.
  • the foregoing embodiments are only described by taking execution by corresponding devices as examples.
  • each device involved in the above embodiments includes a corresponding hardware structure and/or software module for performing each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software with reference to the units and method steps of the examples described in the embodiments disclosed in the present application. Whether a certain function is executed by hardware or computer software drives the hardware depends on the specific application scenario and design constraints of the technical solution.
  • this embodiment of the present application also provides a communication device, which can be applied to the mobile communication system shown in FIG. 1 to FIG. 3B and FIG. 5 to implement the methods provided in the above embodiments.
  • the device includes a communication unit 1301 and a processing unit 1302 .
  • the communication unit 1301 is used to receive and send data.
  • the communication unit 1301 may be implemented through a physical interface, a communication module, a communication interface, and an input/output interface.
  • the communication device 1300 may be connected to a network cable or cable through the communication unit 1301 to establish a physical connection with other devices.
  • the communication device 1300 is applied to the AMF in the embodiment shown in FIGS. 6-10 , and the processing unit 1302 is configured to execute through the communication unit 1301:
  • the combination configuration information is determined; wherein, the first base station is a base station accessed by the first UE; the combination configuration information is used to indicate the first The UE group subscribed by the UE, the multiple target UEs included in the UE group, the multiple target UEs including the first UE; and the second UE accessed by the second UE included in the UE group When the base station is different from the first base station, instruct the first UE to access the second base station.
  • the processing unit 1302 when instructing the first UE to access the second base station based on the communication unit 1301, is specifically configured to:
  • the information of the second base station is identification information of the second base station, or identification information of a cell managed by the second base station;
  • the information used to redirect the first UE to the second base station is any of the following: identification information of the second base station; identification information of a cell managed by the second base station; radio frequency Selecting a priority index, wherein the frequency or access technology used by the second base station has the highest priority in the radio frequency selection priority index.
  • the processing unit 1302 is further configured to:
  • the policy association request includes The combined configuration information
  • the policy association response further includes an indication indicating that the relay mode is Layer 2 relay; the processing unit 1302 is further configured to:
  • processing unit 1302 is further configured to:
  • processing unit 1302 is further configured to:
  • processing unit 1302 is further configured to:
  • a policy association request is sent to the PCF through the communication unit 1301; wherein, the policy association request includes the combination configuration information and the location indication information of the first UE, and the first UE The location indication information is used to indicate the location of the first UE;
  • the policy association response includes an indication for indicating that the relay mode is Layer 2 relay;
  • processing unit 1302 determines the combined configuration information, it is specifically configured to:
  • the communication device 1300 is applied to the first UE in the embodiment shown in FIG. 6 or FIG. 7 , and the processing unit 1302 specifically executes through the communication unit 1301:
  • the registration rejection message includes information about the second base station
  • the information of the second base station is identification information of the second base station, or identification information of a cell managed by the second base station.
  • processing unit 1302 is further configured to:
  • processing unit 1302 accesses the second base station, it is specifically used to:
  • the communication device 1300 is applied to the first base station in any of the embodiments shown in FIG. 6 and FIGS. 8-10 , and the processing unit 1302 specifically executes through the communication unit 1301:
  • the information used to redirect the first UE to the second base station is any of the following: identification information of the second base station; identification information of a cell managed by the second base station; A radio frequency selection priority index, wherein the frequency or access technology used by the second base station has the highest priority in the radio frequency selection priority index.
  • processing unit 1302 is further configured to:
  • the processing unit 1302 when redirecting the first UE to the second base station, is specifically configured to:
  • processing unit 1302 is further configured to:
  • the information for redirecting the first UE to the second base station is a radio frequency selection priority index
  • determining the radio frequency The frequency or access technology with the highest priority in the priority index is selected to be different from the frequency or access technology used by the first base station.
  • the communication device 1300 is applied to the PCF in the embodiment shown in FIG. 6 , FIG. 9 or FIG. 10 , and the processing unit 1302 is configured to execute through the communication unit 1301:
  • the combination configuration information is used to indicate the UE combination subscribed by the first UE, the multiple target UEs included in the terminal device combination, and the multiple target UEs include the first a UE;
  • the policy association response includes a radio frequency selection priority index, and in the radio frequency selection priority index, the second base station (other registered target UEs in the UE combination)
  • the used frequency or access technology has the highest priority, wherein the UE combination corresponds to the frequency or access technology used by the second base station.
  • processing unit 1302 determines the combined configuration information, it is specifically configured to:
  • the method further includes:
  • the relay mode that the first terminal device should adopt is Layer 2 relay
  • the policy association response also includes an indication for indicating that the relay mode is Layer 2 relay.
  • each functional unit in each embodiment of the present application It can be integrated in one processing unit, or physically exist separately, or two or more units can be integrated in one unit.
  • the above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is realized in the form of a software function unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or part of the contribution to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) execute all or part of the steps of the methods in various embodiments of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (read-only memory, ROM), random access memory (random access memory, RAM), magnetic disk or optical disc and other media that can store program codes. .
  • this embodiment of the present application also provides a communication device, which can be applied to the mobile communication system shown in Figure 1-3B and Figure 5, to implement the method provided by the above embodiments, with The functions of the communication device 1300 provided in the above embodiments.
  • the communication device 1400 includes: a communication module 1401 , a processor 1402 , and a memory 1403 . Wherein, the communication module 1401 , the processor 1402 and the memory 1403 are connected to each other.
  • the communication module 1401 , the processor 1402 and the memory 1403 are connected to each other through a bus 1404 .
  • the bus 1404 may be a peripheral component interconnect standard (peripheral component interconnect, PCI) bus or an extended industry standard architecture (extended industry standard architecture, EISA) bus, etc.
  • PCI peripheral component interconnect
  • EISA extended industry standard architecture
  • the bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one thick line is used in FIG. 14 , but it does not mean that there is only one bus or one type of bus.
  • the communication module 1401 is used to receive and send data to realize communication with other devices in the mobile communication system.
  • the communication device 1400 is a core network device (such as AMF, PCF), or when the communication device 1400 is a base station and the base station communicates with the core network device, the communication module 1401 can physically Interfaces, communication modules, and input and output interfaces are realized.
  • the communication module 1401 may be implemented by a transceiver.
  • the processor 1402 is configured to implement the methods provided in the above embodiments. For specific functions, reference may be made to the descriptions in the above embodiments, and details are not repeated here.
  • the processor 1402 may be a central processing unit (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP, etc.
  • the processor 1402 may further include a hardware chip.
  • the aforementioned hardware chip may be an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof.
  • the above-mentioned PLD can be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL) or any combination thereof.
  • the processor 1402 realizes the above functions, it may be realized by hardware, and of course, it may also be realized by executing corresponding software by hardware.
  • the memory 1403 is used to store program instructions and the like.
  • the program instructions may include program codes including computer operation instructions.
  • the memory 1403 may include a random access memory (random access memory, RAM), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory.
  • the processor 1402 executes the program instructions stored in the memory 1403 to implement the above functions, thereby implementing the methods provided in the above embodiments.
  • an embodiment of the present application further provides a computer program, which, when the computer program is run on a computer, causes the computer to execute the method provided in the above embodiments.
  • the embodiments of the present application also provide a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a computer, the computer executes the method provided in the above embodiments .
  • the storage medium may be any available medium that can be accessed by a computer.
  • computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage media or other magnetic storage devices, or may be used to carry or store information in the form of instructions or data structures desired program code and any other medium that can be accessed by a computer.
  • an embodiment of the present application further provides a chip, the chip is used to read a computer program stored in a memory, and implement the method provided in the above embodiments.
  • an embodiment of the present application provides a chip system, where the chip system includes a processor, configured to support a computer device to implement the functions involved in the communication device in the above embodiments.
  • the chip system further includes a memory, and the memory is used to store necessary programs and data of the computer device.
  • the system-on-a-chip may consist of chips, or may include chips and other discrete devices.
  • the embodiments of the present application provide a communication method and device.
  • the AMF may instruct the first UE to A UE accesses the second base station.
  • the AMF can control the UEs belonging to the UE combination that needs cooperative communication to be able to access the same base station, thereby ensuring the cooperative communication effect of the UE combination, and finally ensuring the realization of the entire service.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions
  • the device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

本申请提供了一种通信方法及设备。在该方法中，在第一终端设备请求注册的过程中，若第一终端设备接入的第一基站与第一终端设备所属终端设备组合中的第二终端设备接入的第二基站不同时，核心网中的接入和移动性管理功能网元可以指示第一终端设备接入该第二基站。这样，核心网可以控制属于需要协作通信的终端设备组合中的终端设备能够接入到同一基站，从而可以保证该终端设备组合的协作通信效果，最终保证整个业务的实现。

Description

一种通信方法及设备
相关申请的交叉引用
本申请要求在2021年10月20日提交中国专利局、申请号为202111219477.5、申请名称为“一种通信方法及设备”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
本申请涉及通信技术领域，尤其涉及一种通信方法及设备。
背景技术
由于单个终端设备的传输能力有限，在一些通信场景中，可能需要多个终端设备组合并协作传输以完成相应的业务。例如，在大上行分流场景中，需要多个终端设备分别收发同一业务中不同部分的业务数据以实现业务传输。又例如，在高可靠业务场景中，多个终端设备或终端设备接入的中继设备可以将业务数据复制为多份进行传输，以防止某个通信链路的业务数据丢失影响业务的可靠性。
在实际场景中，需要协作通信的两个终端设备很可能会处于两个基站的共同覆盖范围内(例如基站覆盖范围内的边缘地带)，因此，这两个终端设备很有可能分别接入不同的基站，而不同基站之间的分组数据汇聚协议(packet data convergence protocol，PDCP)层很难互通，从而导致二者之间无法实现协作通信，进而影响整个终端设备组合的业务传输效果，最终影响业务的实现。
发明内容
本申请提供一种通信方法及设备，用于保证需要协作通信的多个终端设备能够接入同一基站。
第一方面，本申请实施例提供了一种通信方法，该方法可以应用于接入和移动性管理功能网元，下面以AMF为例对该方法进行说明。该方法包括以下步骤：
AMF通过第一基站接收来自第一终端设备的注册请求后，确定组合配置信息；其中，所述第一基站为所述第一终端设备接入的基站；所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；当所述终端设备组合中包含的第二终端设备接入的第二基站与所述第一基站不同时，所述AMF指示所述第一终端设备接入所述第二基站。
通过该方法，在第一终端设备请求注册的过程中，若第一终端设备接入的第一基站与第一终端设备所属终端设备组合中的第二终端设备接入的第二基站不同时，核心网中的接入和移动性管理功能网元可以指示第一终端设备接入该第二基站。通过该方法，核心网中的可以控制属于需要协作通信的终端设备组合中的终端设备能够接入到同一基站，从而可以保证该终端设备组合的协作通信效果，最终保证整个业务的实现。
在一种可能的设计中，所述AMF可以通过以下方式指示所述第一终端设备接入所述 第二基站：
方式一：所述AMF向所述第一终端设备发送注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息。可选的，所述注册拒绝消息中还可以包含拒绝原因值。该原因值用于通知所述第一终端设备由于没有和所在的终端设备组合内的其他目标终端设备在同一基站下接入(被拒绝的)。此时，所述第一终端设备可以根据该原因值判断需要通过其他基站接入。
方式二：所述AMF向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息。
通过该设计，所述AMF可以指示第一终端设备接入第二基站，或者通过第一基站将第一终端设备重定向到第二基站。
在一种可能的设计中，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息；所述用于将所述第一终端设备重定向到所述第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
在一种可能的设计中，当所述用于将所述第一终端设备重定向到所述第二基站的信息为所述无线频率选择优先级索引时，在向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息之前，所述AMF还可以通过以下步骤，获取所述无线频率选择优先级索引：
所述AMF向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息；以及接收来自所述策略控制功能网元的策略关联响应，其中，所述策略关联响应中包含所述无线频率选择优先级索引。
通过该设计，所述AMF可以从策略控制功能网元获取所述无线频率选择优先级索引。
在一种可能的设计中，所述策略关联响应中还包含用于指示中继方式为层二中继的指示；所述AMF还可以向所述第一终端设备、所述第一基站、所述第二基站中至少一项发送所述用于指示中继方式为层二中继的指示。
通过该方法，所述AMF还可以从策略控制功能网元获取所述第一终端设备的中继方式，并将该中继方式的指示发送给所述第一终端设备、所述第一基站、所述第二基站中的至少一项，以使所述第一终端设备可以采用该中继方式接入第二基站。
在一种可能的设计中，所述AMF还可以向所述第一基站发送重定向指示，以使所述第一基站根据该重定向指示，对所述第一终端设备进行重定向。
在一种可能的设计中，所述AMF还可以向所述第二基站发送用于指示所述第二基站不将所述第一终端设备重定向到其他基站的指示。该指示还可以称为禁止重选指示，禁止重定向指示，或禁止切换指示等。
通过该设计，当所述第一终端设备后续重定向到第二基站后，所述第二基站可以根据该禁止重选指示，不再针对第一终端设备发起小区重选流程；或者在针对第一终端设备发起小区重选流程时，通过小区重选配置信息中的配置使第一终端设备不再重选到其他基站管理的小区。例如，该小区重选配置信息中仅携带第二基站管理的小区的信息；或者该小区重选配置信息中携带多个小区的信息，但是所述第二基站管理的小区的重选优先级最高，这样可以使第二基站优先为第一UE提供接入服务。
在一种可能的设计中，所述AMF确定组合配置信息之后，还可以向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息和所述第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；所述AMF接收来自所述策略控制功能网元的策略关联响应；其中，所述策略关联响应中包含用于指示中继方式为层二中继的指示；所述AMF向所述第一终端设备、所述第一基站、所述第二基站中的至少一项发送所述用于指示中继方式为层二中继的指示。
通过该方法，所述AMF还可以从策略控制功能网元获取所述第一终端设备的中继方式，并将该中继方式的指示发送给所述第一终端设备、所述第一基站、所述第二基站中的至少一项，以使所述第一终端设备可以采用该中继方式接入第二基站。
在一种可能的设计中，所述AMF可以但不限于通过以下方式确定组合配置信息：
方式一：向统一数据管理网元发送所述第一终端设备的信息；接收来自所述统一数据管理网元的签约信息，其中，所述签约信息中包含所述组合配置信息；
方式二：确定本地保存的所述组合配置信息；
方式三：从其他接入和移动性管理功能网元获取所述组合配置信息。
通过该设计，所述AMF可以通过多种方式，灵活地获取第一终端设备所属终端设备组合的组合配置信息。
第二方面，本申请实施例提供了一种通信方法，该方法可以应用于策略控制功能网元，下面以PCF为例对该方法进行说明。该方法包括以下步骤：
在第一终端设备请求注册的过程中，PCF接收来自接入和移动性管理功能网元的策略关联请求；确定组合配置信息，其中，所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；所述PCF向所述接入和移动性管理功能网元发送策略关联响应；其中，所述策略关联响应中包含无线频率选择优先级索引，在所述无线频率选择优先级索引中第二基站(该终端设备组合中已注册的目标终端设备)所使用的频率或接入技术的优先级最高，其中，所述终端设备组合对应所述第二基站所使用的频率或接入技术。
在本方法中，PCF中可以保存多个终端设备组合对应的频率或接入技术，当第一终端设备注册过程中获取第一终端设备所属终端设备组合的组合配置信息后，可以确定该组合配置信息所指示的终端设备组合对应的频率或接入技术。由于已注册的第二终端设备也是采用本申请实施例提供的方法接入第二基站的，因此，该组合配置信息所指示的终端设备组合对应的频率或接入技术即第二基站所使用的频率或接入技术。
通过该方法，PCF可以通过保存终端设备组合对应的频率或接入技术，以使该终端设备组合中的终端设备接入使用该频率或接入技术的同一个基站。最终，核心网可以通过无线频率选择优先级索引，控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
可选的，所述PCF可以但不限于通过以下方式确定组合配置信息：
方式一：确定本地保存的所述组合配置信息；
方式二：向统一数据库网元发送所述第一终端设备的信息；接收来自所述统一数据存储库网元的签约信息，其中，所述签约信息中包含所述组合配置信息；
方式三：从所述策略关联请求中获取所述组合配置信息。
可选的，所述PCF在确定组合配置信息之后，还可以获取所述第一终端设备接入的第 一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；并根据所述组合配置信息和所述第一终端设备的位置指示信息，确定所述第一终端设备应采用的中继方式为层二中继；所述策略关联响应中还包含用于指示所述中继方式为层二中继的指示。
通过该设计，所述PCF可以根据所述组合配置信息和所述第一终端设备的位置指示信息，优先为所述第一终端设备配置层二中继的中继方式。这样，核心网可以通过本申请实施例提供的方法保证所述第一终端设备可以与同一组合中的其他终端设备通过同一基站接入，或者直接通过指示层二中继的中继方式指示来指示第一终端设备与同组合中的其他终端设备接入同一基站，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过层三中继接入)。总之，所述PCF生成的中继方式指示所指示的中继方式，为所述第一终端设备优选或需要使用的中继方式。
第三方面，本申请实施例提供了一种通信方法，该方法可以应用于终端设备，下面以第一终端设备为例对该方法进行说明。该方法包括以下步骤：
第一终端设备通过接入的第一基站向接入和移动性管理功能网元发送注册请求；然后所述第一终端设备接收来自所述接入和移动性管理功能网元的注册拒绝消息，其中，所述注册拒绝消息中包含第二基站的信息；所述第一终端设备根据所述第二基站的信息，接入所述第二基站。
通过该方法，在第一终端设备请求注册的过程中，若第一终端设备接入的第一基站与第一终端设备所属终端设备组合中的第二终端设备接入的第二基站不同时，核心网中的接入和移动性管理功能网元可以指示第一终端设备接入该第二基站。通过该方法，核心网中的可以控制属于需要协作通信的终端设备组合中的终端设备能够接入到同一基站，从而可以保证该终端设备组合的协作通信效果，最终保证整个业务的实现。
在一种可能的设计中，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息。
在一种可能的设计中，在通过接入的第一基站向接入和移动性管理功能网元发送注册请求之后，所述第一终端设备还可以接收来自所述接入和移动性管理功能网元的用于指示中继方式为层二中继的指示；在该情况下，所述第一终端设备在接入所述第二基站时，可以采用层二中继的中继方式接入所述第二基站。
通过该方法，接入和移动性管理功能网元还可以在第一终端设备注册过程中，控制和配置所述第一终端设备的中继方式。
第四方面，本申请实施例提供了一种通信方法，该方法可以应用于第一基站，具体可以包括以下步骤：
向接入和移动性管理功能网元转发第一终端设备的注册请求；然后接收来自所述接入和移动性管理功能网元的用于将所述第一终端设备重定向到第二基站的信息后，将所述第一终端设备重定向到所述第二基站。
通过本方法，在第一终端设备请求注册的过程中，若第一终端设备接入的第一基站与第一终端设备所属终端设备组合中的第二终端设备接入的第二基站不同时，核心网中的接入和移动性管理功能网元可以指示第一基站将第一终端设备重定向到该第二基站。通过该方法，核心网中的可以控制属于需要协作通信的终端设备组合中的终端设备能够接入到同一基站，从而可以保证该终端设备组合的协作通信效果，最终保证整个业务的实现。
在一种可能的设计中，所述用于将所述第一终端设备重定向到第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
在一种可能的设计中，所述方法还包括：所述第一基站接收来自所述接入和移动性管理功能网元的重定向指示；在该情况下，所述第一基站可以根据所述重定向指示，将所述第一终端设备重定向到所述第二基站。
在一种可能的设计中，当所述用于将所述第一终端设备重定向到第二基站的信息为无线频率选择优先级索引时，在所述第一基站将所述第一终端设备重定向到所述第二基站之前，所述方法还可以包括：确定所述无线频率选择优先级索引中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术不同。
第五方面，本申请实施例提供了一种确定终端设备的中继方式的方法，该方法可以应用于接入和移动性管理功能网元，下面以AMF为例对该方法进行说明。该方法包括以下步骤：
AMF通过第一基站接收来自第一终端设备的注册请求后，确定所述第一终端设备的位置指示信息；所述AMF向策略控制功能网元发送策略关联请求，其中，所述策略关联请求中包含所述第一终端设备的位置指示信息；所述AMF接收来自所述策略控制功能网元的测量关联响应，其中，所述策略关联响应中包含用于指示中继方式的中继方式指示；所述AMF可以向所述第一终端设备或所述第一基站发送所述中继方式指示。可选的，所述中继方式指示所指示的中继方式可以为层二中继或层三中继。
通过该方法，所述PCF可以根据所述第一终端设备的位置指示信息，为所述第一终端设备配置中继方式。这样，当第一终端设备的中继方式为层二中继时，核心网可以通过本申请实施例提供的方法保证所述第一终端设备可以与同一组合中的其他终端设备通过同一基站接入，或者直接通过指示层二中继的中继方式指示来指示第一终端设备与同组合中的其他终端设备接入同一基站，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过层三中继接入)。总之，所述PCF生成的中继方式指示所指示的中继方式，为所述第一终端设备优选或需要使用的中继方式。
在一种可能的设计中，所述第一终端设备的位置指示信息可以包含：所述第一终端设备接入的第一基站的信息，和/或，所述第一终端设备的物理位置信息。其中，所述第一基站的信息用于表示所述第一终端设备位于所述第一基站的覆盖范围内，其可以但不限于包含第一基站的标识、第一基站的物理位置信息、所述第一UE所接入的第一基站管理的小区的标识等。
在一种可能的设计中，所述AMF还可以获取所述第一终端设备所属终端设备组合的组合配置信息，并将所述组合配置信息携带所述策略关联请求中。
通过该设计，所述策略控制网元可以根据所述终端设备组合中的其他已注册终端设备的位置指示信息，以及所述第一终端设备的位置指示信息，判断所述第一终端设备的中继方式。
在一种可能的设计中，所述AMF可以但不限于通过以下方式获取所述组合配置信息：
方式一：向统一数据管理网元发送所述第一终端设备的信息；接收来自所述统一数据管理网元的签约信息，其中，所述签约信息中包含所述组合配置信息；
方式二：确定本地保存的所述组合配置信息；
方式三：从其他接入和移动性管理功能网元获取所述组合配置信息。
通过该设计，所述AMF可以通过多种方式，灵活地获取第一终端设备所属终端设备组合的组合配置信息。
第六方面，本申请实施例提供了一种确定终端设备的中继方式的方法，该方法可以应用于策略控制功能网元，下面以PCF为例对该方法进行说明。该方法包括以下步骤：
在第一终端设备请求注册的过程中，PCF接收来自AMF的策略关联请求，其中，所述策略关联请求中包含第一终端设备的位置指示信息；所述PCF确定所述第一终端设备所属终端设备组合的组合配置信息；所述PCF根据所述组合配置信息和所述第一终端设备的位置指示信息，确定所述第一终端设备的中继方式；所述PCF向所述AMF发送策略关联响应，其中，所述策略关联响应中包含用于指示所述第一终端设备的中继方式的中继方式指示。可选的，所述中继方式指示所指示的中继方式可以为层二中继或层三中继。
通过该方法，所述PCF可以根据所述第一终端设备的位置指示信息，为所述第一终端设备配置中继方式。这样，当第一终端设备的中继方式为层二中继时，核心网可以通过本申请实施例提供的方法保证所述第一终端设备可以与同一组合中的其他终端设备通过同一基站接入，或者直接通过指示层二中继的中继方式指示来指示第一终端设备与同组合中的其他终端设备接入同一基站，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过层三中继接入)。总之，所述PCF生成的中继方式指示所指示的中继方式，为所述第一终端设备优选或需要使用的中继方式。
在一种可能的设计中，所述第一终端设备的位置指示信息可以包含：所述第一终端设备接入的第一基站的信息，和/或，所述第一终端设备的物理位置信息。其中，所述第一基站的信息用于表示所述第一终端设备位于所述第一基站的覆盖范围内，其可以但不限于包含第一基站的标识、第一基站的物理位置信息、所述第一UE所接入的第一基站管理的小区的标识等。
在一种可能的设计中，所述PCF还可以但不限于通过以下方式获取所述组合配置信息：
方式一：确定本地保存的所述组合配置信息；
方式二：向统一数据库网元发送所述第一终端设备的信息；接收来自所述统一数据存储库网元的签约信息，其中，所述签约信息中包含所述组合配置信息；
方式三：从所述策略关联请求中获取所述组合配置信息。
在一种可能的设计中，所述PCF可以根据所述组合配置信息和所述第一UE的位置指示信息，优先为所述第一UE配置L2 relay的中继方式。这样，核心网中的AMF或PCF可以通过以上实施例提供的方法保证所述第一UE可以与同一组合中的其他UE通过同一基站接入，或者直接通过指示L2 relay的中继方式指示来指示第一UE与同组合中的其他UE接入同一基站，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过L3 relay接入)。总之，所述PCF生成的中继方式指示所指示的中继方式，为所述第一UE优选或需要使用的中继方式。
在一种可能的设计中，所述PCF可以根据所述组合配置信息和所述第一UE的位置指示信息，优先为所述第一UE配置L2 relay的中继方式，包括：
所述PCF确定该组合配置信息所指示的终端设备组合中其他已注册的目标终端设备(后续简称为第二终端设备)的位置指示信息，然后根据所述第一终端设备的位置指示信 息和第二终端设备的位置指示信息，判断第一终端设备是否能够与该第二终端设备通过同一基站接入；当判断二者可以通过同一基站接入时，确定所述第一终端设备的中继方式为L2 relay。
可选的，当所述第一终端设备的位置指示信息与所述第二终端设备的位置指示信息表示：第一终端设备和第二终端设备位置较近时(例如位于同一跟踪区域，或同一小区的覆盖范围内，或者第一终端设备接入的第一基站与第二终端设备接入的第二基站距离较近，或者物理位置的距离较近(比如，第一终端设备的经纬度和第二终端设备的经纬度之间的欧氏距离小于设定阈值)，或者第一终端设备与第二终端设备接入同一基站时，所述PCF可以决定第一终端设备(可选的，第二终端设备)可以采用L2 relay的中继方式接入。
第七方面，本申请实施例提供了一种通信装置，包括用于执行以上第一方面至第六方面中各个步骤的单元。
第八方面，本申请实施例提供了一种通信设备，包括至少一个处理元件和至少一个存储元件，其中该至少一个存储元件用于存储程序和数据，该至少一个处理元件用于执行本申请以上第一方面至第六方面中提供的方法。
第九方面，本申请实施例还提供了一种计算机程序，当计算机程序在计算机上运行时，使得计算机执行上述任一方面提供的方法。
第十方面，本申请实施例还提供了一种计算机存储介质，计算机存储介质中存储有计算机程序，当计算机程序被计算机执行时，使得计算机执行上述任一方面提供的方法。
第十一方面，本申请实施例还提供了一种芯片，芯片用于读取存储器中存储的计算机程序，执行上述任一方面提供的方法。
第十二方面，本申请实施例还提供了一种芯片系统，该芯片系统包括处理器，用于支持计算机装置实现上述任一方面提供的方法。在一种可能的设计中，芯片系统还包括存储器，存储器用于保存该计算机装置必要的程序和数据。该芯片系统可以由芯片构成，也可以包含芯片和其他分立器件。
附图说明
图1为本申请实施例提供的一种移动通信系统的架构示意图；
图2为本申请实施例提供的另一种移动通信系统的架构示意图；
图3A为本申请实施例提供的一种采用L2 relay中继方案的移动通信系统的架构示意图；
图3B为本申请实施例提供的另一种采用L2 relay中继方案的移动通信系统的架构示意图；
图4A为本申请实施例提供的一种大上行分流业务的通信场景示意图；
图4B为本申请实施例提供的一种高可靠业务场景的示意图；
图4C为本申请实施例提供的另一种高可靠业务场景的示意图；
图5为本申请实施例提供的一种远端UE、中继UE与移动通信网络的关系示意图；
图6为本申请实施例提供的一种通信方法的流程图；
图7为本申请实施例提供的另一种通信方法的流程图；
图8为本申请实施例提供的再一种通信方法的流程图；
图9为本申请实施例提供的又一种通信方法的流程图；
图10为本申请实施例提供的又一种通信方法的流程图；
图11为本申请实施例提供的一种确定UE的中继方式的方法的流程图；
图12为本申请实施例提供的另一种确定UE的中继方式的方法的流程图；
图13为本申请实施例提供的一种通信装置的结构图；
图14为本申请实施例提供的一种通信设备的结构图。
具体实施方式
本申请提供一种通信方法及设备，用于保证需要协作通信的多个终端设备能够接入同一基站。其中，方法和设备是基于同一技术构思的，由于方法及设备解决问题的原理相似，因此设备与方法的实施可以相互参见，重复之处不再赘述。
以下对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)、基站，是通信系统中将终端设备接入到无线网络的设备。基站作为无线接入网中的节点，又可以称为网络设备，还可以称为无线接入网(radio access network，RAN)节点(或设备)，接入网(access network，AN)节点(或设备)，或者称为接入点(access point，AP)。
目前，一些基站的举例为：新一代节点B(generation Node B，gNB)、传输接收点(transmission reception point，TRP)、演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、接入点(access point，AP)基站控制器(base station controller，BSC)、基站收发台(base transceiver station，BTS)、家庭基站(例如，home evolved NodeB，或home Node B，HNB)，或基带单元(base band unit，BBU)，企业LTE离散窄带聚合(Enterprise LTE Discrete Spectrum Aggregation，eLTE-DSA)基站等。
另外，在一种网络结构中，基站可以包括集中单元(centralized unit，CU)节点和分布单元(distributed unit，DU)节点。这种结构将基站的协议层拆分开，部分协议层的功能放在CU集中控制，剩下部分或全部协议层的功能分布在DU中，由CU集中控制DU。
2)、终端设备，是一种向用户提供语音和/或数据连通性的设备。终端设备又可以称为用户设备(user equipment，UE)、移动台(mobile station，MS)、移动终端(mobile terminal，MT)等。
例如，终端设备可以为具有无线连接功能的手持式设备、各种车载设备、路侧单元等。目前，一些终端设备的举例为：手机(mobile phone)、平板电脑、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device，MID)、智能销售终端(point of sale，POS)、可穿戴设备，虚拟现实(virtual reality，VR)设备、增强现实(augmented reality，AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端、各类智能仪表(智能水表、智能电表、智能燃气表)、车载电子控制单元(electronic control unit，ECU)等、车载电脑、车载巡航系统、远程信息处理器(telematics box，T-BOX)等。
3)、中继方式，为终端设备通过中继设备接入移动通信网络的方式。从协议栈的角度来分，中继方式主要分为：层零中继(L0 relay)、层一中继(L1 relay)、层二中继(L2 relay)， 以及层三中继(L3 relay)。
L0 relay，终端设备和基站之间的中继设备为传统的直放站。该中继设备可以将收到的所有信号直接进行放大并转发。
L1 relay，终端设备和基站之间的中继设备可以将接收的信号进行快速傅里叶反变化，然后在对采样后的数据进行放大并转发。该中继设备可以认为是增强型直放站，能够进行适当的功率控制和频率选择性放大。
L2 relay，在L1 relay的基础上，终端设备和基站之间的中继设备还可以将收到的数据进行译码和校验，并再次编码，其具有独立的MAC层功能，具有部分资源分配功能，可以对用户进行灵活地调度和控制。采用L2 relay，终端设备和基站通过MAC寻址即可通信，基站的PDCP层可以对数据包进行排序、组合、去重等处理，而核心网不感知中继设备。
L3 relay，在L2 relay的基础上，终端设备和基站之间的中继设备引入了IP层的功能，通过IP路由实现通信，核心网能够感知到中继设备。L3 relay中的中继设备可以视为无线回传的基站，具有完整的网络层协议。
需要说明的是，在本申请实施例中涉及的中继方式为L2 relay和L3 relay两种。
4)、“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
需要说明的是，本申请中所涉及的多个，是指两个或两个以上。至少一个，是指一个或多个。
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。
下面结合附图，对本申请实施例进行详细描述。
本申请实施例提供的通信方法适用于移动通信系统，所述移动通信系统的架构如图1和图2所示。其中，图1为基于参考点的系统架构，图2为基于服务化接口的系统架构。
参阅图1和图2所示，所述移动通信系统包括三部分：终端设备、移动通信网络和数据网络(data network，DN)。下面参考附图分别对每个部分的功能和实体进行详细介绍。
终端设备，简称为UE，为用户侧能够接收和发射无线信号的实体，需要通过移动通信网络接入DN，以实现UE的业务。所述UE可以为各种为用户提供语音和/或数据连通性的设备，本申请对此不作限定。
DN，也可以称为分组数据网络(packet data network，PDN)，是位于移动通信网络之外的网络。DN上可部署多种业务，可为UE提供数据和/或语音等服务。其中，移动通信网络可以接入至少一个DN，同一个DN也可以被至少一个移动通信网络接入。例如，所述DN可以为因特网(Internet)、IP多媒体业务(IP Multi-media Service，IMS)网络、某些应用专用的数据网络、以太网、IP本地网络等，本申请对此不作限定。
移动通信网络，由运营商部署和维护，为UE提供接入服务和端到端的连接服务。UE可以通过移动通信网络访问DN，实现具体业务。其中，所述移动通信网络又可以包括(无线)接入网((radio)access network，(R)AN)和核心网(core network，CN)两部分。在UE请求访问DN时，移动通信网络可以在UE和DN之间建立PDU会话，以使二者可以实现通信。
(R)AN主要负责UE的无线接入功能，(R)AN的功能具体可以通过基站来实现。基站是网络侧能够接收和发射无线信号的实体，负责为在其覆盖范围内的UE提供无线接入有关的服务，实现物理层功能、资源调度和无线资源管理、服务质量(Quality of Service，QoS)管理、无线接入控制、用户面数据转发以及移动性管理功能。基站与UE通过Uu接口实现空口传输。
CN负责根据UE通过接入网发送的呼叫请求或业务请求将所述UE接续到不同的数据网络上，以及计费、移动性管理、会话管理等业务。按照具体的逻辑功能划分，CN可以划分为控制面(control plane，CP)和用户面(user plane，UP)。那么CN中负责控制面功能的网元可以统称为控制面网元，负责用户面功能的网元可以统称为用户面网元。下面分别对核心网中的主要网元的功能进行具体介绍。
用户面网元，即用户面功能(user plane function，UPF)网元，简称为UPF，主要负责UE的用户面数据的转发和接收。用户面网元可以从DN接收用户面数据，通过基站传输给UE；用户面网元还可以将通过基站从UE接收用户面数据，并将其转发到DN。其中，用户面网元中为UE提供服务的传输资源和调度功能是由控制面网元管理控制的。
控制面网元包括：接入和移动性管理功能(access and mobility management function，AMF)网元、会话管理功能(session management function，SMF)网元、策略控制功能(policy control function，PCF)网元、认证服务功能(authentication server function，AUSF)网元、网络暴露功能(network exposure function，NEF)网元、统一数据库(unified data repository，UDR)网元，统一数据管理(unified data management，UDM)网元和应用功能(application function，AF)网元等。下面分别对各个控制面网元进行简单介绍。
AMF网元，可以简称为AMF，主要负责移动通信网络中的移动性管理，接入鉴权/授权，和信令处理部分，例如：接入控制、UE位置更新、UE注册、附着与去附着，以及选择SMF等功能。此外AMF还负责在UE和PCF之间传递用户策略。
SMF网元，可以简称为SMF，主要负责移动通信网络中的会话管理，例如会话建立、修改释放等。具体的，SMF的功能包括：UPF的选择，UPF重定向，因特网协议(internet protocol，IP)地址分配，承载的建立、修改和释放，以及QoS控制等。
PCF网元，可以简称为PCF，主要负责支持提供统一的策略框架来控制网络行为，提供策略规则给其他控制面网元，同时负责获取与策略相关的用户签约信息。
AUSF网元，可以简称为AUSF，主要负责提供认证功能，支持3GPP接入和Non-3GPP接入的认证。
NEF网元，可以简称为NEF，主要支持移动通信网络和第三方应用安全的交互，能够安全的向第三方暴露网络能力和事件，用于加强或者改善应用服务质量。移动通信网络也可以通过NEF网元安全地从第三方获取相关数据，用以增强网络的智能决策。
UDR网元，可以简称为UDR，主要负责存储UE的签约数据、策略数据、应用数据等类型数据。
UDM网元，可以简称为UDM，主要负责存储和管理UE的签约数据、用户接入授权，生成认证信任状，用户标识处理(如存储和管理用户永久身份标识等)等功能。
AF网元，可以简称为AF，主要传输应用侧对网络侧的需求，支持与核心网中其他网元的交互来提供服务，例如影响数据路由决策，策略控制功能或者向网络侧提供第三方的一些服务。AF网元可以是第三方功能实体，也可以是运营商部署的应用服务。
NSSF网元，可以简称为NSSF，主要负责网络切片的选择。
需要理解的是，CN中的以上各网元既可以是在专用硬件上实现的网络元件，也可以是在专用硬件上运行的软件实例，或者是在虚拟化平台(例如云平台)上虚拟化功能的实例。此外，本申请实施例并不限定通信系统中各个网元的分布形式，可选的，以上各个网元可以分别部署在不同的物理设备中，或者多个网元融合在同一物理设备中。
另外，图1中还展示了移动通信系统中各个网络功能实体之间的交互关系以及对应的接口。图2还展示了移动通信系统中部分网络功能实体之间采用的服务化接口。
需要说明的是，图1或图2所示的移动通信系统并不构成本申请实施例能够适用的移动通信系统的限定。因此本申请实施例提供的通信方法还可以适用于各种制式的通信系统，例如：长期演进(long term evolution，LTE)通信系统、第五代(The 5th Generation，5G)通信系统、第六代(The 6th Generation，6G)通信系统以及未来通信系统。此外，图1或图2也不对移动通信系统的通信场景进行限定，除图1和图2所示的非漫游场景以外，本申请还可以适用于各种漫游场景。
最后，还需要说明的是，本申请实施例也不对移动通信系统中各网元的名称进行限定，例如，在不同制式的移动通信系统中，各网元可以有其他名称；又例如，当多个网元融合在同一物理设备中时，该物理设备也可以有其他名称。
为了扩大(R)AN中的基站的覆盖范围，消除覆盖盲点和提升系统容量的考虑，UE还可以采用L2 relay的中继方式，通过中继节点(又称为中继设备)接入基站，从而可以有效地改善信道传输质量，降低UE的功耗。即UE可以通过中继接口接入中继节点，而中继节点可以通过传统的Uu接口与基站进行空口传输。其中，中继节点在物理表现形式上可以为UE，也可以为其他设备，本申请对此不作限定。
UE和中继节点之间的中继接口可以为近距业务通信接口5(ProSe communication 5，PC5)，WIFI接口、蓝牙接口等，本申请对此也不做限定。
当UE通过中继节点接入移动通信网络时，UE还可以称为远端(remote)UE，简称为远端UE(remote UE)；而当中继节点为UE时，中继节点可以称为中继UE(relay UE)，后续本申请实施例仅以中继节点为中继UE为例进行说明。示例性的，采用L2 relay中继方案的移动通信系统的架构可以如图3A和图3B所示。
在L2 relay中继方案中，中继UE可以根据接入层(access stratum layer，AS layer)的配置转发远端UE的上下行数据，使得远端UE可以接入基站。
在移动通信系统中，无论是Uu接口还是PC5接口等中继接口，均包含控制面协议栈和用户面协议栈。其中，用户面协议栈中均至少包含以下协议层：物理(physical，PHY)层、媒体访问控制(medium access control，MAC)层、无线链路控制(radio link control，RLC)层和PDCP层、服务数据适配协议(service data adaptation protocol，SDAP)层；控制面协议栈中至少包含以下协议层：PHY层、MAC层、RLC层、PDCP层、无线资源控制(radio resource control，RRC)层。
每个UE可以基于图1至图3B所示的移动通信系统的架构实现通信业务，然而受限于单个UE的传输能力，在某些通信场景中，可能需要多个UE协作通信以完成某些特定的业务。
例一：在图4A所示的大上行分流业务(以扩展现实(extended reality，XR)业务为例)场景中，移动通信系统可以将业务端——XR眼镜生成的XR业务数据划分为两部分(如图中所示的第一业务数据和第二业务数据)，然后通过UEa将第一业务数据发送到基站，通过UEb将第二业务数据发送到基站。其中，任一个UE可以直接接入基站或者采用L2 relay中继方案通过中继节点接入基站。如图4A所示，该XR业务数据可以在UEa的PDCP层、RLC层，或MAC层进行业务分流，即UEa可以在接收到XR眼镜的XR业务数据后，在PDCP层、RLC层、MAC层从XR业务数据中分离出第二业务数据发送给UEb，由UEb将第二业务数据发送给基站；而UEa将第一业务数据直接发送给基站。另外，图中的PDCP’层表示PDCP层的额外的功能，即对UEa的PDCP层数据包和UEb的PDCP层数据包进行统一排序。可选的，该PDCP’层可以复用UEa的PDCP层，或者复用UEb的PDCP层，本申请对此不作限定。在该场景中，需要协作通信的UEa和UEb配置在同一UE组合中，以便于移动通信网络管理。
为了进一步提高数据分流，图4A中的任一个UE(UEa或UEb)可以作为远端UE通过中继UE接入基站。在该UE能够直接接入基站的情况下，还可以通过UE协作(UE cooperation，UC)的方式实现数据传输。UC方式是指UE的中继链路(relay link)和直连链路(direct link)同时激活，以传输业务数据。其中，中继链路是指UE通过中继节点接入基站的通信链路，直连链路是指UE直接通过接入基站的通信链路。在远端UE采用UC方式传输业务数据的场景中，远端UE可以将需要传输的那部分业务数据继续分解(split)，分别通过直连链路和至少一条中继链路(或者通过多条中继链路)传输到基站。基站可以将在不同通信链路上的接收的业务数据进行聚合处理，之后在对外发送。在该场景中，需要协作通信的远端UE以及其中继UE也应该配置在同一UE组合中，以便于移动通信网络管理。
例二：在图4B所示的高可靠业务场景中，业务端与基站之间存在多条通信链路。在业务端为UE时，业务端作为远端UE可以采用L2 relay中继方案通过中继UE1和中继UE2接入基站。远端UE可以将业务数据进行复制(duplication)，然后分别通过直连链路、中继链路1，和中继链路2中的至少两条通信链路传输到基站。基站可以只选择其中一条通信链路(例如传输质量最高的通信链路)进行业务数据接收，或者同时接收多条通信链路中的业务数据选择其中一份业务数据对外发送。在该场景中，需要协作通信的远端UE以及其中继UE也应该配置在同一UE组合中，以便于移动通信网络管理。
例三：在图4C所示的高可靠业务场景，业务端不具有与基站建立连接的功能(即业务端不是UE)，因此，业务端可以与多个UE建立连接，而该多个UE可以分别接入基站。如图4C所示，业务端可以将生成的业务数据进行复制，然后分别通过UEa-UEc的三条通信链路传输到基站。与图4B所示场景中基站的操作类似，基站可以只选择其中一条通信链路进行业务数据接收，或者同时接收多条通信链路中的业务数据后选择其中一份业务数据对外发送。在该场景中，需要协作通信的UEa-UEc应该配置在同一UE组合中，以便于移动通信网络管理。
为了进一步提高数据的可靠性，在图4C中的任一个UE(UEa或UEb或UEc)可以作为远端UE通过中继UE接入基站。在该UE能够直接接入基站的情况下，还可以通过UC方式实现数据传输。即远端UE可以将需要传输的业务数据继续复制为多份，然后分别通过直连链路和至少一条中继链路(或者通过多条中继链路)传输到基站。此时，需要协 作通信的远端UE以及其中继UE也应该配置在同一UE组合中，以便于移动通信网络管理。
应注意，在移动通信系统中，远端UE和中继UE均可以通过Uu接口直接接入基站，因此，远端UE和中继UE与移动通信网络的关系如图5所示。需要说明的是，为远端UE服务的核心网设备与为中继UE服务的核心网设备可以是全部相同的网元，也可以是全部不同的网元，也可以是部分相同的网元，本申请对此不作限定。类似的，远端UE访问的DN1与中继UE访问的DN2也可以是相同或不同的DN。
基于提高移动通信网络的数据传输效率和资源利用率的考虑，在多个UE协作通信的场景中，该多个UE应该接入同一基站。进一步的，由于不同基站之间的PDCP层很难互通，因此，当需要协作通信的多个UE采用L2 relay的中继方式接入基站的情况下，该多个UE必须要接入同一基站，否则无法实现协作通信。
然而，在实际场景中，需要协作通信的UE组合中的两个UE可能会处于两个基站的共同覆盖范围内，因此，这两个UE可能接入不同的基站，从而导致该两个UE之间无法实现协作通信，进而影响该UE组合的协作通信效果，最终影响整个业务的实现。
为了保证在多个UE协作通信的场景中该多个UE能够接入同一基站，本申请实施例提供了一种通信方法，该方法可以适用于图1-图3B，以及图5所示的移动通信系统中。下面参阅图6所示的流程图，对该方法进行详细说明。
S601：第一UE通过第一基站向AMF发送注册请求。所述AMF通过第一基站接收来自所述第一UE的注册请求。
可选的，所述第一UE可以但不限于通过搜网、小区重选、小区切换、异系统切换、随机接入等流程接入第一基站。
S602：所述AMF确定组合配置信息，其中，所述组合配置信息用于指示所述第一UE所签约的UE组合，该UE组合中包含的多个目标UE，所述多个目标UE中包含所述第一UE。
可选的，所述组合配置信息可以包含该UE组合中每个目标UE的信息(例如标识信息)。可选的，所述组合配置信息中还可以包含该UE组合的组标识信息。例如，UE组合a中包含UE1和UE2，那么指示UE组合a的组合配置信息中可以包含：UE组合a的组标识信息(UE group IDa)，UE1的标识信息(UE ID1)以及UE2的标识信息(UE2 ID2)。
其中，该UE组合包含的多个目标UE需要协作通信以实现特定业务，该UE组合又可以称为UE协作组或UE协作通信组。
例如，在大上行分流业务场景中，第一UE和第二UE被分配了同一业务的不同业务数据的情况下，第一UE和第二UE应配置到同一UE组合中。
又例如，当第一UE需要通过中继UE(以UEa为例)连接基站(可选的，第一UE还可以通过直连链路连接基站)的情况下，该第一UE和UEa应配置到同一UE组合中。
再例如，当第一UE通过多个中继UE(以UEa和UEb为例)分别连接基站(可选的，第一UE还可以通过直连链路连接基站)的情况下，该第一UE、UEa和UEb应配置到同一UE组合中。
在本申请实施例中，所述AMF可以但不限于通过以下方式确定所述组合配置信息：
方式一：所述AMF通过签约信息获取流程从UDM获取该组合配置信息，具体步骤如下：
所述AMF向UDM发送所述第一UE的信息；然后接收来自所述UDM的所述第一UE的签约信息。其中，所述签约信息中包含所述组合配置信息。
可选的，所述AMF可以向所述UDM发送签约信息获取请求，所述签约信息获取请求中包含所述第一UE的信息。相应的，所述签约信息可以携带在签约信息获取响应中，由UDM发送给所述AMF。
在移动通信系统中，第一UE可能会发起多次注册流程。可选的，AMF可以在每次接收到第一UE的注册请求后，均采用方式一来获取该组合配置信息。
方式二：所述AMF确定本地保存的所述组合配置信息。
在移动通信系统中，第一UE可能会发起多次注册流程，即AMF可能需要在每次注册流程中获取所述组合配置信息。在一种实施方式中，所述AMF可以在首次接收到第一UE的注册请求时，采用方式一来获取组合配置信息，然后所述AMF可以保存第一UE的该组合配置信息。这样，当所述AMF再次接收到该第一UE的注册请求后，可以直接在本地读取该组合配置信息，即通过方式二确定该组合配置信息。通过这种方式，可以降低AMF的信令交互，以使在第一UE再次发起注册流程时，AMF可以快速地确定第一UE所属UE组合的组合配置信息，进而可以降低第一UE与同组合中其他已注册目标UE接入同一基站的时延，最终可以提高该UE组合协作通信的效率。
在另一种实施方式中，所述AMF可以为私网场景中(例如某工厂)的AMF，因此，该AMF中可以配置有该组合配置信息。示例性的，所述AMF可以在出厂时配置有该组合配置信息，也可以是用户将该组合配置信息存储到所述AMF的，本申请对此不作限定。因此，所述第一UE每次发起注册流程时，所述AMF可以通过方式二获取所述组合配置信息。
方式三：所述AMF可以从其他AMF获取所述组合配置信息。
例如，当第一UE从该其他AMF的服务区域移动到当前AMF的服务区域时，所述AMF可以从该其他AMF获取所述组合配置信息。又例如，当第一UE是通过异系统切换流程切换第一UE时，该其他AMF可以为源移动通信系统中负责接入和移动性管理功能的网元(例如MME等)。
S603：当该组合配置信息所指示的UE组合中已注册的目标UE(以下称为第二UE)接入的第二基站与所述第一基站不同时，所述AMF指示所述第一UE接入所述第二基站。
在一种实施方式中，当前第一UE所处网络环境中只有一个AMF，或者第一UE位于一个AMF的服务区域内，例如私网场景或者在一个固定范围的工作环境内(工厂、企业)。此时，当前网络环境中的所有基站均连接到该AMF。在该情况下，每个UE通过基站注册到移动通信网络时，该AMF均可以在本地保存该UE所接入的基站的信息(例如，该基站的标识信息、连接该基站的隧道标识信息、该基站管理的小区的标识信息等)。
因此，在该实施方式下，对第一UE进行移动性管理的AMF在执行S603时，可以确定该组合配置信息所指示的UE组合中已注册的目标UE所接入的基站的信息，然后判断第一UE接入的第一基站与已注册的目标UE所接入的基站是否相同。
在另一种实施方式中，当前第一UE所处网络环境中存在多个AMF，或者第一UE位于多个AMF的服务区域内。在该情况下，在该组合配置信息所指示的UE组合中，可能 会存在不同目标UE接入的基站连接不同AMF的场景。在该场景中，当任一UE通过基站注册到移动通信网络后，移动通信网络中负责该UE的移动性管理的AMF可以将该UE的信息，以及该UE所接入的基站的信息存储到统一的数据存储网元。可选的，所述数据存储网元可以为非结构化数据存储功能(unstructured data storage function，UDSF)、UDM(假设第一UE所属UE组合中的这些目标UE可以选择到同一个UDM)、UDR(可能通过NEF将这些信息存储到UDR中)、或PCF中的任一项等等。
可选的，在本实施方式下，对第一UE进行移动性管理的AMF在执行S603时，可以从该统一的数据存储网元获取该组合配置信息所指示的UE组合中已注册的目标UE所接入的基站的信息，之后所述AMF判断第一UE接入的第一基站与其他已注册的目标UE所接入的基站是否相同。示例地，所述AMF可以通过以下步骤，获取该组合配置信息所指示的UE组合中已注册的目标UE所接入的基站的信息：
所述AMF可以将所述组合配置信息发送给该数据存储网元，或者所述AMF可以将所述组合配置信息所指示的UE组合中目标UE的信息发送给该数据存储网元；然后，所述AMF接收所述数据存储网元发送的已注册的目标UE所接入的基站的信息。
可选的，在本实施方式下，对第一UE进行移动性管理的AMF在执行S603时，还可以将所述第一基站的信息(可选的，还可以包括：所述组合配置信息，或所述组合配置信息所指示的UE组合中目标UE的信息)发送给该数据存储网元。由数据存储网元来判断第一基站与UE组合中其他已注册的目标UE所接入的基站是否相同，然后向所述AMF反馈判断结果。进一步的，当数据存储网元确定第一基站与其他已注册的目标UE(第二UE)所接入的基站不同时，还可以向所述AMF反馈第二UE所接入的基站的信息(即第二基站的信息)。
在本申请实施例中，所述AMF可以但不限于通过以下方式，指示所述第一UE接入所述第二基站：
方式a：所述AMF向所述第一UE发送注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息(简称为第一信息)。应注意，在具体实现时，所述AMF也可以通过其他消息通知所述第一UE，此处仅以注册拒绝消息为例。
其中，所述第一信息可以但不限于为：所述第二基站的标识信息，或者所述第二基站所管理的小区的标识信息，本申请对此不作限定。
另外，所述注册拒绝消息中还可以包含拒绝原因值。其中，该原因值用于通知所述第一UE由于没有和所在的UE组合内的其他目标UE在同一基站下接入(被拒绝的)。此时，所述第一UE可以根据该原因值判断需要通过其他基站接入。
方式b：所述AMF向所述第一基站发送用于将所述第一UE重定向到所述第二基站的信息(简称为第二信息)。
其中，所述第二信息可以但不限于为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引((RAT/frequency selection priority，RFSP)index)，其中，在所述RFSP index中，所述第二基站所使用的频率或接入技术的优先级最高。
在本方式中，所述AMF还可以向所述第一基站发送重定向指示，以使所述第一基站根据该重定向指示将所述第一UE重定向到所述第二基站。可选的，所述第二信息(和所述重定向指示)可以携带在注册接受消息中。应注意，在具体实现时，所述AMF也可以 通过其他消息通知所述第一UE，此处仅以注册接受消息为例。
另外，在所述AMF通过方式b，指示第一基站将所述第一UE重定向到第二基站之后，所述AMF还可以向第二基站发送用于指示所述第二基站不再将所述第一UE重定向到其他基站的指示。该指示还可以称为禁止重选指示，禁止重定向指示，或禁止切换指示等，后续简称为禁止重选指示。这样，当所述第一UE后续通过S604接入第二基站后，所述第二基站可以根据该禁止重选指示，不再针对第一UE发起小区重选流程；或者在针对第一UE发起小区重选流程时，通过小区重选配置信息中的配置使第一UE不再重选到其他基站管理的小区。例如，该小区重选配置信息中仅携带第二基站管理的小区的信息；或者该小区重选配置信息中携带多个小区的信息，但是所述第二基站管理的小区的重选优先级最高，这样可以使第二基站优先为第一UE提供接入服务。
应注意，本申请不限定属于同一UE组合的不同目标UE是否接入同一小区。因此，当第二基站管理多个小区时，第二基站向第一UE发送的小区重选配置信息中可以包含第二基站管理的至少一个小区的信息或全部小区的信息；并且，当该小区重选配置信息中还包含其他基站管理的小区时，第二基站管理的小区的重选优先级均高于其他基站管理的小区的重选优先级。
当所述AMF通过方式b指示第一UE接入第二基站，且第二信息为RFSP index时，在步骤S603中，所述AMF还可以通过以下步骤获取该RFSP index：
a1：所述AMF向PCF发送策略关联请求，其中，所述策略关联请求中包含所述AMF在S602中得到的所述组合配置信息。
a2：所述PCF接收来自所述AMF的所述策略关联请求后，确定所述组合配置信息所指示的UE组合对应的频率或接入技术。在本申请实施例中，由于已注册第二UE也是采用本实施例提供的方法接入第二基站，因此，所述组合配置信息所指示的UE组合对应的频率或接入技术即第二基站所使用的频率或接入技术。
其中，所述PCF中可以保存多个UE组合对应的频率或接入技术，当接收到所述组合配置信息后，可以确定该组合配置信息所指示的UE组合对应的频率或接入技术。
a3：所述PCF根据所述组合配置信息所指示的UE组合对应的频率或接入技术，生成所述RFSP index；所述PCF向所述AMF发送策略关联响应，所述策略关联响应中包含所述RFSP index。
示例性的，当该UE组合对应(需要对应)的频率或接入技术为频段A或接入技术A时，所述PCF生成的RFSP index中指示优先级最高的域内包含频段A或接入技术A对应的索引值。
a4：所述AMF接收来自所述PCF的所述策略关联响应。
需要说明的是，以上步骤涉及的策略关联请求可以为策略关联建立/修改请求(例如，接入与移动性策略关联建立/修改请求)，相应的，所述策略关联响应可以为策略关联建立/修改响应(例如，接入与移动性策略关联建立/修改响应)。
S604：所述第一UE接入所述第二基站。
与S603中所述AMF指示所述第一UE接入所述第二基站的方式相应的，本步骤的执行过程存在两种方式：
方式I：与方式a对应的，所述第一UE接收来自所述AMF的注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息(即第一信息)。此时，所述第一UE可以根 据该第一信息，接入所述第二基站。其中，所述第一信息可以但不限于为：所述第二基站的标识信息，或者所述第二基站所管理的小区的标识信息。
可选的，在方式I中，所述第一UE可以对当前可以接入的小区或基站进行筛选，只选择与该第一信息对应的小区或基站(即第二基站管理的小区或第二基站)。
例如，所述AMF向所述第一UE发送第二基站的标识信息(gNB ID 2)，那么，所述第一UE只接入小区标识(例如，NR无线接入小区全球标识(NR cell global identifier，NCGI)或者NR无线接入小区标识(NR cell identity，NCI))中包含gNB ID 2的小区。可以理解的是，NCGI中包含NCI，NCI中包含gNB ID。
又例如，所述AMF向所述第一UE发送所述第二基站管理的小区的标识信息(NCGI 2)，那么，所述第一UE接入标识为NCGI 2的小区。
应注意，以上举例均为示例，不对第一UE接入第二基站的方式构成限定。
此外，所述第一UE可以继续通过所述第二基站向所述AMF发起注册流程。
方式II：与方式b对应的，所述第一基站接收来自所述AMF的用于将所述第一UE重定向到所述第二基站的信息(即第二信息)后，将所述第一UE重定向到所述第二基站。其中，所述第二信息可以但不限于为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；RFSP index，其中，在所述RFSP index中，所述第二基站所使用的频率或接入技术的优先级最高。
可选的，在方式II中，所述第一基站还可以从所述AMF接收重定向指示，这样，所述第一基站可以根据所述重定向指示，以及所述第二信息，将所述第一UE重定向到所述第二基站。
还需要说明的是，在本申请实施例中，在S602之后，所述AMF还可以根据所述组合配置信息，确定所述第一UE的中继方式，具体步骤如下：
b1：所述AMF向PCF发送策略关联请求，其中，所述策略关联请求中包含所述组合配置信息和所述第一UE的位置指示信息。
所述第一UE的位置指示信息用于指示所述第一UE的位置。可选的，所述第一UE的位置指示信息可以包含：所述第一UE接入的所述第一基站的信息，和/或，所述第一UE的物理位置信息。其中，所述第一基站的信息用于表示所述第一UE位于所述第一基站的覆盖范围内，其可以但不限于包含第一基站的标识、第一基站的物理位置信息、所述第一UE所接入的第一基站管理的小区的标识等。
b2：所述PCF根据所述组合配置信息和所述第一UE的位置指示信息，确定该组合配置信息所指示的UE组合中可以通过同一基站接入时，确定所述第一UE需要采用L2 relay方式的中继方式(例如L2 relay preference)。
b3：所述PCF向所述AMF发送策略关联响应，其中，所述策略关联响应中包含用于指示中继方式为L2 relay的指示(后续可以称为中继方式指示，例如，L2 relay倾向信息(L2 relay preference))。
b4：所述AMF接收来自所述PCF的策略关联响应。
b5：所述AMF向所述第一UE和/或所述第二基站发送所述中继方式指示，以使所述第一UE采用L2 relay的中继方式接入。
需要说明的是，以上步骤涉及的策略关联请求可以为策略关联建立/修改请求，相应的，所述策略关联响应可以为策略关联建立/修改响应。
在一种实施方式中，上述步骤中的策略关联建立/修改请求可以包括接入与移动性策略关联建立/修改请求，策略关联建立/修改响应可以包括接入与移动性策略关联建立/修改响应。在该情况下，所述AMF可以从PCF获取具体的策略信息(即中继方式指示)，并在确定第一UE能够使用L2 relay时来执行本方法中的操作。
在另一种实施方式中，上述步骤中的策略关联建立/修改请求可以包括用户设备策略关联建立/修改请求，策略关联建立/修改响应可以包括用户设备策略关联建立/修改响应，在该情况下，所述AMF可以从PCF获取的具体的策略信息(即中继方式指示)，并将该策略信息传递给第一UE，以指示第一UE根据该策略信息选择中继方式。
应注意，上述两种实施方式可以存在一种或同时存在。
还应注意的是，AMF可以通过一个策略关联流程同时从PCF获取RFSP index和中继方式指示，即：上述步骤a1中的策略关联请求中还包含第一UE的位置指示信息，在步骤a3之前执行步骤b2，在步骤a3、a4中的策略关联响应中除RFSP index以外还包含中继方式指示。
需要说明的是，在实际应用中，可能存在同一UE组合中接入相同或不同基站的多个UE同时请求注册的现象，此时，AMF可以针对每个请求注册的UE执行上述方法，以保证同一UE组合中的UE接入相同的基站。
本申请实施例提供了一种通信方法，在该方法中，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中的第二UE接入的第二基站不同时，AMF可以指示第一UE接入该第二基站。这样，AMF可以控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
基于图6所示的实施例提供的方法，本申请还提供了一些实施例，这些实施例同样可以适用于如图1-图3B，以及图5所示的移动通信系统中。下面参阅图7-图9对各个实施例进行说明。
实施例一：参阅图7所示。
S701：第一UE在接入第一基站后，通过所述第一基站向AMF发送注册请求。
S702：所述AMF向UDM发送包含所述第一UE的信息的签约信息获取请求，以请求获取所述第一UE的签约信息。
S703：所述UDM根据所述签约信息获取请求中的所述第一UE的信息，获取所述第一UE的签约信息；然后所述UDM向所述AMF返回签约信息。其中，所述第一UE的签约信息中除了包含目前常用的签约数据以外，还包含所述第一UE所属UE组合的组合配置信息。
其中，所述组合配置信息用于指示所述第一UE所签约的UE组合，该UE组合中包含的多个目标UE。
S704：所述AMF获取所述组合配置信息后，确定所述第一UE接入的第一基站与所述组合配置信息所指示的UE组合中其他已注册目标UE(第二UE)接入的第二基站不同。
可选的，所述AMF可以采用图6所示的实施例中S603中记载的两种实施方式，执行S704，具体过程可以参考S603中的描述，此处不再赘述。
S705：所述AMF向所述第一UE发送注册拒绝消息，其中，所述注册拒绝消息中包 含所述第二基站的信息。可选的，所述注册拒绝消息中还可以拒绝原因值，其中，该原因值用于通知所述第一UE由于没有和所在的UE组合内的其他目标UE在同一基站下接入(被拒绝的)。
其中，所述第二基站的信息可以但不限于为：所述第二基站的标识信息，或者所述第二基站所管理的小区的标识信息。
显然，所述AMF确定所述第二基站为所述第一UE中所属UE组合共同接入的基站。但是，需要说明的是，本实施例对所述AMF判断UE组合共同接入的基站的规则不作限定。在具体实现中，所述AMF可以根据UE组合中的目标UE接入基站的先后顺序，基站的负载情况(例如基站接入的UE数量)等为规则，判断该UE组合共同接入的基站。
例如，当第二UE接入第二基站之后，才收到第一UE首次发起的注册请求，那么AMF可以确定第二基站为该UE组合共同接入的基站，此时所述AMF可以通过执行S705指示第一UE接入第二基站。
又例如，在第二UE接入第二基站之前，所述第一UE先接入第一基站(本次注册流程并非第一UE首次发起的注册流程时)，AMF可以确定第一基站为该UE组合共同接入的基站，此时所述AMF还可以通知第二UE接入所述第一基站。
再例如，相对于第一UE接入的第一基站，第二UE接入的第二基站的负载率更低，那么AMF可以确定第二基站为该UE组合共同接入的基站，此时所述AMF可以通过执行S705指示第一UE接入第二基站。
S706：所述第一UE可以根据所述第二基站的信息，接入所述第二基站。
在本实施例中，所述第一UE可以采用图6所示的实施例中的S604中的方式I接入所述第二基站，此处不再赘述。
S707：所述第一UE在接入所述第二基站后，通过所述第二基站向AMF发送注册请求。
通过本实施例，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中已注册的第二UE接入的第二基站不同时，AMF可以向第一UE发送第二基站的信息，以使第一UE接入该第二基站。这样，AMF可以控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
实施例二：参阅图8所示。
S801-S804与实施例一中的S701-S704相同，相同步骤可以相互参考，此处不再赘述。
S805：AMF向第一基站发送所述第二基站的信息，以使所述第一基站将第一UE重定向到所述第二基站。可选的，所述AMF还可以向所述第一基站发送重定向指示。
可选的，所述AMF可以将所述第二基站的信息和所述重定向指示(可选的)携带在注册接受消息中发送给所述第一基站。
其中，所述第二基站的信息可以但不限于为：所述第二基站的标识信息，或者所述第二基站所管理的小区的标识信息。
需要说明的是与S705中类似的，本实施例也不对AMF判断UE组合共同接入的基站的规则不作限定，具体可以参考S705中的描述，此处不再赘述。
S806：所述第一基站可以根据接收的所述第二基站的信息，将所述第一UE重定向到 所述第二基站。
可选的，当所述第一UE重定向到所述第二基站后，所述第二基站可以向为所述第二基站提供服务的AMF(本实施例假设为第一基站提供服务的AMF与为第二基站提供服务的AMF相同)反馈通知消息，以告知该AMF第一UE已成功重定向到所述第二基站。
S807：当所述第一UE接入所述第二基站之后，为第一基站提供服务的AMF还可以向所述第二基站发送用于指示所述第二基站不再将所述第一UE重定向到其他基站的指示，即禁止重选指示。应注意，S807为可选步骤。
通过步骤S807，所述第二基站可以根据该禁止重选指示，不再针对第一UE发起小区重选流程；或者在针对第一UE发起小区重选流程时，通过小区重选配置信息中的配置使第一UE不再重选到其他基站管理的小区。例如，该小区重选配置信息中仅携带第二基站管理的小区的信息；或者该小区重选配置信息中携带多个小区的信息，但是所述第二基站管理的小区的重选优先级最高，这样可以使第二基站优先为第一UE提供接入服务。
例如，在第二基站接收到针对第一UE的禁止重选指示之后，当第二基站需要重定向一些UE时(例如第二基站管理的小区负载太高)，第二基站会优先重定向没有收到禁止重选指示的UE；或者，所述第二基站可以将同一组UE统一进行重定向，即可以将第一UE所属UE组合中的所有已接入的目标UE统一重定向到第三基站(应注意，在本方案中，网络侧(如AMF)还需要将第一UE所属UE组合的组合配置信息发送给所述第二基站)。
通过本实施例，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中已注册的第二UE接入的第二基站不同时，AMF可以向第一基站发送第二基站的信息，以使所述第一基站可以把第一UE重定向到该第二基站。这样，AMF可以控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
需要说明的是，实施例一和实施例二提供的方法均是在第一UE请求注册时所述第一UE所属的UE组合中存在已注册的目标UE的场景下实现的。那么当第一UE请求注册时，所述第一UE所属的UE组合中不存在已注册的目标UE时，移动通信网络可以采用传统的注册流程实现。进一步的，当接入不同基站的、属于同一UE组合多个目标UE均向AMF请求注册，且此时该UE组合中不存在其他已注册的目标UE时，那么AMF可以在该多个目标UE所接入的多个基站中选择任一个作为该UE组合共同接入的基站。示例性的，所述AMF可以采用以下任一原则从该多个基站中选择该UE组合共同接入的基站：
随机选择；选择当前接入目标UE数量最多的基站；选择与请求注册的每个目标UE的距离在设定范围内的基站；选择与请求注册的各个目标UE的距离之和最短的基站等。
实施例三：参阅图9所示。
S901-S903与实施例一中的S701-S703相同，相同步骤可以相互参考，此处不再赘述。
S904：AMF向PCF发送策略关联请求，其中，所述策略关联请求中包含获取的第一UE所属UE组合的组合配置信息。
S905：所述PCF确定所述组合配置信息所指示的UE组合对应的频率或接入技术。由于该UE组合中其他已注册第二UE也是采用本申请实施例提供的方法接入第二基站的，因此，即第二基站所使用的频率或接入技术与该UE组合对应的频率或接入技术相同。所述PCF根据所述组合配置信息所指示的UE组合对应的频率或接入技术，生成RFSP index。 其中，在所述RFSP index中，该UE组合对应的频率或接入技术的优先级最高。所述PCF向所述AMF发送策略关联响应，所述策略关联响应中包含所述RFSP index。
在本实施例中，通过在PCF中配置每个UE组合对应的频率或接入技术，从而可以使同一UE组合中的UE能够接入使用该UE组合对应频率或接入技术的同一基站。
S906：所述AMF向所述第一基站发送所述RFSP index，以使所述第一基站可以将根据所述RFSP index将所述第一UE重定向到所述第二基站。可选的，所述AMF还可以向所述第一基站发送重定向指示。
可选的，所述AMF可以将所述RFSP index和所述重定向指示(可选的)携带在注册接受消息中发送给所述第一基站。
S907：所述第一基站判断所述RFSP index中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术是否相同(即判断第一基站与UE组合中其他已注册的第二UE接入的基站是否相同)，当确定所述RFSP index中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术不同时执行S908。
当所述第一基站确定所述RFSP index中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术相同时，无需执行重定向流程。
S908：所述第一基站根据接收的所述RFSP index，将所述第一UE重定向到所述第二基站(即使用该UE组合对应的频率或接入技术的基站)。
S909与实施例二中的S807相同，相同步骤可以相互参考，此处不再赘述。
实施例四：与实施例三类似，不同的是：在本实施例中，所述AMF还可以在执行S906之前，判断所述RFSP index中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术是否相同(即判断第一基站与UE组合中其他已注册的第二UE接入的基站是否相同)，若不相同，则执行S906，若相同则无需执行S906。
在本实施例中，S907为可选步骤。
实施例五：与实施例三或实施例四类似的，不同的是：在S903之后，在S906之前(例如在S904和S904之间)，所述AMF还可以在获取第一UE所属UE组合的组合配置信息后，判断第一UE所接入的第一基站是否与该组合配置信息所指示的UE组合中其他已注册的目标UE(即第二UE)所接入的第二基站是否相同，具体过程可以参考图6所示的实施例中S603中的描述，此处不再赘述。在所述AMF确定第一基站与第二基站不同时执行步骤S904。
在本实施例中，S907为可选步骤。
通过本实施例三至实施例五，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中已注册的第二UE接入的第二基站不同时，所述第一基站根据从AMF接收的RFSP index，将第一UE重定向到该第二基站，其中，该RFSP index中第一UE所属UE组合对应的频率或接入技术(即该UE组合中已注册的第二UE接入的第二基站使用的频率或接入技术)优先级最高。这样，核心网可以通过RFSP index控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
为了保证在多个UE协作通信的场景中该多个UE能够接入同一基站，本申请实施例提供了一种通信方法，该方法可以适用于图1-图3B，以及图5所示的移动通信系统中。下面参阅图10所示的流程图，对该方法进行详细说明。
S1001：第一UE接入第一基站后，所述第一UE通过接入的第一基站向AMF发送注册请求。所述AMF通过第一基站接收来自所述第一UE的注册请求。
可选的，所述第一UE可以但不限于通过搜网、小区重选、小区切换、异系统切换、随机接入等流程接入第一基站。
S1002：所述AMF向PCF发送策略关联请求。在所述第一UE请求注册的过程中，PCF接收来自AMF的策略关联请求。其中，策略关联请求中可以包含所述第一UE的信息。
所述PCF可以但不限于通过以下两个方式获取所述第一UE所属UE组合的组合配置信息。
方式一：
S1003a.所述PCF获取本地保存的该组合配置信息。
方式二：从UDR获取该组合配置信息。
S1003b1：所述PCF向所述UDR发送包含所述第一UE的信息的签约信息获取请求。
S1003b2：所述UDR向所述PCF发送所述第一UE的签约信息，其中，该签约信息中包含所述第一UE所属UE组合的组合配置信息。
与图6所示的实施例中，AMF获取第一UE所属UE组合的组合配置信息类似的。在移动通信系统中第一UE可能会发起多次注册流程。因此，所述PCF也可以在所述第一UE首次注册流程中采用上述方式二从UDR获取该组合配置信息，然后所述PCF可以保存所述组合配置信息。这样，当所述第一UE再次发起注册流程时，所述PCF可以直接在本地读取该组合配置信息。
另外，在所述PCF具有保存多个UE的组合配置信息的功能的情况下，所述PCF也可以直接采用方式一来获取任一个UE的组合配置信息。
S1004-S1008与图9所示的实例三中的S905-S909相同，相同步骤可以相互参考，此处不再赘述。
可选的，在另一个实施例中，所述AMF还可以在执行S1005之前，判断所述RFSP index中优先级最高的频率或接入技术与第一基站使用的频率或接入技术是否相同(即判断第一基站与UE组合中其他已注册的第二UE接入的基站是否相同)，若不相同，则执行S1005，若相同则无需执行S1005。在本实施例中，S1006为可选步骤。
可选的，在又一个实施例中，在PCF通过S1003a，或者S1003b2获取第一UE所属UE组合的组合配置信息之后，还可以判断第一UE所接入的第一基站是否与该组合配置信息所指示的UE组合中其他已注册的目标UE(即第二UE)所接入的第二基站是否相同；在确定第一基站与第二基站不同时执行步骤S1004。在本实施例中，S1006为可选步骤。应注意，在本实施例中，所述PCF中可以保存已注册UE的信息以及该UE所接入的基站信息；即任一UE通过基站注册到移动通信网络后，移动通信网络中负责该UE的移动性管理的AMF可以将该UE的信息，以及该UE所接入的基站的信息存储到PCF中。
本申请实施例提供了一种通信方法，在该方法中，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中已注册的第二UE接入的第二基站不同时，所述第一基站可以根据从AMF接收的RFSP index，将第一UE重定向到该第二基站， 其中，该RFSP index中第一UE所属UE组合对应的频率或接入技术(即该UE组合中已注册的第二UE接入的第二基站使用的频率或接入技术)优先级最高。这样，核心网可以通过RFSP index控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
为了确定多个UE协作通信的场景中UE接入网络的中继方式，本申请实施例还提供了一种确定UE的中继方式的方法。该方法可以适用于以上各图所示的移动通信系统中，并可以与任一个实施例或实例提供的通信方法进行结合。下面参阅图11所示的流程图，对该方法进行详细说明。
S1101-S1103与图7所示的实例中的S701-S703相同，相同步骤可以相互参考，此处不再赘述。
S1104：AMF向PCF发送策略关联请求，其中，所述策略关联请求中包含第一UE的组合配置信息和所述第一UE的位置指示信息。
可选的，所述第一UE的位置指示信息可以包含：所述第一UE接入的第一基站的信息，和/或，所述第一UE的物理位置信息。其中，所述第一基站的信息用于表示所述第一UE位于所述第一基站的覆盖范围内，其可以但不限于包含第一基站的标识、第一基站的物理位置信息、所述第一UE所接入的第一基站管理的小区的标识等。
所述第一基站的信息可以是所述AMF在所述第一UE接入(或请求注册)时获取的，比如，所述AMF可以根据所述第一基站与所述AMF之间的隧道信息，确定所述第一基站的信息。所述第一UE的物理位置信息可以是所述AMF从位置管理功能(location management function，LMF)获取的，或者是所述AMF根据所述第一UE所在的跟踪区域(tracking area，TA)得到的，又或者是所述AMF根据所述第一UE所在小区的小区标识进行映射得到的。
S1105：所述PCF根据所述组合配置信息和所述第一UE的位置指示信息，确定所述第一UE是否能够与所述组合配置信息所指示的UE组合中的其他已注册的目标UE通过同一基站接入；若是，则所述PCF生成用于指示中继方式为L2 relay的中继方式指示(例如L2 relay倾向信息(L2 relay preference))；否则所述PCF生成用于指示中继方式为L3 relay的中继方式指示(L3 relay倾向信息(L3 relay preference))。所述PCF向所述AMF发送携带中继方式指示(L2/L3 relay倾向信息)的策略关联响应。
在本步骤中，所述PCF可以根据所述组合配置信息和所述第一UE的位置指示信息，优先为所述第一UE配置L2 relay的中继方式。这样，核心网中的AMF或PCF可以通过以上实施例提供的方法保证所述第一UE可以与同一组合中的其他UE通过同一基站接入，或者直接通过指示L2 relay的中继方式指示来指示第一UE与同组合中的其他UE接入同一基站，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过L3 relay接入)。总之，所述PCF生成的中继方式指示所指示的中继方式，为所述第一UE优选或需要使用的中继方式。
在一种实施方式中，在UE完成注册后，负责该UE的移动性管理的AMF可以将该UE的位置指示信息存储到PCF中。这样，所述PCF在执行S1105时，可以根据所述第一UE的位置指示信息，以及该组合配置信息所指示的UE组合中其他已注册的目标UE(后续简称为第二UE)的位置指示信息，判断第一UE是否能够与该第二UE通过同一基站接 入。
比如，当所述第一UE的位置指示信息与所述第二UE的位置指示信息表示：第一UE和第二UE位置较近时(例如位于同一跟踪区域(tracking area，TA)，或同一小区的覆盖范围内，或者第一UE接入的第一基站与第二UE接入的第二基站距离较近，或者物理位置的距离较近(比如，第一UE的经纬度和第二UE的经纬度之间的欧氏距离小于设定阈值)，或者第一UE与第二UE接入同一基站时，所述PCF可以决定第一UE(可选的，第二UE)可以采用L2 relay的中继方式接入。
在另一种实施方式中，在UE完成注册后，负责该UE的移动性管理的AMF可以将该UE的位置指示信息存储到其他同一的数据存储网元。可选的，所述数据存储网元可以为UDSF、UDM(假设第一UE所属UE组合中的这些目标UE可以选择到同一个UDM)、或UDR(可能通过NEF将这些信息存储到UDR中)。在该情况下，所述PCF在执行S1105时，可以根据该组合配置信息，从该数据存储网元获取该组合配置信息所指示的UE组合中其他已注册的目标UE(后续简称为第二UE)的位置指示信息。这样，所述PCF可以根据所述第一UE的位置指示信息，以及所述第二UE的位置指示信息，判断第一UE是否能够与该第二UE通过同一基站接入，具体判断过程可以参考以上实施方式，此处不再赘述。
还需要说明的是，以上两种实施方式不对所述PCF确定第一UE是否能够与该第二UE通过同一基站接入的方式进行限定。例如，在已注册的UE的位置指示信息存储在数据存储网元的情况下，所述PCF还可以将组合配置信息(或者当前该组合配置信息所指示的UE组合中已注册的第二UE的标识)和第一UE的位置指示信息发送给该数据存储网元；数据存储网元可以基于接收的信息，来判断第一UE是否能够与该第二UE通过同一基站接入，并将判断结果通知所述PCF。其中该数据存储网元具体判断过程可以参考上述第一种实施方式，此处不再赘述。
S1106：所述AMF向所述第一UE和/或所述第一基站发送所述中继方式指示，以使所述第一UE可以采用所述中继方式指示所指示的L2 relay或L3 relay接入网络。
还应注意的是，当本实施例与前述实施例结合时，只有当所述AMF收到的中继方式指示L2 relay时，所述AMF才执行指示第一UE接入第二基站的步骤。
而当所述AMF收到的中继方式指示L3 relay时，所述AMF可以采用传统的方案执行后续过程，此处不再赘述。
S1107：所述第一UE和/或所述第一基站根据接收的中继方式指示，执行相应地步骤，以使第一UE可以采用该中继方式指示所指示的L2 relay或L3 relay接入网络。
可选的，所述第一基站在执行S1107时，还可以第一UE的能力或当前的网络环境等进一步判断所述第一UE是否能够采用所述中继方式指示所指示的中继方式。当所述第一基站确定第一UE未使用该中继方式指示所指示的L2 relay或L3 relay时，所述第一基站还可以将该中继方式指示通知给所述第一UE，或者拒绝所述第一UE的接入。
另外，所述第一UE和/或所述第一基站还可以将执行S1107中的步骤的执行结果反馈给所述AMF，若所述第一UE采用该中继方式指示所指示的中继方式接入网络失败，那么所述AMF还可以向PCF上报该执行结果，以使所述PCF产相应的策略(例如更新为其他中继方式)。
基于与图11所示的实施例相同构思，本申请实施例还提供了另一种确定UE的中继方式的方法。该方法同样可以适用于以上各图所示的移动通信系统中，并可以与任一个实施例或实例提供的通信方法进行结合。下面参阅图12所示的流程图，对该方法进行详细说明。
图12所示的实施例与图11所示的实施例类似，不同的是，所述AMF不再获取第一UE所属UE组合的组合配置信息，而是由PCF自行确定。
其中，S1201-S1203b2与图10所示的实例中的S1001-S1003b2基本相同，唯一的区别在于S1202中，AMF向PCF发送的策略关联请求中包含第一UE的位置指示信息，其他相同步骤可以相互参考，此处不再赘述。
S1204-S1206与图11所示的实施例中的S1105-S1107相同，相同步骤可以参考，此处不再赘述。
综上，本申请图11和图12所示的实施例分别提供了一种确定UE的中继方式的方法。通过该方法，核心网可以根据第一UE所属UE组合的组合配置信息和该第一UE的位置指示信息，确定第一UE的中继方式。通过该方法，PCF可以根据第一UE所属UE组合的组合配置信息和第一UE的位置指示信息，优先为所述第一UE配置L2 relay的中继方式。这样，核心网中的AMF或PCF可以通过以上实施例提供的方法，保证该UE组合中的目标UE可以通过同一基站接入，从而可以提高移动通信网络的数据传输效率和资源利用率，也省去了一些不必要的尝试(尝试通过L3relay接入)。
应该注意，在图11或图12所示的实施例，以及图6-图10所示的实施例可能会利用同一过程实现相同或不同功能，例如，在图11所示的实施例中，AMF可以利用策略关联请求过程获取第一UE的中继方式指示；而图9或图10所示的实施例中，AMF可以利用策略关联请求过程获取RFSP index。又例如，在图11所示的实施例，以及图7-9所示的实例中，AMF可以通过签约信息获取过程从UDM获取第一UE的签约信息。再例如，在图10和图12所示的实施例中，PCF可以获取本地保存的第一UE所属UE组合的组合配置信息，或通过签约信息获取过程从UDR获取第一UE的签约信息。因此，当图11或图12所示的实施例与图6-图10所示的实施例中任一个方法相结合时，当二者存在同一过程时，可以复用该过程实现相应的功能。
此外，还应注意，本申请图6-图12所示的实施例是针对第一UE执行的，因此，在不同设备中交互的信息中可以包含第一UE的信息，以标识该信息是针对第一UE的。例如，注册请求、策略关联请求、策略关联响应、签约信息获取请求，以及携带本申请提供的一些信息或指示的消息等。
作为另一个解决方案，当经过以上某个实施例的操作后，同一UE组合中的多个UE可以从同一基站接入后，网络侧(如AMF)还可以进一步将该UE组合的组合配置信息发送给对应该基站(其中，AMF可以如以上实施例中的描述获取该组合配置信息)。这样，当该基站在需要重定向一些UE的情况下(例如该基站管理的小区负载太高)，那么该基站可以将同一UE组合中的UE进行统一重定向，即将同一UE组合中的UE重定向到同一个新基站。应注意，新基站也可以获取该UE组合的组合配置信息，例如，可以从源基站获取，也可以从AMF获取)。
另外，还需要说明的是，以上各个实施例中涉及的每个步骤可以为相应的设备执行，也可以是该设备内的芯片、处理器或芯片系统等部件执行，本申请实施例并不对其构成限 定。以上各实施例仅以由相应设备执行为例进行说明。
需要说明的是，在图6-12所示的具体实施例中，可以选择部分步骤进行实施，还可以调整图示中步骤的顺序进行实施，本申请对此不做限定。应理解，执行图示中的部分步骤、调整步骤的顺序或相互结合进行具体实施，均落在本申请的保护范围内。
可以理解的是，为了实现上述实施例中功能，上述实施例中涉及的各个设备包括了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，结合本申请中所公开的实施例描述的各示例的单元及方法步骤，本申请能够以硬件或硬件和计算机软件相结合的形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，取决于技术方案的特定应用场景和设计约束条件。
可以理解的是，本发明实施例描述的上述网络架构以及应用场景是为了更加清楚的说明本发明实施例的技术方案，并不构成对于本发明实施例提供的技术方案的限定，本领域普通技术人员可知，随着网络架构的演变和新业务的出现，本发明实施例提供的技术方案对于类似的技术问题，同样适用。
基于以上实施例，本申请实施例还提供了一种通信装置，该装置可以应用于图1-图3B，以及图5所示的移动通信系统中，用以实现以上实施例提供的方法。参阅图13所示，所述装置中包含通信单元1301和处理单元1302。
通信单元1301用于接收和发送数据。示例性的，通信单元1301可以通过物理接口、通信模块、通信接口、输入输出接口实现。通信装置1300可以通过该通信单元1301连接网线或电缆，进而与其他设备建立物理连接。
下面对通信装置1300应用于图1-图3B，以及图5所示移动通信系统中的各个网元时处理单元1302的功能进行介绍。
在一种实施方式中，该通信装置1300应用于图6-10所示的实施例中的AMF，所述处理单元1302，用于通过所述通信单元1301执行：
在通过第一基站接收来自第一UE的注册请求后，确定组合配置信息；其中，所述第一基站为所述第一UE接入的基站；所述组合配置信息用于指示所述第一UE所签约的UE组合，所述UE组合中包含的多个目标UE，所述多个目标UE中包含所述第一UE；以及当所述UE组合中包含的第二UE接入的第二基站与所述第一基站不同时，指示所述第一UE接入所述第二基站。
可选的，所述处理单元1302，在基于所述通信单元1301指示所述第一UE接入所述第二基站时，具体用于：
通过所述通信单元1301向所述第一UE发送注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息；或者
通过所述通信单元1301向所述第一基站发送用于将所述第一UE重定向到所述第二基站的信息。
可选的，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息；
所述用于将所述第一UE重定向到所述第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
可选的，当所述用于将所述第一UE重定向到所述第二基站的信息为所述无线频率选择优先级索引时，所述处理单元1302，还用于：
在向所述第一基站发送用于将所述第一UE重定向到所述第二基站的信息之前，通过所述通信单元1301向PCF发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息；
以及通过所述通信单元1301接收来自所述PCF的策略关联响应，其中，所述策略关联响应中包含所述无线频率选择优先级索引。
可选的，所述策略关联响应中还包含用于指示中继方式为层二中继的指示；所述处理单元1302，还用于：
通过所述通信单元1301向所述第一UE和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
可选的，所述处理单元1302，还用于：
通过所述通信单元1301向所述第一基站发送重定向指示。
可选的，所述处理单元1302，还用于：
通过所述通信单元1301向所述第二基站发送用于指示所述第二基站不将所述第一UE重定向到其他基站的指示。
可选的，所述处理单元1302，还用于：
在确定组合配置信息之后，通过所述通信单元1301向PCF发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息和所述第一UE的位置指示信息，所述第一UE的位置指示信息用于指示所述第一UE的位置；
通过所述通信单元1301接收来自所述PCF的策略关联响应；其中，所述策略关联响应中包含用于指示中继方式为层二中继的指示；
通过所述通信单元1301向所述第一UE和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
可选的，所述处理单元1302，在确定组合配置信息时，具体用于：
通过所述通信单元1301向UDM发送所述第一UE的信息，并接收来自所述统一数据管理网元的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
确定本地保存的所述组合配置信息；或者
通过所述通信单元1301从其他AMF获取所述组合配置信息。
在一种实施方式中，该通信装置1300应用于图6或图7所示的实施例中的第一UE，所述处理单元1302，具体通过所述通信单元1301执行：
通过接入的第一基站向AMF发送注册请求；
接收来自所述AMF的注册拒绝消息，其中，所述注册拒绝消息中包含第二基站的信息；
根据所述第二基站的信息，接入所述第二基站。
可选的，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息。
可选的，所述处理单元1302还用于：
在通过接入的第一基站向AMF发送注册请求之后，接收来自所述AMF的用于指示中 继方式为层二中继的指示；
当所述处理单元1302，在接入所述第二基站时，具体用于：
采用层二中继的中继方式接入所述第二基站。
在一种实施方式中，该通信装置1300应用于图6，图8-10所示的任一实施例中的第一基站，所述处理单元1302，具体通过所述通信单元1301执行：
向AMF转发第一UE的注册请求；
接收来自所述AMF的用于将所述第一UE重定向到第二基站的信息后，将所述第一UE重定向到所述第二基站。
可选的，所述用于将所述第一UE重定向到第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
可选的，所述处理单元1302，还用于：
接收来自所述AMF的重定向指示；
所述处理单元1302，在将所述第一UE重定向到所述第二基站时，具体用于：
根据所述重定向指示，将所述第一UE重定向到所述第二基站。
可选的，所述处理单元1302，还用于：
当所述用于将所述第一UE重定向到第二基站的信息为无线频率选择优先级索引时，在将所述第一UE重定向到所述第二基站之前，确定所述无线频率选择优先级索引中优先级最高的频率或接入技术与所述第一基站使用的频率或接入技术不同。
在一种实施方式中，该通信装置1300应用于图6，图9或图10所示的实施例中的PCF，所述处理单元1302，用于通过所述通信单元1301执行：
在第一UE请求注册的过程中，接收来自AMF的策略关联请求；
确定组合配置信息，其中，所述组合配置信息用于指示所述第一UE所签约的UE组合，所述终端设备组合中包含的多个目标UE，所述多个目标UE中包含所述第一UE；
向所述AMF发送策略关联响应；其中，所述策略关联响应中包含无线频率选择优先级索引，在所述无线频率选择优先级索引中第二基站(该UE组合中其他已注册的目标UE)所使用的频率或接入技术的优先级最高，其中，所述UE组合对应所述第二基站所使用的频率或接入技术。
可选的，所述处理单元1302，在确定组合配置信息时，具体用于：
确定本地保存的所述组合配置信息；或者
向UDR发送所述第一终端设备的信息；接收来自所述UDR的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
从所述策略关联请求中获取所述组合配置信息。
可选的，所述处理单元1302在确定组合配置信息之后，所述方法还包括：
获取所述第一终端设备接入的第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；
根据所述组合配置信息和所述第一终端设备的位置指示信息，确定所述第一终端设备 应采用的中继方式为层二中继；
所述策略关联响应中还包含用于指示所述中继方式为层二中继的指示。
应理解，各单元执行上述相应步骤的具体过程在上述方法实施例中已经详细说明，为了简洁，在此不再赘述。
需要说明的是，本申请实施例中对模块的划分是示意性的，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，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。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
集成的单元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全部或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)或处理器(processor)执行本申请各个实施例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。
基于以上实施例，本申请实施例还提供了一种通信设备，该设备可以应用于图1-图3B，以及图5所示的移动通信系统中，用以实现以上实施例提供的方法，具有以上实施例提供的通信装置1300的功能。参阅图14所示，所述通信设备1400包括：通信模块1401、处理器1402，存储器1403。其中，通信模块1401、处理器1402以及存储器1403之间相互连接。
可选的，通信模块1401、处理器1402以及存储器1403之间通过总线1404相互连接。总线1404可以是外设部件互连标准(peripheral component interconnect，PCI)总线或扩展工业标准结构(extended industry standard architecture，EISA)总线等。总线可以分为地址总线、数据总线、控制总线等。为便于表示，图14中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。
通信模块1401，用于接收和发送数据，实现与移动通信系统中的其他设备之间的通信。示例性的，当所述通信设备1400为核心网设备(例如AMF、PCF)时，或者当所述通信设备1400为基站且所述基站与核心网设备通信时，所述通信模块1401可以通过物理接口、通信模块、输入输出接口实现。当所述通信设备1400为UE时，或者当所述通信设备1400为基站且所述基站与UE通信时，所述通信模块1401可以通过收发器实现。
处理器1402用于实现以上实施例提供的方法，具体功能可以参考以上实施例中的描述，此处不再赘述。
其中，处理器1402可以是中央处理器(central processing unit，CPU)，网络处理器(network processor，NP)或者CPU和NP的组合等等。处理器1402还可以进一步包括硬件芯片。上述硬件芯片可以是专用集成电路(application-specific integrated circuit，ASIC)，可编程逻辑器件(programmable logic device，PLD)或其组合。上述PLD可以是复杂可编程逻辑器件(complex programmable logic device，CPLD)，现场可编程逻辑门阵列(field-programmable gate array，FPGA)，通用阵列逻辑(generic array logic，GAL)或其 任意组合。处理器1402在实现上述功能时，可以通过硬件实现，当然也可以通过硬件执行相应的软件实现。
存储器1403，用于存放程序指令等。具体地，程序指令可以包括程序代码，该程序代码包括计算机操作指令。存储器1403可能包含随机存取存储器(random access memory，RAM)，也可能还包括非易失性存储器(non-volatile memory)，例如至少一个磁盘存储器。处理器1402执行存储器1403所存放的程序指令，实现上述功能，从而实现上述实施例提供的方法。
基于以上实施例，本申请实施例还提供了一种计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行以上实施例提供的方法。
基于以上实施例，本申请实施例还提供了一种计算机可读存储介质，该计算机可读存储介质中存储有计算机程序，所述计算机程序被计算机执行时，使得计算机执行以上实施例提供的方法。
其中，存储介质可以是计算机能够存取的任何可用介质。以此为例但不限于：计算机可读介质可以包括RAM、ROM、EEPROM、CD-ROM或其他光盘存储、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质。
基于以上实施例，本申请实施例还提供了一种芯片，所述芯片用于读取存储器中存储的计算机程序，实现以上实施例提供的方法。
基于以上实施例，本申请实施例提供了一种芯片系统，该芯片系统包括处理器，用于支持计算机装置实现以上实施例中通信设备所涉及的功能。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该计算机装置必要的程序和数据。该芯片系统，可以由芯片构成，也可以包含芯片和其他分立器件。
综上所述，本申请实施例提供了一种通信方法及设备。在该方法中，在第一UE请求注册的过程中，若第一UE接入的第一基站与第一UE所属UE组合中的第二UE接入的第二基站不同时，AMF可以指示第一UE接入该第二基站。这样，AMF可以控制属于需要协作通信的UE组合中的UE能够接入到同一基站，从而可以保证该UE组合的协作通信效果，最终保证整个业务的实现。
本领域内的技术人员应明白，本申请的实施例可提供为方法、系统、或计算机程序产品。因此，本申请可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请是参照根据本申请的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装 置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (28)

  1. 一种通信方法，应用于接入和移动性管理功能网元，其特征在于，包括：
    通过第一基站接收来自第一终端设备的注册请求后，确定组合配置信息；其中，所述第一基站为所述第一终端设备接入的基站；所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；
    当所述终端设备组合中包含的第二终端设备接入的第二基站与所述第一基站不同时，指示所述第一终端设备接入所述第二基站。
  2. 如权利要求1所述的方法，其特征在于，指示所述第一终端设备接入所述第二基站，包括：
    向所述第一终端设备发送注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息；或者
    向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息。
  3. 如权利要求2所述的方法，其特征在于，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息；
    所述用于将所述第一终端设备重定向到所述第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
  4. 如权利要求3所述的方法，其特征在于，当所述用于将所述第一终端设备重定向到所述第二基站的信息为所述无线频率选择优先级索引时，在向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息之前，所述方法还包括：
    向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息；
    接收来自所述策略控制功能网元的策略关联响应，其中，所述策略关联响应中包含所述无线频率选择优先级索引。
  5. 如权利要求4所述的方法，其特征在于，所述策略关联响应中还包含用于指示中继方式为层二中继的指示；所述方法还包括：
    向所述第一终端设备和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
  6. 如权利要求2-5任一项所述的方法，其特征在于，还包括：
    向所述第一基站发送重定向指示。
  7. 如权利要求2-6任一项所述的方法，其特征在于，所述方法还包括：
    向所述第二基站发送用于指示所述第二基站不将所述第一终端设备重定向到其他基站的指示。
  8. 如权利要求1-3任一项所述的方法，其特征在于，确定组合配置信息之后，所述方法还包括：
    向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息和所述第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示 所述第一终端设备的位置；
    接收来自所述策略控制功能网元的策略关联响应；其中，所述策略关联响应中包含用于指示中继方式为层二中继的指示；
    向所述第一终端设备和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
  9. 如权利要求1-8任一项所述的方法，其特征在于，确定组合配置信息，包括：
    向统一数据管理网元发送所述第一终端设备的信息；接收来自所述统一数据管理网元的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
    确定本地保存的所述组合配置信息；或者
    从其他接入和移动性管理功能网元获取所述组合配置信息。
  10. 一种通信方法，应用于策略控制功能网元，其特征在于，包括：
    在第一终端设备请求注册的过程中，接收来自接入和移动性管理功能网元的策略关联请求；
    确定组合配置信息，其中，所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；
    向所述接入和移动性管理功能网元发送策略关联响应；其中，所述策略关联响应中包含无线频率选择优先级索引，在所述无线频率选择优先级索引中第二基站所使用的频率或接入技术的优先级最高，其中，所述终端设备组合对应所述第二基站所使用的频率或接入技术。
  11. 如权利要求10所述的方法，其特征在于，确定组合配置信息，包括：
    确定本地保存的所述组合配置信息；或者
    向统一数据库网元发送所述第一终端设备的信息；接收来自所述统一数据存储库网元的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
    从所述策略关联请求中获取所述组合配置信息。
  12. 如权利要求10或11所述的方法，其特征在于，在确定组合配置信息之后，所述方法还包括：
    获取所述第一终端设备接入的第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；
    根据所述组合配置信息和所述第一终端设备的位置指示信息，确定所述第一终端设备应采用的中继方式为层二中继；
    所述策略关联响应中还包含用于指示所述中继方式为层二中继的指示。
  13. 一种通信装置，应用于接入和移动性管理功能网元，其特征在于，包括：
    通信单元，用于接收和发送数据；
    处理单元，用于在基于所述通信单元通过第一基站接收来自第一终端设备的注册请求后，确定组合配置信息；其中，所述第一基站为所述第一终端设备接入的基站；所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；以及当所述终端设备组合中包含的第二终端设备接入的第二基站与所述第一基站不同时，基于所述通信单元指示所述第一终端设备接入所述第二基站。
  14. 如权利要求13所述的装置，其特征在于，所述处理单元，在基于所述通信单元指示所述第一终端设备接入所述第二基站时，具体用于：
    基于所述通信单元向所述第一终端设备发送注册拒绝消息，其中，所述注册拒绝消息中包含所述第二基站的信息；或者
    基于所述通信单元向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息。
  15. 如权利要求14所述的装置，其特征在于，所述第二基站的信息为所述第二基站的标识信息，或所述第二基站所管理的小区的标识信息；
    所述用于将所述第一终端设备重定向到所述第二基站的信息为以下任一项：所述第二基站的标识信息；所述第二基站所管理的小区的标识信息；无线频率选择优先级索引，其中，在所述无线频率选择优先级索引中所述第二基站所使用的频率或接入技术的优先级最高。
  16. 如权利要求15所述的装置，其特征在于，当所述用于将所述第一终端设备重定向到所述第二基站的信息为所述无线频率选择优先级索引时，所述处理单元，还用于：
    在基于所述通信单元向所述第一基站发送用于将所述第一终端设备重定向到所述第二基站的信息之前，基于所述通信单元向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息；
    以及基于所述通信单元接收来自所述策略控制功能网元的策略关联响应，其中，所述策略关联响应中包含所述无线频率选择优先级索引。
  17. 如权利要求16所述的装置，其特征在于，所述策略关联响应中还包含用于指示中继方式为层二中继的指示；所述处理单元，还用于：
    基于所述通信单元向所述第一终端设备和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
  18. 如权利要求14-17任一项所述的装置，其特征在于，所述处理单元，还用于：
    基于所述通信单元向所述第一基站发送重定向指示。
  19. 如权利要求14-18任一项所述的装置，其特征在于，所述处理单元，还用于：
    基于所述通信单元向所述第二基站发送用于指示所述第二基站不将所述第一终端设备重定向到其他基站的指示。
  20. 如权利要求13-15任一项所述的装置，其特征在于，所述处理单元，还用于：
    在确定组合配置信息之后，基于所述通信单元向策略控制功能网元发送策略关联请求；其中，所述策略关联请求中包含所述组合配置信息和所述第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；
    基于所述通信单元接收来自所述策略控制功能网元的策略关联响应；其中，所述策略关联响应中包含用于指示中继方式为层二中继的指示；
    基于所述通信单元向所述第一终端设备和/或所述第二基站发送所述用于指示中继方式为层二中继的指示。
  21. 如权利要求13-20任一项所述的装置，其特征在于，所述处理单元，在确定组合配置信息时，具体用于：
    基于所述通信单元向统一数据管理网元发送所述第一终端设备的信息，并接收来自所述统一数据管理网元的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
    确定本地保存的所述组合配置信息；或者
    基于所述通信单元从其他接入和移动性管理功能网元获取所述组合配置信息。
  22. 一种通信装置，应用于策略控制功能网元，其特征在于，包括：
    通信单元，用于接收和发送数据；
    处理单元，用于在第一终端设备请求注册的过程中，基于所述通信单元接收来自接入和移动性管理功能网元的策略关联请求；确定组合配置信息，其中，所述组合配置信息用于指示所述第一终端设备所签约的终端设备组合，所述终端设备组合中包含的多个目标终端设备，所述多个目标终端设备中包含所述第一终端设备；以及基于所述通信单元向所述接入和移动性管理功能网元发送策略关联响应；其中，所述策略关联响应中包含无线频率选择优先级索引，在所述无线频率选择优先级索引中第二基站所使用的频率或接入技术的优先级最高，其中，所述终端设备组合对应所述第二基站所使用的频率或接入技术。
  23. 如权利要求22所述的装置，其特征在于，所述处理单元，在确定组合配置信息时，具体用于：
    确定本地保存的所述组合配置信息；或者
    基于所述通信单元向统一数据库网元发送所述第一终端设备的信息，并接收来自所述统一数据存储库网元的签约信息，其中，所述签约信息中包含所述组合配置信息；或者
    基于所述通信单元从所述策略关联请求中获取所述组合配置信息。
  24. 如权利要求22或23所述的装置，其特征在于，所述处理单元，还用于：
    在确定组合配置信息之后，获取所述第一终端设备接入的第一终端设备的位置指示信息，所述第一终端设备的位置指示信息用于指示所述第一终端设备的位置；
    根据所述组合配置信息和所述第一终端设备的位置指示信息，确定所述第一终端设备应采用的中继方式为层二中继；
    所述策略关联响应中还包含用于指示所述中继方式为层二中继的指示。
  25. 一种接入和移动性管理功能网元，其特征在于，包括：
    通信接口，用于接收和发送数据；
    存储器，用于存储程序指令和数据；
    处理器，用于读取所述存储器中的程序指令和数据，通过所述通信接口实现权利要求1-9任一项所述的方法。
  26. 一种策略控制功能网元，其特征在于，包括：
    通信接口，用于接收和发送数据；
    存储器，用于存储程序指令和数据；
    处理器，用于读取所述存储器中的程序指令和数据，通过所述通信接口实现权利要求10-12任一项所述的方法。
  27. 一种计算机可读存储介质，其特征在于，所述计算机可读存储介质中存储有计算机程序，当所述计算机程序在计算机上运行时，使得所述计算机执行权利要求1-12任一项所述的方法。
  28. 一种芯片，其特征在于，所述芯片与存储器耦合，所述芯片读取所述存储器中存储的计算机程序，执行权利要求1-12任一项所述的方法。
PCT/CN2022/117363 2021-10-20 2022-09-06 一种通信方法及设备 WO2023065865A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111219477.5A CN116017607A (zh) 2021-10-20 2021-10-20 一种通信方法及设备
CN202111219477.5 2021-10-20

Publications (1)

Publication Number Publication Date
WO2023065865A1 true WO2023065865A1 (zh) 2023-04-27

Family

ID=86027124

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/117363 WO2023065865A1 (zh) 2021-10-20 2022-09-06 一种通信方法及设备

Country Status (2)

Country Link
CN (1) CN116017607A (zh)
WO (1) WO2023065865A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100228967A1 (en) * 2007-10-18 2010-09-09 Gene Beck Hahn Method of establishing security association in inter-rat handover
US20150072693A1 (en) * 2011-09-28 2015-03-12 Telefonaktiebolaget L M Ericsson (Publ) Enhanced Mobility to Home Base Station Cells
CN107889080A (zh) * 2016-09-29 2018-04-06 中兴通讯股份有限公司 一种支持远端用户设备移动性的方法及装置
CN109661836A (zh) * 2016-09-30 2019-04-19 华为技术有限公司 一种切换方法、装置及系统
CN111132238A (zh) * 2019-12-30 2020-05-08 中国联合网络通信集团有限公司 网络接入方法及装置
CN113453272A (zh) * 2020-03-25 2021-09-28 维沃移动通信有限公司 副链路中继架构中的切换方法和设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100228967A1 (en) * 2007-10-18 2010-09-09 Gene Beck Hahn Method of establishing security association in inter-rat handover
US20150072693A1 (en) * 2011-09-28 2015-03-12 Telefonaktiebolaget L M Ericsson (Publ) Enhanced Mobility to Home Base Station Cells
CN107889080A (zh) * 2016-09-29 2018-04-06 中兴通讯股份有限公司 一种支持远端用户设备移动性的方法及装置
CN109661836A (zh) * 2016-09-30 2019-04-19 华为技术有限公司 一种切换方法、装置及系统
CN111132238A (zh) * 2019-12-30 2020-05-08 中国联合网络通信集团有限公司 网络接入方法及装置
CN113453272A (zh) * 2020-03-25 2021-09-28 维沃移动通信有限公司 副链路中继架构中的切换方法和设备

Also Published As

Publication number Publication date
CN116017607A (zh) 2023-04-25

Similar Documents

Publication Publication Date Title
EP2810461B1 (en) System and method for partner network sharing architecture
EP3338485B1 (en) User equipment, base station and associated methods
WO2020057401A1 (zh) 一种网元选择方法及装置
US20230069252A1 (en) Communication Method and Communication Apparatus
JP7147830B2 (ja) 無線端末及びその方法
CN109673060B (zh) 一种通信方法及装置
US20220338106A1 (en) Slice control method and apparatus
WO2019201017A1 (zh) 一种安全算法的协商方法及装置
US20220272607A1 (en) Network Access Method and Communication Apparatus
JP7265037B2 (ja) 通信方法、通信機器、及び通信システム
US20210306381A1 (en) Method and Apparatus for Determining Security Protection Mode
WO2021203827A1 (zh) 一种通信的方法及装置
WO2019192445A1 (zh) 一种组播组创建、组播组加入方法及装置
US20210022203A1 (en) Method for deactivating user plane connection and network entity for controlling user plane connection deactivation in network
US20170142632A1 (en) Managing carrier restrictions in a wireless network
WO2019179602A1 (en) Apparatus, method and computer program
EP3886500B1 (en) Mobility management method and apparatus
EP4044630A1 (en) Communication method, apparatus, and device
WO2022037427A1 (zh) 一种移动性管理方法和装置
WO2016177106A1 (zh) 专用核心网的选择方法和装置
WO2021232852A1 (zh) 一种终端接入网络的方法及装置
US11910475B2 (en) Systems and methods for enabling efficient establishment of policy control associations
WO2022068371A1 (zh) 通信方式的确定方法、装置及存储介质
US20240073848A1 (en) Network Slice in a Wireless Network
WO2023065865A1 (zh) 一种通信方法及设备

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22882480

Country of ref document: EP

Kind code of ref document: A1