[go: up one dir, main page]

WO2025055627A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

Info

Publication number
WO2025055627A1
WO2025055627A1 PCT/CN2024/111549 CN2024111549W WO2025055627A1 WO 2025055627 A1 WO2025055627 A1 WO 2025055627A1 CN 2024111549 W CN2024111549 W CN 2024111549W WO 2025055627 A1 WO2025055627 A1 WO 2025055627A1
Authority
WO
WIPO (PCT)
Prior art keywords
interface
base station
relay node
message
network element
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/CN2024/111549
Other languages
English (en)
Chinese (zh)
Inventor
朱世超
孙飞
哈依那尔
朱元萍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Huawei Technologies Co Ltd
Original Assignee
Huawei Technologies Co Ltd
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 Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Publication of WO2025055627A1 publication Critical patent/WO2025055627A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method and device.
  • LTE R10 Long-term evolution (LTE) R10 introduced relay technology.
  • a relay node can be understood as consisting of a terminal device and a base station.
  • RN-mobile terminal MT
  • Donor eNB Donor eNB
  • Uu interface the ordinary terminal device accessing the eNB
  • X2 interfaces and S1 interfaces between the base station part of the RN (called RN-eNB) and the DeNB.
  • the control plane and user plane data on the X2 interface and the S1 interface are transmitted by means of the data radio bearer (DRB) on the Un interface between the RN-MT and the DeNB.
  • DRB data radio bearer
  • LTE relay is a layer 3 (L3) relay, and the RN has complete base station functions.
  • LTE's L3 relay technology can be extended to new radio (NR).
  • NR new radio
  • the present application provides a communication method and device for implementing NR L3 relay technology.
  • the present application provides a communication method, which can be applied to a relay node, a processor, a chip or a functional module in a relay node, etc.
  • the method may include: the relay node may send a protocol data unit PDU session establishment request to a first mobility management network element.
  • the PDU session establishment request may include first information; the relay node supports terminal device functions and base station functions; the first information may indicate that the PDU session requested to be established is used to transmit information of a first interface and/or a second interface; the first mobility management network element provides services for the terminal device function of the relay node; the first interface is an interface between the relay node and the core network, and the second interface is an interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node.
  • the relay node may receive a first message from the host base station, the first message being used to indicate the establishment of a radio bearer between the relay node and the host base station, the radio bearer being related to the PDU session, and the radio bearer being used to transmit information of the first interface and/or the second interface.
  • the wireless bearer establishment between the relay node and the host base station can be realized based on the PDU session, and then the transmission of information of the first interface and/or the second interface can be realized.
  • This method complies with the NR protocol, thereby realizing NR relay technology.
  • the radio bearer may include a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the first information may include a slice identifier and/or a request type.
  • the PDU session establishment request may also include an identifier of a second mobile management network element, which provides services for the base station function of the relay node.
  • the wireless bearer associated with the PDU session can correspond to the second mobile management network element when establishing the wireless bearer.
  • the first message can also be used to indicate that the wireless bearer corresponds to the second mobility management network element.
  • the relay node may obtain information from the network manager indicating that the second mobility management network element supports the relay function. Subsequently, a first interface may be established between the second mobility management network element and the relay node, wherein the manner in which the relay node obtains information from the network manager includes network manager pre-configuration or interaction with the network manager through information, which is not limited in this application.
  • the relay node may obtain information from the network manager indicating that the first mobility management network element supports the relay function. In this way, the relay node may send a protocol data unit (PDU) session establishment request to the first mobility management network element, wherein the manner in which the relay node obtains the information from the network manager includes network manager pre-configuration or interaction with the network manager through information, which is not limited in this application.
  • PDU protocol data unit
  • the relay node may send a first establishment request message of the first interface to the host base station via the wireless bearer to establish a first interface between the relay node and the host base station.
  • the first establishment request message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node. In this way, when the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the relay node may receive a first establishment response message of the first interface from the host base station via the wireless bearer to confirm that establishment of the first interface between the relay node and the host base station is complete.
  • the first establishment response message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node. In this way, when the second mobility management network element can perceive the relay node, the host base station can confirm that the first interface between the relay node and the second mobility management network element is established.
  • the relay node may send a first establishment request message of the second interface to the host base station via the wireless bearer to establish a second interface between the relay node and the host base station.
  • the first establishment request message of the second interface may include the identifier of the first base station. In this way, when the first base station can perceive the relay node, the second interface between the relay node and the first base station can be established through the host base station.
  • the relay node may receive a first establishment response message of the second interface from the host base station via the wireless bearer to confirm that establishment of the second interface between the relay node and the host base station is complete.
  • the first establishment response message of the second interface may include the identifier of the first base station. In this way, when the first base station can perceive the relay node, the host base station can confirm that the second interface between the relay node and the first base station is established.
  • the present application provides a communication method, which can be applied to a first mobile management network element, a processor, a chip or a functional module in the first mobile management network element, etc.
  • the method may include: after the first mobile management network element receives a protocol data unit PDU session establishment request from a relay node, based on the PDU session establishment request, sending a PDU session resource establishment request to the host base station.
  • the PDU session establishment request includes first information; the relay node supports terminal device functions and base station functions; the first information indicates that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface; the first mobile management network element provides services for the terminal device function of the relay node; the first interface is the interface between the relay node and the core network, and the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node; the PDU session resource establishment request includes the first information; the PDU session resource establishment request is used to request the host base station to establish a radio bearer, the radio bearer is related to the PDU session, and the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the wireless bearer establishment between the relay node and the host base station can be realized based on the PDU session, and then the transmission of information of the first interface and/or the second interface can be realized.
  • This method complies with the NR protocol, thereby realizing NR relay technology.
  • the radio bearer may include a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the first information may include a slice identifier and/or a request type.
  • the PDU session establishment request may also include an identifier of a second mobile management network element, which provides services for the base station function of the relay node.
  • the wireless bearer associated with the PDU session can correspond to the second mobile management network element when establishing the wireless bearer.
  • the PDU session resource establishment request may also include an identifier of the second mobile management network element.
  • the wireless bearer associated with the PDU session can correspond to the second mobile management network element when establishing the wireless bearer.
  • the first mobility management network element determines not to initiate the establishment process of the PDU session to other core network elements, it sends the PDU session resource establishment request to the host base station, which can save signaling overhead.
  • the present application provides a communication method, which can be applied to a host base station, a processor, a chip or a functional module in the host base station, etc.
  • the method may include: the host base station may receive a PDU session resource establishment request from a first mobile management network element, and the PDU session resource establishment request includes first information, and the first information indicates that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface; the first interface is the interface between the relay node and the core network, and the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node; the first mobile management network element provides services for the terminal device function of the relay node.
  • the host base station may send a first message to the relay node according to the PDU session resource establishment request, and the first message is used to indicate the establishment of the A wireless bearer between the relay node and the donor base station, wherein the wireless bearer is related to the PDU session, and the wireless bearer is used to transmit information of the first interface and/or the second interface.
  • the wireless bearer establishment between the relay node and the host base station can be realized based on the PDU session, and then the transmission of information of the first interface and/or the second interface can be realized.
  • This method complies with the NR protocol, thereby realizing NR relay technology.
  • the radio bearer may include a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the first information may include a slice identifier and/or a request type.
  • the PDU session resource establishment request may also include an identifier of the second mobile management network element, which provides services for the base station function of the relay node. In this way, when the second mobile management network element can perceive the relay node, the wireless bearer associated with the PDU session can correspond to the second mobile management network element when establishing the wireless bearer.
  • the first message can also be used to indicate that the wireless bearer corresponds to the second mobility management network element.
  • the host base station can save the mapping relationship between the wireless bearer and the second mobility management network element. In this way, when the host base station subsequently receives a message sent through the wireless bearer, it can determine to forward the message to the second mobility management network element.
  • the host base station receives a first establishment request message of a first interface from the relay node through the wireless bearer to establish a first interface between the relay node and the host base station.
  • the first establishment request message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node. In this way, when the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the host base station may send a second establishment request message of the first interface to the second mobility management network element, the second establishment request message of the first interface includes the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node, and the second mobility management network element provides services for the base station function of the relay node.
  • the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the donor base station may receive a second establishment response message of the first interface from the second mobility management network element, and the second establishment response message of the first interface includes the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node. In this way, the establishment of the first interface between the relay node and the second mobility management network element can be completed.
  • the host base station may send a first establishment response message of the first interface to the relay node via the wireless bearer to confirm that establishment of the first interface between the relay node and the host base station is complete.
  • the first establishment response message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node.
  • the host base station can confirm that the first interface between the relay node and the second mobility management network element is established.
  • the host base station may receive a second message from the relay node through the wireless bearer, the second message may include the first interface message, and the second message may also include a first target Internet Protocol IP address; when the host base station determines that the first target IP address is the IP address of the host base station, the host base station may determine not to forward the second message; and/or, when the host base station determines that the first target IP address is not the IP address of the host base station, and the host base station determines that the first target IP address is the IP address of the second mobile management network element, the second message is forwarded to the second mobile management network element, and the second mobile management network element provides services for the base station function of the relay node. In this way, the establishment of the first interface can be completed.
  • the host base station may receive a first establishment request message of the second interface from the relay node via the wireless bearer to establish a second interface between the relay node and the host base station.
  • the first establishment request message of the second interface may include an identifier of the first base station. In this way, when the first base station can perceive the relay node, the second interface between the relay node and the first base station can be established through the host base station.
  • the host base station sends a second establishment request message of the second interface to the first base station, and the second establishment request message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node. In this way, when the first base station can perceive the relay node, the second interface between the relay node and the first base station can be established through the host base station.
  • the host base station receives a second establishment response message of the second interface from the first base station, and the second establishment response message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node. In this way, the establishment of the second interface between the relay node and the first base station can be completed.
  • the donor base station may send the first portion of the second interface to the relay node via the radio bearer.
  • An establishment response message is sent to confirm that the establishment of the second interface between the relay node and the donor base station is completed.
  • the first establishment response message of the second interface includes an identifier of the first base station. In this way, when the first base station can perceive the relay node, the host base station can confirm that the second interface between the relay node and the first base station is established.
  • the host base station may receive a third message from the relay node through the wireless bearer, the third message including information of the second interface, and the third message may also include a second target Internet Protocol IP address; when the host base station determines that the second target IP address is the IP address of the host base station, the host base station determines not to forward the third message; and/or, when the host base station determines that the second target IP address is not the IP address of the host base station, and the host base station determines that the second target IP address is the IP address of the first base station, the third message is forwarded to the first base station. In this way, the establishment of the second interface can be completed.
  • the present application provides a communication method, which can be applied to a relay node, a processor, a chip or a functional module in the relay node, etc.
  • the method may include: the relay node may send a first establishment request message of the first interface to the host base station, and receive a first establishment response message of the first interface from the host base station. In this way, the establishment of the first interface can be completed.
  • the first establishment request message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node. In this way, when the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the first establishment response message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node.
  • the host base station can confirm that the first interface between the relay node and the second mobility management network element is established.
  • the present application provides a communication method, which can be applied to a host base station, a processor, a chip or a functional module in the host base station, etc.
  • the method may include: the host base station receives a first establishment request message of the first interface from the relay node, and sends a first establishment response message of the first interface to the relay node. In this way, the establishment of the first interface can be completed.
  • the first establishment request message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node. In this way, when the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the first establishment response message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node.
  • the host base station can confirm that the first interface between the relay node and the second mobility management network element is established.
  • the host base station may send a second establishment request message of the first interface to the second mobility management network element, the second establishment request message of the first interface includes the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node, and the second mobility management network element provides services for the base station function of the relay node.
  • the second mobility management network element can perceive the relay node, the first interface between the relay node and the second mobility management network element can be established through the host base station.
  • the donor base station may receive a second establishment response message of the first interface from the second mobility management network element, and the second establishment response message of the first interface includes the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node. In this way, the establishment of the first interface between the relay node and the second mobility management network element can be completed.
  • the present application provides a communication method, which can be applied to a relay node, a processor, a chip or a functional module in the relay node, etc.
  • the method may include: the relay node sends a first establishment request message of the second interface to the host base station, and receives a first establishment response message of the second interface from the host base station. In this way, the establishment of the second interface can be completed.
  • the first establishment response message of the second interface includes the identifier of the first base station. In this way, when the first base station can perceive the relay node, the host base station can confirm that the second interface between the relay node and the first base station is established.
  • the present application provides a communication method, which can be applied to a host base station, a processor, a chip or a functional module in the host base station, etc.
  • the method may include: the host base station receives a first establishment request message of the second interface from the relay node, and sends a first establishment response message of the second interface to the relay node. In this way, the second interface can be completed. The establishment of the mouth.
  • the first establishment request message of the second interface may include an identifier of the first base station. In this way, when the first base station can perceive the relay node, the second interface between the relay node and the first base station can be established through the host base station.
  • the host base station sends a second establishment request message of the second interface to the first base station, and the second establishment request message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node. In this way, when the first base station can perceive the relay node, the second interface between the relay node and the first base station can be established through the host base station.
  • the host base station receives a second establishment response message of the second interface from the first base station, and the second establishment response message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node. In this way, the establishment of the second interface between the relay node and the first base station can be completed.
  • the first establishment response message of the second interface includes an identifier of the first base station. In this way, when the first base station can perceive the relay node, the host base station can confirm that the second interface between the relay node and the first base station is established.
  • the present application provides a communication method, which can be applied to a host base station, a processor, a chip or a functional module in the host base station, etc.
  • the method may include: the host base station receives a second message from the relay node, the second message includes information of a first interface, the first interface is the interface between the relay node and the core network, and the second message may also include a first target Internet Protocol IP address; when the host base station determines that the first target IP address is the IP address of the host base station, the host base station determines not to forward the second message; and/or, when the host base station determines that the first target IP address is not the IP address of the host base station, and the host base station determines that the first target IP address is the IP address of the second mobile management network element, the second message is forwarded to the second mobile management network element, and the second mobile management network element provides services for the base station function of the relay node.
  • the present application provides a communication method, which can be applied to a host base station, a processor, a chip or a functional module in the host base station, etc.
  • the method may include: the host base station receives a third message from the relay node, the third message may include information of the second interface, the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station; the third message may also include a second target Internet Protocol IP address; when the host base station determines that the second target IP address is the IP address of the host base station, the host base station determines not to forward the third message; and/or, when the host base station determines that the second target IP address is not the IP address of the host base station, and the host base station determines that the second target IP address is the IP address of the first base station, the third message is forwarded to the first base station. In this way, the establishment of the second interface can be completed.
  • the present application further provides a communication device, which can be applied to a relay node, and the communication device has the function of implementing the method in the first aspect or each possible design example of the first aspect, or the fourth aspect or each possible design example of the fourth aspect, or the sixth aspect or each possible design example of the sixth aspect.
  • the function can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device may include a transceiver unit and a processing unit, which can perform the functions of the method in the first aspect or each possible design example of the first aspect, or the fourth aspect or each possible design example of the fourth aspect, or the sixth aspect or each possible design example of the sixth aspect, which will not be repeated here.
  • the structure of the communication device includes a processor, and optionally also includes a memory and/or a transceiver, the transceiver is used to send and receive signals, data, messages or information, and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions in the first aspect or each possible design example of the first aspect, or the fourth aspect or each possible design example of the fourth aspect, or the sixth aspect or each possible design example of the sixth aspect.
  • the memory is coupled to the processor, and stores the necessary program instructions and data for the communication device.
  • the present application further provides a communication device, which can be applied to a first mobility management network element, and the communication device has the function of implementing the method in the second aspect or each possible design example of the second aspect.
  • the function can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device may include a transceiver unit and a processing unit, which can perform the corresponding functions in the above-mentioned second aspect or various possible design examples of the second aspect, which are not elaborated here.
  • the structure of the communication device includes a processor, and optionally also includes a memory and/or a transceiver, the transceiver is used to send and receive signals, data, messages or information, etc., and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions in the above-mentioned second aspect or each possible design example of the second aspect.
  • the memory is coupled to the processor and stores program instructions and data necessary for the communication device.
  • the present application also provides a communication device, which can be applied to a host base station, and the communication device has the function of implementing the method in the third aspect or each possible design example of the third aspect, or the fifth aspect or each possible design example of the fifth aspect, or the seventh aspect or each possible design example of the seventh aspect, or the eighth aspect or each possible design example of the eighth aspect, or the ninth aspect or each possible design example of the ninth aspect.
  • the function can be implemented by hardware, or by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the communication device may include a transceiver unit and a processing unit, which can execute the functions of the method in the third aspect or each possible design example of the third aspect, or the fifth aspect or each possible design example of the fifth aspect, or the seventh aspect or each possible design example of the seventh aspect, or the eighth aspect or each possible design example of the eighth aspect, or the ninth aspect or each possible design example of the ninth aspect, which will not be elaborated here.
  • the structure of the communication device includes a processor, and optionally also includes a memory and/or a transceiver, the transceiver is used to send and receive signals, data, messages or information, and is used to communicate and interact with other devices in the communication system, and the processor is configured to support the communication device to perform the corresponding functions in the third aspect or each possible design example of the third aspect, or the fifth aspect or each possible design example of the fifth aspect, or the seventh aspect or each possible design example of the seventh aspect, or the eighth aspect or each possible design example of the eighth aspect, or the ninth aspect or each possible design example of the ninth aspect.
  • the memory is coupled to the processor, and stores the necessary program instructions and data for the communication device.
  • an embodiment of the present application provides a communication system, which may include a relay node, a first mobile management network element, and a host base station, etc.
  • the relay node is used to implement the method in the above-mentioned first aspect or each possible design example of the first aspect, or the above-mentioned fourth aspect or each possible design example of the fourth aspect.
  • the first mobile management network element is used to implement the method in the above-mentioned second aspect or each possible design example of the second aspect.
  • the host base station is used to implement the method in the above-mentioned third aspect or each possible design example of the third aspect, or the above-mentioned fifth aspect or each possible design example of the fifth aspect, or the above-mentioned seventh aspect or each possible design example of the seventh aspect, or the above-mentioned eighth aspect or each possible design example of the eighth aspect, or the above-mentioned ninth aspect or each possible design example of the ninth aspect.
  • a computer-readable storage medium stores program instructions.
  • the computer executes the method described in the first aspect and any possible design thereof, or the second aspect and any possible design thereof, or the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof, or the fifth aspect and any possible design thereof, or the sixth aspect and any possible design thereof, or the seventh aspect and any possible design thereof, or the eighth aspect and any possible design thereof, or the ninth aspect and any possible design thereof.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer.
  • the computer-readable medium may include a non-transitory computer-readable medium, a random-access memory (RAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a CD-ROM or other optical disk storage, a disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer.
  • RAM random-access memory
  • ROM read-only memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM or other optical disk storage a CD-ROM or other optical disk storage
  • disk storage medium or other magnetic storage device or any other medium that can be used to carry or store the desired program code in the form of an instruction or data structure and can be accessed by a computer.
  • an embodiment of the present application provides a computer program product, comprising instructions, which, when executed on a computer, cause the method described in the first aspect or any possible design of the first aspect, or the second aspect or any possible design of the second aspect, or the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof, or the fifth aspect and any possible design thereof, or the sixth aspect and any possible design thereof, or the seventh aspect and any possible design thereof, or the eighth aspect and any possible design thereof, or the ninth aspect and any possible design thereof to be executed.
  • the present application also provides a chip, including a processor, which is coupled to a memory and is used to read and execute program instructions stored in the memory, so that the chip implements the method described in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect, or the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof, or the fifth aspect and any possible design thereof, or the sixth aspect and any possible design thereof, or the seventh aspect and any possible design thereof, or the eighth aspect and any possible design thereof, or the ninth aspect and any possible design thereof.
  • a chip including a processor, which is coupled to a memory and is used to read and execute program instructions stored in the memory, so that the chip implements the method described in the above-mentioned first aspect or any possible design of the first aspect, or the above-mentioned second aspect or any possible design of the second aspect, or the third aspect and any possible design thereof, or the fourth aspect and any possible design thereof, or the fifth aspect
  • FIG1 is a schematic diagram of the architecture of a communication system provided by the present application.
  • FIG2 is a flow chart of a communication method provided by the present application.
  • FIG3 is a flow chart of another communication method provided by the present application.
  • FIG4 is a flow chart of another communication method provided by the present application.
  • FIG5 is a flow chart of another communication method provided by the present application.
  • FIG6 is a flow chart of another communication method provided by the present application.
  • FIG7 is a flow chart of another communication method provided by the present application.
  • FIG8 is a flow chart of another communication method provided by the present application.
  • FIG9 is a schematic diagram of the structure of a communication device provided by the present application.
  • FIG10 is a structural diagram of a communication device provided in the present application.
  • the embodiments of the present application provide a communication method and device for implementing NR L3 relay technology.
  • the method and device described in the present application are based on the same technical concept. Since the principles of solving problems by the method and device are similar, the implementation of the device and the method can refer to each other, and the repeated parts will not be repeated.
  • At least one means one or more, and more means two or more.
  • At least one of the following or similar expressions refers to any combination of these items, including any combination of single or plural items.
  • at least one of a, b, or c can mean: a, b, c, a and b, a and c, b and c, or a, b and c, where a, b, and c can be single or plural.
  • a and/or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural.
  • "/" means “or", for example, a/b means a or b.
  • FIG1 shows the architecture of a possible communication system applicable to the communication method provided in the present application
  • the communication system may include a network management, a core network element, a relay node, a donor base station, a first base station, and a terminal device, etc. Among them:
  • the network manager may be responsible for the management and maintenance of the relay node.
  • the network manager may be an operation and management (OAM) network element or server.
  • OAM operation and management
  • the relay node can be used to provide access and wireless backhaul services for terminal devices.
  • the relay node can provide terminal device functions and base station functions, and it can also be understood that the relay node can include a relay-MT (module) and a relay-base station (gNB) (module).
  • a relay-MT module
  • gNB relay-base station
  • the host base station can serve as a host node of the relay node.
  • the host base station can be a transmission reception point (TRP), a next generation NodeB (gNB) in a fifth generation (5G) mobile communication system, a radio network controller (RNC), a Node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved NodeB, or home Node B, HNB), a base band unit (BBU) or a remote radio unit (RRU), or a wireless fidelity (Wifi) access point (AP), or a base band pool (BBU pool) and RRU in a cloud radio access network (CRAN), etc.
  • TRP transmission reception point
  • gNB next generation NodeB
  • 5G fifth generation
  • RNC radio network controller
  • NB Node B
  • BSC base station controller
  • BTS base transceiver station
  • home base station e.g., home evolved NodeB
  • the host base station may also include a module or unit that performs some functions of the base station.
  • the host base station may include a centralized unit (CU) and a distributed unit (DU), that is, the host base station may include a host-CU and a host-DU.
  • CU centralized unit
  • DU distributed unit
  • the embodiments of the present application provide specific technologies and specific information for the host base station. There is no limitation on the physical device form.
  • the first base station may be the same base station as the host base station, or may be a base station different from the host base station.
  • the identifier of the first base station may include a gNB ID and/or an IP address.
  • the description of the first base station may refer to the host base station and will not be described in detail here.
  • the core network elements may include mobility management elements and user plane function (UPF) elements, among which the mobility management elements may be access and mobility management function (AMF) elements, and the identifier of the mobility management element may include AMF ID and/or IP address.
  • AMF is responsible for access and mobility management functions, including user registration, reachability, mobility management, access authentication and authorization, etc.
  • UPF is responsible for the user plane functions of the core network, including providing user message forwarding, processing, connection with DN, session anchor, quality of service (QoS) policy execution and other user plane functions.
  • QoS quality of service
  • Terminal equipment which can also be called user equipment (UE), mobile station (MS), mobile terminal (MT), etc.
  • UE user equipment
  • MS mobile station
  • MT mobile terminal
  • terminal equipment may include handheld devices with wireless connection functions, vehicle-mounted devices, etc.
  • terminal equipment can be: cellular phones, smart phones, wireless data cards, personal digital assistants (PDA), computers, mobile phones, tablet computers, notebook computers, PDAs, wireless modems, laptop computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, augmented reality (AR) devices, etc.
  • PDA personal digital assistants
  • MID mobile internet devices
  • VR virtual reality
  • AR augmented reality
  • the terminal device may be an AR device, an XR device, a MR device, a wireless terminal in industrial control, a self-driving device, a remote medical surgery device, a smart grid device, a transportation safety device, a smart city device, or a smart home device.
  • the terminal device may also be a device-to-device (D2D) terminal device, a vehicle-to-everything (V2X) communication terminal device, an intelligent vehicle, a vehicle-to-everything (V2X) system (telematics box, TBOX), a machine-to-machine/machine-type communication (M2M/MTC) terminal device, or an Internet of Things (IoT) terminal device.
  • D2D device-to-device
  • V2X vehicle-to-everything
  • V2X vehicle-to-everything
  • TBOX Telematics box, TBOX
  • M2M/MTC machine-to-machine/machine-type communication
  • IoT Internet of
  • the terminal device may be a vehicle, ship, aircraft or other vehicle, or a terminal-type roadside unit, or a communication module or chip built into a vehicle or roadside unit.
  • the terminal device may be a vehicle-mounted module.
  • the terminal device may also be an intelligent device such as an amusement device, an intelligent appliance, or an unmanned aerial vehicle.
  • the terminal device may also be a functional module, a chip, or a chip system.
  • the functional module, the chip, or the chip system may be disposed in the terminal device.
  • a first interface and/or a second interface needs to be established between the relay node and the host base station.
  • the first interface in Figure 1 can be shown as an NG interface
  • the second interface can be shown as an Xn interface.
  • the relay node can also directly establish a logical first interface with the AMF, and the information between the AMF and the relay node can be forwarded through the host base station.
  • the relay node can also establish a logical second interface with the first base station, and the information between the first base station and the relay node can be forwarded through the host base station.
  • the terminal device and the host base station can communicate via the Uu interface.
  • the host base station and the first base station can communicate via the Xn interface.
  • the host base stations and the core network elements can communicate via the NG interface.
  • the core network elements and the network management can communicate via the Internet protocol (IP).
  • IP Internet protocol
  • FIG. 1 is not limited to including only the devices shown in the figure, but may also include other devices not shown in the figure, which are not listed here one by one.
  • NR-type L3 relay is a potential research direction for R19.
  • NR has some differences compared with LTE. If LTE relay technology is directly migrated, the following problems may occur:
  • DeNB is allowed to trigger the establishment of RN-MT data radio bearer (DRB), while in NR, the establishment of DRB is triggered by the protocol data unit (PDU) session of the terminal device.
  • PDU protocol data unit
  • the base station Only when the terminal device wants to initiate a service, the base station will establish a DRB with the corresponding quality of service (QoS). The base station does not support the establishment of DRB.
  • QoS quality of service
  • the base station does not support the establishment of DRB.
  • new features such as slice identification must also be carried. Slicing is a mandatory feature of NR. When establishing a PDU session and DRB, the slice identification needs to be indicated.
  • DeNB has some functions of mobile management entity (MME) and provides MME services for RN, which may make DeNB more complicated.
  • MME mobile management entity
  • RN may make DeNB more complicated.
  • MME mobile management entity
  • LTE relay only supports fixed deployment, and network access requires two steps, so there is room for improvement in efficiency and flexibility.
  • the embodiment of the present application provides a communication method to implement NR L3 relay technology.
  • the operation performed by a certain device may also be performed by a processor, a chip, or a functional module in a certain device, and this application does not limit this.
  • the operation performed by a relay node may also be performed by a processor, a chip, or a functional module in the relay node.
  • an embodiment of the present application provides a communication method.
  • the process of the method may include the following steps:
  • Step 201 a relay node sends a PDU session establishment request to a first mobility management network element, and correspondingly, the first mobility management network element receives the PDU session establishment request from the relay node.
  • the relay node supports terminal equipment functions and base station functions. It can be understood that the relay node includes two parts: relay-MT and relay-gNB.
  • the first mobility management network element may provide services for a terminal device function of the relay node.
  • the relay node sends the PDU session establishment request to the first mobility management network element, which may be the relay-MT sending the PDU session establishment request to the first mobility management network element.
  • the PDU session establishment request includes first information, and the first information can be used to indicate that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface.
  • the first interface is the interface between the relay node and the core network
  • the second interface is the interface between the relay node and the first base station.
  • the information indicating that the PDU session requested to be established is used to transmit the first interface and/or the second interface can also be understood as the PDU session being related to the first interface and/or the second interface.
  • the first information may include information that the type of the PDU session is related to the first interface and/or the first interface; or the first information may also include indication information indicating that the type of the PDU session is related to the first interface, and/or indication information indicating that the type of the PDU session is related to the second interface, and this application does not limit this.
  • the first information may include a slice identifier (e.g., single network slice selection assistance information (S-NSSAI)) and/or a request type (request type).
  • a slice identifier e.g., single network slice selection assistance information (S-NSSAI)
  • request type e.g., request type
  • the first interface may be an NG interface
  • the second interface may be an Xn interface
  • the first base station is a device different from the module supporting the base station function of the relay node.
  • the first base station can be the same base station as the host base station, or it can be a different base station from the host base station, which is not limited in this application.
  • the first base station can also be called a neighboring base station (neighbor gNB).
  • the network manager may configure the relay node with information that the first mobility management network element supports the relay function (for example, through pre-configuration or online configuration).
  • the first mobility management network element may respond to the PDU session establishment request of the relay node and trigger the donor base station to establish a radio bearer.
  • the network management may also configure the information that the second mobile management network element supports the relay function to the relay node (for example, through pre-configuration or online configuration).
  • the second mobile management network element provides services for the base station function of the relay node.
  • the second mobile management network element can be used to establish a first interface between the relay node and the core network.
  • the network management may indicate to the relay node the information that the second mobile management network element supports the relay function.
  • the first mobility management network element and the second mobility management network element may be the same or different, and this application does not impose any limitation on this.
  • the information of the first mobility management network element supporting the relay function and the information of the second mobility management network element may be preconfigured for the relay node. Alternatively, it may be predefined that all mobility management network elements support the relay function.
  • the PDU session establishment request may also include an identifier of a second mobility management network element, so that when a wireless bearer is subsequently established, the wireless bearer associated with the PDU session is associated with the second mobility management network element.
  • the PDU session establishment request includes an identifier of the second mobility management network element.
  • Step 202 The first mobility management network element sends a PDU session resource establishment request to the donor base station based on the PDU session establishment request, wherein the PDU session resource establishment request includes the first information. Accordingly, the donor base station receives the PDU session resource request from the first mobility management network element.
  • the donor base station may include a CU and a DU.
  • the first mobility management network element may Send the PDU session resource establishment request to the CU.
  • the PDU session resource establishment request can be used to request the establishment of resources for the PDU session service of the relay-MT. It can also be understood that the PDU session resource establishment request is used to request the host base station to establish a radio bearer, the radio bearer is related to the PDU session, and the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the radio bearer may include a DRB and/or a signaling radio bearer (SRB).
  • DRB and/or a signaling radio bearer (SRB).
  • SRB signaling radio bearer
  • the first mobility management network element when it determines not to initiate the establishment process of the PDU session to other core network elements, it can send the PDU session resource establishment request to the host base station.
  • the mobility management network element when the mobility management network element receives the request from the terminal device to establish a PDU session, the mobility management network element will further initiate subsequent processes to the session management function network element and the user plane function network element.
  • the first mobile management network element may not initiate subsequent user plane processes to the session management function network element and the user plane function network element that provide services for the terminal device function of the relay node, because this PDU session is only to help establish the data radio bearer between the relay-MT and the host base station.
  • the data of the relay-gNB is transmitted to the host base station with the help of the data radio bearer.
  • the host base station may directly map it to the general packet radio service (general packet radio service, GPRS) tunneling protocol (GPRS tunneling protocol-U, GTP-U) tunnel of the terminal device, and may no longer be transmitted through the PDU session of the relay-MT. Therefore, in the present application, a formal PDU session can be directly established, eliminating the interaction between the first mobile management network element and other core network function network elements, that is, the first mobile management network element sends a PDU session resource establishment request to the host base station.
  • general packet radio service general packet radio service
  • GPRS tunneling protocol-U GPRS tunneling protocol-U, GTP-U
  • the PDU session resource establishment request may also include the identifier of the second mobility management network element.
  • Step 203 The host base station sends a first message to the relay node according to the PDU session resource establishment request, where the first message can be used to indicate the establishment of a wireless bearer between the relay node and the host base station.
  • the first message can also be used to indicate that the wireless bearer corresponds to the second mobile management network element.
  • the host base station can save the mapping relationship between the wireless bearer of the relay-MT and the second mobile management network element. In this way, the second mobile management network element is bound to the wireless bearer.
  • the host base station receives the data of the first interface of the relay-gNB from a certain wireless bearer, it knows which mobile management network element to forward to (it should be understood that the forwarding is forwarded when the second mobile management network element can perceive the relay node). In this way, the first interface message between the relay-gNB and the host base station does not need to carry the identifier of the second mobile management network element, which can reduce the impact on the current protocol.
  • the first message may be a radio resource control (RRC) message, such as an RRC reconfiguration message.
  • RRC radio resource control
  • the CU may send the first message to the relay node.
  • the CU may send the first message to a relay-MT.
  • the CU may also send a message to the DU to instruct the establishment of a wireless bearer between the relay node and the donor base station.
  • the message sent by the CU to the DU may include a slice identifier, and the slice identifier is related to the first interface and/or the second interface.
  • the message for indicating the establishment of a DRB between the relay node and the host base station may include an indication information indicating that the DRB can be used to transmit information of the first interface and/or the second interface.
  • the message sent by the CU to the DU is used to indicate the establishment of the SRB between the relay node and the host base station
  • the message may not include a slice identifier.
  • the message used to indicate the establishment of the SRB between the relay node and the host base station may include an indication information, which is used to indicate that the SRB can be used to transmit information of the first interface and/or the second interface.
  • the DU can send a response message to the CU in response to the message sent by the CU to the DU to indicate the establishment of a wireless bearer between the relay node and the host base station.
  • the donor base station may send a PDU session resource establishment response message to the first mobility management network element to indicate that the PDU session resource establishment is complete.
  • the CU sends a response PDU session resource establishment response message to the first mobility management network element.
  • the first mobility management network element may send a PDU session establishment response message to the relay node to indicate that the PDU session establishment is completed.
  • the first mobility management network element may send a PDU session establishment response message to the relay-MT.
  • the radio bearer between the relay node and the donor base station can be successfully established.
  • the present application also provides another communication method to implement the relay node and the host Establishment of a radio bearer between base stations.
  • the process of the method may include the following steps:
  • Step 301 The relay node sends a message to the donor base station requesting to establish a radio bearer, where the radio bearer is a DRB or an SRB.
  • the relay-MT may send a message to the CU requesting to establish a radio bearer, as shown in FIG. 3 .
  • the message requesting to establish a radio bearer may include an indication information, which may be used to indicate that the radio bearer is used to transmit information of the first interface and/or the second interface.
  • indication information may be used to indicate that the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the message requesting to establish a radio bearer may also include an identifier of the second mobility management network element and/or an identifier of the first base station.
  • the second mobility management network element and the first base station reference may be made to the relevant description involved in the embodiment shown in FIG. 2 above, which will not be described in detail here.
  • the message requesting to establish the wireless bearer may also include an identifier of the second mobile management network element; if the indication information included in the message requesting to establish a wireless bearer indicates that the wireless bearer is used to transmit information of the second interface, the message requesting to establish the wireless bearer may also include an identifier of the first base station; if the indication information included in the message requesting to establish a wireless bearer indicates that the wireless bearer is used to transmit information of the first interface and the second interface, the message requesting to establish a wireless bearer may also include an identifier of the second mobile management network element and an identifier of the first base station.
  • two indication information may be used to respectively indicate that the radio bearer is used to transmit the information of the first interface and that the radio bearer is used to transmit the information of the second interface, and the message requesting to establish the radio bearer includes one or both of the two indication information.
  • the message requesting to establish a radio bearer may be an RRC message or the like.
  • step 301 is an optional step.
  • Step 302 The donor base station sends a message for configuring a radio bearer to the relay node.
  • the CU may send a message for configuring a radio bearer to the relay-MT, as shown in FIG. 3 .
  • the message for configuring the radio bearer may include indication information, and the indication information may be used to indicate that the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the message for configuring the radio bearer may further include an identifier of the second mobility management network element and/or an identifier of the first base station.
  • two indication information may be used to respectively indicate that the radio bearer is used to transmit the information of the first interface and that the radio bearer is used to transmit the information of the second interface, and the message for configuring the radio bearer includes one or both of the two indication information.
  • information of the first interface and/or the second interface may be transmitted on the radio bearer.
  • the message for configuring the radio bearer may be an RRC message or the like.
  • the host base station and the relay node may also use the initial wireless bearer transmission when the relay-MT accesses the network to establish an RRC connection to transmit the information of the first interface and/or the second interface, which is not limited in this application.
  • the embodiments of the present application further provide another communication method, which can implement the establishment of the first interface.
  • the communication method may include the following three possible implementations:
  • a possible process of implementation a1 may include the following steps:
  • Step 401a1 the relay node sends a first interface message 1 to the donor base station.
  • the relay node may send the first interface message 1 to the donor base station through the radio bearer established in the aforementioned embodiment.
  • the first interface message 1 may include a first establishment request message of the first interface to request to establish the first interface.
  • the first interface message 1 may be a message of other functions besides the first establishment request message of the first interface.
  • the present application only shows message examples in the process of establishing the first interface, but does not serve as a limitation to the present application.
  • the relay-gNB may send a first interface message 1 to the donor base station.
  • the relay-gNB may send a first interface message 1 to the CU.
  • Step 401a1 is shown as an example, and it should be understood that it is not a limitation of the present application.
  • the first interface message 1 may include an identifier of a second mobility management network element.
  • the second mobility management network element may refer to the above-mentioned related description, which will not be described again.
  • the first interface message 1 may include the identifier of the second mobility management network element. This can instruct the donor base station to subsequently forward the relevant messages of the first interface to the second mobility management network element.
  • Step 402b1 the donor base station sends a first interface message 2 to the second mobility management network element.
  • the first interface message 2 may include a second establishment request message of the first interface.
  • the first interface message 2 may be a message of other functions besides the second establishment request message of the first interface.
  • the present application only shows an example of a message in the process of establishing the first interface, but it is not intended to limit the present application.
  • Step 402b1 is an optional step. For example, when the second mobility management network element can sense the relay node, step 402b1 exists.
  • the CU may send a first interface message 2 to the second mobility management network element.
  • Step 402b1 in FIG. 4 is illustrated as an example and should be understood not to be a limitation of the present application.
  • the first interface message 2 may include the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node.
  • the base station identifier of the relay node may also be understood as the base station function identifier of the relay node, which is not limited in this application.
  • the base station identifier of the relay node may be an identifier of a relay-gNB, such as a relay-gNB identifier (identity, ID) and/or an Internet protocol (IP) address of the relay-gNB.
  • a relay-gNB identifier identity, ID
  • IP Internet protocol
  • the first interface identifier of the terminal device function of the relay node can be the UE NGAP ID of the relay-MT, etc.
  • the first interface level message of the relay-gNB can be delivered by means of the UE-associated first interface message about the relay-MT.
  • the second mobility management network element is the same mobility management network element as the first mobility management network element that provides services for the terminal device function of the relay.
  • Step 403c1 The second mobility management network element sends a first interface message 3 to the host base station.
  • the first interface message 3 may include a second establishment response message of the first interface.
  • the first interface message 3 is used to respond to the first interface message 2.
  • the second establishment response message of the first interface is used to respond to the second establishment request message of the first interface.
  • the first interface message 3 may be a message of other functions besides the second establishment affecting message of the first interface.
  • the present application only shows an example of a message in the process of establishing the first interface, but it is not a limitation of the present application.
  • Step 403c1 is an optional step. For example, when the second mobility management network element can sense the relay node, step 403c1 exists.
  • the second mobile management network element may send a first interface message 3 to the CU.
  • Step 403c1 in FIG. 4 is illustrated as an example and should be understood not to be a limitation of the present application.
  • the first interface message 3 may include a base station identifier of the relay node and/or a first interface identifier of a terminal device function of the relay node.
  • Step 404d1 the donor base station sends a first interface message 4 to the relay node.
  • the donor base station may send the first interface message 4 to the relay node via the radio bearer established in the aforementioned embodiment.
  • the first interface message 4 may include a first establishment response message of the first interface.
  • the first interface message 4 is used to respond to the first interface message 1.
  • the first establishment response message of the first interface is used to respond to the first establishment request message of the first interface.
  • the first interface message 4 may be a message of other functions besides the first establishment response message of the first interface.
  • the present application only shows message examples in the process of establishing the first interface, but does not serve as a limitation to the present application.
  • the donor base station may send a first interface message 4 to the relay-gNB.
  • Step 404d1 in FIG. 4 is illustrated as an example, and it should be understood that this is not a limitation on the present application.
  • the first interface message 4 may include an identifier of the second mobility management network element.
  • Step 405e1 The donor base station sends a radio access network configuration update message to the third mobility management network element.
  • the third mobility management network element provides services for the donor base station.
  • the third mobility management network element may be different from or the same as the first mobility management network element and the second mobility management network element. This application is not limiting.
  • the radio access network configuration update (e.g., RAN CONFIGURATION UPDATE NGAP message) message can be used to notify the third mobile management network element that a new cell has been generated under the host base station.
  • step 405e1 is an optional step.
  • step 405e1 exists when the second mobility management network element cannot perceive the relay node. That is, when step 402b1 and step 403c1 exist, step 405e1 does not exist; when step 402b1 and step 403c1 do not exist, step 405e1 exists.
  • step 405e1 may exist, and in other processes, step 405e1 may not exist.
  • the establishment of the first interface between the relay node and the core network can be completed.
  • the messages sent between the relay-gNB and the second mobile management network element through the host base station can be called first interface level messages, and the first interface level messages can include the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node.
  • a possible implementation a2 may include the following steps:
  • Step 401a2 The relay node sends a second message to the donor base station, where the second message includes information about the first interface and may also include a first target IP address.
  • the second message may include information about the first interface and the first target IP address.
  • the second message may include information about the first interface, and the information about the first interface may include the first target IP address.
  • the second message may be used to request establishment of the first interface.
  • the relay-gNB can send a second message to the donor base station.
  • Step 404a2 in Figure 4 is shown as an example, and it should be understood that it is not a limitation of the present application.
  • Step 402b2 The host base station determines whether the first target IP address is the IP address of the host base station. If yes, the host base station executes step 403c2, otherwise, it executes step 404d2.
  • Step 403c2 The donor base station determines not to forward the second message.
  • Step 404d2 The donor base station determines that the first target IP address is the IP address of the second mobility management network element, and forwards the second message to the second mobility management network element.
  • the donor base station may only execute step 402b2 and step 403c2, or only execute step 402b2 and step 404d2, or execute step 402b2-step 404d2, and this application does not limit this.
  • the present application is not limited to the CU or DU implementing the operations of the host base station in steps 401a2 to 404d2.
  • FIG4 only takes CU as an example and does not serve as a limitation on the present application.
  • the second message may also be a message other than a message for requesting to establish the first interface. That is to say, the first interface level messages sent between the relay-gNB and the second mobile management network element through the host base station can be forwarded through the above-mentioned IP address-based forwarding method.
  • the process of the above-mentioned implementation method a2 is a process from the relay node to the second mobile management network element, and the message forwarding from the second mobile management network element to the relay node is the reverse process corresponding to the above process.
  • the process of the second mobile management network element sending the establishment response message of the first interface is the reverse process of the above process, which will not be described in detail here.
  • the establishment of the first interface between the relay node and the core network can be completed.
  • a possible implementation manner a3 may be a combination of the above-mentioned implementation manner a1 and implementation manner a2.
  • a possible implementation manner a3 may be a combination of the above-mentioned implementation manner a1 and implementation manner a2.
  • the implementation a1 when the relay node exchanges the first interface level message (such as a message requesting to establish the first interface or a response message for establishing the first interface) with the second mobility management network element for the first time through the donor base station, the implementation a1 may be adopted.
  • the first interface level message such as a message requesting to establish the first interface or a response message for establishing the first interface
  • the relay-gNB and the second mobility management may adopt the implementation a2.
  • the embodiment of the present application also provides another communication method, which can implement the establishment of the second interface.
  • the communication method may include the following three possible implementations:
  • a possible implementation b1 may include the following steps:
  • Step 501a1 the relay node sends a second interface message 1 to the donor base station.
  • the relay node may send the second interface message 1 to the donor base station through the radio bearer established in the aforementioned embodiment.
  • the second interface message 1 may include a first establishment request message of the second interface to request to establish the second interface.
  • the second interface message 1 may be a message of other functions besides the first establishment request message of the second interface.
  • the present application only shows message examples in the process of establishing the second interface, but it is not intended to limit the present application.
  • the relay-gNB may send a second interface message 1 to the donor base station.
  • the relay-gNB may send a second interface message 1 to the CU.
  • Step 501a1 in FIG. 5 is illustrated as an example, and it should be understood that this is not a limitation of the present application.
  • the second interface message 1 may include an identifier of the first base station.
  • the first base station may refer to the above-mentioned related description, which will not be repeated here.
  • the identifier of the first base station may be included in the second interface message 1. This may instruct the donor base station to subsequently forward the relevant messages of the second interface to the first base station.
  • Step 502b1 the donor base station sends a second interface message 2 to the first base station.
  • the second interface message 2 may include a second establishment request message of the second interface.
  • the second interface message 2 may be a message of other functions besides the second establishment request message of the second interface.
  • the present application only shows an example of a message in the process of establishing the second interface, but it is not intended to limit the present application.
  • Step 502b1 is an optional step. For example, if the first base station can sense the relay node, step 502b1 exists.
  • the CU may send a second interface 2 message to the first base station.
  • Step 502b1 in FIG. 5 is illustrated as an example, and it should be understood that this is not a limitation of the present application.
  • the second interface message 2 may include a base station identifier of the relay node and/or a second interface identifier of a terminal device function of the relay node.
  • the base station identifier of the relay node may be an identifier of the relay-gNB, such as the relay-gNB ID and/or the IP address of the relay-gNB.
  • the second interface identifier of the terminal device function of the relay node can be the UE XnAP ID of the relay-MT, etc.
  • the second interface level message of the relay-gNB can be delivered with the help of the UE-associated second interface message about the relay-MT.
  • Step 503c1 The first base station sends a second interface message 3 to the donor base station.
  • the second interface message 3 may include a second establishment response message of the second interface.
  • the second interface message 3 is used to respond to the second interface message 2.
  • the second establishment response message of the second interface is used to respond to the second establishment request message of the second interface.
  • Step 503c1 is an optional step. For example, when the first base station can sense the relay node, step 503c1 exists.
  • the first base station may send a second interface message 3 to the CU.
  • Step 503c1 in FIG. 5 is illustrated as an example, and it should be understood that this is not a limitation of the present application.
  • the second interface message 3 may include a base station identifier of the relay node and/or a second interface identifier of a terminal device function of the relay node.
  • Step 504d1 the donor base station sends a second interface message 4 to the relay node.
  • the donor base station may send a second interface message 4 to the relay node via the radio bearer established in the aforementioned embodiment.
  • the second interface message 4 may include a first establishment response message of the second interface.
  • the second interface message 4 is used to respond to the second interface message 1.
  • the first establishment response message of the second interface is used to respond to the first establishment request message of the second interface.
  • the second interface message 4 may be a message of other functions besides the first establishment response message of the second interface.
  • the present application only shows message examples in the process of establishing the second interface, but does not serve as a limitation to the present application.
  • the donor base station may send a second interface message 4 to the relay-gNB.
  • Step 504d1 in Figure 5 is illustrated as an example, and it should be understood that it is not a limitation of the present application.
  • the second interface message 4 may include an identifier of the first base station.
  • Step 505e1 The host base station sends a radio access network node configuration update message (for example: NG-RAN NODE CONFIGURATION UPDATE XnAP message) to the first base station.
  • a radio access network node configuration update message for example: NG-RAN NODE CONFIGURATION UPDATE XnAP message
  • the radio access network node configuration update message may be used to notify the first base station that a new cell is generated under the donor base station.
  • Step 505e1 is an optional step. For example, when the first base station cannot sense the relay node, step 505e1 exists. That is, when step 502b1 and step 503c1 exist, step 505e1 does not exist; when step 502b1 and step 503c1 do not exist, step 505e1 exists.
  • step 505e1 may exist, and in other processes, step 505e1 may not exist.
  • the second interface between the relay node and the first base station can be established.
  • the messages sent between the relay-gNB and the first base station through the host base station can be called second interface level messages, and the second interface level messages can include the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node.
  • a possible implementation b2 may include the following steps:
  • Step 501a2 The relay node sends a third message to the donor base station, where the third message includes information about the second interface and a second target IP address.
  • the third message may include the information of the second interface and the second target IP address.
  • the third message may include the information of the second interface, and the information of the second interface may include the second target IP address.
  • the third message may be used to request to establish a second interface.
  • the relay-gNB can send a third message to the donor base station.
  • Step 404a2 in Figure 5 is shown as an example, and it should be understood that it is not a limitation of the present application.
  • Step 502b2 The host base station determines whether the second target IP address is the IP address of the host base station. If yes, the host base station executes step 503c2, otherwise, it executes step 504d2.
  • Step 503c2 The donor base station determines not to forward the third message.
  • Step 504d2 The host base station determines that the second target IP address is the IP address of the first base station, and forwards the third message to the first base station.
  • the donor base station may only execute step 502b2 and step 503c2, or only execute step 502b2 and step 504d2, or execute step 502b2-step 504d2, and this application does not limit this.
  • the present application is not limited to the CU or DU implementing the operations of the host base station in steps 501a2 to 504d2.
  • FIG5 only takes CU as an example and does not serve as a limitation on the present application.
  • the third message may also be a message other than a message for requesting to establish a second interface. That is to say, messages at the second interface level sent between the relay-gNB and the first base station through the host base station can be forwarded through the above-mentioned method based on IP address forwarding.
  • the process of the above-mentioned implementation method b2 is the process from the relay node to the first base station, and the message forwarding from the first base station to the relay node is the reverse process corresponding to the above process.
  • the process of the first base station sending the establishment response message of the second interface is the reverse process of the above process, which will not be described in detail here.
  • the second interface between the relay node and the first base station can be established.
  • a possible implementation manner b3 may be a combination of the above-mentioned implementation manner b1 and implementation manner b2.
  • a possible implementation manner b3 may be a combination of the above-mentioned implementation manner b1 and implementation manner b2.
  • the implementation b3 when the relay node exchanges a second interface-level message (such as a message requesting to establish a second interface or a response message for establishing a second interface) with the first base station for the first time through the host base station, the implementation b1 may be adopted.
  • a second interface-level message such as a message requesting to establish a second interface or a response message for establishing a second interface
  • the relay-gNB and the first base station may adopt the implementation b2.
  • the process of establishing the first interface in the embodiment shown in FIG. 4 and the process of establishing the second interface in the embodiment shown in FIG. 5 may be implemented after the radio bearer in the embodiment shown in FIG. 2 or FIG. 3 is established, that is, the embodiment shown in FIG. 4 or FIG. 5 may be combined with FIG. 2 or FIG. 3. It should be understood that the embodiment shown in FIG. 4 or FIG. 5 may also exist independently without relying on the embodiment shown in FIG. 3 or FIG. 3, and the present application does not limit this.
  • the relay node includes a relay-gNB and a relay-MT as an example
  • the host base station includes a CU and a DU as an example
  • the mobile management network element is an AMF as an example
  • the network management is an OAM as an example
  • the first interface is an NG interface (such as NGAP)
  • the second interface is an Xn interface (such as XnAP) as an example
  • the second AMF can perceive the relay node as an example.
  • the example may include the following steps:
  • Step 601 OAM sends information indicating that the AMF supports the relay function to the relay-MT.
  • OAM may send information indicating AMF supporting the relay function to the relay-MT through a PDU session between the relay-MT and OAM.
  • OAM may configure the AMF information supporting the relay function on the relay node by local configuration or pre-configuration.
  • the AMF may include a first AMF and/or a second AMF.
  • the first AMF provides services for the relay-MT
  • the second AMF provides services for the relay-gNB.
  • the first AMF and the second AMF may be the same or different, and this application is not limited.
  • the OAM may indicate to the relay-MT information that the first AMF supports the relay function and/or information that the second AMF supports the relay function.
  • the AMF supporting the relay function may include the second AMF.
  • Step 601 is an optional step.
  • Step 602 The relay-MT sends a PDU session establishment request to the first AMF.
  • the PDU session establishment request may include first information, and the first information may indicate information for transmitting NGAP and/or XnAP. Alternatively, it may be understood that the first information indicates that the PDU session is established for transmitting NGAP and/or XnAP messages.
  • the indications of the two interface types of NGAP and XnAP may share one indication or may be indicated separately, which is not limited in this application.
  • the PDU session establishment request may also include an identifier of the second AMF so that when the DRB is subsequently established, the DRB associated with the PDU session is associated with the second AMF.
  • the PDU session establishment request includes the identifier of the second AMF.
  • Step 603 When the first AMF determines not to initiate the PDU session establishment process to other core network elements (such as SMF or UPF), the first AMF sends a PDU session resource establishment request (such as PDU session resource setup request) to the CU of the host base station.
  • a PDU session resource establishment request such as PDU session resource setup request
  • the first AMF serving the relay-MT may not initiate the subsequent user plane process to the SMF serving the relay-MT, because this PDU session is only to help establish the DRB between the relay-MT and the host base station.
  • the data of the relay-gNB can be transmitted to the host base station with the help of DRB.
  • the host base station may directly map the data to the GTP-U tunnel of the UE, and no longer pass through the PDU session of the relay-MT. Therefore, a "fake" PDU session can be directly established here, eliminating the interaction between the first AMF and SMF.
  • the first AMF can directly request the CU of the host base station to establish resources.
  • the PDU session resource establishment request may request to establish resources for the PDU session service of the relay-MT. It may also be understood that the PDU session resource establishment request is used to request the host base station to establish a radio bearer, the radio bearer is related to the PDU session, and the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the PDU session resource establishment request may include first information.
  • the PDU session resource establishment request in step 602 may also include the identifier of the second AMF.
  • Step 604 The CU of the donor base station sends a message to the DU of the donor base station for instructing to establish a radio bearer between the relay node and the donor base station.
  • Step 605 The CU of the donor base station sends a first message to the relay-MT.
  • the first message may be used to instruct the establishment of a radio bearer, such as a DRB or SRB, between the relay node and the donor base station.
  • Step 606 The DU of the donor base station sends a response message to the CU of the donor base station in response to the message sent by the CU to the DU to instruct the establishment of a radio bearer between the relay node and the donor base station.
  • Step 607 The CU of the host base station sends a PDU session resource establishment response message to the first AMF to indicate that the PDU session resource establishment is complete.
  • Step 608 The first AMF element sends a PDU session establishment response message to the relay-MT to indicate that the PDU session establishment is complete.
  • Step 609 The relay-gNB sends a first establishment request message of the NG interface to the CU of the donor base station through the radio bearer.
  • step 401a1 For a detailed description, please refer to the aforementioned step 401a1, which will not be repeated here.
  • Step 610 The CU of the donor base station sends a second establishment request message of the NG interface to the second AMF.
  • step 402b1 For a detailed description, please refer to the aforementioned step 402b1, which will not be repeated here.
  • Step 611 The second AMF sends a second establishment response message of the NG interface to the CU of the host base station.
  • step 403c1 For a detailed description, please refer to the aforementioned step 403c1, which will not be repeated here.
  • Step 612 The CU of the donor base station sends the first establishment response message of the NG interface to the relay-gNB through the radio bearer.
  • step 404d1 For a detailed description, please refer to the aforementioned step 404d1, which will not be repeated here.
  • the embodiment of the present application also provides another communication method, which includes a network access process of the relay node.
  • the process of the communication method may include the following steps:
  • Step 701 The donor base station sends an interface establishment request message to the mobility management network element, where the interface establishment request message is used to establish an interface between the donor base station and the mobility management network element.
  • the interface between the donor base station and the mobility management network element is an NG interface
  • the interface establishment request message is an NG interface establishment request message
  • the CU may send an interface establishment request message to the mobile management network element.
  • Step 701 in FIG. 7 is shown as an example. It should be understood that this example is not intended to limit the present application.
  • Step 702 The mobility management network element sends an interface establishment response message to the donor base station, where the interface establishment response message is used to indicate that the interface establishment between the donor base station and the mobility management network element is completed.
  • the interface establishment response message is an NG interface establishment response message.
  • the mobile management network element may send an interface establishment response message to the CU.
  • Step 702 in FIG. 7 is illustrated as an example. It should be understood that this example is not intended to limit the present application.
  • the interface establishment response message may also indicate whether the mobility management network element supports the relay function.
  • the relay function may include an NR medium function and/or a mobile NR relay function.
  • the mobile management network element may need two capabilities or one capability to support NR functions and mobile NR relay functions, which is not limited in this application.
  • Step 703 the CU of the donor base station sends a fourth message to the DU of the donor base station.
  • the fourth message may be an F1 interface message.
  • step 703 is an optional step.
  • step 703 exists, otherwise, step 703 does not exist, and the process goes directly to step 704 after step 702.
  • the fourth message may include NR relay barred information and/or mobile NR relay barred information to indicate whether the cell under the DU supports NR relay and/or mobile NR relay access.
  • NR relay barred information indicates whether the cell under the DU supports NR relay and/or mobile NR relay access.
  • the value of the above information may be not barred, otherwise, the value of the above information may be barred.
  • the above information indicates whether the cell under the DU supports NR relay and/or mobile NR relay access, it can be an indication at the granularity of each cell (per cell) or at the granularity of each pre public land mobile network (PLMN) or non-public network (NPN).
  • PLMN public land mobile network
  • NPN non-public network
  • Step 704 The host base station sends a fifth message to the relay node, and the fifth message includes information supporting NR relay (NR relay support).
  • the information supporting NR relay is used to indicate whether the cell or PLMN or NPN supports NR relay and/or mobile NR relay access.
  • the donor base station may send a fifth message to the relay-MT.
  • the DU sends a fifth message to the relay-MT, and step 704 in FIG. 7 is illustrated as an example. It should be understood that this example is not intended to limit the present application.
  • the fifth message may be a system information block (SIB) broadcast message, such as a SIB1 message.
  • SIB system information block
  • Step 705 The relay node initiates random access, and the relay node sends a sixth message to the host base station, where the sixth message is used to indicate that it is a NR relay or a mobile NR relay.
  • the sixth message may be message 5 (message5, Msg5) in random access, and the sixth message may carry NR relay or mobile NR relay indication (NR relay indication or mobile NR relay indication).
  • message 5 messages5, Msg5
  • the sixth message may carry NR relay or mobile NR relay indication (NR relay indication or mobile NR relay indication).
  • the relay-MT may send a sixth message to the donor base station.
  • the relay-MT sends a sixth message to the CU, and step 705 in FIG. 7 is illustrated as an example. It should be understood that this example is not intended to limit the present application.
  • Step 706 The donor base station sends a relay node access request to the mobility management network element.
  • the relay node access request includes an indication of the relay node. Indication information that the node is an NR relay or a mobile NR relay.
  • Step 706 in Figure 7 is shown as an example. It should be understood that this example is not intended to limit the present application.
  • the relay node access request may be a relay-MT access request. Accordingly, the relay-MT access request includes indication information indicating that the relay-MT is an NR relay or a mobile NR relay.
  • Step 707 The mobile management network element authenticates the relay node. If the authentication is successful, a relay node initial context establishment request is sent to the host base station.
  • the relay node initial context establishment request may include indication information of NR relay or mobile NR relay authorization.
  • the mobility management network element authenticates the relay-MT, and accordingly, the relay node initial context establishment request is a relay-MT initial context establishment request.
  • Step 707 in Figure 7 is shown as an example. It should be understood that this example is not intended to limit the present application.
  • the network access of the relay node can be achieved and authorized.
  • the relay node may move, for example, a relay-MT is switched across host base stations.
  • the embodiment of the present application also provides a communication method to support the mobility of relay nodes, so that after the NR relay-MT is switched, the NR relay-gNB can establish an NG interface or an Xn interface with the target host base station, or perform NG communication or Xn communication with the mobile management network element and other base stations through the target host base station.
  • the process of the communication method may include the following steps:
  • Step 801 The source host base station and the target host base station exchange information on whether the cell supports relay node access.
  • Step 801 is an optional step.
  • source donor source donor
  • target donor target donor
  • base stations with Xn interfaces can exchange information on whether cells within their respective control ranges support relay node access through the Xn interface.
  • the interaction between the source host base station and the target host base station is used as an example for explanation.
  • the relay node in this application may include an NR relay and/or a mobile NR relay.
  • the NR relay and the mobile NR relay may be the same relay node or two different relay nodes, which is not limited in this application.
  • Step 802 The relay node switches from the source donor base station to the target donor base station.
  • the relay-MT switches from the source host base station to the target host base station.
  • the handover process may be as follows: if it is an Xn handover, the source host base station sends a handover request (handover request) to the target host base station, the target host base station sends a handover request confirmation (handover request ack) including an RRC handover command to the source host base station, and then the source host base station sends the RRC handover command carried in the handover request confirmation to the relay-MT.
  • the source host base station sends a handover requirement (handover required) to the mobile management network element (i.e., the first mobile management network element) AMF serving the relay-MT, the first mobile management network element sends a handover request (handover request) to the target host base station, the target host base station sends a handover request confirmation (handover request ack) including an RRC handover command to the first mobile management network element, and then the first mobile management network element carries the received RRC handover command in the handover command (handover command) of the NG interface and sends it to the source host base station, and finally the source host base station sends the RRC handover command to the relay-MT.
  • the above-mentioned messages may also include other information elements, which will not be described one by one here.
  • the Xn interface handover request (handover request) sent by the source host base station to the target base station, the NG interface handover requirement (handover required) sent by the source host base station to the first mobile management network element, and the NG interface handover request (handover request) sent by the first mobile management network element to the target host base station may include a relay node indication, which may indicate that the node to be switched is a relay node.
  • the relay node indication may include, for example, an NR relay node indication (NR relay indication) or a mobile NR relay node indication (mobile NR relay indication).
  • the PDU session resources to be setup item information element included in the Xn interface handover request (handover request) sent by the source host base station to the target base station, the PDU session resource item (PDU session resource item) information element included in the NG interface handover requirement (handover required) sent by the source host base station to the first mobile management network element, and the PDU session resource setup item (PDU session resource setup item) information element included in the NG interface handover request (handover request) sent by the first mobile management network element to the target host base station may include at least one of the following: a slice identifier (such as S-NSSAI), a type indication (type Indication), or an identifier of a mobile management network element serving the relay-gNB (i.e., the second mobile management network element).
  • a slice identifier such as S-NSSAI
  • type Indication type Indication
  • an identifier of a mobile management network element serving the relay-gNB i.e., the second mobile management network element
  • the slice identifier is related to the first interface (NGAP) and/or the second interface (XnAP).
  • the type indication ie, the request type described above is used to indicate that the PDU session is related to the first interface (NGAP) and/or the second interface (XnAP).
  • the RRC switching command sent by the above-mentioned target host base station to the relay-MT via the source host base station may include an add DRB/SRB (DRB/SRB-ToAddMod) information element, which may include at least one of the following: a type indication (type Indication) or an identifier of a mobile management network element (i.e., the second mobile management network element) serving the relay-gNB.
  • DRB/SRB DRB/SRB
  • DRB/SRB-ToAddMod DRB/SRB (DRB/SRB-ToAddMod) information element, which may include at least one of the following: a type indication (type Indication) or an identifier of a mobile management network element (i.e., the second mobile management network element) serving the relay-gNB.
  • the target host base station and the relay-MT can achieve alignment of the radio bearers and the corresponding relationships between each and the mobility management network element.
  • subsequent steps 803-804d can be performed to re-initiate establishment of the first interface (such as the NG interface) and the second interface (such as the Xn interface) to the target host base station.
  • the subsequent steps 803 and 804 are no longer executed. Because the first interface and the second interface of the relay-gNB are directly established with the second mobility management network element and the first base station, the transmission channel between the relay-gNB and the target host base station can be opened, and the first interface and the second interface do not need to be re-established.
  • the subsequent steps are executed, and when it is perceived, they are not executed.
  • the first base station does not perceive the relay-gNB
  • the subsequent steps are executed, and when it is perceived, they are not executed.
  • Step 803 A first interface and/or a second interface is established between the target host base station and the relay node.
  • a first interface and/or a second interface is established between the target host base station and the relay-gNB.
  • the method for establishing the interface has been introduced in the previous embodiment and will not be repeated here.
  • Step 804a The target host base station sends a first radio access network configuration update (e.g., RANCONFIGURATION UPDATE message) message to the mobility management network element serving the target host base station to send the updated configuration information of the target host base station after the arrival of the relay node to the mobility management network element serving the target host base station.
  • a first radio access network configuration update e.g., RANCONFIGURATION UPDATE message
  • the arrival of the relay node can be understood as the relay node accessing the target host base station.
  • step 804a is applicable to the case where the relay node establishes a first interface with the target host base station.
  • Step 804b The target host base station sends a first radio access network node configuration update (e.g., NG-RAN NODE CONFIGURATION UPDATE message) message to the first base station to send the updated configuration information of the target host base station after the arrival of the relay node to the first base station.
  • a first radio access network node configuration update e.g., NG-RAN NODE CONFIGURATION UPDATE message
  • step 804b is applicable to the case where the relay node establishes a second interface with the target host base station.
  • Step 804c The source host base station sends a second radio access network configuration update message (e.g., RANCONFIGURATION UPDATE message) to the mobility management network element serving the source host base station to send the configuration information updated by the source host base station after the relay node leaves to the mobility management network element serving the source host base station.
  • a second radio access network configuration update message e.g., RANCONFIGURATION UPDATE message
  • the leaving of the relay node can be understood as the relay node being disconnected from the source host base station.
  • step 804c is applicable to the case where the relay node establishes a first interface with the source host base station.
  • Step 804d The source host base station sends a second radio access network node configuration update message (e.g., NG-RAN NODE CONFIGURATION UPDATE message) to the first base station to send the updated configuration information of the source host base station after the relay node leaves to the first base station.
  • a second radio access network node configuration update message e.g., NG-RAN NODE CONFIGURATION UPDATE message
  • step 804d is applicable to the case where the relay node establishes a second interface with the source host base station.
  • the messages in step 804a to step 804d may be used to notify the update of the cell information under the respective control range.
  • the source donor base station may perform the above steps 804c and 804d after learning that the relay-MT handover is completed.
  • the target donor base station may perform the above steps 804a and 804b after the first interface and/or the second interface are established.
  • the mobility support of the relay node can be realized, so that after the NR relay-MT is switched, the NR relay-gNB can establish an NG interface or an Xn interface with the target host base station, or perform NG communication or Xn communication with the mobile management network element and other base stations through the target host base station.
  • the embodiments of the present application further provide a communication device, as shown in FIG9 , the communication device 900 may include a transceiver unit 901 and a processing unit 902.
  • the transceiver unit 901 is used for the communication device 900 to communicate, such as receiving information (message or data) or sending information (message or data), and the processing unit 902 is used to control and manage the actions of the communication device 900.
  • the processing unit 902 may also control the steps performed by the transceiver unit 901.
  • the communication device 900 may specifically be the relay node in the above embodiment, the processor of the relay node, or a chip, or a chip system, or a functional module, etc.
  • the communication device 900 may specifically be the first mobility management network element in the above embodiment, the processor in the first mobility management network element, or a chip, or a chip system, or a functional module, etc.
  • the communication device 900 may specifically be the host base station in the above-mentioned embodiment, a processor in the host base station, or a chip, or a chip system, or a functional module, etc.
  • the transceiver unit 901 can be used to send a protocol data unit PDU session establishment request to the first mobility management network element, and receive a first message from the host base station.
  • the processing unit 902 can be used to control the transceiver operation of the transceiver unit 901.
  • the PDU session establishment request includes first information; the relay node supports terminal device function and base station function; the first information indicates that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface; the first mobility management network element provides services for the terminal device function of the relay node; the first interface is the interface between the relay node and the core network, and the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node; the first message is used to indicate the establishment of a radio bearer between the relay node and the host base station, the radio bearer is related to the PDU session, and the radio bearer is used to transmit information of the first interface and/or the second interface.
  • the radio bearer includes a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the PDU session establishment request may further include an identifier of a second mobility management network element, where the second mobility management network element provides services for a base station function of the relay node.
  • the first message may also be used to indicate that the radio bearer corresponds to the second mobility management network element.
  • the transceiver unit 901 may also be configured to receive information from a network management indicating that the second mobility management network element supports a relay function.
  • the transceiver unit 901 may also be configured to receive information from a network management system indicating that the first mobility management network element supports a relay function.
  • the transceiver unit 901 can also be used to send a first establishment request message of the first interface to the donor base station through the wireless bearer.
  • the first establishment request message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node.
  • the transceiver unit 901 may also be configured to receive a first establishment response message of the first interface from the donor base station via the wireless bearer.
  • the first establishment response message of the first interface includes an identifier of a second mobility management network element, and the second mobility management network element provides services for the base station function of the relay node.
  • the transceiver unit 901 may also be used to send a first establishment request message of the second interface to the donor base station through the wireless bearer.
  • the first establishment request message of the second interface may include an identifier of the first base station.
  • the transceiver unit 901 may also be configured to receive a first establishment response message of the second interface from the donor base station via the wireless bearer.
  • the first establishment response message of the second interface may include an identifier of the first base station.
  • the transceiver unit 901 can be used to receive a protocol data unit PDU session establishment request from a relay node, and send a PDU session resource establishment request to the host base station based on the PDU session establishment request.
  • the processing unit 902 can be used to control the transceiver operation of the transceiver unit 901.
  • the PDU session establishment request includes first information; the relay node supports terminal device functions and base station functions; the first information indicates that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface; the first mobility management network element provides services for the terminal device function of the relay node; the first interface is the interface between the relay node and the core network, and the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node; the PDU session resource establishment request is used to request the host base station to establish a radio bearer, the radio bearer is related to the PDU session, the radio bearer is used to transmit information of the first interface and/or the second interface, and the PDU session resource establishment request includes the first information.
  • the radio bearer includes a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the PDU session establishment request may further include an identifier of a second mobility management network element, where the second mobility management network element provides services for a base station function of the relay node.
  • the PDU session resource establishment request may further include an identifier of the second mobility management network element.
  • the processing unit 902 may also be used to determine not to initiate the establishment process of the PDU session to other core network elements; the transceiver unit 901 may be used to determine not to initiate the establishment process of the PDU session to other core network elements when the processing unit 902 determines not to initiate the establishment process of the PDU session to other core network elements.
  • the PDU session resource establishment request is sent to the host base station.
  • the transceiver unit 901 can be used to receive a PDU session resource establishment request from a first mobile management network element, and send a first message to the relay node according to the PDU session resource establishment request.
  • the processing unit 902 can be used to control the transceiver operation of the transceiver unit 901.
  • the PDU session resource establishment request includes first information; the first information indicates that the PDU session requested to be established is used to transmit information of the first interface and/or the second interface; the first interface is the interface between the relay node and the core network, and the second interface is the interface between the relay node and the first base station; the first base station is the same as or different from the host base station of the relay node; the first mobile management network element provides services for the terminal device function of the relay node; the first message is used to indicate the establishment of a wireless bearer between the relay node and the host base station, the wireless bearer is related to the PDU session, and the wireless bearer is used to transmit information of the first interface and/or the second interface.
  • the radio bearer includes a data radio bearer DRB and/or a signaling radio bearer SRB.
  • the PDU session resource establishment request may further include an identifier of the second mobility management network element, where the second mobility management network element provides services for the base station function of the relay node.
  • the first message may also be used to indicate that the radio bearer corresponds to the second mobility management network element.
  • the processing unit 902 may also be configured to save a mapping relationship between the radio bearer and the second mobility management network element.
  • the first establishment request message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides a service for the base station function of the relay node.
  • the transceiver unit 901 can also be used to send a second establishment request message of the first interface to a second mobile management network element, the second establishment request message of the first interface including the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node, and the second mobile management network element provides services for the base station function of the relay node.
  • the transceiver unit 901 can also be used to receive a second establishment response message of the first interface from the second mobility management network element, and the second establishment response message of the first interface includes the base station identifier of the relay node and/or the first interface identifier of the terminal device function of the relay node.
  • the transceiver unit 901 may also be configured to send a first establishment response message of the first interface to the relay node through the radio bearer.
  • the first establishment response message of the first interface may include an identifier of a second mobility management network element, and the second mobility management network element provides a service for the base station function of the relay node.
  • the transceiver unit 901 can also be used to receive a second message from the relay node through the wireless bearer, the second message including information of the first interface, and the second message also including a first target Internet Protocol IP address; the processing unit 902 can also be used to determine not to forward the second message when it is determined that the first target IP address is the IP address of the host base station; and/or when it is determined that the first target IP address is not the IP address of the host base station, and it is determined that the first target IP address is the IP address of the second mobile management network element, control the transceiver unit 901 to forward the second message to the second mobile management network element, and the second mobile management network element provides services for the base station function of the relay node.
  • the transceiver unit 901 may also be configured to receive a first establishment request message of a second interface from the relay node through the radio bearer.
  • the first establishment request message of the second interface may include an identifier of the first base station.
  • the transceiver unit 901 can also be used to send a second establishment request message of the second interface to the first base station, and the second establishment request message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node.
  • the transceiver unit 901 can also be used to receive a second establishment response message of the second interface from the first base station, and the second establishment response message of the second interface includes the base station identifier of the relay node and/or the second interface identifier of the terminal device function of the relay node.
  • the transceiver unit 901 may also be configured to send a first establishment response message of the second interface to the relay node through the radio bearer.
  • the first establishment response message of the second interface may include an identifier of the first base station.
  • the transceiver unit 901 may also be configured to receive a third message from the relay node, wherein the third message includes: The third message also includes information of the second interface, and the third message also includes a second target Internet Protocol IP address; the processing unit 902 can also be used to determine not to forward the third message when it is determined that the second target IP address is the IP address of the host base station; and/or, when it is determined that the second target IP address is not the IP address of the host base station, and the second target IP address is the IP address of the first base station, control the transceiver unit 901 to forward the third message to the first base station.
  • each functional unit in the embodiments of the present application may be integrated into a processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) or a processor (processor) to perform all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk and other media that can store program code.
  • the embodiments of the present application further provide a communication device.
  • the communication device 1000 may include a processor 1002.
  • the communication device 1000 may further include a transceiver 1001.
  • the communication device 1000 may further include a memory 1003.
  • the memory 1003 may be disposed inside the communication device 1000 or outside the communication device 1000.
  • the processor 1002 may control the transceiver 1001 to receive and send information, messages or data.
  • the processor 1002 may be a central processing unit (CPU), a network processor (NP) or a combination of a CPU and a NP.
  • the processor 1002 may further include a hardware chip.
  • the hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL) or any combination thereof.
  • the transceiver 1001, the processor 1002 and the memory 1003 are interconnected.
  • the transceiver 1001, the processor 1002 and the memory 1003 are interconnected via a bus 1004;
  • the bus 1004 may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus.
  • PCI Peripheral Component Interconnect
  • EISA Extended Industry Standard Architecture
  • the bus may be divided into an address bus, a data bus, a control bus and the like.
  • FIG10 is represented by only one thick line, but it does not mean that there is only one bus or one type of bus.
  • the memory 1003 is used to store programs, etc.
  • the program may include a program code, and the program code includes a computer operation instruction.
  • the memory 1003 may include a RAM, and may also include a non-volatile memory (non-volatile memory), such as one or more disk memories.
  • the processor 1002 executes the application program stored in the memory 1003 to implement the above functions, thereby realizing the functions of the communication device 1000.
  • the communication device 1000 may be the relay node in the above embodiment; may also be the first mobility management network element in the above embodiment; may also be the host base station in the above embodiment.
  • the transceiver 1001 can implement the transceiver operation performed by the relay node in the aforementioned method embodiment; the processor 1002 can implement other operations except the transceiver operation performed by the relay node in the aforementioned method embodiment.
  • the processor 1002 can implement other operations except the transceiver operation performed by the relay node in the aforementioned method embodiment.
  • the transceiver 1001 can implement the transceiver operation performed by the first mobility management network element in the aforementioned method embodiment; the processor 1002 can implement other operations except the transceiver operation performed by the first mobility management network element in the aforementioned method embodiment.
  • the processor 1002 can implement other operations except the transceiver operation performed by the first mobility management network element in the aforementioned method embodiment.
  • the transceiver 1001 can implement the transceiver operation performed by the host base station in the aforementioned method embodiment; the processor 1002 can implement other operations except the transceiver operation performed by the host base station in the aforementioned method embodiment.
  • the transceiver 1001 can implement the transceiver operation performed by the host base station in the aforementioned method embodiment; the processor 1002 can implement other operations except the transceiver operation performed by the host base station in the aforementioned method embodiment.
  • an embodiment of the present application provides a communication system, which may include the relay node, the first mobility management network element and the host base station involved in the above embodiments.
  • An embodiment of the present application further provides a computer-readable storage medium, wherein the computer-readable storage medium is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.
  • An embodiment of the present application further provides a computer program product, which is used to store a computer program.
  • the computer program When the computer program is executed by a computer, the computer can implement the communication method provided by the above method embodiment.
  • An embodiment of the present application also provides a chip, including a processor, wherein the processor is coupled to a memory and is used to call a program in the memory so that the chip implements the communication method provided by the above method embodiment.
  • An embodiment of the present application also provides a chip, which is coupled to a memory and is used to implement the communication method provided in the above method embodiment.
  • the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.
  • a 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 that can direct a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction device that implements the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.
  • These computer program instructions may also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, whereby the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one or more processes in the flowchart and/or one or more boxes in the block diagram.

Landscapes

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

Abstract

L'invention concerne un procédé et un appareil de communication destinés à être utilisés lors de l'application d'une technologie de relais NR L3. Un nœud relais envoie une demande d'établissement de session d'unité de données de protocole (PDU) à un premier élément de réseau de gestion de mobilité. Sur la base de la demande d'établissement de session de PDU, le premier élément de réseau de gestion de mobilité envoie une demande d'établissement de ressources de session de PDU à une station de base hôte. La station de base hôte envoie un premier message au nœud relais. La demande d'établissement de session de PDU contient des premières informations de façon à indiquer qu'une session de PDU objet de la demande d'établissement est utilisée pour transmettre des informations d'une première interface et/ou d'une seconde interface. Le nœud relais prend en charge une fonction de dispositif terminal et une fonction de station de base. Le premier élément de réseau de gestion de mobilité assure un service relatif à la fonction de dispositif terminal du nœud relais. La première interface est une interface entre le nœud relais et un réseau central. La seconde interface est une interface entre le nœud relais et une première station de base. Le premier message ordonne d'établir une porteuse radio entre le nœud relais et la station de base hôte. La porteuse radio est associée à la session de PDU. La porteuse radio est utilisée pour transmettre les informations de la première interface et/ou de la seconde interface.
PCT/CN2024/111549 2023-09-15 2024-08-12 Procédé et appareil de communication Pending WO2025055627A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202311205712.2 2023-09-15
CN202311205712.2A CN119653449A (zh) 2023-09-15 2023-09-15 一种通信方法及装置

Publications (1)

Publication Number Publication Date
WO2025055627A1 true WO2025055627A1 (fr) 2025-03-20

Family

ID=94944552

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2024/111549 Pending WO2025055627A1 (fr) 2023-09-15 2024-08-12 Procédé et appareil de communication

Country Status (2)

Country Link
CN (1) CN119653449A (fr)
WO (1) WO2025055627A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012142895A1 (fr) * 2011-04-18 2012-10-26 中兴通讯股份有限公司 Procédé et système de traitement de transfert de nœud de relais sans fil
CN102892153A (zh) * 2011-07-22 2013-01-23 中兴通讯股份有限公司 一种中继节点切换中释放用户终端信息的方法和系统
CN109874153A (zh) * 2017-12-01 2019-06-11 华为技术有限公司 一种传输方法和中继节点
CN111586886A (zh) * 2019-02-15 2020-08-25 华为技术有限公司 一种无线回传链路的控制方法及装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012142895A1 (fr) * 2011-04-18 2012-10-26 中兴通讯股份有限公司 Procédé et système de traitement de transfert de nœud de relais sans fil
CN102892153A (zh) * 2011-07-22 2013-01-23 中兴通讯股份有限公司 一种中继节点切换中释放用户终端信息的方法和系统
CN109874153A (zh) * 2017-12-01 2019-06-11 华为技术有限公司 一种传输方法和中继节点
CN111586886A (zh) * 2019-02-15 2020-08-25 华为技术有限公司 一种无线回传链路的控制方法及装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAMSUNG: "Discussion on Bearer mapping between UE DRB and IAB DRB", 3GPP DRAFT; R2-1804704 DISCUSSION ON BEARER MAPPING BETWEEN UE DRB AND IAB DRB, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Sanya, China; 20180416 - 20180420, 5 April 2018 (2018-04-05), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051414857 *

Also Published As

Publication number Publication date
CN119653449A (zh) 2025-03-18

Similar Documents

Publication Publication Date Title
JP7556036B2 (ja) サイドリンク中継通信に関するシグナリング伝送のためのシステムおよび方法
EP4271043A1 (fr) Procédé, appareil et système de communication
CN113207191B (zh) 基于网络切片的会话建立方法、装置、设备及存储介质
CN114071697A (zh) 终端接入公私网的方法及通信装置
KR20220044341A (ko) 보안 보호 모드 결정 방법 및 장치
CN104349303B (zh) 设备到设备连接管理方法、装置及基站
CN114731714A (zh) 一种会话建立的方法及装置
US20240196316A1 (en) Systems and methods for inhomogeneous slice support
WO2022199451A1 (fr) Procédé et appareil de commutation de session
WO2023160199A1 (fr) Procédé et appareil d'accès à un réseau de communication
CN111866872B (zh) 一种通信方法及装置
WO2022170798A1 (fr) Procédé de détermination de stratégie et appareil de communication
EP4274310A1 (fr) Procédé et appareil d'intercommunication de réseau
CN116939505A (zh) 一种通信方法及装置
WO2022148469A1 (fr) Procédé, appareil et système de protection de sécurité
WO2023202503A1 (fr) Procédé et appareil de communication
WO2025055627A1 (fr) Procédé et appareil de communication
WO2023065865A1 (fr) Procédé et dispositif de communication
WO2023197772A1 (fr) Procédé de communication et appareil associé
CN117377065A (zh) 无线通信方法、设备及存储介质
WO2025166784A1 (fr) Procédé de communication sans fil, équipement terminal et dispositif de réseau cœur
WO2024041157A1 (fr) Procédé et appareil d'enregistrement
WO2025039755A1 (fr) Procédé et appareil de communication
WO2025209303A1 (fr) Procédé de communication et appareil de communication
WO2025113265A1 (fr) Procédé de communication et appareil de communication

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: 24864350

Country of ref document: EP

Kind code of ref document: A1