WO2021163894A1 - Procédé et appareil de communication basés sur un relais - Google Patents

Procédé et appareil de communication basés sur un relais Download PDF

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Publication number
WO2021163894A1
WO2021163894A1 PCT/CN2020/075756 CN2020075756W WO2021163894A1 WO 2021163894 A1 WO2021163894 A1 WO 2021163894A1 CN 2020075756 W CN2020075756 W CN 2020075756W WO 2021163894 A1 WO2021163894 A1 WO 2021163894A1
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WO
WIPO (PCT)
Prior art keywords
information
relay
communication
indicate
ran device
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PCT/CN2020/075756
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English (en)
Chinese (zh)
Inventor
许胜锋
李濛
杨艳梅
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华为技术有限公司
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Priority to PCT/CN2020/075756 priority Critical patent/WO2021163894A1/fr
Publication of WO2021163894A1 publication Critical patent/WO2021163894A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user

Definitions

  • the present invention relates to the field of communication technology, and in particular to a relay-based communication method and device.
  • UEs communicate through the PC5 interface, which can be used for information transmission on the data plane and the control plane.
  • the first UE may communicate with the network-side server through the second UE.
  • the first UE is also called a remote UE (Remote UE)
  • the second UE is also called a relay UE (Relay UE).
  • the remote UE communicates with the relay UE
  • the relay UE communicates with the network-side RAN device
  • the RAN device accesses the Data Network (DN) through the user plane function (UPF) network element.
  • the remote UE's indirect communication through the relay UE includes two forms: indirect communication based on layer 2 relay or layer 2 evolved relay and layer 3 based relay or layer 3 relay. layer 3 evolved relay) indirect communication.
  • layer 2 relay when the indirect communication method based on layer 2 relay is used, if the first remote UE and the second remote UE access the network through the same relay UE, the data flow of the first remote UE and the second remote UE The data stream of the remote UE will be mapped to the same data radio bear (DRB) or the same logical channel of the Uu interface (the radio interface between the relay UE and the RAN device).
  • DRB data radio bear
  • the relay UE and the RAN device use adaptation layer information to identify the data stream of the first remote UE and the data of the second remote UE respectively. flow. Therefore, in indirect communication based on layer 2 relay, both the relay UE and the RAN device need to have the ability to support layer 2 relay.
  • a remote UE when a remote UE selects a relay UE, it may select a relay UE that does not support the layer 2 relay capability; or, when the remote UE accesses the network through a layer 2 relay mode, the relay The RAN device of the cell where the UE resides may not support the ability of layer 2 relay, which causes the remote UE to be unable to access the network based on the indirect communication mode of layer 2 relay, thereby affecting user experience.
  • the embodiment of the present invention provides a relay-based communication method and device.
  • an embodiment of the present application provides a relay-based communication method.
  • the method includes: a first UE (for example, a relay UE) receives first information from a RAN device, where the first information is used to indicate the RAN The device supports adaptation layer communication, and the first UE sends second information to the second UE according to the first information, and the second information is used to indicate that the first UE supports providing a relay service for the second UE (for example, a remote UE).
  • the first UE can determine that the RAN device supports the adaptation layer communication by receiving the first information from the RAN device, and send the second information to the second UE, so as to ensure that the second UE adopts the layer 2 based on the first UE.
  • the subsequent indirect communication method is connected to the network, thereby improving the user experience.
  • the present application also discloses a relay-based communication method, the method includes: a second UE (for example, a remote UE) receives first indication information.
  • the first indication information is used to indicate that the first UE (for example, a relay UE) supports the provision of adaptation layer relay services for the communication between the second UE and the first RAN device, or the first indication information is used to indicate the first
  • the RAN device supports adaptation layer communication
  • the second UE determines according to the first indication information that the first UE provides a relay service for the second UE.
  • the second UE determines the first UE according to the received first indication information, which can ensure that the second UE uses the indirect communication method based on layer 2 relay to access the network through the first UE, thereby improving user experience .
  • the second UE when the first indication information is used to indicate that the first UE supports the provision of adaptation layer relay services for communication between the second UE and the first RAN device, the second UE receives the first indication information, including : The second UE receives the first indication information from the first UE, the first indication information is determined according to the first information and the second information, the first information is used to indicate that the first RAN device supports adaptation layer communication, and the second information is used to indicate The first UE supports adaptation layer communication. In this way, the second UE can learn, according to the first indication information, that the first UE supports the provision of adaptation layer relay services for communication between the second UE and the first RAN device.
  • the second UE when the first indication information is used to indicate that the first RAN device supports communication at the adaptation layer, the second UE receives the first indication information, including: Receive the first instruction information.
  • the second UE can learn that the first RAN device supports adaptation layer communication according to the first indication information.
  • the second UE receives the second indication information
  • the second indication information is used to indicate that the third UE does not support the provision of adaptation layer relay services for the communication between the second UE and the second RAN device, or,
  • the second indication information is used to indicate that the second RAN device does not support adaptation layer communication. Therefore, the second UE will not select the third UE and the UE provides the relay service.
  • the second UE when the second indication information is used to indicate that the third UE does not support the provision of adaptation layer relay services for communication between the second UE and the second RAN device, the second UE receives the second indication information, Including: the second UE receives the second indication information from the third UE, the second indication information is determined according to the third information and/or the fourth information, the third information is used to indicate that the second RAN device does not support adaptation layer communication, and the fourth The information is used to indicate that the third UE does not support adaptation layer communication. Therefore, the second UE can learn that the third UE does not support the provision of adaptation layer relay services for communication between the second UE and the second RAN device according to the second indication information.
  • the second UE receiving the second indication information includes: The device receives the second indication information. Therefore, the second UE can learn that the second RAN device does not support adaptation layer communication according to the second indication information.
  • the present application also discloses a relay-based communication method.
  • the method includes: a UE (for example, a relay UE) receives first information from a first RAN device, and the first information is used to indicate the first RAN device Whether to support adaptation layer communication; if the first information is used to indicate that the first RAN device supports adaptation layer communication, the UE determines based on the first information to reside in the cell served by the first RAN device; or, if the first information is used to indicate The first RAN device does not support adaptation layer communication, and the UE determines to reselect a cell according to the first information.
  • a relay UE receives first information from a first RAN device, and the first information is used to indicate the first RAN device Whether to support adaptation layer communication; if the first information is used to indicate that the first RAN device supports adaptation layer communication, the UE determines based on the first information to reside in the cell served by the first RAN device; or, if the first information is used to indicate The first RAN
  • the UE when the UE selects a cell to camp on, by receiving the first information from the first RAN device of the cell, it can determine whether to camp on the cell. Through this method, it can be ensured that the first RAN device of the cell where the UE resides can support adaptation layer communication, thereby ensuring that the UE can be used as a relay UE that provides a layer 2 relay service.
  • the UE determines that the UE supports adaptation layer communication; or, the UE receives second information from the second RAN device, the second information is used to indicate that the UE is authorized to perform relay communication, and the second RAN device is in A RAN device that serves the UE before the UE accesses the first RAN device; or, the UE receives third information from the first RAN device, and the third information is used to indicate that the UE is authorized to perform relay communication.
  • this application also discloses a relay-based communication method.
  • the method includes: an AMF network element receives first information from a RAN device, the first information is used to indicate that the RAN device supports adaptation layer communication, and the AMF network element
  • the second information is received from the UE (for example, a relay UE), the second information is used to indicate that the UE supports adaptation layer communication, and the AMF network element sends the first information to the PCF network element according to the second information.
  • the RAN device 203 involved in this system is a device for providing 3GPP access functions for the relay UE 202, and is mainly responsible for functions such as radio resource management, service quality management, data compression, and encryption on the air interface side.
  • the RAN device 203 may include various forms of base stations, such as: macro base stations, micro base stations (also referred to as small stations), relay stations, and access points.
  • base stations such as: macro base stations, micro base stations (also referred to as small stations), relay stations, and access points.
  • the names of devices with base station functions may be different, such as eNB, Node B, and gNB.
  • the AMF 206 involved in this system can be responsible for terminal device registration, mobility management, and tracking area update procedures.
  • the AMF network element 206 When the AMF network element 206 provides services for the session in the terminal device, it will provide storage resources of the control plane for the session to store the session identifier, the SMF network element identifier associated with the session identifier, and so on.
  • AMF may also be called AMF equipment or AMF network element or AMF entity.
  • the embodiments of the present application may also be applicable to other future-oriented communication technologies.
  • the network architecture and business scenarios described in this application are intended to explain the technical solutions of this application more clearly, and do not constitute a limitation on the technical solutions provided by this application. Those of ordinary skill in the art will know that with the evolution of the network architecture and new business scenarios The technical solutions provided in this application are equally applicable to similar technical problems.
  • the first UE sends second information to the second UE according to the first information.
  • the second information is used to indicate that the first UE supports providing a relay service for the second UE.
  • the second UE is the remote UE in FIG. 2.
  • the manner in which the first UE supports the provision of relay services for the second UE can be combined with the control plane protocol stack of indirect communication based on layer 2 relay shown in Figure 4a and the non-direct communication based on layer 2 relay shown in Figure 4b.
  • the user plane protocol stack of direct communication is described.
  • step S302 can be implemented in any of the following three ways:
  • Manner 1 The first UE determines the second information according to the first information, and the first UE sends the second information to the second UE.
  • all relay UEs support adaptation layer communication by default. Therefore, after the first UE learns that the RAN device supports adaptation layer communication according to the first information, it is determined that the first UE can provide a relay for the second UE, so that the second UE can receive indirect communication based on the layer 2 relay. Into the network.
  • Manner 2 The first UE determines the second information according to the first information and the third information, and the first UE sends the second information to the second UE.
  • the third information is used to indicate that the first UE supports adaptation layer communication.
  • Manner 3 The first UE determines the second information according to the first information and the fourth information, and the first UE sends the second information to the second UE.
  • the fourth information is used to indicate that the first UE is authorized to perform relay communication.
  • the remote UE supporting communication at the adaptation layer can also be described as the remote UE supporting communication with the RAN device through the adaptation layer.
  • the first UE can determine that the RAN device supports adaptation layer communication by receiving the first information from the RAN device, and send the second information to the second UE, Therefore, it is ensured that the second UE accesses the network through the indirect communication mode based on the layer 2 relay through the first UE, thereby improving the user experience.
  • the Remote UE is the remote UE in Figure 2, that is, the second UE in Figure 3;
  • the Relay UE is the relay UE in Figure 2, that is, the first UE in Figure 3;
  • the RAN device is the second UE in Figure 2
  • the AMF network element is the AMF network element in Figure 2
  • the UPF network element is the UPF network element in Figure 2.
  • the first RAN device sends first information to the first UE.
  • the first UE receives the first information from the first RAN device.
  • the first information is used to indicate that the first RAN device supports adaptation layer communication.
  • For the first information reference may be made to the description of the first information in step S301 in FIG. 3, which will not be repeated here.
  • the first information may be sent through a system information broadcast (SIB) message.
  • SIB system information broadcast
  • the first UE camps on the cell served by the first RAN device.
  • the relay discovery message is used to request discovery of a relay UE that can provide a relay for the second UE.
  • the first UE determines second information.
  • the manner of determining the second information by the first UE may refer to any one of the three manners of determining the second information in step S302 in FIG. 3, which will not be repeated here.
  • the first UE sends a relay response message to the second UE.
  • step 504 is not executed.
  • the first UE after the first UE receives the relay discovery message sent by the second UE, according to the second determination that the first UE supports the provision of a relay service for the second UE, it returns a relay response message to the second UE.
  • the relay UE selected by the second UE can support the relay service based on the layer 2 relay, thereby ensuring that the second UE can access the network based on the indirect communication mode of the layer 2 relay.
  • the first UE does not return a relay response message, which can ensure that the relay UE that the second UE can select supports
  • the relay UE of layer 2 relay can save signaling.
  • the first UE determines second information.
  • the manner of determining the second information by the first UE may refer to any one of the three manners of determining the second information in step S302 in FIG. 3, which will not be repeated here.
  • the first UE sends a relay discovery message to the second UE.
  • the relayed message includes the second information in step 505.
  • step 506 is not executed.
  • the second UE performs relay selection.
  • the second UE selects the first UE as the relay UE according to the second information.
  • the method further includes: the second UE sends indication information to the first UE, and the indication information is used to notify the first UE that the second UE has selected the second UE.
  • a UE provides a relay service.
  • the first UE can determine that the RAN device supports adaptation layer communication by receiving the first information from the RAN device, and send the second information to the second UE, thereby ensuring that the second UE adopts The indirect communication method based on layer 2 relay accesses the network, thereby improving the user experience.
  • Fig. 6 is a flowchart of another relay-based communication method provided by an embodiment of the application.
  • the second UE receives first indication information, the first indication information is used to indicate that the first UE supports the provision of adaptation layer relay services for communication between the second UE and the first RAN device, or the first indication information Used to instruct the first RAN device to support adaptation layer communication; the second UE determines according to the first indication information that the first UE provides a relay service for the second UE.
  • FIG. 6 may include any of the following implementation scenarios: when the first indication information is used to indicate that the first UE supports the provision of adaptation layer relay services for communication between the second UE and the first RAN device, as shown in the scenario in FIG.
  • steps 601 to 603 are included; when the first indication information is used to indicate that the first RAN device supports adaptation layer communication, as shown in scenario d in FIG. 6, steps 604 and 605 are included.
  • FIG. 6 will be described in conjunction with FIG. 2, FIG. 3 and FIG. 5.
  • scenario c including:
  • the first RAN device sends first information to the first UE.
  • the first UE receives the first information from the first RAN device.
  • the first UE determines first indication information according to the first information and the fifth information.
  • the fifth information is used to indicate that the first UE supports adaptation layer communication.
  • the first indication information is used to indicate that the first UE supports providing an adaptation layer relay service for the communication between the second UE and the first RAN device.
  • the first UE sends first indication information to the second UE.
  • the first UE sends the first indication information to the second UE through a relay response message or a relay discovery message.
  • the first UE determines whether the first UE can provide the adaptation layer relay service for the second UE.
  • the first RAN device only forwards the indication information that the first RAN device supports adaptation layer communication through the first UE to the second UE, and the second UE determines whether the first UE can provide adaptation for the second UE. Layer relay service.
  • scenario d including:
  • the first indication information is used to indicate that the first RAN device supports adaptation layer communication.
  • the first UE sends first indication information to the second UE.
  • the first UE may send the first indication information to the second UE through a relay response message or a relay discovery.
  • This embodiment also includes step 606.
  • the second UE determines, according to the first indication information, that the first UE provides a relay service for the second UE.
  • the method further includes: the second UE knows that the first UE supports adaptation layer communication, and/or the second UE knows that the first UE is authorized to perform relay communication.
  • the second UE learns through the first indication information in step 603 or step 605 that the first UE supports adaptation layer communication, and/or the second UE learns that the first UE is authorized to perform relay communication.
  • the method for the second UE to determine that a first UE provides a relay service for the second UE may refer to the description in step 507, which will not be repeated here.
  • the second UE can select the first UE that can provide layer 2 relay according to the first indication information, thereby ensuring that the second UE adopts the indirect communication method based on layer 2 relay through the first UE Access to the network, thereby improving the user experience.
  • the method further includes either scenario e or scenario f: the second UE receives second indication information, and the second indication information is used to indicate that the third UE does not support the second UE and the second RAN device. Communication provides an adaptation layer relay service, or the second indication information is used to indicate that the second RAN device does not support adaptation layer communication.
  • the second indication information is used to indicate that the third UE does not support the provision of adaptation layer relay services for the communication between the second UE and the second RAN device, as shown in scenario c in FIG. 6, steps 607 to 609 are included;
  • steps 610 and 611 are included.
  • scenario e including:
  • the second RAN device sends third information to the third UE.
  • the third UE receives the third information from the second RAN device.
  • the third information is used to indicate that the second RAN device does not support adaptation layer communication.
  • the third information may be sent through a SIB message.
  • the third UE camps on the cell served by the second RAN device.
  • the second RAN device learns that the first UE can act as a relay according to the relay authorization information of the third UE before sending the third information, and the relay authorization information of the third UE is obtained from the PCF network element.
  • the third information may be sent through an RRC message.
  • the second RAN device receives the relay authorization information of the third UE from the PCF network element through the AMF network element, and learns that the third UE can After acting as a relay, the second RAN device sends third information to the third UE.
  • the third UE determines the second indication information according to the third information and/or the fourth information.
  • the fourth information is used to indicate that the third UE does not support adaptation layer communication.
  • the second indication information is used to indicate that the third UE does not support providing an adaptation layer relay service for the communication between the second UE and the second RAN device.
  • the third UE sends second indication information to the second UE.
  • the third UE determines whether the third UE can provide the adaptation layer relay service for the second UE.
  • the second RAN device only forwards the indication information that the second RAN device does not support adaptation layer communication to the second UE through the third UE, and the second UE determines whether the third UE can provide the second UE with adaptation information. Distribution layer relay service.
  • step 610 Since the second indication information is the same as the third information in step 607 at this time, in step 610, reference may be made to the description of sending the third information by the second RAN device to the third UE in step 607, which will not be repeated here.
  • the third UE sends second indication information to the second UE.
  • the third UE may send the second indication information to the second UE through a relay response message or a relay discovery.
  • the second UE can learn the third UE that cannot support layer 2 relay, so that when the second UE selects the relay UE, it avoids selecting the third UE, thereby ensuring that the second UE can
  • the indirect communication method based on layer 2 relay is used to access the network, thereby improving the user experience.
  • FIG. 7 is a flowchart of another relay-based communication method provided by an embodiment of the application. This method can be applied to the communication system shown in FIG. 2. With this method, when the first UE selects a cell to camp on, by receiving the sixth information from the first RAN device of the cell, it can be determined to camp on the cell or to reselect the cell. As shown in Figure 7, the method may include:
  • the first UE receives sixth information from the first RAN device, where the sixth information is used to indicate whether the first RAN device supports adaptation layer communication.
  • the first UE may be the relay UE in FIG. 2.
  • the sixth information may be sent through a SIB message or an RRC message.
  • the first UE determines based on the sixth information to camp on the cell served by the first RAN device; or, if the sixth information is used to indicate the first RAN The device does not support adaptation layer communication, and the first UE determines the cell to be reselected according to the first information.
  • the first UE determines to camp on a cell served by the first RAN device, it can also be understood that the first UE determines that the first RAN device serves the first UE.
  • the first UE also determines to camp on the cell according to the signal strength of the cell served by the first RAN device. That is, only when the sixth information is used to indicate that the first RAN device supports adaptation layer communication, and the signal strength of the cell served by the first RAN device meets the access requirements of the first UE, the first UE determines to camp on The cell. If the signal strengths of multiple cells all meet the access requirement of the first UE, the first UE determines, according to the sixth information, to camp on the cell served by the first RAN device supporting the adaptation layer communication.
  • the method further includes any one of the following three situations:
  • the first case the first UE determines that the UE supports adaptation layer communication
  • the second case the first UE receives second information from the second RAN device, the second information is used to indicate that the first UE is authorized to perform relay communication, where the second RAN device is before the UE accesses the first RAN device RAN equipment serving the first UE;
  • the third case the first UE receives third information from the first RAN device, and the third information is used to indicate that the first UE is authorized to perform relay communication. For example, when the first UE accesses the cell served by the first RAN device, it does not consider whether the first RAN device supports adaptation layer communication, and when the first UE camps on the cell successfully, it receives the relay authorization information of the first UE from the AMF, According to the sixth information, it is determined whether to continue camping on the cell or to perform cell reselection.
  • the first UE when the first UE selects a cell to camp on, by receiving the sixth information from the first RAN device of the cell, it can determine whether to camp on the cell.
  • This method can ensure that the first RAN device of the cell where the first UE resides can support adaptation layer communication, thereby ensuring that the first UE can serve as a relay UE that provides a layer 2 relay service.
  • FIG. 8 is a flowchart of another relay-based communication method provided by an embodiment of the application.
  • the PCF network element obtains the first information that the RAN device supports communication at the adaptation layer, thereby ensuring that the PCF network element is authorized to act as a relay.
  • the first UE of the UE may provide a layer 2 relay-based relay service.
  • FIG. 8 will be described in conjunction with FIG. 2 and FIG. 5.
  • the AMF network element obtains first information.
  • the RAN device sends the first information to the AMF network element.
  • the AMF network element receives the first information from the RAN device.
  • the first information is used to indicate that the RAN device supports adaptation layer communication.
  • the first information reference may be made to the description of the first information in step S301 in FIG. 3, which will not be repeated here.
  • the RAN device when the RAN device performs the N2 interface establishment process with the AMF network element, it sends the first information to the AMF network element through the interface establishment message.
  • the AMF network element determines according to the first information that the RAN device supports adaptation layer communication, and sends the first information to the first UE.
  • the network management device configures the first information to the AMF network element. For example, the network management device obtains information from the RAN device that the RAN device supports communication at the adaptation layer.
  • the AMF network element sends the first information to the PCF network element.
  • the PCF network element receives the first information from the AMF network element.
  • the AMF network element sends the first information to the PCF network element through a policy acquisition message.
  • the PCF network element determines seventh information according to the first information and the subscription information of the first UE.
  • the seventh information is used to indicate that the first UE is authorized to perform relay communication when camping in the cell served by the RAN device.
  • the seventh information is used to indicate that the first UE is authorized to camp on the cell corresponding to the RAN device to perform relay communication, or in other words, the seventh information is used to indicate that the first UE is authorized to be the second UE and the Communication between RAN devices provides relay services.
  • the PCF determines that the first UE can be authorized as a relay UE not only to consider the relay authorization information in the subscription information of the first UE, but also to determine that the RAN device accessed by the first UE supports adaptation layer communication.
  • the PCF network element obtains the subscription information of the first UE from the UDR.
  • the subscription information is used to indicate that the first UE is authorized to perform relay communication.
  • the PCF network element sends seventh information to the first UE.
  • the first UE receives the seventh information from the PCF network element.

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Abstract

La présente demande se rapporte au domaine technique de la communication sans fil, et concerne un procédé de communication basé sur un relais. Le procédé fait appel aux étapes suivantes : un premier UE reçoit des premières informations en provenance d'un dispositif RAN, les premières informations étant utilisées pour indiquer que le dispositif RAN prend en charge une communication de couche d'adaptation; et le premier UE envoie des secondes informations à un second UE en fonction des premières informations, les secondes informations étant utilisées pour indiquer que le premier UE prend en charge la fourniture d'un service de relais pour le second UE. Au moyen de la solution fournie par le présent mode de réalisation, il peut être garanti qu'un second UE peut accéder à un réseau au moyen d'un premier UE dans un mode de communication non directe de relais basé sur une couche 2, ce qui permet d'améliorer l'expérience de l'utilisateur.
PCT/CN2020/075756 2020-02-18 2020-02-18 Procédé et appareil de communication basés sur un relais WO2021163894A1 (fr)

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WO2023061048A1 (fr) * 2021-10-14 2023-04-20 华为技术有限公司 Procédé et appareil de communication, et dispositif
WO2023072046A1 (fr) * 2021-10-26 2023-05-04 上海朗帛通信技术有限公司 Procédé utilisé à des fins de communication sans fil et dispositif

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