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KR-20260066808-A - COMMUNICATION METHOD, DEVICE AND STORAGE MEDIUM FOR IMPLEMENTING SIDELINK RELAY COMMUNICATION

KR20260066808AKR 20260066808 AKR20260066808 AKR 20260066808AKR-20260066808-A

Abstract

The present application provides a communication method, equipment, and a storage medium, wherein the communication method comprises the steps of: receiving Internet Protocol (IP) data transmitted by a second communication node; mapping the IP data to a relay bearer according to a first preset mapping method and transmitting it to a third communication node.

Inventors

  • 두, 웨이창

Assignees

  • 지티이 코포레이션

Dates

Publication Date
20260512
Application Date
20210209
Priority Date
20200213

Claims (20)

  1. In a communication method applied to a first communication node, A step of receiving Internet Protocol (IP) data transmitted by a second communication node; A communication method characterized by including the step of mapping the IP data to a relay bearer according to a first preset mapping method and transmitting the mapped IP data to a third communication node.
  2. In Article 1, The first communication node selecting a Protocol Data Unit (PDU) session for the IP data is, Establishing an independent PDU session for the above IP data and transmitting the IP data over a data radio bearer (DRB) corresponding to the above PDU session; A communication method comprising one of the following: transmitting the IP data using the PDU session of the first communication node itself.
  3. In Article 1, For the case where at least two second communication nodes are connected to the same first communication node, the first preset mapping method includes one of one-to-one mapping and many-to-one mapping, wherein Herein, the one-to-one mapping instructs that IP data of different second communication nodes be transmitted through different relay air interface DRBs; and the many-to-one mapping instructs that IP data of at least two second communication nodes be mapped to and transmitted through the same relay air interface DRB.
  4. In Paragraph 3, When the first communication node and the at least two second communication nodes are connected using a New Radio Side Link Interface (NR PC5), and the second communication node and the third communication node are connected using an NR Air Interface, the many-to-one mapping is, A method of mapping IP data of at least two second communication nodes to a relay air interface DRB according to the air interface Quality of Service (QoS) rules and DRB configuration of the first communication node; A method of mapping the IP data to the relay air interface DRB based on the mapping relationship between the PC5 DRB and the air interface DRB, which are configured or pre-configured by the third communication node; A method of mapping the IP data to the relay air interface DRB based on the mapping relationship between the PC5 QoS flow and the NR air interface QoS flow configured or pre-configured by the third communication node and the configuration of the NR air interface DRB; A communication method comprising one of the following: a method of mapping the IP data to the relay air interface DRB based on the mapping relationship between the PC5 QoS flow configured or pre-configured by the third communication node and the air interface DRB.
  5. In Article 1, When the first communication node and the second communication node are connected using NR PC5, and the second communication node and the third communication node are connected using an NR air interface, before the step of receiving IP data transmitted by the second communication node, A step of receiving a relay connection request or a PC5 unicast connection request from the second communication node; A communication method further comprising the step of establishing a mapping between the air interface DRB, the downlink PC5 DRB, and the uplink and downlink data according to configuration information fed back by the third communication node.
  6. In Article 5, A communication method in which, when the first communication node and the second communication node are connected using NR PC5 and the second communication node and the third communication node are connected using NR Air Interface, the first communication node and the second communication node establish a Layer 2 link connection, and in the process of establishing a Layer 2 link connection, pre-acquired PC5 QoS information is mapped to Air Interface QoS information using a third preset mapping method.
  7. In Article 6, The above third preset mapping method is, Maps the 5th generation mobile communication technology Quality of Service Identifier (PQI) on the side link interface during the PC5 QoS flow to the completely identical air interface 5th generation mobile communication technology Quality of Service Identifier (5QI); If the above-mentioned completely identical air interface 5QI does not match the above-mentioned PQI, the 5QI value closest to the QoS attribute indicated by the above-mentioned PQI is selected from the standard 5QI list; A communication method comprising setting the guaranteed flow bit rate (GFBR) value and the maximum flow bit rate (MFBR) value during an air interface QoS flow to the GFBR value and MFBR value during the PC5 QoS flow.
  8. In Article 6 or Article 7, After mapping the aforementioned prior-acquired PC5 QoS information to the air interface QoS information, Transmitting a PDU session establishment request to the third communication node according to the air interface QoS flow—the PDU session establishment request is used to forward IP data of the second communication node—; Or, a communication method further comprising transmitting a PDU session modification request to the third communication node—the PDU session modification request is used to modify the current PDU session and carry air interface QoS information obtained after mapping.
  9. In Article 5, A communication method further comprising the step of receiving a relay air interface DRB or PC5 DRB configured by the third communication node, and a mapping relationship between PC5 data and air interface data.
  10. In Article 9, A communication method in which the first communication node and the second communication node are connected using NR PC5, and the second communication node and the third communication node are connected using NR air interface, wherein the mapping relationship between the PC5 data and the air interface data includes one of the mapping between the PC5 QoS flow and the air interface QoS flow, the mapping between the PC5 DRB and the air interface DRB, the mapping between the PC5 QoS flow and the air interface DRB, and the mapping between the PC5 DRB and the air interface QoS flow.
  11. In Article 9, When the first communication node and the second communication node are connected using NR PC5, and the second communication node and the third communication node are connected using NR Air Interface, the time period during which the third communication node configures the mapping relationship between the PC5 data and the Air Interface data for the first communication node is, After the first communication node transmits a PDU session establishment request or a PDU session modification request; After the first communication node and the second communication node establish a PC5 radio resource control (RRC) connection—the first communication node reports PC5 DRB information, and the PC5 DRB information includes at least one of a bearer identifier, a radio link layer control protocol (RLC) mode, a logical channel identifier, a logical channel priority, and an RLC-related configuration—; A communication method comprising one of the following: after the first communication node transmits sidelink user facility information (SUI) to the third communication node.
  12. In Article 4, Article 9, or Article 10, When the first communication node and the second communication node are connected using NR PC5, and the second communication node and the third communication node are connected using NR Air Interface, the mapping relationship between PC5 data and Air Interface data is, Mapping configuration of an NR PC5 QoS flow and an NR air interface QoS flow—wherein the mapping configuration of the NR PC5 QoS flow and the NR air interface QoS flow includes at least one of mapping of PC5 QoS information and air interface QoS information, and mapping of a Quality of Service flow identifier (QFI) and a PC5 flow identifier (PFI)—; Mapping configuration of an NR PC5 QoS flow and an NR air interface DRB—wherein the mapping configuration of the NR PC5 QoS flow and the NR air interface DRB includes at least one of a mapping of a PC5 PFI and an air interface DRB identifier, a mapping of a PC5 PQI and an air interface DRB priority, and a mapping of a PC5 PQI and an air interface logical channel priority—; Mapping configuration of NR PC5 DRB and NR Air Interface DRB—wherein the mapping configuration of NR PC5 DRB and NR Air Interface DRB includes at least one of the mapping of PC5 DRB priority and Air Interface DRB priority, mapping of PC5 DRB identifier and Air Interface DRB identifier, mapping of PC5 logical channel priority and Air Interface logical channel priority, and mapping of PC5 logical channel identifier and Air Interface logical channel identifier—; Mapping configuration of NR PC5 DRB and NR Uu QoS flow—wherein the mapping configuration of NR PC5 DRB and NR Uu QoS flow includes at least one of mapping between a PC5 DRB identifier and Uu QFI, mapping between a PC5 DRB priority and Uu 5QI, and mapping between a PC5 logical channel priority and Uu 5QI—; including one of The mapping of the above PC5 QoS information and air interface QoS information is, Map a 5QI in the air interface QoS flow to an identical PC5 PQI; if the identical air interface 5QI does not match the PQI, select the 5QI value closest to the QoS attribute indicated by the PQI from the standard 5QI list; and directly set the GFBR and MFBR values in the air interface QoS flow to the GFBR and MFBR values in the PC5 QoS information. A communication method comprising at least one of the following: mapping a PQI in a PC5 QoS flow to an identical air interface 5QI; if the identical air interface 5QI does not match the PQI, selecting the PQI value closest to the QoS attribute indicated by the 5QI from a standard PQI list; and directly setting the GFBR value and MFBR value in the PC5 QoS flow to the GFBR value and MFBR value in Uu QoS information.
  13. In Paragraph 3, When the first communication node and the at least two second communication nodes are connected using Long Term Evolution (LTE) PC5, and the at least two second communication nodes and the third communication node are connected using an NR air interface, the many-to-one mapping is, A method of mapping IP data of at least two second communication nodes to a relay NR air interface DRB according to the air interface uplink QoS rule and DRB configuration of the first communication node; A method of mapping the IP data to the relay NR air interface DRB based on the mapping relationship between the LTE PC5 logical channel configured or pre-configured by the third communication node and the NR air interface DRB; A method for mapping IP data of the second communication node to an air interface QoS flow and mapping it to a relay NR air interface DRB based on the proximity service packet priority (PPPP) value of the PC5 data of the received second communication node, the mapping relationship between the PPPP and 5QI configured or pre-configured by the third communication node, and the NR air interface DRB configuration; A communication method comprising one of the following: a method of mapping IP data of a second communication node to a relay NR air interface DRB based on the PPPP value of PC5 data of a received second communication node, and the mapping relationship between the PPPP value configured or pre-configured by the third communication node and the NR air interface DRB.
  14. In Article 1, When the first communication node and the second communication node are connected using LTE PC5, and the second communication node and the third communication node are connected using an NR air interface, prior to the step of receiving IP data transmitted by the second communication node, A step of receiving a relay connection request or a PC5 unicast connection request from the second communication node; A communication method further comprising the step of establishing a mapping of air interface DRB, uplink, and downlink data according to configuration information fed back by the third communication node.
  15. In Article 14, A communication method in which, when the first communication node and the second communication node are connected using LTE PC5 and the second communication node and the third communication node are connected using an NR air interface, the first communication node and the second communication node establish a Layer 2 link connection, and a pre-acquired PC5 PPPP value is mapped to NR air interface QoS information using a fourth preset mapping method.
  16. In Article 15, The above-mentioned fourth preset mapping method is, A communication method comprising based on a PPPP-5QI mapping table configured by or pre-configured by the third communication node.
  17. In Article 15 or Article 16, After mapping the aforementioned prior-acquired PC5 PPPP value to the NR air interface QoS information, Transmitting a PDU session establishment request to the third communication node according to the above NR air interface QoS information—wherein the PDU session establishment request is used to forward IP data of the second communication node—; Or, a communication method further comprising transmitting a PDU session modification request to the third communication node—wherein the PDU session modification request is used to modify the current PDU session and carry NR air interface QoS information obtained after mapping.
  18. In Article 14, A communication method further comprising the step of receiving a relay air interface DRB configured by the third communication node, and a mapping relationship between PC5 data and air interface data.
  19. In Article 18, A communication method in which the first communication node and the second communication node are connected using LTE PC5, and the second communication node and the third communication node are connected using an NR air interface, wherein the mapping relationship between the PC5 data and the air interface data includes one of the mapping between the PC5 logical channel and the air interface DRB, the mapping between the PC5 PPPP data flow and the air interface DRB, and the mapping between the PC5 PPPP data flow and the Uu QoS flow.
  20. In Article 19, When the first communication node and the second communication node are connected using LTE PC5, and the second communication node and the third communication node are connected using an NR air interface, the time period during which the third communication node configures the mapping relationship between the PC5 data and the air interface data for the first communication node is, After the first communication node transmits a PDU session establishment request or a PDU session modification request; After the first communication node establishes a relay connection with the second communication node—wherein the first communication node reports LTE PC5 logical channel information, and the LTE PC5 logical channel information includes at least one of an RLC mode, a logical channel identifier, a logical channel priority, and an RLC-related configuration—; A communication method comprising one of the following: after the first communication node transmits the SUI to the third communication node.

Description

Communication method, device and storage medium for implementing sidelink relay communication The present application relates to communication, for example, to communication methods, equipment, and storage media. With the advancement of radio multimedia traffic, people's demand for high data rates and user experiences is increasing day by day, and consequently, high demands are being placed on the system capacity and coverage of cellular networks. To support a wider range of network communication, Side Link (SL)-based relay communication technology is receiving widespread attention. How to perform relay communication in 5G New Radio (NR) systems is an urgent problem that needs to be solved. FIG. 1 is a flowchart of a communication method provided in an embodiment of the present application. FIG. 2 is a flowchart of another communication method provided in an embodiment of the present application. FIG. 3 is a schematic diagram showing a user plane protocol stack provided in an embodiment of the present application. FIG. 4 is a schematic diagram of the process of establishing an air interface data forwarding bearer when a relay UE provided in an embodiment of the present application forwards data for a remote UE. FIG. 5 is a schematic diagram illustrating another user plane protocol stack provided in an embodiment of the present application. FIG. 6 is a schematic diagram of the process of establishing an air interface data forwarding bearer when another relay UE provided in an embodiment of the present application forwards data for a remote UE. FIG. 7 is a schematic diagram illustrating another user plane protocol stack provided in an embodiment of the present application. FIG. 8 is a schematic diagram of the process of establishing an air interface data forwarding bearer when another relay UE provided in an embodiment of the present application forwards data for a remote UE. FIG. 9 is a structural block diagram of a communication device provided in an embodiment of the present application. FIG. 10 is a structural block diagram of another communication device provided in an embodiment of the present application. FIG. 11 is a schematic diagram of the structure of the equipment provided in an embodiment of the present application. Hereinafter, embodiments of the present application will be described in combination with the attached drawings. Application scenarios such as public safety, social networks, proximity data sharing, and local advertising increase the demand from people who wish to identify and communicate with nearby people or objects. Cellular networks centered around base stations have significant limitations in terms of supporting high data rates and proximity services; against this backdrop of demand, Device-to-Device (D2D) communication technology has emerged to meet the needs of the times. The application of D2D technology reduces the burden on cellular networks, decreases battery power consumption of user devices, improves data rates, enhances the robustness of network infrastructure, and effectively satisfies the requirements for the aforementioned high data rate traffic and proximity services. D2D technology is also referred to as Proximity Services (ProSe) or Side Link (SL) communication; the interface between devices is the PC5 interface. SideLink-based relay communication technology is receiving widespread attention to support a wider range of network communication. Based on the target of communication, SideLink communication technology can be classified as follows. 1) User Equipment-to-Network Relay (UE-to-Network relay): This communication technology supports providing data relay functions to UEs in areas that base stations cannot cover or where base station coverage capabilities are weak. Here, a UE that has a demand for communication with a base station but cannot connect directly to the base station is called a remote UE, and a UE that provides relay functions to a remote UE is called a relay UE. 2) User Facility-to-User Facility Relay (UE-to-UE relay): This communication technology supports communication between UEs through another supporting UE, provided that two UEs with communication needs do not have direct communication capabilities or conditions for direct communication. Here, the UE with communication needs is a remote UE, and the UE that provides relay functions to the remote UE is called a relay UE. Based on the implementation of relay technology, SideLink relay communication technology can be divided as follows. 1) In Internet Protocol (IP) layer-3 based relay technology, that is, the relay UE completes data forwarding based on the IP information of the data packet (e.g., IP address and port number), and the remote UE does not establish a Radio Resource Control (RRC) connection with the base station (gNB) and does not establish a connection with the core network. 2) Access layer-based (Layer 2-based) relay technology, that is, the remote UE establishes a connection with the