WO2020164614A1 - Informations d'assistance ainsi que procédé et appareil pour les distribuer - Google Patents

Informations d'assistance ainsi que procédé et appareil pour les distribuer Download PDF

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Publication number
WO2020164614A1
WO2020164614A1 PCT/CN2020/075359 CN2020075359W WO2020164614A1 WO 2020164614 A1 WO2020164614 A1 WO 2020164614A1 CN 2020075359 W CN2020075359 W CN 2020075359W WO 2020164614 A1 WO2020164614 A1 WO 2020164614A1
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WIPO (PCT)
Prior art keywords
information
ran device
tunnel
logical channel
data packet
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PCT/CN2020/075359
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English (en)
Chinese (zh)
Inventor
韩锋
杨旭东
晋英豪
杨水根
谭巍
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华为技术有限公司
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Publication of WO2020164614A1 publication Critical patent/WO2020164614A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states

Definitions

  • the present invention relates to the field of wireless communication, in particular to a method and device for auxiliary information and its transmission.
  • 5G fifth generation wireless communication technology
  • 5G will support diversified application requirements, including support for higher-rate experience and greater bandwidth access capabilities, lower latency and high-reliability information interaction, and the connection of larger-scale and low-cost machine-type communication devices. Entry and management, etc.
  • 5G will support various vertical industry application scenarios such as the Internet of Vehicles, emergency communications, and industrial Internet.
  • Ultra-Reliable and Low Latency Communications is an important communication type in 5G.
  • URLLC is a communication service that requires high latency and reliability. For example, it is used in scenarios such as unmanned driving and telemedicine.
  • the user plane delay requirement of this type of service needs to reach 0.5ms for uplink/downlink transmission; for 32-byte transmission, the reliability needs to reach 1-10 -5 when the user plane delay is 1ms.
  • the same data packet can be repeatedly transmitted on the air interface to improve the reliability and robustness of data transmission.
  • the terminal device can be wirelessly connected to two base stations at the same time, and transmit the same data packet simultaneously through its wireless links with the two base stations. How to make full use of the capabilities of the base station to achieve high-efficiency repetitive transmission, there is currently no appropriate solution.
  • the embodiment of the present application provides an auxiliary information and a method for transferring it, which effectively supports the RAN device to make a data packet repetition decision.
  • the present application provides an information transfer method for data packet repetition, including: a first radio access network RAN device determines first information, the first information includes information about at least one logical channel in the first RAN device Information; the first RAN device sends the first information to the second RAN device, and the first information is used to indicate that the data packet of the first RAN device repeats auxiliary information.
  • the method provided by the embodiment of the present application realizes that the first RAN device sends the data packet repetition auxiliary information to the second RAN device at the granularity of a logical channel, so that the second RAN device can obtain richer information of the first RAN device. Make decisions about packet duplication more efficiently. For example, the second RAN device may decide to activate one or more logical channels of the first RAN device to perform data packet repetition according to the data packet repetition auxiliary information.
  • the information of the at least one logical channel includes at least one of the following information: the logical channel identifier of the at least one logical channel, the logical channel index of the at least one logical channel, and the at least one logical channel
  • one logical channel corresponds to one tunnel.
  • the first information is assistance information data
  • the assistance information data includes packet data convergence layer protocol PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel or the at least one tunnel where the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality assistance information includes wireless quality assistance information of the at least one logical channel of the first RAN device, or wireless quality assistance information of at least one logical channel corresponding to the at least one tunnel.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes at least two One bit of information, and the at least two bits of information are used to indicate the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated.
  • the identification information of the activated logical channel or tunnel can be transmitted with the smallest possible change and information overhead.
  • the second RAN device is a managed PDCP entity node, and the first RAN device is a corresponding node; or the second RAN device is a centralized unit CU, and the first RAN device is a distributed unit DU .
  • the first RAN device receives the downlink data packet sent by the second RAN device through the at least one tunnel.
  • the downlink data packet has the same PDCP sequence number.
  • the first RAN device receives the downlink data packet from the second RAN device through the corresponding tunnel, which can ensure that the corresponding RLC entity in the first RAN device correctly receives the data packet that needs to be repeated.
  • that the first RAN device sends the first information to the second RAN device includes: the first RAN device sends the first information to the second RAN device via a third RAN device.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the first RAN device receives the downlink data packet sent by the third RAN device through the at least one tunnel.
  • the downlink data packet has the same PDCP sequence number.
  • the first RAN device receives the downlink data packet from the third RAN device performing the user plane function through the corresponding tunnel, which can ensure the corresponding RLC in the first RAN device The entity correctly receives data packets that need to be repeated.
  • the present application provides an information transfer method for data packet repetition, including: a first radio access network RAN device determines first information, the first information includes at least one logical channel group in the first RAN device The one logical channel group includes at least one logical channel; the first RAN device sends the first information to the second RAN device, and the first information is used to indicate the data packet repetition auxiliary information of the first RAN device.
  • the method provided in the embodiments of the present application realizes that the first RAN device sends the data packet repetition auxiliary information to the second RAN device at the granularity of a logical channel group, so that the second RAN device can obtain richer information of the first RAN device.
  • the decision of data packet repetition can be made more effectively.
  • the second RAN device may decide to activate a certain logical channel group of the first RAN device for data packet repetition according to the data packet repetition auxiliary information.
  • the granularity of logical channel groups is used to form data packets to repeat auxiliary information, which can effectively reduce information overhead.
  • the information of the at least one logical channel group includes at least one of the following information: the logical channel group identifier of the at least one logical channel group, the logical channel group index of the at least one logical channel group, The wireless quality auxiliary information of the at least one logical channel group, the tunnel identifier of the at least one tunnel group corresponding to the at least one logical channel group, the tunnel group index of the at least one tunnel group, and the downlink tunnel transport layer address of the at least one tunnel group And the tunnel endpoint identification TEID.
  • a logical channel group corresponds to a tunnel group.
  • a logical channel group may be any combination of logical channels in the first RAN device; or, a tunnel group may be any combination of tunnels in the first RAN device.
  • a logical channel group can be any combination of one or more specific logical channels in the first RAN device and other logical channels; or, a tunnel group can be one of the first RAN device. Or any combination of multiple specific tunnels and other tunnels.
  • the first information is assistance information data
  • the assistance information data includes PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated.
  • the radio quality auxiliary information includes radio quality auxiliary information of the at least one logical channel group of the first RAN device, or radio quality of at least one logical channel group corresponding to the at least one tunnel group Supplementary information.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes At least two bits of information, where the at least two bits of information are used to indicate the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality auxiliary information of the at least one logical channel group includes the wireless quality auxiliary information of each logical channel in the at least one logical channel group or the wireless quality auxiliary information of each logical channel is mathematically calculated Wireless quality auxiliary information.
  • the identification information of the activated logical channel group or tunnel group can be transmitted with the smallest possible change and information overhead.
  • the second RAN device is a managed PDCP entity node, and the first RAN device is a corresponding node; or the second RAN device is a centralized unit CU, and the first RAN device is a distributed unit DU .
  • the first RAN device receives the downlink data packet sent by the second RAN device through the at least one tunnel group.
  • the downlink data packet has the same PDCP sequence number.
  • the first RAN device receives the downlink data packet from the second RAN device through the corresponding tunnel group, which can ensure that the corresponding RLC entity in the first RAN device correctly receives the data packet that needs to be repeated.
  • that the first RAN device sends the first information to the second RAN device includes: the first RAN device sends the first information to the second RAN device via a third RAN device.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the first RAN device receives the downlink data packet sent by the third RAN device through the at least one tunnel group.
  • the downlink data packet has the same PDCP sequence number.
  • the first RAN device receives the downlink data packet from the third RAN device performing the user plane function through the corresponding tunnel group, which can ensure that the corresponding The RLC entity correctly receives data packets that need to be repeated.
  • this application provides an information transfer method for data packet repetition, including: a second radio access network RAN device receives first information sent by a first RAN device, and the first information includes the first RAN device The first information is used to indicate the data packet repetition auxiliary information of the first RAN device; the second RAN device decides the data packet repetition according to the first information.
  • the method provided in the embodiments of the present application realizes that the second RAN device receives the data packet repetition auxiliary information sent by the first RAN device at the granularity of a logical channel, so that the second RAN device can obtain richer information of the first RAN device.
  • the decision of data packet repetition can be made more effectively.
  • the second RAN device may decide to activate one or more logical channels of the first RAN device to perform data packet repetition according to the data packet repetition auxiliary information.
  • the information of the at least one logical channel includes at least one of the following information: the logical channel identifier of the at least one logical channel, the logical channel index of the at least one logical channel, and the at least one logical channel
  • one logical channel corresponds to one tunnel.
  • the first information is assistance information data
  • the assistance information data includes packet data convergence layer protocol PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel or the at least one tunnel where the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality assistance information includes wireless quality assistance information of the at least one logical channel of the first RAN device, or wireless quality assistance information of at least one logical channel corresponding to the at least one tunnel.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes at least two One bit of information, and the at least two bits of information are used to indicate the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated.
  • the identification information of the activated logical channel or tunnel can be transmitted with the smallest possible change and information overhead.
  • the second RAN device decides data packet repetition according to the first information, including: the second RAN device decides to activate the at least one logical channel or the data of the at least one tunnel according to the first information The package is repeated.
  • the second RAN device makes a finer data packet repetition decision with the granularity of the logical channel or tunnel, and can better utilize the resources of the first RAN device for data packet repetition.
  • the second RAN device is a managed PDCP entity node, and the first RAN device is a corresponding node; or the second RAN device is a centralized unit CU, and the first RAN device is a distributed unit DU .
  • the second RAN device sends a downlink data packet to the first RAN device through the at least one tunnel.
  • the downlink data packet has the same PDCP sequence number.
  • the second RAN device sends a downlink data packet to the first RAN device through the corresponding tunnel, which can ensure that the corresponding RLC entity in the first RAN device correctly receives the data packet that needs to be repeated.
  • that the second RAN device receives the first information sent by the first RAN device includes: the second RAN device receives the first information sent by the first RAN device via a third RAN device.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the second RAN device sends data packet repeated transmission information to the third RAN device, where the data packet repeated transmission information includes transmission information of the at least one logical channel, and the data packet is used for repeated transmission information. Instruct the third RAN device to send downlink data to the first RAN device according to the data packet repeated transmission information.
  • the transmission information of the at least one logical channel includes at least one of the following information: the logical channel identifier of the at least one logical channel, the logical channel index of the at least one logical channel, the at least one logical channel The tunnel identifier of the at least one tunnel corresponding to the channel, the tunnel index of the at least one tunnel, and the downlink tunnel transport layer address and TEID of the at least one tunnel.
  • the second RAN device when the second RAN device only performs control plane functions, the second RAN device instructs the third RAN device performing user plane functions to send downlink data packets to the first RAN device through the corresponding tunnel, which can ensure that the first RAN The corresponding RLC entity in the device correctly receives the data packets that need to be repeated.
  • this application provides an information transfer method for data packet repetition, including: a second radio access network RAN device receives first information sent by a first RAN device, and the first information includes the first RAN device Information of at least one logical channel group in the RAN, the logical channel group includes at least one logical channel; the first information is used to indicate the data packet repetition auxiliary information of the first RAN device; the second RAN device makes a decision based on the first information The data packet is duplicated.
  • the method provided by the embodiments of the present application enables the second RAN device to receive the data packet repetition auxiliary information sent by the first RAN device at the granularity of the logical channel group, so that the second RAN device can obtain richer information of the first RAN device , Can make the decision of data packet repetition more effectively.
  • the second RAN device may decide to activate one or more logical channels of the first RAN device to perform data packet repetition according to the data packet repetition auxiliary information.
  • the granularity of logical channel groups is used to form data packets to repeat auxiliary information, which can effectively reduce information overhead.
  • the information of the at least one logical channel group includes at least one of the following information: the logical channel group identifier of the at least one logical channel group, the logical channel group index of the at least one logical channel group, The wireless quality auxiliary information of the at least one logical channel group, the tunnel group identifier of the at least one tunnel group corresponding to the at least one logical channel group, the tunnel group index of the at least one tunnel group, and the downlink tunnel transmission layer of the at least one tunnel group Address and tunnel endpoint identification TEID.
  • a logical channel group corresponds to a tunnel group.
  • a logical channel group may be any combination of logical channels in the first RAN device; or, a tunnel group may be any combination of tunnels in the first RAN device.
  • a logical channel group can be any combination of one or more specific logical channels in the first RAN device and other logical channels; or, a tunnel group can be one of the first RAN device. Or any combination of multiple specific tunnels and other tunnels.
  • the first information is assistance information data
  • the assistance information data includes PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel or the at least one tunnel where the activation data packet suggested by the first RAN device is repeated.
  • the radio quality auxiliary information includes radio quality auxiliary information of the at least one logical channel group of the first RAN device, or radio quality of at least one logical channel group corresponding to the at least one tunnel group Supplementary information.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes At least two bits of information, where the at least two bits of information are used to indicate the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality auxiliary information of the at least one logical channel group includes the wireless quality auxiliary information of each logical channel in the at least one logical channel group or the wireless quality auxiliary information of each logical channel is mathematically calculated Wireless quality auxiliary information.
  • the identification information of the activated logical channel group or tunnel group can be transmitted with the smallest possible change and information overhead.
  • the second RAN device decides to repeat the data packet according to the first information, including: the second RAN device decides to activate the at least one logical channel group or the at least one tunnel group according to the first information
  • the packet is duplicated.
  • the second RAN device makes a finer data packet repetition decision at the granularity of the logical channel group or tunnel group, and can better utilize the resources of the first RAN device for data packet repetition.
  • the second RAN device is a managed PDCP entity node, and the first RAN device is a corresponding node; or the second RAN device is a centralized unit CU, and the first RAN device is a distributed unit DU .
  • the second RAN device sends a downlink data packet to the first RAN device through the at least one tunnel group.
  • the downlink data packet has the same PDCP sequence number.
  • the second RAN device sends a downlink data packet to the first RAN device through the corresponding tunnel group, which can ensure that the corresponding RLC entity in the first RAN device correctly receives the data packet that needs to be repeated.
  • that the second RAN device receives the first information sent by the first RAN device includes: the second RAN device receives the first information sent by the first RAN device via a third RAN device.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the second RAN device sends data packet repeated transmission information to the third RAN device, the data packet repeated transmission information includes transmission information of the at least one logical channel group, and the data packet repeated transmission information It is used to instruct the third RAN device to send downlink data to the first RAN device according to the data packet repeated transmission information.
  • the transmission information of the at least one logical channel group includes at least one of the following information: the logical channel group identifier of the at least one logical channel group, the logical channel group index of the at least one logical channel group , The tunnel group identifier of the at least one tunnel group corresponding to the at least one logical channel group, the tunnel group index of the at least one tunnel group, and the downlink tunnel transport layer address and TEID of the at least one tunnel group.
  • the second RAN device instructs the third RAN device performing the user plane function to send downlink data packets to the first RAN device through the corresponding tunnel group, which can ensure that the first The corresponding RLC entity in the RAN device correctly receives the data packets that need to be repeated.
  • the present application provides an information transfer method for data packet repetition, including: a third radio access network RAN device receives first information sent by a first RAN device, and the first information includes the first RAN device Information of at least one logical channel in the RAN; the first information is used to indicate the data packet repetition auxiliary information of the first RAN device; the third RAN device sends the first information to the second RAN device.
  • the method provided in the embodiments of the present application realizes that the first RAN device sends the data packet repetition auxiliary information to the second RAN device through the third RAN device at the granularity of a logical channel, so that the second RAN device can obtain the update of the first RAN device. Abundant information can make data packet repetition decisions more effectively.
  • the information of the at least one logical channel includes at least one of the following information: the logical channel identifier of the at least one logical channel, the logical channel index of the at least one logical channel, and the at least one logical channel
  • one logical channel corresponds to one tunnel.
  • the first information is assistance information data
  • the assistance information data includes PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel or the at least one tunnel where the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality assistance information includes wireless quality assistance information of the at least one logical channel of the first RAN device, or wireless quality assistance information of at least one logical channel corresponding to the at least one tunnel.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes at least two One bit of information, and the at least two bits of information are used to indicate the at least one logical channel or the at least one tunnel in which the activation data packet suggested by the first RAN device is repeated.
  • the identification information of the activated logical channel or tunnel can be transmitted with the smallest possible change and information overhead.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the third RAN device receives the data packet repeated transmission information sent by the second RAN device, the data packet repeated transmission information includes transmission information of the at least one logical channel, and the data packet repeated transmission information It is used to instruct the third RAN device to send downlink data to the first RAN device according to the data packet repeated transmission information.
  • the transmission information of the at least one logical channel includes at least one of the following information: the logical channel identifier of the at least one logical channel, the logical channel index of the at least one logical channel, and the at least one logical channel
  • the tunnel identifier of the at least one tunnel corresponding to the channel, the tunnel index of the at least one tunnel, and the downlink tunnel transport layer address and TEID of the at least one tunnel.
  • the third RAN device sends a downlink data packet to the first RAN device through the at least one tunnel.
  • the downlink data packet has the same PDCP sequence number.
  • the third RAN device performing the user plane function receives the instruction from the second RAN device and sends the downlink data packet to the first RAN device through the corresponding tunnel, which can guarantee The corresponding RLC entity in the first RAN device correctly receives the data packets that need to be repeated.
  • this application provides an information transfer method for data packet repetition, including: a third radio access network RAN device receives first information sent by a first RAN device, and the first information includes the first RAN device Information of at least one logical channel group in the RAN, the logical channel group includes at least one logical channel; the first information is used to indicate the data packet repetition auxiliary information of the first RAN device; the third RAN device sends to the second RAN device The first information.
  • the method provided by the embodiment of the present application realizes that the first RAN device sends the data packet repetition assistance information to the second RAN device through the third RAN device at the granularity of logical channel groups, so that the second RAN device can obtain the first RAN device. Richer information enables more effective decision-making on data packet repetition.
  • the granularity of logical channel groups is used to form data packets to repeat auxiliary information, which can effectively reduce information overhead.
  • the information of the at least one logical channel group includes at least one of the following information: the logical channel group identifier of the at least one logical channel group, the logical channel group index of the at least one logical channel group, The wireless quality auxiliary information of the at least one logical channel group, the tunnel group identifier of the at least one tunnel group corresponding to the at least one logical channel group, the tunnel group index of the at least one tunnel group, and the downlink tunnel transmission layer of the at least one tunnel group Address and tunnel endpoint identification TEID.
  • a logical channel group corresponds to a tunnel group.
  • a logical channel group may be any combination of logical channels in the first RAN device; or, a tunnel group may be any combination of tunnels in the first RAN device.
  • a logical channel group can be any combination of one or more specific logical channels in the first RAN device and other logical channels; or, a tunnel group can be one of the first RAN device. Or any combination of multiple specific tunnels and other tunnels.
  • the first information is assistance information data
  • the assistance information data includes PDCP duplication activation suggestion (PDCP duplication activation suggestion) and radio quality assistance information (radio At least one of quality assistance information).
  • auxiliary information data of the existing standard to transfer the repeated auxiliary information of the data packet can be better compatible with the existing standard.
  • the PDCP repeated activation suggestion is used to indicate the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated.
  • the radio quality auxiliary information includes radio quality auxiliary information of the at least one logical channel group of the first RAN device, or radio quality of at least one logical channel group corresponding to the at least one tunnel group Supplementary information.
  • the PDCP repeated activation suggestion is used to indicate that the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated includes: the PDCP repeated activation suggestion includes At least two bits of information, where the at least two bits of information are used to indicate the at least one logical channel group or the at least one tunnel group in which the activation data packet suggested by the first RAN device is repeated.
  • the wireless quality auxiliary information of the at least one logical channel group includes the wireless quality auxiliary information of each logical channel in the at least one logical channel group or the wireless quality auxiliary information of each logical channel is subjected to a mathematical operation Wireless quality auxiliary information.
  • the identification information of the activated logical channel or tunnel can be transmitted with the smallest possible change and information overhead.
  • the second RAN device is a centralized unit control plane network element CU-CP
  • the first RAN device is a distributed unit DU
  • the third RAN device is a centralized unit user plane network element CU-CP.
  • the third RAN device receives the data packet repeated transmission information sent by the second RAN device, the data packet repeated transmission information includes transmission information of the at least one logical channel group, and the data packet is repeatedly transmitted The information is used to instruct the third RAN device to send downlink data to the first RAN device according to the data packet repeated transmission information.
  • the transmission information of the at least one logical channel group includes at least one of the following information: the logical channel group identifier of the at least one logical channel group, the logical channel group index of the at least one logical channel group , The tunnel group identifier of the at least one tunnel group corresponding to the at least one logical channel group, the tunnel group index of the at least one tunnel group, and the downlink tunnel transport layer address and TEID of the at least one tunnel group.
  • the third RAN device sends a downlink data packet to the first RAN device through the at least one tunnel group.
  • the downlink data packet has the same PDCP sequence number.
  • the third RAN device performing the user plane function receives the instruction from the second RAN device, and sends the downlink data packet to the first RAN device through the corresponding tunnel group. Ensure that the corresponding RLC entity in the first RAN device correctly receives data packets that need to be repeated.
  • an access network RAN device which is used to implement the first aspect or any one of the possible implementation manners of the first aspect, or the second aspect or any one of the possible implementation manners of the second aspect
  • the RAN device may include a method for executing the method in the first aspect or any one of the possible implementation manners of the first aspect, or the second aspect or any one of the possible implementation manners of the second aspect unit.
  • another access network RAN device is provided, which is used to implement the third aspect or any possible implementation manner of the third aspect, or any possible implementation manner of the fourth aspect or the fourth aspect
  • the RAN device may include a method for executing the third aspect or any one of the possible implementation manners of the third aspect, or any one of the fourth aspect or the fourth aspect. Unit.
  • the ninth aspect provides yet another access network RAN device, which is used to implement the fifth aspect or any possible implementation manner of the fifth aspect, or the sixth aspect or any possible implementation manner of the sixth aspect
  • the RAN device may include a method for executing the fifth aspect or any possible implementation manner of the fifth aspect, or the sixth aspect or any possible implementation manner of the sixth aspect Unit.
  • a computer program product includes: computer program code, when the computer program code is used by a communication unit, a processing unit or a transceiver of a communication device (for example, an access network device or a terminal device) When the processor is running, the communication device is caused to execute the method in any one of the first to sixth aspects or any one of the first to sixth aspects.
  • a computer-readable storage medium stores a program that enables a computer to execute any possible implementation of the first to sixth aspects or the first to sixth aspects The method in the way.
  • Fig. 1 is a schematic diagram of a wireless communication system provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of the architecture of a gNB divided into CU and DU according to an embodiment of the present application;
  • FIG. 3 is a schematic diagram of a protocol stack of a user plane layer 2 of a RAN device provided by an embodiment of the present application;
  • FIG. 4 is a schematic diagram of a user plane L2 protocol stack for data packet repetition when each RAN device has a carrier aggregation function in a dual connectivity scenario according to an embodiment of the present application;
  • FIG. 5 is a schematic flowchart of an improved auxiliary information and its transmission method in a dual connection scenario provided by an embodiment of the present application
  • FIG. 6 is a schematic diagram of a user plane layer 2 protocol stack used for data packet repetition under a RAN device architecture divided into CU and DU according to an embodiment of the present application;
  • FIG. 7 is a schematic flowchart of an improved auxiliary information and its transmission method in another dual-connection scenario provided by an embodiment of the present application.
  • FIG. 8 is a schematic flowchart of another improved auxiliary information and its transmission method in a dual-connection scenario provided by an embodiment of the present application.
  • FIG. 9 is a schematic block diagram of a first network device according to an embodiment of the present application.
  • FIG. 10 is another schematic block diagram of the first network device according to an embodiment of the present application.
  • FIG. 11 is a schematic block diagram of a second network device according to an embodiment of the present application.
  • FIG. 12 is another schematic block diagram of a second network device according to an embodiment of the present application.
  • FIG. 13 is a schematic block diagram of a third network device according to an embodiment of the present application.
  • FIG. 14 is another schematic block diagram of a third network device provided by an embodiment of the present application.
  • system and "network” in this article are often used interchangeably in this article.
  • LTE Long Term Evolution
  • 5G fifth generation
  • NR new radio
  • NG next generation
  • future mobile communication system etc.
  • a terminal device is connected to a radio access network (RAN) device through a wireless link, and communicates with other terminal devices via the core network (CN) device connected to the RAN device. Communication or access to wireless Internet, etc.
  • RAN radio access network
  • CN core network
  • a terminal device is wirelessly connected with a RAN device to achieve communication.
  • one terminal device can also be wirelessly connected with two RAN devices to achieve communication.
  • Fig. 1 shows a schematic diagram of a wireless communication system 100 provided by an embodiment of the present application.
  • the terminal device 120 is wirelessly connected with the RAN device 140 through the air interface 160.
  • the wireless communication system further includes the terminal device 120 wirelessly connecting with the RAN device 142 through the air interface 162.
  • the RAN device 140 is called a master node (master node, MN), and the RAN device 142 is called a secondary node (secondary node, SN).
  • the RAN device 140 realizes the transmission of user plane (UP) data with the 5G core network (5G core, 5GC) 180 through the NG user plane (NG-U) interface, and through the NG control plane (NG control plane).
  • NG-C NG control plane
  • CP control plane
  • the RAN device 142 realizes the transmission of user plane data with the 5GC device 180 through the NG-U interface.
  • the RAN device 140 and the RAN device 142 realize the interaction of control plane data through the Xn control plane (Xn-C) interface, and realize the interaction of user plane data through the Xn user plane (Xn-U) interface .
  • MN 140 is connected to the access and mobility management function (AMF) network element in 5GC 180 through the NG-C interface
  • MN 140 and SN 142 are connected to 5GC 180 through the NG-U interface.
  • AMF access and mobility management function
  • the user plane function (UPF) network element connection in the case that the terminal device has a wireless connection with two RAN devices, the user plane data sent by the two RAN devices to the terminal device can be transmitted over the air interface through multiple wireless links, and each wireless link can transmit the same Data packets, thereby improving the reliability of data transmission.
  • UPF user plane function
  • the RAN device shown in Figure 1 can be a next-generation base station, such as next-generation Node B (gNB) or next-generation evolved Node B (ng-eNB) ), etc., it may also be an access point (AP) in a wireless local area network (Wireless Local Area Networks, WLAN), or an evolved base station (evolved Node B, eNB or eNodeB) in LTE, or a relay station or access point Point, or vehicle-mounted device, wearable device, and transmission and reception point (TRP), etc.
  • next-generation base station such as next-generation Node B (gNB) or next-generation evolved Node B (ng-eNB)
  • AP access point
  • WLAN wireless Local Area Networks
  • evolved Node B, eNB or eNodeB evolved base station
  • eNodeB evolved Node B
  • TRP transmission and reception point
  • the terminal device communicates with the RAN device through the transmission resources (for example, frequency domain resources, time domain resources, code domain resources, etc.) used by one or more cells managed by the RAN device, and the cell may belong to a macro cell (macro cell).
  • cell, hypercell, or small cell where the small cell may include: metro cell, micro cell, pico cell, femto cell Femto cells, etc.
  • These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.
  • the terminal equipment in Figure 1 can also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile equipment, user terminal, terminal, wireless Communication equipment, user agent or user device.
  • UE user equipment
  • the terminal device can be a station (ST) in a WLAN, a cellular phone, a cordless phone, a SIP phone, a wireless local loop (WLL) station, a personal digital assistant (PDA) device, Handheld devices with wireless communication functions, relay devices, computing devices or other processing devices coupled to wireless modems, in-vehicle devices, wearable devices, and next-generation communication systems, such as terminal devices in 5G networks or future evolution of public land Terminal equipment in the mobile network (public land mobile network, PLMN) network, etc.
  • the terminal device may also be a wearable device. Wearable devices can also be called wearable smart devices.
  • wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories.
  • Wearable devices are not only a hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the air interface user plane protocol stack of a RAN device includes at least a packet data convergence protocol (PDCP) layer, a radio link control (RLC) layer, and a media access control (media access control) layer. , MAC) layer and physical (PHY) layer; in the NR system, the air interface user plane protocol stack of the RAN device also includes a service data adaptation protocol (SDAP) layer, where the SDAP layer is the upper layer of the PDCP layer.
  • SDAP service data adaptation protocol
  • the air interface control plane protocol stack of a RAN device includes a radio resource control (radio resource control, RRC) layer, a PDCP layer, an RLC layer, a MAC layer, and a PHY layer. It can be seen that the PDCP layer, RLC layer, MAC layer, and PHY layer have both control plane functions and user plane functions.
  • a terminal device also has an air interface user plane and control plane protocol stack corresponding to the RAN device.
  • a RAN device such as gNB
  • a RAN device can be further divided into a centralized unit (CU) and a distributed unit (DU) according to the protocol stack, where CU and DU can be separately Deploy on different physical devices.
  • the CU is responsible for the operations of the RRC layer, the SDAP layer and the PDCP layer
  • the DU is responsible for the operations of the RLC layer, the MAC layer and the PHY layer.
  • Figure 2(a) shows an architecture of gNB divided into CU and DU.
  • one gNB may include one CU and one or more DUs, and the one or more DUs are controlled by the one CU.
  • a DU and CU are connected through a control plane interface (such as F1-C) for transmitting control plane data; a DU and CU are connected through a user plane interface (such as F1-U) for transmitting user plane data.
  • the CU can also be divided into a centralized unit of the control plane (that is, a centralized unit control plane CU-CP network element) and a centralized unit of the user plane (that is, a centralized unit user plane CU-UP network element), where CU-CP and CU -UP can also be deployed on different physical devices.
  • CU-CP is responsible for the processing of the RRC layer and the control plane of the PDCP layer
  • CU-UP is responsible for the processing of the user plane of the SDAP layer and the PDCP layer.
  • Figure 2(b) shows an architecture of gNB divided into CU-CP, CU-UP and DU.
  • one gNB may include one CU-CP, one or more CU-UPs, and one or more DUs.
  • a CP-UP is only connected to one CU-CP through a control plane interface (such as E1) for transmission of control plane data; a DU is only connected to one CU-CP through a control plane interface (such as F1-C) for transmission Control plane data; under the control of CU-CP, a DU can be connected to one or more CU-UPs, and a CU-UP can also be connected to one or more DUs.
  • CU-UP and DU are connected through a user plane interface (Such as F1-U) connection, used to transmit user plane data. It is worth noting that, in order to maintain the flexibility of the network, one DU or one CU-UP can also be connected to multiple CU-CPs.
  • the protocol stack division method according to which the above-mentioned RAN device is divided into CU and DU is only exemplary, and the RAN device may also divide CU and DU according to other division methods.
  • the CU may be responsible for the operations of the RRC layer, SDAP layer, PDCP layer, and RLC layer, and the DU may be responsible for the MAC layer and PHY layer operations; or the CU may be responsible for the RRC layer and SDAP layer operations, and the DU may be responsible for the PDCP layer and RLC layer. , MAC layer and PHY layer operations, etc.; similarly, the protocol stack division method between CU-CP and CU-UP in the CU is also variable; the application does not specifically limit this.
  • Packet duplication is the transmission of the same data packet between the RAN device and the terminal device through two wireless links.
  • the data transmission between RAN equipment and terminal equipment is based on radio bearer (data radio bearer, DRB), that is, data with similar quality of service (QoS) requirements will be carried and transmitted on a DRB.
  • DRB data radio bearer
  • QoS quality of service
  • both the RAN device and the terminal device respectively configure the corresponding PDCP entity, RLC entity, and MAC entity for the DRB.
  • the PDCP entity that processes the DRB carried by the downlink data packet will allocate a PDCP sequence number for the downlink data packet, and include the PDCP sequence number in the PDCP protocol data unit (protocol data unit). data unit, PDU) header and sent to the RLC entity for processing.
  • the PDCP entity corresponding to the DRB should be configured with two RLC entities, corresponding to two logical channels (LC).
  • the PDCP entity will send two downlink data packets with the same PDCP sequence number to Two RLC entities, where the two RLC entities may be on one physical device or on different physical devices.
  • the common MAC entity or respective MAC entities corresponding to the two RLC entities schedule the downlink data packets with the same PDCP sequence number to multiple wireless links for transmission to the terminal device.
  • its PDCP entity performs repetitive detection. It should be understood that for data packet repetition of one DRB, the terminal device also has two RLC entities and one PDCP entity for the DRB. In one case, the terminal device correctly receives the PDCP PDU on one of the logical channels, and the PDCP entity performs subsequent processing such as data packet analysis on the received PDCP PDU; in another case, the terminal device performs subsequent processing such as packet analysis on the two logical channels.
  • the PDCP entity checks whether the two PDCP PDUs received are the same in their PDCP sequence numbers. If a PDCP PDU with the same PDCP sequence number is received, one of the PDCP PDUs is reserved, and the PDCP entity pairs The reserved PDCP PDU is subjected to subsequent processing such as data packet analysis.
  • Carrier aggregation is that a RAN device communicates with a terminal device through multiple carriers. That is, the downlink data between the RAN device and the terminal device can be transmitted on multiple wireless links through multiple carriers. Increase the data transmission rate. Among them, one carrier may correspond to a cell. When a RAN device communicates with a terminal device through multiple carriers, the RAN device corresponds to a group of cells, and the RAN device may be called a cell group (CG).
  • the multiple carriers used for communication between the RAN device and the terminal device and the bandwidth of each carrier are determined by the network configuration or the RAN device and the terminal device through negotiation.
  • the RAN device configures a PDCP entity, an RLC entity, and a MAC entity for the DRB, and an RLC entity corresponds to a logical channel.
  • the MAC entity schedules each downlink data packet in the downlink data of the logical channel to different carriers and sends it to the terminal device. That is, the MAC entity schedules the downlink data of one logical channel to multiple carriers and sends it through multiple wireless links.
  • Figure 3(a) shows a schematic diagram of the protocol stack of the user plane layer 2 (L2) of the RAN device.
  • the RRC entity of the RAN device configures one PDCP entity, two RLC entities, and one MAC entity for one DRB.
  • the PDCP entity corresponding to the DRB sends PDCP PDUs with the same PDCP sequence number to two RLC entities, and transmits them to the MAC entity through two logical channels, and the MAC entity then transmits the downlink data packets of the two logical channels with the same PDCP sequence number. Scheduled to multiple carriers and sent to terminal equipment.
  • Dual connectivity means that a terminal device simultaneously wirelessly communicates with two RAN devices (such as the RAN device 140 and the RAN device 142 in FIG. 1).
  • the two RAN devices may use the same radio access technology (RAT), for example, both use NR; they may also use different RATs, for example, one uses LTE technology and the other uses NR technology.
  • RAT radio access technology
  • Each RAN device manages its own cell group, and each cell group has at least one cell.
  • Figure 3(b) shows a schematic diagram of a user plane L2 protocol stack of a RAN device under dual connectivity.
  • the RAN device corresponding to CG1 has a PDCP entity corresponding to the DRB, which is also called a host PDCP entity, and the RAN device corresponding to CG2 does not have a PDCP entity.
  • a RAN device hosting a PDCP entity is called a hosting PDCP entity node, and a RAN device without a PDCP entity is called a corresponding node.
  • the user plane L2 of the RAN device corresponding to CG1 also includes the RLC layer and the MAC layer; the user plane L2 of the RAN device corresponding to CG2 includes the RLC layer and the MAC layer, but does not include the PDCP layer.
  • the node hosting the PDCP entity configures an RLC entity and a MAC entity for itself and the corresponding node respectively.
  • the escrow PDCP entity node sends part of the downlink data of the DRB to the terminal device; in addition, the escrow PDCP entity node sends another part of the DRB downlink data through the tunnel between the escrow PDCP entity node and the corresponding node (tunnel) Sent to the corresponding node, and the corresponding node sends the other part of the downlink data to the terminal device.
  • the managed PDCP entity node decides how to allocate downlink data for the DRB to the managed PDCP entity node and the corresponding node for transmission.
  • the node hosting the PDCP entity can map part of the PDCP PDU of the DRB to its own logical channel, and map another part of the PDCP PDU of the DRB to the logical channel of the corresponding node.
  • the host PDCP entity node and the respective MAC entities of the corresponding node can respectively map their respective logical channels.
  • the downlink data of the channel is scheduled for transmission on the wireless link between the respective node and the terminal equipment.
  • a tunnel is established between the managed PDCP entity node and the corresponding node so that the DRB data can be transmitted between the two nodes.
  • the node hosting the PDCP entity sends the uplink tunnel information (that is, the receiving endpoint information of the hosting PDCP entity as the receiving endpoint of the tunnel) to the corresponding node; the corresponding node sends the downlink tunnel information (that is, the corresponding node is the receiving endpoint of the tunnel). Receive endpoint information) and send it to the node hosting the PDCP entity.
  • the hosted PDCP entity node For downlink data transmission, the hosted PDCP entity node sends downlink data to the corresponding node according to the downlink tunnel information provided by the corresponding node; for uplink data transmission, the corresponding node sends uplink data to the hosted PDCP entity node according to the uplink tunnel information provided by the hosted PDCP entity node.
  • the uplink tunnel information can be the uplink tunnel transport layer address of the tunnel and the tunnel endpoint identifier (TEID), the index of the tunnel, or the identifier or identity of the tunnel (identifier or identity, ID), etc.; accordingly, the downlink tunnel information It can be the downlink tunnel transport layer address and TEID of the tunnel, the index of the tunnel, or the identifier of the tunnel, etc.
  • the PDCP entity hosting the PDCP entity node maps the data packets with the same PDCP sequence number to the logical channel hosting the PDCP entity node and the corresponding node, and the MAC entity of the respective node will download the data packet.
  • the data packets are respectively dispatched to their respective wireless links and transmitted to the terminal equipment.
  • the corresponding node needs to provide auxiliary information to the managed PDCP entity node, so that the managed PDCP entity node can decide how to perform data packet repetition.
  • the auxiliary information may be a suggestion on whether the corresponding node activates data packet repetition or wireless quality information of the corresponding node.
  • the embodiments of the present application provide an improved technical solution for auxiliary information and its transmission. Further, the technical solution of the embodiment of the present application is also applied to a RAN device architecture with CU and DU, where the CU may also include the case where the CU-CP and CU-UP are separated.
  • FIG. 5, FIG. 7 and FIG. 8 are schematic flowcharts of the communication method of the embodiment of the present application, showing the detailed communication steps or operations of the method, but these steps or operations are only examples.
  • the example can also perform other operations or variations of the various operations in FIG. 5, FIG. 7, and FIG. 8.
  • the steps in Figure 5, Figure 7 and Figure 8 can be performed in a different order from that shown in Figure 5, Figure 7 and Figure 8, and it may not be necessary to perform the steps in Figure 5, Figure 7 and Figure 8. All operations.
  • FIG. 4 shows a schematic diagram of a user plane L2 protocol stack for data packet repetition when each RAN device has a carrier aggregation function in a dual connectivity scenario according to an embodiment of the present application, where M is greater than or equal to 1 An integer, N is an integer greater than or equal to 2.
  • the RAN device corresponding to CG1 has a PDCP entity, which is a managed PDCP entity node, and the RAN device corresponding to CG2 is a corresponding node. It is worth noting that, unlike Figure 3(b), for one DRB, multiple RLC entities are configured in the corresponding node.
  • multiple tunnels are established between the managed PDCP entity node and the corresponding node, among which there is a one-to-one correspondence between the RLC entity and the tunnel, that is, the number of tunnels between the managed PDCP entity node and the corresponding node and the number of the corresponding node
  • the number of RLC entities is the same.
  • the managed PDCP entity node configures multiple RLC entities of the corresponding node through the control plane signaling of the Xn-C interface; the managed PDCP entity node sends multiple uplink tunnel information to the corresponding node, and the corresponding node will The information of the corresponding multiple downlink tunnels is sent to the managed PDCP entity node; wherein, the number of RLC entities or tunnels of the corresponding node is determined by the managed PDCP entity node.
  • the managed PDCP entity node corresponding to the DRB notifies the corresponding node of the maximum number of RLC entities or tunnels that it allows to establish through the control plane signaling of the Xn-C interface, and the corresponding node accordingly Determine the number of RLC entities or tunnels by itself, and send the corresponding downlink tunnel information to the node hosting the PDCP entity.
  • This article does not specifically limit the number of RLC entities or tunnels of the corresponding node.
  • the configuration of the RLC entity or tunnel of the corresponding node by the hosting PDCP entity node is carried on a secondary node addition required (SN addition required) message or a secondary node modification required (SN modification required) message.
  • FIG. 5 shows a schematic flow chart of a method for auxiliary information and its transmission in a dual connection scenario provided by an embodiment of the present application.
  • the method 500 can be applied to the information exchange between the MN 140 and the SN 142 shown in FIG. 1.
  • SN is the corresponding node
  • MN is the corresponding node.
  • the process described in Figure 5 includes the following steps:
  • the corresponding node determines that the data packet repeats auxiliary information.
  • the data packet repetition auxiliary information includes information of at least one logical channel of the corresponding node, and the data packet repetition auxiliary information is used to assist the hosting PDCP entity node to make a data packet repetition decision.
  • the information of the at least one logical channel may be at least one logical channel that the activation data packet suggested by the corresponding node is repeated, it may also be the wireless quality assistance information of at least one logical channel of the corresponding node, or the activation data packet suggested by the corresponding node
  • the repeated at least one logical channel and the wireless quality auxiliary information corresponding to the at least one logical channel may also be at least one logical channel suggested by the corresponding node that the active data packet is repeated and other information related to the wireless quality auxiliary information corresponding to the at least one logical channel random combination.
  • three RLC entities RLC1, RLC2, and RLC3 are configured in the corresponding node, that is, there are three tunnels between the managed PDCP entity node and the corresponding node , Corresponding to LC1, LC2 and LC3 are the first tunnel, the second tunnel and the third tunnel respectively.
  • the logical channel where the activation data packet is repeated may be any one of LC1 to LC3, or any two of LC1 to LC3, or LC1 to LC3.
  • the data packet repetition auxiliary information may include the logical channel identifier or the logical channel index of the logical channel that the corresponding node recommends to activate the data packet repetition. It is worth noting that since one logical channel corresponds to one tunnel, the data packet repetition auxiliary information may include information about at least one downlink tunnel that the corresponding node recommends to activate the data packet repetition. Specifically, the data packet repetition auxiliary information may include at least one tunnel identifier, or at least one tunnel index, or the transport layer address and TEID of at least one downlink tunnel that the corresponding node recommends to activate the data packet repetition.
  • the data packet duplication auxiliary information may include the first tunnel identifier and the third tunnel identifier, or the first tunnel index and the third tunnel index, or the first downlink tunnel
  • the transport layer address and TEID of and the transport layer address and TEID of the third downstream tunnel may be determined through negotiation between the hosting PDCP entity node and the corresponding node, or may be defined by the 3GPP standard, or may be configured by the network management system, which is not specifically limited in this document.
  • the data packet repetition assistance information may include the wireless quality assistance information of some or all of the logical channels in LC1 to LC3 of the corresponding node.
  • the radio quality auxiliary information of one of the logical channels can be downlink radio quality index (DL radio quality index), uplink radio quality index (UL radio quality index), average CQI, average HARQ failure, average HARQ retransmission, and power headroom report ( At least one of power headroom report, PHR).
  • the data packet repetition assistance information may include logical channels (such as LC1 and LC2) for which the corresponding node recommends to activate the data packet repetition, and the respective wireless quality assistance information of these logical channels (LC1 and LC2). It should be understood that if the downlink tunnel information is used to represent the data packet repeated auxiliary information, the wireless quality auxiliary information of a logical channel is the wireless quality auxiliary information of the logical channel corresponding to a tunnel.
  • the corresponding node sends the data packet repeated auxiliary information to the node hosting the PDCP entity.
  • the host PDCP entity node receives the data packet repeated auxiliary information sent by the corresponding node.
  • the corresponding node uses the auxiliary information forwarding process to provide the data packet repeated auxiliary information to the node hosting the PDCP entity.
  • the auxiliary information forwarding process is used by the corresponding node to provide auxiliary information to the managed PDCP entity node for the managed PDCP entity node to use for user plane management and optimization.
  • the corresponding node sends the data packet repeat auxiliary information to the node hosting the PDCP entity through the NR user plane protocol frame.
  • the NR user plane protocol frame format specified in the current 3GPP standard can be found in the 3GPP TS38.425 v15.4.0 technical specification. Table 1 shows the NR user plane protocol frame format of the auxiliary information data in this technical specification.
  • the corresponding node has a logical channel, which can provide auxiliary information such as whether to activate the logical channel of the corresponding node or the wireless quality auxiliary information of the logical channel to the host PDCP entity node.
  • Table 1 NR user plane protocol frame format of auxiliary information data in 3GPP3GPP TS38.425 v15.4.0
  • the value of the "PDU Type” field is 2, indicating that the NR user plane protocol data is used to represent auxiliary information data.
  • the "PDCP Duplication Indication” field is used to identify whether the "PDCP Duplication Activation Suggestion (PDCP Duplication Activation Suggestion)" field exists. For example, the value of the "PDCP Repeat Indication” field is 0, which means that there is no “PDCP Repeated Activation Suggestion” field; the value of the "PDCP Repeat Indication” field is 1, which means that there is a "PDCP Repeated Activation Suggestion” field.
  • the “Assistance Information Indication (Assistance Information Indication)” field is used to identify whether the "Number of Assistance Information Field (Number of Assistance Information Field)" field exists. For example, the value of the "Auxiliary Information Indication” field is 0, which means that there is no “Auxiliary Information Field Number” field; the “Auxiliary Information Indication” field has a value of 1, which means that the "Auxiliary Information Field Number” field is present.
  • the “spare” field usually has a value of 0, which is reserved for use by subsequent versions.
  • the "PDCP reactivation suggestion” field is used to identify whether the corresponding node activates PDCP repetition.
  • the value of the "PDCP reactivation suggestion” field is 0, which means that PDCP repetition is not activated; the value of the "PDCP reactivation suggestion” field is 1, which means that the PDCP repetition is activated.
  • the "Number of Auxiliary Information Fields” field is used to indicate the number of the "Assistance Information Type” field and the concatenated “Radio Quality Assistance Information (Radio Quality Assistance Information)” field; the "Assistance Information Type” field is used to describe The type of wireless quality assistance information provided by the corresponding node to the NR PDCP entity node.
  • the downlink radio quality index (DL Radio Quality Index) is a numeric index used to indicate the downlink DRB radio quality, where the value 0 represents the lowest quality
  • the uplink radio quality index (UL Radio Quality Index) is a numeric index used to indicate the uplink DRB radio quality
  • the numerical index of quality where the value 0 represents the lowest quality
  • the average window of average CQI, average HARQ failure, and average HARQ retransmission is set by configuration
  • power headroom report is the report PHR MAC CE defined by the 3GPP standard specification .
  • the "Number of Radio Quality Auxiliary Information Fields" field is used to indicate the number of bytes required for the radio quality auxiliary information field.
  • auxiliary information data in Table 1 refers to the data packet duplication of the auxiliary information in the embodiment of the present application
  • PDCP duplication in Table 1 refers to the data packet duplication in the embodiment of the present application.
  • the corresponding node has multiple logical channels. Therefore, in the auxiliary information data, the corresponding node can not only indicate whether to activate PDCP repetition, but also indicate which logical channel or logical channels to activate. As in the above example, the corresponding node may indicate whether to activate data packet repetition in any combination of LC1, LC2, and LC3. For this reason, the 1-bit length of the "PDCP repeated activation suggestion" field in Table 1 is no longer adapted. In the embodiment of the present application, the length of the "PDCP repeated activation suggestion" field can be set according to the number of logical channels of the corresponding node. Similarly, in the "wireless quality assistance information" field, the corresponding node may also indicate the wireless quality assistance information of different logical channels.
  • the wireless quality auxiliary information for one type of auxiliary information in Table 1 may be the wireless quality auxiliary information of one or more logical channels under the auxiliary information type.
  • the corresponding node may indicate the wireless quality auxiliary information of each of LC1, LC2, and LC3 whose auxiliary information type is "downlink wireless quality index".
  • Table 2 shows the NR user plane protocol frame format of the auxiliary information data in the embodiment of the present application.
  • the length of the "PDCP repeated activation suggestion" field can be set to 2. Bit (as shown in Table 2), for example, when the value of this field is 00, it indicates that it is recommended to activate LC1 for PDCP repetition; when the value of this field is 01, it indicates that it is recommended to activate LC2 for PDCP repetition; when the value of this field is 10
  • the instruction suggests that LC3 is activated for PDCP repetition.
  • the length of the "PDCP reactivation suggestion" field can be set to 3 bits.
  • this field when the value of this field is 001, it indicates that it is recommended to activate LC1 for PDCP repetition; when the value of this field is 010 When the value of this field is 100, it indicates that it is recommended to activate LC2 for PDCP repetition; when the value of this field is 011, it indicates that it is recommended to activate LC1 and LC2 for PDCP repetition; when the value of this field is When it is 110, it indicates that it is recommended to activate LC2 and LC3 for PDCP repetition; when the value of this field is 101, it indicates that it is recommended to activate LC1 and LC3 for PDCP repetition; when the value of this field is 111, it indicates that it is recommended to activate LC1 to LC3 for PDCP repetition. repeat.
  • the value of this field is 001, it indicates that it is recommended to activate the first tunnel for PDCP repetition; when the value of this field is 010, it indicates that it is recommended to activate the second tunnel for PDCP repetition; when the value of this field is 100, it indicates that it is recommended Activate the third tunnel for PDCP repetition; when the value of this field is 011, it indicates that it is recommended to activate the first tunnel and the second tunnel for PDCP repetition; when the value of this field is 110, it indicates that it is recommended to activate the second and third tunnel Perform PDCP repetition; when the value of this field is 101, it indicates that it is recommended to activate the first tunnel and the third tunnel for PDCP repetition; when the value of this field is 111, it indicates that it is recommended to activate the first tunnel to the third tunnel for PDCP repetition.
  • the "wireless quality auxiliary information" field may contain the wireless quality auxiliary information of LC1 or LC2
  • the "PDCP repeated activation suggestion" field has a value of 010, indicating Activate LC2 for PDCP repetition
  • the "Wireless Quality Assistance Information” field contains LC2's wireless quality assistance information; or, it means that the second tunnel is activated for PDCP repetition
  • the "Wireless Quality Assistance Information” field contains the logical channel corresponding to the second tunnel Wireless quality auxiliary information.
  • the "PDCP repeated activation suggestion" field has a value of 110, indicating that LC2 and LC3 are activated for PDCP repetition, and the "wireless quality assistance information” field contains the wireless quality assistance information of LC2 and LC3; or, it indicates that the second tunnel is activated.
  • the "radio quality assistance information” field contains the radio quality assistance information of the logical channels corresponding to the second tunnel and the third tunnel respectively.
  • the wireless quality auxiliary information of a logical channel may be the wireless quality auxiliary information obtained after mathematical operations (such as taking arithmetic average or weighted average) of the wireless quality auxiliary information of each carrier corresponding to the logical channel group
  • the wireless quality auxiliary information of a logical channel may also be the wireless quality auxiliary information of each carrier corresponding to the logical channel without processing.
  • the correspondence between the various values of the "PDCP repeated activation suggestion" field and the logical channel or tunnel is carried on the secondary node addition requirement (SN addition required) message or secondary node modification requirement (SN modification required) message .
  • the corresponding node sends the data packet repeated auxiliary information to the node hosting the PDCP entity through the auxiliary information data of the Xn-U interface.
  • the corresponding node also obtains its logical channel group.
  • Logical channel grouping is to divide the logical channels of corresponding nodes into multiple groups, and a logical channel group (LCG) contains one or more logical channels.
  • LCG logical channel group
  • one logical channel corresponds to one RLC entity
  • one logical channel group corresponds to one or more RLC entities, that is, a group of RLC entities.
  • the managed PDCP entity node groups the logical channels of the corresponding nodes, and informs the corresponding nodes of the grouping; the corresponding nodes can save the logical channel grouping information and use it later.
  • the corresponding node groups its own logical channels and notifies the escrow PDCP entity node of the grouping; the escrow PDCP entity node obtains the logical channel grouping information and can save and use it later.
  • group logical channels There are many ways to group logical channels.
  • one LCG is any combination of the respective LCs of the corresponding node.
  • the corresponding nodes have LC1, LC2, and LC3, and the logical channels can be divided into four groups. Specifically, LCG1 includes LC1 and LC2, LCG2 includes LC2 and LC3, LCG3 includes LC1 and LC3, and LCG4 includes LC1 to LC3.
  • an LCG may be any combination of a specific LC of the corresponding node and other LCs.
  • any LCG will always include the specific LC of the corresponding node, and the specific LC may also be referred to as a primary (primary) LC.
  • LC1 when LC1 is the main LC, its logical channels can be divided into three groups. Specifically, LCG1 includes LC1 and LC2, LCG2 includes LC1 and LC3, and LCG3 includes LC1 to LC3. It is worth noting that the main LC may be determined by the host PDCP entity node or the corresponding node, and the main LC may include multiple LCs.
  • LCG1 includes LC1 and LC2
  • LCG2 includes LC1 to LC3.
  • Tables 3 and 4 show the logical channel grouping information sent to the corresponding node after the host PDCP entity node determines the logical channel grouping of the corresponding node, or the logical channel sent to the host PDCP entity node after the corresponding node determines the logical channel grouping of the corresponding node Illustration of grouping information.
  • the logical channel grouping information is carried on a secondary node addition requirement (SN addition required) message or a secondary node modification requirement (SN modification required) message.
  • DRB ID represents the identification of the DRB served by the corresponding node.
  • LCID grouping list represents a list of logical channel group identifiers, which includes multiple logical channel group identifiers (LCG IDs).
  • LCG1 ID identifies LCG1 composed of LC1 and LC2
  • LCG2 ID identifies LCG2 composed of LC2 and LC3
  • LCG3 ID identifies LCG3 composed of LC1 and LC3.
  • Table 4 shows a schematic diagram of dividing the logical channel of the corresponding node into three logical channel groups.
  • LCG1 ID identifies LCG1 composed of LC1 and LC2
  • LCG2 ID identifies LCG2 composed of LC1 and LC3
  • LCG3 ID identifies LCG3 composed of LC1 and LC2.
  • the data packet repetition auxiliary information generated by the corresponding node is granular with the logical channel group.
  • the data packet repetition auxiliary information may be at least one logical channel group suggested by the corresponding node to activate the data packet repetition, or it may be the respective wireless quality auxiliary information of part or all of the logical channel groups of the corresponding node, or the corresponding node At least one logical channel group that the proposed activation data packet repeats and the wireless quality auxiliary information corresponding to the at least one logical channel group.
  • the wireless quality auxiliary information of a logical channel group may be the wireless quality auxiliary information obtained after the wireless quality auxiliary information of each logical channel in the logical channel group undergoes mathematical operations (such as taking arithmetic average or weighted average); a logical channel group
  • the wireless quality auxiliary information of may also be unprocessed wireless quality auxiliary information of each logical channel in the logical channel group.
  • the data packet repeated auxiliary information sent by the corresponding node is also granular with the logical channel group.
  • a tunnel group can contain one or more tunnels.
  • the tunnel grouping information can be carried on the secondary node addition required (SN addition required) message or the secondary node modification required (SN modification required) message.
  • SN addition required the secondary node addition required
  • SN modification required the secondary node modification required
  • a tunnel group is any combination of tunnels.
  • a tunnel group can be any combination of a specific tunnel and other tunnels.
  • the above Table 3 and Table 4 correspond to tunnel grouping information, where the LCID grouping list corresponds to Tunnel ID grouping list, which represents a tunnel group identification list; and corresponds to any tunnel group identification in the list, Contains the downlink tunnel information of each tunnel included in the tunnel group, such as the tunnel identifier of each tunnel, or the tunnel index of each tunnel, or the transport layer address and TEID of each downlink tunnel.
  • a logical channel group contains one or more logical channels
  • the data packet repeating auxiliary information with the granularity of the logical channel group or tunnel group can effectively reduce the data amount of auxiliary information and reduce the information overhead.
  • the decision data packet of the managed PDCP entity node is repeated.
  • the managed PDCP entity node receives the data packet repetition auxiliary information sent by the corresponding node, and can determine the data packet duplication according to the situation of the managed PDCP entity node (such as the wireless quality of each logical channel of the managed PDCP entity node, the load of the managed PDCP entity node, etc.) . Specifically, the managed PDCP entity node decides to activate at least two logical channels for data packet repetition.
  • the at least two logical channels may be composed of logical channels hosting the PDCP entity node, or composed of logical channels of the corresponding node, or composed of the logical channels hosting the PDCP entity node and the corresponding node.
  • the managed PDCP entity node activates its own at least one logical channel and at least one logical channel of the corresponding node to perform data packet repetition according to the data packet repetition suggestions of the corresponding node and its own situation;
  • the wireless quality auxiliary information of a logical channel decides to activate multiple logical channels of the corresponding node for data packet repetition; or the managed PDCP entity node decides to activate only its own multiple logical channels for data packet repetition according to the data packet repetition auxiliary information of the corresponding node.
  • the data packet repetition auxiliary information contains tunnel information
  • the managed PDCP entity node decides whether to activate the tunnel with the corresponding node, or activate several tunnels with the corresponding node for data packet repetition.
  • the corresponding node can send the data packet repetition auxiliary information to the escrow PDCP entity node at the granularity of the logical channel, so that the auxiliary escrow PDCP entity node can effectively make the data packet repetition decision.
  • the managed PDCP entity node may decide to activate multiple logical channels of the corresponding node to perform data packet repetition according to the data packet repetition auxiliary information.
  • this embodiment of the present application further includes step 504.
  • the managed PDCP entity node sends a downlink data packet to the corresponding node through at least one tunnel.
  • the hosting PDCP entity node when the hosting PDCP entity node decides to activate at least one logical channel of the corresponding node for data packet repetition, the hosting PDCP entity node sends a downlink data packet to the corresponding node through at least one tunnel corresponding to the at least one logical channel , So that the corresponding node can schedule the corresponding downlink data packet on the at least one logical channel to at least one wireless link and send it to the terminal device.
  • the DRB when a managed PDCP entity node configures a DRB, the DRB is configured to host the PDCP entity node's LH1 and LH2 and the corresponding node's LH3 and LH4, and the managed PDCP entity node and the corresponding node are configured to correspond to Two tunnels of LH3 and LH4, such as the first tunnel and the second tunnel, where the first tunnel corresponds to LH3 and the second tunnel corresponds to LH4.
  • step 503 the hosting PDCP entity node decides to activate its own LH1 and the corresponding node's LH3 for data packet repetition, then in this step, the hosting PDCP entity node sends the downlink data packet to the corresponding node through the first tunnel.
  • the managed PDCP entity node also sends the downlink data packet to its own RLC1.
  • step 503 the host PDCP entity node decides to activate LH3 and LH4 of the corresponding node for data packet repetition, then in this step, the host PDCP entity node will pass the downlink data packets with the same PDCP sequence number through the first tunnel and the second tunnel respectively Sent to the corresponding node.
  • step 503 the hosting PDCP entity node decides to activate at least one tunnel with the corresponding node for data packet repetition, then in this step, the hosting PDCP entity node sends the downlink data packet to the corresponding node through the at least one tunnel. node.
  • the managed PDCP entity node sends the downlink data packet to the corresponding node through the corresponding tunnel according to the decision of the data packet repetition, and the corresponding RLC entity in the corresponding node correctly receives the downlink data packet, so that the corresponding node can correctly perform the data packet repetition .
  • the wireless communication system shown in FIG. 1 may also include a terminal device for wireless connection with three or more RAN devices, which may also be referred to as multiple connections.
  • a terminal device for wireless connection with three or more RAN devices, which may also be referred to as multiple connections.
  • one of the RAN devices is an MN, and the other multiple RAN devices are SNs.
  • MN realizes the transmission of control plane data and user plane data with 5GC equipment through NG-C and NG-U interfaces
  • SN realizes the transmission of user plane data with 5GC equipment through NG-U interface
  • MN and SN can be separated
  • the transmission of control plane data and user plane data is realized through Xn-C and Xn-U interfaces.
  • one RAN device is a managed PDCP entity node, and multiple other RAN devices are corresponding nodes.
  • multiple RLC entities are configured in some or all corresponding nodes.
  • the method flow shown in FIG. 5 is applicable to the interaction between each corresponding node configured with multiple RLC entities and the node hosting the PDCP entity.
  • the managed PDCP entity node obtains the data packet repetition auxiliary information of multiple corresponding nodes, which can further optimize the data packet repetition decision-making, if there is more freedom to activate the appropriate logical link for data packet repetition, etc.
  • FIG. 6 shows a schematic diagram of a user plane L2 protocol stack used for data packet repetition in a RAN device architecture divided into CU and DU according to an embodiment of the present application.
  • Figure 6(a) shows the case where the RAN equipment consists of one CU and one DU, where L is an integer greater than 2;
  • Figure 6(b) shows the case where the RAN equipment consists of one CU and two DUs , Where P is an integer greater than or equal to 2, and Q is an integer greater than or equal to 2.
  • P is an integer greater than or equal to 2
  • Q is an integer greater than or equal to 2.
  • the CU configures multiple RLC entities of the DU through the control plane signaling of the F1-C interface; the CU sends the information of multiple uplink tunnels to the DU, and the DU sends the information of the corresponding multiple downlink tunnels to CU; where the number of RLC entities or tunnels of the DU is determined by the CU.
  • the CU informs the DU of the maximum number of RLC entities or tunnels that it allows to establish through the control plane signaling of the F1-C interface, and the DU determines the number of RLC entities or tunnels by itself, and The corresponding downlink tunnel information is sent to the CU.
  • This article does not specifically limit the number of RLC entities of the DU.
  • the configuration of the RLC entity or tunnel of the CU to the DU is carried on a terminal device context setup request (UE context setup request) message or a terminal device context modification request (UE context modification request) message.
  • FIG. 7 shows a schematic flowchart of an improved auxiliary information and a method for transferring it under a RAN device architecture divided into CU and DU according to an embodiment of the present application.
  • the method 700 can be applied to the scenario of FIG. 6(a) or FIG. 6(b).
  • the CU in FIG. 7 is similar to the managed PDCP entity node in FIG. 5, and the DU in FIG. 7 is similar to the corresponding node in FIG. 5.
  • the process described in Figure 7 includes the following steps:
  • the DU determines that the data packet repeats auxiliary information.
  • the DU determines that the data packet repeats the auxiliary information, and the DU may be any DU in FIG. 6(a) or FIG. 6(b).
  • the data packet repetition auxiliary information determined by the DU is similar to the data packet repetition auxiliary information determined by the corresponding node in step 501 of the foregoing embodiment, and will not be repeated here.
  • the DU sends the data packet repeat auxiliary information to the CU.
  • the CU receives the repeated auxiliary information of the data packet sent by the DU.
  • This step is similar to step 502 in the foregoing embodiment, and will not be repeated here.
  • the DU sends the data packet repeated auxiliary information to the CU through the auxiliary information data of the F1-U interface.
  • the DU before step 701, the DU also obtains its logical channel group or tunnel group.
  • the CU groups the logical channels of the DU or the tunnel between the CU and the DU, and notifies the DU of the grouping; the DU can save the grouping information and use it later.
  • the DU groups its own logical channels or the tunnels between it and the CU, and notifies the CU of the grouping; the CU can save the grouping information and use it later.
  • the logical channel grouping information or tunnel grouping information may be carried on a terminal device context setup request (UE context setup request) message or a terminal device context modification request (UE context modification request) message.
  • UE context setup request terminal device context setup request
  • UE context modification request terminal device context modification request
  • the data packet repetition auxiliary information generated by the DU is granular with the logical channel group or tunnel group; in step 702 In the data packet repetition auxiliary information sent by the DU, the granularity is also based on the logical channel group or tunnel group.
  • the CU decision data packet is repeated.
  • the CU decides that the data packet is repeated according to the received data packet repetition sent by the DU.
  • the CU activates at least two logical channels suggested by the DU to perform data packet repetition according to the DU's packet repetition suggestion decision; or the CU makes a decision based on the radio quality assistance information of multiple logical channels of the DU Activate at least two logical channels of the DU to repeat data packets and so on.
  • the CU activates some or all of the logical channels in the two DUs to perform data packet repetition according to any one DU or two DU data packet repetition suggestions;
  • the radio quality assistance information of multiple logical channels of one DU or two DUs decides to activate some or all of the logical channels in the two DUs for data packet repetition.
  • the DU can send the data packet repetition auxiliary information to the CU at the granularity of a logical channel, so that the CU can effectively make the decision of data packet repetition.
  • the CU may decide to activate multiple logical channels of at least one DU for data packet repetition according to the data packet repetition auxiliary information.
  • this embodiment of the present application further includes step 704.
  • the CU sends a downlink data packet to the DU through at least one tunnel.
  • the CU when the CU decides to activate at least one logical channel of a DU for data packet repetition, the CU sends a downlink data packet to the DU through at least one tunnel corresponding to the at least one logical channel, so that the DU The corresponding downlink data packet on the at least one logical channel can be scheduled to at least one wireless link and sent to the terminal device.
  • the CU when the CU configures the DRB, it configures the DRB in the DU's LH1, LH2, and LH3, and configures the three tunnels between the CU and the DU corresponding to LH1 to LH3 , Such as the first tunnel, the second tunnel and the third tunnel, where the first tunnel corresponds to LH1, the second tunnel corresponds to LH2, and the third tunnel corresponds to LH3.
  • the CU decides to activate LH1 and LH3 of the DU for data packet repetition, then in this step, the CU sends downlink data packets with the same PDCP sequence number to the DU through the first tunnel and the third tunnel.
  • the DRB is configured in LH1 and LH2 of DU1 and LH3 and LH4 of DU2, and the CU and the two DUs are configured to correspond to LH1 to LH4
  • the four tunnels such as the first tunnel, the second tunnel, the third tunnel, and the fourth tunnel, where the first tunnel corresponds to LH1, the second tunnel corresponds to LH2, and so on.
  • step 703 the CU decides to activate LH1 of DU1 and LH3 and LH4 of DU2 for data packet repetition, then in this step, the CU sends the downlink data packets with the same PDCP sequence number to DU1 and DU1 through the first tunnel respectively. Send to DU2 through the third tunnel and the fourth tunnel.
  • the CU sends the downlink data packet to at least one DU through the corresponding tunnel according to the decision of the data packet repetition, and the corresponding RLC entity in the at least one DU correctly receives the downlink data packet, so that the at least one DU can correctly perform data
  • the package is repeated.
  • one RAN device may also consist of one CU and three or more DUs.
  • the method flow shown in FIG. 7 is also applicable to the interaction between each DU and CU.
  • the CU obtains the data packet repetition auxiliary information of three or more DUs, which can further optimize the decision of the data packet repetition, if there is more freedom to activate the appropriate logical link for data packet repetition, etc.
  • the CU is further divided into one CU-CP and one or more CU-UPs.
  • the CU-CP includes the control plane entity in the CU that processes the DRB
  • the CU-UP includes the user plane entity in the CU that processes the DRB. Therefore, for the user plane, the L2 protocol stack of this scenario is similar to that of Fig. 6, except that the CU in Fig. 6 becomes CU-UP. Since CU-UP only has user plane functions, DU and CU-UP also need to be connected to CU-CP and CU-CP provides control plane functions.
  • the DU In order to realize the data packet repetition, the DU needs to send auxiliary information to the CU-UP, which is sent to the CU-CP, and then the CU-CP decides the data packet repetition. It should be understood that for one DRB, multiple RLC entities are configured in the DU. Correspondingly, multiple tunnels are established between a CU-UP and a DU, and the number of tunnels is the same as the number of RLC entities of the DU.
  • the CU-CP configures multiple RLC entities of the DU through the control plane signaling of the F1-C interface, and notifies the CU-UP to which the DU is connected through the control plane signaling of the E1 interface of the configuration result;
  • the CU-CP sends the information of the multiple uplink tunnels of the CU-UP to the DU, and sends the information of the multiple downlink tunnels of the DU to the CU-UP.
  • the number of RLC entities or tunnels of the DU is determined by the CU-CP.
  • the CU-CP informs the DU of the maximum number of RLC entities or tunnels that it allows to establish through the control plane signaling of the F1-C interface, and the DU determines the number of RLC entities or tunnels by itself. And send the corresponding downlink tunnel information to CU-UP.
  • This article does not specifically limit the number of RLC entities of the DU.
  • the configuration of the CU-CP in the RLC entity of the DU is carried on a terminal device context setup request (UE context setup request) message or a terminal device context modification request (UE context modification request) message.
  • FIG. 8 shows a schematic flow diagram of the improved auxiliary information and its transfer method under a RAN device architecture divided into CU-CP, CU-UP and DU provided by an embodiment of the present application.
  • the method 800 can be applied to the RAN device architecture corresponding to FIG. 2(b), where one DU is connected to one CU-UP, the CU-UP is connected to the CU-CP, and the DU is also connected to the CU-CP.
  • the process described in Figure 8 includes the following steps:
  • the DU determines that the data packet repeats auxiliary information.
  • the data packet repetition auxiliary information determined by the DU is similar to the data packet repetition auxiliary information determined by the DU in step 701 of the foregoing embodiment, and details are not described herein again.
  • the DU sends the packet repeat auxiliary information to the CU-UP.
  • the CU-UP receives the repeated auxiliary information of the data packet sent by the DU.
  • This step is similar to step 702 in the foregoing embodiment, and will not be repeated here.
  • the DU sends the data packet repeated auxiliary information to the CU-UP through the auxiliary information data of the F1-U interface.
  • the DU before step 801, the DU also obtains its logical channel group or tunnel group.
  • CU-CP groups the logical channels of the DU or the tunnel between CU-UP and DU, and informs CU-UP and DU of the grouping; CU-UP and DU obtain the grouping The information can be saved and used later.
  • the DU groups its own logical channel or the tunnel between it and CU-UP, and informs CU-UP and CU-CP of the grouping; CU-UP and CU-CP After obtaining the logical channel grouping information, it can be saved and used later.
  • the CU-CP carries the logical channel grouping information or the tunnel grouping information on a bearer context setup request message or a bearer context modification request message and sends it to the CU-UP;
  • CU- The CP carries the logical channel grouping information or tunnel grouping information on the terminal device context setup request (UE context setup request) message or the terminal device context modification request (UE context modification request) message and sends it to the DU.
  • the CU-UP sends the data packet repeat auxiliary information to the CU-CP.
  • the CU-CP receives the data packet repeated auxiliary information sent by the CU-UP.
  • the CU-UP sends the repeated auxiliary information of the data packet received from the DU to the CU-CP.
  • the CU-UP sends auxiliary information data to the CU-CP through the E1 interface.
  • the auxiliary information data is carried in a bearer context modification request (bearer context modification requried) message.
  • step 801 the data packet repetition auxiliary information generated by the DU is granular with the logical channel group or tunnel group; in step 802, the data sent by the DU The packet repetition auxiliary information is also granular with the logical channel group or tunnel group; in step 803, the packet repetition auxiliary information sent by the CU-UP is also granular with the logical channel group or tunnel group.
  • the CU-CP decision data packet is repeated.
  • the CU-CP decides that the data packet is repeated according to the received data packet sent by the CU-UP and the auxiliary information is repeated.
  • This step is similar to step 703 in the foregoing embodiment, and will not be repeated here.
  • the DU can send the data packet repetition auxiliary information to the CU-CP through the CU-UP at the granularity of a logical channel, so that the CU-CP can effectively make the decision of data packet repetition.
  • the CU-CP may decide to activate multiple logical channels of at least one DU for data packet repetition according to the data packet repetition auxiliary information.
  • this embodiment of the present application further includes steps 805 and 806.
  • the CU-CP sends the data packet repeated transmission information to the CU-UP.
  • the CU-UP receives the repeated transmission information of the data packet sent by the CU-CP.
  • the CU-CP when the CU decides to activate at least one logical channel of a DU for data packet repetition, the CU-CP sends data packet repeated transmission information to the CU-UP, and the data packet repeated transmission information is used to indicate the activation of DU data
  • the transmission information of a logical channel may be at least one of the following parameters: the logical channel identifier of the logical channel, the logical channel index of the logical channel, the tunnel identifier of the tunnel corresponding to the logical channel, the tunnel index of the tunnel, and the The downstream tunnel transport layer address and TEID of the tunnel.
  • CU-CP sends the downlink tunnel information corresponding to these logical channels to CU-UP, so that CU-UP knows which tunnels will be downlinked
  • the data packet is sent to the corresponding DU.
  • CU-CP configures DRB, it configures the DRB in LH1, LH2, and LH3 of DU1 and LH4, LH5, and LH6 of DU2, and configures the corresponding LH1 to DU2 between CU-UP and DU1 and DU2.
  • the six tunnels of LH6, such as the first tunnel to the sixth tunnel, where the first tunnel corresponds to LH1, the second tunnel corresponds to LH2, and so on.
  • the CU-CP receives the packet repetition auxiliary information suggested by DU1 in LH1 and LH3 and the packet repetition suggested by DU2 in LH5 in step 803, and decides to activate LH2, LH3, and LH5 in step 804 To repeat the data packet, in this step, the CU-CP sends the respective downlink tunnel information of the second tunnel, the third tunnel and the fifth tunnel between the CU-UP and the DU corresponding to LH2, LH3, and LH5 to the CU -UP.
  • the data packet repetition auxiliary information is based on the logical channel group or tunnel group as the granularity
  • the CU-CP sends
  • the data packet repeated transmission information sent by the CU-UP includes transmission information of the at least one logical channel group or at least one tunnel group.
  • the transmission information of a logical channel group or tunnel group may be the transmission information of each logical channel in the logical channel group or each logical channel corresponding to the tunnel group.
  • the CU-UP sends a downlink data packet to the DU through at least one tunnel.
  • the CU-UP sends a downlink data packet to the DU according to the repeated transmission information of the data packet received in step 805.
  • the data packet repeated transmission information includes downlink tunnel information of at least one tunnel.
  • the CU-UP sends the downlink data packet to the at least one DU through the at least one tunnel.
  • CU-UP sends downlink data packets with the same PDCP sequence number to DU1 and DU2 through the second tunnel and the third tunnel respectively.
  • the CU instructs the CU-UP to send the downlink data packet to at least one DU through the corresponding tunnel according to the decision of data packet repetition, and the corresponding RLC entity in the at least one DU correctly receives the downlink data packet, so that the at least One DU can correctly repeat data packets.
  • the method flow shown in FIG. 8 is also applicable to the CU-UP connected to each DU and the interaction between the CU-UP and the CU when the CU-CP is connected to three or more DUs. It is worth noting that in the RAN device architecture shown in Figure 2(b), one DU can also be connected to multiple CU-UPs, and one CU-UP can also be connected to multiple DUs. For a DRB, in the DRB configuration process, the CU-CP is configured with multiple DUs and multiple CU-UPs for processing the DRB.
  • step 801 the multiple CU-UPs connected to a DU and the connection between the multiple CU-UPs and the CU-CP are determined, and each RLC entity in the DU is connected to the DU The tunnel between multiple CU-UPs is also determined.
  • the data packet repetition auxiliary information of the corresponding logical channel is sent to the CU-UP connected to the logical channel and sent by the CU-UP To CU-CP.
  • a DU is connected to the first CU-UP and the second CU-UP, and RLC1 and RLC2 in the DU are connected to the first CU-UP, RLC3 and RLC4 in the DU are connected to the second CU-UP Is connected, when the DU determines to send the wireless quality auxiliary information of LC1, LC2, and LC4, the DU sends the wireless quality auxiliary information of LC1 and LC2 to the first CU-UP, and the wireless quality auxiliary information of LC4 to the second CU -UP.
  • the computer program product includes one or more computer instructions.
  • the computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices.
  • the computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center integrated with one or more available media.
  • the usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • SSD solid state disk
  • FIG. 9 shows a schematic block diagram of a first network device 900 according to an embodiment of the present application.
  • the first network device 900 may correspond to (for example, may be configured in or be itself) the corresponding node described in the above method 500, or the above The distributed unit described in method 700, or the distributed unit described in method 800 above.
  • the first network device 900 may include a processor 901 and a transceiver 902, and the processor 901 and the transceiver 902 are communicatively coupled.
  • the first network device 900 further includes a memory 903, and the memory 903 is communicatively coupled with the processor 901.
  • the processor 901, the memory 903, and the transceiver 902 may be communicatively coupled, the memory 903 may be used to store instructions, and the processor 901 may be used to execute instructions stored in the memory 903 to control the transceiver 902 to receive and/or Send information or signals.
  • the processor 901 and the transceiver 902 are respectively configured to execute the corresponding node described in the above method 500, or the distributed unit described in the above method 700, or the distributed unit described in the above method 800, each action or Processing process.
  • detailed descriptions are omitted.
  • FIG. 10 shows another schematic block diagram of the first network device 1000 according to an embodiment of the present application.
  • the first network device 1000 may correspond to (for example, may be configured in or be itself) the corresponding node described in the above method 500, Or the distributed unit described in the above method 700, or the distributed unit described in the above method 800.
  • the first network device 1000 may include: a receiving module 1001, a processing module 1002, and a sending module 1003, and the processing module 1002 is communicatively coupled with the receiving module 1001 and the sending module 1003, respectively.
  • the first network device 1000 may take the form shown in FIG. 9.
  • the processing module 1002 may be implemented by the processor 901 in FIG. 9, and the receiving module 1001 and/or the sending module 1003 may be implemented by the transceiver 902 in FIG. 9.
  • the first network device 1000 may further include a storage unit for storing programs or data to be executed by the processing module 1002, or storing information received through the receiving module 1001 and/or sent through the sending module 1003.
  • Each module or unit in the first network device 1000 is respectively used to execute the corresponding node described in the above method 500, or the distributed unit described in the above method 700, or the distributed unit described in the above method 800, each of which is executed Action or process.
  • detailed descriptions are omitted.
  • FIG. 11 shows a schematic block diagram of a second network device 1100 according to an embodiment of the present application.
  • the second network device 1100 may correspond to (for example, may be configured in or be itself) the managed PDCP entity node described in the above method 500, Or the centralized unit described in the above method 700, or the centralized unit control plane network element described in the above method 800.
  • the second network device 1100 may include: a processor 1101 and a transceiver 1102, and the processor 1101 and the transceiver 1102 are communicatively coupled.
  • the second network device 1100 further includes a memory 1103, and the memory 1103 is communicatively coupled with the processor 1101.
  • the processor 1101, the memory 1103, and the transceiver 1102 may be communicatively coupled, the memory 1103 may be used to store instructions, and the processor 1101 may be used to execute instructions stored in the memory 1103 to control the transceiver 1102 to receive and/or Send information or signals.
  • the processor 1101 and the transceiver 1102 are respectively configured to execute the managed PDCP entity node described in the above method 500, or the centralized unit described in the above method 700, or the centralized unit control plane network element described in the above method 800. Each action or process.
  • detailed descriptions are omitted.
  • FIG. 12 shows another schematic block diagram of a second network device 1200 according to an embodiment of the present application.
  • the second network device 1200 may correspond to (for example, may be configured in or be itself) the managed PDCP entity described in the above method 500
  • the second network device 1200 may include: a receiving module 1201, a processing module 1202, and a sending module 1203, and the processing module 1202 is communicatively coupled with the receiving module 1201 and the sending module 1203, respectively.
  • the second network device 1200 may adopt the form shown in FIG. 11.
  • the processing module 1202 may be implemented by the processor 1101 in FIG.
  • the second network device 1200 may further include a storage unit for storing programs or data to be executed by the processing module 1202, or storing information received through the receiving module 1201 and/or sent through the sending module 1203.
  • Each module or unit in the second network device 1200 is used to execute the managed PDCP entity node described in the above method 500, or the centralized unit described in the above method 700, or the centralized unit control plane network element described in the above method 800, Each action or process performed.
  • detailed descriptions are omitted.
  • FIG. 13 shows a schematic block diagram of a third network device 1300 according to an embodiment of the present application.
  • the third network device 1300 may correspond to (for example, be configured in or be itself) the centralized unit user plane network described in the above method 800 yuan.
  • the third network device 1300 may include: a processor 1301 and a transceiver 1302, and the processor 1301 and the transceiver 1302 are communicatively coupled.
  • the third network device 1300 further includes a memory 1303, and the memory 1303 is communicatively coupled with the processor 1301.
  • the processor 1301, the memory 1303, and the transceiver 1302 may be communicatively coupled, the memory 1303 may be used to store instructions, and the processor 1301 may be used to execute instructions stored in the memory 1303 to control the transceiver 1302 to receive and/or Send information or signals.
  • the processor 1301 and the transceiver 1302 are respectively configured to execute the actions or processing procedures performed by the user plane network element of the centralized unit described in the above method 800.
  • detailed descriptions are omitted.
  • FIG. 14 shows another schematic block diagram of a third network device 1400 according to an embodiment of the present application.
  • the third network device 1400 may correspond to (for example, be configured in or be itself) the centralized unit user described in the above method 800 Surface network element.
  • the third network device 1400 may include: a receiving module 1401, a processing module 1402, and a sending module 1403, and the processing module 1402 is communicatively coupled with the receiving module 1401 and the sending module 1403, respectively.
  • the third network device 1400 may adopt the form shown in FIG. 13.
  • the processing module 1402 may be implemented by the processor 1301 in FIG. 13, and the receiving module 1401 and/or the sending module 1403 may be implemented by the transceiver 1302 in FIG. 13.
  • the third network device 1400 may further include a storage unit for storing programs or data to be executed by the processing module 1402, or storing information received through the receiving module 1401 and/or sent through the sending module 1403.
  • the modules or units in the third network device 1400 are respectively configured to execute the actions or processing procedures performed by the centralized unit user plane network element described in the above method 800.
  • detailed descriptions are omitted.
  • the processor (901, 1101, 1301) in the device embodiment of the present application may be a central processing unit (CPU), a network processor (NP), a hardware chip, or any combination thereof.
  • the aforementioned hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD) or a combination thereof.
  • the above-mentioned 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 memory (903, 1103, 1303) in the device embodiment of the present application may be a volatile memory (volatile memory), such as a random-access memory (RAM); it may also be a non-volatile memory (non-volatile memory).
  • volatile memory such as a random-access memory (RAM); it may also be a non-volatile memory (non-volatile memory).
  • -volatile memory such as read-only memory (ROM), flash memory (flash memory), hard disk drive (HDD) or solid-state drive (SSD); it can also be the above A combination of types of storage.
  • the disclosed device and method may be implemented in other ways.
  • the device embodiments described above are merely illustrative, for example, the division of units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated. To another system, or some features can be ignored, or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication coupling may be indirect coupling or communication coupling through some interfaces, devices or units, and may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.
  • the functional units in the various embodiments of the patent application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.
  • the function 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 patent application can be embodied in the form of a software product in essence or a part that contributes to the existing technology or a part of the technical solution, and the computer software product is stored in a storage medium. It contains several instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the various embodiments of the patent application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk and other media that can store program code .

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  • Computer Networks & Wireless Communication (AREA)
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Abstract

Des modes de réalisation de la présente invention concernent un procédé de distribution d'informations d'assistance qui est utilisé pour dupliquer des paquets de données. Le procédé comprend les étapes suivantes : un premier dispositif de réseau d'accès radio, RAN, détermine des premières informations, les premières informations comprenant des informations d'au moins un canal logique dans le premier dispositif de RAN ; et le premier dispositif de RAN envoie les premières informations à un second dispositif de RAN, les premières informations étant utilisées pour indiquer des informations d'assistance de duplication de paquets de données du premier dispositif de RAN. Le présent procédé peut assister efficacement le second dispositif de RAN dans la mise en œuvre d'une prise de décision pour une duplication de paquets de données.
PCT/CN2020/075359 2019-02-15 2020-02-14 Informations d'assistance ainsi que procédé et appareil pour les distribuer WO2020164614A1 (fr)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105025593A (zh) * 2014-04-23 2015-11-04 电信科学技术研究院 一种释放实体的方法及设备
US20160234726A1 (en) * 2015-02-05 2016-08-11 Mediatek Inc. Network Selection and Data Aggregation with LTE-WLAN Aggregation
US20170142770A1 (en) * 2014-03-21 2017-05-18 China Academy Of Telecommunications Technology Data packet processing method and device
CN107872837A (zh) * 2016-09-26 2018-04-03 北京信威通信技术股份有限公司 上行lwa 中数据分流的方法、装置和系统
CN108632229A (zh) * 2017-03-24 2018-10-09 电信科学技术研究院 一种多连接中的头压缩方法、解头压缩方法及装置
CN109041119A (zh) * 2017-06-08 2018-12-18 维沃移动通信有限公司 一种数据传输方法、相关设备及系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101389119B (zh) * 2007-09-11 2012-09-05 电信科学技术研究院 Lte系统小区切换过程中数据重传的方法及装置
US10764728B2 (en) * 2015-07-23 2020-09-01 Lg Electronics Inc. Method and apparatus for supporting V2X function for X2 procedure in wireless communication system
CN107295610B (zh) * 2016-04-01 2019-12-20 电信科学技术研究院 一种网络接入方法、相关设备和系统
CN109150388B (zh) * 2017-06-16 2022-06-21 北京三星通信技术研究有限公司 支持pdcp重复功能的系统、数据传输方法及网络设备

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170142770A1 (en) * 2014-03-21 2017-05-18 China Academy Of Telecommunications Technology Data packet processing method and device
CN105025593A (zh) * 2014-04-23 2015-11-04 电信科学技术研究院 一种释放实体的方法及设备
US20160234726A1 (en) * 2015-02-05 2016-08-11 Mediatek Inc. Network Selection and Data Aggregation with LTE-WLAN Aggregation
CN107872837A (zh) * 2016-09-26 2018-04-03 北京信威通信技术股份有限公司 上行lwa 中数据分流的方法、装置和系统
CN108632229A (zh) * 2017-03-24 2018-10-09 电信科学技术研究院 一种多连接中的头压缩方法、解头压缩方法及装置
CN109041119A (zh) * 2017-06-08 2018-12-18 维沃移动通信有限公司 一种数据传输方法、相关设备及系统

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