WO2020062799A1 - Procédé et système de communication relais et support de stockage - Google Patents

Procédé et système de communication relais et support de stockage Download PDF

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Publication number
WO2020062799A1
WO2020062799A1 PCT/CN2019/078680 CN2019078680W WO2020062799A1 WO 2020062799 A1 WO2020062799 A1 WO 2020062799A1 CN 2019078680 W CN2019078680 W CN 2019078680W WO 2020062799 A1 WO2020062799 A1 WO 2020062799A1
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WO
WIPO (PCT)
Prior art keywords
downlink
subframe
data
uplink
relay node
Prior art date
Application number
PCT/CN2019/078680
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English (en)
Chinese (zh)
Inventor
焦慧颖
Original Assignee
中国信息通信研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国信息通信研究院 filed Critical 中国信息通信研究院
Publication of WO2020062799A1 publication Critical patent/WO2020062799A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15542—Selecting at relay station its transmit and receive resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows

Definitions

  • the present invention relates to the field of communication technologies, and in particular, to a relay communication method, system, and storage medium.
  • Supporting wireless backhaul relay links enables more flexible and dense cell deployment.
  • the future mobile communication system can provide greater bandwidth, it can also deploy a large-scale Multiple-Input Multiple-Output (MIMO) system or a multi-beam system to provide a unified access and backhaul link. This opportunity has made it easier to deploy dense networks.
  • MIMO Multiple-Input Multiple-Output
  • FIG. 1 is a schematic diagram of an access and backhaul link in an existing implementation.
  • the relay node can multiplex the access and return links in time, frequency or space.
  • the access and backhaul links may be on the same frequency band or on different frequency bands, and the requirements of the access and backhaul links on the same frequency are more important because more compact interoperation is required to configure duplex restrictions to avoid interference .
  • the design of access and backhaul links should consider the limitations of duplex.
  • the relay link in the 4th generation long-term evolution (4G LTE: 4th Generation Long Term Evolution) system is the backhaul link and the access chain.
  • the channel is fully time-division multiplexed, and the return link can only be sent on the sub-frames of a multicast / multicast single-frequency network (MBSFN: Multicast Broadcast Single Frequency Network).
  • MBSFN Multicast Broadcast Single Frequency Network
  • An embodiment of the present application provides a relay communication method. Any subframe is configured as a downlink shared subframe or an uplink shared subframe.
  • the method includes:
  • the base station sends the downlink data of the backhaul link on the downlink shared subframe; receives the uplink data of the backhaul link on the uplink shared subframe;
  • the relay node receives the uplink data of the access link on the downlink shared subframe and receives the downlink data of the return link; sends the downlink data of the access link on the uplink shared subframe and sends the uplink data of the return link ;
  • the terminal sends uplink data of the access link on the downlink shared subframe; and receives downlink data of the access link on the uplink shared subframe.
  • An embodiment of the present application further provides a relay communication system, in which any subframe is configured as a downlink shared subframe or an uplink shared subframe; the system includes: a base station, a relay node, and a terminal;
  • a base station configured to send downlink data of a backhaul link on a downlink shared subframe; and receive uplink data of a backhaul link on an uplink shared subframe;
  • the relay node is configured to receive uplink data of the access link on the downlink shared subframe and receive downlink data of the return link; send downlink data of the access link on the uplink shared subframe and send the return link Uplink data;
  • the terminal is configured to send uplink data of the access link on the downlink shared subframe; and receive downlink data of the access link on the uplink shared subframe.
  • an embodiment of the present application further provides a computer storage medium, where the computer storage medium stores program instructions, and when the program instructions are executed, are used to implement the foregoing relay communication method.
  • FIG. 1 is a schematic diagram of a frame structure according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a relay communication process according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a dynamically adjusted subframe type according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of a relay communication system according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a computing device according to an embodiment of the present application.
  • An embodiment of the present application provides a relay communication method, in which a subframe in each frame is set as a downlink shared subframe and an uplink shared subframe, and a relay node can receive an access link for the downlink shared subframe.
  • the uplink data can also receive the downlink data of the return link; for the uplink shared subframe, the downlink data of the access link can be sent or the uplink data of the return link can be sent.
  • the subframes in each frame may be the following two types of subframes, specifically: a downlink shared subframe and an uplink shared subframe.
  • the type of the set subframe may be a server higher than the base station or a base station, which is not limited in the embodiment of the present application. After setting the type of each subframe, the base station, the relay node, and the terminal may be notified, or each base station, the intermediate node, and the terminal may be notified.
  • how many subframes are downlink shared subframes how many subframes are uplink shared subframes can be configured according to uplink and downlink traffic, and which subframe can be set as uplink shared subframes according to the transmission of uplink and downlink data. , Which subframe is the downlink shared subframe.
  • a configuration period can also be set, that is, the preset ratio is used as a period to reconfigure the ratio of uplink and downlink subframes.
  • FIG. 1 is a schematic diagram of a frame structure in an embodiment of the present application.
  • six subframes are taken as an example.
  • the first subframe is a downlink shared subframe (Shared Down)
  • the second subframe is an uplink shared subframe (Shared UL: Shared UpLink)
  • the third subframe is a third shared subframe.
  • the frame is a downlink shared subframe (Shared DL)
  • the fourth subframe is an uplink shared subframe (Shared UL)
  • the fifth subframe is an uplink shared subframe (Shared UL)
  • the sixth subframe is a downlink shared subframe (Shared DL).
  • a relay node and a terminal are taken as an example. In actual applications, the number of relay nodes and terminals is not limited.
  • FIG. 2 is a schematic diagram of a relay communication process according to an embodiment of the present application. The specific steps are:
  • Step 201 The base station sends downlink data of the backhaul link on the downlink shared subframe; and receives uplink data of the backhaul link on the uplink shared subframe.
  • the base station sends downlink data of the return link in the first, third, and sixth subframes, and the base station receives uplink data of the return link in the second, fourth, and fifth subframes.
  • Step 202 The relay node receives uplink data of the access link on the downlink shared subframe, and receives downlink data of the return link; sends downlink data of the access link on the uplink shared subframe, and sends the return link Uplink data.
  • the relay node receives uplink data (AC UL) of the access link, and receives downlink data (BHDL) of the return link.
  • the relay node sends downlink data (ACDL) of the access link, and sends uplink data (BHUL) of the return link.
  • frequency domain resource division may be performed in a static or semi-static manner.
  • frequency-domain resources are divided according to the amount of backhaul data and access data, so as to distinguish different resources.
  • the frequency resource block can be divided into 7 parts, and 3 of the 7 parts are selected for backhaul data, and the remaining 4 parts are used for access data.
  • the resource allocation may be a server at a higher level than the base station, or may be a base station, which is not limited in the embodiments of the present application.
  • the base station, the relay node, and the terminal may be notified, or each base station, the intermediate node, and the terminal may be notified.
  • the configuration for the time slot resources of the relay node is as follows:
  • the frequency domain resources in the time slot are divided into two parts: receiving downlink data for the backhaul link and receiving uplink data for the access link;
  • the frequency domain resources in the time slot are divided into two parts: uplink data for sending backhaul links and downlink data for access links.
  • Step 203 The terminal sends uplink data of the access link on the downlink shared subframe; and receives downlink data of the access link on the uplink shared subframe.
  • the terminal sends uplink data of the access link on the first, third, and sixth subframes; and the terminal receives downlink data of the access link on the second, fourth, and fifth subframes.
  • the base station and the relay node send unified downlink control signaling, as follows:
  • the base station sends downlink control signaling to the relay node accessing the base station for scheduling the resources of the relay node accessing the base station;
  • the relay node sends downlink control signaling to the relay node or terminal accessing the relay node, which is used to schedule resources of the relay node or terminal accessing the relay node.
  • the relay node once the relay node receives the uplink scheduling information, it sends uplink data in the uplink time slot of the shared time slot after the defined time slot. Once the relay node receives the downlink scheduling information, the relay node shares the access node with the access node. The downlink data is sent on the downlink time slot.
  • a further dynamic indication of the downlink shared subframe may be provided, and dynamic indication information (DI) may be added to indicate that the downlink subframe can be used to access the subframe.
  • DI dynamic indication information
  • the base station When the base station needs to adjust the frame type, it sends downlink indication information (DI) on the corresponding downlink shared subframe; it is used to indicate that the downlink shared subframe is set to access the downlink subframe (DL TX), which is used to send the downlink connection.
  • DI downlink indication information
  • DL TX downlink subframe
  • the relay node When the relay node receives downlink indication information (RX) indicating that the current subframe is used as an access downlink subframe on the downlink shared subframe, the relay node uses the downlink shared subframe as an access downlink subframe for sending access. Downlink data of the link.
  • RX downlink indication information
  • FIG. 3 is a schematic diagram of dynamically adjusting a subframe type according to an embodiment of the present application.
  • downlink instruction information 301 is sent in a sixth subframe (in a downlink shared subframe), which is used to indicate to a relay node that the subframe is used to access a downlink subframe, and the relay node receives the downlink instruction information 302. Then, the subframe is used to access the link, and resources are scheduled to the terminal.
  • FIG. 4 is a schematic diagram of a relay communication system according to an embodiment of the present application.
  • any subframe is configured as a downlink shared subframe or an uplink shared subframe; the system includes: a base station 401, a relay node 402, and a terminal 403;
  • the base station 401 is configured to send downlink data of a backhaul link on a downlink shared subframe; and receive uplink data of a backhaul link on an uplink shared subframe;
  • the relay node 402 is configured to receive uplink data of the access link on the downlink shared subframe and receive downlink data of the return link; send downlink data of the access link on the uplink shared subframe and send the back link Uplink data
  • the terminal 403 is configured to send uplink data of the access link on the downlink shared subframe; and receive downlink data of the access link on the uplink shared subframe.
  • the relay node 402 is further configured to divide the frequency domain resources in the time slot into the downlink data for receiving the backhaul link and the uplink data for the access link for the shared downlink time slot. Two parts: For the shared uplink time slot, the frequency domain resources in the time slot are divided into two parts: sending uplink data for the backhaul link and sending downlink data for the access link.
  • the base station 401 is further configured to send downlink control signaling to a relay node accessing the base station for scheduling resources of the relay node accessing the base station;
  • the relay node 402 is further configured to send downlink control signaling to a relay node or terminal accessing the relay node, and is used to schedule resources of the relay node or terminal accessing the relay node.
  • the frequency domain resources are divided according to the amount of backhaul data and access data.
  • frequency domain resource partitioning is performed in a static or semi-static manner.
  • the base station 401 when the base station 401 needs to adjust the frame type, it sends downlink indication information on the corresponding downlink shared subframe;
  • the relay node 402 When the relay node 402 receives downlink instruction information indicating that the current subframe is used as an access downlink subframe on the downlink shared subframe, the downlink node 402 is used as an access downlink subframe to send an access link. Down data.
  • the relay node can receive uplink data of the access link for the downlink shared subframe, or Receive the downlink data of the return link; for the uplink shared subframe, the downlink data of the access link can be sent, and the uplink data of the return link can also be sent.
  • This solution can improve resource utilization. Add downlink indication information to the downlink shared subframe, indicating that the subframe can be used to access the subframe, so that after receiving the indication information, the relay node can schedule the access link information for the terminal on the subframe, so that The scheduling method is more flexible.
  • FIG. 5 is a schematic structural diagram of a computing device according to an embodiment of the present application.
  • the computing device may be a base station or a terminal, including a power supply, various types of housings, and the like.
  • the server may further include: at least one processor 501, an input interface 503, and an output interface 504.
  • the input interface 503 may be some network interfaces or user interfaces.
  • the storage device 505 may include volatile memory, such as random-access memory (RAM); and the storage device 505 may also include non-volatile memory, such as fast memory. Flash memory (flash memory), solid state drive (solid state drive (SSD), etc.); the storage device 505 may further include a combination of the above types of memories.
  • RAM random-access memory
  • non-volatile memory such as fast memory. Flash memory (flash memory), solid state drive (solid state drive (SSD), etc.); the storage device 505 may further include a combination of the above types of memories.
  • the processor 501 may be a central processing unit (CPU). In one embodiment, the processor 501 may further include a hardware chip.
  • the above hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or the like.
  • the PLD may be a field-programmable gate array (FPGA), a generic array logic (GAL), or the like.
  • the storage device 505 is further configured to store program instructions.
  • the processor 501 may call the program instructions to implement the various methods and steps mentioned above.
  • the program can be stored in a computer-readable storage medium.
  • the program When executed, the processes of the embodiments of the methods described above may be included.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM), or a random access memory (Random, Access Memory, RAM).

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

Abstract

La présente invention concerne un procédé et un système de communication relais. Toute sous-trame est conçue pour être une sous-trame partagée de liaison descendante ou une sous-trame partagée de liaison montante. Le procédé comprend les étapes consistant à : envoyer par une station de base des données de liaison descendante d'une liaison terrestre sur la sous-trame partagée de liaison descendante, et recevoir des données de liaison montante de la liaison terrestre sur la sous-trame partagée de liaison montante ; recevoir par un nœud de relais des données de liaison montante d'une liaison d'accès et les données de liaison descendante de la liaison de liaison terrestre sur la sous-trame partagée de liaison descendante, et envoyer des données de liaison descendante de la liaison d'accès et les données de liaison montante de la liaison terrestre sur la sous-trame partagée de liaison montante ; et envoyer par un terminal les données de liaison montante de la liaison d'accès sur la sous-trame partagée de liaison descendante, et recevoir les données de liaison descendante de la liaison d'accès sur la sous-trame partagée de liaison montante.
PCT/CN2019/078680 2018-09-25 2019-03-19 Procédé et système de communication relais et support de stockage WO2020062799A1 (fr)

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CN201811113139.1A CN110061771A (zh) 2018-09-25 2018-09-25 一种中继通信方法和系统
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CN103814532A (zh) * 2011-09-23 2014-05-21 华为技术有限公司 混合带内/带外中继
CN105264963A (zh) * 2013-12-30 2016-01-20 华为技术有限公司 一种传输回程数据的方法、装置和系统

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CN103139869B (zh) * 2011-11-24 2015-07-29 华为技术有限公司 一种上下行数据传输方法和无线接入点
KR20150026736A (ko) * 2013-09-02 2015-03-11 주식회사 케이티 무선통신 시스템에서 하향 링크 제어 채널 송수신 방법 및 장치
GB2550218B (en) * 2016-05-13 2022-01-05 Nokia Solutions & Networks Oy Method system and apparatus
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Publication number Priority date Publication date Assignee Title
US20120275352A1 (en) * 2009-12-31 2012-11-01 Zte Corporation Wireless relay device and method for wireless relay device to communicate with base station and terminal
CN103814532A (zh) * 2011-09-23 2014-05-21 华为技术有限公司 混合带内/带外中继
CN103166880A (zh) * 2011-12-15 2013-06-19 中国移动通信集团公司 上行解调导频的发送方法、接收方法、基站及移动中继
CN105264963A (zh) * 2013-12-30 2016-01-20 华为技术有限公司 一种传输回程数据的方法、装置和系统

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