Multi-jumper radio relay communication system and its download data transmission method

A wireless relay and downlink data technology, applied in the field of communication, can solve problems such as the inability to realize multi-hop data transmission

Active Publication Date: 2008-03-26
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0018] In view of this, the purpose of the present invention is to provide a multi-hop wireless relay communication system and its downlink data transmis

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  • Multi-jumper radio relay communication system and its download data transmission method
  • Multi-jumper radio relay communication system and its download data transmission method
  • Multi-jumper radio relay communication system and its download data transmission method

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Embodiment Construction

[0116] Table 1 is a schematic diagram of the storage format of the routing database in the present invention.

[0117] In the present invention, as shown in Table 1, the routing database is composed of three domains, including a next hop relay station (Next Hop) domain, a path identification (Path ID) domain and a connection identification (CID) domain. The next hop relay station (Next Hop) field is used to store the next hop relay station identifier and the number of next hop relay stations, the path identifier field is used to store the path identifier and the number of paths passing through the current node, and the connection identifier field is used to store the The number of user terminal connection identifiers and user terminal connection identifiers of each path. Wherein, a path (Path) refers to an ordered set of all relay stations passed through by a connection from a BS (Base Station, Base Station) to a certain terminal, and each path is assigned an identifier called...

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Abstract

The invention discloses a method for transmitting downlink data, which is applied in multi-hop wireless relay communications system. The method includes the following steps: a base station and each relay station are respectively provided with a route database stored with a corresponding relationship which includes the connection mark of a consumer terminal and a mark of a relay station in the next hop; in the route database, a node device searches a connection mark of the packet head of a downlink Media Access Control Protocol Data Unit (MPDU); in case that the route database has the connection mark, the node device obtains the mark of all the relay stations in the next hop corresponding to the connection mark according to the corresponding relationship; then transmits the downlink Media Access Control Protocol Data Unit (MPDU) to all the relay stations in the next hop and to the user terminal finally. The invention realizes data transmission of multi-hop wireless communications system without changing the protocol structure of existing UE and core network. Furthermore, the invention also discloses a multi-hop wireless relay communications system as well as a base station and a relay station applied in the system.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a multi-hop wireless relay communication system and a downlink data transmission method thereof. Background technique [0002] In a wireless communication system, due to path attenuation of electromagnetic waves or building occlusion, some places become areas with low wireless communication signal strength, and the communication quality of mobile user terminals located in these areas will become very poor. As people's demand for broadband wireless communication increases day by day, the demand for wireless bandwidth becomes larger and larger, so higher and higher carrier frequencies are used in new protocols and systems. However, since the attenuation of radio waves increases with the increase of frequency, high carrier frequencies must face the problem of high attenuation, which further limits the coverage of base stations. [0003] In order to solve the coverage problem ...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L12/28
CPCH04W88/04H04W40/22H04W8/26
Inventor 张爱民尚政冯成燕李江
Owner HUAWEI TECH CO LTD
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