Multi-hop wireless relay communication system and download data transmission method and device

Abstract

The present invention discloses a descending data transmission method which is applied in a multi-hop wireless relay communication system. The method comprises the following procedures: respectively arranging a routing data base in a base station and each relay station, wherein the routing data base is stored with a path identification, an identification of the next hop relay station and a corresponding relationship of a QoS parameter, and the routing data base of the base station also comprises a corresponding relationship between a connecting identification and the path identification of the user terminal; searching the path identification in the routing data base by a node apparatus; and if the routing data base is provided with the path identification, obtaining an identification of next hop relay station corresponding with the path identification by the node apparatus according to the corresponding relationship, and then transmitting the descending data block to the obtained nexthop relay station till the user terminal. The invention can realize the data transmission of the multi-hop wireless relay communication system without the protocol structure of the existing UE and core network. The invention also discloses a multi-hop wireless relay communication system, and a base station and a relay station which are applied in the system.

Description

Technical field [0001] The present invention relates to the field of communication technology, in particular to a multi-hop wireless relay communication system and its downlink data transmission method and device. Background technique [0002] In a wireless communication system, due to electromagnetic wave path attenuation or building blockage, some places become areas with low wireless communication signal strength, and the communication quality of mobile user terminals in these areas will become poor. With the increasing demand for broadband wireless communication, the demand for wireless bandwidth has become 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 increasing frequency, high carrier frequencies are bound to face the problem of high attenuation, which further limits the coverage of base stations. [0003] In order to solve the coverage problem of the base statio...

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Problems solved by technology

[0019] In view of this, the purpose of the present invention is to provide a multi-hop wireless relay communication system and its downlink data transmission method and device, to solve the problem that multi-hop data transmission cannot be realized in the multi-hop wireless relay communication system in the prior art

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