Self-adaption relay type preferential selecting method and relay node

Abstract

The invention discloses a self-adaption relay type preferential selecting method in wireless relay communication, aiming at improving the throughput of a relay link and reducing the processing time delay caused by the relay operation. According to the invention, a relay node self-adaptively regulates a relay mode and relays communication data and signaling in a relay manner according to the collected channel quality information. The self-adaption relay type preferential selecting method is suitable for various traditional relay communication systems. The invention discloses a relay node used for realizing the self-adaption relay type preferential selecting method.

Description

technical field [0001] The invention relates to a signal transmission optimization technology in a wireless communication system, in particular to an adaptive relay mode selection method used in a wireless relay communication system to improve link throughput and reduce relay processing delay. In addition, the present invention also proposes a relay node, which is used to realize the above-mentioned adaptive relay mode selection method. Background technique [0002] Higher communication rate and better signal coverage quality are the basic requirements of the next generation wireless communication system. Under the traditional cellular single-hop mobile communication framework, increasing system capacity and improving network coverage can only be accomplished by deploying base stations. However, the cost of base stations in a cellular communication system is very high, and their site selection also has high requirements, making it very costly to improve system service quali...

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Problems solved by technology

LG company proposed a hybrid AF-DF method, which reduces the delay caused by the DF method to a certain extent, but it requires the relay node to decode the source information regardless of whether it uses the AF or DF method. And it does not use channel state information for adaptive selection, sacrificing link throughput performance (see literature: 3GPP, R1-083657 "Hybrid of AF and DF in Layer-2 Relay", LG)

ZTE Corporation proposes to select the relay mode according to the type of service flow served by the relay node, but it does not take into account the channel status of each user equipment, which may cause the loss of system throughput (refer to the literature: 3GPP, R1-091439 , "Approach for Selection Relay Operation Mode Based on User Traffic Types", ZTE)

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