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The Improvement of Relay Selection Schemes in Two-Hop Cellular Networks
School of Automotive Engineering, Beijing Geely University, Beijing, China
- 1 School of Automotive Engineering, Beijing Geely University, Beijing, China
International Journal of Communications, Network and System Sciences·Volume 10 (2017)·Pages 98–107·Published 14 August 2017·DOI10.4236/ijcns.2017.108B011
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Abstract
In wireless networks, cooperative relaying could improve throughput by exploiting diversity. In order to reduce the amount of feedback for the channel gain, a semi-distributed scheme based on the relay feasible condition is proposed. Each relay node can measure its backward and forward channel gains. If both the channel gains are larger than a pre-defined threshold, this relay node is feasible. The final decision on the best relay selection is still given by the base station. Besides, the switch-and-examine relay selection scheme, which selects the first feasible relay node, is also investigated. Simulation results are presented to illustrate the advantage of two proposed schemes.
KeywordsRelay SelectionCooperative RelayingAmplify-and-ForwardCellular Networks
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