Cognitive relay protocol: design, implementation and evaluation

Authors:
Chun-Ta Kung;Ko-Wei Ma;Hung-Yu Wei
Affiliations:
National Taiwan University, Taipei, Taiwan;National Taiwan University, Taipei, Taiwan;National Taiwan University, Taipei, Taiwan
Venue:
ACM SIGMOBILE Mobile Computing and Communications Review
Year:
2010

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Abstract

In this paper, we design and implement a cognitive relay protocol (CogRelay) in MAC layer to efficiently relay data packets. The proposed scheme chooses high quality relay links to prevent unnecessary relay, thereby enhancing relay efficiency and acquiring higher throughput. The relaying overhead is light since there is no extra transmission compared with direct communication. Universal Software Radio Peripheral (USRP) testbed experiments show that CogRelay can efficiently boost packet reception ratio and throughput in multi-node relay network.