Relay Selection Strategy in Cognitive Radio Networks with Two-Way Relaying to Achieve Lifetime Maximization

doi:10.13190/j.jbupt.2013.06.022

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2013, Vol. 36 ›› Issue (6): 102-107.doi: 10.13190/j.jbupt.2013.06.022

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Relay Selection Strategy in Cognitive Radio Networks with Two-Way Relaying to Achieve Lifetime Maximization

WANG Ying, XU Ming-yue, ZHANG Wei-dong

State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China

Received:2013-04-03 Online:2013-12-31 Published:2013-10-08

Abstract

Abstract:

A relay node selection strategy was proposed to improve the long-term throughput and extend the lifetime of system. Based on decode-and-forward relay protocol, the secondary user was pretended as a relay node of the primary system to assist the primary user pair to communicate. Meanwhile, data transmission for the secondary system was achieved. The proposed strategy introduces three factors, i.e. the transmit power required for each data transmission, the remaining energy of relay nodes as well as the probability of system outage. Therefore, the long-term throughput can be improved and the lifetime of system can be extended effectively.

Key words: cognitive radio, two-way relaying, lifetime maximization, relay selection

CLC Number:

TN929.53

WANG Ying, XU Ming-yue, ZHANG Wei-dong. Relay Selection Strategy in Cognitive Radio Networks with Two-Way Relaying to Achieve Lifetime Maximization[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2013, 36(6): 102-107.

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Relay Selection Strategy in Cognitive Radio Networks with Two-Way Relaying to Achieve Lifetime Maximization

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