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Network-Coding-Based Hybrid-ARQ for Two-Way Relaying

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4 Author(s)
Xiaoye Shi ; State Key Lab. of Integrated Service Networks, Xidian Univ., Xi''an, China ; Jianhua Ge ; Yancheng Ji ; Chuiqiang Sun

Network coding is a promising technique to improve the throughput performance of wireless networks. In this paper, we propose a novel network-coding-based hybrid retransmission request protocol for two-way relaying system. The proposed protocol can retransmit more information in a given time interval by introducing network coding in the retransmission process, thus improving the throughput. Furthermore, we derive the frame error rate and delay performance using the L-ary pulse amplitude modulation by solving Markov state transition equations. Applying these results, the closed-form approximate solution of the throughput is acquired. Numerical results have validated our analytical results, and demonstrated that the proposed protocol outperforms the traditional hybrid retransmission request protocol for two-way relaying system by a throughput gain of about 9% when the relay lies close to the midpoint of the two users.

Published in:

Intelligent Networking and Collaborative Systems (INCoS), 2012 4th International Conference on

Date of Conference:

19-21 Sept. 2012

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