A source-relay selection scheme with power allocation for asymmetric two-way relaying networks in underground mines

Authors:
Song Li;Yanjing Sun;Rufei Ma
Affiliations:
School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, China;School of Information and Electrical Engineering, China University of Mining and Technology, Xuzhou, China;School of Electronics and Information Engineering, Tongji University, Shanghai, China
Venue:
WASA'13 Proceedings of the 8th international conference on Wireless Algorithms, Systems, and Applications
Year:
2013

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Abstract

In this paper, the two-way opportunistic amplify-and-forward relaying system with multi-source multi-relay in underground tunnel is investigated; in which two sources intend to exchange information with help of one relay. The joint source-relay selection with power allocation is proposed to minimize the total transmit power subject to constraints on the received signal-to-noise-ratio (SNR) of each source node. We show that this problem has a closed-form solution and requires only a few parameters to be broadcasted to all relays during the source-relay selection period. Simulation results show that the outage probability can be substantially decreased using the proposed power allocation scheme when two source node have different quality of service (QoS) requirement, comparing to existing power allocation algorithms.