Interference-aware relay selection for multiple source-destination cooperative networks

Authors:
Jie Xu;Sheng Zhou;Zhisheng Niu
Affiliations:
Tsinghua National Laboratory for Information Science and Technology, Dept. of Electronic Engineering, Tsinghua University, Beijing, China;Tsinghua National Laboratory for Information Science and Technology, Dept. of Electronic Engineering, Tsinghua University, Beijing, China;Tsinghua National Laboratory for Information Science and Technology, Dept. of Electronic Engineering, Tsinghua University, Beijing, China
Venue:
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Year:
2009

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Abstract

We consider relay selection in a multiple sourcedestination cooperative network with multiple potential relays. Interference induced by simultaneous transmissions makes relay selection different from interference-free scenarios which has not been weD addressed in literature. In this paper, we propose a new relay selection metric in interference-limited networks in order to improve network throughput. The proposed metric is interference-aware and abstracts the potential interference to the neighborhood as a penalty. Based on the metric, a centralized scheme is proposed to formulate the relay selection problem into a weighted matching problem. A distributed version is further designed based on negotiations which guarantees stability and quick convergence. Simulation results indicate a significant improvement in overall transmission rate over selection metrics of interference-free scenarios, i.e., about 10%.