Multiple frequency reuse schemes in the two-hop IEEE 802.16j wireless relay networks with asymmetrical topology

Authors:
Weiwei Wang;Zihua Guo;Jun Cai;Xuemin(Sherman) Shen;Changjia Chen
Affiliations:
School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing, China;Lenovo Cooperate Research, Beijing, China;Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, Man., Canada;Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ont., Canada;School of Electronics and Information Engineering, Beijing Jiaotong University, Beijing, China
Venue:
Computer Communications
Year:
2009

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Abstract

In this paper, throughput performance of the access links (i.e., base station to mobile station and relay station to mobile station) is analyzed for the two-hop IEEE 802.16j wireless relay networks with asymmetrical topology. In specific, three frequency reuse schemes are proposed to improve the spectrum efficiency of the access links: (1) an isolation band based frequency reuse scheme (IBFRS) which introduces an isolation band surrounding each relay station (RS) cluster (i.e, a separate RS or several adjacent RSs) so that the throughput of the access link can be improved by allowing frequency reuse between RSs and the base station (BS); (2) the dynamic frequency power partition (DFPP) scheme for reusing the frequency among RSs; (3) the selective reuse (SR) scheme for the RSs to further selectively reuse the frequency in the isolation band according to the interference measurement. Comprehensive simulation shows that by applying the proposed IBFRS+DFPP+SR, the throughput of the access link can be significantly improved.