Inter-cell coordinated resource allocation for mobile WiMAX system

Authors:
Li Chen;Wenwen Chen;Xin Zhang;Yong Zhang;Cong Xiong;Dacheng Yang
Affiliations:
Wireless Theories and Technologies, Beijing University of Posts and Telecommunications, Beijing, China;Wireless Theories and Technologies, Beijing University of Posts and Telecommunications, Beijing, China;Wireless Theories and Technologies, Beijing University of Posts and Telecommunications, Beijing, China;China Mobile Communications Corporation, Beijing, China;Wireless Theories and Technologies, Beijing University of Posts and Telecommunications, Beijing, China;Wireless Theories and Technologies, Beijing University of Posts and Telecommunications, Beijing, China
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

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Abstract

OFDM has become one of the most important Beyond- 3G transmission technologies. Mobile WiMAX is a typical representative of OFDM systems. The cross-layer optimization problem of inter-cell coordinated resource allocation for OFDM systems is addressed in this paper. We first analyze the problem by utility-based method, and formulate this optimization problem. Then the globally optimal and a sub-optimal inter-cell resource allocation strategy are proposed respectively in multicell scenario. Finally, Mobile WiMAX system is taken as an example for evaluation by system level simulation. The results show that the inter-cell resource allocation strategy can achieve better fairness among users in the entire network. Besides, intercell adaptive power allocation can enhance the throughput performance while considering the interference of neighbor cells. And the cell-edge throughput gain decreases with the increase of the number of users in one sector.