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A novel radio resource allocation scheme for IEEE 802.16e multicell networks

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In this paper,we propose a new media access control (MAC) protocol,which is compatible with the IEEE 802.16e-2005 Orthogonal Frequency Division Multiple Access (OFDMA) wireless interface.In this protocol,the same radio resource can be shared by neighboring cells in the wireless mesh network (WMN) and collisions can be reduced in the overlapping areas.This protocol consists of two schemes:a downlink transmission and an uplink transmission.For downlink transmission we use a cross layer adaptive radio resource allocation (CL-ARRA) scheme,which consists of two steps:a dynamic subcarrier allocation (DSA) and a dynamic power allocation (DPA).For uplink transmission we propose a new subcarrier backoff scheme and use the Markov chain model to analyze this scheme.With this protocol,we analyze the performance of the downlink and the uplink operation in the OFDMA mode.The analytical results are well matched to the simulation results.We then extend our model to a star-mesh topology with multiple overlapped regions.Simulation results show that the performance can be improved with the application of the superior capability of our proposed MAC protocol to deal with collisions in the overlapped regions.

orthogonal frequency division multiple access (OFDMA)802.16eoverlapping areawireless meshnetwork (WMN)cross layer designdynamic subcarrier allocation (DSA)dynamic power allocation (DPA)Markov chain

LIU Jian、LONG KePing、XU Jie

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School of Communication and Information Engineering, University of Electronic Science and Technology, Chengdu 611731, China

Chang Jiang Scholars Program of the Ministry of Education of ChinaNational Science Foundation for Distinguished Young Scholars国家重点基础研究发展规划(973计划)国家自然科学基金国家自然科学基金国家自然科学基金National High-Tech Research and Development Program ProgramNational High-Tech Research and Development Program ProgramNational High-Tech Research and Development Program ProgramNational High-Tech Research and Development Program Program教育部新世纪优秀人才支持计划Fundamental Research Foundations for the Central UniversitiesSichuan Youth Science and Technology Foundation

607251042007CB3107066087326360932002609320052008AA0110012008AA0110022009AA01Z2542009AA01Z215ZYGX2009J00509ZQ026-032

2011

10.1007/sl1432-011-4234-7

中国科学:信息科学(英文版)
中国科学院

中国科学:信息科学(英文版)

SCIEI
影响因子：0.715
ISSN：1674-733X
年,卷(期)：2011.54(7)