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

作　　者：LIU Jian LONG KePing XU Jie 

机构地区：[1]School of Communication and Information Engineering, University of Electronic Science and Technology, Chengdu 611731, China

出　　处：《Science China(Information Sciences)》2011年第7期1444-1455,共12页中国科学（信息科学）（英文版）

基　　金：supported by the Chang Jiang Scholars Program of the Ministry of Education of China;the National Science Foundation for Distinguished Young Scholars (Grant No.60725104);the National Basic Research Program of China (Grant No.2007CB310706);the National Natural Science Foundation of China (Grant Nos.60873263,60932002,60932005);the National High-Tech Research and Development Program Program (Grant Nos.2008AA011001,2008AA011002,2009AA01Z254,2009AA01Z215);Program for New Century Excellent Talents in University,the Fundamental Research Foundations for the Central Universities (Grant No.ZYGX2009J005);Sichuan Youth Science and Technology Foundation (Grant No.09ZQ026-032)

摘　　要：In this paper, we propose a new media access control （MAC） protocol, which is compatible with the IGEE 802.16e-2005 Orthogonal Frequency Division Multiple Access （OFDMA） wireless interface. In this protocol, the same radio resource can be shared by neighboring ceils 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.In this paper, we propose a new media access control （MAC） protocol, which is compatible with the IGEE 802.16e-2005 Orthogonal Frequency Division Multiple Access （OFDMA） wireless interface. In this protocol, the same radio resource can be shared by neighboring ceils 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.

关 键 词：orthogonal frequency division multiple access （OFDMA） 802.16e overlapping area wireless mesh network （WMN） cross layer design dynamic subcarrier allocation （DSA） dynamic power allocation （DPA） Markov chain 

分 类 号：TN929.533[电子电信—通信与信息系统] TN925.93[电子电信—信息与通信工程]