Traffic-Aware Channelization Medium Access Control for Wireless Ad Hoc Networks  

无线Ad Hoc网络中基于业务感知的多信道MAC协议(英文)

作　　者：史春光 赵海涛 张少杰 马东堂 魏急波 

机构地区：[1]College of Electronic Science and Engineering, National University of Defense Technolog [2]Department of Technology, Taiyuan Satellite Launch Center [3]State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System

出　　处：《China Communications》2013年第4期88-100,共13页中国通信（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant No. 61002032;the Doctoral Fund of Ministry of Education of China under Grant No. 20094307110004

摘　　要：Existing multi-channel Medium Access Control (MAC) protocols have been demonstrated to significantly increase wireless network performance compared to single channel MAC protocols. Traditionally, the channelization structure in IEEE 802.11 based wireless networks is pre-configured, and the entire available spectrum is divided into subchannels and equal channel widths. In contrast, this paper presents a Traffic-Aware Channelization MAC (TAC-MAC) protocol for wireless ad hoc networks, where each node is equipped with a single half duplex transceiver. TAC-MAC works in a distributed, fine-grai-ned manner, which dynamically divides variable-width subchannels and allocates subchannel width based on the Orthogonal Frequency Division Multiplexing (OFDM) technique according to the traffic demands of nodes. Simulations show that the TAC-MAC can significantly improve network throughput and reduce packet delay compared with both fixed-width multi-channel MAC and single channel 802.11 protocols, which illustrates a new paradigm for high-efficient multi-channel MAC design in wireless ad hoc networks.Existing multi-channel Medium Access Control （MAC） protocols have been demonstrated to significantly increase wireless network performance compared to single channel MAC protocols. Traditionally, the channelization structure in IEEE 802.11 based wireless networks is pre-configured, and the entire available spectrum is divided into sub- channels and equal channel widths. In contrast, this paper presents a Traffic-Aware Channeli- zation MAC （TAC-MAC） protocol for wire- less ad hoc networks, where each node is equi- pped with a single half duplex transceiver. TAC-MAC works in a distributed, fine-grai- ned manner, which dynamically divides vari- able-width sub-channels and allocates sub- channel width based on the Orthogonal Fre- quency Division Multiplexing （OFDM） tech- nique according to the traffic demands of nodes Simulations show that the TAC-MAC can sig- nificantly improve network throughput and reduce packet delay compared with both fixed- width multi-channel MAC and single channel 802.11 protocols, which illustrates a new parad- igm for high-efficient multi-channel MAC design in wireless ad hoc networks.

关 键 词：wireless ad hoc networks multi-channel MAC TAC IEEE 802.11 

分 类 号：TN929.5[电子电信—通信与信息系统]