Design and Evaluation of CRDMAC： Circular RTR Directional MAC Protocol for WANETs

作     者：Lu Huang Li Jie Dong Zhongping Ji Yusheng 

作者机构：Department of Computer Science University of Tsukuba Tsukuba Science City3058573 Ibaraki Japan Fujitsu Limited Yokosuka 2390847 Kanagawa Japan Information Systems Architecture Science Research Division National Institute of Informatics Tokyo 1018460 Japan 

基　　金：supported by the Grant-in-Aid for Scientific Research of Japan Society for Promotion of Science(JSPS) Collaboration Research Grant of National Institute of Informatics (NII) ,Japan 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2012年第9卷第6期

页      码：1-13页

摘      要：Using directional antennas in Wireless Ad hoc Networks (WANETs) offers great potential of reducing the radio interference, and improving the communication throughput. Directional antennas, however, introduces new problems in the wireless Media Access Control (MAC), that is, the deafness and new hidden terminal problem, which may cause severe performance degradation. To solve the problems, we propose an effective Circular RTR Directional MAC (CRDMAC) protocol for WANETs by using a sub-transmission channel and Ready to Receive (RTR) packets, which modifies the IEEE 802.11 Distributed Coordinated Function (DCF). The sub-channel avoids collisions to other ongoing transmission, and the RTR packets notify the neighbor nodes that the mutual transmission has been finished. We evaluate the CRDMAC protocol through simulations and the results show that the proposed protocol outperforms existing DMAC (directional MAC) protocol and the CRCM (Circular RTS and CTS MAC) protocol in terms of throughput and packet drop rate.

主 题 词：WANETs MAC protocol directionalantenna deafness new hidden terminal 

学科分类：0810[工学-土木类] 080703[080703] 082502[082502] 08[工学] 0807[工学-电子信息类] 081001[081001] 0825[工学-环境科学与工程类] 

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