| 基于信道反馈的协作MAC协议 |
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| 引用本文： | 宋振峰,王晓湘,张鸿涛,刘臻.基于信道反馈的协作MAC协议[J].北京邮电大学学报,2009,32(4):46-49. |
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| 作者姓名： | 宋振峰 王晓湘 张鸿涛 刘臻 |
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| 作者单位： | 北京邮电大学信息与通信工程学院 北京邮电大学 北京邮电大学信息与通信工程学院 北京邮电大学 |
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| 基金项目： | 国家高技术研究发展计划项目 |
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| 摘 要： | 在协作媒体接入控制层协议CoopMAC基础上，提出一种改进控制帧格式的协议I oopMAC. 改进后的协议能实现与IEEE 802.11 DCF协议兼容；利用中继和信宿的联合信道状态反馈信息确定站点传输方式,较好地适应信道的瞬时变化；采用新的网络分配向量NAV更新机制，减小了分组碰撞时周围站点延迟接入信道的时间. 仿真结果表明，同样条件下，I CoopMAC协议能获得比CoopMAC协议更高的吞吐量及更小的接入时延.
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| 关 键 词： | IEEE 802.11 协作 MAC协议 网络分配向量 |
| 收稿时间： | 2008-11-14 |
| 修稿时间： | 2009-3-24 |
A Channel Feedback Based Cooperative MAC Protocol |
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| SONG Zhen-feng,WANG Xiao-xiang,ZHANG Hong-tao,LIU Zhen.A Channel Feedback Based Cooperative MAC Protocol[J].Journal of Beijing University of Posts and Telecommunications,2009,32(4):46-49. |
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| Authors: | SONG Zhen-feng WANG Xiao-xiang ZHANG Hong-tao LIU Zhen |
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| Abstract: | An improved cooperative medium access control (MAC) protocol, called I CoopMAC, is proposed for wireless networks. The protocol adopts a new frame control format and is completely compatible with the legacy 802.11 distributed coordination function (DCF). To adapt to dynamical channel variation, joint feedback of instantaneous channel state information from both destination node and relay node is used. Moreover, a new network allocation vector mechanism is adopted to reduce access delay at the stations caused by collisions. It is shown that I CoopMAC can increase the throughput of the whole network and reduce the average packet delay, compared to CoopMAC protocol. |
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| Keywords: | IEEE 802 11 Cooperation MAC NAV |
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