| 一种面向实时业务的Ad Hoc网络MAC协议 |
| |
| 引用本文： | 韦蓉,;宇天航,;武穆清.一种面向实时业务的Ad Hoc网络MAC协议[J].南京邮电学院学报(自然科学版),2008(2):58-62. |
| |
| 作者姓名： | 韦蓉 ;宇天航 ;武穆清 |
| |
| 作者单位： | [1]北京邮电大学通信网络综合技术研究所,北京100876; [2]北京跟踪与通信技术研究所,北京100094; [3]北京航天飞行控制中心,北京100094 |
| |
| 基金项目： | 国家自然科学基金（60772109）项目资助 |
| |
| 摘 要： | 为降低AdHoe网络中实时业务的端到端时延，提出了基于802．11DCF的改进协议。协议采用3种机制降低实时业务的时延：面向路径的连续转发机制将RTS中的转发信息携带在ACK中发送，给实时业务提供较高的接入优先级；标签交换机制使得中间节点可以在MAC层获取转发信息，加快了实时业务数据包的转发速度；重传控制机制减少了无效传输的超时数据包。仿真结果表明，在重负载条件下，改进协议中实时业务的时延比802．11DCF有大幅度的下降，网络吞吐量也有所提高。
|
| 关 键 词： | MAC协议 实时业务 连续转发 标签交换 重传控制 |
A MAC Protocol for Real-time Traffic in Ad Hoc Networks |
| |
| Institution: | WEI Rong, YU Tian-hang, WU Mu-qing( 1. Institute of Communication Networks Integrated Technique, Beijing University of Posts and Telecommunications, Beijing 100876, China 2. Beijing Institute of Tracking and Telecommunication Technology, Beijing 100094, China 3. Beijing Astronauties Control Center, Beijing 100094, China) |
| |
| Abstract: | In order to decrease the end-to-end delay performance of the real-time traffic in Ad Hoc networks, a new MAC protocol based on 802.11 DCF was proposed. Three schemes were adopted in the new protocol： the pathoriented backing tain the consecutive forwarding scheme providing real-time traffic with high priority to access the channel by piggyforwarding forwarding information in RTS on ACK frame; the label switching scheme making the intermediate node obinformation within the MAC layer and accelerating the transmission of the real-time traffic; and the retransmission control scheme decreasing the useless transmission of overtime data frame. Simulation results show that under heavy loads, our protocol can decrease the end-to-end delay remarkably and the network throughput is also improved. |
| |
| Keywords: | MAC protocol Real-time traffic Consecutive forwarding Label switching Retransmission control |
| 本文献已被 维普 等数据库收录！ |
