| 一种面向实时业务的Ad Hoc网络MAC协议 |
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| 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]. 南京邮电大学学报(自然科学版), 2008, 28(2): 58-62 |
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| 作者姓名： | 韦蓉 宇天航 武穆清 |
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| 作者单位： | 北京邮电大学 通信网络综合技术研究所,北京 100876;北京跟踪与通信技术研究所,北京,100094;北京航天飞行控制中心,北京,100094;北京邮电大学 通信网络综合技术研究所,北京,100876 |
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| 摘 要： | 为降低Ad Hoc网络中实时业务的端到端时延,提出了基于802.11 DCF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802.11 DCF有大幅度的下降,网络吞吐量也有所提高.
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| 关 键 词： | MAC协议 实时业务 连续转发 标签交换 重传控制 |
| 文章编号： | 1673-5439(2008)02-0058-05 |
| 修稿时间： | 2007-10-10 |
A MAC Protocol for Real-time Traffic in Ad Hoc Networks |
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| WEI Rong,YU Tian-hang,WU Mu-qing. A MAC Protocol for Real-time Traffic in Ad Hoc Networks[J]. JJournal of Nanjing University of Posts and Telecommunications, 2008, 28(2): 58-62 |
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| Authors: | WEI Rong YU Tian-hang WU Mu-qing |
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| Affiliation: | WEI Rong1,2,YU Tian-hang3,WU Mu-qing1 1.Institute of Communication Networks Integrated Technique,Beijing University of Posts , Telecommunications,Beijing 100876,China2.Beijing Institute of Tracking , Telecommunication Technology,Beijing 100094,China3.Beijing Astronautics Control Center,China |
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| 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 path-oriented consecutive forwarding scheme providing real-time traffic with high priority to access the channel by piggybacking forwarding information in RTS on ACK frame;the label switching scheme making the intermediate node obtain the forwarding information within the MAC layer and accelerating the transmi... |
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| Keywords: | MAC protocol Real-time traffic Consecutive forwarding Label switching Retransmission control |
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