摘要
针对无线AdHoc网络不能区分数据流优先级的问题,提出一种基于802.11DCF退避算法的改进机制,该机制通过减少高优先级数据流的MAC层重传次数,使发送高优先级数据流(如实时数据流)的节点更容易连接信道,高优先级数据流占有更多带宽资源,从而减少传输时延。分析结果表明,该算法能有效提高高优先级数据流的传输性能。
Aiming at the problem that wireless Ad Hoc networks can not provide any priority scheme, this paper proposes a proved mechanism based on 802.11DCF back-off algorithm. The new mechanism, by reducing the retransmission number of high-priority data flows at the data link layer, can make high-priority data flow（such as Real-time data flow） access channel more easily, the high-priority data flow can obtain more bandwidth, and the average end-to-end delay is reduced as well. Analysis results show that the new algorithm can improve the transmission performance of data flows in high priority significantly.
出处
《计算机工程》
CAS
CSCD
北大核心
2009年第21期94-96,100,共4页
Computer Engineering
基金
国家自然科学基金资助项目(60673185)
教育部留学回国人员科研启动基金资助项目(教外司留[2007]1108号)
江苏省"青蓝工程"中青年学术带头人培养对象基金资助项目(苏教师[2007]2号)
