摘要
针对无线adhoc网络不能提供数据流优先级区分的问题,本文提出了一种基于802.11DCF退避算法的改进机制,该机制通过设置不同的MAC层最小竞争窗口来实现数据流的区分服务,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,从而使高优先级数据流占有更多带宽资源。数学分析表明,该策略能有效的提高高优先级数据流的传输性能。
Considering that IEEE 802.11 ad hoc networks can not provide any priority scheme, this paper proposes a new scheme based on the 802.11 DCF back-off algorithm. The algorithm, by setting different number of Minimum Contention Windows at the data link layer, can make high-priority data flow(such as Real-time data flow) access channel more easily. As a result, the high-priority data flow can obtain more bandwidth. Our mathematical analyses demonstrate that the new algorithm improve the transmission performance of data flows in high priority significantly.
作者
吴志强
朱红丽
WU Zhi-qiang, ZHU Hong-li (Henan Polytechnic University, Jiaozuo 454000, China)
出处
《电脑知识与技术》
2008年第12Z期2120-2122,共3页
Computer Knowledge and Technology
