摘要
一些多媒体应用要求无线Mesh网络提供带宽、时延等实时性服务。基于多路径在平衡网络负载等方面的优点,相对单一路径可以更好地提供QoS支持,文中对节点不相交路由协议NDMR提出了相应的改进方案,在RREQ分组和RREP分组中添加带宽和时延字段,然后设定一种比值的选择机制,使源节点选择的传输路径能够更好地满足QoS需求。仿真表明,所作的改进有效地降低了数据传输延迟和路由负载,提高了分组投递率。在多径路由的基础上,通过提供QoS约束机制,可以有效满足所需的网络性能。
Some multimedia applications require wireless mesh networks（WMN） to provide bandwidth, delay and other real-time services. It puts forward the corresponding improvement program for the node-disjoint muting protocol NDMR. By introducing the band- width and delay parameters to RREQ and RREP packets and setting a new path selection mechanism, the transmission path a source node selects can meet the QoS. Simulation results show that the improvements not only reduce data transmission delay and muting load but also promote the packet delivery rate. Through QoS constraint mechanism,meet the network performance required effectively based on multipath muting.
出处
《计算机技术与发展》
2011年第11期61-64,68,共5页
Computer Technology and Development
基金
安徽省高校自然科学基金项目(KJ2008B095)
