摘要
提出了一种基于实时流的无线自组网服务质量(QoS)路由协议,其核心思想是载波侦听范围内的节点间通过交换实时流的带宽消耗和本地可用带宽信息,估计出节点的邻居可用带宽,根据此带宽进行路由发现和新实时流的接纳控制,并根据实时流的带宽要求预留资源。对每个实时流分别建立一条路由,避免相同源和目的的实时流之间的竞争,有利于负载均衡。模拟实验表明,这种基于实时流的 OoS 路由协议能够为实时应用提供更好的 QoS 保障。
A realtime-flow-based QoS routing protocol is proposed in wireless ad hoc networks. The key idea of it is to estimate its neighbor available bandwidth through exchanging the information about consumed bandwidth of realtime flows and its local available bandwidth with the other nodes which are located in the node＇ s wireless carrier sensing area, execute route discovery and admission control for a new realtime flow based on a node＇ s neighbor available bandwidth, and reserve resource based on the required bandwidth of the realtime flow. Constructing a route for each realtime flow favors avoiding the contention among the reahime flows which have the same source and destination address, which makes network load achieve load balance. Simulation shows that the proposed realtime-flow-based QoS routing protocol can provide better QoS guarantee for realtime applications.
出处
《高技术通讯》
CAS
CSCD
北大核心
2008年第2期126-131,共6页
Chinese High Technology Letters
基金
863计划(2002AA142020)
国家自然科学基金(60475012)资助项目
关键词
无线自组网
带宽估计
QOS路由
接纳控制
资源预留
wireless ad hoc networks, bandwidth estimation, QoS routing, admission control, resource reserve
