摘要
移动Ad Hoc网络(MANET)支持QoS保证的能力,受限于无线介质的带宽和节点的移动特性。由于节点的移动,网络拓朴频繁发生变化,一旦节点移动,当前的路由就很容易失效,从而造成通讯中断,这种情况就是链路失效。QoS路由是MANET获得端到端QoS保证的第1步。然而,拓朴变化造成的链路失效状况的存在,使得路由的可靠性对于QoS路由而言非常重要。为使链路失效造成的影响最小,找到生存时间长并且可靠性高的路由就显得尤为重要。提出了一种在MANET中支持QoS路由,并能较好解决链路失效状况的方案。该方案定义了一种新机制,在执行时类似表驱路由协议,通过利用主路径上被共享的邻居节点信息,为主路径上各个独立的子路径预备了可替换的路径。
The ability of Mobile Ad Hoc Networks to support QoS guarantees is constrained by the scarce bandwidth of the wireless medium and the free node mobility. Because of node mobility, the network topology changes frequently, moreover once nodes move, the current route is no longer valid and this causes a communication interruption called a link failure. QoS routing is the first step toward achieving end-to-end QoS guarantees in MANET. However, topological changes cause frequent route breakage and therefore routing reliability becomes a very important requirement for QoS routing. To minimize route breakage, it is important to find reliable routes that exhibit long lifetimes. An approach was prposed cope was proposed the link failure to support QoS routing in MANET. The approach defines a mechanism acting as a proactive routing protocol. By utilizing information about neighbors shared along the main routing path, the mechanism prepares a ready-to-used alternative route for an individual link in the main route.
出处
《计算机工程与设计》
CSCD
北大核心
2005年第8期2051-2053,共3页
Computer Engineering and Design
基金
重庆市教委科学技术研究基金项目(040511)
