【摘要】 近年来,Ad hoc网络的组播路由协议研究受到广泛关注,其中QoS保障问题是关键技术之一。目前已经提出了许多组播路由协议,其中动态广播环组播路由协议(DRMR),在降低控制开销的基础上,能够取得较好的分组递交率和扩展性。但DRMR没有考虑 QoS 保证要求的问题,本文时DRMR协议进行了QoS保证的扩充,根据多目标约束条件,优化组播路由的选择,提出了一种保证最小带宽要求情况下取得整体优化延时和包丢失率条件的路由方案。最后,利用NS2仿真软件对新的QoS-DRMR协议进行仿真,结果表明:QoS-DRMR协议较好地实现了在多目标约束条件下的组播服务。更多还原

【Abstract】 Recently the research of multicast routing protocols for Ad hoc network has attracted extensive attention.The QoS (Quality of Service)is one of the key technique of Ad hoc network.By far,many multicast routing protocols for Ad hoc have been proposed,including DRMR (Dynamic Ring Based Multicast Routing Protocol for Ad hoc Net- works).DRMR has a high data packet delivery ratio and good scalability,basing on the decreasing of control cost.But DRMR didn’t take account of the QoS.According to the multiple objects inhibiting precondition,the paper presents a routing algorithm which guarantees the minimal bandwidth request and optimizes the delay and the lost rate whole.The new protocol is called QoS-DRMR.It is simulated and evaluated with NS2.The result of simulation shows that QoS- DRMR can improve the multicast service at the multiple objects inhibiting precondition.更多还原