候选节点间协同时延最优的机会路由

摘要

To minimize the coordination delay between the forwards in the framework of opportunistic forwarding, an expected end-to-end coordination delay (ECD) was got through mechanism modeling of the process of forwarding according to the characteristics of broadcast and coordination.An opportunistic routing based on the expected end-to-end coordination delay (ECDOR) was proposed using ECD as an expected cost.Results of simulation show that the coordination delay between the forwards is the major factor, affecting the average end-to-end delay in dense network.ECDOR has better network performance than the classic opportunistic routing and unicast routing in terms of the network throughput and the average end-to-end delay.%为最小化机会转发框架下候选节点间的协同时延,根据机会路由的广播与协调特性,对候选节点协同转发过程进行机理建模,得到节点的期望端到端协同时延(ECD).将节点ECD值作为路由测度,提出一种基于候选节点期望端到端协同时延的机会路由(ECDOR).仿真结果表明,在网络密集情形下,候选节点间协同时延成为影响端到端平均时延的主要因素,该情形下ECDOR在网络吞吐量与端到端平均时延方面取得了优于经典机会路由与单播路由的网络性能.