Abstract: An opportunistic routing strategy was proposed based on the analyses of the channel quality, the movement speed and energy cost of a node synthetically. The received signal strength indicator was used to build opportunity probability. And then, the movement speed was used to reflect the node mobility. At last, the energy cost was used to express node residual life. The opportunistic routing was built by them and the preferred number of a candidate node was defined in order to determine its listening forwarding time. Furthermore the problem of package retransmission was solved. The analysis and simulation show that, compared with Extremely Opportunistic Routing (ExOR) and Opportunistic with Backtracking (OB), the new strategy is more suitable for opportunistic network with higher validity and lower energy cost.

Key words: mobile wireless sensor network, delay tolerant network, opportunistic routing, Received Signal Strength Indicator (RSSI), movement speed, energy cost

摘要： 在考虑节点信道质量、移动方向和速率、剩余能耗等本地信息的基础上，在移动传感网中提出了基于本地信息的机会路由策略(ORLI)。该策略采用能在一定程度上反映信道质量的接收信号强度指示值对数常态分布模型建立节点机会概率值；引入移动速率和方向反映节点的移动性；使用节点的剩余能耗反映节点的剩余使用寿命，实现机会路由，并通过候选节点的优选序号来确定候选点的侦听转发时间以避免报文重发。与机会路由策略ExOR和OB比，新策略更适合移动传感网，具有传输有效性高、能耗低等优点。

关键词: 移动传感网, 延时容忍网络, 机会路由, 信号接收强度指示值, 移动速度, 能耗