针对由移动传感器节点组成的移动传感器网络数据转发能耗高、有效性低等问题，提出了基于消息冗余度动态测算的数据机会转发策略。该策略结合节点与sink间位置关系、运动模式、剩余能耗等局部信息构建三维特征向量来描述节点转发消息的能力，并利用预期的消息成功传输到sink的概率和节点当前的机会概率动态调整消息冗余度，使转发消息的机会概率越低转发冗余度越高，反之亦然，以此在提高消息成功传输率的同时控制消息副本数，进而降低网络平均能耗。与直接传输和原路返回机会数据转发相比，新策略传输有效性高、能耗低，更适合移动传感网，符合移动传感网对数据转发策略高有效性、低能耗、延时容忍的要求。%In order to solve the problem of high energy cost and low effectiveness in the mobile sensor network composed of mo-bile sensor nodes,this paper proposed an opportunistic routing strategy,which was based on not only channel quality of the link between a node and sink,but also the movement speed and energy cost of a node synthetically.It created three dimensional fea-ture vectors by the local information mentioned above to describe the ability of nodes forwarding message packages.Furthermore, it adjusted message redundancy dynamically by expected message successful transmission rate and opportunity probability.There-fore less the opportunity probability was more the message redundancy,and vice versa.As a result,successful transmission rate was raised and energy cost was lowered by controlling message redundancy at the same time.Analysis and simulation show that, comparing with direct transmission and opportunistic with backtracking,the new strategy is more suitable for opportunistic net-work which is also a kind of delay tolerant network with higher validity and lower energy cost.
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