延迟容忍传感器网络中基于群组运动的事件传输

提出了一种基于分布式群组移动的事件分类传输策略GMED(distributed group mobility adaptive event delivery).通过有效地发现和利用传感器节点在运动过程中形成的群组,建立基于群组的事件分类传输模型,改善数据传输性能.其中,群组的转发是依据各自与汇聚点的机会概率按照多副本方式进行的；而群内的事件传输则是基于各成员的稳定邻居集建立传输路径,并以单副本方式进行.队列管理则根据事件的优先级决定递交的顺序和丢弃原则.此外,引入冗余副本控制机制,优化副本管理,降低网络负载.模拟实验结果表明,与现有的几种DTMSN(delay tolerant mobile sensor networks)数据传输算法相比,GMED能以较低的数据传输能耗和传输延迟获得较高的数据传输成功率,且网络寿命相对较长.

Group Mobility Adaptive Event Delivery Scheme for Delay Tolerant Mobile Sensor Networks

This paper proposes an efficient event delivery algorithm called distributed group mobility adaptive event delivery(GMED) for delay tolerant mobile sensor networks(DTMSN).GMED is designed to establish a group-based event delivery model by effectively finding and utilizing the groups generated by moving sensor nodes which then lead an improved performance: On one hand,Inter-Group delivery will be achieved by multi-replica delivery based on its delivery probability to the sink.On the other hand,Intra-Group delivery will be performed by single-replica delivery through established transmission paths because each node have stable neighbor sets inside group.Meanwhile,delivery prioritizing will be based on event priority in the queue.Furthermore,a redundant replica control mechanism is also introduced to optimize replica management and network overload.Simulation results have shown that GMED not only achieves a relatively long network lifetime,but also has a higher message delivery ratio at lower transmission overhead and delay than other DTMSN data delivering approaches.