| 摘要: |
| 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. |
| 关键词: 延迟容忍传感器网络 群组运动 机会概率 传输路径 |
| DOI：10.3724/SP.J.1001.2012.03971 |
| 分类号: |
| 基金项目:国家自然科学基金(61003229, 61170256, 61173172, 61103226); 四川省科技支撑计划项目(2009GZ0004); 中央高校基本科研业务费专项资金资助(ZYGX2010J111, ZYGX2010J074, ZYGX2011J102) |
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| Group Mobility Adaptive Event Delivery Scheme for Delay Tolerant Mobile Sensor Networks |
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WU Lei1, WANG Xiao-Min1, LIU Ming1, CHEN Gui-Hai2, GONG Hai-Gang1
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1.School of Computer Science and Engineering, University of Electronic Science and Technology, Chengdu 611731, China;2.State Key Laboratory for Novel Software Technology (Nanjing University), Nanjing 210093, China
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| Abstract: |
| 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. |
| Key words: DTMSN (delay tolerant mobile sensor networks) group mobility opportunistic probability transmission path |
