标题: | 使用Mobile Mule对孤立的无线感测网路进行资料收集 Using Mobile Mules for Data Collection in an Isolated Wireless Sensor Network |
作者: | 赖婉婷 曾煜棋 网路工程研究所 |
关键字: | 无线感测网路;Wireless Sensor Network;Mobile Mules |
公开日期: | 2007 |
摘要: | 我的论文研究考虑一个 Isolated Wireless Sensor Network的情况下,当一个感测网路与外界不能连通时,因为每个感测器测节点的记忆体是有限的,如何做到有效率的资料储存管理。将整个网路的记忆体空间想成是一个分散式的储存系统,网路上有行动式收集装置mule来特定的sink点收集资料,我们探讨下列三个问题:(1) 如何降低因为记忆体不足而产生的封包流失,(2) 当丢弃封包的情况无法避免,如何避免高重要性的封包被丢弃掉,(3) 因为空间或时间的限制,mule不能一次收集到全部的资料时,如何将高重要性的封包储存在靠近sink的地方,使得mule可以先收集较重要的资料。我们提出一个DSMS的协定来解决上述的问题。DSMS是一套分散式的演算法,它使用类似于heap sort的封包交换方式,透过与邻居间交换封包来达到我们的目标。透过实作以及模拟来证明DSMS的效用。 This paper considers storage management in an isolated WSN, under the constraint that the storage space per node is limited. The memory spaces of these sensor nodes can be regarded as a distributed storage system. Assuming that there is a sink in the WSN that will be visited by mobile mules, we address three issues: (1) how to buffer sensory data to reduce data loss due to shortage of storage spaces, (2) if dropping of data is inevitable, how to avoid higher priority data from being dropped, and (3) how to keep higher priority data closer to the sink, such that the mobile mules can download more important data first when the downloading time or mule storage is limited. We propose a Distributed Storage Management Strategy (DSMS) based on a novel shuffling mechanism similar to heap sort. It allows nodes to exchange sensory data with neighbors based on only local information. To the best of our knowledge, this is the first work addressing distributed prioritized storaging for isolated WSNs |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT009556510 http://hdl.handle.net/11536/39606 |
显示于类别: | Thesis |
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