网络内聚合的动态方法
Dynamic Approaches to In-Network Aggregation
摘要:
小规模无线设备之间的协作取决于它们推断多个附近节点之间共享的属性的能力。特别是无线移动设备创建一个高度动态的环境,不利于分布式推理这样的全球属性。本文解决了这个问题的一个具体实例:分布式聚合。我们提出了扩展现有的非结构化聚合协议,使高度动态环境中的计数,总和和平均聚合的估计。通过修改后的协议,仅具有有限连接的设备可以保持对聚合的估计,而不管\textit{unexpected}对等体离开和到达。我们对这些聚合维护扩展的分析表明,尽管节点移动性很高,但它们在非结构化环境中仍然有效。
英文摘要:
Collaboration between small-scale wireless devices hinges on their ability to infer properties shared across multiple nearby nodes. Wireless-enabled mobile devices in particular create a highly dynamic environment not conducive to distributed reasoning about such global properties. This paper addresses a specific instance of this problem: distributed aggregation. We present extensions to existing unstructured aggregation protocols that enable estimation of count, sum, and average aggregates in highly dynamic environments. With the modified protocols, devices with only limited connectivity can maintain estimates of the aggregate, despite \textit{unexpected} peer departures and arrivals. Our analysis of these aggregate maintenance extensions demonstrates their effectiveness in unstructured environments despite high levels of node mobility.
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