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首页> 外文期刊>Mobile computing and communications review >FansyRoute: Adaptive Fan-Out for Variably Intermittent Challenged Networks
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FansyRoute: Adaptive Fan-Out for Variably Intermittent Challenged Networks

机译：FansyRoute：可变间歇性挑战网络的自适应扇出

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摘要

We consider the problem of routing in a highly and variably intermittent wireless network to support delay-intolerant as well as delay tolerant applications. Specifically, the links in such a network are too volatile to maintain a consistent topology, rendering most MANET protocols ineffective. At the same time, store-and-forward (DTN) techniques are not an option due to the need for delay intolerance, and may be unnecessary due to the likely availability of contemporaneous, albeit rapidly changing, paths. We present a novel routing mechanism called FansyRoute, aimed at this challenged region between MANETs and DTNs. FansyRoute adaptively adjusts the number of replications (fan-out) on a per-node basis, taking into account the level of intermittency along the path to the destination and a user-specified tradeoff between delivery expectation and the cost of replication. We study the performance of two FansyRoute schemes on a prime example of such variably intermittently connected networks, namely asyn-chronously duty-cycled sensor networks. Using ns-3, we compare FansyRoute to OLSR, AODV and Flooding. The results show that in an intermittent network, FansyRoute can deliver 50% more packets than the single path protocols, with less than 5% of the replication incurred by flooding. FansyRoute replicates only when needed and the replication is restricted to the challenged regions of the network.
机译：我们考虑在高度可变的间歇性无线网络中路由以支持延迟不容忍和延迟容忍应用的问题。具体地说，这种网络中的链路太不稳定，无法维护一致的拓扑，从而使大多数MANET协议无效。同时，由于对延迟的不耐性的需求，存储和转发（DTN）技术不是一种选择，并且由于可能同时使用（尽管快速变化）路径，因此可能不必要。我们提出了一种新颖的路由机制，称为FansyRoute，针对MANET和DTN之间的这一受挑战的区域。 FansyRoute会考虑到目的地的路径上的间歇性水平以及交付预期和复制成本之间的用户指定折衷，从而在每个节点的基础上自适应地调整复制（扇出）的数量。我们以这种可变间歇连接的网络（即异步占空比传感器网络）的典型示例研究了两种FansyRoute方案的性能。使用ns-3，我们将FansyRoute与OLSR，AODV和Flooding进行了比较。结果表明，在间歇性网络中，FansyRoute可以传送的数据包比单路径协议多50％，而泛洪导致的复制量却不到5％。 FansyRoute仅在需要时进行复制，并且复制仅限于网络的受挑战区域。

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