Gateway selection in hybrid wireless networks through cooperative probing
Gateway selection in hybrid wireless networks through cooperative probing
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发表时间：
2013-05
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通讯作者：
B. J. Ko;Sisi Liu;M. Zafer;Starsky H. Y. Wong;Kang-Won Lee
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作者：
B. J. Ko;Sisi Liu;M. Zafer;Starsky H. Y. Wong;Kang-Won Lee
在混合无线网络(HWN)中，利用固定蜂窝网络基础设施为移动自组织网络中的节点提供增强的网络覆盖和通信性能，需要基于每个移动节点感知的准确和及时的网络性能来为每个节点选择通往外部网络的网关。然而，由每个单独的节点持续监视这些性能指标将导致高得令人望而却步的通信和处理开销。在本文中，我们提出了一种分布式网络探测机制，称为COPST，它利用节点之间的协作来测量MANET中指向HWN网关的路径性能。在我们的方法中，每个节点利用其他节点测量的端到端性能探测结果，以完全分布式的方式向网关估计自己的性能。此外，分布式进程不需要明确的结构和节点之间的协调，这使其非常适合高度动态的网络环境。通过分析和实验评估相结合的方法，我们证明了我们的协作探测机制能够为HWN中的网关选择提供准确和高效的路径性能结果。
In hybrid wireless networks (HWNs), where the fixed cellular network infrastructure is utilized to provide enhanced network coverage and communication performance for nodes in mobile ad-hoc networks, the selection of the gateway for each node towards the external network needs to be based on accurate and timely network performance perceived by each mobile node. Continuously monitoring these performance metrics by each individual node, however, would incur prohibitively high communication and processing overhead. In this paper, we propose a distributed network probing mechanism, called CoPing, that utilizes the cooperation among the nodes in the measurement process of path performance in MANETs towards the gateways of HWNs. In our approach, each node makes use of the end-to-end performance probing results measured by other nodes to estimate its own performance to the gateways in a fully distributed manner. Furthermore, the distributed process does not require explicit structure and coordination between the nodes, making it ideal for highly dynamic networking environments. Through the combination of analysis and experimental evaluation, we show our cooperative probing mechanism can achieve accurate and efficient path performance results for gateway selection in HWNs.