Never Die Network Extended with Cognitive Wireless Network for Disaster Information System

Noriki Uchida, Kazuo Takahata, Y. Shibata, N. Shiratori
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引用次数: 25

Abstract

In the actual disaster case, there is a certain possibility that electric power line is damaged and power energy cannot be supplied to those communication network devices, and eventually those wireless LANs cannot be functioned. Although mobile wireless network is easy to reconstruct than wired network, there may be the case that network disconnection is not affordable after disaster. That is, Disaster Information System needs a robust Never Die Network (NDN) which will be unaffected by any changes in environment after severe disaster. Satellite Network System is one of possible solution for such a severe disaster, but it has some problems like low throughput, large latency, high cost, and so on. On the other hands, single wireless communication like IEEE802.11a/b/g also have some problems like a possible transmission distance, throughput limitation for maintaining QoS for urgent user's situations. Therefore, NDN needs to consider about additional functions for these problems of Satellite and Wireless Network System. In this paper, we introduce Satellite System for optimal transmission control method in Cognitive Wireless Network in order to consider with severe disaster. First, as our previous study, proper wireless link and route selection is held by Extend AHP and Extend AODV with Min-Max AHP value methods for optimal transmission control in Cognitive Wireless Network. Then, check-alive function, alternate data transmission function, possible alternative route suggestion, and network reconfiguration are introduced to our proposed Disaster Information Network by using Satellite System. In the simulation, ns2 are used for the computational results to the effectiveness of the suggested transmission methods in the hybrid system of cognitive wireless and satellite network system.
基于认知无线网络扩展的永不死网络灾害信息系统
在实际灾害情况下,有一定的可能导致电力线被损坏,无法向通信网络设备供电,最终导致无线局域网无法正常工作。虽然移动无线网络比有线网络更容易重建,但可能会出现灾后断网的情况。也就是说,灾害信息系统需要一个强大的永不消亡网络(NDN),该网络在发生严重灾害后不受任何环境变化的影响。卫星网络系统是解决这种严重灾难的可能方案之一,但它存在吞吐量低、时延大、成本高等问题。另一方面,像IEEE802.11a/b/g这样的单一无线通信也存在一些问题,如可能的传输距离,吞吐量限制,以保持紧急用户情况下的QoS。因此,NDN需要考虑卫星和无线网络系统的这些问题的附加功能。本文介绍了认知无线网络中卫星系统的最优传输控制方法,以考虑严重的灾害情况。首先,正如我们之前的研究,在认知无线网络的最优传输控制中,采用扩展AHP和扩展AODV最小-最大AHP值方法进行适当的无线链路和路由选择。在此基础上,提出了基于卫星系统的灾害信息网的检活功能、备选数据传输功能、可能的备选路由建议和网络重构功能。在仿真中,采用ns2对所提出的传输方法在认知无线与卫星网络混合系统中的有效性进行了计算。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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