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Research on the Key Technologies of Emergency Communication Systems Backbone with 802.11n

Author: ZuoShaoFeng
Tutor: JiangXinHua
School: Central South University
Course: Information and Communication Engineering
Keywords: Emergency Communications 802.11n Wireless Mesh Networks Multi-hop transmission Multihop attenuation
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 81
Quote: 0
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Abstract


Form of a variety of terrain , along with the high incidence of geological disasters. In geological disaster rescue scene , often need to keep abreast of site information . Therefore, a network can quickly use the site information to pass out . First , this paper proposes an approach based on 802.11n technology and wireless Mesh network networking solution for emergency communications network , and 802.11n protocol data send / receive process and its MIMO channel model for a systematic analysis , on the basis of Matlab-based conducted in-depth simulation analysis, design and validate an optimized data transmission scheme ; then , this paper discusses the emergency communications network backbone link networking model to study the case in multi-hop backbone link bandwidth requirements , analyzes the impact of multi-hop attenuation of the main factors , and summarizes the rapid emergency communications network environment and network monitoring technology ; Finally, this paper based on embedded system set up emergency communications network test bed , the conclusions of the above theoretical analysis carried out series of experiments , experimental results show that : Based on the 802.11n protocol for emergency communications network backbone links can provide 140Mbps reference bandwidth , and in August reached even after jumping more than 75Mbps bandwidth ; speed 60Mbps in the noisy environments next , after 8 hop is still greater than the transmission bandwidth of 55Mbps, the average bandwidth of each hop attenuation of less than 2% . In addition , experimental studies also found that: in this development platform used , CPU processing capability packet switching hardware performance has no attenuation is caused by the main multi-hop wireless channel but relatively greater interference factors .

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