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The Research On Key Technologies Of QoS In WMNs

Posted on:2011-08-22Degree:MasterType:Thesis
Country:ChinaCandidate:H B ZhongFull Text:PDF
GTID:2178360305494730Subject:Computer Science and Technology
Abstract/Summary:PDF Full Text Request
Wireless mesh networks need to support various traffics, and the transmission performance requirement such as bandwidth and delay of these traffics are different. Existing research and experiments show that, the wireless mesh network based on IEEE 802.11 standards can not properly distinguish the provision of services, it is difficult to provide quality of service to that have strict requirements. Analysis of Hybrid Wireless Mesh online business in the transmission performance for different types of businesses to provide the appropriate quality of service guarantee, will have important research value. The main work and contributions are presented in the following aspects:Setting up the wireless mesh network testbed, then test and analysis the performance of the network, Secondly, through analyzing and comparing various multi-path routing protocols for WMN, we propose a Multi-channel Multipath Routing Protocol based on Multiple description coding.In order to guarantee the QoS for Wireless Mesh network, to calculate the QoS performance bounds is needed. In this paper, A business model about multi-hop wireless network is established Based on statistical traffic envelopes, and then the node's statistical delay bound,the statistical End-To-End delay bound and the statistical End-To-End backlog bound are derived using statistical network calculus theory. All simulated results for different data flows are bounded by theoretical results, These show the QoS performance bounds model for Wireless Multi-hop network perform well.A multi-services resource scheduling algorithm which guarantee the demand of QoS is proposed with the using of QoS monitoring mechanism, It consider both the delay priority and throughput priority during the service scheduling period, then it guarantee the transmission time delay during the resource allocation period, simulation results showed that the new algorithm is superior to the existing scheduling algorithms in the level of delay and throughput.
Keywords/Search Tags:Wireless Mesh Networks, multi-path, Quality of Service, Network calculus, Resource scheduling
PDF Full Text Request
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