Transmission control methods with multihopped envi

Authors: Noriki Uchida Kazuo Takahata Yoshitaka Shibata

Publish Date: 2010/08/18

Volume: 1, Issue: 4, Pages: 249-257

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Abstract

Cognitive wireless network CWN is expected as one of the most efficient transmission methods to solve today’s wireless problems like the lack of wireless bands or the efficient usage of limited wireless resources However CWN have not established effective transmission methods considered with QoS or useroriented transmission methods In this paper selective transmission control method in CWN considering with endtoend QoS based on user policies is proposed First at the observation stage the physical data such as electric field strength bit error rate jitter latency packet error rate and throughput are observed Then at the decision stage analytic hierarchy process AHP with user policy is applied for decision making process with those parameters Finally the action stage one of the suitable links is chosen and changed links and networks Also the route selecting method is proposed based on extended AODV protocols When route changes come to need considerable wireless routes are listed by AODV protocol including network conditions Then the following three methods are used for route selection 1 Route selection so that Maximizing EndtoEnd network conditions among all of the routes 2 Route selection so that applying EndtoEnd AHP selection among all of the routes 3 Route selection so that using minmax methods for the results of the policy based AHP In our simulation ns2 is used for the computational results to the effectiveness of the suggested transmission methods in CWNs The results showed the effectiveness of the proposed methods

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