Transmission control methods with multihopped environments in cognitive wireless networks
Cognitive wireless network (CWN) is expected as one of the most efficient transmission methods to solve todays 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 user-oriented transmission methods. In this paper, selective transmission control method in CWN considering with end-to-end 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 End-to-End network conditions among all of the routes. (2) Route selection so that applying End-to-End AHP selection among all of the routes. (3) Route selection so that using min-max 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.
cognitive wireless network qos ahp extended aodv