An analysis of performances of multi channel routing protocol based on different link quality metrics

In this paper performances of the Multi Channel Routing (MCR) protocol are analyzed. This is a protocol for multi-channel multi-interface wireless mesh network (WMN), so it must have a certain channel switching algorithm. The main goal of the routing protocol in WMN is to achieve the best possible quality and efficiency of data transmission between the nodes in the network. Because of that, different parameters have to be included in the calculation of link cost (link metric). In the paper different link metrics which MCR routing protocol could use are described and compared, taking into account throughput and delay through the mesh network. These metrics are: ETX (Expected Transmission Count), ETT (Expected Transmission Time), MIC (Metric of Interference and Channel swhiching and WCETT (Weighted Cumulative ETT) metric. In addition, to get as real results as possible, link quality between two nodes was calculated using the indoor propagation model. Simulation results are obtained from the practical implementation of MCR routing protocol, for each of these metrics and real indoor propagation model in Glomosim simulator.