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Comparison of ETX and HOP count metrics using Glomosim simulator

Routing protocols for wireless mesh networks (WMN) are traditionally focused on finding paths with the minimum hop count. In WMN the main goal is to achieve as the best possible quality and efficiency of data transmission between source and destination nodes as possible. To achieve such transmission, different parameters (power consumption, packet loss, delay, etc.) influencing data transmission need to be optimized. A routing algorithm should select better paths by taking the quality of wireless links into account. In this paper performances of two routing algorithms ETX (expected transmission count) and HOP count metric are analized and compared. Simulation results are obtained from practical implementation of ETX metric in Glomosim simulator.