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Wireless Mesh Networks performance assessment for confined Areas deployment


Manani Moutairou, Gilles Y. Delisle, Hasnaa Aniss, Michel Misson


Vol. 8  No. 8  pp. 12-23


Complex problems arise in planning network operations, particularly for deployment in an underground environment. Experimentation with Wireless Mesh Networks (WMN) suggests that their capacity can be surprisingly low due to the requirement that nodes forward each others’ packets. The achievable capacity depends on the network size (i.e. number of hops), traffic patterns and detailed local radio interactions. This paper examines the capacity variation using an open source software network traffic generator and real experimental data obtained in an underground mine located in Val-d’Or, Qu?bec, Canada. Our results helps in understanding the limitations of the total bandwidth available for WMN in an underground mine area. The Wireless Access Points are deployed in a complex area such as mine galleries. The performance (maximum throughput) of a WAP (Wireless Access Point) is evaluated; the end to end and peer to peer communication effects on throughput for more than one hop are also analyzed by tuning UDP (User Datagram Protocol) traffic or TCP (Transmission Control Protocol) connection on a wireless Mesh network deployed at 70m below ground level. This environment is typical of an instable propagation environment submitted to multipath effect. This paper shows that a maximum total end to end capacity available in the WNM is roughly 5.8 Mbps and the end to end throughput available to each node is roughly 0(1/2n) with n the total number of hops. Also WMN radio interface’s behaviour and specially the number of hops in mine gallery is analyzed for comparison with it behaviour well known and already well studied in free space.


Radio interface, Throughput, multi-hop, underground topology, TCP