under the guidance of Prof. Bhaskaran Raman

WiFi mesh networks with long distance outdoor links have become an attractive option to provide lowcost network connectivity to rural areas, especially in developing regions. Vari-ous studies shows severe drop in 802.11 performance on long distance links;primary reason being failure of carrier sensing. It is also well understood that a TDMA-based approach is necessary to provide good performance over such networks. While preliminary prototypes of TDMA-based MAC protocols have been developed, there is no implementation-based validation/evaluation in multi-hop settings. In this work we present the implementation and evaluation of WiFi-based multihop TDMA system using off-the-shelf hardware and open-source drivers. To our knowledge there is no working implementation of such system complete with multihop schedule dissemina-tion and time synchronization. In our implementation, we carefully account for the various overheads such as the synchronization error, guard time, header overheads, etc. Through detailed evaluation we show that the achieved throughput is close to what we expect the-oretically. And the delay/jitter values are small even over multiple hops and good enoug