A Token-Based MAC For Long-Distance IEEE802.11 Point-To-Point Links


WiFi-based Long Distance (WiLD) networks have emerged as a promising alternative approach for Internet in rural areas. However, theMAC layer, which is based on the IEEE802.11 standard, comprises contiguous stations in a cell and is spatially restricted to a few hundred meters at most. In this work, we summarize efforts by different researchers to use IEEE802.11 over long-distances. In addition, we introduce WiLDToken, our solution to optimizing the throughput and fairness and reducing the delay onWiLD links. Compared to previous alternative MAC layers protocols for WiLD, our focus is on optimizing a single link in a multi-radio multi-channel mesh. We implement our protocol in the ns-3 network simulator and show thatWiLDToken is superior to an adapted version of the Distributed Coordination Function (DCF) for different link distances. We find that the throughput on a single link is close to the physical data-rate without a major decrease over longer distances.

Mobilkommunikation - Technologien und Anwendungen. Vorträge der 21. ITG-Fachtagung, 11.-12. Mai 2016 in Osnabrück. ITG-Fachbericht