A Low-Cost MIMO Mesh Testbed Based on 802.11n
In this paper, the authors present a configurable and inexpensive MIMO mesh network research platform based on IEEE 802.11n and open source software. There are two requirements for such a research test-bed. First configurability: the researcher needs the ability to modify hard- and software on each ISO/OSI layer. Secondly, the test-bed has to comprise hundreds of nodes to make sound conclusions on network performance. Therefore, a single mesh node has to be cheap. Both requirements have contradicting implications and a tradeoff is necessary. They propose a solution based on off-the-shelf 802.11n hardware with Atheros WiFi chips, the open source WiFi driver ath9k, and the Click Router API.