Due to using the simplified interference model, IEEE 802.11 MAC protocol introduces the hidden and exposed terminal problems which significantly decrease the performance of ad hoc wireless networks. In this paper, we propose a novel Interference Graph based MAC protocol (IG-MAC) to improve the throughput of ad hoc wireless networks. The key point is to model the interference information by means of Interference Graph and send busy tone with encoded communication information to prevent the potentially interfering nodes from initiating new transmissions. Through the simulation, our protocol can solve the above two problems caused by 802.11 and improve the network performance substantially.
['Weiming Lin', 'Chongqing Zhang', 'Minglu Li', 'Min-You Wu']
An Interference Graph Based MAC Protocol for Ad Hoc Wireless Networks