Multichannel MAC Protocol for AdHoc Wireless Networks

In the regular Ad-Hoc or Infrastructures wireless LANs a single channel shared among nodes in the networks. Once the number of nodes in the system increases it causes the performance of the overall system to decrease. In this paper proposes a medium access control (MAC) protocol for ad hoc wireless networks (MMAC) that uses multiple channels.We can improve throughput with multiple channels because multiple transmissions can take place simultaneously without interfering each other. This proposed protocol uses N channel where N is independent of the number of nodes in the network. We modify IEEE 802.11 DCF protocol to enable hosts to utilize multiple channels by switching channels dynamically. Our scheme requires only one transceiver for each host. The main idea is to negotiate and select channels during the ATIM windows as in power saving mechanism (PSM). And switch to reserved channel to send data in DATA windows