The invention relates to a method based on multi-channel medium
access control protocol in an ad hoc network, which is applicable to temporary
mobile ad hoc network applications with the requirement of transmitting a large amount of data, as long as each device has a Wi-Fi (
wireless-fidelity) network card, the method can be realized. The designed multi-channel medium
access control protocol utilizes three non-overlapped physical channels on 2.4GHz
frequency band for simultaneously performing
data transmission, network time is planned to periodic
beacon frame intervals as a whole, and each period is further subdivided to three sub-intervals which are
synchronous control interval, multi-
channel data transmission interval and
beacon period end interval respectively. The
synchronous control interval is used for transceiving
beacon frames and reserving a channel, an internal node of the multi-
channel data transmission interval is switched to the reserved channel for performing
data transmission, and the internal node of the
beacon period end interval finally stops receiving data of the upper layer and is further switched to a common channel. Practical tests and result analysis show that, compared with the ad hoc network of 802.11 protocol, the multi-channel ad hoc network based on the method can significantly improve the
throughput of the network.