Broadcast scheduling and link scheduling in IH-MAC for wireless sensor networks

An intelligent hybrid medium access control (IH-MAC), a novel low power with minimal packet delay medium access control protocol for wireless sensor networks (WSNs). The IH-MAC achieves high energy efficient under wide range of traffic load. It ensures high channel utilization during high traffic load without compromising energy efficiency. IH-MAC does it by using the strength of CSMA and TDMA approach with intelligence. The novel idea behind the IH-MAC is that, it uses both the broadcast scheduling and link scheduling. Depending on the network loads the IH-MAC protocol dynamically switches from broadcast scheduling to link scheduling and vice-versa in order to achieve better efficiency. Furthermore, IH-MAC uses Request-To-Send (RTS), Clear-To-Send (CTS) handshakes with methods for adapting the transmit power to the minimum level necessary to reach the intended neighbor with a given BER target or packet loss probability. Thus IH-MAC reduces energy consumption by suitably varying the transmit power. IH-MAC achieves high energy potency below wide selection of traffic load. It ensures high channel utilization throughout high traffic load while not compromising energy potency. The novel plan behind the IH-MAC is that, it uses each the published programming and link programming betting on the network hundreds the IH-MAC protocol dynamically switches from broadcast programming to link programming and vice-versa so as to attain higher potency. So IH-MAC reduces energy consumption by befittingly variable the transmit power.