Mobile Adhoc & Sensor Networks

Question: Discuss about theMobile Adhoc Sensor Networks. Answer: Introduction MAC layer had to undergo some energy problems because the node transceiver had been consuming a significant portion of energy. Collisions, overhearing protocol overhead, and idle listening are some of the problems of the MAC layer for completing the operations. The design goals of MAC protocol is made to deal with these issues and reduce the consumption of energy. RTS (or Request To Send) and CTS (or Clear To Send) are optional processes/mechanism that is widely used in 802.11 wireless networking protocols for reducing the frame of collisions. The frame of collision has been introduced by the problem of hidden mode. The RTS/CTS also helps in fixing the problem of exposed node and the modern RTS/CTS are built with ACKs. The problem of idle listening can be sorted out by using the STEM or sparse topology and energy management protocol in MAC. The STEM protocol targets the networks deployed for waiting and it reports the behavior of certain events. STEM attempts to remove the idle listening in the monitoring state and it results in faster transition of the monitor state to transfer state. The medication device protocol in MAC has been helpful for establishing peer to peer communication in the network. The protocol is compatible with the communication mode of IEEE 802.15.4 low rate WPAN standard and it allows the transmission of each node into periodic sleep mode. The nodes woke up at the time of receiving data packets from the neighbor nodes. References Karl, H. and Willig, A., 2007.Protocols and architectures for wireless sensor networks. John Wiley Sons.