R-MAC Schedule Protocol for Improving Performance of Wireless Sensor Network

Various MAC protocols with different objectives were proposed for wireless sensor networks. MAC protocols employ identical schedules for both unicast and broadcast packet transmissions, and modify their “unicast schedule” to work with broadcast packets. Unlike other wireless networks, it is generally hard to charge/replace the exhausted battery, which gives way to the primary objective of maximizing node/network lifetime, leaving the other performance metrics as secondary objectives. Since the communication of sensor nodes will be more energy-consuming than their computation, it is a primary concern that the communication is minimized while achieving the desired network operation. The MAC schedule should be chosen to maximize the life of the network, which includes reducing contention. MAC schedule to node and network conditions to improve performance under a wide range of conditions and for both unicast and broadcast packets the “transmit / receive schedule” to synchronize nodes on a slowly changing path so that throughput and delay are further reduced, at no cost of overhead in most cases. the transmit / receive schedule to automatically synchronize the nodes can reduce packet delivery delays, providing an efficiency and throughput will increases. The Route-MAC (R-MAC). The purpose of this paper is to study the needs for more life of sensor nodes handling, in the above mentioned situations of WSN, by exploring the usage of mobile sensor nodes that cooperate with the static nodes. This cooperation ncease the life of nodes needs as to maintain the network functionality. R-MAC attempts to pick the MAC schedule that yields the best operating points by adapting the MAC schedule, based on a look-up table. Thus, this research work must populate this adaptation table and find the appropriate switching thresholds. As discussed next, this research work begin this evaluation with the simulation of an analytical model, and verify it with a Matlab implementation. KeywordsWireless sensor networks (WSNs), Transmit, Receive Schedule, MAC Schedule , Efficiency and Throughput, IEEE 802.11, unicast and broadcast packet, network.