A survey of dynamic duty cycle scheduling scheme at media access control layer for energy conservation

Abstract

From the last few years, wireless sensor network (WSN) s have gained increasing attention from both researcher and actual users. The sensor nodes are generally battery powered. The critical aspects of sensor nodes are to reduce the energy consumption of the nodes, so that the network lifetime can extended to reasonable time. WSN need to provide better performance by reducing the sleep latency, while balancing energy consumption among the sensor nodes. The duty cycle media access control (MAC) scheme have been proposed in WSNs mainly to reduce energy consumption of sensor nodes. There are many scheme developed to reduce the energy consumption to increase the life time of the sensor networks. The scheme Dynamic Duty-cycle and Dynamic schedule assignment (DDDSA) reduced the number of RTS and CTS packet by dynamically updating duty cycle value to achieve energy efficiency .The scheme duty-cycle scheduling based on residual (DSR) energy reduced the sleep latency while balancing energy consumption among sensor nodes. Another scheme is duty-cycle scheduling based on prospective (DSP) increase in residual energy to increase the residual energy of nodes using harvesting and DSR. DSP reduce sensor nodes duty cycle to increase the lifetime of the network through harvesting technique