Hybrid Topology Control Based on Clock Synchronization in Wireless Sensor Network

Objectives: The main objective of this work is to lessen energy utilization of Wireless Sensor Network. The Radio Frequency Identification is the protocol of Wireless Sensor Network which provides channel access using TDMA protocol. Due to weak clock synchronization of sensor nodes TDMA protocols do not work efficiently. The improvement will be proposed in Radio Frequency Identification protocol to synchronize clocks of sensor nodes for efficient working of TDMA protocol. Methods: To reduce energy consumption of sensor networks various operation modes are used and these modes are sleep, active and ready mode. The TDMA protocol is used to assign time to sensor nodes for efficient execution of these modes. In the sensor network clocks of the sensor nodes are weakly synchronized due to which packet loss may occur due to which network lifetime get reduced. The proposed improvement and existing Radio Frequency Identification protocol is simulated in NS2 with finite number of sensor nodes on area of 800*800 meter. The LEACH protocol is used for clustering and for Cluster Head selection. Findings: In this paper, improvement is being proposed in Radio Frequency Identification protocol for clock synchronization and proposed improvement in based on time lay technique. In time lay technique base station takes initiative to synchronize clocks of the sensor nodes. It is been analyzed that proposed algorithm performs well in terms of energy consumption, throughput and delay.