Design of Time Synchronization Protocol based on Master-Slave Topology for Heterogeneous USN
Yong-Wan Ju, Woojin Paik, Moon-Sun Shin · International Journal of Multimedia and Ubiquitous Engineering · 2014
In this paper, we propose a specific time synchronization protocol called MSTSP (Master Slave Time Synchronization Protocol).We designed MSTSP based on the master-slave topology in order to synchronize the time of the heterogeneous sensor nodes.Heterogeneous sensor networks can be used in various risk-associated areas.Time synchronization among the heterogeneous sensor nodes is essential in Ubiquitous Sensor Network systems.In MSTSP, the time-sync master nodes can always be synchronized with the Sink Node of USN, because the sensor nodes which are homogeneous with the Sink Node become time-sync master nodes.And other sensor nodes which differ from the Sink Node must be time-sync slave nodes, which need to belong to one of the specific master nodes.The time-sync master nodes then enable time-sync slave nodes to be synchronized with the sleep periods.The proposed MSTSP is also useful for power saving by maintaining maximum sleep time.