Advanced Virtual Clock Synchronization in Wireless Sensor Networks

Wireless sensor network works based on the clock synchronization, which need to eliminate hardware-induced drift as well as clock offset. This paper presents an Advanced Virtual Clock Synchronization protocol based on the index approximation.Each node accesses to the network with an unique clock drift and offset, the more difference between the node and the virtual clock, the fast the node adjusts it's drift and offset, thus improve the synchronization efficiency. Simulation data proves that this protocol can effectively improve the synchronization efficiency.