Simultaneous clock synchronization in double broadcast domain of WSN

In order to reduce the energy requirement in wireless sensor networks, an energy-efficient multihop broadcast synchronization algorithm simultaneously operated in double broadcast domain is proposed. The algorithm is based on receiver-receiver synchronization (RRS). Node synchronization range is expanded to two broadcast domains by peer-to-peer broadcasting message in a pair of synchronized nodes which need to broadcast message one more time. Then, building a hierarchical structure with two root nodes, the algorithm is extended to the network-wide. Simulation results show that the proposed algorithm requires much less timing messages, then lower energy-consumption for network-wide synchronization then other well-known algorithms.