Wireless sensor network on-demand clock synchronization method based on AODV (Ad Hoc On-Demand Distance Vector) routing protocol

The invention discloses a wireless sensor network on-demand clock synchronization method based on an AODV (Ad Hoc On-Demand Distance Vector) routing protocol. A clock synchronization algorithm is integrated with a path finding algorithm of an AODV protocol, so that clock synchronization with a target node can be implemented according to the demand of the node, and the implementation of the clock synchronization is not limited to a whole-network synchronization way. The clock synchronization algorithm is implemented on the basis of direct interaction of a source node with a target node, and an intermediate node does not participate into clock synchronization computation anymore, so that hop-by-hop accumulation of clock synchronization deviations can be avoided, and the accuracy of multi-hop clock synchronization is increased. Through use of existing clock synchronization information of the intermediate node, further optimization of the communication overhead of the clock synchronization algorithm can be realized; the computation speed of the clock synchronization algorithm can be increased in a network in which a topological structure changes rapidly; and rapid synchronization of the node with the target node is implemented. Therefore, the technology can well adapt to the network in which the topological structure changes rapidly.