Wireless sensor network time synchronization method based on reverse timestamp information

The invention belongs to the technical field of wireless sensor networks, and particularly relates to a wireless sensor network time synchronization method based on reverse timestamp information, which comprises the following steps of: 1, deploying wireless sensor network nodes according to the distribution characteristics of a scene, and adding a certain number of reference nodes in the network; step 2, performing time synchronization on reference nodes in the network through a dual-node time synchronization algorithm; and step 3, the reference node sends an information packet to the subordinate slave node within the range at a certain time interval in a mode of broadcasting the information packet, and the slave node receives the information packet and records the timestamp information of the slave node. By introducing the reference nodes, the problems of large error and long synchronization time caused by multiple hops in the time synchronization process in the high-density wireless sensor network are solve