484results about How to "Achieve estimates" patented technology

The invention relates to an industrial wireless sensor network clock frequency offset estimation method based on timing response, and belongs to the technical field of wireless sensor networks. In themethod, the node to be synchronized sends a data packet to the reference node; the reference node receives the data packet; a corresponding timing response time is mapped according to the serial number of the data packet, a confirmation message is replied after the time interval, time stamp information does not need to be exchanged between the to-be-synchronized node and the reference node, and after multiple times of communication interaction, the to-be-synchronized node can estimate relative frequency offset and fixed time delay between node clocks. The method is easy to integrate into an industrial wireless sensor network with a time slot mechanism, a message special for time synchronization parameter estimation does not need to be sent and received independently, long-term tracking ofclock frequency offset can be achieved only with low calculation cost, communication expenditure is reduced, and energy consumption is reduced; Meanwhile, time stamps do not need to be interacted among the nodes, so that the safety of time synchronization parameter estimation is improved.