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

Abstract

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.

Description

technical field [0001] The invention relates to the fields of monitoring technology and communication technology, in particular to an on-demand clock synchronization method for a wireless sensor network based on the AODV routing protocol. Background technique [0002] Wireless sensor network is a distributed autonomous network system formed by a large number of sensor nodes randomly arranged in the monitoring area through short-distance wireless communication. Nodes cooperate with each other to complete the perception, collection, transmission and other specific tasks of physical information. Through equipment such as base stations, wireless sensor networks can also be connected to existing networks such as the Internet and mobile communication networks to realize remote monitoring of physical targets. The wireless sensor network from networking to configuration, management and operation is completed by the cooperation of sensor nodes, which basically does not require human...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide an on-demand clock synchronization method for wireless sensor networks based on the AODV routing protocol, which can solve the problem that the data collected by each node in the monitoring task has a large deviation in the time stamp, and avoid nodes in the wireless sensor network. The unnecessary synchronization process between clock synchronization processes reduces the communication overhead of the clock synchronization process and improves the performance of the network.

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