Fault recovery method of wireless sensor network

Abstract

The invention relates to the wireless sensor network technology field and discloses a fault recovery method of a wireless sensor network. In the invention, through a leading relay node (LRN), an isolated area which loses connection is reconnected to a nearest connected set (CS), and then the CSs are connected so as to realize a purpose of recovering network connectivity. Because the LRN in the each isolated area only needs to move to the CS which is nearest to the LRN itself, a shift distance can be substantially shortened and node energy can be saved too. In the invention, according to a density of the LRN, CS division is performed to the whole network and simultaneously, during a connection process of the different CSs, a density approach method is still used to perform the fan-shaped division so that an LRN optimization process between the isolated areas can be simplified and complexity of algorithm can be reduced.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a fault recovery method for wireless sensor networks. Background technique [0002] The fault recovery technology of the current wireless sensor network is mainly based on the fault recovery technology of a single node (referring to the sensor node) and the fault recovery technology based on the block area. The failure recovery technology based on a single node considers that only a single sensor node fails at the same time. The fault recovery technology based on block area refers to the strategy adopted when multiple nodes fail at the same time. [0003] The fault recovery technology based on a single node mainly uses neighbor nodes to replace the faulty node, and takes measures on the faulty node itself. [0004] The Chinese invention patent application with the publication number CN102111789A uses redundant nodes to replace failed nodes. The method includes...

AI Technical Summary

Problems solved by technology

If multiple nodes fail at the same time, it will cause server information congestion

Moreover, when multiple nodes fail, the communication quality on the path from the faulty node to the server cannot be guaranteed, which will cause the server to make a wrong decision.

[0009] (2) The transposition node moves too far, consumes too much energy, and takes too long to recover

[0010] (3) The existing fault recovery technology algorithm is relatively complicated

Both the method and the DORMS algorithm disclosed in the Chinese invention patent application with the publication number CN102111789A need to be optimized, and the recovery process is relatively complicated

In the case of a relatively large scale of actual network nodes, the time for fault recovery is relatively long, and the meaning of fault recovery has been lost

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