A communication method for network-wide time synchronization of dormant wireless sensor networks

Abstract

The invention discloses a communication method for time synchronization of a whole network of a dormant wireless sensing network. The communication method for the time synchronization of the whole network of the dormant wireless sensing network includes following four steps: step 1, generating a temporary root node on the whole network; step 2, maintaining time synchronization of nodes in the network and nodes which are newly added in the network after the temporary root node is generated; step 3, confirming start time of a work period through whole network comparison; step 4, maintaining the time synchronization of the nodes of the whole network in the work period. The communication method for the time synchronization of the whole network of the dormant wireless sensing network is strong in robustness, and only consumes a small number of storage resources.

Description

technical field [0001] The invention relates to a communication method for time synchronization of a long-deployed dormant wireless sensor network in the whole network, which consumes less storage resources and has strong robustness, and belongs to the technical field of wireless sensor networks. Background technique [0002] In a wireless sensor network, the clock error caused by the difference in crystal oscillator period between nodes is unavoidable. The dormant network can minimize the time when the transceiver module is turned on to save the limited energy of the nodes. The premise of realizing the dormant network is to design all nodes in the whole The method of time synchronization in the running time realizes that all nodes turn on and off the transceiver modules at the same time. [0003] Less storage resources are an important characteristic of wireless sensor network nodes. For dormant wireless sensor networks that have been deployed for a long time, new nodes nee...

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Problems solved by technology

[0003] Less storage resources are an important characteristic of wireless sensor network nodes. For dormant wireless sensor networks that have been deployed for a long time, new nodes need to exchange information with existing nodes to inform other nodes of their own status. After the time is synchronized, the wireless module is turned on at the same time. All of these require the design of complex logic to consider various situations. Therefore, the logic of the common communication method for achieving and maintaining time synchronization for nodes in the entire network is very complicated. The communication method designed in this way is not robust The stickiness is good, but the disadvantage is that the compiled binary file has a large capacity, and after downloading to the node, it will consume a lot of limited storage resources of the wireless sensor network node

[0004] The way to avoid consuming a large amount of node storage resources is to reduce the complexity of the communication method (protocol), but the cost is that the communication method only considers relatively few situations, and the logic design is relatively simple, so the robustness will deteriorate

[0005] It can be seen that, in general, the communication method of a dormant wireless sensor network with a long deployment time consumes more storage resources and maintains the robustness of the communication method. A communication method that maintains time synchronization (so that it only needs to consume less storage resources of wireless sensor network nodes) while maintaining the robustness of the communication method is a very difficult problem in the design and implementation of the communication method

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