Wireless sensor network coordinator re-selection algorithm based on assistance of cellular network

Abstract

The invention relates to a wireless sensor network coordinator re-selection algorithm based on assistance of a cellular network. The wireless sensor network coordinator re-selection algorithm comprises the steps of creating a cluster head node information table which is stored in each cluster head node of a wireless sensor network under integration architecture of the cellular network and the wireless sensor network; utilizing power control technology to improve a WSN neighbor node list; sending the collected cluster head node information table and the WSN neighbor node list by a central PAN network coordinator to a base station of the cellular network; traversing each cluster head by the base station of the cellular network according to the cluster head node information table and the WSN neighbor node list, and calculating the selection probability of each cluster head based on a probability formula of a cluster head selection central PAN network coordinator; and selecting a cluster head whose node depth is half of an original WSN maximum network depth as a new central PAN network coordinator. According to the invention, the WSN maximum network depth can be effectively reduced, waste of node energy is reduced and the service time of the WSN network is significantly extended.

Description

technical field [0001] The invention relates to the technical field of mobile wireless communication, in particular to a wireless sensor network coordinator reselection algorithm based on cellular network assistance. Background technique [0002] In most wireless sensor network applications, the sensor nodes transmit the collected data to the cluster head, and then the cluster head transmits to the sink node (referred to as "Sink") through multiple hops, thus forming a "many-to-one" convergent transmission. The central PAN network coordinator (First PAN Coordinator) is the central PAN network coordinator (First PAN Coordinator) in the traditional algorithm such as the ZigBee standard, and any full function device (Full Function Device, referred to as "FFD") has the opportunity to be randomly elected. This random central PAN The network coordinator election method may cause the network depth of the entire wireless sensor to be too large, resulting in a large transmission dela...

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Problems solved by technology

The disadvantage of this approach is: if the edge node of the network is elected as the coordinator, the network depth of the entire network may be too large, and many hops are required from the end node of the network to the root node, resulting in a great waste of energy and network failure. transmission delay

[0004] In order to ensure the reliability of communication, the traditional ZigBee standard simply allows all sensor nodes to use the maximum transmission power to transmit data packets and route packets. The defect of this approach is that two nodes that are very close still use a large transmission power Power exchange information will bring serious power waste and reduce the life cycle of the network, which is not advisable for energy-constrained wireless sensor networks

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