An optimal one-way communication path selection method between wireless sensor network nodes

Abstract

The invention discloses an optimal unidirectional communication path selection method between wireless sensor network nodes. The method comprises the following four steps: a node broadcasts a relative hop test packet, and the node and a direct neighbor node thereof calculate a relative hop; the node broadcasts an optimal unidirectional communication path detection packet, and other nodes determine a minimum hop from a packet sending node to itself, an optimal unidirectional communication path and the relative hop; other nodes send an optimal unidirectional communication path notification packet to the packet sending node; and the node requests a specific node to send the optimal unidirectional communication path detection packet by a path detection packet request sending message to obtain the optimal unidirectional communication path information from the specific node to itself. According to the optimal unidirectional communication path selection method disclosed by the invention, the irregularity of the communication radiation range of the nodes and the inconsistency of node distribution are fully considered, the unidirectional communication path between the nodes is selected in combination with the minimum communication hop and the relative hop, the optimal unidirectional communication path is selected, the performance is stable, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless sensor networks, in particular to a method for selecting an optimal one-way communication path between nodes of a wireless sensor network. Background technique [0002] At present, wireless sensor network node positioning methods are divided into ranging positioning methods and non-ranging positioning methods. [0003] The distance-based positioning method needs to use additional hardware to measure the distance or angle between the sensor nodes, and then calculate the position of the node to be located according to the trilateration or triangulation method. The positioning accuracy of this type of positioning method is relatively high, but due to the need for additional hardware, the cost consumption is relatively large, so this type of method is not suitable for application in large-scale wireless sensor networks. [0004] The current research direction is mainly based on non-ranging positioni...

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Problems solved by technology

[0010] 1. Under the condition of non-uniform distribution network, it is not appropriate to calculate only one average hop distance for each unknown node;

[0011] 2. Due to the symmetry and asymmetry of the node radiation radius in the actual network, which brings about the asymmetry of the communication between nodes, the above-mentioned existing algorithms do not consider these factors, and the average calculated by applying to the actual network The jump distance and positioning position accuracy are limited;

[0012] 3. The relevant information in the execution process of the positioning algorithm is not fully utilized

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