Covering method for three-dimensional directional movement-based underwater wireless sensor network

Abstract

The invention discloses a covering method for a three-dimensional directional movement-based underwater wireless sensor network. The covering method comprises the following steps: (1) transmitting information to neighbor nodes by underwater wireless sensor nodes; (2) performing statistics on the number and the positional information of the neighbor nodes by each node, and meanwhile, computing the distance from each neighbor node to the nodes; (3) computing virtual distance vectors that the nodes need to move for all the neighbor nodes in sequence according to the positional information of the neighbor nodes; (4) computing the distance from each node to the boundary of a deployment area and the virtual distance that each node needs to move to keep away from the boundary according to node coordinates; (5) performing weighted summation on the virtual distance computed in the step (3) and the virtual distance computed in the step (4), and performing optimization on all the underwater nodes in the whole network in sequence according to the order of ID (identity) numbers of the nodes. According to the covering method disclosed by the invention, fine adjustment optimization is performed on positions of the nodes, and therefore, node deployment in the network approaches to uniform distribution so as to optimize and improve the coverage rate of the whole underwater three-dimensional network.

Description

technical field [0001] The invention relates to the field of wireless sensor network coverage methods, in particular to a wireless sensor network coverage method based on three-dimensional directional movement. Background technique [0002] At present, the 3D underwater wireless sensor network usually deploys nodes in the underwater 3D space to detect and observe underwater events that cannot be completely monitored by the underwater nodes. In the 3D underwater network, the underwater nodes communicate with the The buoys are connected, and a wireless communication module is installed on the buoys on the water surface. The wireless communication nodes on the water surface can communicate with the base station on the shore in a single-hop or multi-hop manner. At the same time, the 3D underwater wireless sensor network can adjust the depth of nodes underwater by adjusting the length of the cable to meet the needs of 3D coverage. [0003] The three-dimensional underwater wirele...

AI Technical Summary

Problems solved by technology

The virtual force method has become a current research hotspot because of its flexibility and stability, but it also has its shortcomings: 1. The virtual force method needs to calculate the virtual force between any two sensor nodes in the area according to the distance between nodes, and the calculation amount is relatively large. Large; 2. In the virtual force method, the force direction of the node is omnidirectional, and the direction of movement is consistent with the direction of force. In the coverage of the two-dimensional plane, the coverage rate can be effectively improved

However, in the sensor network with three-dimensional directional movement, since the direction of the force is not consistent with the direction of movement, the magnitude of the virtual force is not proportional to the distance the node needs to move

Therefore, the virtual force coverage optimization method is not suitable for 3D underwater sensor network

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