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Target tracking method based on transport tree in wireless sensor network

A wireless sensor and target tracking technology, applied in the field of target tracking based on the transmission tree, can solve the problems of reduced network life, increased energy loss of wireless sensor networks, etc., to achieve the effects of reduced energy loss, reduced data volume, and improved quality

Active Publication Date: 2018-05-04
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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Problems solved by technology

[0004] At present, in the target tracking algorithm based on the transmission tree, it is rare to achieve 100% tree coverage, and with the movement of the transmission tree, nodes are constantly added and removed, and the transmission tree needs to be continuously constructed and reconfigured, so that the wireless sensor The energy loss of the network increases, resulting in a decrease in the lifetime of the entire network

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  • Target tracking method based on transport tree in wireless sensor network
  • Target tracking method based on transport tree in wireless sensor network
  • Target tracking method based on transport tree in wireless sensor network

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Embodiment Construction

[0060] The present invention will be further described in detail with reference to the accompanying drawings. The present invention first proposes a system model of a wireless sensor network. Assume that the wireless sensor network is composed of n sensor nodes uniformly deployed in an area. Let the sensor nodes be n i , The related sensor node sequence is V={n 1 ,n 2 ,...,N i ,...,N N }, where |V|=N. The sensor nodes and the underlying network model are as follows:

[0061] 1) The sensors are randomly deployed in a certain area;

[0062] 2) There is a base station (that is, the data receiving end) far away from the square sensing area;

[0063] 3) The sensors and base stations are fixed after deployment;

[0064] 4) All nodes are isomorphic and have the same function;

[0065] 5) Each node is assigned a unique identifier (ID);

[0066] 6) Nodes can change their transmission range by changing the transmission power as needed, that is, nodes have a variable communication radius;

[0067...

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Abstract

The invention discloses a target tracking method based on a transport tree in a wireless sensor network. When the target is close enough to the boundary of a coverage area, a node joining algorithm isexecuted to form an initial tree, and one node close to the target is selected as a temporary root; each node that perceives the target uses a fuzzy inference rule to find a fuzzy distance with the target; the node entering a "far" area from a "very far" area executes the node joining algorithm, and then the transport tree performs reconfiguration; in order to make the root approach to the targetas much as possible, the algorithm selects a node from a "very close" area as a permanent root; when the temporary root moves away from the target and changes the area, the state of the temporary root is broadcasted; and the new temporary root broadcasts the information, each existing node updates a database thereof, and the old temporary root sets the new root as a father node thereof. The transport tree is established on the surrounding of the target within the coverage area, 100% coverage can be achieved, and the accuracy of information acquisition is improved.

Description

Technical field [0001] The invention belongs to the field of wireless sensor networks, and relates to a target tracking method based on a transmission tree in a wireless sensor network. Background technique [0002] Wireless sensor networks (Wireless Sensor Networks, WSNs) are composed of a large number of low-cost micro sensor nodes deployed in the coverage area. These nodes have communication and computing capabilities. They form a self-organizing network system through multi-hop wireless communication. Real-time perception, collection and processing of the information of the internal environment or monitored objects, and the processed information is transmitted to the interested network terminal users. As an emerging hotspot, wireless sensor networks have received increasing attention from academia and industry around the world with their advanced concepts and wide-ranging application prospects. They are regarded as a major influence on human life in the 21st century after the...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/38H04W4/029H04W84/18
CPCH04W4/02H04W84/18
Inventor 陆音张志浩
Owner NANJING UNIV OF POSTS & TELECOMM
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