Method of refining node position information in wireless sensor network
First Claim
1. A method of refining a node position information in a wireless sensor network, comprising:
- setting an initial position based on an anchor node;
receiving a position refining message from the anchor node;
refining the initial position by measuring a distance to neighboring nodes based on the anchor node; and
notifying the refined position, by switching into a pseudo anchor node based on a refined position information, and broadcasting the refined position information and a pseudo anchor information to the neighboring nodes.
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Abstract
Provided is a method for refining node position information in a wireless sensor network having an ultra wideband communication network and a wireless personal area network where the initial positions of respective nodes are set, by utilizing nodes at a 2-hop distance, or more than a 2-hop distance when the number of neighboring nodes at a 1-hop distance is not sufficient to perform triangulation, and to refine the position of nodes based on a distance measured between the respective nodes. Because the initial position is refined and confirmed in a wireless sensor network, a user node operates as a pseudo anchor node for the nodes which have no anchor node nearby. Furthermore, as a node has the refined position, it can act as a pseudo anchor node and be used to compute the position of the other nodes. Additionally, positions of nodes of the wireless sensor network can be estimated with more accuracy.
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Citations
9 Claims
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1. A method of refining a node position information in a wireless sensor network, comprising:
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setting an initial position based on an anchor node;
receiving a position refining message from the anchor node;
refining the initial position by measuring a distance to neighboring nodes based on the anchor node; and
notifying the refined position, by switching into a pseudo anchor node based on a refined position information, and broadcasting the refined position information and a pseudo anchor information to the neighboring nodes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification