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Self-positioning method for network node of wireless sensor

A wireless sensor and self-positioning technology, which is applied in wireless communication, network topology, electrical components, etc., can solve problems such as obvious errors and network topology influences, reduce the possibility, improve large-arc multi-hop routing vectors, and improve positioning The effect of precision

Active Publication Date: 2013-07-24
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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Problems solved by technology

[0004] Purpose of the invention: The present invention proposes a new method to solve the problem that the distance converted based on the hop count information in the traditional non-ranging positioning process is easily affected by the network topology, especially the error is more obvious in the irregular network. positioning method,

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  • Self-positioning method for network node of wireless sensor
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  • Self-positioning method for network node of wireless sensor

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with accompanying drawing:

[0026] like figure 1 As shown, the wireless sensor network self-location method provided by the present invention includes the following steps:

[0027] Step 1: Using the distance vector exchange protocol, flood broadcast to the network, so that all nodes can obtain the number of hops of all anchor nodes.

[0028] Step 2: According to the network scale and the distribution of anchor nodes, appropriately cluster the anchor nodes to form several sub-regions. In each sub-area, according to the hop distance information between anchor nodes, the current sub-network topology is judged by using the network topology decision factor δ.

[0029] For large-scale wireless sensor networks, the number of nodes in the network is too large. If the global calculation is adopted, it will firstly lead to a very large amount of calculation, and secondly, it will lead to inaccurate identifica...

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Abstract

The invention relates to a self-positioning method for a network node of a wireless sensor. The self-positioning method comprises the following steps of flooding broadcast to internet by utilizing a distance vector exchange protocol so that all nodes obtain the light-flooding number of all anchor nodes; clustering the anchor nodes to form a plurality of subareas; judging a current sub-network topology structure by utilizing a network topology structure judgment factor according to light-flooding distance information among the anchor nodes; screening elements in a set one by one to find out nodes meeting promotion conditions and reference anchor nodes for positioning the nodes; promoting the nodes meeting the judging conditions; and repeatedly traversing all the nodes and carrying out a promotion strategy till all unknown nodes are positioned. Compared with the prior art, the self-positioning method for the network node of the wireless sensor, disclosed by the invention, has the advantages of adding the node promotion strategy based on a DV-distance algorithm, reducing the distance accumulation errors of route vectors among the nodes of an asymmetrical network and improving the integral positioning precision.

Description

technical field [0001] The invention relates to a wireless sensor network node self-positioning method, which is suitable for sensor network systems with self-organizing characteristics. Background technique [0002] Wireless sensor networks have the advantages of strong concealment, rapid deployment, self-organization, low cost, and ability to work in harsh and special environments. At present, our research on wireless sensor networks is still in its infancy, and there are still some key technologies The problem needs to be solved urgently. Large-scale wireless sensor networks are usually randomly scattered in the monitored area by means of aircraft sowing, rocket ejection, etc., and the location information of nodes has great uncertainty. However, for nodes that do not have determined location information, the collected data information has almost no application value. Therefore, in various applications of wireless sensor networks, the location information of nodes is ve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W40/20H04W64/00H04W84/18
Inventor 贲伟吴振锋蒋飞刘兴川
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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