Determining method for indoor node region of wireless sensor network

A wireless sensor network and indoor node technology, which is applied in the field of determination of indoor node areas of wireless sensor networks, can solve problems such as wireless signal weakening and positioning accuracy reduction, and achieve good implementation effects

Inactive Publication Date: 2009-04-29
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Summary
  • Abstract
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Problems solved by technology

The advantage of this algorithm is that it takes into account the signal attenuation characteristics of the wireless signal when it passes through the wall, but in the actual system, if it encounters a wall, the wireless signal will not be weakened much (for example, many hollow walls in modern buildings), two connected areas ( Such as corridors) or the size of the area is inconsistent, the positioning accuracy of the algorithm will be greatly reduced

Method used

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  • Determining method for indoor node region of wireless sensor network
  • Determining method for indoor node region of wireless sensor network
  • Determining method for indoor node region of wireless sensor network

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Embodiment

[0022] Embodiment: A method for determining the indoor node area of ​​a wireless sensor network. First, collect RSSI information, then assemble the collected RSSI information into an information packet and send it to the positioning server, and then the server processes the RSSI information, and finally obtains the mobile The area location of the node is special in that: the area of ​​the mobile node is judged by using the point filtering mechanism and the area filtering mechanism.

[0023] Specifically, RSSI information collection refers to: the anchor node broadcasts signal detection packets periodically (for example, the period is 2 seconds), and the mobile node obtains RSSI information after receiving the detection packet from the anchor node, and assembles multiple RSSI information into a data packet It is sent to the base station node through a multi-hop routing mechanism, and finally transmitted to the tracking system server.

[0024] Further, each time the positioning ...

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Abstract

The invention discloses a method for judging a node region in a wireless sensor network chamber. The method comprises the following steps: determining which region does the mobile node belong to in a real-time manner for a point filtering mechanism and a surface filtering mechanism of RSSI information by reference to the RSSI information of an adjacent anchor node which is received by a mobile node to realize exact positioning of the mobile node while the mobile node moves among a plurality of regions. Therefore, an effective method is provided for positioning and tracking the mobile node while the mobile node moves among a plurality of regions.

Description

technical field [0001] The invention relates to a method for judging an indoor node area of ​​a wireless sensor network based on received signal strength (Received Signal Strength, RSS). Background technique [0002] In the application of positioning and tracking of mobile objects or people based on wireless sensor networks, this type of system usually includes a certain number of anchor nodes and mobile nodes. The anchor node is a node whose physical location information is known in the system, such as pre-arranged at a given location, etc. These nodes usually remain static in the system. The anchor node periodically sends signal detection packets, and the mobile node calculates the Received Signal Strength Indicator (RSSI) information according to the received detection packets, and assembles multiple received RSSI information into a data packet It is sent to the server through a multi-hop route, and the server calculates the current real-time position of each moving obje...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00H04W84/18H04W4/02
Inventor 徐宏力黄刘生徐犇徐涛霍永凯
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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