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Positioning and tracking system method of active nodes in linear environment

An active node, positioning and tracking technology, applied in wireless communication, electrical components, etc., can solve problems such as lack of precise positioning system

Inactive Publication Date: 2011-06-01
SUZHOU INST FOR ADVANCED STUDY USTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The precise positioning system and positioning method for active nodes in such a linear environment are lacking in the prior art

Method used

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  • Positioning and tracking system method of active nodes in linear environment
  • Positioning and tracking system method of active nodes in linear environment
  • Positioning and tracking system method of active nodes in linear environment

Examples

Experimental program
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Embodiment

[0047] Such as image 3 As shown, this embodiment provides a mobile personnel positioning and tracking system in a WIFI wireless network linear environment. First, the positioning tag sends a detection packet in a faster cycle (set to 300ms in the system). Then, when the AP node collects the detection frame, it calculates the corresponding RSSI value, and updates the MAC address of the positioning tag and the corresponding RSSI value to the dynamically augmented array AP[Size][2]. Note that each AP only saves the location label corresponding to the largest Max RSSI information, that is, it satisfies Size<=Max, and other smaller RSSI information will be discarded. The AP node also packs its MAC address and the corresponding AP[Size][2] array to the server in a certain period (which is greater than the packet sending period of the positioning tag, set to 500ms in the system).

[0048] The AP server parses the received data packets of each AP, and integrates the RSSI information in ...

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Abstract

The invention discloses a positioning and tracking system and method of active nodes in a linear environment. The system comprises wireless access points, positioning labels and a server, wherein the server is communicated with the wireless access points; the positioning labels can move in the linear region of the linear environment as active nodes, and send frame exploring data periodically; the wireless access points are distributed at the fixed positions in the linear environment as anchor nodes, and are used for capturing the frame exploring data sent by the positioning labels, calculating the received signal strength indicator (RSSI) information of the positioning labels in accordance with the captured frame exploring data, and packaging the RSSI information of the positioning labels into packets as well as directly sending the packets to the server by multi-skip wireless routers or wired networks; and the server integrates the RSSI information of all the positioning labels, and acquires the real-time position of each positioning label in accordance with the RSSI information of all the positioning labels. The positioning and tracking system is accurate, reliable and stable in positioning.

Description

Technical field [0001] The invention relates to a method for positioning and tracking a mobile node, in particular to a method for positioning and tracking a node in a WIFI wireless network based on a received signal strength (RSSI) linear environment, and belongs to the technical field of telecommunications. Background technique [0002] In a WIFI wireless network, it usually contains a certain number of WIFI access points (Access Points, AP nodes). Since these AP nodes are not movable, these AP nodes are generally regarded as fixed locations with known physical location information. Anchor node (fixed node). In order to locate personnel, each personnel is required to carry a positioning tag. Due to the movement of personnel, each positioning tag can be regarded as a mobile node. In general, in order to consider cost factors, the positioning tags used only have the ability to periodically send detection frames, but do not have the function of sending custom data frames. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00
Inventor 刘刚黄刘生汪炀蒋胜龙徐宏力杜丙坚张银东
Owner SUZHOU INST FOR ADVANCED STUDY USTC
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