Positioning method on basis of wireless local area network
A technology of wireless local area network and positioning method, which is applied in the field of positioning based on wireless local area network, can solve the problems of indoor application limitation, small signal coverage, and the positioning method cannot meet the needs of the application, and achieves the effect of low cost and accurate positioning
Active Publication Date: 2015-07-01
ESPRESSIF SYST SHANGHAI
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Problems solved by technology
The existing positioning methods have the following disadvantages: (1) The positioning method based on the satellite clock system needs to receive satellite signals, and its indoor application is limited; (2) The signal coverage of the ultra-wideband system is very small, and its wireless transmission distance is only a few meters, so positioning methods based on UWB systems cannot meet the needs of most applications
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Embodiment Construction
[0035] The present invention will be further elaborated below by describing a preferred specific embodiment of two-dimensional plane positioning in detail in conjunction with the accompanying drawings.
[0036] A positioning method based on a wireless local area network of the present invention uses a wireless transceiver device A with a known position and one or more monitoring devices B with a known position within the coverage area of the wireless local area network, and sets the wireless transceiver device A and each monitoring device The computing module C connected to the network of the device B locates the located device X whose location is unknown. The wireless local area network is constructed by the commercially available wireless access device P as a wireless access point (Wireless Access Point, AP). . Computing module C can be arranged in the wireless local area network coverage area that positioning method of the present invention uses, and it can be an indepen...
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The invention discloses a positioning method on the basis of a wireless local area network. The method comprises the following steps: arranging a wireless transceiver A in a known position, one or more monitors B in the known positions and an operating module C networked with the wireless transceiver A and each of the monitors B in an area covered by the wireless local area network; sending a packet M to a positioned device X through the wireless transceiver A or a wireless accessing device P; returning a packet N by the positioned device X; respectively measuring time intervals from receiving the packet M to receiving the packet N by the wireless transceiver A and each of the monitors B; and utilizing the measured time intervals to calculate the position of the positioned device X by the operating module C. According to the positioning method, in the area covered by the wireless local area network, wireless communication equipment in the known position is utilized to realize the positioning for the wireless communication equipment in an unknown position, the positioning is accurate and the cost is low.
Description
technical field [0001] The invention relates to a positioning method, in particular to a positioning method based on a wireless local area network. Background technique [0002] State-of-the-art positioning methods must be based on a precise satellite clock system (such as the Global Positioning System) or an ultra-wideband system (such as a wireless personal area network). The Global Positioning System (GPS) achieves positioning by measuring the time difference between signals sent by more than four satellites arriving at the local area. The positioning method based on Wireless Personal Area Network (WPAN) obtains the propagation time of the wireless signal through the pulse sequence, so as to calculate the distance between two points to achieve positioning. The existing positioning methods have the following disadvantages: (1) The positioning method based on the satellite clock system needs to receive satellite signals, and its indoor application is limited; (2) The signa...
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IPC IPC(8): H04W64/00
Inventor 符运生林豪王茜
Owner ESPRESSIF SYST SHANGHAI