Method and system for cooperatively locating heterogeneous network based on WLAN and WSN

Abstract

The invention discloses a method and system for cooperatively locating a heterogeneous network based on WLAN and a WSN. The method comprises the following steps that a WLAN and WSN mixed locating system for the heterogeneous network is built in a locating area; N sets of data closest to the sampling information of a node to be measured are selected through a WLAN locating technology; the position of the node to be measured is estimated based on a WSN locating technology; cooperative locating is carried out through the WLAN and the WSN, the data selected through the WLAN technology are compared with estimation coordinates in the WSN locating technology, and the set of closest position information is selected as the final estimation position of the node to be measured. According to the method and the system, the advantages that WSN networking is flexible and WLAN network transmission speed is high are effectively combined, all technical defects are avoided, through the existing WLAN, the existing WSN and the designed network fusion algorithm, locating precision is obviously improved, and meanwhile signal flying value points caused by a complex and changeable environment can be removed.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a positioning method and system, in particular to a heterogeneous network cooperative positioning method and system based on WLAN and WSN. Background technique [0002] Wireless Local Area Networks (WLAN) is a network for wireless communication within a local area using wireless media or media. The transmission media of WLAN includes radio frequency radio waves and light waves. The positioning based on the wireless local area network is to analyze the characteristic information of the received radio signal in the wireless local area network, and calculate the position of the measured object according to a specific algorithm. [0003] A wireless sensor network (Wireless Sensor Network, WSN) is a wireless network composed of a large number of stationary or moving sensors in a self-organizing and multi-hop manner to cooperatively perceive, collect, process and transmit the perce...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the defects in the prior art that only using the wireless local area network WLAN or the wireless sensor network WSN positioning accuracy is not high, and the reliability and stability are greatly affected by environmental factors. Heterogeneous network co-location technology with wireless sensor network can improve the anti-interference ability of the system and the accuracy of indoor positioning

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