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Seamless switching method between indoor wireless location and outdoor wireless location based on cost function

A cost function, wireless positioning technology, applied in the direction of wireless communication, electrical components, etc., can solve the problem of seamless switching between indoor wireless positioning and outdoor wireless positioning, and achieve the effect of solving the problem of seamless switching.

Inactive Publication Date: 2012-11-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to solve the problem that the existing indoor wireless positioning and outdoor wireless positioning cannot be switched seamlessly, and further provide a seamless switching method between indoor wireless positioning and outdoor wireless positioning based on a cost function

Method used

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  • Seamless switching method between indoor wireless location and outdoor wireless location based on cost function
  • Seamless switching method between indoor wireless location and outdoor wireless location based on cost function
  • Seamless switching method between indoor wireless location and outdoor wireless location based on cost function

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specific Embodiment approach 1

[0038] Specific implementation mode one: combine image 3 To illustrate this embodiment, the specific steps of the method for seamless switching between indoor wireless positioning and outdoor wireless positioning based on the cost function in this embodiment are as follows:

[0039] Step 1. Set the overlapping area

[0040] (1) Space setting of the overlapping area: the setting of the overlapping area is specifically as follows: to ensure that the user can receive the signal broadcast by the positioning system when entering the signal coverage area of ​​the positioning system, and the typical user's movement speed The time required to cross the overlapping area is greater than the time required to download the information required for positioning, so that the user has completely downloaded the data required for positioning when entering the target positioning system;

[0041] (2) The establishment of positioning in the overlapping area: users should be able to obtain the loc...

Embodiment

[0075] combine Figure 3-Figure 4 To further illustrate the present invention, Figure 4 The schematic diagram of the indoor and outdoor switching area obtained through software simulation through the switching method based on the cost function is given. The indoor positioning uses the WLAN-based fingerprint positioning system, and the outdoor uses the GPS system. In the experiment, a spacious indoor environment and its surrounding outdoor environment are simulated. Four APs (wireless access points) are evenly arranged indoors. The transmit power of each AP is -17dBm, and the signal overlap area extends 10m outside the wall. In the simulation, the classical logarithmic model is used to simulate the fading of the WLAN signal, and the floor attenuation factor model is used to simulate the attenuation of the WLAN signal after passing through the wall. image 3 The black box in the middle represents the wall of the room, and the white circle represents the location of the AP. Th...

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Abstract

The invention relates to a seamless switching method between indoor wireless location and outdoor wireless location based on cost function, specifically relates to a seamless switching method between indoor wireless location and outdoor wireless location, aiming solving the problem that the existing indoor wireless location and outdoor wireless location cannot be seamlessly switched; the method specifically comprises the following steps: step one, setting a crossover region; step two, selecting parameters: selecting different parameters according to different positioning systems to take part in cost function operation; step three, setting the weight; step four, determining the threshold or the residence time; and step five, comparing the cost function. The seamless switching method provided by the invention is used for the seamless switching between the indoor wireless location and outdoor wireless location in the wireless location technology.

Description

technical field [0001] The invention relates to a method for seamless switching between indoor wireless positioning and outdoor wireless positioning, in particular to a seamless switching method between indoor wireless positioning and outdoor wireless positioning based on a cost function, and belongs to the field of radio technology. Background technique [0002] The current radio positioning technology is mainly divided into indoor positioning and outdoor positioning according to different application environments. The outdoor positioning service is mainly provided by the global satellite navigation system (GNSS), which is quite mature at present. In terms of indoor positioning technology, after years of development, it is also close to maturity. At present, the mainstream research directions include fingerprint positioning technology based on received signal strength (RSS) under various short-distance wireless communication systems, such as WLAN, Bluetooth, ZigBee, etc.; ...

Claims

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Application Information

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IPC IPC(8): H04W36/00H04W36/18H04W64/00
Inventor 孟维晓邹德岳于启月吴萌刘恩晓陈雷马琳
Owner HARBIN INST OF TECH