Unlock instant, AI-driven research and patent intelligence for your innovation.

Apparatus and method for selecting an access point for positioning

An access point, selected technology, applied in the direction of location-based services, positioning, measurement devices, etc., can solve problems such as increasing the cost of mobile equipment

Active Publication Date: 2018-10-30
TEXAS INSTR INC
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Satellite positioning also requires a specialized receiver, which adds to the cost of the mobile device

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus and method for selecting an access point for positioning
  • Apparatus and method for selecting an access point for positioning
  • Apparatus and method for selecting an access point for positioning

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] The following discussion refers to various embodiments of the invention. Although one or more of these embodiments may be preferred, the embodiments disclosed should not be interpreted, or otherwise used, as limiting the scope of the disclosure, including that of the claims. In addition, those skilled in the art should understand that the following descriptions have broad application, and that any discussion of an embodiment is considered an exemplary discussion of that embodiment only, and is not intended to imply that the scope of the present disclosure (including the claims) is limited to this Example.

[0014] In order for a mobile wireless device to establish its location via wireless local area network (WLAN) positioning, the device receives signals from access points (APs) in the vicinity of the device. The location of the AP is known, and based on the strength of the received AP signal, the mobile wireless device can estimate its location. The wireless device ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Apparatus and method for selecting an access point for positioning. The invention relates to a device and method for locating equipment based on wireless local area network signals. In one embodiment, the wireless local area network positioning system (114) includes access point selection logic (206). Access point selection logic (206) includes likelihood calculation logic (208), minimum mean square error (MMSE) estimation logic (210), variance calculation logic (212), and access point exclusion logic (214). The likelihood computation logic block (208) is configured to compute likelihood values ​​for each access point and point of the positioning grid. The MMSE estimation logic block (210) is configured to compute an MMSE estimate based on the likelihood values. The variance calculation logic (212) is configured to calculate the MMSE variance of the MMSE estimate. The access point exclusion logic block (214) is configured to determine whether excluding the selected one of the access points reduces the MMSE variance, and excludes the selected access point from the access points used for positioning based on the exclusion reducing the MMSE variance point.

Description

Background technique [0001] As mobile devices become more ubiquitous, so does the need to adapt services based on the device's location. Location-based services rely on positioning systems to determine a device's location. Satellite-based positioning systems such as the Global Positioning System (GPS), GLONASS, and Galileo can provide high accuracy but require a clear line of sight between the satellites and the mobile device in order to provide position determination. Therefore, satellite positioning systems are largely ineffective for indoor positioning. Satellite positioning also requires specialized receivers, which adds to the cost of the mobile device. [0002] As an alternative or enhancement to satellite-based positioning, Wireless Local Area Network (WLAN) based positioning systems have been developed. WLAN-based positioning systems are suitable for indoor positioning and require minimal investment because they utilize existing infrastructure. Additionally, many m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H04W64/00H04W4/02
CPCH04W4/02G01S5/021
Inventor M·F·曼苏尔
Owner TEXAS INSTR INC