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The Radio Positioning System (RPS) with GPS-like accuracy in Indoor & Outdoor Locations

IP.com Disclosure Number: IPCOM000248902D
Publication Date: 2017-Jan-20

Publishing Venue

The IP.com Prior Art Database

Abstract

Radio Positioning System (RPS) is a Fingerprint Geolocation solution that allows to determine real-time location of a mobile handset with GPS-like accuracy by using only the ubiquitous Mobile Radio Network information. The need of RPS is driven by the increased demand of Location Based Services requiring location of any user at any time in Indoor and Outdoor scenarios like footfalls, user patterns, big data. Disclosed are new methods identified to optimise a Fingerprinting Geolocation system efficiency and increase the accuracy and reliability focused on: fingerprint database construction, database bounding and database look up.

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The Radio Positioning System (RPS) with GPS-like accuracy in Indoor & Outdoor Locations

Vodafone Group Services Ltd. : Clara Serrano, Fran Dominguez, Mai Tran Le, Mabel Pous-Fenollar, Santiago Tenorio.

Astellia S.A. : Javier López, Vicente Osa, Vicent Soler.

Abstract

Radio Positioning System (RPS) is a Fingerprint Geolocation solution that allows to determine real-time location of a mobile handset with GPS-like accuracy by using only the ubiquitous Mobile Radio Network information. The need of RPS is driven by the increased demand of Location Based Services requiring location of any user at any time in Indoor and Outdoor scenarios like footfalls, user patterns, big data. Disclosed are new methods identified to optimise a Fingerprinting Geolocation system efficiency and increase the accuracy and reliability focused on: fingerprint database construction, database bounding and database look up.

Introduction

Radio Positioning System (RPS) is a location method based on Global Positioning System (GPS) and radio frequency information fingerprinting. The goal is to increase the current Mobile Network location accuracy up to a GPS-like accuracy with the ability to accurately locate any user at any time without GPS signal availability, thus allowing new use cases for Big Data for both Indoor & Outdoor.

In order to locate any user at any time without any dependency on their GPS signal availability, the radio information reported from users to the mobile network in the form of measurement reports can be used.

Main existing location methods based on Mobile Network information are the following:

  • Cell ID: it is a generally unique number used to identify each Base Transceiver Station (BTS) sector and frequency, which is called “cell”. Positioning estimation is based on the cell delimited area. The accuracy can go from 500m up to several km depending on the size of the cell.
  • Trilateration: radio information (i.e. signal level, temporal radio measurements) reported by users to the network is “geographically correlated”. Positioning estimation is based on this information correlation. The accuracy can be around 150m of error in the 75th percentile.

The new location method, RPS, is performed with the following steps:

Figure 1. Radio Location Fingerprinting steps

1)      Database Construction. A database is built with both GPS and radio information reported by UEs

·         Latitude/Longitude from GPS and mobile network information reported from customers to the network are stored in the database.

·         Every GPS position is characterized by its mobile network information and we can consider it a sample.

2)      User Positioning. Afterwards, customers are located in real time by using only their radio information looking for the position in the database. Three steps are performed:

·         Bounding: Radio parameters are used to select the set of samples within the whole database that will be post-processed to accelerate the post-processing time.

·         Look up:  the algorithm looks...