Base station positioning Overview

Base station positioning

Base station positioning is generally applied to mobile phone users. The mobile phone base station positioning service is also called lbslocation based service. It uses the networks of Telecom mobile operators (such as GSM networks) it is a value-added service that obtains the location information (longitude and latitude coordinates) of a mobile terminal user and provides the user with the support of the Electronic Map platform, for example, the dynamic location query service provided by China Mobile motion zone.

 

Glossary

Basic Principle of base station positioning [1]: mobile phones measure Downstream Guide signals of different base stations to obtain the time of arrival (TOA) of Downstream Guide signals of different base stations) or TDoA (Time Difference of arrival, time difference of Arrival). Based on the measurement result and the coordinates of the base station, the location of the mobile phone can be calculated by using the Triangle Formula estimation algorithm. The actual location estimation algorithm needs to consider the situation where multiple base stations (3 or more) are located, so the algorithm is much more complicated. Generally, the higher the number of base stations measured by the Mobile Station, the higher the measurement accuracy, and the more obvious the positioning performance improvement.

 

Technical Principles

Mobile Phone Positioning refers to a technology or service that uses a specific positioning technology to obtain the location information (longitude and latitude coordinates) of a mobile phone or end user and mark the location of the object to be located on an electronic map. There are two types of positioning technology: GPS-based positioning and mobile operation network-based base station positioning. The GPS-based Positioning method uses the GPS positioning module on the mobile phone to send its own location signal to the positioning background for mobile phone positioning. Base station positioning uses the distance between the base station and the mobile phone to determine the mobile phone location. The latter does not require a mobile phone to have GPS positioning capabilities, but its accuracy depends largely on the distribution of the base station and the coverage. Sometimes the error may exceed one kilometer. The former has a high positioning accuracy. In addition, WiFi can be used to locate the problem in a small range.

 

 

Main Applications

Base station positioning is mainly used for mobile phone users and GPS handheld terminals, such as dynamic location query services provided by China Mobile mobile motion zone; rough positioning in various mobile phone map software such as Google mobile map; and GPS with the generation of A-GPS and so on are the use of base station positioning to achieve.

 

Typical applications

Parent positioning for the elderly and children, mainly for safety and concern needs; vehicle management by enterprises; for reasons such as high GPS cost and no signal in the basement, some logistics companies adopt mobile phone GSM positioning technology solutions. The cost of this solution is 1/3 of that of GPS, but the cost of continuous positioning is high due to the limitations of the network resources of mobile base stations. Enterprise Management of employees; can provide management for sales companies with multiple divisions and work hours for sales personnel.

 

Difference GPS

GPS Positioning uses satellites, which are expensive and accurate, but cannot be located indoors. The positioning accuracy of the base station is low, but it can be located indoors.

 

Actual Effect

The establishment of satellite positioning base stations solves the "different regions and different precision" phenomenon caused by historical reasons and backward technical equipment problems, thus achieving a high-precision and unified control network, so that the surveying accuracy anywhere can reach the centimeter level.

 

Basic explanation

Positioning,

Satellite positioning,

Base station positioning

Mobile Phone Positioning

 

Mobile Positioning

Differences between mobile positioning and base station positioning

 

In recent years, with the increase of user demand, mobile positioning technology has received more and more attention, promoting the development of mobile positioning technology research and Ranging technology. How to use existing network resources as much as possible to precisely locate users at a low cost has always been the focus of research.

There are two main categories of solutions to achieve mobile positioning, the first category is the positioning technology led by mobile station (MS. From a technical point of view, this technology is easier to provide more precise user positioning information. It can use some existing positioning systems, such as integrating GPS receivers in mobile stations, this allows you to precisely locate users by using existing GPS signals. However, such technologies need to add new hardware on the mobile site, which will adversely affect the size and cost of the mobile site.

 

The second type is the positioning technology led by the base station (BS). This solution requires some improvement to the existing base station and switch center, but it can be compatible with existing terminal devices. Specific implementation technologies available include: Measuring Signal Direction (signal arrival angle, AOA for short) positioning Technology, positioning technology for measuring signal power, positioning technology for measuring signal propagation time characteristics (arrival time, referred to as Toa; arrival time difference, referred to as TDOA. To improve positioning accuracy, you can also use the combination of the above several technologies.

 

For more positioning details, see http://www.haoservice.com/apilist/

Base station positioning Overview