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Collective positioning in mobile communication systems

A co-location and cellular communication system technology, applied in the field of positioning task management, to achieve the effects of performance improvement, processing simplification, and signaling resource reduction

Inactive Publication Date: 2009-08-12
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, a terminal close to an RBS in its own cell is unlikely to transmit at a power level sufficient for detection by a distant RBS

Method used

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  • Collective positioning in mobile communication systems
  • Collective positioning in mobile communication systems
  • Collective positioning in mobile communication systems

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The present invention relies on the understanding that positioning properties such as availability, response time and positioning accuracy will generally be improved if common commands and continuous position determination are performed within a reasonable period of time. Results from the first position determination can often be used to simplify or improve the accuracy of the second position determination. Examples of this are given further below. In general, a long time between successive positionings gives a small benefit; a short time between consecutive positionings gives a greater benefit. Improvements may be in one or more of usability, response time, and location accuracy.

[0028] When starting to use cellular communication, positioning is not a very important issue, and the number of times positioning is actually requested is relatively small. This leads to communication standards in which positioning requests are handled essentially on a case-by-case basis....

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Abstract

Methods and devices for managing a cellular communication system (1) and mobile terminals (40) are presented. A collective positioning measurement order (50) is issued to a multitude of mobile terminals (40) in a first cell (10) of the cellular communication system (1). This issuing is preferably performed intermittently at a multitude of times according to a predetermined rule. Each mobile terminal (40) receives information concerning a collective positioning measurement order. The mobile terminal (40) performs a positioning operation, typically a positioning measurement on a ranging signal (51 , 52) or transmission of a ranging signal (53). preferably intermittently at a multitude of times, according to a predetermined rule based on the information concerning the collective positioning measurement order. An updating of a storage with positioning data can preferably be obtained. In terrestrially based positioning systems, signal resources dedicated to positioning measurement can be reserved in the cellular communication system.

Description

technical field [0001] The present invention generally relates to the management of positioning tasks in mobile communication systems. Background technique [0002] Precise positioning is important in wireless cellular systems and will become increasingly important as regulators force operators to meet emergency positioning requirements such as E911 (in the US) and E112 (in Europe). In such a situation, it is particularly important to ensure good performance in terms of availability, response time and accuracy. Also, different kinds of additional services based on the location of the mobile terminal are becoming more and more common. [0003] In order to obtain accurate positioning information, there are many different methods available in today's cellular systems. Some of these methods are based solely on measurements made within the radio network itself, while others use external sources such as satellite positioning systems to derive the position in the cellular system....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04W64/00G01S5/00G01S5/02
CPCG01S5/0257H04W64/00H04W4/06G01S5/0009H04L12/189
Inventor T·威格伦D·格斯滕伯格B·戈兰森S·帕克瓦尔
Owner TELEFON AB LM ERICSSON (PUBL)
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