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Method and arrangement for enhanced cell identification and cell positioning

A technology for cell identification and position enhancement, applied in positioning, measuring devices, instruments, etc., to achieve the effect of enhancing the accuracy of horizontal position determination and fast altitude information

Inactive Publication Date: 2009-09-16
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

But the accuracy of UTDOA is expected to be somewhat worse than that of A-GPS, mainly because the radio propagation conditions are worse along the Earth's surface compared to receiving GPS radio signals from satellites at high elevation angles

Method used

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  • Method and arrangement for enhanced cell identification and cell positioning
  • Method and arrangement for enhanced cell identification and cell positioning
  • Method and arrangement for enhanced cell identification and cell positioning

Examples

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Embodiment Construction

[0056] In this disclosure, "location determination assistance data" is used to define data used in cell-related activities in a cellular communication system, such as cell ID-based wireless network planning or positioning. For details, reference may be made to the cell relationship configuration and related range definition used in the present invention. It should not be mistaken for "assistance data", which is used only for A-GPS discussion in this disclosure.

[0057] In this disclosure, a WCDMA system is used as a model system. However, those skilled in the art will realize that the basic principles of the present invention are applicable to any cellular communication system, eg GSM. The invention is therefore not limited to such exemplary embodiments.

[0058] Figure 5 A generic WCDMA system 100 is shown. Radio base stations 30 (RBS) are scattered over the coverage area of ​​the system and serve antennas 20, which in this embodiment are sectored antennas. A cell 15 i...

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Abstract

In a method of enhanced position determination of a user terminal associated with at least one cell in a cellular communications network, providing a predetermined cell identity definition SO1 providing Sl a representation of a barometric pressure measure for the user terminal, said barometric pressure measure corresponding to an altitude of the user terminal, and determining S2 at least one geographical region definition based on the provided predetermined cell identity definition and the provided representation of barometric pressure measure, said at least one geographical region definitioncorresponding to a horizontal region associated with said predetermined cell identity definition and said representation of said barometric pressure measure.

Description

technical field [0001] The present invention generally relates to methods and systems for determining the location of a mobile terminal in a cellular communication network, and in particular to such location determination with respect to a cell area. Background technique [0002] All cellular communication systems are divided into cells, where user equipment (UE) is served by one base station, or several base stations in case of (relatively) soft handover. Each base station may serve UEs in more than one cell. From a positioning and navigation perspective, it is important that the cell in which a particular UE is located is known within the cellular system. Therefore, after determining the geographical area covered by a specific cell, as long as the UE is connected and the reported cell identity of the serving cell is equal to the cell identity corresponding to the specific geographical area, it can be stated that the UE is located in the geographical area somewhere within...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W64/00G01S5/02
CPCG01S5/021G01S5/0257G01S5/12H04W64/00G01S5/0236G01S5/02585
Inventor 托尔比约恩·维格伦
Owner TELEFON AB LM ERICSSON (PUBL)
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