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Positioning method applied in multi carrier frequency system

A positioning method and multi-carrier frequency technology, applied in the direction of location information-based services, wireless communication, electrical components, etc., can solve the problem of not making full use of UE positioning accuracy, and achieve the effect of simple implementation and improved positioning accuracy

Inactive Publication Date: 2009-07-08
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the current positioning method is used in multi-carrier frequency cells, that is, in the cell ID positioning mode after cell update triggered by handover or cell reselection, the network only uses the current serving cell ID for positioning, and it will not make full use of the UE just in Effective position information of switching area to improve positioning accuracy

Method used

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  • Positioning method applied in multi carrier frequency system
  • Positioning method applied in multi carrier frequency system
  • Positioning method applied in multi carrier frequency system

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Embodiment Construction

[0032] In the current TD-SCDMA system, UE (mobile terminal) has two working modes: connected mode and idle mode.

[0033] In idle mode, when the UE roams into a new cell (including when the UE is turned on in the new cell), the network does not know which cell the UE is in, and the RNC does not have an instance record of the UE. ) connection, the RNC creates an instance of the UE in the connection mode in the background database, including information such as URNTI (URTAN Radio Network TemporaryIdentity, URTAN wireless network temporary identity), CRNTI (Cell Network TemporaryIdentity, cell wireless network temporary identity).

[0034] The connection mode includes four states: CELL_DCH (dedicated state), CELL_PCH, CELL_FACH and URA_PCH. Under CELL_DCH, the UE enters a new cell by means of handover. In the TD-SCDMA system, a hard handover process accompanied by relocation is currently used; in the CELL_PCH and CELL_FACH states, after the UE enters a new cell from the original ...

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Abstract

The invention discloses a positioning method applied in a multi-carrier frequency system, which adds the original serving cell identifier, the current serving cell identifier, and the time stamp information of the cell update time triggered by handover or cell reselection to the UE instance record saved in the RNC ; During the cell update process triggered by the handover or cell reselection of the UE, the RNC of the cell to which the UE moves updates or creates a database of the original serving cell identity, the current serving cell identity and the timestamp information in the UE instance record ;The network side receives a positioning request based on the cell identity. If the positioning request is initiated during or within a set time after the cell update triggered by UE handover or cell reselection, the network will use the original serving cell and the current serving cell. ID, using the geographical location information of the overlapping area of ​​the two cells as the current location information of the UE. The invention improves the positioning accuracy based on the cell identification, and the realization is very simple.

Description

technical field [0001] The present invention relates to a wireless communication system, in particular to a method for determining the geographic location of a mobile user in a TD-SCDMA system Background technique [0002] The mobile positioning service in the wireless network system is increasingly concerned. Its main applications are: emergency call location service for user safety; location tracking of related criminal activities; personal location service (such as traffic, accommodation and other service industry information inquiries); intelligent transportation location; wireless network system design and Resource management; billing for wireless network systems (determining the communication cost of certain locations according to the call rate), etc. [0003] There are usually two types of positioning implementations in the wireless network system: one is that the mobile user independently determines the geographic location through the measurement of wireless signals...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/02H04W64/00
Inventor 马子江李斐万建超
Owner ZTE CORP
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