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Method, system and device for positioning mobile terminal

A mobile terminal and location information technology, applied in electrical components, wireless communication, etc., can solve problems such as cumbersome implementation process, inability to locate mobile terminals, and poor positioning accuracy

Active Publication Date: 2009-04-01
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the A-GPS positioning method requires both the network and the mobile terminal to be able to receive GPS information, it is necessary to expand the air interface function and make major changes to the mobile terminal and the network. Similarly, in special cases, if the mobile terminal If the GPS information cannot be received, the mobile terminal cannot be positioned
[0007] To sum up, it can be seen that when using the above-mentioned existing mobile terminal positioning technology to locate a mobile terminal, the positioning accuracy is poor, or the function of the air interface needs to be expanded, the implementation process is cumbersome, or the mobile terminal needs to be modified, or the mobile terminal needs to be active. Initiate positioning instead of the network side actively initiate positioning, so that the positioning of the mobile terminal lacks flexibility

Method used

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  • Method, system and device for positioning mobile terminal
  • Method, system and device for positioning mobile terminal
  • Method, system and device for positioning mobile terminal

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Experimental program
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Embodiment Construction

[0059] Before describing in detail the method for locating a mobile terminal provided by the present invention, a brief description will be made of the random access process of the mobile terminal in the TD_SCDMA system involved in the method of the present invention.

[0060] refer to figure 1 The schematic diagram of the random access process of the TD_SCDMA system is shown, wherein, in the TD_SCDMA system, the time slot positions between each base station are kept strictly synchronized, and the network side configures a unique SYNC_DL (Synchronous_DownLink, downlink synchronization code), each SYNC_DL corresponds to 8 SYNC_UL (Synchronous_UpLink, uplink synchronization code); and the SYNC_DL of each cell is different, and the 8 SYNC_ULs of each cell are also different. The random access process is divided into the following steps:

[0061] When the base station on the network side initiates a service paging to the mobile terminal or the mobile terminal actively initiates a...

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Abstract

The invention discloses a method of positioning mobile terminals, a system and a device, for realizing positioning on the mobile terminal initiated at the network side under the condition of not increasing air interface flow and not changing the mobile terminal. The method comprise that: a resident base station detects up syn codes transmitted by the mobile terminal according to the down syn codes in the process of performing access randomly of the mobile terminal to the resident base station; at least two adjacent base stations respectively detects the up syn codes transmitted by the mobile terminal according to the down syn codes of the resident base station, and determines the synchronization adjustment information corresponding to the adjacent stations; according to the synchronization adjustment information of each base station, difference between every two base stations with the mobile terminal is determined; position information of the mobile terminal is determined by the position information of each base station.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to the technology for positioning a mobile terminal on a network side. Background technique [0002] The mobile terminal positioning service is an important service in the wireless cellular communication system. The mobile terminal positioning technologies in the third-generation wireless communication system mainly include the following types: single base station smart antenna positioning, CELL_ID (Cell Identifier, cell positioning), OTDOA ( Observe Time Difference Of Arrival (Observe Time Difference Of Arrival) and A-GPS (Assisted Global Positioning System, Assisted Global Positioning System). [0003] In the single-base station smart antenna positioning technology, the base station obtains the azimuth information of the signal transmitted by the mobile terminal through the smart antenna. At the same time, the timing advance reported by the mobile terminal and...

Claims

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Application Information

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IPC IPC(8): H04W40/20
Inventor 梁志科马骁姜勇
Owner DATANG MOBILE COMM EQUIP CO LTD
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