Method and device for obtaining synchronization timing of GSM neighboring cell

A technology for synchronizing timing and neighboring cells, applied in the directions of synchronizing devices, electrical components, wireless communication, etc., it can solve the problems of long synchronizing timing, false detection of channel environment changes, and missed detection of SCH training sequences, so as to reduce calculation and judgment. time, reducing the time for subsequent calculations and judgments, and the effect of saving time

Active Publication Date: 2011-11-16
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
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  • Claims
  • Application Information

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Problems solved by technology

[0020] In view of this, the present invention provides a method for synchronous timing of GSM adjacent cells to solve the problems of long time-consuming synchronous timing and false detection or missed detection of SCH training sequences due to relatively fast channel environment changes in the prior art

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  • Method and device for obtaining synchronization timing of GSM neighboring cell
  • Method and device for obtaining synchronization timing of GSM neighboring cell
  • Method and device for obtaining synchronization timing of GSM neighboring cell

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Embodiment Construction

[0053]The basic idea of ​​the present invention is: use TD-SCDMA idle time to receive the information sequence of GSM neighboring cells, correlate the predicted SCH sequence with the received information sequence while receiving the information sequence, calculate the threshold value and judge Whether the latest 64 information units are the training sequence of the SCH sequence, when it is determined that the SCH sequence is received, receive the subsequent 39 remaining information units; decode the SB sequence, and determine the starting position of the SB sequence relative to the The timing deviation of the starting position of the information sequence; the synchronization timing of the GSM neighboring cell is obtained according to the timing deviation.

[0054] In order to clearly illustrate the technical solutions of the present invention, preferred embodiments are given below and detailed descriptions are given in conjunction with the accompanying drawings.

[0055] Pleas...

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Abstract

The invention discloses a method for obtaining the synchronization timing of a GSM neighboring cell in a TD-SCDMA / GSM double-module system. The method comprises the following steps: the characteristic of good relevance of an SCH training sequence is utilized to obtain the synchronization timing of the GSM neighboring cell, UE utilizes the idle time of TD-SCDMA to receive the SCH sequence of the GSM neighboring cell, when the SCH sequence is received, the correlation is conducted on the received information sequence by taking 64 bit as unit till the obtained correlate valve is larger than a threshold value, the UE receives the subsequent 39 bit information sequence, then the latest received 142 bit information is taken as the SCH sequence to conduct subsequent decoding, determine the timing deviation, and obtain the synchronization timing. The invention also discloses a device for realizing the method, which comprises an idle time monitoring unit, an information sequence receiving unit, a correlation calculation unit, a threshold value calculation unit, a comparing unit, a decoding unit and a timing deviation obtaining unit. By adopting the method and the device, the time consumption of the synchronization timing of the GSM neighboring cell is greatly reduced, and the probability of false detection and missing detection is reduced.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a method and a device for obtaining synchronous timing of GSM adjacent cells in a TD-SCDMA / GSM dual-mode system. Background technique [0002] In the TD-SCDMA / GSM dual-mode system, when in the TD-SCDMA mode, it is necessary to synchronize the GSM neighboring cells and confirm their Base Station Identify Code (BSIC) to ensure that they are close to the GSM Cell reselection or handover success. [0003] The GSM system controls the multiframe as a 51 multiframe structure, and its structure diagram is as follows figure 1 , where F represents the frame where the frequency correction channel is located (Frequency Correction Channel, FCCH for short), S represents the frame where the synchronization channel is located (Synchronization Channel, SCH), and B represents the frame where the broadcast control channel is located (Broadcast control channel, BCCH for short) ), C represents...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00H04W88/06
Inventor 王华华李贵勇陈路王鹏王丹刘宇
Owner SPREADTRUM COMM (SHANGHAI) CO LTD
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