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Synchronization method applied for WCDMA system same frequency multi-cell weak power base station

A base station synchronization, multi-cell technology, applied in the communication, synchronization devices, electrical components and other directions between multiple stations, can solve problems such as the inability to stably track and launch, and achieve the effect of improving stability

Inactive Publication Date: 2011-01-26
COMBA TELECOM SYST (GUANGZHOU) LTD
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Problems solved by technology

However, in practical applications, due to the influence of additive white Gaussian noise, the elements of the base station with weaker transmission power in the set of candidate base stations sometimes disappear with time, making it impossible for the user equipment to track the base station with weaker transmission power stably

Method used

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  • Synchronization method applied for WCDMA system same frequency multi-cell weak power base station
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  • Synchronization method applied for WCDMA system same frequency multi-cell weak power base station

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Embodiment Construction

[0040] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited to the embodiments.

[0041] As shown in Figure 3, the specific implementation process of the weak power base station synchronization method applied to the same frequency and multiple cells in the WCDMA system is as follows:

[0042] Taking the data of the nth frame as an example, it means that the data of the nth frame passes through the time synchronization module 301 to perform operations such as time slot synchronization, frame synchronization, code group determination, and scrambling code determination, and the time synchronization module outputs the candidate base station set. A nRepresent; the data of the n-1th frame passes through parameter measurement module 302, carries out PCIPCH channel Ec / Io (Ec refers to the chip energy of pilot channel; Io refers to interference power sp...

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Abstract

The invention provides a synchronization method for a shared-frequency multi-cell and weakening-power base station of a WCDMA (Wideband Code Division Multiple Access) system, comprising the following steps: the n-th frame data outputs candidate base station sets An by a time synchronization module; the n-1-th frame data measures a PCIPCH channel (primary common pilot channel) Ec / Io by a parametermeasurement module and carries out judgment to obtain activating base station sets Bn-1 (n-1 is subscript) according to the Ec / Io; the Bn-1 merges with the An to obtain sets to be measured Cn (n is subscript), firstly by delaying time of a frame module timelag and secondly the candidate sets; and the parameter measurement module measures the elements in the Cn in a way of PCIPCH channel Ec / Io andobtains the activating base station sets Bn (n is subscript) by judging according to the Ec / Io, thereby completing the multi-cell synchronization of n-th frame data. The invention improves the stability for tracing the weakening-power base station by adopting a feedback mechanism, and can be applicable to the downlink receiver such as a user terminal, a drive test device, an intelligent repeater and the like, and the trace of weakening-power base station in a single cell.

Description

technical field [0001] The invention relates to a cell synchronization technology of a WCDMA system, in particular to a method for synchronizing weak-power base stations of multiple cells of the same frequency in the WCDMA system. Background technique [0002] In a mobile communication system, when initially accessing, user equipment needs to obtain time synchronization and frequency synchronization with a certain cell through a synchronization search process. WCDMA system cell search adopts asynchronous operation. During the cell search process, the user equipment searches for a cell and determines the downlink scrambling code, frame synchronization and frequency synchronization of this cell. [0003] The physical channels related to WCDMA downlink synchronization include primary synchronization channel PSCH, secondary synchronization channel SSCH and downlink common pilot channel PCPICH. The synchronization channel SCH includes an orthogonal primary synchronization chann...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/26H04W56/00
Inventor 施英
Owner COMBA TELECOM SYST (GUANGZHOU) LTD
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