A method for improving air signal transmission quality of CDMA system

An air transmission and system signal technology, applied in the field of wireless mobile communication signal transmission, can solve the problems of inconsistent arrival time, deterioration of signal transmission quality, etc., and achieve the effect of improving transmission quality

Inactive Publication Date: 2005-01-19
ZTE CORP
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a simple and effective method for improving the air transmission quality of CDMA system signals, by ensuring the time alignment of CDMA system signal forward service frames to overcome the inconsistency of arrival time of forward service frames in the prior art Issues that cause signal transmission quality to deteriorate

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  • A method for improving air signal transmission quality of CDMA system
  • A method for improving air signal transmission quality of CDMA system
  • A method for improving air signal transmission quality of CDMA system

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Embodiment Construction

[0024] Such as image 3 As shown, this figure is a flow chart of processing frame numbers at the BSC (base station controller) side of the present invention. In the processing of a certain forward service frame, the maximum time delay when the system sends the forward service frame is obtained through testing, and converted into the number B of frames. The processing of the service frame on the BSC side includes 3 steps. First, in step S101, the system time is obtained from the BSC, that is, the BSC sends a pilot signal so that the mobile stations in its coverage area can provide carrier phase to realize Coherent demodulation, after the mobile station demodulates the pilot signal, it can obtain the phase information of the short pseudo-code of the base station, demodulate the synchronization channel and obtain the basic system configuration parameter - system time, and convert the system time into a value from a certain starting time α From the number A of business frames up ...

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Abstract

The inventions provides a method of improving the aerial transmission quality of CDMA signals, assuring the alignment of forward service frame time of transmission signal in CDMA system, and its character: it includes the steps: obtaining system time on a base station controller BSC from any one service frame of the transmission signal and calculating a sequence number of the forward service frame; comparing the sequence number with an expected sequence number of forward service frame, calculated by the system time obtained by a base station transceiver BTS; judging whether to write the forward service frame in chips, discard or write in buffer region, thus assuring the strict alignment of transmission time of the forward service frame to improve the aerial transmission quality of the signal and aerial compensatory transmission quality.

Description

technical field [0001] The invention relates to a wireless mobile communication signal transmission method, in particular to a method for improving the air transmission quality of the CDMA system signal by ensuring the time alignment of the forward service frame of the CDMA system signal. Background technique [0002] In a CDMA system, BSC (Base Station Controller) and BTS (Base Transceiver Transceiver) are jointly responsible for sending forward traffic frames. In the case of soft handover, the BSC will send the same forward service frame to multiple BTSs at the same time. However, due to the delay on the signaling interface, as well as the network delay and processing delay on the BTS, the time when the BTS sends the service frame to the air is different. When the MS (mobile station) combines frames in the process of demodulating the signal, due to the existence of the above problems, the contents of the frames combined by the MS at the same time will be different, that i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/26H04J13/02H04W56/00
Inventor 丁梦蛟李宗政龙江凌勇
Owner ZTE CORP
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