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Method for judging base station emission technique type through terminal

A technology for base stations and terminals, applied in the field of judging the type of base station transmission technology by the terminal, can solve the problems of inability to expand cell coverage, performance degradation, slow speed, etc. Effect

Inactive Publication Date: 2008-12-10
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the following problems in the prior art: the benefits brought by the use of SCTD transmit diversity by the base station cannot be obtained, that is, the purpose of expanding the coverage of the cell cannot be achieved; the terminal only uses the signal Half the power of the standard channel will degrade the performance or reduce the coverage; the speed is slow and takes up a lot of network resources;

Method used

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  • Method for judging base station emission technique type through terminal
  • Method for judging base station emission technique type through terminal
  • Method for judging base station emission technique type through terminal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] to combine figure 1 ,Be explained. figure 1 is a flow chart of the method of the present invention. In this flowchart, the main flow of the method of the present invention is illustrated, which constitutes a complete technical solution for implementing the present invention, that is, it can complete the judgment made by the user terminal: whether the beacon channel uses the method of SCTD transmit diversity technology.

Embodiment 2

[0095] to combine figure 2 ,Be explained. figure 2 is a flowchart of receiving beacon channel signals.

[0096] In order to achieve the purpose of the terminal receiving the beacon channel signal, the following steps are performed:

[0097] 1. Initialization; the initialization includes entering or modifying the program in the terminal, and the terminal is in a working state when it is turned on;

[0098] 2. Receive the signal sent by the base station;

[0099] 3. Obtain downlink synchronization;

[0100] 4. Read the data in the beacon channel.

Embodiment 3

[0102] to combine image 3 ,Be explained. image 3 is a flow chart of receiving channel estimation.

[0103] For channel estimation, the following steps are implemented:

[0104] 1. Take out the training sequence data in the beacon channel;

[0105] 2. Detect the training sequence number used by the base station;

[0106] 3. Calculate the Fourier transform of the original training sequence used by the base station to obtain X;

[0107] 4. Calculate the Fourier transform of the training sequence received by the terminal to obtain Y;

[0108] 5. Divide the result of c3 by the result of c4 to obtain the result Z of this step, that is, X÷Y=Z;

[0109] 6. Invert the Fourier transform of the result of c5 to obtain U, that is, invert the Fourier transform of Z to obtain U;

[0110] The U is the result of channel estimation: h1, h2, ,,,,, h128.

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Abstract

The invention provides a method of judging base station transmitting technology type by the terminal, relating to the technical field of mobile communication. In order to solve the following problems in the prior art: not achieving the purpose of enlarging the cell covering range and other defects, the invention provides following technical proposal. A method of judging whether the beacon channel uses SCTD technology, comprising the following steps: a1. receiving the beacon channel signal by the terminal; a2. executing channel estimate; a3. calculating the channel estimate widow power Ph1 and Ph2; a4. comparing the former Ph1 and the latter Ph2+Ph; a5. if the comparing result in step a4 is the former greater than the latter, judging that the beacon channel signal does not use the SCTD technology; a6. if the comparing result in step a4 is the former less than or equal to the latter, judging that the beacon channel signal uses the SCTD technology. The invention has the advantages of capable of obtaining the advantage of the base station using the SCTD transmitting diversity, achieving the purpose of enlarging the cell covering range and not needing to modify the standard and so on.

Description

technical field [0001] The present invention relates to the technical field of wireless mobile communication, in particular to a method for judging the transmission technology type of a base station by a terminal. Background technique [0002] The TDD (Time Division Duplex) working mode of the third-generation mobile communication system is divided into two chip rates of 3.84Mcps (commonly known as TD-CDMA or HCR) and 1.28Mcps (commonly known as TD-SCDMA or LCR). [0003] In the TDD system, physical channels located at beacon locations (Beacon Location) are collectively referred to as beacon channels (Beacon Channel). The transmit power level of the beacon channel is constant, which is called a reference power level (Reference Power Level). The beacon channel sent by the TDD base station can use SCTD (SpaceCode Transmit Diversity) transmit diversity technology (see international standard 3GPP TS25.221 and TS25.224) to improve the quality of the beacon channel received by th...

Claims

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Application Information

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IPC IPC(8): H04Q7/38H04B7/26H04B7/04H04B1/707
Inventor 孙飞雪
Owner MEDIATEK INC