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Method and apparatus for cell search

A cell search and frequency point technology, applied in the field of cell search, can solve the problems of too many frequency points and long search time, and achieve the effect of reducing the frequency point sorting time, improving the speed and saving power.

Inactive Publication Date: 2009-09-23
ST ERICSSON SEMICON BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a cell search method and device to solve the problems in the prior art that there are too many frequency points to be sorted and the search takes a long time

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  • Method and apparatus for cell search
  • Method and apparatus for cell search

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Please refer to figure 1 , is a flow chart of the cell search method in the embodiment of the present invention. This embodiment is described by taking the TD-SCDMA system as an example. Those skilled in the art can easily understand that the present invention can also be applied to other wireless communication systems. The cell search method includes the following steps:

[0051] Step 101. Divide the search bandwidth into multiple frequency bands.

[0052] In the TD-SCDMA system, the width of the divided frequency band is preferably 1.6 MHz, and it is assumed that the search bandwidth is divided into N frequency bands.

[0053] Step 102: Roughly sort the frequency bands according to the signal power of the frequency bands, and save the rou...

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Abstract

The invention discloses one area index method and device, which comprises the following steps: a, dividing the index wide band into multiple sections for rough ranking on frequency signals power and to store its list; b, judging whether the rough rank is zero, if yes, failure ending; if not, selecting strongest one and processing fine listing according to the frequency point power; c, according to list results on order from high to low for loading; if successful, the index succeeds and ends; if not then updating order and going back to step b.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a cell search method and device. Background technique [0002] In a wireless communication system, after the mobile terminal is turned on, it first needs to search the network, log in to the cell, and keep in sync with the data stream sent by the transmitter before proceeding to the next data transmission. The process of searching for networks and cells is called cell search. How to quickly search for a cell and log in to a high-quality cell is a key part directly related to communication speed and communication quality. [0003] The methods of cell search include frequency point sequence browsing method and frequency point sorting method. The frequency point sequential browsing method is to try to log in all the frequency points in the whole frequency band in turn according to the known frequency band information, and the search process is not ended ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/707H04B1/7083H04W48/16
Inventor 牟秀红
Owner ST ERICSSON SEMICON BEIJING
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