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Method for searching initial cell of mobile terminal

A mobile terminal and cell search technology, applied in the field of cell search, can solve problems such as time and battery waste, and achieve the effects of reducing battery consumption, speeding up search speed, and shortening the time used

Inactive Publication Date: 2009-09-30
SAMSUNG ELECTRONICS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Before searching for a suitable cell, many other PLMN frequencies may be searched. In many cases, this is just a waste of time and battery

Method used

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  • Method for searching initial cell of mobile terminal
  • Method for searching initial cell of mobile terminal
  • Method for searching initial cell of mobile terminal

Examples

Experimental program
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Embodiment Construction

[0031] In an exemplary embodiment according to the present invention, the mobile terminal sets a frequency list for its HPLMN (and its EPLMN), UPLMN, and OPLMN respectively, and these frequency lists are stored in the mobile terminal, respectively containing some frequency values. If a cell of a certain PLMN is found on a certain frequency, the value of the frequency is saved in the frequency list corresponding to the PLMN. If the mobile terminal user manually selects another PLMN, a corresponding frequency list is also established for this PLMN.

[0032] Every time the mobile terminal performs a cell search, if a certain PLMN has a corresponding frequency list and finds a cell belonging to the PLMN on a frequency that is not in the frequency list, it will automatically add the frequency to the frequency list. .

[0033] If the SIM card is replaced, the mobile terminal will automatically clear all saved frequency lists, and establish an initially empty frequency list for the ...

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PUM

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Abstract

The invention provides a method for searching an initial cell of a mobile terminal, which comprises the following steps: selecting a PLMN from a PLMN list by the mobile terminal, and establishing a frequency list corresponding to the cell in the PLMN; and searching a suitable cell on the basis of the frequency list of the selected PLMN. The method improves the prior mode for searching the initial cell of the mobile terminal to shorten the time for searching the initial cell, improve the searching speed, and reduce the battery consumption of the mobile terminal.

Description

technical field [0001] The invention relates to a cell search method in the field of mobile communication, in particular to a method for initial cell search of a mobile terminal. Background technique [0002] A mobile terminal is a portable device used for data transmission or wireless communication while moving. Mobile terminals include cellular phones, Personal Digital Assistants (PDAs), Personal Communication Services (PCS) phones, International Mobile Telecommunications-2000 (IMT-2000) terminals, Global System for Mobile Communications (GSM) terminals, and the like. When the mobile terminal is powered on or retrieves the network after losing coverage, the mobile terminal will select a public land mobile network, that is, PLMN (Public Land Mobile Network). To achieve this purpose, the mobile terminal maintains a list of PLMNs, and these lists arrange the PLMNs according to their priorities. The selection of PLMN has two modes, automatic and manual. During automatic net...

Claims

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Application Information

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IPC IPC(8): H04W48/16H04W48/18
CPCY02D30/70
Inventor 毛兵成
Owner SAMSUNG ELECTRONICS CO LTD
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