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Method and apparatus of acquiring time information in a mobile communication terminal

A technology of mobile communication terminal and time information, which is applied in wireless communication, communication between multiple stations, radio transmission system, etc. Time and other issues

Inactive Publication Date: 2007-10-03
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the CDMA system sends exact time information to the mobile communication terminal, the WCDMA system may not send time information to the mobile terminal, or may send inaccurate time information
Therefore, it is difficult for a mobile communication terminal to accurately maintain its time when operating in WCDMA
[0009] In addition, in a mobile communication terminal supporting GSM / GPRS (General Packet Radio Service), since the GSM / GPRS system does not provide time information, the user must manually set the time of the mobile communication terminal

Method used

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  • Method and apparatus of acquiring time information in a mobile communication terminal
  • Method and apparatus of acquiring time information in a mobile communication terminal
  • Method and apparatus of acquiring time information in a mobile communication terminal

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Embodiment Construction

[0023] Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, well-known functions and constructions are not described in detail since they would unnecessarily obscure the invention.

[0024] Hereinafter, a method for obtaining time information from a CDMA system in a mobile communication terminal will be described in more detail according to the present invention. The CDMA system is a synchronous system, and transmits exact time information to mobile communication terminals.

[0025] 2A and 2B are block diagrams of mobile communication terminals each compatible with different mobile communication systems according to the present invention. Referring to FIG. 2A, the mobile communication terminal includes at least one modem chip supporting a single communication method so that the mobile communication terminal can be used for at least one communication method. Referring to FIG. 2B, the ...

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Abstract

Provided is a method and apparatus for acquiring time information from a CDMA system in a mobile communication terminal. The method includes: searching for a CDMA channel in a predetermined manner when a CDMA modem or module is activated; receiving a sync channel signal via the searched CDMA channel and extracting time information from the sync channel signal; and setting a time of the mobile communication terminal using the extracted time information. Therefore, even when the mobile communication terminal communicates with a system that does not provide time information, the mobile communication terminal can precisely maintain its time by acquiring time information from a CDMA system.

Description

[0001] priority [0002] This application claims the benefit of priority from an application assigned Serial No. 2006-29421 filed with the Korean Intellectual Property Office on March 31, 2006, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates generally to mobile communication terminals, and in particular, the present invention relates to a method and apparatus for obtaining time information from a synchronous system such as a Code Division Multiple Access system. Background technique [0004] The second generation (2G) mobile communication systems and methods mainly relate to voice services, and include Global System for Mobile Communications (GSM) and Interim Standard 95 (IS-95). Since 1992, GSM services have been commercialized mainly in Europe. GSM services are based on the Time Division Multiple Access (TDMA) method. IS-95 services using a Code Division Multiple Access (CDMA) method have been commerciali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38H04B7/26H04B1/707H04W24/00H04W48/16H04W56/00H04W72/00
CPCH04W48/16H04B2201/70709H04W72/00H04B7/2668H04W24/00H04W56/00H04L7/00
Inventor 徐种源
Owner SAMSUNG ELECTRONICS CO LTD
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