Connection controlling method of bimodule mobile communication terminal

Abstract

The invention provides a connection controlling method of bimodule mobile communication terminal, comprising following steps: system initialization; primary mode system connection; secondary mode system connection, switching the RF path towards the secondary mode system when connection is failed in the primary mode system connection, closing the primary mode system during connection by secondary mode system trying to connect the mobile communication system, repeating the operation from the primary mode system connection step when connection is failed. The invention can shorten the connection time and roaming time of the bimodule mobile communication terminal which can accept two kinds of mobile communication service.

Description

technical field [0001] The present invention relates to a connection control method for a dual-mode (DBDM: Dual Band Dual Mode) mobile communication terminal, and more specifically, relates to a dual-mode mobile communication terminal that can shorten the initial boot time of mobile communication services that can accept two modes. A connection control method for a dual-mode mobile communication terminal that shortens roaming time to mutually different mobile communication systems. Background technique [0002] There are synchronous CDMA2000 (Code Division Multiple Access) scheme and asynchronous WCDMA (Wideband Code Division Multiple Access) scheme as methods for realizing the current IMT-2000. Among them, the synchronous CDMA2000 network has been built in South Korea, and the asynchronous WCDMA network will be constructed in the future. [0003] The CDMA2000 network provides services for the whole country, so the coverage is wide. If the EV (Evolution)-DO (Data Only) met...

AI Technical Summary

Problems solved by technology

[0008] That is, in a dual-mode mobile communication terminal, if the initial synchronization between the favorite main mode system and the mobile communication system fails, before switching to another mode (such as CDMA2000 or CDMA) system, it must go through the favorite mode (for example, WCDMA) system. Initialization time such as booting, initial synchronization acquisition time, and initial synchronization acquisition time with other mode systems, that is, the slave mode system is driven and initialized for conversion to slave mode (such as CDMA2000 or CDMA), after the initial synchronization acquisition time has elapsed , to obtain mobile communication services, resulting in serious service delays

[0009] In addition, in the boundary area between the two mobile communication service systems, when the roaming procedure of the mobile communication terminal is performed, after the system in the connection mode is terminated, the boot and initialization of the system in the roaming target mode are separately performed, so there is a problem of signal interruption.

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