Multi-mode multi-band mobile communication terminal and mode switching method thereof
AssigneeSK Telecom Co., Ltd.
InventorsNam-Gun Kim, Young-Lak Kim, Hyun-Wook Kim, Chang-Moon Han
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Abstract
Disclosed is a multi-mode multi-band mobile communication terminal and a mode switching method thereof wherein a mode switching can be performed between an asynchronous network and a synchronous network by minimizing interruption in communication. According to the switching method of a multi-mode multi-band mobile communication terminal, the power of a signal received from an asynchronous network or a synchronous network is measured and the measured power of the received signal drives a modem portion, thereby switching the mode of the mobile communication terminal.
Claims24
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode in an idle state, the multi-mode multi-band mobile communication terminal including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network, the method comprising the steps of:
- (1) measuring a power of a received signal from the asynchronous mobile communication network;
- (2) determining if the measured power of the received signal has a value lower than a preset threshold value;
- (3) determining if a state in which the measured power of the received signal has a value lower than a preset threshold value is maintained during a predetermined time interval;
- (4) operating the synchronous modem when the state has been maintained during a predetermined time interval;
- and (5) converting a current communication mode into a synchronous mode and then entering into a synchronous mode idle state.
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode in a traffic state, the multi-mode multi-band mobile communication terminal including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network, the method comprising the steps of:
- (1) measuring a power of a received signal from the asynchronous mobile communication network;
- (2) determining if the measured power of the received signal has a value lower than a preset threshold value;
- (3) determining if a state in which the measured power of the received signal has a value lower than a preset threshold value is maintained during a predetermined time interval;
- (4) operating the synchronous modem when the state has been maintained during a predetermined time interval;
- (5) determining if a traffic state of an asynchronous mode call has ended or not;
- (6) determining if a radio link with the asynchronous mobile communication network has been released or not when it is determined that the traffic state of the asynchronous mode call has not ended yet;
- and (7) converting a current communication mode into a synchronous mode and processing a synchronous mode call with the synchronous mobile communication network through the synchronous modem when it is determined that the radio link with the asynchronous mobile communication network has been released.
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode, the mobile communication terminal including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network, the method comprising the steps of:
- (1) monitoring system information from the asynchronous mobile communication network;
- (2) checking preset parameter values against the monitored system information in order to determine whether to perform mode switching;
- (3) operating the synchronous modem when it is determined that the preset parameter values require mode switching;
- and
- (4) switching into the synchronous mode after operating the synchronous modem.
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode, the mobile communication terminal including an asynchronous modem for communication with an asynchronous mobile communication network and a synchronous modem for communication with a synchronous mobile communication network, the method comprising the steps of:
- (1) searching overhead message information from the synchronous mobile communication network;
- (2) determining if the overhead message information includes a preset mode switch parameter for mode switching;
- (3) operating the asynchronous modem when it is determined that the overhead message information includes a preset mode switch parameter;
- and (4) switching a communication mode of the mobile communication terminal into the asynchronous mode after operating the asynchronous modem.
(canceled)
A method for mode switching of a multi-mode multi-band mobile communication terminal between an asynchronous mode and a synchronous mode, the mobile communication terminal including modems for communication with an asynchronous mobile communication network and a synchronous mobile communication network, the method comprising the steps of:
- (1) operating a corresponding modem for connection with a target mobile communication network which is a target of mode switching, when it is determined to perform the mode switching;
- (2) acquiring a network sync with the target mobile communication network by the corresponding modem;
- (3) performing registration of location to the target mobile communication network;
- and (4) performing communication with the target mobile communication network through the corresponding modem and deactivating another modem having been communicating with another mobile communication network.
(canceled)
24-35. (canceled)
Dependencies are inferred from the claim text.