Dual-mode mobile terminal and method for handover of packet service call between different communication networks

• US 20070014260A1
• Filed: 01/31/2006
• Published: 01/18/2007
• Est. Priority Date: 07/15/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Seo, Jong-Won
• Granted Patent: US 8,107,432 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 52/028 switching on or off only a part of the equipment circuit blocks
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A dual-mode mobile terminal and method for performing PS call between different communication networks. In the mobile terminal, a second communication module which communicates with a second communication network, prepares for its operation and enters into a low power mode when it is requested for the PS call through a first communication module communicating with a first communication network. When the mobile terminal moves from the first communication network to the second communication network, the second communication module performs an initialization for the PS call to the second communication network. When the initialization is complete, the second communication module interrupts the PS call through the first communication network and performs a packet service communication through the first communication network.

Claims

1. A dual-mode mobile terminal for performing a handover for a packet service call between first and second communication networks, the dual-mode mobile terminal comprising:

a first communication module for receiving packet service data through the first communication network, the first communication module being connected to and capable of communicating with the first communication network; and

a second communication module for communicating with the second communication network and being in a disabled state,

wherein the first communication module commands the second communication module to prepare for operation and enter into a low power mode, when a packet service call is requested, and commands the second communication module to initialize for a packet service communication, after receiving a handover message from the first communication network when an event for the handover occurs.

2. The dual-mode mobile terminal as claimed in claim 1, further comprising an application processor for requesting the packet service call of the first communication module.

3. The dual-mode mobile terminal as claimed in claim 1, wherein the event for the handover is one of an entry into the second communication network and a reception of an optimal signal from the first communication network.

4. The dual-mode mobile terminal as claimed in claim 1, wherein the second communication module informs the first communication module of completion of the initialization, after completing the initialization, and

wherein the first communication module commands the application processor to perform the handover in order for the application processor to receive packet service data through the second communication module, after receiving the information of the initialization from the second communication module.

5. The dual-mode mobile terminal as claimed in claim 1, wherein the second communication module receives packet service data corresponding to the packet service call through the second communication network, after initialization for the packet service communication.

6. The dual-mode mobile terminal as claimed in claim 1, wherein the second communication module informs the first communication module of a completion of the initialization after completing the initialization of the second communication module, and

wherein the first communication module interrupts the packet service communication with the first communication network and enters into a low power mode, after receiving the information of the initialization of the second communication module.

7. The dual-mode mobile terminal as claimed in claim 1, wherein the second communication module stores an IP address and a port number assigned to the second communication module during the initialization.

8. A method of performing a handover of a packet service call between first and second communication networks using a dual-mode mobile terminal including a first communication module for communicating with a first communication network and a second communication module for communicating with a second communication network, the method comprising the steps of:

receiving packet service data through the first communication network in the first communication module;

commanding the second communication module to prepare for an operation and to enter into a low power mode;

receiving in the first communication module a handover message from the first communication network, after an event for the handover occurs; and

commanding the second communication module to initialize for a packet service communication.

9. The method as claimed in claim 8, wherein the event for the handover is one of an entry into the second communication network and a reception of an optimal signal from the first communication network.

10. The method as claimed in claim 8, further comprising the steps of:

performing an initialization for the packet service communication in the second communication module; and

receiving packet service data corresponding to the packet service call through the second communication network.

11. The method as claimed in claim 8, further comprising the steps of:

informing the first communication module of a completion of the initialization, after the second communication module completes the initialization;

interrupting the packet service communication with the first communication network by the first communication module; and

switching the first communication module into a low power mode.

12. The method as claimed in claim 8, further comprising the steps of:

assigning an IP address and a port number to the second communication module, after the second communication module performs the initialization for the packet service communication; and

storing the assigned IP address and the assigned port number.