TERMINAL, METHOD FOR OPERATING THE TERMINAL, AND METHOD FOR INTERWORKING IN WIRELESS COMMUNICATION SYSTEM INCLUDING 3GPP LTE NETWORK AND 3GPP LEGACY NETWORK

• US 20110122862A1
• Filed: 11/20/2009
• Published: 05/26/2011
• Est. Priority Date: 11/20/2009
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: YUN, Ji-Hoon, CHO, Ki-Ho, MOON, Ji-Cheol
• Granted Patent: US 8,559,417 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 68/00 User notification, e.g. alerting and paging, for incoming communication, change of service or the like
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A terminal, a method for operation of the terminal, and a method of interworking in a wireless communication system including an advanced network and a legacy network are provided. The method for operating the terminal includes monitoring a paging channel of the legacy network for a data paging message and a Circuit Switched (CS) paging message, when the terminal is in an idle state, receiving one of the CS paging message and data paging message, establishing a connection with the legacy network corresponding to the received one of the CS paging message and data paging message, wherein a CS voice connection is established with the legacy network if the CS paging message is received and a Packet Switched (PS) data connection is established with the legacy network if the data paging message is received, and performing a handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network.

Claims

1. A method for operating a terminal in a wireless communication system including an advanced network and a legacy network, the method comprising:

monitoring a paging channel of the legacy network for a data paging message and a Circuit Switched (CS) paging message, when the terminal is in an idle state after switching from an active state;

receiving one of the CS paging message and data paging message;

establishing a connection with the legacy network corresponding to the received one of the CS paging message and data paging message, wherein a CS voice connection is established with the legacy network if the CS paging message is received and a Packet Switched (PS) data connection is established with the legacy network if the data paging message is received; and

performing a handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network.

2. The method of claim 1, wherein the receiving of the one of the CS paging message and data paging message comprises receiving the CS paging message via the advanced network, when the terminal has an active connection to the advanced network.

3. The method of claim 1, further comprising performing location registration with the legacy network via the legacy network, when the terminal is in the idle state.

4. The method of claim 1, further comprising:

monitoring for a CS paging message when the terminal is connected to the advanced network;

transitioning to an idle state from a state where the terminal is connected to the advanced network; and

performing a handover from the advanced network to the legacy network upon transitioning to the idle state.

5. The method of claim 1, wherein the performing of the handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network, comprises:

if the PS data connection is established with the legacy network, determining if the terminal is in a coverage area of the advanced network; and

when the terminal is in a coverage area of the advanced network, performing the handover to the advanced network from the legacy network.

6. The method of claim 1, wherein the legacy network comprises a Wideband Code Division Multiple Access (WCDMA) network.

7. A terminal for use in a wireless communication system including an advanced network and a legacy network, the terminal comprising:

a transmitter for transmitting signals to the advanced network and the legacy network;

a receiver for receiving signals from the advanced network and the legacy network; and

a controller for controlling the transmitter and receiver, for controlling to monitor a paging channel of the legacy network for a data paging message and a Circuit Switched (CS) paging message, when the terminal is in an idle state after switching from an active state, for controlling to determine if one of the CS paging message and data paging message are received, for controlling, if one of the CS paging message and data paging message are received, for controlling to establish a connection with the legacy network corresponding to the received one of the CS paging message and data paging message, wherein a CS voice connection is established with the legacy network if the CS paging message is received and a Packet Switched (PS) data connection is established with the legacy network if the data paging message is received, and for controlling to perform a handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network.

8. The terminal of claim 7, wherein the received one of the CS paging message and data paging message comprises the CS paging message received via the advanced network, when the terminal has an active connection to the advanced network.

9. The terminal of claim 7, wherein the controller controls to perform a location registration with the legacy network via the legacy network, when the terminal is in the idle state.

10. The terminal of claim 7, wherein the controller controls to monitor for a CS paging message when the terminal is connected to the advanced network, controls to transition the terminal to an idle state from a state where the terminal is connected to the advanced network, and controls to perform a handover from the advanced network to the legacy network upon transitioning to the idle state.

11. The terminal of claim 7, wherein controller controls to perform the handover to the advanced network from the legacy network, if the PS data connection is established with the legacy network and if the terminal is in a coverage area of the advanced network.

12. The terminal of claim 7, wherein the legacy network comprises a Wideband Code Division Multiple Access (WCDMA) network.

13. A method for interworking in a wireless communication system including a terminal, an advanced network and a legacy network, the method comprising:

receiving, by the legacy network, one of a Circuit Switched (CS) voice call request and Packet Switched (PS) data for the terminal, when the terminal is in an idle state after switching from an active state;

transmitting to the terminal, by the legacy network, a CS paging message if the CS voice call request is received and a data paging message if the PS data is received;

receiving, by the terminal, one of the CS paging message and the data paging message while the terminal is in the idle state after switching from an active state;

establishing a connection for data service between the terminal and the legacy network, if the terminal receives the data paging message; and

performing an active handover of the connection for the data service between the terminal and the legacy network to a connection for the data service between the terminal and the advanced network.

14. The method of claim 13, further comprising:

receiving, by the legacy network, a Circuit Switched (CS) voice call request for the terminal, when the terminal has an active connection to the advanced network;

receiving, by the advanced network, a CS paging message for the terminal, when the terminal has an active connection to the advanced network;

tunneling, by the advanced network, the received CS paging message for the terminal through the advanced network;

transmitting, by the advanced network, the tunneled CS paging message to the terminal; and

establishing, by the terminal, a CS connection with the legacy network.

15. The method of claim 13, further comprising performing, by the terminal, location registration with the legacy network via the legacy network, when the terminal is in the idle state.

16. The method of claim 13, further comprising:

monitoring, by the terminal, for a CS paging message when the terminal is connected to the advanced network;

transitioning, by the terminal, to an idle state from a state where the terminal is connected to the advanced network; and

performing a handover from the advanced network to the legacy network upon transitioning to the idle state.

17. The method of claim 13, wherein the performing of the active handover of the connection for the data service between the terminal and the legacy network to the connection for the data service between the terminal and the advanced network comprises:

determining, by the terminal, if the terminal is in a coverage area of the advanced network; and

when the terminal is in a coverage area of the advanced network, performing the active handover of the connection for the data service between the terminal and the legacy network to the connection for the data service between the terminal and the advanced network.

18. The method of claim 13, wherein the legacy network comprises a Wideband Code Division Multiple Access (WCDMA) network.