METHOD AND TERMINAL FOR IMPLEMENTING A VOICE SERVICE

• US 20140071951A1
• Filed: 09/30/2013
• Published: 03/13/2014
• Est. Priority Date: 03/31/2011
• Status: Abandoned Application

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: LIU, Hai, JIN, Weisheng, WU, Xiaobo
• Application Number:
  US14/041,776
• Publication Number:
  US 20140071951A1
• Time in Patent Office: Days
• US Class Current: 370/332
• CPC Class Codes: H04W 36/0022 for transferring data sessions between adjacent core network technologies
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0254 detecting a user operation or a tactile contact or a motion of the device
• CPC Class Codes: H04W 60/005 Multiple registrations, e.g. multihoming
• 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

The present invention discloses a method for implementing a voice service in the embodiments of the present invention includes: a terminal attaches to a 2G/3G network and the 4G network through an MME on a 4G network; when a voice service does not need to be implemented, the CS transceiver of the terminal is in off state or static state; when a voice service needs to be implemented, for the terminal whose CS transceiver stays in off state, a CS fallback process needs to be triggered and turn on the CS transceiver to complete a voice service, for the terminal whose CS transceiver stays in static state, directly implementing a voice service through the 2G/3G network. The solution in embodiments of the present invention applies to a dual radio dual-mode terminal.

Claims

1. A method for implementing a voice service, comprising:

residing, by a terminal, in a cell on a 4G network;

sending, by the terminal, a combined attachment message or a combined location update message to a mobility management entity (MME) on the 4G network to attach to a 2G/3G network and the 4G network, wherein a circuit switched (CS) transceiver of the terminal is in off state;

sending, by the terminal, an extended service request message to the MME when a voice service needs to be implemented, so that the MME instructs that a base station on the 4G network needs to trigger a CS fallback;

receiving, by the terminal, a notification on measuring the 2G/3G network sent by the base station on the 4G network;

turning on, by the terminal, the CS transceiver, and measuring the 2G/3G network according to the notification; and

implementing, by the terminal, the voice service on the 2G/3G network according to a measurement result.

2. The method for implementing a voice service according to claim 1, wherein the implementing, by the terminal, the voice service on the 2G/3G network according to a measurement result comprises:

residing, by the terminal, to a cell on the 2G/3G network according to the measurement result, and implementing, by the terminal, a CS voice service.

3. The method for implementing a voice service according to claim 2, wherein the residing, by the terminal, to a cell on the 2G/3G network according to the measurement result, and implementing, by the terminal, a CS voice service comprises:

sending, by the terminal, a measurement report to the base station on the 4G network;

receiving, by the terminal, system information of a target cell on the 2G/3G network sent by the base station on the 4G network, wherein the target cell is selected by the base station on the 4G network according to the measurement report; and

residing, by the terminal, to the target cell on the 2G/3G network according to the system information, and implementing the CS voice service.

4. The method for implementing a voice service according to claim 1, wherein the implementing, by the terminal, the voice service on the 2G/3G network according to a measurement result comprises:

sending, by the terminal, a measurement report to the base station on the 4G network;

selecting, by the base station on the 4G network, a target cell on the 2G/3G network according to the measurement report, and sending, by the base station on the 4G network, a handover required message to the MME on the 4G network, wherein the handover required message carries an indication for performing a dual transceiver mode handover;

sending, by the MME, a handover forwarding message to a serving GPRS support node (SGSN) on the 2G/3G network, wherein the handover forwarding message carries the indication for performing a dual transceiver mode handover;

sending, by the SGSN, a handover request message to a base station controller (BSC) or a radio network controller (RNC), wherein the handover request message does not carry bearer in formation;

returning, by the BSC or the RNC, a handover answer message to the SGSN;

returning, by the SGSN, a handover forwarding response message to the MME;

sending, by the MME, a handover response message to the base station on the 4G network;

sending, by the base station on the 4G network, a handover response information to the terminal; and

accessing, by the terminal, the target cell on the 2G/3G network, and implementing, by the terminal, a CS voice service.

5. The method for implementing a voice service according to claim 1, wherein the implementing, by the terminal, the voice service on the 2G/3G network according to a measurement result comprises:

sending, by the terminal, a measurement report to the base station on the 4G network;

selecting, by the base station on the 4G network, a target cell on the 2G/3G network according to the measurement report, and sending, by the base station on the 4G network, a handover required message to the MME;

sending, by the MME, a packet switched (PS)-to-CS handover message to a mobile switching center (MSC);

returning, by the MSC, a PS-to-CS handover response message to the MME;

sending, by the MME, a handover answer message to the base station on the 4G network;

sending, by the base station on the 4G network, a handover response information to the terminal; and

accessing, by the terminal, the target cell on the 2G/3G network, and implementing, by the terminal, a CS voice service.

6. The method for implementing a voice service according to claim 1, wherein the notification on measuring the 2G/3G network contains cell information or frequency group information of the 2G/3G network, and does not contain a measurement gap configuration.

7. The method for implementing a voice service according to claim 1, wherein, before the receiving, by the terminal, a notification on measuring the 2G/3G network sent by the base station on the 4G network, the method further comprises:

sending, by the terminal, radio capability information to the base station on the 4G network, wherein the radio capability information contains dual-receiving and dual-sending capability indication information of a current terminal;

or

sending, by the terminal, network capability information to a core network of the 4G network, wherein the network capability information contains dual-receiving and dual-sending capability indication information of the terminal, so that the core network of the 4G network informs the base station on the 4G network of dual-receiving and dual-sending capability of the terminal.

8. A method for implementing a voice service, comprising:

residing, by a terminal, in a cell on a 2G/3G network and a cell on a 4G network at the same time;

sending, by the terminal, a combined attachment message or a combined location update message to a mobility management entity (MME) on the 4G network to complete combined attachment of the terminal to the 2G/3G network and the 4G network;

keeping residing, by the terminal, in the cell on the 2G/3G network when a voice service does not need to be implemented; and

implementing, by the terminal, the voice service through the 2G/3G network when the voice service needs to be implemented.

9. The method for implementing a voice service according to claim 8, wherein, after the residing, by the terminal, in the cell on the 2G/3G network, and before the combined attachment of the terminal to the 2G/3G network and the 4G network, the method further comprises:

reading, by the terminal, location area information location area identity (LAI) of the cell on the 2G/3G network where the terminal resides; and

the sending, by the terminal, the combined attachment message to the MME on the 4G network to complete the combined attachment of the terminal to the 2G/3G network and the 4G network comprises;

carrying, by the terminal, the LAI in the combined attachment message and sending the message to the MME, so that the MME selects a corresponding mobile switching center (MSC) on the 2G/3G network, and so that the MME sends the location update message to the MSC, so as to complete the combined attachment of the terminal to the 2G/3G network and the 4G network.

10. The method for implementing a voice service according to claim 8, wherein, after the residing, by the terminal, in the cell on the 2G/3G network, and before combined update to the 2G/3G network and the 4G network, the method further comprises:

selecting, by the terminal, a cell on the 2G/3G network, and reading, by the terminal, LAI of the selected cell; and

the sending, by the terminal, the combined location update message to the MME on the 4G network to complete the combined attachment of the terminal to the 2G/3G network and the 4G network comprises;

when the LAI of the selected cell is different from currently stored LAI of the terminal, carrying, by the terminal, the LAI of the selected cell in the combined location update message, and sending the message to the MME, so that the MME selects a corresponding mobile switching center MSC on the 2G/3G network, and so that the MME sends the location update message to the MSC, so as to complete the combined attachment of the terminal to the 2G/3G network and the 4G network.

11. A terminal, wherein the terminal is a dual-mode terminal, comprising:

a residing unit, configured to make the terminal reside in a cell on a 4G network;

an attaching unit, configured to send a combined attachment message or a combined location update message to a mobility management entity (MME) on the 4G network, so that the terminal performs combined attachment to a 2G/3G network and the 4G network, wherein a CS transceiver of the terminal is in off state;

a first sending unit, configured to send an extended service request message to the MME when a voice service needs to be implemented, so that the MME instructs that a base station on the 4G network needs to trigger a CS fallback;

a receiving unit, configured to receive a notification on measuring the 2G/3G network sent by the base station on the 4G network;

a starting unit, configured to turn on the CS transceiver and measure the 2G/3G network according to the notification; and

a voice unit, configured to implement the voice service on the 2G/3G network according to a measurement result.

12. The terminal according to claim 11, wherein the voice unit is configured to reside, according to the measurement result and implement a CS voice service, to a cell on the 2G/3G network.

13. The terminal according to claim 12, wherein the voice unit comprises:

a first sending module, configured to send a measurement report to the base station on the 4G network;

a first receiving module, configured to receive system information of a target cell on the 2G/3G network sent by the base station on the 4G network, wherein the target cell is selected by the base station on the 4G network according to the measurement report; and

a first voice module, configured to reside to the target cell on the 2G/3G network according to the system information and implement the CS voice service.

14. The terminal according to claim 11, wherein the voice unit comprises:

a second sending module, configured to send a measurement report to the base station on the 4G network, so that the base station on the 4G network selects a target cell on the 2G/3G network, and so that the 4G network triggers a dual radio mode handover;

a second receiving module, configured to receive a handover response message sent by the base station on the 4G network; and

a second voice module, configured to access the target cell on the 2G/3G network and implement a CS voice service.

15. The terminal according to claim 11, wherein the voice unit comprises:

a third sending module, configured to send a measurement report to the base station on the 4G network, so that the base station on the 4G network selects a target cell on the 2G/3G network, and so that the 4G network triggers a dual radio mode handover;

a third receiving module, configured to receive a handover response message sent by the base station on the 4G network; and

a third voice module, configured to access the target cell on the 2G/3G network and implement a CS voice service.

16. The terminal according to claim 11, further comprising:

a second sending unit, configured to send radio capability information to the base station on the 4G network, wherein the radio capability information contains dual-receiving and dual-sending capability indication information of a current terminal;

or

a third sending unit, configured to send network capability information to a core network of the 4G network, wherein the network capability information contains dual-receiving and dual-sending capability indication information of the terminal, so that the core network of the 4G network informs the base station on the 4G network of dual-receiving and dual-sending capability of the terminal.

17. A terminal, comprising:

a residing unit, configured to make the terminal reside in a cell on a 2G/3G network and in a cell on a 4G network at the same time;

an attaching unit, configured to send a combined attachment message or a combined location update message to a mobility management entity (MME) on the 4G network to complete combined attachment of the terminal to the 2G/3G network and the 4G network;

wherein

the residing unit is further configured to retain a residing state of the terminal in the cell on the 2G/3G network when a voice service does not need to be implemented; and

a voice unit, configured to implement the voice service through the 2G/3G network when the voice service needs to be implemented.

18. The terminal according to claim 17, further comprising:

a reading unit, configured to read location area information LAI of the cell on the 2G/3G where the terminal resides;

wherein

the attaching unit is specifically configured to carry the LAI in the combined attachment message and send the message to the MME, so that the MME selects a corresponding mobile switching center (MSC) on the 2G/3G network, and so that the MME sends the location update message to the MSC, so as to complete the combined attachment of the terminal to the 2G/3G network and the 4G network.

19. The terminal according to claim 17, further comprising:

a selecting unit, configured to make the terminal select a cell on the 2G/3G network and read LAI of the selected cell;

wherein

the attaching unit is specifically configured to, when the LAI of the selected cell is different from currently stored LAI of the terminal, carry the LAI of the selected cell in the combined location update message and send the message to the MME, so that the MME selects a corresponding mobile switching center MSC on the 2G/3G network, and so that the MME sends the location update message to the MSC, so as to complete the combined attachment of the terminal to the 2G/3G network and the 4G network.