Multimode Handover Method and Multimode Terminal

• US 20140011499A1
• Filed: 09/10/2013
• Published: 01/09/2014
• Est. Priority Date: 02/28/2012
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: He, Chunyong, Chen, Xiaojun
• Granted Patent: US 9,357,465 B2
• Time in Patent Office: Days
• US Class Current: 455/436
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/0085 Hand-off measurements
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 36/32 by location or mobility data, e.g. speed data

Abstract

A multimode handover method and a multimode terminal are disclosed. A multimode terminal obtains a CINR value and an RSSI value of a current signal in a first communication mode and determines whether the CINR value and the RSSI value both meet a preset switching condition. If they do, a current movement speed of the multimode terminal is obtained a switching delay is selected according to the movement speed, a second communication mode is switched into according to the selected delay, and communications use the second communication mode.

Claims

1. A multimode handover method, comprising:

obtaining, by a multimode terminal, a carrier to interference plus noise ratio (CINR) value and a received signal strength indicator (RSSI) value of a current signal in a first communication mode;

determining whether the CINR value and the RSSI value both meet a preset switching condition; and

if the CINR value and the RSSI value both meet the preset switching condition, obtaining a current movement speed of the multimode terminal, selecting a switching delay according to the movement speed, switching to a second communication mode according to the selected switching delay, and communicating by using the second communication mode.

2. The method according to claim 1, wherein selecting the switching delay comprises:

determining whether or not the movement speed is greater than or equal to a preset speed threshold;

if the movement speed is greater than or equal to the preset threshold, selecting a preset first delay as the switching delay; and

if the movement speed is not greater than or equal to the preset speed threshold, selecting a preset second delay as the switching delay, wherein the first delay is greater than the second delay.

3. The method according to claim 2, wherein switching to the second communication mode according to the selected switching delay comprises:

starting timing after the delay is selected; and

switching to the second communication mode when the selected switching delay expires.

4. The method according to claim 3, wherein switching to the second communication mode when the selected switching delay expires comprises:

when the selected switching delay expires, determining whether the CINR value and the RSSI value always meet the preset switching condition within the selected switching delay; and

if the CINR value and the RSSI value always meet the preset switching condition within the selected switching delay, switching to the second communication mode.

5. The method according to claim 1, where determining whether the CINR value and the RSSI value both meet a preset switching condition comprises:

determining whether the CINR value is greater than or equal to a preset CINR threshold and whether the RSSI value is greater than or equal to a preset RSSI threshold.

6. A multimode terminal, comprising:

a first obtaining module, configured to obtain a carrier to interference plus noise ratio (CINR) value and a received signal strength indicator (RSSI) value of a current signal in a first communication mode;

a judging module, configured to determine whether the CINR value and the RSSI value both meet a preset switching condition;

a second obtaining module, configured to obtain a current movement speed of the multimode terminal after the judging module determines that the CINR value and the RSSI value both meet the preset switching condition;

a selecting module, configured to select a switching delay according to the movement speed obtained by the second obtaining module; and

a switching module, configured to switch to a second communication mode according to the delay selected by the selecting module and to communicate using the second communication mode.

7. The terminal according to claim 6, wherein the selecting module comprises:

a judging unit, configured to determine whether the movement speed obtained by the second obtaining module is greater than or equal to a preset speed threshold;

a first selecting unit, configured to select a preset first delay as the switching delay after the judging unit determines that the movement speed is greater than or equal to the preset speed threshold; and

a second selecting unit, configured to select a preset second delay as the switching delay after the judging unit determines that the movement speed is less than the preset speed threshold, wherein the first delay is greater than the second delay.

8. The terminal according to claim 7, wherein the switching module comprises:

a switching unit, configured to start timing after the selecting module selects the delay and to switch to the second communication mode when the delay selected by the selecting module expires.

9. The terminal according to claim 8, wherein the judging module is specifically configured to determine whether the CINR value and the RSSI value obtained by the first obtaining module always meet the preset switching condition within the delay selected by the selecting module, when the selected delay expires;

and

wherein the switching module is further configured to switch to the second communication mode after the judging module determines that the CINR value and the RSSI value always meet the preset switching condition within the delay selected by the selecting module.

10. The terminal according to claim 6, wherein the judging module is specifically configured to determine whether the CINR value is greater than or equal to a preset CINR threshold and whether the RSSI value is greater than or equal to a preset RSSI threshold.

11. A multimode handover method, comprising:

obtaining, by a multimode terminal, a carrier to interference plus noise ratio (CINR) value and a received signal strength indicator (RSSI) value of a current signal in a first communication mode, wherein the CINR value and the RSSI value both meet a preset switching condition;

obtaining a current movement speed of the multimode terminal;

selecting a switching delay according to the movement speed;

switching to a second communication mode according to the selected switching delay; and

communicating by using the second communication mode.

12. The method according to claim 11, wherein selecting the switching delay comprises:

determining whether or not the movement speed is greater than or equal to a preset speed threshold;

when the movement speed is greater than or equal to the preset threshold, selecting a preset first delay as the switching delay; and

when the movement speed is not greater than or equal to the preset speed threshold, selecting a preset second delay as the switching delay, wherein the first delay is greater than the second delay.

13. The method according to claim 12, wherein switching to the second communication mode according to the selected switching delay comprises:

starting timing after the delay is selected; and

switching to the second communication mode when the selected switching delay expires.

14. The method according to claim 13, wherein switching to the second communication mode when the selected switching delay expires comprises:

when the selected switching delay expires, determining whether the CINR value and the RSSI value always meet the preset switching condition within the selected switching delay; and

if the CINR value and the RSSI value always meet the preset switching condition within the selected switching delay, switching to the second communication mode.

15. The method according to claim 11, further comprising determining that the CINR value and the RSSI value both meet the preset switching condition.

16. The method according to claim 15, where the determining comprises determining whether the CINR value is greater than or equal to a preset CINR threshold and whether the RSSI value is greater than or equal to a preset RSSI threshold.