Reconnection control method and device for mobile terminal

• US 20080076434A1
• Filed: 08/31/2007
• Published: 03/27/2008
• Est. Priority Date: 09/22/2006
• Status: Abandoned Application

• Current Assignee: Fujiso Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kondou, Takako, Satou, Akihiro, Shigaki, Koki
• Application Number:
  US11/896,399
• Publication Number:
  US 20080076434A1
• Time in Patent Office: Days
• US Class Current: 455/442
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

In a reconnection control method and device for mobile terminal which can automatically change an optimum reconnection time according to various states, a handover history of a mobile terminal is managed, a next handover destination cell of the mobile terminal is predicted from the handover history. When it is detected that the predicted handover destination cell corresponds to a radio wave-faulted area, a predetermined reconnection time for the mobile terminal is changed. When the radio wave-faulted area is a non-service area where a cell is not mounted, the predetermined reconnection time is reduced. When the radio wave-faulted area is a temporary radio wave-faulted area, the predetermined reconnection time is extended. When the radio wave-faulted area is a congestion area, the predetermined reconnection time is reduced.

Claims

1. A reconnection control method for mobile terminal comprising:

a first step of managing a handover history of a mobile terminal;

a second step of predicting a next handover destination cell of the mobile terminal based on the handover history; and

a third step of changing, when it is detected that the predicted handover destination cell corresponds to a radio wave-faulted area, a predetermined reconnection time for the mobile terminal.

2. The reconnection control method for mobile terminal as claimed in claim 1, wherein the third step includes a step of reducing, when the radio wave-faulted area is a non-service area where a cell is not mounted, the predetermined reconnection time.

3. The reconnection control method for mobile terminal as claimed in claim 1, wherein the third step includes a step of extending, when the radio wave-faulted area is a temporary radio wave-faulted area, the predetermined reconnection time.

4. The reconnection control method for mobile terminal as claimed in claim 1, wherein the third step includes a step of reducing, when the radio wave-faulted area is a congestion area, the predetermined reconnection time.

5. The reconnection control method for mobile terminal as claimed in claim 1, wherein the first step manages handover histories of a plurality of mobile terminals, the second step includes a step of predicting, when the next handover destination cell is predicted from the handover history, a collective movement of the mobile terminals of the next handover destination cell, and the third step includes a step of changing, when it is determined based on a resource state of the next handover destination cell that a resource required for reconnection of all of the mobile terminals of the collective movement can not be secured, the predetermined reconnection time per mobile terminal.

6. The reconnection control method for mobile terminal as claimed in claim 1, further comprising a fourth step of holding, when a reconnection is unable to be performed even after the predetermined reconnection time has elapsed, a reconnection failure frequency per cell, and of extending, when the reconnection failure frequency has exceeded a first threshold, the reconnection time of the handover destination cell to be held per cell, the second step including a step of making, when the reconnection failure frequency, held at the fourth step, of the handover destination cell predicted has exceeded the first threshold, the reconnection time per cell a reconnection time of the mobile terminal.

7. The reconnection control method for mobile terminal as claimed in claim 6, wherein the fourth step includes a step of reducing, when the reconnection failure frequency has exceeded a second threshold larger than the first threshold, the reconnection time of the handover destination cell to be held per cell.

8. A reconnection control method for mobile terminal comprising:

a first step of detecting a type of an incoming/outgoing call of a mobile terminal upon call connection operation; and

a step of changing a predetermined reconnection time for the mobile terminal according to the type.

9. A reconnection control device for mobile terminal comprising:

a first means managing a handover history of a mobile terminal;

a second means predicting a next handover destination cell of the mobile terminal based on the handover history; and

a third means changing, when it is detected that the predicted handover destination cell corresponds to a radio wave-faulted area, a predetermined reconnection time for the mobile terminal.

10. The reconnection control device for mobile terminal as claimed in claim 9, wherein the third step includes a means reducing, when the radio wave-faulted area is a non-service area where a cell is not mounted, the predetermined reconnection time.

11. The reconnection control device for mobile terminal as claimed in claim 9, wherein the third step includes a means extending, when the radio wave-faulted area is a temporary radio wave-faulted area, the predetermined reconnection time.

12. The reconnection control device for mobile terminal as claimed in claim 9, wherein the third step includes a means reducing, when the radio wave-faulted area is a congestion area, the predetermined reconnection time.

13. The reconnection control device for mobile terminal as claimed in claim 9, wherein the first step manages handover histories of a plurality of mobile terminals, the second step includes a means predicting, when the next handover destination cell is predicted from the handover history, a collective movement of the mobile terminals of the next handover destination cell, and the third step includes a means changing, when it is determined based on a resource state of the next handover destination cell that a resource required for reconnection of all of the mobile terminals of the collective movement can not be secured, the predetermined reconnection time per mobile terminal.

14. The reconnection control device for mobile terminal as claimed in claim 9, further comprising a fourth means holding, when a reconnection is unable to be performed even after the predetermined reconnection time has elapsed, a reconnection failure frequency per cell, and extending, when the reconnection failure frequency has exceeded a first threshold, the reconnection time of the handover destination cell to be held per cell, the second step including a means making, when the reconnection failure frequency, held by the fourth means the handover destination cell predicted has exceeded the first threshold, the reconnection time per cell a reconnection time of the mobile terminal.

15. The reconnection control device for mobile terminal as claimed in claim 14, wherein the fourth step includes a means reducing, when the reconnection failure frequency has exceeded a second threshold larger than the first threshold, the reconnection time of the handover destination cell to be held per cell.

16. A reconnection control device for mobile terminal comprising:

a first means detecting a type of an incoming/outgoing call of a mobile terminal upon call connection operation; and

a means changing a predetermined reconnection time for the mobile terminal according to the type.