CONTROL OF STORAGE OF SUBSCRIBER DATA IN MOBILE COMMUNICATION SYSTEM

• US 20020107018A1
• Filed: 07/28/1999
• Published: 08/08/2002
• Est. Priority Date: 12/17/1998
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: NAKAMURA, SHINJI, MAMIYA, KEIKO
• Granted Patent: US 6,463,284 B2
• Time in Patent Office: Days
• US Class Current: 455/433
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 8/06 Registration at serving network Location Register, VLR or user mobility server

Abstract

A method of storing subscriber data in a mobile-communication system includes the steps of providing a high-priority-subscriber-storage area in addition to an ordinary-subscriber-storage area, and storing subscriber data of a relevant subscriber in the high-priority-subscriber-storage area if priority of the relevant subscriber exceeds a predetermined threshold and if the ordinary-subscriber-storage area is full.

Claims

1. A method of storing subscriber data in a mobile-communication system, comprising the steps of:

a) providing a high-priority-subscriber-storage area in addition to an ordinary-subscriber-storage area; and

b) storing subscriber data of a relevant subscriber in the high-priority-subscriber-storage area if priority of the relevant subscriber exceeds a predetermined threshold and if the ordinary-subscriber-storage area is full.

2. The method as claimed in claim 1, further comprising a step of storing the subscriber data of the relevant subscriber in the ordinary-subscriber-storage area if there is a space therein.

3. The method as claimed in claim 1, wherein said step b) stores the subscriber data of the relevant subscriber in the high-priority-subscriber-storage area if there is a space therein.

4. The method as claimed in claim 1, wherein said step b) further includes the steps of:

finding another subscriber having subscriber data thereof stored in the high-priority-subscriber-storage area if there is no space in the high-priority-subscriber-storage area, said another subscriber having lower priority than the relevant subscriber and being not currently on phone; and

creating a space in the high-priority-subscriber-storage area for storing the subscriber data of the relevant subscriber if there is no space in the high-priority-subscriber-storage area by moving the subscriber data of said another subscriber from the high-priority-subscriber-storage area to the ordinary-subscriber-storage area.

5. The method as claimed in claim 1, wherein said step b) further includes the steps of:

finding another subscriber having subscriber data thereof stored in the high-priority-subscriber-storage area if there is no space in the high-priority-subscriber-storage area, said another subscriber having a lowest priority lower than that of the relevant subscriber and being not currently on phone; and

creating a space in the high-priority-subscriber-storage area for storing the subscriber data of the relevant subscriber if there is no space in the high-priority-subscriber-storage area by moving the subscriber data of said another subscriber from the high-priority-subscriber-storage area to the ordinary-subscriber-storage area.

6. A method of deleting subscriber data of a mobile station in a mobile-communication system, comprising the steps of:

a) checking priority of a mobile station when receiving a message indicating either a power down of the mobile station or a completion of a call by the mobile station;

b) keeping subscriber data of the mobile station if the priority of the mobile station exceeds a predetermined threshold; and

c) deleting the subscriber data of the mobile station if the priority of the mobile station does not exceed the predetermined threshold.

7. The method as claimed in claim 6, wherein said step c) includes the steps of:

setting a time period in accordance with the priority of the mobile station; and

deleting the subscriber data of the mobile station at an end of said time period after receiving the message if the priority of the mobile station does not exceed the predetermined threshold.

8. The method as claimed in claim 7, wherein said step of setting a time period includes a step of setting a time period that is longer as the priority of the mobile station becomes greater.

9. A method of storing subscriber data in a mobile-communication system, comprising the steps of:

a) storing subscriber data of a relevant subscriber in a data-storage area if there is a space therein; and

b) replacing subscriber data of another subscriber in the data-storage area with the subscriber data of the relevant subscriber if the data-storage area is full and if priority of the relevant subscriber exceeds a predetermined threshold, said another subscriber having lower priority than the relevant subscriber and being currently not on phone.

10. The method as claimed in claim 9, wherein said another subscriber has a lowest priority among subscribers having subscriber data thereof stored in the data-storage area who have lower priority than the relevant subscriber and are currently not on phone.

11. A device for controlling storage of subscriber data in a high-priority-subscriber-storage area and an ordinary-subscriber-storage area, comprising:

a priority-check unit which checks priority of a relevant subscriber; and

a data-storage-control unit which stores subscriber data of the relevant subscriber in the high-priority-subscriber-storage area if priority of the relevant subscriber exceeds a predetermined threshold and if the ordinary-subscriber-storage area is full.

12. The device as claimed in claim 11, wherein said data-storage-control unit stores the subscriber data of the relevant subscriber in the ordinary-subscriber-storage area if there is a space therein.

13. The device as claimed in claim 11, wherein said data-storage-control unit stores the subscriber data of the relevant subscriber in the high-priority-subscriber-storage area if there is a space therein.

14. The device as claimed in claim 11, further comprises a data-search unit which finds another subscriber having subscriber data thereof stored in the high-priority-subscriber-storage area if there is no space in the high-priority-subscriber-storage area, said another subscriber having lower priority than the relevant subscriber and being not currently on phone, and wherein said data-storage-control unit creates a space in the high-priority-subscriber-storage area for storing the subscriber data of the relevant subscriber if there is no space in the high-priority-subscriber-storage area by moving the subscriber data of said another subscriber from the high-priority-subscriber-storage area to the ordinary-subscriber-storage area.

15. The device as claimed in claim 11, further comprises a data-search unit which finds another subscriber having subscriber data thereof stored in the high-priority-subscriber-storage area if there is no space in the high-priority-subscriber-storage area, said another subscriber having a lowest priority lower than that of the relevant subscriber and being not currently on phone, and wherein said data-storage-control unit creates a space in the high-priority-subscriber-storage area for storing the subscriber data of the relevant subscriber if there is no space in the high-priority-subscriber-storage area by moving the subscriber data of said another subscriber from the high-priority-subscriber-storage area to the ordinary-subscriber-storage area.

17. The device as claimed in claim 16, further comprising a timer unit which defines a time period in accordance with the priority of the mobile station, and wherein said data-storage-control unit deletes the subscriber data of the mobile station at an end of said time period after the message receiving unit receives the message.

18. The device as claimed in claim 17, wherein said time period is longer as the priority of the mobile station becomes greater.

20. The device as claimed in claim 19, wherein said another subscriber has a lowest priority among subscribers having subscriber data thereof stored in the data-storage area who have lower priority than the relevant subscriber and are currently not on phone.

16. A device for deleting subscriber data of a mobile station in a mobile-communication system, comprising:

a message receiving unit which receives a message indicating either a power down of a mobile station or a completion of a call by the mobile station;

a priority-check unit which checks priority of the mobile station when the message receiving unit receives the message; and

a data-storage-control unit which keeps subscriber data of the mobile station if the priority of the mobile station exceeds a predetermined threshold, and deletes the subscriber data of the mobile station if the priority of the mobile station does not exceed the predetermined threshold.

19. A device of storing subscriber data in a data-storage area of a mobile-communication system, comprising:

a priority-check unit which checks priority of a relevant subscriber;

a data-search unit which finds another subscriber having subscriber data thereof stored in the data-storage area who has lower priority than the relevant subscriber and being currently not on phone; and

a data-storage-control unit which stores subscriber data of the relevant subscriber in the data-storage area if there is a space therein, and replacing the subscriber data of said another subscriber in the data-storage area with the subscriber data of the relevant subscriber if the data-storage area is full and if the priority of the relevant subscriber exceeds a predetermined threshold.