WIRELESS BASE STATION, COMMUNICATION SYSTEM, BELONGING INFORMATION MANAGEMENT METHOD AND STORAGE MEDIUM FOR STORING PROGRAM

• US 20090149222A1
• Filed: 12/08/2008
• Published: 06/11/2009
• Est. Priority Date: 12/06/2007
• Status: Active Grant

• Current Assignee: NEC Communication Systems Limited (NEC Corporation)
• Original Assignee: NEC Communication Systems Limited (NEC Corporation)
• Inventors: ITO, TETSUYA, TAKAKURA, YOSHIAKI, IIZUKA, HIROYUKI, MATSUMOTO, AKIRA, ABE, KENICHI, Ezure, Yuichiro
• Granted Patent: US 8,385,260 B2
• Time in Patent Office: Days
• US Class Current: 455/561
• CPC Class Codes: H04W 8/02 Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
• CPC Class Codes: H04W 8/08 Mobility data transfer
• CPC Class Codes: H04W 92/20 between access points

Abstract

The present invention is to allow prompt and reliable synchronization of belonging information management table even in environments where there is a possibility of receiving update notification information from a plurality of wireless base stations, without needing unnecessarily large traffic for synchronization of belonging information management table. Wireless base station stores belonging information management table, to which belonging information of a terminal belonging to the base station is associated with, to new/old judgment information for judgment of new/old of update. Belonging information update unit performs update of belonging information including the new/old judgment information thereof. Further, upon receiving update notification information from other wireless base station, the belonging information update unit updates the belonging information management table based on the update notification information. The update notification information includes at least updated portion in the belonging information and new/old judgment information.

Claims

1. A wireless base station comprising:

a management table storage unit which stores a belonging information management table in which belonging information of a terminal in each wireless base station is controlled being associated with new/old judgment information for judgment of new/old of update;

a belonging information update unit which updates the belonging information management table together with the new/old judgment information; and

a first transmission unit which transmits, when the update is made by the belonging information update means, update notification information including at least updated portion in the belonging information management table and the new/old judgment information to other wireless base station in wired or wireless fashion, wherein,

the belonging information update unit updates, when the update notification information is received from other wireless base station, the belonging information management table based on the update notification information.

2. The wireless base station according to claim 1 further comprising a periodical information transmission unit which transmits periodical transmission information including the new/old judgment information, but not including the belonging information periodically to other wireless base station.

3. The wireless base station according to claim 2 further comprising a second transmission unit, wherein the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station, and when the periodical transmission information is received from other wireless base station, and when so judged, based on the new/old judgment information included in the periodical transmission information, that the information included in the periodical transmission information is not latest, which the second transmission unit transmits general notification information for notifying the information of the belonging information management table of the own station.

4. The wireless base station according to claim 3 further comprising a latest update unit, which, when the periodical transmission information is received from other wireless base station, compares new/old judgment information about own station in the periodical transmission information and new/old judgment information about own station in belonging information management table of the management table storage unit, and when new/old judgment information of the management table storage unit is judged to be not latest, updates new/old judgment information of the management table storage unit to latest one.

5. The wireless base station according to claim 2, wherein the periodical information transmission unit transmits the periodical transmission information to a wireless base station transmittable in wired or wireless fashion without going through other wireless base station.

6. The wireless base station according to claim 1, wherein,

the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station, and

the belonging information update unit, when the general notification information is received from other wireless base station, updates the belonging information management table for a portion judged to be not latest based on the new/old judgment information in the general notification information.

7. The wireless base station according to claim 3 further comprising a third transmission unit which transmits the general notification information after a time calculated by a predetermined calculation method elapsed when the belonging information management table of other wireless base station is judged to be not latest.

8. The wireless base station according to claim 1, wherein,

the update notification information includes at least movement notification information including information of a terminal being moved from other wireless base station and the new/old judgment information, and

the first transmission unit transmits, when the belonging information management table is updated due to movement, the movement notification information.

9. The wireless base station according to claim 1, wherein,

the update notification information includes at least table update notification information including information of a terminal newly belonged and the new/old judgment information, and

the first transmission unit transmits the table update notification information when the belonging information management table is updated due to the terminal newly belonged.

10. The wireless base station according to claim 1, wherein, when a data is not received from the belonging terminal in a predetermined time, the belonging information update unit deletes belonging information of the terminal from the belonging information management table.

11. The wireless base station according to claim 1 further comprising a synchronization unit which confirms, when the new/old judgment information is initialized, the new/old judgment information based on the information received from other base station in a predetermined time.

12. The wireless base station according to claim 1 further comprising;

a search request unit which transmits search request information for performing search request of a terminal parent station thereof is unknown, and

a fourth transmission unit which notifies, when a search target terminal by received search request information belongs to the wireless base station, the update notification information including the belonging information about the wireless base station to other base station by flooding.

13. The wireless base station according to claim 1, wherein each the transmission unit notifies the update notification information to other base station by flooding.

14. The wireless base station according to claim 1, wherein update of the belonging information management table includes a case where at least parent base station of the terminal is changed.

15. The wireless base station according to claim 1, wherein the belonging terminal in the belonging information management table is connected to wireless base station in wired or wireless fashion.

16. The wireless base station according to claim 1 further comprising an update request receiving unit which receives update request from other information processing device being connected, wherein

the belonging information update unit updates, when the update request receiving unit receives update request, the belonging information management table based on the update request.

17. A communication system in which the composition used is such that a plurality of wireless base stations according to claim 1 is communicably connected.

18. A belonging information management method comprising;

a first belonging information update step for updating also new/old judgment information for judgment of new/old of update in the update information when belonging information management table for controlling belonging information of terminal in each wireless base station is updated;

a first transmitting step for transmitting, when the update is made by the first belonging information update step, update notification information including at least updated portion in the belonging information management table and the new/old judgment information to other wireless base station in wired or wireless fashion, and

a second belonging information update step for updating, when the update notification information is received from other wireless base station, the belonging information management table based on the update notification information.

19. The belonging information management method according to claim 18, wherein periodical information transmitting step for transmitting periodical transmission information including the new/old judgment information, but not including the belonging information to other wireless base station is performed every predetermined frequency.

20. The belonging information management method according to claim 19 further comprising a second transmitting step for transmitting general notification information for notifying the information of the belonging information management table of the own station when the periodical transmission information is received from other wireless station, and the information included in the periodical transmission information is judged to be not latest based on the new/old judgment information included in the periodical transmission information, wherein

the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station.

21. The belonging information management method according to claim 20 further comprising a latest update step for updating new/old judgment information in the own station to latest one, when the periodical transmission information is received from other wireless base station, new/old judgment information about the own station in the periodical transmission information and new/old judgment information about the own station in the belonging information management table in the own station are compared, and new/old judgment information in the own station is judged to be not latest.

22. The belonging information management method according to claim 19, wherein in the periodical information transmitting step, the periodical transmission information is transmitted to a wireless base station transmittable in wired or wireless fashion without going through other wireless base station.

23. The belonging information management method according to claim 18, wherein the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station, and

in the belonging information update step, when the general notification information is received from other wireless base station, the belonging information management table is updated for a portion judged to be not latest based on the new/old judgment information in the general notification information.

24. The belonging information management method according to claim 20 further comprising a third transmitting step for transmitting the general notification information after a time calculated by a predetermined calculation method elapsed, when the belonging information management table of other wireless base station is judged to be not latest.

25. The belonging information management method according to claim 18, wherein

the update notification information includes at least movement notification information including information of a terminal being moved from other wireless base station and the new/old judgment information, and

in the first transmitting step, the movement notification information is transmitted when the belonging information management table is updated due to movement.

26. The belonging information management method according to claim 18, wherein

the update notification information includes at least table update notification information including information of a terminal newly belonged and the new/old judgment information, and

in the first transmitting step, the table update notification information is transmitted when the belonging information management table is updated due to the terminal newly belonged.

27. The belonging information management method according to claim 18, wherein

when a data is not received from the belonging terminal in a predetermined time, in the belonging information update step, belonging information of the terminal is deleted from the belonging information management table.

28. The belonging information management method according to claim 18 further comprising a synchronization step for confirming, when the new/old judgment information is initialized, the new/old judgment information based on the information received from other base station in a predetermined time.

29. The belonging information management method according to claim 18 further comprising;

a search request step for transmitting search request information for performing search request of a terminal parent station thereof is unknown, and

a fourth transmitting step for transmitting update notification information including the belonging information about the wireless base station to other base station by flooding, when search target terminal by search request information being received belongs to the wireless base station.

30. The belonging information management method according to claim 18, wherein in each the transmitting step, the update notification information is notified to other base station by flooding.

31. The belonging information management method according to claim 18, wherein update of the belonging information management table includes a case where at least parent base station of the terminal is changed.

32. The belonging information management method according to claim 18 further comprising an update request receiving step for receiving update request from other information processing device being connected, wherein

in the second belonging information update step, the belonging information management table is updated based on the update request, when update request is received in the update request receiving step.

33. A storage medium for storing a belonging information management program for causing a computer in the wireless base station to execute:

a first belonging information update processing for updating including new/old judgment information for judgment of new/old of the update in the update information when the belonging information management table for controlling the belonging information of the terminal in each wireless base station is updated;

a first transmitting processing for transmitting update notification information including at least updated portion in the belonging information management table and the new/old judgment information to other wireless base station in wired or wireless fashion, when the update is made by the first belonging information update processing; and

a second belonging information update processing for updating the belonging information management table based on the update notification information, when the update notification information is received from other wireless base station.

34. The storage medium for storing the belonging information management program according to claim 33 causing the computer in the wireless base station to execute periodical information transmission processing for transmitting periodical transmission information including the new/old judgment information, but not including the belonging information to other wireless base station every predetermined frequency.

35. The storage medium for storing the belonging information management program according to claim 34 for causing the computer of the wireless base station to execute a second transmitting processing for transmitting general notification information for notifying the information of the belonging information management table of own station, when the periodical transmission information is received from other wireless base station, and when the information included in the periodical transmission information is judged to be not latest, based on the new/old judgment information included in the periodical transmission information, wherein

the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station.

36. The storage medium for storing the belonging information management program according to claim 35 for causing the computer in the wireless base station to execute latest update processing to update new/old judgment information in the own station to latest one, when the periodical transmission information is received from other wireless base station, new/old judgment information about the own station in the periodical transmission information and new/old judgment information about the own station in the belonging information management table in the own station are compared, and new/old judgment information in the own station is judged to be not latest.

37. The storage medium for storing the belonging information management program according to claim 34, wherein in the periodical information transmission processing, the periodical transmission information is transmitted to a wireless base station transmittable in wired or wireless fashion without going through other wireless base station.

38. The storage medium for storing the belonging information management program according to claim 33, wherein

the update notification information includes at least general notification information for notifying the information of the belonging information management table to other base station, and

in the belonging information update processing, when the general notification information is received from other wireless base station, the belonging information management table is updated for a portion judged to be not latest based on the new/old judgment information in the general notification information.

39. The storage medium for storing the belonging information management program according to claim 35 for causing the computer in the wireless base station to execute a third transmitting processing for transmitting the general notification information after a time calculated by a predetermined calculation method elapsed, when the belonging information management table of other wireless base station is judged to be not latest.

40. The storage medium for storing the belonging information management program according to claim 33, wherein

the update notification information includes at least movement notification information including information of a terminal being moved from other wireless base station and the new/old judgment information, and

in the first transmitting step, the movement notification information is transmitted when the belonging information management table is updated due to the movement.

41. The storage medium for storing the belonging information management program according to claim 33, wherein

the update notification information includes at least update notification information including information of a terminal newly belonged and the new/old judgment information, and

in the first transmitting processing, the table update notification information is transmitted when the belonging information management, table is updated due to the terminal newly belonged.

42. The storage medium for storing the belonging information management program according to claim 33, wherein

when a data is not received from the belonging terminal in a predetermined time, in the belonging information update processing, belonging information of the terminal is deleted from the belonging information management table.

43. The storage medium for storing the belonging information management program according to claim 33 for causing the computer in the wireless base station to execute synchronization processing for confirming, when the new/old judgment information is initialized, the new/old judgment information based on the information received from other wireless base station in a predetermined time.

44. The storage medium for storing the belonging information management program according to claim 33 for causing the computer in the wireless base station to execute search request processing for transmitting search request information for performing search request of a terminal parent station thereof is unknown, and

causing the computer in the wireless base station to execute a fourth transmitting processing for notifying update notification information including the belonging information about the wireless base station to other base station by flooding, when search target terminal by search request information being received belongs to the wireless base station.

45. The storage medium for storing the belonging information management program according to claim 33, wherein

in each the transmitting processing, the update notification information is notified to other base station by flooding.

46. The storage medium for storing the belonging information management program according to claim 33, wherein

update of the belonging information management table includes a case where at least parent base station of the terminal is changed.

47. The storage medium for storing the belonging information management program according to claim 33 for causing the computer in the wireless base station to execute update request receiving processing for receiving update request from other information processing device being connected, wherein

in the second belonging information update processing, when update request is received by the update request receiving processing, the belonging information management table is updated based on the update request.

48. A wireless base station comprising

a management table storage means for storing a belonging information management table in which belonging information of a terminal in each wireless base station is controlled being associated with new/old judgment information for judgment of new/old of update;

a belonging information update means for updating the belonging information management table together with the new/old judgment information; and

a first transmission means for transmitting, when the update is made by the belonging information update means, update notification information including at least updated portion in the belonging information management table and the new/old judgment information to other wireless base station in wired or wireless fashion, wherein,

the belonging information update means updates, when the update notification information is received from other wireless base station, the belonging information management table based on the update notification information.