Wireless base station and mobile station

• US 20060105777A1
• Filed: 07/29/2005
• Published: 05/18/2006
• Est. Priority Date: 10/27/2004
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Shinozaki, Atsushi
• Granted Patent: US 7,890,103 B2
• Time in Patent Office: Days
• US Class Current: 455/456.100
• CPC Class Codes: H04W 60/04 using triggered events
• 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

Abstract

A mobile station used in a mobile communication system which accepts location registrations from mobile stations in order to perform mobile station location management, the mobile station being comprising a detection unit which detects that it is in an overlap region of hierarchical location registration areas; and a delay unit which delays location registration when the detection has been made.

Claims

1. A mobile station used in a mobile communication system which accepts location registrations from mobile stations in order to perform mobile station location management, the mobile station comprising:

a detection unit which detects that it is in an overlap region of hierarchical location registration areas; and

a delay unit which delays location registration when the detection has been made.

2. A mobile station as set forth in claim 1, wherein:

the detection unit performs detection based on information announced by a wireless base station forming part of the wireless communication system.

3. A mobile station as set forth in claim 1, wherein:

the delay unit delays location registration for a delay time determined by computation based on the given station'"'"'s own identification information.

4. A mobile station as set forth in claim 1, wherein:

the overlap region of hierarchical location registration areas detected by the detection unit is a region of overlap with a second tier location registration area having a wider area than the first tier location registration area for which location registration has already been effected, and the delay of location registration concerns location registration in the second tier location registration area.

5. A wireless base station used in a wireless communication system which accepts location registrations from mobile stations in order to perform mobile station location management, the wireless base station comprising:

an annunciation unit which announces to mobile stations that the wireless zone constituted by the wireless base station is contained in an overlap region of a first tier location registration area and a second tier location registration area wider than the first tier location registration area.

6. A wireless base station as set forth in claim 5, wherein:

the wireless zone corresponds to the wireless zone of the boundary area of the second tier location registration area.

7. A wireless base station as set forth in claim 5, wherein:

the annunciation unit transmits a parameter which allows lengthening of selectable delay times by which location registration in the second tier location registration area is delayed by the mobile station.

8. A wireless base station used in a wireless communication system which accepts location registrations from mobile stations in order to perform mobile station location management, the wireless base station comprising:

an annunciation unit which announces to mobile stations that the wireless zone constituted by the wireless base station is contained in an overlap area of a first tier location registration area and a second tier location registration area wider than the first tier location registration area, and that the boundary of the overlap area is being approached.