Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Patent
1997-04-15
2000-02-01
Chin, Wellington
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
455432, 455439, H04Q 722
Patent
active
060213272
ABSTRACT:
A wireless communication system includes at least one mobile switching center ("MSC"), at least one base station coupled to each MSC, a visitor location register ("VLR") and a visitor location register manager ("VLRM"). Each MSC couples to at least one base system controller ("BSC") which couples to at least one base transceiver station ("BTS"). Each BTS provides wireless communication within at least one respective cell, each of the plurality of mobile terminals communicating through a corresponding BTS, BSC and MSC when resident within a cell. The VLR corresponds to one of the MSCs and stores subscriber information for mobile terminals that are active in corresponding cells. The VLRM downloads, from a home location register, subscriber information for mobile terminals becoming active within one of a plurality of cells corresponding to the VLR and stores the subscriber information as a VLR record in the VLR. In accordance with the present invention, the VLRM selectively retains VLR records when corresponding mobile terminals becomes inactive within the cells corresponding to the VLR. The VLRM organizes the VLR records based upon a selected priority. In one embodiment, the VLR is organized as a linked list based upon the priority of VLR records. Stored on the basis of priority, the VLRM may delete VLR records on the same priority basis. In one embodiment of the present invention, a selected priority relates to the time stamp of last activity within any cell respective to the VLR.
REFERENCES:
patent: 5210787 (1993-05-01), Hayes
patent: 5353331 (1994-10-01), Emery
patent: 5400390 (1995-03-01), Salin
patent: 5428665 (1995-06-01), Lantto
patent: 5537610 (1996-07-01), Maager
patent: 5557654 (1996-09-01), Maenpaa
patent: 5590175 (1996-12-01), Gallant
patent: 5600705 (1997-02-01), Maenpaa
patent: 5673308 (1997-09-01), Akhavan
patent: 5742668 (1998-04-01), Pepe et al.
patent: 5761500 (1998-06-01), Gallant et al.
patent: 5793762 (1998-08-01), Penners et al.
patent: 5815810 (1998-09-01), Gallant et al.
patent: 5819178 (1998-10-01), Cropper
patent: 5850445 (1998-12-01), Chan et al.
patent: 5850603 (1998-12-01), Lantto et al.
Kolski Stephen R.
Nguyen Nhut
Sollee Patrick N.
Chin Wellington
Garlick Bruce E.
Nortel Networks Corporation
Tran Congvan
LandOfFree
Mobile communication system having improved visitor location reg does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Mobile communication system having improved visitor location reg, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mobile communication system having improved visitor location reg will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-945183