US5577168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beacon based packetized cellular system with real-time processing
Assignee: Nokia of America Corp
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Filing: 1995-01-23
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Granted: 1996-11-19
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Expires: 2015-01-23
Abstract
Abstract A packetized cellular system in which a mobile quasi-periodically transmits a beacon signal containing an ID number to a first base station in the cell in which it is located for storage with the ID's of other active mobiles in the cell. A copy of a list of the active mobiles in that cell is transmitted to all adjacent cells where they are placed on non-active list. Control of a mobile is handed-off to a second base station upon the receipt of a transmitted ID number of the mobile at the second base station. The mobile is then listed as active in the database of the second base station and non-active in the first base station.
Inventors
- 👤 Zygmunt Haas
- 👤 Chih-Lin I
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:35
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0055; H04W36/0058; H04W36/08; H04W72/00; H04W72/20; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
200 words
A packetized, cellular communication system having a plurality of cells with a partial overlapping coverage area with adjacent cells, each cell having a single base station therein, comprising: a plurality of first database lists, each associated with the base station in a respective one of said plurality of cells, each of said first database lists containing information identifying active mobiles travelling in a coverage region associated with the base station in said respective one of said plurality of cells; a plurality of second database lists, each associated with the base station in said respective one of the plurality of cells, said second database lists containing information identifying active mobiles in cells adjacent to said respective one of the plurality of cells; means for transmitting a beacon signal containing ID information from active mobiles in a first base station coverage region to a first base station, in the first database list therein; and means for periodically transmitting copies of the list of the ID information of active mobiles in the first station coverage region from the first database list of the first base station to each said second database lists of base stations in cells adjacent to the first base station.
Claim 2
Dependent Claim
200 words
A packetized, cellular communication system having a plurality of cells with a partial overlapping coverage area with adjacent cells, each cell having a single base station therein, comprising: a plurality of first database lists, each associated with the base station in a respective one of said plurality of cells, each of said first database lists containing information identifying active mobiles travelling in a coverage region associated with the base station in said respective one of said plurality of cells; a plurality of second database lists, each associated with the base station in said respective one of the plurality of cells, said second database lists containing information identifying active mobiles in cells adjacent to said respective one of the plurality of cells; means for transmitting a beacon signal containing ID information from active mobiles in a first base station coverage region to a first base station, in the first database list therein; and means for periodically transmitting copies of the list of the ID information of active mobiles in the first station coverage region from the first database list of the first base station to each said second database lists of base stations in cells adjacent to the first base station.
Claim 3
Dependent Claim
52 words
The system as set forth in claim 1 characterized by: means for handing-off control of a mobile from the first base station to a second base station, in an adjacent cell, into which the mobile is moving, upon the receipt of the beacon signal of the mobile at the second base station.
Claim 4
Dependent Claim
33 words
The system as set forth in claim 1, wherein: the beacon signal contains the number of data slots of a transmission channel required to accommodate the packets to be transmitted from the mobile.
Claim 5
Dependent Claim
28 words
The system as set forth in claim 1, wherein: the beacon signal is only activated when the mobile is within a predetermined distance from the overlapping coverage area.
Claim 6
Dependent Claim
18 words
The system as set forth in claim 1, wherein: the beacon signal is transmitted over a separate S-channel.
Claim 7
Dependent Claim
23 words
The system as set forth in claim 1, wherein: the beacon signal contains a call destination number in addition to the ID information.
Claim 8
Dependent Claim
26 words
The system as set forth in claim 1, wherein said means for periodically transmitting copies of the list of the ID information includes a terrestrial network.
Claim 9
Dependent Claim
29 words
The system as set forth in claim 1, wherein said means for transmitting the beacon signal is adapted to have a transmission period having a predetermined amount of jitter.
Claim 10
Dependent Claim
26 words
The system as set forth in claim 8, wherein said jitter is configured to provide a transmission rate in the order of several beacon transmission times.
Claim 11
Dependent Claim
157 words
A packetized cellular communications system having a plurality of cells with a partial overlapping coverage area with adjacent cells, each cell having a single base station for receiving transmissions of beacon signals from a plurality of mobiles, comprising: means for applying an amount of jitter to each beacon signal transmitted from each of said plurality of mobiles; means, in said plurality of mobiles, for quasi-periodically transmitting respective beacon signals having a respective said amount of jitter and containing ID information from a mobile located in a region of coverage defined by a base station, for storage in a first database list associated with said base station, wherein said amount of jitter acts to prevent interference of more than one beacon signals transmitted from said plurality of mobiles; and means for periodically transmitting copies of the list of ID information of said plurality of mobiles from said base station to all base stations in cells located adjacent thereto.
Claim 12
Dependent Claim
157 words
A packetized cellular communications system having a plurality of cells with a partial overlapping coverage area with adjacent cells, each cell having a single base station for receiving transmissions of beacon signals from a plurality of mobiles, comprising: means for applying an amount of jitter to each beacon signal transmitted from each of said plurality of mobiles; means, in said plurality of mobiles, for quasi-periodically transmitting respective beacon signals having a respective said amount of jitter and containing ID information from a mobile located in a region of coverage defined by a base station, for storage in a first database list associated with said base station, wherein said amount of jitter acts to prevent interference of more than one beacon signals transmitted from said plurality of mobiles; and means for periodically transmitting copies of the list of ID information of said plurality of mobiles from said base station to all base stations in cells located adjacent thereto.
Claim 13
Dependent Claim
61 words
A packetized cellular communication system as recited in claim 10, further including: a first database list associated with the base station in each of said plurality of cells, said first database list containing information identifying mobiles travelling therein; and a second database list associated with each said base station, said second database list containing information identifying mobiles in adjacent cells thereto.
Claim 14
Dependent Claim
54 words
A packetized cellular communication system as recited in claim 10, further including; means for handing-off control of a mobile from the first base station to a second base station, in an adjacent cell, into which the mobile is moving, upon the receipt of the beacon signal of the mobile at the second base station.
Claim 15
Dependent Claim
31 words
A packetized cellular communication system as recited in claim 12, wherein said quasi-periodically transmitted beacon is only activated when said mobile is within a predetermined distance from the overlapping coverage area.
Claim 16
Dependent Claim
22 words
A packetized cellular communication system as recited in claim 13, wherein said quasi-periodically transmitted beacon signal is transmitted over a separate channel.
Claim 17
Dependent Claim
21 words
A packetized cellular communication system as recited in claim 14, wherein said quasi-periodically transmitted beacon signal contains a call destination number.
Claim 18
Independent Claim
160 words
A method of signaling between a mobile and a base station in a packetized cellular system having a plurality of cells with a partial with a partial overlapping coverage area with adjacent cells, each cell having a single base station for receiving transmissions of beacon signals from a plurality of mobiles, comprising the steps of: applying an amount of jitter to each beacon signal transmitted from each of said plurality of mobiles; quasi-periodically transmitting, from said plurality of mobiles, respective beacon signals having a respective said amount of jitter containing ID information to a base station for storage in a database list associated with said base station, wherein said amount of jitter acts to prevent interference of more than one beacon signals transmitted from said plurality of mobiles, and periodically transmitting the ID information of the plurality of mobiles from said base station to all base stations associated with cells located adjacent thereto for storage therein on non-active mobile lists.
Claim 19
Independent Claim
160 words
A method of signaling between a mobile and a base station in a packetized cellular system having a plurality of cells with a partial with a partial overlapping coverage area with adjacent cells, each cell having a single base station for receiving transmissions of beacon signals from a plurality of mobiles, comprising the steps of: applying an amount of jitter to each beacon signal transmitted from each of said plurality of mobiles; quasi-periodically transmitting, from said plurality of mobiles, respective beacon signals having a respective said amount of jitter containing ID information to a base station for storage in a database list associated with said base station, wherein said amount of jitter acts to prevent interference of more than one beacon signals transmitted from said plurality of mobiles, and periodically transmitting the ID information of the plurality of mobiles from said base station to all base stations associated with cells located adjacent thereto for storage therein on non-active mobile lists.
Claim 20
Dependent Claim
138 words
A method of signaling between a mobile and a base station as recited in claim 16, further including the steps of: periodically transmitting copies of the active mobiles ID list from the first base station to all base stations associated with cells located adjacent to the first cell; storing the list of ID numbers in the database of the base stations of each of the adjacent cells and characterizing the ID numbers as non-active; receiving the beacon signal containing the ID number of the mobile at the second base station when the mobile moves into an overlapping area of coverage of the first and second cells; and updating the list at the second base station to change the status of the mobile from the non-active to active to transfer control of the mobile to the second base station.
Claim 21
Dependent Claim
75 words
A method of signaling between a mobile and a base station as recited in claim 16, further including the steps of; providing a first database in each said base station; providing a second database in each said base station; storing in each said first database of each base station, information identifying active mobiles travelling therein; and storing in each said second database of each base station, information identifying active mobiles located in adjacent cell thereto.
Claim 22
Independent Claim
172 words
A method for handing-off control of calls in a packetized, cellular system, comprising the steps of: transmitting a beacon signal comprising ID numbers for identifying active mobiles travelling in a base station coverage region of a first cell, for storage in a first database list associated with the first cell; periodically transmitting ID numbers from the first database list of the first cell to all the cells located adjacent to the first cell; storing the transmitted ID numbers in a second database list associated with each said cell located adjacent the first cell characterizing the ID numbers as non-active mobiles; receiving the beacon signal containing the ID numbers of the mobiles at one of said cells located adjacent to the first cell when the mobiles move into an overlapping area of coverage with the one adjacent cell; and updating a first database list of the adjacent cell to the first cell to change the status of the mobiles from non-active to active to transfer control of the mobiles to the adjacent cell.
Claim 23
Independent Claim
172 words
A method for handing-off control of calls in a packetized, cellular system, comprising the steps of: transmitting a beacon signal comprising ID numbers for identifying active mobiles travelling in a base station coverage region of a first cell, for storage in a first database list associated with the first cell; periodically transmitting ID numbers from the first database list of the first cell to all the cells located adjacent to the first cell; storing the transmitted ID numbers in a second database list associated with each said cell located adjacent the first cell characterizing the ID numbers as non-active mobiles; receiving the beacon signal containing the ID numbers of the mobiles at one of said cells located adjacent to the first cell when the mobiles move into an overlapping area of coverage with the one adjacent cell; and updating a first database list of the adjacent cell to the first cell to change the status of the mobiles from non-active to active to transfer control of the mobiles to the adjacent cell.
References Cited (Backward Citations)
US4112257A
Cited
US4916691A
Cited
US5189734A
Cited
US5121126A
Cited
US5301357A
Cited
US5303289A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-19 | 2000-05-20 | 2000-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-19 | 2004-05-20 | 2004-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-19 | 2008-05-20 | 2008-11-19 | $7700.00 | Window Closed / Lapsed |