Patent US6195342B1 successfully refreshed from Google Patents.
US6195342B1
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Method for determining hand-off candidates in a neighbor set in a CDMA communication system
Assignee: Google Technology Holdings LLC
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Filing: 1997-11-25
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Granted: 2001-02-27
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Expires: 2017-11-25
Abstract
Abstract A CDMA communication system ( 400 ) includes a plurality of base stations ( 410, 420 and 430 ) transmitting at least a corresponding plurality of pilot signals. A mobile station ( 401 ) in a coverage area of the system ( 400 ) receives at least one of the plurality of pilot signals and transmits a Pilot Strength Measurement Message that includes a Neighbor Set of a list of a plurality of candidate pilots for a and-off routine. A method and apparatus for determining the Neighbor Set includes finding a location of the mobile station ( 401 ) in the coverage area of system ( 400 ) and determining the list of plurality of candidate pilots in the Neighbor Set according to the location of the mobile station ( 401 ).
Inventors
- 👤 Kamyar Rohani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:17
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/0005; H04W36/0083; H04W36/00835; H04B; H04B17/00; H04B17/30; H04B17/382; H04B7/00; H04B7/24; H04B7/26; H04B7/2628; H04W36/34; H04W36/38; H04W40/00; H04W40/02; H04W40/20; H04W64/00; H04W64/006; H04W36/24; H04W36/30; H04W36/302; H04W36/32; H04W36/322
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
191 words
A method of determining a Neighbor Set in a communication system, the communication system providing wireless communication, the communication system including a plurality of base stations which provide wireless coverage over a corresponding plurality of cell areas, and a mobile station located in one of said plurality of cell areas, the mobile station transmitting a Pilot Strength Measurement Message including a Neighbor Set of a list of a plurality of hand-off candidate base stations, the method comprising the steps of: associating a plurality of regions corresponding to said plurality of cell areas where each region extends beyond its corresponding cell area; determining overlapped areas where two or more of said plurality of regions are overlapping; determining whether said mobile station location is in one of the overlapped areas, said list of said plurality of hand-off candidate base stations in said Neighbor Set including at least the base stations having associated regions that overlap the area where said mobile station is located; wherein the extent of one of said plurality of regions is at least as far as covering a partial area of another cell area in said plurality of cell areas.
Claim 2
Independent Claim
191 words
A method of determining a Neighbor Set in a communication system, the communication system providing wireless communication, the communication system including a plurality of base stations which provide wireless coverage over a corresponding plurality of cell areas, and a mobile station located in one of said plurality of cell areas, the mobile station transmitting a Pilot Strength Measurement Message including a Neighbor Set of a list of a plurality of hand-off candidate base stations, the method comprising the steps of: associating a plurality of regions corresponding to said plurality of cell areas where each region extends beyond its corresponding cell area; determining overlapped areas where two or more of said plurality of regions are overlapping; determining whether said mobile station location is in one of the overlapped areas, said list of said plurality of hand-off candidate base stations in said Neighbor Set including at least the base stations having associated regions that overlap the area where said mobile station is located; wherein the extent of one of said plurality of regions is at least as far as covering a partial area of another cell area in said plurality of cell areas.
Claim 3
Dependent Claim
38 words
The method as recited in claim 1 wherein the extent of one of said plurality of regions is as far as at least covering a partial area of a nearest cell area in said plurality of cell areas.
Claim 4
Independent Claim
162 words
A method of determining a Neighbor Set in a communication system, the communication system providing wireless communication in a coverage area, the communication system including a plurality of base stations transmitting at least a corresponding plurality of pilot signals, and a mobile station receiving at least one of the plurality of pilot signals and transmitting a Pilot Strength Measurement Message including a Neighbor Set of a list of a plurality of candidate pilots, the method comprising the steps of: finding a location of said mobile station in said coverage area; determining said list of plurality of candidate pilots in said Neighbor Set according to the location of said mobile station; and determining an attribute of said mobile station in said coverage area to be used in determining said list of plurality of candidate pilots, said attribute comprising one of a speed of said mobile station movement in said coverage area, and a direction of said mobile station movement in said coverage area.
Claim 5
Independent Claim
162 words
A method of determining a Neighbor Set in a communication system, the communication system providing wireless communication in a coverage area, the communication system including a plurality of base stations transmitting at least a corresponding plurality of pilot signals, and a mobile station receiving at least one of the plurality of pilot signals and transmitting a Pilot Strength Measurement Message including a Neighbor Set of a list of a plurality of candidate pilots, the method comprising the steps of: finding a location of said mobile station in said coverage area; determining said list of plurality of candidate pilots in said Neighbor Set according to the location of said mobile station; and determining an attribute of said mobile station in said coverage area to be used in determining said list of plurality of candidate pilots, said attribute comprising one of a speed of said mobile station movement in said coverage area, and a direction of said mobile station movement in said coverage area.
Claim 6
Dependent Claim
24 words
A method of determining ads recited in claim 3 , wherein said attribute is used in deciding a frequency of performing said determining step.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-02-27 | 2004-08-28 | 2005-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-27 | 2008-08-28 | 2009-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-27 | 2012-08-28 | 2013-02-27 | $7700.00 | Window Closed / Lapsed |