US5812540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for mitigating an orphan condition in a spread-spectrum communication system
Assignee: Google Technology Holdings LLC
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Filing: 1996-11-06
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Granted: 1998-09-22
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Expires: 2016-11-06
Abstract
Abstract An orphan condition is mitigated in a spread-spectrum communication system by determining when a remote unit (113) is likely to become an orphan (315) and adjusting remote unit (113) operating parameters (360) to force additional base stations (101, 102) to be added the remote unit's (113) active set. In particular, when it is determined that a remote unit (113) is likely to become an orphan, T -- ADD and T -- COMP are adjusted so that the remote unit (113) is forced to add additional base stations (101, 102) to its active set. Increasing the number of base stations (101, 102) that a remote unit (113) is communicating with greatly reduces the probability that the remote unit (113) will become an orphan.
Inventors
- 👤 Eugene J. Bruckert
- 👤 Janusz Hyziak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:51
CPC Classifications
H; H04; H04W; H04W36/00; H04W36/08; H04W36/083; H04W36/16; H04W36/18
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
A method for mitigating an orphan condition in a spread-spectrum communication system, the method comprising the steps of: receiving a signal transmitted by a remote unit; measuring a signal quality of the transmitted signal at a base station; determining when the remote unit is not handing off to an acceptable base station; adding more base stations to an active list in response to the determination; and communicating with the remote unit with more than one base station in response to the step of adding.
Claim 2
Independent Claim
84 words
A method for mitigating an orphan condition in a spread-spectrum communication system, the method comprising the steps of: receiving a signal transmitted by a remote unit; measuring a signal quality of the transmitted signal at a base station; determining when the remote unit is not handing off to an acceptable base station; adding more base stations to an active list in response to the determination; and communicating with the remote unit with more than one base station in response to the step of adding.
Claim 3
Dependent Claim
37 words
The method of claim 1 wherein the step of determining comprises the steps of: determining a location of the remote unit; and determining if a prior orphan condition arose by a second remote unit at the location.
Claim 4
Dependent Claim
48 words
The method of claim 1 wherein the step of determining comprises the steps of: obtaining a load level and a noise level for a serving and a neighboring base station; and determining that the neighboring base station has a lower receive noise level than the serving base station.
Claim 5
Dependent Claim
24 words
The method of claim 1 wherein the step of determining comprises the step of determining if the remote unit is near a neighbor cell.
Claim 6
Dependent Claim
29 words
The method of claim 1 wherein the step of determining comprises the step of determining if a call quality of the remote unit is degrading below a threshold level.
Claim 7
Dependent Claim
41 words
The method of claim 1 wherein the step of adding more base stations to the active list comprises the steps of: adjusting T -- ADD; and adding more base stations to the active list in response to the step of adjusting.
Claim 8
Dependent Claim
41 words
The method of claim 1 wherein the step of adding more base stations to the active list comprises the steps of: adjusting T -- COMP; and adding more base stations to the active list in response to the step of adjusting.
Claim 9
Dependent Claim
60 words
The method of claim 1 wherein the step of adding more base stations to the active list comprises the steps of: determining if a base station is a neighboring base station; measuring, at the neighboring base station, a reverse channel of the remote unit; and adding the neighboring base station to the active list based on the step of measuring.
Claim 10
Independent Claim
69 words
A method for mitigating an orphan condition within a cellular communication system, the method comprising the steps of: determining when a remote unit has a high probability of becoming an orphan; adjusting remote unit parameters based on the determination, wherein remote unit parameters are selected from a group consisting of T -- ADD and T -- COMP; and communicating with additional base stations based on the step of adjusting.
Claim 11
Independent Claim
69 words
A method for mitigating an orphan condition within a cellular communication system, the method comprising the steps of: determining when a remote unit has a high probability of becoming an orphan; adjusting remote unit parameters based on the determination, wherein remote unit parameters are selected from a group consisting of T -- ADD and T -- COMP; and communicating with additional base stations based on the step of adjusting.
Claim 12
Dependent Claim
49 words
The method of claim 9 wherein the step of determining when the remote unit has a high probability of becoming an orphan comprises the steps of: determining a location of the remote unit; and determining if a prior orphan condition arose by a second remote unit at the location.
Claim 13
Dependent Claim
60 words
The method of claim 9 wherein the step of determining when the remote unit has a high probability of becoming an orphan comprises the steps of: obtaining a load level and a noise level for a serving and a neighboring base station; and determining that the neighboring base station has a lower receive noise level than the serving base station.
Claim 14
Dependent Claim
36 words
The method of claim 9 wherein the step of determining when the remote unit has a high probability of becoming an orphan comprises the step of determining if the remote unit is near a neighbor cell.
Claim 15
Dependent Claim
41 words
The method of claim 9 wherein the step of determining when the remote unit has a high probability of becoming an orphan comprises the step of determining if a call quality of the remote unit has degraded below a threshold level.
Claim 16
Independent Claim
80 words
An apparatus for mitigating an orphan condition in a communication system, the apparatus comprising: a historical orphan data storage outputting locations where a remote unit has historically been orphaned; location finding equipment outputting a location of a remote unit; and a processor having as an input, the location of the remote unit and the locations where the remote unit has historically been orphaned and outputting a determination that the remote unit is not handing off to an acceptable base station.
Claim 17
Independent Claim
80 words
An apparatus for mitigating an orphan condition in a communication system, the apparatus comprising: a historical orphan data storage outputting locations where a remote unit has historically been orphaned; location finding equipment outputting a location of a remote unit; and a processor having as an input, the location of the remote unit and the locations where the remote unit has historically been orphaned and outputting a determination that the remote unit is not handing off to an acceptable base station.
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) | 2001-09-21 | 2002-03-23 | 2002-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-21 | 2006-03-23 | 2006-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-21 | 2010-03-23 | 2010-09-22 | $7700.00 | Window Closed / Lapsed |