US5734967A
Expired / Lapsed
US
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Method and apparatus for reducing self interference in a communication system
Assignee: Google Technology Holdings LLC
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Filing: 1995-12-20
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Granted: 1998-03-31
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Expires: 2015-12-20
Abstract
Abstract A code division multiple access (CDMA) communication system reduces interference by reducing the encoding rate for selected mobiles. The system primarily uses link related characteristics such as, inter alia, distance measurements, physical resource power and mobile determined noise, to determine which mobiles require a encoding rate reduction. Once determined, the encoding rate of the determined mobiles is reduced, which in turn reduces self-interference and enhances system capacity.
Inventors
- 👤 Michael D. Kotzin
- 👤 Kenneth A. Stewart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:26
CPC Classifications
H; H04; H04W; H04W16/00; H04W16/14; G; G10; G10L; G10L19/00; H04L; H04L1/00; H04L1/0001; H04L1/0014; H04L2001/0092; H04L2001/0093; H04W28/00; H04W28/16; H04W28/18; H04W28/22; H04W36/00; H04W36/16; H04W36/18; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
101 words
A method of reducing a self interference in a cellular communication system, the method comprising the steps of: determining that self interference in a cellular communication system needs to be reduced: determining, from a plurality of mobile units, a subset of the plurality of mobile units which are greater than a predetermined distance from a serving base station; and reducing an encoding rate on a subset of a plurality of channels to reduce self interference, the plurality of channels corresponding to the subset of the plurality of mobile units wherein the step of adjusting is based on the steps of determining.
Claim 2
Independent Claim
101 words
A method of reducing a self interference in a cellular communication system, the method comprising the steps of: determining that self interference in a cellular communication system needs to be reduced: determining, from a plurality of mobile units, a subset of the plurality of mobile units which are greater than a predetermined distance from a serving base station; and reducing an encoding rate on a subset of a plurality of channels to reduce self interference, the plurality of channels corresponding to the subset of the plurality of mobile units wherein the step of adjusting is based on the steps of determining.
Claim 3
Dependent Claim
50 words
The method of claim 1, wherein the step of determining a subset of the plurality of mobile units which are greater than a predetermined distance from a serving base station comprises the step of determining if each mobile unit within the plurality of mobile units is in a handoff state.
Claim 4
Dependent Claim
131 words
A base station, in a cellular communication system, adjusting encoding rates on a plurality of channels to reduce a self interference, the base station comprising: a controller receiving data on a link characteristic of each of the plurality of channels, determining that self interference in the cellular communication system needs to be reduced based on the link characteristic, and determining, from a plurality of mobile units, a subset of the plurality of mobile units which are greater than a predetermined distance from a serving base station; and a plurality of speech encoders coupled to the controller wherein said controller reduces the self interference by reducing the encoding rate of the plurality of speech encoders for each of the plurality of channels associated with the subset of the plurality of mobile units.
Claim 5
Dependent Claim
131 words
A base station, in a cellular communication system, adjusting encoding rates on a plurality of channels to reduce a self interference, the base station comprising: a controller receiving data on a link characteristic of each of the plurality of channels, determining that self interference in the cellular communication system needs to be reduced based on the link characteristic, and determining, from a plurality of mobile units, a subset of the plurality of mobile units which are greater than a predetermined distance from a serving base station; and a plurality of speech encoders coupled to the controller wherein said controller reduces the self interference by reducing the encoding rate of the plurality of speech encoders for each of the plurality of channels associated with the subset of the plurality of mobile units.
Claim 6
Dependent Claim
18 words
The base station of claim 3, wherein the base station is part of a CDMA cellular communication system.
Claim 7
Dependent Claim
56 words
The base station of claim 3, wherein the base station communicates to a plurality of mobile units over the plurality of channels, wherein each of the plurality of mobile units have the same encoding rate as each of the plurality of speech encoders on a corresponding channel from the plurality of channels at the base station.
Claim 8
Dependent Claim
21 words
The base station of claim 3, wherein the distance determination includes a determination of handoff state of an associated mobile unit.
Claim 9
Dependent Claim
22 words
The base station of claim 3, wherein the link characteristic includes a transmission level of the base station on an associated channel.
Claim 10
Dependent Claim
124 words
A digital cellular communication system adjusting a plurality of encoding rates on a corresponding plurality of channels to reduce self interference, the communication system comprising: a plurality of base stations; a plurality of mobile units in communication with the plurality of base stations; a plurality of channels, for connecting the plurality of mobile units to the plurality of base stations, wherein the plurality of channels are reused by the plurality of base stations; and said plurality of base stations each having a controller that receives data on a link characteristic, determines if mobile units within the plurality of mobile units are beyond a predetermined distance, and determines the encoding rate for a plurality of channels based upon the link characteristic, and the distance determination.
Claim 11
Dependent Claim
124 words
A digital cellular communication system adjusting a plurality of encoding rates on a corresponding plurality of channels to reduce self interference, the communication system comprising: a plurality of base stations; a plurality of mobile units in communication with the plurality of base stations; a plurality of channels, for connecting the plurality of mobile units to the plurality of base stations, wherein the plurality of channels are reused by the plurality of base stations; and said plurality of base stations each having a controller that receives data on a link characteristic, determines if mobile units within the plurality of mobile units are beyond a predetermined distance, and determines the encoding rate for a plurality of channels based upon the link characteristic, and the distance determination.
Claim 12
Dependent Claim
18 words
The digital cellular communication system of claim 8, wherein the plurality of base stations employ a CDMA scheme.
References Cited (Backward Citations)
US5070536A
Cited
US5103459A
Cited
US5309474A
Cited
US5103459B1
Cited
US5115429A
Cited
US5327576A
Cited
US5280472A
Cited
US5414796A
Cited
US5179571A
Cited
US5341456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-30 | 2001-09-29 | 2002-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-30 | 2005-09-29 | 2006-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-30 | 2009-09-29 | 2010-03-31 | $7700.00 | Window Closed / Lapsed |