Patent US5862479A successfully refreshed from Google Patents.
US5862479A
Expired / Lapsed
US
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Space-based communication system and method with continuous channel reuse maintenance
Assignee: CDC Propriete Intellectuelle
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Filing: 1996-12-27
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Granted: 1999-01-19
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Expires: 2016-12-27
Abstract
Abstract The system (10) and method (100) adjust reuse units when nodes (e.g., satellites (20, 22)) move in a communication system (10), such as satellites (20,22) moving in their orbits around the earth in a space-based communication system (10). The method (100) and system (10) computes interference potentials between a reference reuse unit in a first reuse unit table of a first satellite (20) and reuse units being used in second reuse unit tables in second satellites (20) that are adjacent to the first satellite (20); and when the interference potentials is less than a predetermined threshold, then assigns the satellite a non-interfering reuse unit for the specific time interval.
Inventors
- 👤 Victor Hawes Cutler, Jr.
- 👤 Keith Andrew Olds
- 👤 Gerald Joseph Davieau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:03
CPC Classifications
H; H04; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/195
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
101 words
A method of reuse channel management, the method comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a physical distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 2
Independent Claim
101 words
A method of reuse channel management, the method comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a physical distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 3
Dependent Claim
19 words
A method as recited in claim 1, further comprising the step of initiating the method during a planning process.
Claim 4
Dependent Claim
28 words
A method as recited in claim 1, further comprising the step of initiating the method when one of the first and the second satellites goes down or malfunctions.
Claim 5
Dependent Claim
42 words
A method as recited in claim 1, further comprising the steps of: using a first reuse unit table to store the reference reuse unit; and using second reuse unit tables, each storing reuse units being used by one of the second satellites.
Claim 6
Dependent Claim
23 words
A method as recited in claim 1, wherein the reference reuse unit and each of the reuse units includes eight contiguous communication channels.
Claim 7
Dependent Claim
25 words
A method as recited in claim 1, wherein the reference reuse unit and each of the reuse units has a particular time slot and frequency.
Claim 8
Dependent Claim
28 words
A method as recited in claim 1, wherein the reference reuse unit and each of the reuse units has a combination of a time slot, frequency or code.
Claim 9
Dependent Claim
29 words
A method as recited in claim 1, further comprising the step of: (c) repeating steps (a) and (b) for each reference reuse unit being used by the first satellite.
Claim 10
Dependent Claim
23 words
A method as recited in claim 8, further comprising the step of: (d) repeating steps (a), (b), and (c) for each time interval.
Claim 11
Dependent Claim
28 words
A method as recited in claim 1, further comprising the step of: (c) repeating steps (a) and (b) for each reuse unit of each of the second satellites.
Claim 12
Dependent Claim
23 words
A method as recited in claim 10, further comprising the step of: (d) repeating steps (a), (b), and (c) for each time interval.
Claim 13
Dependent Claim
52 words
A method as recited in claim 1, further comprising the steps of: (c) repeating steps (a) and (b) for each reference reuse unit being used by the first satellite and for each reuse unit of each of the second satellites; and (d) repeating steps (a), (b), and (c) for each time interval.
Claim 14
Dependent Claim
32 words
A method as recited in claim 1, wherein the determining step includes the step of measuring the physical distance as a linear distance between the centers of the first and second beams.
Claim 15
Dependent Claim
35 words
A method as recited in claim 1, wherein the determining step includes the step of measuring the physical distance along a surface of earth where the center of the first and second beams are located.
Claim 16
Dependent Claim
28 words
A method as recited in claim 1, wherein step (b) comprises the step of determining whether the interference potentials are less than a predetermined threshold distance and correlation.
Claim 17
Dependent Claim
36 words
A method as recited in claim 1, wherein step (b) comprises the step of determining whether the interference potentials of the reference reuse unit and each of the reuse units will not interfere with each other.
Claim 18
Independent Claim
120 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potentials based on a physical distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse units and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 19
Independent Claim
120 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potentials based on a physical distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse units and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 20
Dependent Claim
23 words
A system as recited in claim 17, wherein the base station includes means for initiating the reuse maintenance method during a planning process.
Claim 21
Dependent Claim
28 words
A system as recited in claim 17, wherein the base station includes means for initiating the reuse maintenance method when one of the satellites goes down or malfunctions.
Claim 22
Dependent Claim
31 words
A system as recited in claim 17, wherein the base station includes means for repeating the computation and assignment for each reference reuse unit being used by each of the satellite.
Claim 23
Dependent Claim
35 words
A system as recited in claim 17, wherein the base station includes means for repeating the computation and assignment for each reference reuse unit being used by each of the satellite for each time interval.
Claim 24
Dependent Claim
30 words
A system as recited in claim 17, wherein the base station includes means for determining whether each of the interference potentials are less than a predetermined threshold distance and correlation.
Claim 25
Dependent Claim
38 words
A system as recited in claim 17, wherein the base station includes means for determining whether each of the interference potentials of the reference reuse unit and each of the reuse units will not interfere with each other.
Claim 26
Dependent Claim
14 words
A system as recited in claim 17, wherein the base station is a satellite.
Claim 27
Dependent Claim
15 words
A system as recited in claim 17, wherein the base station is located on earth.
Claim 28
Independent Claim
120 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potentials based on a linear distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse unit and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 29
Independent Claim
120 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potentials based on a linear distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse unit and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 30
Independent Claim
124 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potential based on a distance along a surface of earth between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse units and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 31
Independent Claim
124 words
A system comprising: a plurality of satellites; and a base station that is capable of communicating with the satellites and includes means for performing a reuse maintenance method that computes interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by the other satellites, for determining each of the interference potential based on a distance along a surface of earth between a center of a first beam that uses the reference reuse unit and each of a center of second beams that uses one of the reuse units and a correlation factor and for assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 32
Independent Claim
99 words
A method of reuse channel management comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a linear distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 33
Independent Claim
99 words
A method of reuse channel management comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a linear distance between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 34
Independent Claim
103 words
A method of reuse channel management comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a distance along a surface of earth between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
Claim 35
Independent Claim
103 words
A method of reuse channel management comprising the steps of: (a) computing interference potentials between a reference reuse unit being used by a first satellite and reuse units being used by second satellites by determining each of the interference potentials based on a distance along a surface of earth between a center of a first beam that uses the reference reuse unit and each of a center of second beams that use the reuse units and a correlation factor; and (b) assigning a non-interfering reuse unit to the first satellite when each of the interference potentials are less than a threshold interference potential.
References Cited (Backward Citations)
US4736453A
Cited
US5669062A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-01-18 | 2002-07-20 | 2003-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-18 | 2006-07-20 | 2007-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-18 | 2010-07-20 | 2011-01-19 | $7700.00 | Window Closed / Lapsed |