US5669062A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods of demand-based adaptive channel reuse for telecommunications systems
Assignee: Intellectual Ventures I LLC
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Filing: 1996-09-09
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Granted: 1997-09-16
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Expires: 2016-09-09
Abstract
Abstract Methods efficiently assign user channels in a LEO (low-earth orbit) telecommunication system. These methods adapt the channel reuses based on system load or demand. These methods achieve high capacity and minimize interference for the particular situation. Since these methods are adaptive, they adjust to maintain efficient operation as the load conditions change.
Inventors
- 👤 Keith A. Olds
- 👤 Victor H. Cutler, Jr.
- 👤 Gerald J. Davieau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:27
CPC Classifications
H; H04; H04W; H04W72/00; H04W72/50; H04W72/54; H04W72/541; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18539; H04W84/00; H04W84/02; H04W84/04; H04W84/06
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
89 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) restricting interference potential by controlling at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern and by searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; and (c) assigning one of the unused channels with the lowest interference potential to the user.
Claim 2
Independent Claim
89 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) restricting interference potential by controlling at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern and by searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; and (c) assigning one of the unused channels with the lowest interference potential to the user.
Claim 3
Dependent Claim
32 words
A method as recited in claim 1, wherein step (b) comprises the step of terminating the search as soon as one of the unused channels which meets minimum interference criterion is found.
Claim 4
Dependent Claim
23 words
A method as recited in claim 1, wherein step (b) comprises the step of predicting interference from a combination of the unused channels.
Claim 5
Independent Claim
94 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) using at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern to predict interference from a combination of the unused channels; (c) searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; and (d) assigning one of the unused channels with the lowest interference potential to the user.
Claim 6
Independent Claim
94 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) using at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern to predict interference from a combination of the unused channels; (c) searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; and (d) assigning one of the unused channels with the lowest interference potential to the user.
Claim 7
Dependent Claim
26 words
A method as recited in claim 1, wherein step (c) comprises the step of assigning one of the unused channels if it meets minimum interference criterion.
Claim 8
Dependent Claim
28 words
A method as recited in claim 1, further comprising the step of denying access to the telecommunication system if none of the unused channels meet minimum interference criterion.
Claim 9
Independent Claim
129 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a channel for which all currently active channels that potentially interfere are beyond a distance from where the user is located; (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels; (d) reducing the distance by a predetermined amount; (e) determining whether a channel for which all of the currently active channels that potentially interfere are beyond the reduced distance; and (f) assigning the channel to the user if step (e) finds a channel that does not interfere with any of the currently active channels.
Claim 10
Independent Claim
129 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a channel for which all currently active channels that potentially interfere are beyond a distance from where the user is located; (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels; (d) reducing the distance by a predetermined amount; (e) determining whether a channel for which all of the currently active channels that potentially interfere are beyond the reduced distance; and (f) assigning the channel to the user if step (e) finds a channel that does not interfere with any of the currently active channels.
Claim 11
Dependent Claim
59 words
A method as recited in claim 7, further comprising the steps of: (g) repeating steps (d)-(f) until a channel is found that does not interfere with any of the currently active channels; and (h) blocking the user's access to the telecommunication system if a channel is not found that does not interfere with any of the currently active channels.
Claim 12
Dependent Claim
77 words
A method as recited in claim 7, further comprising the steps of: (g) repeating steps (d)-(f) until a channel is found that does not interfere with any of the currently active channels or the reduced distance is at a minimum distance; and (h) blocking access of the user to the telecommunication system if a channel is not found that does not interfere with any of the currently active channels or the reduced distance is a minimum distance.
Claim 13
Independent Claim
91 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and physical distance of the currently active channels from where the user is located; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 14
Independent Claim
91 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and physical distance of the currently active channels from where the user is located; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 15
Independent Claim
81 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of currently active channels and a region of an exclusion zone; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 16
Independent Claim
81 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of currently active channels and a region of an exclusion zone; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 17
Independent Claim
84 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and a region of an exclusion zone; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 18
Independent Claim
84 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and a region of an exclusion zone; and (c) assigning the channel to the user if step (b) finds a channel that does not interfere with any of the currently active channels.
Claim 19
Independent Claim
156 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and a physical distance of the currently active channels from where the user is located; (c) repeating step (b) until a channel is found that does not interfere with any of the currently active channels or the physical distance is reduced to a minimum distance; (d) assigning the channel to the user if a channel that does not interfere with any of the currently active channels is found; and (e) blocking the user's access to the telecommunication system if a channel is not found that does not interfere with any of the currently active channels or the distance is reduced to a minimum distance.
Claim 20
Independent Claim
156 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user for a channel; (b) determining whether a non-interfering channel exists based on at least one of propagation delays and Doppler shifts of a plurality of currently active channels and a physical distance of the currently active channels from where the user is located; (c) repeating step (b) until a channel is found that does not interfere with any of the currently active channels or the physical distance is reduced to a minimum distance; (d) assigning the channel to the user if a channel that does not interfere with any of the currently active channels is found; and (e) blocking the user's access to the telecommunication system if a channel is not found that does not interfere with any of the currently active channels or the distance is reduced to a minimum distance.
Claim 21
Independent Claim
94 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user located in a cell for a channel, wherein the request includes the cell's location; (b) generating for each of a plurality of unused channels a cost of interference based on the cell's location and an average signal-to-interference ratio of a corresponding one of the unused channels used at various points in the cell; and (c) assigning one of the unused channels having the lowest cost of interference to the user.
Claim 22
Independent Claim
94 words
A method for managing and reusing channels in a telecommunication system, the method comprising the steps of: (a) receiving a request from a user located in a cell for a channel, wherein the request includes the cell's location; (b) generating for each of a plurality of unused channels a cost of interference based on the cell's location and an average signal-to-interference ratio of a corresponding one of the unused channels used at various points in the cell; and (c) assigning one of the unused channels having the lowest cost of interference to the user.
Claim 23
Dependent Claim
37 words
A method as retired in claim 14, wherein step (c) comprises the step of assigning the one of the unused channels having an interference cost being equal to or greater than a minimum interference cost of interference.
Claim 24
Independent Claim
135 words
A method for managing and reusing channels in a telecommunication system, the telecommunication system comprising a plurality of satellites and subscriber units, the method comprising the steps of: (a) determining an anticipated demand for a duration of a planning interval; (b) restricting interference potential by controlling at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern and by searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; (c) allocating one of the unused channels with the lowest interference potential to a cell within which demand is expected; and (d) propagating movement of the satellites, location of the subscriber units, and interference sources forward in time to create a preplanned allocation of channels with minimum interference potential.
Claim 25
Independent Claim
135 words
A method for managing and reusing channels in a telecommunication system, the telecommunication system comprising a plurality of satellites and subscriber units, the method comprising the steps of: (a) determining an anticipated demand for a duration of a planning interval; (b) restricting interference potential by controlling at least one of spacing between interfering channels, time slide, frequency slide and antenna pattern and by searching through all unused channels and checking the interference potential of each of the unused channels against all channels that are already assigned; (c) allocating one of the unused channels with the lowest interference potential to a cell within which demand is expected; and (d) propagating movement of the satellites, location of the subscriber units, and interference sources forward in time to create a preplanned allocation of channels with minimum interference potential.
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) | 2000-09-15 | 2001-03-17 | 2001-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-09-15 | 2005-03-17 | 2005-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-09-15 | 2009-03-17 | 2009-09-16 | $7700.00 | Window Closed / Lapsed |