US5809059A
Expired / Lapsed
US
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Method and apparatus for spread spectrum channel assignment
Assignee: Google Technology Holdings LLC
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Filing: 1996-11-21
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Granted: 1998-09-15
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Expires: 2016-11-21
Abstract
Abstract A controller (152) in a frequency hopped spread spectrum system (100) operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units (156) having predefined transmission intervals (12) and predefined transition intervals (14) comprises a power detector (50) that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences and a processor that computes an average noise and interference level for the at least one sequence of channels and ranks the at least one sequence of channels in accordance with the average noise and interference level computed.
Inventors
- 👤 Slim Souissi
- 👤 Samir A. Sawaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:50
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/713; H04B1/715; H04B2001/7154
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
119 words
A method for assigning a sequence of channels among a plurality of sequences in a spread spectrum communication system to at least one of a plurality of subscriber units having predefined transmission intervals and predefined transition intervals, comprising the steps of: estimating a combination of a noise level and an interference level by measuring a signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; computing an average noise and interference level for the at least one sequence of channels; and selecting the at least one sequence of channels having the lowest average noise and interference level for a next transmission of information in the spread spectrum communication system.
Claim 2
Independent Claim
119 words
A method for assigning a sequence of channels among a plurality of sequences in a spread spectrum communication system to at least one of a plurality of subscriber units having predefined transmission intervals and predefined transition intervals, comprising the steps of: estimating a combination of a noise level and an interference level by measuring a signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; computing an average noise and interference level for the at least one sequence of channels; and selecting the at least one sequence of channels having the lowest average noise and interference level for a next transmission of information in the spread spectrum communication system.
Claim 3
Dependent Claim
51 words
The method of claim 1, wherein the method further comprises the step of estimating a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal for the at least one sequence of channels among the plurality of sequences.
Claim 4
Dependent Claim
67 words
The method of claim 2, wherein the method further comprises the step of estimating a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of the series of transmission intervals and dividing a result of such subtraction by the signal strength measurement from each of the series of transition intervals.
Claim 5
Dependent Claim
48 words
The method of claim 3, wherein the method further comprises the step of optimizing a code rate and a data rate of scheduled transmissions from the at least one of a plurality of subscriber units to the spread spectrum communication system using the signal to noise ratio estimation.
Claim 6
Independent Claim
214 words
A method at a controller for assigning an optimum data rate and code rate for a particular frequency hopping sequence to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, comprising the steps of: estimating a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among a plurality of sequences; estimating a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal corresponding to the transition intervals for the at least one sequence of channels among the plurality of sequences; estimating a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of the series of transmission intervals and dividing a result of such subtraction by the signal strength measured during each of the series of transition intervals; and optimizing the code rate and data rate used for scheduled transmissions from the at least one of a plurality of subscriber units to the spread spectrum communication system using the signal to noise ratio estimation.
Claim 7
Independent Claim
214 words
A method at a controller for assigning an optimum data rate and code rate for a particular frequency hopping sequence to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, comprising the steps of: estimating a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among a plurality of sequences; estimating a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal corresponding to the transition intervals for the at least one sequence of channels among the plurality of sequences; estimating a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of the series of transmission intervals and dividing a result of such subtraction by the signal strength measured during each of the series of transition intervals; and optimizing the code rate and data rate used for scheduled transmissions from the at least one of a plurality of subscriber units to the spread spectrum communication system using the signal to noise ratio estimation.
Claim 8
Dependent Claim
28 words
The method of claim 5, wherein the method further comprises the step of computing an average noise and interference level for the at least one sequence of channels.
Claim 9
Dependent Claim
36 words
The method of claim 6, wherein the method further comprises the step of ranking the at least one sequence of channels among the plurality of sequences based on the computed average noise and interference level computed.
Claim 10
Dependent Claim
29 words
The method of claim 7, wherein the method further comprises the step of assigning a best available sequence among the plurality of sequences ranked to a particular subscriber unit.
Claim 11
Dependent Claim
132 words
A controller in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the controller comprising: an input that receives measurements taken at a base receiver that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and ranks the at least one sequence of channels in accordance with the average noise and interference level computed.
Claim 12
Dependent Claim
132 words
A controller in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the controller comprising: an input that receives measurements taken at a base receiver that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and ranks the at least one sequence of channels in accordance with the average noise and interference level computed.
Claim 13
Dependent Claim
43 words
The controller of claim 9, wherein the processor chooses a best available sequence of channels with a lowest average noise and interference level among the plurality of sequences ranked for use in a next transmission of information in the spread spectrum communication system.
Claim 14
Dependent Claim
48 words
The controller of claim 9, wherein a power detector further estimates a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal for the at least one sequence of channels among the plurality of sequences.
Claim 15
Dependent Claim
63 words
The controller of claim 11, wherein the processor further estimates a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of a series of transmission intervals and dividing a result of such subtraction by the signal strength measured during each of the series of transition intervals.
Claim 16
Dependent Claim
46 words
The controller of claim 12, wherein the processor further chooses an optimized code rate and data rate for scheduled transmissions from the at least one of a plurality of subscriber units to the frequency hopped spread spectrum system based on the signal to noise ratio estimation.
Claim 17
Dependent Claim
131 words
A controller system in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the controller system comprising: a base receiver having a power detector that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and ranks the at least one sequence of channels in accordance with the average noise and interference level computed.
Claim 18
Dependent Claim
131 words
A controller system in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the controller system comprising: a base receiver having a power detector that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and ranks the at least one sequence of channels in accordance with the average noise and interference level computed.
Claim 19
Dependent Claim
44 words
The controller system of claim 14, wherein the processor chooses a best available sequence of channels with a lowest average noise and interference level among the plurality of sequences ranked for use in a next transmission of information in the spread spectrum communication system.
Claim 20
Dependent Claim
49 words
The controller system of claim 14, wherein the power detector further estimates a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal for the at least one sequence of channels among the plurality of sequences.
Claim 21
Dependent Claim
64 words
The controller system of claim 16, wherein the processor further estimates a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of a series of transmission intervals and dividing a result of such subtraction by the signal strength measured during each of the series of transition intervals.
Claim 22
Dependent Claim
47 words
The controller system of claim 17, wherein the processor further chooses an optimized code rate and data rate for scheduled transmissions from the at least one of a plurality of subscriber units to the frequency hopped spread spectrum system based on the signal to noise ratio estimation.
Claim 23
Dependent Claim
137 words
A base receiver in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the base receiver comprising: a power detector that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and chooses the at least one sequence of channels having a lowest average noise and interference level for a next transmission of information in the spread spectrum communication system.
Claim 24
Dependent Claim
137 words
A base receiver in a frequency hopped spread spectrum system operating to assign a best available frequency hopping sequence among a plurality of sequences to at least one of a plurality of subscriber units in a spread spectrum communication system having predefined transmission intervals and predefined transition intervals, the base receiver comprising: a power detector that estimates a combination of a noise level and an interference level by measuring signal strength during a series of transition intervals for at least one sequence of channels among the plurality of sequences; and a processor that computes an average noise and interference level for the at least one sequence of channels and chooses the at least one sequence of channels having a lowest average noise and interference level for a next transmission of information in the spread spectrum communication system.
Claim 25
Dependent Claim
49 words
The base receiver of claim 19, wherein the power detector further estimates a combination of a signal, a noise and an interference level by measuring signal strength during a series of transmission intervals of the signal for the at least one sequence of channels among the plurality of sequences.
Claim 26
Dependent Claim
64 words
The base receiver of claim 20, wherein the processor further estimates a signal to noise ratio by correspondingly subtracting the signal strength measured during each of the series of transition intervals from the signal strength measured during each of a series of transmission intervals and dividing a result of such subtraction by the signal strength measured during each of the series of transition intervals.
Claim 27
Dependent Claim
40 words
The base receiver of claim 21, wherein the processor further chooses an optimized code rate and data rate for scheduled transmissions from the frequency hopped spread spectrum system to a subscriber unit based on the signal to noise ratio estimation.
Claim 28
Dependent Claim
40 words
The base receiver of claim 22, wherein the base receiver forwards information concerning a choice of the optimized code rate and data rate for scheduled transmissions from the frequency hopped spread spectrum system to a subscriber unit to a controller.
Claim 29
Dependent Claim
46 words
The base receiver of claim 19, wherein the base receiver forwards information concerning a choice of the at least one sequence of channels having the lowest average noise and interference level for the next transmission of information to a controller within the spread spectrum communication system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-09-14 | 2002-03-16 | 2002-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-09-14 | 2006-03-16 | 2006-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-09-14 | 2010-03-16 | 2010-09-15 | $7700.00 | Window Closed / Lapsed |