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US5864547A
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Method and system for controlling uplink power in a high data rate satellite communication system employing on-board demodulation and remodulation
Assignee: The AT&T MVPD Group LLC
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Filing: 1996-08-21
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Granted: 1999-01-26
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Expires: 2016-08-21
Abstract
Abstract A method and system for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals that are linked by and that communicate with each other by way of a satellite relay system. A downlink error rate of the data in a downlink data stream is determined based on known data bits. An end-to-end error rate of the uplink data stream and the downlink data stream is determined. An error rate of the signal transmission is then determined based on the downlink error rate and the end-to-end error rate. The signal transmission is then controlled based on the error rate of the signal transmission.
Inventors
- 👤 Andrew L. Strodtbeck
- 👤 Jennifer L. Vollbrecht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:07
CPC Classifications
H; H04; H04L; H04L1/00; H04L1/20; H04B; H04B7/00; H04B7/14; H04B7/15; H04B7/185; H04B7/1853; H04B7/18539; H04B7/18543
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
119 words
A method for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals linked and communicating data by way of a satellite relay system, wherein the data is transmitted by an uplink data stream and a downlink data stream, the method comprising the steps of: determining a downlink error rate of the downlink data stream; determining an end-to-end error rate of the uplink data stream and the downlink data stream; determining an error rate of the signal transmission based on the downlink error rate and the end-to-end error rate; and controlling the power of the signal transmission based on the error rate of the signal transmission.
Claim 2
Independent Claim
119 words
A method for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals linked and communicating data by way of a satellite relay system, wherein the data is transmitted by an uplink data stream and a downlink data stream, the method comprising the steps of: determining a downlink error rate of the downlink data stream; determining an end-to-end error rate of the uplink data stream and the downlink data stream; determining an error rate of the signal transmission based on the downlink error rate and the end-to-end error rate; and controlling the power of the signal transmission based on the error rate of the signal transmission.
Claim 3
Dependent Claim
37 words
The method as recited in claim 1 wherein the step of determining the downlink error rate includes the step of counting errors which occur on predetermined data bits which have been interleaved into the downlink data stream.
Claim 4
Dependent Claim
23 words
The method as recited in claim 2 wherein the step of counting includes the step of time division multiplexing the downlink data stream.
Claim 5
Dependent Claim
16 words
The method as recited in claim 3 wherein the predetermined data bits include framing synchronization data.
Claim 6
Dependent Claim
68 words
The method as recited in claim 1 wherein the step of determining the end-to-end error rate includes the steps of: encoding blocks of the data transmitted by the uplink data stream to include redundant information; decoding the blocks of data in the downlink data stream to generate decoded blocks of data; and determining a number of errors in the decoded blocks of data based on the redundant information.
Claim 7
Dependent Claim
39 words
The method as recited in claim 5 wherein the step of determining the number of errors includes the step of averaging the number of errors in the decoded blocks of data over a plurality of the blocks of data.
Claim 8
Independent Claim
125 words
A system for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals linked and communicating data by way of a satellite relay system, wherein the data is transmitted by an uplink data stream and a downlink data stream, the system comprising: means for determining a downlink error rate of the downlink data stream; means for determining an end-to-end error rate of the uplink data stream and the downlink data stream; means for determining an error rate of the signal transmission based on the downlink error rate and the end-to-end error rate; and a controller for controlling the power of the signal transmission based on the error rate of the signal transmission.
Claim 9
Independent Claim
125 words
A system for controlling uplink power for signal transmission in a satellite communication system employing on-board demodulation and remodulation and having a plurality of user terminals linked and communicating data by way of a satellite relay system, wherein the data is transmitted by an uplink data stream and a downlink data stream, the system comprising: means for determining a downlink error rate of the downlink data stream; means for determining an end-to-end error rate of the uplink data stream and the downlink data stream; means for determining an error rate of the signal transmission based on the downlink error rate and the end-to-end error rate; and a controller for controlling the power of the signal transmission based on the error rate of the signal transmission.
Claim 10
Dependent Claim
36 words
The system as recited in claim 7 wherein the means for determining the downlink error rate includes means for counting errors which occur on predetermined data bits which have been interleaved into the downlink data stream.
Claim 11
Dependent Claim
22 words
The system as recited in claim 8 wherein the means for counting includes means for time division multiplexing the downlink data stream.
Claim 12
Dependent Claim
16 words
The system as recited in claim 9 wherein the predetermined data bits include framing synchronization data.
Claim 13
Dependent Claim
73 words
The system as recited in claim 7 wherein the means for determining the end-to-end error rate comprises: an encoder for encoding blocks of the data transmitted by the uplink data stream to include redundant information; a decoder for decoding the blocks of data in the downlink data stream to generate decoded blocks of data; and means for determining a number of errors in the decoded blocks of data based on the redundant information.
Claim 14
Dependent Claim
38 words
The system as recited in claim 11 wherein the means for determining the number of errors includes means for averaging the number of errors in the decoded blocks of data over a plurality of the blocks of data.
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) | 2002-01-25 | 2002-07-27 | 2003-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-01-25 | 2006-07-27 | 2007-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-01-25 | 2010-07-27 | 2011-01-26 | $7700.00 | Window Closed / Lapsed |