Feedback-based management of variable-rate communication links
First Claim
1. A method for communication, comprising:
- transmitting data from a transmitter to a receiver over a wireless communication link at a variable data rate using Adaptive Coding and Modulation (ACM);
setting the data rate at which the data is transmitted by selecting, based on feedback information that is fed back from the receiver to the transmitter, an ACM profile that defines a Forward Error Correction (FEC) code and a modulation scheme for encoding and modulating the data; and
upon detecting that the feedback information is unusable, changing an operation of the transmitter independently of the feedback, wherein the feedback information is unusable when the transmitter is unable to use the feedback information as a valid indication for setting the data rate.
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Abstract
A method for communication includes transmitting data from a transmitter to a receiver using Adaptive Coding and Modulation (ACM). The data rate is set by selecting, based on feedback, an ACM profile defining a Forward Error Correction code and a modulation scheme. Upon detecting that the feedback is unusable, an operation of the transmitter is changed independently of the feedback.
In another method, data is exchanged over two opposite directions of a bidirectional link that uses ACM by communicating using two ACM profiles. A joint constraint is defined on the two directions. The two ACM profiles are set based on first and second measured reception quality metrics of the two link directions, to meet the joint constraint. In yet another method, a subset of the ACM profiles is temporarily disabled, and the data is transmitted using only the ACM profiles that are not disabled.
186 Citations
26 Claims
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1. A method for communication, comprising:
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transmitting data from a transmitter to a receiver over a wireless communication link at a variable data rate using Adaptive Coding and Modulation (ACM); setting the data rate at which the data is transmitted by selecting, based on feedback information that is fed back from the receiver to the transmitter, an ACM profile that defines a Forward Error Correction (FEC) code and a modulation scheme for encoding and modulating the data; and upon detecting that the feedback information is unusable, changing an operation of the transmitter independently of the feedback, wherein the feedback information is unusable when the transmitter is unable to use the feedback information as a valid indication for setting the data rate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A communication system, comprising:
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a transmitter, which is arranged to transmit data to a remote receiver over a wireless communication link at a variable data rate using Adaptive Coding and Modulation (ACM); and a controller, which is arranged to set the data rate at which the data is transmitted by selecting, based on feedback information that is fed back from the remote receiver, an ACM profile that defines a Forward Error Correction (FEC) code and a modulation scheme for encoding and modulating the data and, upon detecting that the feedback information is unusable, to change an operation of the transmitter independently of the feedback, wherein the feedback information is unusable when the controller is unable to use the feedback information as a valid indication to set the data rate. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification