Method and apparatus for differentiated communication channel robustness in a multi-tone transceiver
First Claim
1. A method for operating a multi-tone transceiver comprising:
- dedicating a fixed subset of tones in each successive symbol to at least one robust communication channel (RCC) and remaining tones to a standard communication channel (SCC);
assigning a first noise margin target for data transported on the first set of tones dedicated to the RCC and a second noise margin target lower than the first noise margin for data transported on the remaining tones dedicated to the SCC; and
determining bit-loading for the first set of tones dedicated to the RCC and remaining tones dedicated to the SCC based on the first and second noise margin targets respectively, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.
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Abstract
A multi-tone transceiver including: a channel controller and a plurality of components forming a transmit path and a receive path. The channel controller configured to determine bit-loading for each successive symbol or tone set based on a 1st noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2nd noise margin target less than the 1st noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC). The plurality of components forming the transmit and receive paths are responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC.
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Citations
21 Claims
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1. A method for operating a multi-tone transceiver comprising:
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dedicating a fixed subset of tones in each successive symbol to at least one robust communication channel (RCC) and remaining tones to a standard communication channel (SCC); assigning a first noise margin target for data transported on the first set of tones dedicated to the RCC and a second noise margin target lower than the first noise margin for data transported on the remaining tones dedicated to the SCC; and determining bit-loading for the first set of tones dedicated to the RCC and remaining tones dedicated to the SCC based on the first and second noise margin targets respectively, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for operating a pair of multi-tone transceivers coupled to one another across a communication medium, and the method comprising:
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dedicating a fixed subset of tones in each successive symbol to at least one robust communication channel (RCC) and remaining tones to a standard communication channel (SCC); assigning a first noise margin target for data transported on the first set of tones dedicated to the RCC and a second noise margin target lower than the first noise margin for data transported on the remaining tones dedicated to the SCC; and transmitting RCC and SCC tone dedication information and target first and second noise margins to an opposing one of the pair of transceivers. - View Dependent Claims (9, 10, 11)
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12. A means for operating a multi-tone transceiver comprising:
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means for dedicating a fixed subset of tones in each successive symbol to at least one robust communication channel (RCC) and remaining tones to a standard communication channel (SCC); means for assigning a first noise margin target for data transported on the first set of tones dedicated to the RCC and a second noise margin target lower than the first noise margin for data transported on the remaining tones dedicated to the SCC; and means for determining bit-loading for the first set of tones dedicated to the RCC and remaining tones dedicated to the SCC based on the first and second noise margin targets respectively, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A multi-tone transceiver for multi-tone communications comprising:
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a channel controller configured to determine bit-loading for each successive symbol based on a 1st noise margin target for a first subset of tones in each tone set dedicated to transport of a robust communications channel (RCC) and based on a 2nd noise margin target less than the 1st noise margin target for remaining tones in each tone set dedicated to a standard communications channel (SCC); and a plurality of components forming a transmit path and a receive path responsive to the channel controller to select for data modulated on a given tone at least one of smaller constellations and higher gain scaling levels when the given tone corresponds to an RCC tone as compared to an SCC tone, whereby the first set of tones dedicated to the RCC exhibit greater immunity to noise variations than the remaining tones dedicated to the SCC. - View Dependent Claims (19, 20, 21)
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Specification