Channel adaptation synchronized to periodically varying channel
First Claim
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1. A method of operating in a network in which a plurality of stations communicate over a shared medium carrying a periodically varying signal, comprising:
- for each of one or more pairs of transmitter and receiver stations,determining a plurality of channel adaptations for communication between the pair of stations;
assigning a different one of the plurality of channel adaptations to each of a plurality of phase regions of the periodically varying signal; and
synchronizing the plurality of channel adaptations to the periodically varying signal based on phase offset information received from a station other than the pair of stations, the station other than the pair of stations including a circuit for tracking a predetermined characteristic of the periodically varying signal and generating the phase offset information based on the predetermined characteristic,wherein the channel adaptations include one or more communication parameters adjusted for the communication between the pair of stations, and wherein each of the pair of stations includes a channel adaptation facility for determining the one or more communication parameters.
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Abstract
A method of operating in a network (e.g., a power line communication network) in which a plurality of stations communicate over a shared medium (e.g., an AC power line) having a periodically varying channel. The method includes determining a plurality of channel adaptations (e.g., tone maps) for communication between a pair of stations, and assigning a different one of the plurality of channel adaptations to each of a plurality of phase regions of the periodically varying channel.
198 Citations
52 Claims
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1. A method of operating in a network in which a plurality of stations communicate over a shared medium carrying a periodically varying signal, comprising:
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for each of one or more pairs of transmitter and receiver stations, determining a plurality of channel adaptations for communication between the pair of stations; assigning a different one of the plurality of channel adaptations to each of a plurality of phase regions of the periodically varying signal; and synchronizing the plurality of channel adaptations to the periodically varying signal based on phase offset information received from a station other than the pair of stations, the station other than the pair of stations including a circuit for tracking a predetermined characteristic of the periodically varying signal and generating the phase offset information based on the predetermined characteristic, wherein the channel adaptations include one or more communication parameters adjusted for the communication between the pair of stations, and wherein each of the pair of stations includes a channel adaptation facility for determining the one or more communication parameters. - View Dependent Claims (2, 3, 7, 9, 11, 21, 40, 41, 42, 43, 44, 45, 46)
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4. A method of operating in a network in which a plurality of stations communicate over a shared medium carrying a periodically varying signal, comprising:
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for each of one or more pairs of transmitter and receiver stations, synchronizing channel adaptation for communication between the pair of stations to the periodically varying signal based on phase offset information received from a station other than the pair of stations, the station other than the pair of stations including a circuit for tracking a predetermined characteristic of the periodically varying signal and generating the phase offset information based on the predetermined characteristic, wherein the channel adaptation includes one or more communication parameters adjusted for the communication between the pair of stations, and wherein each of the pair of stations includes a channel adaptation facility for determining the one or more communication parameters. - View Dependent Claims (5, 28, 47)
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6. A method of operating in a power line communication network in which a plurality of stations communicate over an AC power line carrying an AC line cycle in which one or more channel characteristics vary with a phase of the AC line cycle, comprising:
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for each of one or more pairs of transmitter and receiver stations, synchronizing channel adaptation for communication between the pair of stations to the phase of the AC line cycle based on phase offset information received from a station other than the pair of stations, the station other than the pair of stations including a circuit for tracking a predetermined characteristic of the AC line cycle and generating the phase offset information based on the predetermined characteristic, wherein the channel adaptations include one or more communication parameters adjusted for the communication between the pair of stations, and wherein each of the pair of stations includes a channel adaptation facility for determining the one or more communication parameters. - View Dependent Claims (8, 10, 12, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 24, 25, 26, 27, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 48, 49, 50)
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39. A method of operating in a network in which a plurality of stations communicate over a shared medium carrying a periodically varying signal, comprising:
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for each of pairs of transmitter and receiver stations, determining a plurality of channel adaptations for adapting to a link between the pair of stations, each of the plurality of channel adaptations specifying communication parameters that are unique to the pair of stations, where the communication parameters include a plurality of frequencies used for communicating over the link between the pair of stations and include respective modulations for the specified frequencies; assigning a different one of the plurality of channel adaptations to each of a plurality of phase regions of the periodically varying signal; and synchronizing the plurality of channel adaptations to the periodically varying signal based on phase offset information received from a station other than the pair of stations, the station other than the pair of stations including a circuit for tracking a predetermined characteristic of the periodically varying signal and generating the phase offset information based on the predetermined characteristic, wherein each of the pair of stations includes a channel adaptation facility for determining the communication parameters. - View Dependent Claims (51, 52)
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Specification