Adjusting multi-carrier modulation and transmission power properties

摘要

A tone map includes physical layer transmission properties for a multi-carrier communications channel. The physical layer transmission properties indicate modulation mode and transmission power to be used on one or more frequencies (i.e. “tones”). The transmission power may be reduced on a first frequency having a high signal-to-noise ratio (SNR) so that performance will improve for a second frequency having a lower SNR. Transmission power may be reduced on a first frequency having an unusably low SNR so that performance will improve on a second frequency. A tone map message is used to efficiently communicate modulation and transmission power adjustments on a per-carrier basis.

主权项

1. A method for coordinating communications via a communications channel between a first device and a second device, the method comprising:
preparing, at the first device, a tone map that includes modulation information and transmission power information for each of at least a first frequency and a second frequency; defining a custom tone map value to represent a combination of modulation and transmission power; using the custom tone map value in a carrier-specific field of the tone map; transmitting a configuration message to the second device, wherein the configuration message defines the custom tone map value in association with the combination of the modulation and the transmission power; and transmitting the tone map to the second device.