Patent Document ID: 8885736
Application ID: 12138657
Patent Flag: 1

Claim One:
1. A method for reducing peak-to-average power ratio (PAR) in a digital subscriber line (DSL) system having a passband for signal communication, the passband comprising a MEDLEY set of tones and a set of upper frequency tones having higher frequencies than the MEDLEY set of tones, the method comprising: performing a startup procedure for DSL session having a handshake phase and a transceiver training phase; and using PAR reserved tones (PRT) to reduce PAR, wherein the handshake phase comprises determining a plurality of the set of upper frequency tones for PAR reduction; reserving the plurality of the set of upper frequency tones as PRT; and transmitting an upper frequency index based on the plurality of the set of upper frequency tones, and wherein the transceiver training phase comprises obtaining bits-per-tone values for all tones; and determining a revised plurality of upper frequency tones for PAR reduction; and wherein the method further comprises performing a second startup sequence having a second handshake phase, wherein the second handshake phase comprises: reserving the revised plurality of upper frequency tones as PRT; and transmitting a second upper frequency index based on the revised plurality of upper frequency tones.