Patent ID: 7760635

Claim:
A method for controlling transmission latency in a communications system, wherein the communications system is subject to a noise signal having at least a first noise phase and a second noise phase, the method comprising: determining a first bit rate for symbols transmitted during the first noise phase, and a second bit rate for symbols transmitted during the second noise phase, the first bit rate and the second bit rate being constrained such that a transmission latency does not exceed a predetermined maximum allowed transmission latency; and transmitting symbols at the first bit rate during the first noise phase and at the second bit rate during the second noise phase, wherein the first noise phase corresponds to a first signal-to-noise ratio, and the second noise phase corresponds to a second signal-to-noise ratio, wherein the second bit rate is determined based on the second signal-to-noise ratio, and wherein the first bit rate is determined by an algebraic equation of a combination of definite values that include the second bit rate, the pre-determined maximum allowed transmission latency, a discrete multi-tone symbol duration, a number S 1 of symbols of the first noise phase transmitted during a number C of noise clock cycles, and a number S 2 of symbols of the second noise phase transmitted during the number C of noise clock cycles.