Patent ID: 8014481
Filing Date: 2011-09-06
Classification: H04L

Abstract:
1. A method for recovering a data rate of an upstream transmission having rising edge transitions and falling edge transitions, the method comprising: a) providing the upstream transmission to a plurality of register banks, each register bank to oversample the upstream transmission at a different phase offset of a clock signal; b) determining an edge transition state for each of the register banks, each edge transition state corresponding to either a rising edge transition or a falling edge transition in the upstream transmission over a clock cycle; c) analyzing the edge transition states of the register banks to determine a sampling point of the clock signal for sampling the upstream transmission and to identify one of the plurality of register banks as corresponding to the determined sampling point, wherein the upstream transmission comprises a plurality of upstream burst transmissions each having a header and a payload and each transmitting at a different data rate, and the method further comprises; performing a)-c) with the clock signal at a first clock rate; and simultaneously performing a)-c) with the clock signal at a second clock rate different than the first clock rate.