Patent ID: 7907658
Filing Date: 2011-03-15
Classification: H04L

Abstract:
1. A method of resolving a signal-to-noise (SNR) margin difference between fast and interleaved channels in a dual latency discrete multi-tone (DMT)-based digital subscriber line (DSL) communication system comprising: dividing a communication channel into a plurality of equal bandwidth sub-channels; determining the transmission characteristics of each sub-channel; establishing two data paths from the sub-channels, wherein the data paths have different target SNR margins; allocating data having a relatively higher SNR margin near band edges between upstream and downstream data bands on the communication channel and allocating data having a relatively lower SNR margin away from these band edges, wherein establishing two data paths from the sub-channels comprises establishing at least a relatively fast data path and a relatively slower data path, wherein establishing a relatively fast data path comprises establishing a data path having a relatively higher bit error rate than the relatively slower data path, wherein data to be transferred over the relatively slower data path is allocated to tones near the band edge; and backing off a pre-determined number of tones at the band edges in the data path having the relatively higher bit error rate.