Patent ID: 6222888
Filing Date: 2001-04-24
Classification: H04L

Abstract:
A circuit for use in a high speed multi-channel transmission system, which system is intended to transmit data at a rate R using K sub-channels through a channel having varying transmission characteristics, said circuit comprising:a sub-channel parameter memory for storing data capacities associated with some or all of said sub-channels, including initial data capacities and adapted data capacities; anda processing unit which can perform a configuration procedure to generate said initial data capacities to configure said system to operate at the data rate R; andsaid processing unit being further configured to repeat said configuration procedure later during a data transmission to generate said adapted data capacities when significant changes are required in the data rate R based on an evaluation of one or more of the following parameters:(a) signal-to-noise ratio for the K sub-channels;(b) variations in said transmission characteristics;(c) variations in said data rate; and(d) a specified allowable system adaptation time period; andwherein the processing unit executes the configuration procedure until said data rate is achieved or until a specified iteration criteria parameter is satisfied and thereafter repeatedly executes said configuration procedure as needed to maintain the data rate R.