Fast initialization using seamless rate adaptation

Abstract

A method for initializing modems in a multicarrier transmission system to establish a communication link between the transmitter and the receiver. An exemplary embodiment includes the steps of providing a predetermined parameter value that approximates a corresponding actual parameter value of the communication link, establishing a data communication link between a first transceiver and a second transceiver using the predetermined parameter value to allow the transmission of data, determining the actual parameter value, and seamlessly increasing the data rate of the established data communication link by using the determined actual parameter value to provide an steady state communication link with an updated data rate.

Description

RELATED APPLICATION DATA [0001] This application is a divisional application of U.S. application Ser. No. 10 / 459,535 entitled “Fast Initialization Using Seamless Rate Adaptation,” filed Jun. 12, 2003 which is a Divisional of U.S. application Ser. No. 10 / 046,192, entitled “Fast Initialization Using Seamless Rate Adaptation,” filed Jan. 16, 2002 which claims the benefit of and priority to U.S. Provisional Application Ser. No. 60 / 262,240, filed Jan. 16, 2001, entitled “Fast Initialization Using Seamless Rate Adaptation,” and is related to U.S. patent application Ser. No. 09 / 522,870, filed Mar. 10, 2000, entitled “A Method for Seamlessly Changing Power Modes and ADSL Systems,” U.S. patent application Ser. No. 09 / 522,869, filed Mar. 10, 2000, entitled “Seamless Rate Adapted Adaptive Multicarrier Modulation System and Protocols,” U.S. patent application Ser. No. 09 / 523,086, filed Mar. 10, 2000, entitled “A Method for Synchronizing Seamless Rate Adaptation,” and U.S. patent application Ser...

AI Technical Summary

Benefits of technology

This approach significantly reduces the initialization time to less than 1 second, enabling rapid transition to a data communication state and optimizing the communication link while maintaining data transmission, thus minimizing service disruptions.

Problems solved by technology

This delay of approximately 10 seconds is viewed by many users, equipment providers and service providers as a negative aspect of ADSL service since it means that every time the ADSL link is established or reconnected after a loss of synchronization, the user must wait approximately 10 seconds for the complete initialization to finish prior to using the system.

Moreover, as also noted previously, this initialization period not only occurs during the initial powering of the system, but also when two communicating modems enter a state of mismatched transmission parameters which result in data being received, for example, in error.

This results in numerous 10 second delays if the two communicating modems are prone to entering a state of mismatched transmission due to changes in line quality, interference, or the like.

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