Channel monitoring for improved parameter selection in a communication system

• US 7,315,573 B2
• Filed: 10/18/2002
• Issued: 01/01/2008
• Est. Priority Date: 02/28/2002
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Texas Instruments, Inc.
• Inventors: Sommer, Naftali, Bitran, Yigal, Shalvi, Ofir, Reznic, Zvi, Lusky, Itay, Yagil, Ariel, Wajcer, Daniel, Haim, Eli, Bendel, Yosef
• Primary Examiner(s): PHU, PHUONG M
• Application Number:
  US10/273,556
• Publication Number:
  US 20030179821A1
• Time in Patent Office: 1,901 Days
• Field of Search: 375/224, 375/261, 375/225, 375/340, 714/708, 455/455, 370/335, 370/465
• US Class Current: 375/224
• CPC Class Codes: H04L 1/0001 Systems modifying transmission characteristics according to link quality, e.g. power backoff adaptive data allocation for multicarrier modulation H04L5/0044; controlling transmission power for radio systems H04W52/04
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0017 where the mode-switching is based on Quality of Service requirement
• CPC Class Codes: H04L 1/0019 in which mode-switching is based on a statistical approach
• CPC Class Codes: H04L 1/20 using signal quality detector
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

A method is provided for automatically improving throughput of an active channel in a communication system comprising: receiving input from one or more modules that identify and characterize impairments in the active channel; monitoring the input to track changes in the impairments; and changing channel parameters to improve throughput on the channel based on the changes in the impairments. Other systems and methods are disclosed.

Claims

1. A method to automatically optimize channel throughput using current constellation size in a communication system having a set of current forward error parameters and a current data rate comprising:

receiving input from one or more modules dedicated to identify and characterize impairments in the channel;

analyzing the impairments to generate statistics on occurrences of impairments by virtually considering a plurality of forward error correction (FEC) parameters;

searching for a set of new forward error correction parameters which provide maximal channel throughput;

choosing a frame error target;

estimating a new frame error rate and a new data rate for the set of new forward correction parameters based on the impairments statistics; and

replacing the current forward error correction parameters with the new forward error correction parameters if the new data rate is greater than the current data rate and the new frame error rate is lower than the frame error target.

2. The method of claim 1 wherein the searching is a simple sequential search.

3. The method of claim 1 wherein the searching is a regular binary search.

4. The method of claim 1 wherein the searching is an interleaver based binary search.

5. The method of claim 1 wherein the forward error correction parameters are Reed-Solomon code parameters.