Adaptive FEC codeword management

Details Adaptive FEC codeword management Adaptive FEC codeword management

2004-03-08

2008-09-23

Chaudry, Mujtaba K (Department: 2112)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Error count or rate

C714S774000

Reexamination Certificate

active

07428669

ABSTRACT:
Adaptive FEC coding is used to adjust the codeword composition of FEC codewords in a communication system. A codeword composition ratio may be adjusted in response to variance of a measured transmission error value from a target transmission error value in the system. The codeword composition ratio may be any quantity or value that represents the relation between the payload and parity bytes in the applicable FEC coding scheme. Adjustment of the codeword composition ratio may be adjusting parameters such as the N, K and/or R values in ADSL1 systems or the INP and/or maximum interleaving delay values in ADSL2 systems. A controller may be used to monitor, analyze and adjust the various values used in adaptively managing FEC coding. The present invention may be implemented in a transmission system in which a transmitter transmits data to a receiver via a transmission channel, such as a DSL system.

REFERENCES:
patent: 4733395 (1988-03-01), Gelbrich et al.
patent: 4901319 (1990-02-01), Ross
patent: 5023872 (1991-06-01), Annamalai
patent: 5450420 (1995-09-01), An et al.
patent: 5510917 (1996-04-01), Corke et al.
patent: 5533012 (1996-07-01), Fukasawa et al.
patent: 5541955 (1996-07-01), Jacobsmeyer
patent: 6067646 (2000-05-01), Starr
patent: 6240126 (2001-05-01), Ohashi et al.
patent: 6272652 (2001-08-01), Starr
patent: 6310909 (2001-10-01), Jones
patent: 6449288 (2002-09-01), Chari et al.
patent: 6536001 (2003-03-01), Cai et al.
patent: 6546509 (2003-04-01), Starr
patent: 6598188 (2003-07-01), Locke et al.
patent: 6629249 (2003-09-01), Gonzalez
International Search Report, International Application No. PCT/IB2004/003961 (4 pgs).
Written Opinion of the International Searching Authority, International Application No. PCT/IB2004/003961 (6 pgs).
D. Veithen et al., “A 70Mb/s Variable-Rate DMT-Based Modem for VDSL,” 1999 IEEE International Solid-State Circuits Conference; ISSCC99/Session 14/Paper TP 14.6, Feb. 15, 1999 (pp. 248-249, as provided by International Searching Authority). Reference No. XP-002184687.
ITU-T “Recommendation G.992.1” Asymmetric digital subscriber line (ADSL) transceivers, Series G, Jun. 1999, (pp. 226-239, as provided by International Searching Authority). Reference No. XP-002321806.
N. Nedev et al., “Comparison between Interleaving and Multiple DMT Symbols per Respectfully Submits Codeword in ADSL Systems,” Globecom 2002—IEEE Global Telecommunications Conference; Taipei, Taiwan; Nov. 17, 2002 (pp. 2265-2269, as provided by International Searching Authority). Reference No. XP-010636152.
F. Moulin et al., “Discrete-multitone-based ADSL and VDSL systems performance analysis in an impulse noise environment,” IEEE Proceedings: Sci. Meas. Technol., vol. 150, No. 6, Nov. 3, 2003 (pp. 273-278, as provided by International Searching Authority). Reference No. XP-006024286.
Starr et al., “Proposed revisions to G.992.4 and G.992.3&5 regarding impulse noise protection,” Study Group 15, ITU—Telecommunication Standardization Sector; San Francisco, CA; Mar. 8, 2004 (6 pgs).
Cioffi et al., “Low-Latency Impulse Elimination,” Committee T1, Working Group T1E1.4 (DSL Access); Atlanta, GA; Apr. 8, 2002 (13 pgs)—Paper (5 pgs) and PowerPoint slides (8 pgs).
Starr et al., “Information comment solicitation on ITU FEC INP submission for ADSL2,” Committee T1, Working Group T1E1.4 (DSL Access); Vancouver, BC; Feb. 23, 2004 (16 pgs)—Paper (7 pgs) and PowerPoint slides (9 pgs).
img id="CUSTOM-CHARACTER-00001" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” Broadband World Forum; London, England; Sep. 10, 2003 (17 pgs).
Starr et al., “DSL Advances,” Chapters 3, 7 and 11; Prentice-Hall, 2003 (173 pgs).
img id="CUSTOM-CHARACTER-00002" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” Alcatel DSL Forum presentation; Paris, France; Nov. 11, 2003 (47 pgs).
img id="CUSTOM-CHARACTER-00003" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” Deutsche Telecom DSL presentation; Darmstadt, Germany; Oct. 6, 2003 (37 pgs).
img id="CUSTOM-CHARACTER-00004" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” IEEE Globecom presentation; San Francisco, California; Dec. 3, 2003 (30 pgs).
img id="CUSTOM-CHARACTER-00005" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” Telecom Italia presentation; Turin, Italy; Nov. 19, 2003 (32 pgs).
img id="CUSTOM-CHARACTER-00006" he="2.79mm" wi="2.12mm" file="US07428669-20080923-P00001.TIF" alt="custom character" img-content="character" img-format="tif" ?Cioffi, “Dynamic Spectrum Management,” Korea Telecom DSL presentation; Seoul, Korea; Sep. 24, 2003 (38 pgs).

Affiliated with

Also associated with

Rating

Adaptive FEC codeword management does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive FEC codeword management, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive FEC codeword management will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3983464