Error detection/correction and fault detection/recovery – Pulse or data error handling – Skew detection correction
Reexamination Certificate
2006-05-23
2006-05-23
Decady, Albert (Department: 2133)
Error detection/correction and fault detection/recovery
Pulse or data error handling
Skew detection correction
C714S025000, C714S044000
Reexamination Certificate
active
07051246
ABSTRACT:
A method for calculating an estimate of the clock skew between a sender's clock and a receiver's clock in a packet-based communications network. An adaptive algorithm is employed in which a recursive least squares approach is used to calculate an estimate of the clock skew based on the transmission of a given (i e., the “current”) packet, which estimate is further based on a previous estimate thereof (“a first approximation” thereof). This illustrative process then iterates with each new packet, producing increasingly accurate estimates of the clock skew.
REFERENCES:
patent: 5381416 (1995-01-01), Vartti et al.
patent: 6327274 (2001-12-01), Ravikanth
patent: 6470483 (2002-10-01), Rodriguez et al.
patent: 6661810 (2003-12-01), Skelly et al.
O. Hodson, C. Perkins, and V. Hardman, “Skew detection and compensation for Internet audio applications,”in Proc. IEEE ICME, 2000, vol. 3, pp. 1687-1690.
S.B. Moon, P. Skelly, and D. Towsley, “Estimation and removal of clock skew from network delay measurements,” inProc. IEEE INFOCOM, 1999, vol. 1, pp. 227-234.
T. Trump, “Estimation of clock skew in telephony over packet switched networks,” inProc. IEEE ICASSP, 2000, vol. 5, pp. 2605-2609.
P. Deleon and C.J. Sreenan, “An adaptive predictor for media playout buffering,” inProc. IEEE, ICASSP, 1999, vol. A6, pp. 3097-3100.
H. Schulzrinne and J. Rosenberg, “The IETF internet telephony architecture and protocols,”IEEE Network, vol. 13, pp. 18-23, May/Jun. 1999.
Alphonse Fritz
Brown Kenneth M.
De'cady Albert
Lucent Technologies - Inc.
LandOfFree
Method for estimating clock skew within a communications... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for estimating clock skew within a communications..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for estimating clock skew within a communications... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3587267