The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 27, 2010
Filed:
Jun. 10, 2008
Nicholas Duffield, Summit, NJ (US);
Edith Cohen, Berkeley Heights, NJ (US);
Haim Kaplan, Hod Hasharon, IL;
Carsten Lund, Berkeley Heights, NJ (US);
Mikkel Thorup, Florence, MA (US);
Nicholas Duffield, Summit, NJ (US);
Edith Cohen, Berkeley Heights, NJ (US);
Haim Kaplan, Hod Hasharon, IL;
Carsten Lund, Berkeley Heights, NJ (US);
Mikkel Thorup, Florence, MA (US);
AT&T Intellectual Property I, L.P., Reno, NV (US);
Abstract
The invention relates to streaming algorithms useful for obtaining summaries over unaggregated packet streams and for providing unbiased estimators for characteristics, such as, the amount of traffic that belongs to a specified subpopulation of flows. Packets are sampled from a packet stream and aggregated into flows and counted by implementation of: (a) Adaptive Sampled NetFlow (NF), and adjusted weight (A) of a flow (f) is calculated as follows: A(f)=i(f)/p'; i(f) being the number of packets counted for a flow f, and p′ being the sampling rate at end of a measurement period; or (b) Adaptive Sample-and-Hold (SH), and adjusted weight (A) of a flow (f) is calculated as follows: A(f)=i(f)+(1−p′)/p′; i(f) being the number of packets counted for a flow f, and p′ being the sampling rate at end of a measurement period.