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:
Aug. 23, 2011
Filed:
Dec. 01, 2008
Nicholas Duffield, Summit, NJ (US);
Carsten Lund, Berkeley Heights, NJ (US);
Mikkel Thorup, Florence, MA (US);
Edith Cohen, Berkeley Heights, NJ (US);
Haim Kaplan, Hod Hasharon, IL;
Nicholas Duffield, Summit, NJ (US);
Carsten Lund, Berkeley Heights, NJ (US);
Mikkel Thorup, Florence, MA (US);
Edith Cohen, Berkeley Heights, NJ (US);
Haim Kaplan, Hod Hasharon, IL;
AT&T Intellectual Property I, LP, Atlanta, GA (US);
Abstract
The present invention relates to a method of obtaining a generic sample of an input stream. The method is designated as VAROPT. The method comprises receiving an input stream of items arriving one at a time, and maintaining a sample S of items i. The sample S has a capacity for at most k items i. The sample S is filled with k items i. An nitem i is received. It is determined whether the nitem i should be included in sample S. If the nitem i is included in sample S, then a previously included item i is dropped from sample S. The determination is made based on weights of items without distinguishing between previously included items i and the nitem i. The determination is implemented thereby updating weights of items i in sample S. The method is repeated until no more items are received.