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:
Sep. 18, 2007
Filed:
Mar. 27, 2002
Brian Unitt, Bishops Stortford, GB;
Michael Grant, Bishops Stortford, GB;
David Phillips, Bishops Stortford, GB;
Matthew Allen, Old Harlow, GB;
Brian Unitt, Bishops Stortford, GB;
Michael Grant, Bishops Stortford, GB;
David Phillips, Bishops Stortford, GB;
Matthew Allen, Old Harlow, GB;
Nortel Networks Limited, St. Laurent, Quebec, CA;
Abstract
A method and apparatus for filtering data packets in a shared-medium or point-to-multipoint communications network. A filter unit is sent a data packet carrying a filter tag value in a packet addressed to the filter unit. The value is stored in the filter unit and subsequently received packets not addressed to the filter unit itself are forwarded only if they carry the stored filter tag. An embodiment of particular interest applies the method to Ethemet frames over a telecommunications access network (including optical or wireless networks), and uses the VLAN tag field to carry the filter tag information.