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:
Jun. 13, 2006
Filed:
Sep. 10, 2001
Alain Blanc, Tourrettes-sur-Loop, FR;
Bernard Brezzo, Nice, FR;
Rene Gallezot, La Colle sur Loup, FR;
Franco Le Maut, Nice, FR;
Thierry Roman, Nice, FR;
Daniel Wind, Drap, FR;
Alain Blanc, Tourrettes-sur-Loop, FR;
Bernard Brezzo, Nice, FR;
Rene Gallezot, La Colle sur Loup, FR;
Franco Le Maut, Nice, FR;
Thierry Roman, Nice, FR;
Daniel Wind, Drap, FR;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A data switch is provided which routes fixed-size data packets from input ports to output ports, using shared memory which holds a copy of each packet in buffers. Output ports have a queue which contains pointers to buffers holding packets bound for that port. The number of shared memory buffers holding packets is compared to the number of buffer pointers in the output queues. In this way, a Multicast Index (MCI), a metric of the level of multicast traffic, is derived. The switch includes a Switch Core Adaptation Layer (SCAL) which has a multicast input queue. Because traffic is handled based on priority class P, a multicast threshold MCT(P), associated with the multicast input queue, is established per priority. While receiving traffic, the MCI is updated and, for each priority class in each SCAL, the MCI is compared to the MCT(P) to determine whether corresponding multicast traffic must be held.