H - Electricity – 04 – L
Patent
H - Electricity
04
L
H04L 12/56 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 2229577
A scheduling device for use in a packet-switched network, belonging to the class of non-work conserving or idling weighted round robin (WRR) arbiters, assigns a new connection N new slots in a fixed-length repeating scheduling frame by selecting free slots which are close to idealized slots that would, if assigned, eliminate fitter or cell delay variation. The scheduler is able to simultaneously determine if a new constant bit rate connection requiring a predetermined bandwidth conforms to a leaky bucket or GCRA algorithm characterized by a peak packet or cell emission interval T=1/PCR and a packet or cell delay variation time, CDVT, i.e., whether the new connection is GCRA (T, CDVT) conformant. This determination is made by comparing the quantity ME + ML against the CDVT, where ME is a time equivalent to the maximum number of slots by which any assigned slot is earlier than a corresponding ideal slot and ML is a time equivalent to the maximum number of slots by which any assigned slot is later than a corresponding ideal slot. The scheduler can thus also carry out connection admission control (CAC) functions in an ATM network switch.
Davis Tom
Hung Anthony
Pezeshki-Esfahani Hossain
Blake Cassels & Graydon Llp
Davis Tom
Hung Anthony
Newbridge Networks Corporation
Pezeshki-Esfahani Hossain
LandOfFree
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