Ciena Corporation

Nortel Networks Corporation

Stuart C White

Sitaram Patro

Craig Donald Suitor

Christopher John Brown

Matthew Yuen

Alexander Young

Reshad Rahman

Kenneth Edward Neudorf

Richard Vallee

Bernard St Denis

Douglas H Patriarche

A network element includes at least two Time Division Multiplexing (TDM) modules each including a TDM client interface, TDM processing circuitry, and circuit emulation circuitry; and a packet switch fabric connected to the at least two TDM modules in a Link Aggregation Group (LAG) for a protected TDM service, and configured to output a packet interface, wherein the protected TDM service is provided as a single packetized TDM stream via the packet interface from the packet switch fabric.

Legacy time division multiplexing (TDM) service support in a packet network and on a packet network element

A network element includes at least two Time Division Multiplexing (TDM) modules each including a TDM client interface, TDM processing circuitry, and circuit emulation circuitry; and a packet switch fabric connected to the at least two TDM modules and configured to output a packet interface, wherein a protected TDM service through the at least two TDM modules is provided as a single packetized TDM stream via the packet interface from the packet switch fabric.

Systems and method include receiving counter update requests that are at a maximum frequency of f; sending the counter update requests to a main block of counters that operate at a maximum frequency of f, where (f)&#x2265;(f)/2; and responsive to a block of the main block of counters experiencing an overflow, sending corresponding counter update requests for the block of the main block of counters experiencing the overflow to a cache counter block that operates at a maximum frequency of f, where (f)&#x2265;(f) and (f)&#x2265;(f)&#x2212;(f). The counter update requests can be for Y&#xd7;K total counters, and the main block of counters can include Y blocks of counters each block having K counters, Y and K are positive integers. (f)&#x2265;(f)/2 ensures only one block of the main block of counters overflows simultaneously.

Reducing resource requirements for high-frequency counter arrays

A data traffic policer includes a classifier for separating a packet stream in accordance with class, a first bucket for a first traffic class representing a first transmission rate and a first burst capacity and a plurality of second buckets for a plurality of second traffic classes representing a corresponding second transmission rates and a second burst capacities, the plurality of second buckets being nested within the first bucket thereby being subordinate to the rate and capacity of the first bucket, with the rate of the second bucket being disabled when a fill condition exists in the first bucket. The second bucket for a second traffic class may include a plurality of buckets for a corresponding plurality of traffic classes, with each bucket of the plurality of buckets having a corresponding capacity and rate. The rate defined as a corresponding weight.

Data traffic policer

In ATM networks, digital data in ATM cells are sent to a destination node over a connection made up of more than one transmission link in round robin fashion. This is called inverse multiplexing. Suitable transmission links are selected among a plurality of provisionable transmission links according to some selection criteria. According to some embodiments of the invention, the selection criteria are minimum delay and maximum bandwidth.

Growing community of inventors

Nepean, Canada

Stuart C White