Pmc-Sierra, Inc.

Pmc-Sierra US, Inc.

Andrew Milton Hughes

Carl Dietz McCrosky

Winston Ki-Cheong Mok

Kenneth Evert Sailor

Winston K Mok

Jeffrey Scott Roe

Nicholas Wayne Rolheiser

Douglas Konkin

Nick Rolheiser

Paul Edmund Somogyi

James Ames Meacham, Ii

A method and an apparatus for reducing power consumption and digital logic noise in a time division multiplexed memory switch. The method is embodied in an egress selection switch (ESS) block architecture. The ESS block includes a data disable block which prevents the propagation of data, in particular ingress grains, to a given group of egress ports if the data is not selected by any of the egress ports in a given group. While the ingress data disable method partitions ports into groups and saves power by disabling the fanout tree from the root on a port group basis, the egress data disable method saves power on a port group basis by disabling the fanout tree from the tail end in addition to applying the ingress data disable method. The ESS block also includes an grain select block for selecting and storing a given ingress grain for eventual output to an egress port.

Egress selection switch architecture with power management

A method of adding a new connection (c, d) to a time:space:time switch fabric. The fabric has a set I of k input elements, a set M of m switch elements, and a set O of l output elements. Each input element contributes one input to each switch element, and each output element receives one output from each switch element. A state Scharacterizes the switch elements as a set of ordered pairs (i, j), where (i, j) &#x3b5; Sif and only if the joutput element is coupled to the iinput element through one of the switch elements. The range of Sis the set of outputs of Ssuch that if j &#x3b5; range(S) then (i, j) &#x3b5; Sfor some i &#x3b5; I. The domain of Sis the set of inputs of Ssuch that if i &#x3b5; domain(S) then (i, j) &#x3b5; Sfor some j &#x3b5; O.

Bipartite graphical connecting scheduling in time and space switch fabrics

A time:space:time switch fabric incorporating an odd integer number of spatially distributed data switches and a plurality of spatially distributed data serializers. Each data switch has a first plurality of ingress ports, an equal plurality of egress ports, and a space switch for selectably interconnecting any one of the ingress ports to any one of the egress ports. Each data serializer has an input bus for receiving signals to be routed through the switch fabric, an output bus for outputting signals routed through the switch fabric, a plurality of egress ports selectably connectible to any one of the data switch ingress ports, and an equal plurality of ingress ports selectably connectible to any one of the data switch egress ports. The ingress/egress ports are characterized by:

Flexible, self-aligning time and space switch fabrics

Growing community of inventors

Saskatoon, Canada

Andrew Milton Hughes