Pmc-sierra, Inc.

Pmc-sierra Us, Inc.

Microsemi Solutions (us), Inc.

Microsemi Storage Solutions, Inc.

Scott Arthur Muma

Winston Ki-Cheong Mok

Steven Scott Gorshe

Gregory Jacob Erker

Bernard Guay

Somu Karuppan Chetty

Victor Gusev Lesau

Karl Scheffer

Nicholas Wayne Rolheiser

Jeffrey Scott Roe

Nick Rolheiser

Norbert Diesing

Ian Gordon Barrett

Michael James Smith

Karim Arabi

The present disclosure relates to a system and method of encrypting and decrypting Optical Transport Network (OTN) payload content. A transmitter of the system includes a series of ordered encryption keys and a counter for generating an initialization vector to be combined with one of the encryption keys for encrypting the OTN payload content. A receiver of the system includes a series of ordered decryption keys and a counter for generating an initialization vector to be combined with one of the decryption keys for decrypting the encrypted OTN payload content. The system synchronizes switching, at the transmitter and the receiver, the encryption and decryption keys to the next keys in each series. The system also synchronizes the counters for generating the same initialization vector at the transmitter and the receiver.

Method and system for encrypting/decrypting payload content of an OTN frame

The voltage applied to an integrated circuit is scaled so as to account for variations in the manufacturing processes, temperature, and the like, and to allow for power/performance optimization of the integrated circuit. The integrated circuit may characterized during a manufacturing test or anytime thereafter. The characterization data, which reflects the performance and power consumption of the integrated circuit, is used to determine an associated processing/speed bin, which in turn, defines the voltage that will be applied to the integrated circuit during normal operation. Optionally, a number of different supply voltages are applied to different circuit blocks disposed in the same integrated circuit. Each such circuit block may have a different characterization data associated with a different supply voltage.

Apparatus and method to adjust power and performance of integrated circuits

Methods and systems are provided for controlling elements in a signal path of a communication network to accommodate changes in the rate of a client signal. In particular, during the bandwidth resizing (BWR) portion of ITU-T Recommendation G.7044 Hitless Adjustment of ODUflex(GFP) protocol (HAO), the nodes in the chain along the ODUflex(GFP) signal path change their output rates in parallel such that FIFO over/underflow is avoided in the nodes. Certain embodiments provide mechanisms to synchronize and stabilize the nodes in a verifiable manner.

Control and coordination of ODUflex bandwidth resizing operation

A method and apparatus are provided for reducing current demand variations in large fanout trees. The fanout tree is split into at least 2 sub-groups, each preferably with substantially equal parasitic capacitance. Data is then scrambled according to a scrambling sequence function to provide scrambled data having a constant number of bits that are toggled with respect to time, such as when observed in pairs of sub-groups. Functionally, an apparatus according to an embodiment of the present invention includes 3 blocks: a scrambler, egress logic, and a de-scrambler. The egress logic is simply a block of storage that can reorder the bytes received from the scrambler. The de-scrambler de-scrambles the retransmitted data based on the scrambling sequence function. Embodiments of the present invention can be applied to any system where data must fanout from a single source to many destinations, such as switches.

Method and apparatus for reducing current demand variations in large fan-out trees

A data detection system includes, in part, a CID detector, a DC balance monitor and a transition density detector. The CID detector is configured to detect whether the received data stream includes a CID exceeding a predetermined threshold count. The DC balance monitor is configured to detect DC imbalances in the incoming data and that may be indicative of errors in the data. The transition density detector is configured to detect whether a minimum transition density exists during a given time period. If a violation is detected by any one of these three detectors, an out-of-frame signal is asserted. The incoming data stream may be a scrambled SONET or SDH data stream.

Serial data validity monitor

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Coquitlam, Canada

Scott Arthur Muma