Fujitsu Corporation

Fujitsu Network Communications, Inc.

Crestron Electronics, Inc.

Michael Philip Bottiglieri

Michael J Samori

Frank Schumeg

Sanjay Sharma

Mario Romana

Shilin Wang

Chemin Hsieh

Mark LaBosco

Jaya Sarup

Nitin Gogate

Agesino Primatic

Sheng Wu

Zafrir Babin

Wendy Lao

Pawan Kumar Dhanrajani

Dorin Dogaroiu

Presented are a system and method for distributing video over a network. The system includes a source that outputs video with a first frame rate, a transmitter, a receiver, and a sink. The transmitter receives video from the source and processes the video by encoding the video with frame boundary information, packetizing, and transmitting the video. The receiver includes a frame buffer, a timing generator, and a PLL. The receiver receives and processes the video by retrieving the frame boundary information, decoding the video into sub-frames, and writing the sub-frames to the buffer. All the processing occurs on sub-frame portions of the video in sub-frame time intervals. The receiver transmits video with a second frame rate to the sink. The timing generator generates output timing and uses the PLL to synchronize the output timing with the frame boundary information and synchronizes the first and second frame rates.

Network video clock decoupling

A method may include receiving a stream of datagrams, the datagrams having a first bit length. The method may also include selecting a block of bits from consecutively-received datagrams, the block having a second bit length greater than the first bit length. The method may additionally include determining whether a particular data field is present at a particular bit position within the block. The method may further include outputting the block as a valid block in response to determining that the particular data field is present at the particular bit position. The method may additionally include, in response to determining that the particular data field is not present at the particular bit position: discarding a received datagram from the stream of datagrams; and repeating the receiving, selecting, determining, and discarding steps until a determination is made that the particular data field is present at the particular bit position.

Methods and systems for block alignment in a communication system

RPR traffic management concepts are extended to individual client flows while adhering to the station level traffic management functions by using a two tiered shaper approach. The first tier manages the client level SLAs and feeds the second tier which provides the aggregate station level traffic management functions. This approach allows sharing of a single RPR station without the compromises and side affects associated with the other techniques. Apparatus for Resilient Packet Ring traffic management comprises a stage queue selection block operable to hold client and control traffic for transmission, a queue level traffic shaper operable to control an add rate of client data add traffic and to provide queue specific send indications to the stage queue selection block, and a ringlet level traffic shaper operable to control traffic flow for a Resilient Packet Ring ringlet and to provide aggregate send indications to the stage queue selection block.

Two tier traffic shaper approach for resilient packet ring stations

A method and system for communicating traffic on an emulated subnetwork of a telecommunications ring having a plurality of nodes interconnected by a transmission media includes obtaining traffic at a node on the telecommunications ring. The traffic is segmented into a plurality of discrete segments. A set of broadcast cells is generated by adding an address header to each segment. The address header identifies a virtual channel dedicated to the node on the subnetwork in the telecommunications ring. The set of broadcast cells are transmitted in the virtual channel of the subnetwork and within a frame of the telecommunications ring. At each remaining node on the telecommunications ring, in response to receiving the set of broadcast cells in the virtual channel, both retransmitting and processing the broadcast cells.

Method and system for providing broadcast channels over an emulated subnetwork

The capability to handle the 100 &#x3bc;s RPR interrupt and similar interrupts is provided by servicing selected interrupts outside of the operating system. This drastically reduces the latency and overhead associated with servicing the interrupt. A method of handling an interrupt in a computer system comprises receiving the interrupt at the computer system, determining whether the interrupt is a selected interrupt, and performing interrupt processing not involving an operating system of the computer system, if the interrupt is a selected interrupt.

Minimizing ISR latency and overhead

In a usage parameter control device for an asynchronous transfer mode communications system, a determination is made as to whether either of the respective storage elements maintaining values for (1) the time of arrival of a cell (Tand (2) the time value at which the 'bucket' will have drained to an empty condition (T) has wrapped relative to the other. The wrap determination is made prior to the comparison between the Tand Tvalues which is made in order to determine whether the user is complying with his or her contracted parameters. If one of the storage elements has wrapped relative to the other, the comparison between the Tand Tvalues is modified accordingly.

Usage parameter control device for asynchronous transfer mode system

In a usage parameter control device for an asynchronous transfer mode communications system, a determination is made as to whether either of the respective storage elements maintaining values for (1) the time of arrival of a cell (T ) and (2) the time value at which the &ldquo;bucket&rdquo; will have drained to an empty condition (T ) has wrapped relative to the other. The wrap determination is made prior to the comparison between the T and T values which is made in order to determine whether the user is complying with his or her contracted parameters. If one of the storage elements has wrapped relative to the other, the comparison between the T and T values is modified accordingly.

In a usage parameter control device for an asynchronous transfer mode communications system, a time counter is divided into multiple phases to enable audits of each of the virtual connections being handled by the system to be performed on a staggered group-by-group basis rather than all at once, thereby avoiding excessive delays in cell processing.

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River Vale, NJ, United States of America

Michael Philip Bottiglieri