International Business Machines Corporation

Charles Louis Haymes

Dominick Anthony Zumbo

Jose A Tierno

Mark B Ritter

Benjamin D Parker

Dinesh C Verma

Douglas Morgan Freimuth

Charles P Wright

Brian Paul Gaucher

Sameh W Asaad

John Michael Tracey

Mohit Kapur

David P Olshefski

Albert X Widmer

Modest M Oprysko

Bernard V Brezzo

Ralph E Bellofatto

Richard H De Nijs

Richard Allan Auerbach

Dale T Ulmer

Thomas Roewer

Thomas R&ouml;wer

A plurality of target field programmable gate arrays are interconnected in accordance with a connection topology and map portions of a target system. A control module is coupled to the plurality of target field programmable gate arrays. A balanced clock distribution network is configured to distribute a reference clock signal, and a balanced reset distribution network is coupled to the control module and configured to distribute a reset signal to the plurality of target field programmable gate arrays. The control module and the balanced reset distribution network are cooperatively configured to initiate and control a simulation of the target system with the plurality of target field programmable gate arrays. A plurality of local clock control state machines reside in the target field programmable gate arrays. The local clock control state machines are coupled to the balanced clock distribution network and obtain the reference clock signal therefrom. The plurality of local clock control state machines are configured to generate a set of synchronized free-running and stoppable clocks to maintain cycle-accurate and cycle-reproducible execution of the simulation of the target system. A method is also provided.

Method and infrastructure for cycle-reproducible simulation on large scale digital circuits on a coordinated set of field-programmable gate arrays (FPGAs)

A data transmission system includes parallel data paths for transmitting data, and an encoder for encoding the data such that an error correction code is generated for data at a same bit position across the parallel data paths.

Data transmission system and method of correcting an error in parallel data paths of a data transmission system

A method and apparatus in accordance with the present invention provides monitoring a self-adjusting multi-tier processing system. At least one computing resource of one of the tiers of the self-adjusting multi-tier processing system is dynamically bypassed based on at least one predetermined criterion, wherein dynamically bypassing energizes or de-energizes a bypass control switch that operates to route data between tiers of the system in a manner that excludes the at least one computing resource.

Network element bypass in computing computer architecture

Alternate methods, devices and systems are presented for providing service providers and/or end users of mobile stations to monitor and/or report regions with high error rates and/or dead zones. A protocol is provided such as to yield the error occurrence, error rate and/or the address of the end user. In some embodiments it also contains location information and time of day information. This information may be collected from the G.P.S., and/or all or a portion of users when there is a significant transmission difficulty and/or an abundance of errors. The collected data forms a database which is analyzed to generate coverage maps. This may include the dynamic aspects of the mobile network. In another aspect of this invention, each mobile station periodically compares its current location with the data base. The results of this comparison enables the mobile unit to anticipate connection problems. In still another aspect of the invention, the comparison is performed by the service provider which notifies the end user.

Error correlation for wireless networks

An apparatus for data transfer using radio frequency (RF) energy, includes a first software application that sources and links the data transfer, a second software application for controlling a communications hardware for the data transfer, a hardware device for formatting the data and gaining access to a media, and a physical layer interface hardware, coupled to selectively receive a signal representing the data from the hardware device and to provide an output to the hardware device, for sending and receiving a radio frequency communication. The second software application for controlling the communications hardware uses a target data transmission media of infrared light.

Low-cost radio frequency (RF) link for point-to-point data transfer

A data framer capable of supporting at least two different data framing protocols potentially present in a source data stream includes two or more framing circuits and a controller coupled to the framing circuits. Each of the framing circuits is configured to extract user data from the source data stream in accordance with a different data framing protocol associated with the respective framing circuit. The controller is operative to: (i) receive the source data stream and automatically determine which of the at least two different data framing protocols corresponds to the source data stream; and (ii) route the source data stream to one of the first framing circuit and the second framing circuit in response to a match between the determined data framing protocol of the source data stream and one of the first and second data framing protocols.

Multi-protocol agile framer

A format converter in which the data input is a 16 bit wide interface. The circuit finds the 66-bit coding block boundaries. In one embodiment, a circuit presents the 66-bit data blocks at the output in an aligned format. The circuit relies on control inputs from a state machine which controls the operating mode and to which it delivers status information. The two main operating modes are the &ldquo;normal data&rdquo; mode or the &ldquo;hunt&rdquo; mode for the 66-bit block boundaries.

Format converter

A method and apparatus creates a virtual high bandwidth, bi-directional, communications link utilizing low and high bandwidth uni-directional links in opposite directions. The directions of the two uni-directional communications links can be dynamically reversed in response to changing traffic needs.

Method and apparatus for creating virtual high bandwidth data channels

A network port configurator device for automatically configuring a system having network workstations and corresponding network equipment of various physical protocols. The network port configurator comprises a plurality of input and output ports for receiving physical wiring to which the workstations and network equipment are attached. Detection circuitry attached to the input and output ports determine the physical protocol of the attached workstations and network equipment by determining a characteristic of the attached equipment. Examples of identifying characteristics include a characteristic impedance, a characteristic voltage, and a characteristic cable identification of the workstation. Logic circuitry uses this information to control a circuit switching mechanism that connects the input ports to the output ports.

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Wesley Hills, NY, United States of America

Charles Louis Haymes