Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Qualcomm Incorporated

Centre National De La Recherche Scientifique

Christophe Layer

Esteban Cabanillas

Philippe Boucard

Virgile Javerliac

Antoine Dupret

Jean-Pierre Nozieres

Luc Montperrus

Ameline Le Rouzic

Mickael Cartron

Suzie Marin

Pierre Paoli

This disclosure provides systems, methods, and devices for enhancing data communication and computation efficiency in Systems on a Chip (SoC). In one aspect, a system is provided that uses a network on a chip (NOC) to route communications between chip components using a plurality of network interfaces linked by shared data connections. The system may be configured to route communications via multiple virtual channels along the shared connections, with credit restrictions for the channels. Additionally, the system may support mechanisms for maintaining both private and shared credit balances for these virtual channels. Additional aspects are also discussed.

Data routing for networks on a chip using virtual channels and credit restrictions

Data may be communicated from a sender device to a receiver device over enabled or selected byte positions or other data bit groups of a data bus. The sender device may determine data values to be sent over the data bus and may determine which byte positions are enabled or selected and which are not selected. The sender device may also determine a code. The code may be a value that is not included in the data values to be sent over the data bus. The sender device may then send the selected data values in selected byte positions of the data bus and send the code in non-selected byte positions of the data bus. The sender device may also send the code to the receiver device separately from the data bit lanes of the data bus.

Encoding byte information on a data bus with separate code

A reflectometry system for the analysis of faults in a transmission line into which a complex signal, generated then modulated, has been injected, includes a means for measuring the modulated complex signal propagating in the transmission line, a demodulator of the measured signal designed to produce a demodulated complex signal, a complex correlator configured for correlating the demodulated complex signal with a copy of the generated complex signal, in order to produce a first time-domain reflectogram corresponding to the real part of the complex correlation and a second time-domain reflectogram corresponding to the imaginary part of the complex correlation, a module for joint analysis of the first time-domain reflectogram and of the second time-domain reflectogram for identifying the presence of faults in the transmission line.

System for detecting faults in a transmission line by using a complex signal

A method and device for detecting faults in a transmission line by reflectometry, include the following steps: injecting into the transmission line a reference signal at an emission frequency f; collecting a reflected signal at a point on the transmission line; sampling the reflected signal at a sampling frequency f, the sampling frequency fbeing different from the emission frequency f; storing each point of the sampled signal at a memory address corresponding to an index assigned to the point of the sampled signal and according to a precomputed memory-address increment &#x394;, the memory-address increment &#x394; depending on the emission frequency f, on the sampling frequency f, on an over-sampling factor &#x3a9; and on a preset acquisition time &#x3a3;; repeating the storing step during the acquisition time &#x3a3;; and generating, from the points stored during the acquisition time, a recomposed signal able to be used to detect faults.

Method and device for detecting faults in a transmission line

A reflectometry system includes at least one measurement means for measuring a reference signal retro-propagated in at least one transmission line, at least one analog-digital converter for converting at least one measured signal into a set of at least one first digital signal and one second digital signal, at least one complex correlator configured to correlate the real reference signal with a complex signal whose real part is formed by a first digital signal of the set and whose imaginary part is formed by a second digital signal of the set, so as to produce a first reflectogram corresponding to the real part of the complex signal and a second reflectogram corresponding to the imaginary part of the complex signal, an analysis module for analyzing at least the first reflectogram and the second reflectogram so as to identify the presence of defects in at least one transmission line.

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Paris, France

Christophe Layer