Patent
Exascale fabric time synchronization
Thomas D. Lovett,Michael Parker,Mark S. Birrittella +2 more
- 16 Nov 2016
3
TL;DR: In this article, a master clock node is coupled to a plurality of slave nodes via a fabric comprising a plurality-of-switches and a pluralityof fabric links, wherein each slave node is connected to the master clock via a respective clock tree path that traverses at least one fabric switch.
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Abstract: Methods and apparatus for implementing time synchronization across exascale fabrics. A master clock node is coupled to a plurality of slave nodes via a fabric comprising a plurality of fabric switches and a plurality of fabric links, wherein each slave node is connected to the master clock node via a respective clock tree path that traverses at least one fabric switch. The fabric switches are configured to selectively forward master clock time data internally along paths with fixed latencies that bypass the switches' buffers and switch circuitry, which enables the entire clock tree paths to also have fixed latencies. The fixed latency of the clock tree path is determined for each slave node. The local clocks of the slave nodes are then synchronized with the master clock by using master clock time data received by each slave node and the fixed latency of the clock tree path from the master clock node to the slave node that is determined. Techniques for determining a clock rate mismatch between the master clock and a local clock is also provided.
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Citations
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A calculation method and a calculation system for maximum clock deviation
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References
Patent
Methods and apparatuses for maintaining synchronization between a radio equipment controller and an item of radio equipment
Garrick Thomas Irvine
- 22 Oct 2012
TL;DR: In this article, the authors present methods and apparatuses for maintaining radio network timing synchronization across an asynchronous communication link between a Radio Equipment Controller (REC) and an item of Radio Equipment (RE) (14).
60
Patent
Stealth packet switching
Wayne R. Howe
- 15 Mar 2013
TL;DR: In this paper, the authors describe the use of stealth packets, switches, networks, and methods to provide invisibility or cloaking by modifying previously existing standards rules for packet structures, protocols, timing, synchronization, and other elements.
50
Patent
Method and arrangement for local synchronization in master-slave distributed communication systems
Francois Abel,Alan F. Benner,Alain Blanc,Michel Colmant,Mitch Gusat,Michel Poret,Norbert Schumacher,Mark Verhappen +7 more
- 31 Mar 2003
TL;DR: In this article, the authors propose a synchronization scheme for data segments and control signals in a multiuser communication system, where one master module acts as master and the others are slave modules controlled by control signals derived by the master module.
33
Patent
Variable latency and bandwidth communication pathways
Andy Lambrecht,Alfred C. Hartmann +1 more
- 14 Nov 1997
TL;DR: In this article, a system and method for choosing communication pathways for data transfers on a computer chip based on desired latency and bandwidth characteristics is presented, where each device includes interface logic for accessing and performing transfers on the first and second buses.
30
Patent
Method and devices for time transfer using end to end transparent clocks
James Aweya
- 11 Dec 2014
TL;DR: In this paper, the authors proposed a simple linear approximation technique and a Kalman filter-based technique for estimating offset and skew of the slave clock, which has particular application in the alignment of slave clocks to a master clock and dealing with packet delay variations.
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