| ... | ... | @@ -261,3 +261,62 @@ and the GPS-PMU, showing WR’s applicability for PMUs. The developed |
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system can be used as an alternative for specific conditions where the
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GPS signal is not available.
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## Seven Solutions and University of Granada
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### White-Rabbit-enabled Data Acquisition System development by UGR
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UGR is evaluating the feasibility of using White Rabbit technology to
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discipline all the clock domains of a data acquisition system. Existing
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systems provide synchronization capabilities, albeit the performance
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achieved is often not accurate enough for scientific infrastructure and
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high-end industrial applications. White Rabbit networks are known for
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their sub-nanosecond accuracy attained with fiber-optic Ethernet links.
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By integrating an existing open hardware data acquisition FMC card into
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a White Rabbit node, we show that it is possible to tag the acquired
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data in a deterministic manner without loss of timing performance. This
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result can be the first step towards a multi-device, remotely operated
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synchronized data acquisition. Extended OS support as well as the
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utilization of middlewares as DDS for achieving high QoS are also under
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study.
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### Research on redundant topologies based on the HSR protocol (Seven Solutions - UGR)
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UGR together with Seven Soltuions are about to finish the development of
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the High-availability Seamless Redundancy (HSR, IEC 62439-3) protocol
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for WR devices in order to increase the availability and robustness of
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the White Rabbit technology and thus, extend its utilization to
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industrial networks such as Smart Grid. Applications related to this
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field demand high availability and very short switch-over time. HSR
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guarantees zero-time recovery in case of failure in ring and mesh
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network topologies for both time and data frames and it is based on the
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duplication of frames in the network.
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UGR and Seven Solutions are finishing the implementation of the HSR
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protocol for WR devices, in particular the WR-Switch to increase
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availability and avoid single point of failure for time and data
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distribution. This work has been done in the framework of the European
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ARTEMIS JU EMC2 project (http://www.artemis-emc2.eu/) and involves the
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development of the Peer-2-Peer mechanism for clock propagation,
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PeerDelay for the delay measurement, the utilization of HSR tags in
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frames, and the Switch-over mechanism developed by CERN to recover from
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a node failure. Current progress and more information can be found at
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the OHWR WR-HSR webpage: https://www.ohwr.org/project/wr-hsr/wiki
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h3.WR upgrading for KM3NeT by Seven Solutions
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KM3NeT is a research infrastructure housing the next generation neutrino
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telescopes, which is located in the deepest seas of the Mediterranean.
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The topology of KM3NeT consists of final nodes (DOMs) and the shore
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station. The DOMs have unidirectional uplinks to reach the onshore
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station, while the shore station has a unique unidirectional downlink
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shared by all the DOMs. This topology reduces the communication
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resources cost, but it requires a higher customization level at the
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shore station.
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Seven Solutions has been upgrading the software and firmware for the WR
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switch to adapt the previous customization of KM3NeT from v3.3 to v4.2.
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These new modifications include deep changes in the PPSi module,
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including a modification of the WR standard, which uses bidirectional
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links to synchronize, a new monitoring tool, and the possibility to
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start up at least 150 final nodes in parallel with optimized start up
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times.
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