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Synchronization Solutions for Railways / Metro Rail

Synchronization Solutions for Railways / Metro Rail. January 10, 2017. Index:. Network Architecture System Architecture

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Synchronization Solutions for Railways / Metro Rail

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  1. Synchronization Solutions for Railways / Metro Rail January 10, 2017

  2. Index: • Network Architecture • System Architecture • Primary Reference Master Clock System (ITU-T G.811 Compliant PRC for providing an ultra stable (Stratum 1) time-of-day reference and frequency reference for synchronizing SDH / SyncE transmission equipment) • SSU - Synchronization Supply Unit • Sub-Master Clocks • Digital Display Clocks • Network Management System (NMS) overview

  3. Applications: • Synchronizing Railway Signaling and Railway Communications • Distributing “Time (ToD)” and “Frequency” references across all nodes of the network • Synchronizing Wireless Networks : 2G, 3G and LTE Base Stations / Cellular Networks • Synchronizing Wireline Networks : SDH and SyncE equipment. • IEEE-1588v2 PTP Grandmaster Clock • IEEE-1588v2 PTP Grandmaster-Slave applications

  4. Network Architecture: • The Clock System shall provide Synchronized Stratum 1 Time and Frequency Reference • The Time Source for Central Node shall be obtained from GPS (which is an ITU-T G.811 PRC Compliant Source) • Synchronization of timing information of other systems shall be achieved through SSU, Sub-Master Clocks and NTP • The synchronized information shall be provided to other interfacing systems via OFC network • GPS / GNSS Time Source shall be used to synchronize Slave Clocks

  5. System Architecture – Sub-Page # 1: • Master (ITU-T Compliant G.811 PRC) Primary Reference Clock shall provide Synchronized Time and Frequency References • The Primary and the Secondary time source for Stations / Remote Stations shall be NTP Servers and Sub-Master Clocks, respectively • SSU shall filter accumulated frequency wander in the frequency synchronization chain

  6. System Architecture – Sub-Page # 2: • NTP Server shall be the Master Primary Reference Clock (ITU-T Compliant G.811 PRC) shall provide Synchronized Time and Frequency References • Sub-Master Clock synchronize with the Master Primary Reference Clocks to provide a “Time Reference” to all the “Slave” NTP elements at the Station level. It shall be the “Master Clock” to “Slave” NTP elements at the Station level • Digital Display Clocks will display time with milli-second accuracy at the various stations

  7. Typical Network Architecture

  8. Primary Master Clock System (G.811) - VCL-2145 VCL-2145: • PTP IEEE-1588v2 Grandmaster, Primary Reference Clock (G.811), NTP Server Product Highlights: • GPS / GNSS Time and Frequency Synchronization Solution • Optional 1+1 Redundant GPS Receiver for high-reliability applications (Model # VCL-2145-D) • G.811, Primary Reference Clock (PRC) • IEEE-1588v2 PTP Grandmaster Clock • High Capacity IPv4 and IPv6 NTP Server. Capable of handling up to 6000 NTP / SNTP Requests / Sec. • IRIG-B Precision Time Protocol (PTP) IEEE-1588v2 and NTP Ports: • 2 x 10/100/1000BaseT Network Interface - Ethernet (RJ45) Ports • 2 x 1000Base-X Network Interface – Optical Ethernet (SFP) Ports

  9. Block Diagram VCL-2145-D

  10. Specifications: Master Clock - VCL-2145-D Input Ports: • GPS / GNSS Receiver • 2.048 MHz, 75 Ohms (BNC) • 2.048 Mbit/s (E1) (BNC) • 10 MHz, 50 Ohms (BNC) Output Ports: • 1 x PTP Grandmaster • 8 x 2.048 Mbit/s (E1), or 8 x 1.544 Mbit/s (T1) • 8 x 2.048 MHz, • 1 x 1 MHz / 5 MHz /10 MHz, 50 Ohms, • 6 x IRIG-B • 1 x 1PPS • 1 x TOD (Time-Of-Day) output compliant to NMEA0183 (DB9, RS-232C) • IPv4 and IPv6 NTP Server • Optional - OCXO or Rubidium Oscillator for Holdover Clock

  11. SSU - Synchronization Supply Unit - VCL-2145-LC VCL-2145-LC: • G.811 (PRC) Primary Reference Clock Product Highlights: • GPS Time and Frequency Synchronization Solution • Primary Reference Clock (PRC) Input Ports: • GPS Receiver • 2.048 MHz, 75 Ohms (BNC) • 2.048 Mbit/s (E1) (BNC) • 10 MHz, 50 Ohms (BNC)

  12. SSU - VCL-2145-LC Output Ports: • 8 x 2.048 Mbit/s (E1), or 8 x 1.544 Mbit/s (T1) • 8 x 2.048 MHz, • 1 x 1 MHz / 5 MHz /10 MHz, 50 Ohms, • 1 x 1PPS • 1 x TOD (Time-Of-Day) output compliant to NMEA0183 (DB9, RS-232C) • Optional -OCXO or Rubidium Oscillator for Holdover Clock

  13. Sub-Master Clock – VCL-2103 • IPv4 and IPv6 compliant NTP Sub-Master Clock • NTP/SNTP Date and Time Synchronization • NTP Master-Slave Emulation • “Master-side” - 1 x 10/100/1000BaseT Ethernet as NTP Client • “Client-side” - 4 x 10/100BaseT Ethernet NTP/SNTP as Master • High-Performance NTP Server Engine • Capable of driving up to 1000, VCL-W-KLOX, NTP/SNTP Slave display devices • Remote Management over TCP-IP Network • Compact: 1U High, 19-Inch Rack Mounting Chassis • Dual, 1+1 Redundant 90VAC-240VAC, 50-60Hz or 48VDC Power Options

  14. Slave Clock (Digital) - VCL-2106 (VCL-W-KLOX) High Reliability Time Display Unit: • Available in 57mm, 100mm and 200mm Display size options • May be provisioned for installing with 1+1 Redundant NTP Servers or Sub-Master Clocks • The VCL-W-KLOX shall automatically fall back to the Standby NTP Server if the Primary NTP Server quality degrades or becomes un-available. • Extremely high clock accuracy - better than 1ms accuracy • High Stability Oscillator for standalone operation (in the event of the un-availability of the external time source). • The clock drift is less than ± 0.1 second in a 24 hour time-period in the absence of a remote synchronization source.

  15. Slave Clock (Digital) - VCL-2106 (VCL-W-KLOX) features cont.: • USB Local Management Interface • 10/100BaseT Interface for Remote Management • NMS (Network Management Software) for monitoring and managing multiple nodes • Maintains a log of all alarms and events • LED Status Indicator / LED Alarm to indicate loss of synchronization with Master Clock • Optional PoE (Power Over Ethernet) • Temperature Operating Range: -20C to +65C

  16. NMS Overview: Unified Management System

  17. NMS - Management and Remote Monitoring: Remote Management: • Single Unified NMS. Unified Management System for managing every type of VCL “Time and Frequency Synchronization” equipment from a single “Management Utility”. • Visual differentiation of the equipment type by ICON in the NMS • GUI (Graphical User Interface) - Runs on any PC operating on Windows XP, Windows 7 or Windows 8.1 and Windows 10 OS. • Windows based GUI (Graphical User Interface) for easy configuration, management and access of the equipment. • CLI Control Interface with predictive command completion (HyperTerminal and Telnet) • SNMP V2 Monitoring and Traps (MIB File provided)

  18. System Management Options: Local Management: • USB Remote Management: • 10/100BaseT Ethernet Access Options: • Telnet • CLI Control Interface (HyperTerminal or VT100) • SNMP V2 Traps (MIB File provided). Security and Protection: • Password Protection • Secured Access via SSH V2 • RADIUS

  19. Thank You for your attention For more details visit us at our Website at http://www.valiantcom.com U.K. Valiant Communications (UK) Ltd 1, Acton Hill Mews, 310-328 Uxbridge Road, London W3 9QN, U.K E-mail: gb@valiantcom.com Website: http://www.valiantcom.com U.S.A. Valiant Communications & Technologies Inc. 4000 Ponce de Leon, Suite 470Coral Gables, FL 33146, U. S. A E-mail:us@valiantcom.com Website: http://www.valiantcom.com INDIA Valiant Communications Limited 71/1, Shivaji Marg, New Delhi – 110015 E-mail: mail@valiantcom.com Website: http://www.valiantcom.com

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