 InterNAQS employs the Internet or private IP networks to transport data between Nanometrics Data Acquisition (NAQS) Servers. InterNAQS also integrates data from non-Nanometrics data acquisition servers (example: SEEDLink). With InterNAQS, users can: • Implement real-time data sharing between separate networks on a local, regional, national or international basis.
• Forward data to and receive data from national or international networks in real-time.
• Automate real-time data routing as part of a fail-safe seismic network design strategy.
• Share VSAT Hub facilities to lower network cost.
• Easily implement off-site real-time data archiving and system back-up.
InterNAQS is based on the field proven NAQS application level re-transmission request protocol. This ensures both very high data availability and efficient bandwidth utilisation, while at the same time creating a virtual real-time data network. Any node (NAQS Server) on the network can receive all or selected station data and state-of-health information from other nodes.
Data Sharing and Aggregation (Refer to Figure 1)
Figure 1 (Click image for larger image) is an example of a system that uses InterNAQS to share data between three distinct networks. Each network could be part of a group of separate networks owned by one organization or unrelated networks each owned by different organizations within a country or region of the world. Today, several Nanometrics customers share data between networks within a country or regionally across International borders. Network B uses VSAT for real-time telemetry. Network A employs leased PTT lines. Network C is a non-Nanometrics network. Data from each network are stored on their respective NAQS (or SEEDLink) servers. NAQS and InterNAQS support exchange of data between Nanometrics and non-Nanometrics networks using SEEDLink. Data exchange and all error handling is managed by InterNAQS across the Internet or over a private IP network. InterNAQS uses the same robust error re-transmission request mechanism and bandwidth efficient transmission methods employed in the Libra VSAT system. This ensures very high data availability at each site while at the same time minimizing Internet bandwidth and data volume. This is especially beneficial where ISP pricing policies may be restrictive on total monthly throughput (fair use or market pricing policies). If you need to share all or selected stations across the country or across borders InterNAQS will make the task technically simple and straightforward. Mission Critical Fail Safe Network using InterNAQS (Refer to Figure 2)
 Figure 2. Figure 2 (Click image for larger image) is an example of a system using InterNAQS to share data and provide fail-safe data redundancy between networks. This customer deployed a real-time mission critical network with focus on high data availability and redundancy. Redundancy is desired in networks where Civil Protection seismic surveillance is the primary role. Network overview: Hub A, Primary Receive for A stations, Back-up Receive for C stations, Back-up Receive for E stations Hub B, Primary Receive for B stations, Back-up Receive for D stations Hub C, primary Receive for C stations, Back-up Receive for A stations (Primary Links shown as solid lines, back-up links shown as dotted lines) Each remote VSAT station group (example: A stations, B stations…) is assigned a Primary and Back-up Hub (example: A stations, Primary Hub A, Back-up Hub C). The Primary Hub (in this case Hub A) is the main data destination. Data are stored at the Primary Hub on the Nanometrics Data Acquisition System (NAQS) server (NAQS Server A). The back-up Hub for A stations (Hub C) is simultaneously listening and recording data to NAQS Server C. NAQS Server C is also recording and storing C group station data in its role as the primary NAQS Server at Hub C. Hub A also acts as a back-up for Hub E. E group stations use Hub E as primary and Hub A as back-up. The Nanometrics Libra network delivers multiple levels of redundancy. Physical, geo-diverse Hub redundancy offers several benefits. Hardware failures, power outages or deep rain fade occurrences at the primary Hub would not create a critical situation since the assigned back-up Libra Hub automatically takes over control of the remote stations. At the same time, InterNAQS ensures uninterrupted data flow from the back-up Hub to the primary Hub, leaving real-time data availability unaffected at the primary NAQS. This arrangement also makes routine maintenance and upgrades trouble free. During a recent test of this fail safe capability one customer reported that no loss of real-time data was noticed or evidenced at the primary Hub site when the primary Hub was taken off-line. When the Hub was “failed”, data received at the back-up Hub NAQS Server was automatically routed to the primary Hub NAQS server. Off-Site Data back-up
InterNAQS can also be used for off-site real-time data back-up. With an available IP connection, a back-up NAQS server can be set up in a different building or physical location. Data from the Primary NAQS servers can be replicated in real-time at the off-site location using InterNAQS.
Please consult the factory to discuss your particular requirements.
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Last Updated on Thursday, 20 December 2007 05:07 |
