Top Requirement: PMT pulse timing accuracy (decision tree) What optical network? Ethernet Sonet Fibre channel and others Data store and forward (clock.

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Presentation transcript:

Top Requirement: PMT pulse timing accuracy (decision tree) What optical network? Ethernet Sonet Fibre channel and others Data store and forward (clock and time stamp at sea floor) Existing networks To be elaborated Time ridged design “free format” Point to point connection (wdm technology) PMT signals (timing) real time to shore (fixed signal propagation (no time stamp at sea floor) To be elaborated

secretary Postal sevice

Peer to peer IP 7Application Application programs e.g. electronic mail, browsers 6Presentation telnet, SMP, FTP 5Session telnet, SMP, FTP 4Transport TCP, UCP 3Network IP 2Data link Network interface cards, Connection, Optical switches a.o. 1Physical Twisted pair, wireless, Amplification, Optical fibre All optical physical layer SONET/SDHGbE ATM Free format IP All optical physical layer SONET/SDHGbE ATM 3Network 2Data link 1Physical Flash back to the OSI model of ISO 7Application 6Presentation 5Session 4Transport 3Network 2Data link 1Physical One fibre can carry many DWDM channels Each channel can carry a different protocol, and custom defined protocols can be used. Max. data transmission on one fibre ≤ 12.5 Tera bit/sec services Free format

IP SONET/SDH GbE ATM Free format IP SONET/SDH GbE ATM Free format Different applications All optical physical layer SONET Network Node(s) SONET Network Node(s) Network services SONET Network Node(s) Considering network architectures Optical channel point to point connection for clock/timing issues, with fixed propagation figures real time measurements on shore. For any solution be sure that the clock system is not interrupted or resynchronized by network system itself. Data transport “framed data” with “store-and-forward” data transport possible Choice between real-time signaling e.g. optical point to point (DWDM channel) minimal data to shore What to do for system control (slow control) Make a any connection in the network a network node (providing network) Time rigid point to point

IP SONET/SDH GbE ATM Free format IP SONET/SDH GbE ATM Free format Different applications All optical physical layer SONET Network Node(s) SONET Network Node(s) Network services SONET Network Node(s) SONET/SDH ( Synchronous Optical NETwork/Synchronous Digital Hierarchy) High transmission rates Simplified add off different Network master uses standardized network elements for control and monitoring from central location (TWM) Sonet layers: Physical:fiber or radio or satellite Section:SOH (Section Overhead) path between regenerators Line:link between mutiplexers LOH:Line overhead Path layer:where asynchronous digital signal enters and where these signals exit the SONET network Transport module:(synchronous payload envelope, SPE)

Some Sonet facts: STS-1/OC-151,84 Mbits/s STS-3/OC Mbits/s STS-12/OC Mbits/s STS-48/OC Mbits/s STS-192/OC Mbits/s Synchronous Transport Signal Mb/s Mb/s Mb/s