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Project Deliverable D50 Report on Best Practices Workshop - Ifremer

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This Reference Model has the objective to take in account a wide range of possible<br />

implementati<strong>on</strong>s. In real world, we will find more simplified observatories where some of the<br />

blocks can be bypassed.<br />

The following descripti<strong>on</strong>s apply to figure 7.<br />

Standards and protocols are proposed to communicate different main blocks or sec<strong>on</strong>dary<br />

blocs:<br />

Main Blocks: Sec<strong>on</strong>dary Blocks<br />

Instrument Sensor, ADC, Processing, Calibrati<strong>on</strong>, Storage<br />

C<strong>on</strong>centrator<br />

Sea Stati<strong>on</strong> C<strong>on</strong>troller, Buffer<br />

Node or Juncti<strong>on</strong> Box Switch, Modem<br />

Shore Stati<strong>on</strong> Modem, C<strong>on</strong>troller<br />

Crystal, CLK<br />

Operators<br />

Clients<br />

Archive<br />

Main communicati<strong>on</strong> protocols and initiatives to take into account in order to communicate<br />

different blocs are:<br />

RS232, CAN, RS485, RS422, Ethernet, USB, RF, Acoustic, Satellite and over this physical<br />

layers CANopen, TCP/IP, UDP, 1451.0, PUCK, Sensor Web Enable (SWE), Sensor<br />

Observati<strong>on</strong> Service(SOS), Sensor Alert Services(SAS), Sensor Planning Services (SPS),<br />

ZeroC<strong>on</strong>f, NMEA, PPS; IEEE1588 and NTP.<br />

Reference Model brief Descripti<strong>on</strong><br />

An instrument is composed by theses main blocs: primary sensors, ADC functi<strong>on</strong>,<br />

Calibrati<strong>on</strong>, Processing, storage, and/or Power Supply.<br />

a: c<strong>on</strong>necti<strong>on</strong> a represents communicati<strong>on</strong> between primary sensor to ADC. It will be mainly<br />

analog communicati<strong>on</strong> even if could be digital if the primary sensor is digital or quasi-digital.<br />

Different Instruments can be c<strong>on</strong>nected point to point or in a multi-drop network to a<br />

c<strong>on</strong>centrator.<br />

b: c<strong>on</strong>necti<strong>on</strong> b represents this point to point or multi-drop network to a c<strong>on</strong>centrator.<br />

Different C<strong>on</strong>centrators can be c<strong>on</strong>nected to a Main C<strong>on</strong>troller (Sea Stati<strong>on</strong>) where a buffer<br />

memory can be used to assure data storage while communicati<strong>on</strong> with shore stati<strong>on</strong> is off.<br />

c: c<strong>on</strong>necti<strong>on</strong> c represents the c<strong>on</strong>necti<strong>on</strong> between different c<strong>on</strong>centrator and the Sea Stati<strong>on</strong><br />

C<strong>on</strong>troller.<br />

Different Sea Stati<strong>on</strong> C<strong>on</strong>trollers will communicate with shore stati<strong>on</strong> through a Node or<br />

Juncti<strong>on</strong> Box, composed by a switch and a modem.<br />

d: c<strong>on</strong>necti<strong>on</strong> d represents the c<strong>on</strong>necti<strong>on</strong> between Sea Stati<strong>on</strong> C<strong>on</strong>trollers and a<br />

communicati<strong>on</strong> Switch.<br />

<str<strong>on</strong>g>Deliverable</str<strong>on</strong>g> #50 - update October 2010 30

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