Task 3.1Physical Interoperability

SensorWatermeter/Pulvimeter

4-20 mAAnalog/RS232

RS 232/VOICE

Digital transmission via analog channel – principle of operation

CB/TETRA

IN

CB/TETRA

OUT

VOICE/RS 232RS232/TCP/IPRS 232/UDP

PC (SERVER)

HDW converter

HDW converter

STWconverter

Issues related to the concept:• CB channels used to telemetry and

telecommand• Packet Radio (KISS, AX.25) protocols

legality in Regione Puglia• Single node transmission range

Digital transmission via analog channel – realization concept

Sensor 1

Sensor 2

Watermeter

Pulvimeter

Optional ADC

Raspberry PI

4-20 mA

TNC Pi (HDW converter)

Radiostation (CB/TETRA)

Input

RS232/I2C Voice

Radiostation (CB/TETRA)

Output

TNC Pi (HDW converter)

Packet Radio

Voice Raspberry PI

RS232/I2C PC / Other

Devices

TCP/IPUSB

RS232

TNC-Pi

Radio Connection

Raspberry PI

Estimated hardware cost: 200 EUR per node

Digital transmission via analog channel – realization concept

Sensor 1

Sensor 2

Watermeter

Pulvimeter

Hardware ADC / Digital

integrator

4-20 mA

TNC - X (HDW converter)

Radiostation (CB/TETRA)

Input

RS232 Voice

Radiostation (CB/TETRA)

Output

TNC - X (HDW converter)

Packet Radio

Voice RS232

PC Other Devices

Estimated hardware cost: 250 EUR per nodeMain advantages of the solutions:• Price of implementation• Simplicity of operation• Lack of costs related to further use of the system

Main disadvantages of the solutions:• Integration and synchronization of the system• Lack of certainty of connection stability

Digital transmission via analog channel – example of realization on the basis of Polish ARPS network

Polish ARPS network which allows wireless data exchange across the country. Communication is based on AX.25 protocol. Infrastructure allows connection for every user equipped with proper radio communication instruments.

Sensor

4-20 mA

GPRS based multisensory data acquisition – principle of operation

Remote water meter reading

Watermeter

Pulvimeter

Sensor 2

TELEMETRIC MODULE

(AB MICRO)

GSM/GPRS

Issues related to the conceptions which are using GPRS:• Costs of operation related to static SIM card IP address• GPRS range map in Regione Puglia

Sensor 1

Sensor 2

Watermeter

Pulvimeter

Telemetric module

MobiCon Family

Analog

Digital

Industrial router TK700/TK800

family

Other devices supporting GPRS communication

(telephone, tablet)

GPRS (2G/3G/LTE)

PCTCP/IP

GPRS based multisensory data acquisition – realization concept

Estimated hardware cost: 130 – 450 EUR per node plus 500 EUR router cost

GPRS based multisensory data acquisition – realization concept

Sensor 1

Sensor 2

Watermeter

Pulvimeter

Input mobile router

e.g. Conel company products

RS232

Output mobile router

e.g. Conel company products

Other devices supporting GPRS communication

(telephone, tablet)

GPRS (2G/3G/LTE)

PC running VPN portal e.g.

SmartCluster

TCP/IP

ADC / Synchronization-

integration layout

Analog RS232

Estimated hardware cost: 500 - 1000 EUR per node depends from router version

Main advantages of the GPRS based solutions:• No transmission range limitations• Stability of the connection • Higher baudrate than in radio communication

Main disadvantages of the GPRS based solutions:• Transmission dependent from mobile operator• Higher price than CB/TETRA based solutions• Additional costs related with constant SIM card

IP address

Network based on licensed bands (frequencies from 433 to 868 MHZ)

principle of operation

Node 1

Node 2

Node 5

Node 6

Node 4

Node 3

Final node connected to

PC

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

RadiomodemNode 1

RS232

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

RadiomodemNode 2

RS232

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

RadiomodemNode 3

RS232 PC / Other interface device

Routed radio packet

Direct radio packet

Issues related to the conception:• Costs related to licensed

band frequency lease• Minimum single node range

Network based on licensed bands (frequencies from 433 to 868 MHZ)

realization concept

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

SATEL radiomodem

e.g. SATELLINE

RS232

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

SATEL radiomodem

e.g. SATELLINE

RS232

Sensor 1

Sensor 2

Watermeter

Pulvimeter

ADC / Synchronization-

integration layout

Analog

SATEL radiomodem

e.g. SATELLINE

RS232 PC / Other interface device

Routed radio packet

Direct radio packet

Estimated hardware cost: 500 -1750 EUR per node

Main advantages of the solution:• The most stable communication link

from presented concepts• Network dedicated for the particular

solution• Costs related to network maintenance

lower than GPRS solutions

Main disadvantages of the solution:• Node range highly dependent from

topography and obstacles situated on radio signal way

• Hard and time consuming implementation and testing process

• Low baudrate

Network based on licensed bands (frequencies from 433 to 868 MHZ)

example of usage on the basis of Polish SMOG system

SMOG is the forecasting of air pollution propagation system. Structure of the system is based on SATEL radiomodems which allows communication in frequency of 433 MHz licensed band. System is running in Malopolska province.

More information and current measurements values at:http://www.smog.imgw.pl/home

Summary

• Presented solutions are based on SECRICOM project ideas and conclusions

• All conceptions requires own software development and integration

• Tests will be the most time-consuming part of task realization

What do we have to know before implementation start?

• Precise requirements concerned to physical layer of the system (measured magnitudes, number of sensors, data storage and visualization)

• Which of presented solutions is the most suitable to requirements

• Requirements related to single point transmission range• Legality limitations related to wireless transmission

(licensed bands, CB radio/TETRA telemetry channels) in Regione Puglia

• Is in the Regione Pugalia wireless radio network working, if it is, what requirements has to be met to connect to the network (certification, legality)