1. Physical Interoperability
Task 3.1
Physical Interoperability

2. Digital transmission via analog channel – principle of operation
HDW converter
4-20 mA IN
Sensor
Watermeter/Pulvimeter
Analog
/RS232
RS 232/
VOICE
CB/TETRA
STW
converter
HDW converter
RS232/TCP/IP
RS 232/UDP
CB/TETRA
VOICE/RS 232
OUT
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
PC (SERVER)

3. Digital transmission via analog channel – realization concept
Estimated hardware cost:
200 EUR per node

4. Digital transmission via analog channel – realization concept
Estimated hardware cost: 250 EUR per node
Main 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

5. 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.

6. GPRS based multisensory data acquisition – principle of operation
Remote water meter reading
4-20 mA
TELEMETRIC MODULE
(AB MICRO)
Sensor
GSM/
GPRS
Watermeter
Pulvimeter
Sensor 2
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

7. GPRS based multisensory data acquisition – realization concept
Estimated hardware cost: 130 – 450 EUR per node plus 500 EUR router cost

8. GPRS based multisensory data acquisition – realization concept
Estimated hardware cost: 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

9. Network based on licensed bands (frequencies from 433 to 868 MHZ)
principle of operation
Issues related to the conception:
Costs related to licensed band frequency lease
Minimum single node range

10. Network based on licensed bands (frequencies from 433 to 868 MHZ)
realization concept
Estimated hardware cost: 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

11. 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:

12. What do we have to know before implementation start?
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)