1. TETRA project in Slovenia
Igor Bogataj Ministry of Interior Police

2. Republic of Slovenia Surface area: 20.253 sq km Population: 2 million
Neighbouring countries: Hungary, Austria, Italy and Croatia
Slovenia has become a member of NATO (29.03.) and European Union (01.05.) in year 2004
Not yet a member of Schengen agreement, foreseen for year 2007
TETRA project in Slovenia Ministry of Interior

3. Police organization Police is a body within the Ministry of Interior
Police performs its tasks on three levels: state (General Police Directorate), regional (11 Police Directorates) and local (police stations)
Different types of operational user groups
Uniformed police
Criminal investigation police
Security and protection bureau
Special unit
Operations and communications centre
Additional services for supporting operational user groups
Informatics and telecommunications service
Personnel department
Logistics services
TETRA project in Slovenia Ministry of Interior

4. Analogue radio systems
Closed private radio network - just for police users
Old (end of life period), outdated, costly to maintain
Conventional – not trunking
Frequency inefficient
No integrated national radio network. Regional or local systems. Infrastructure cannot be further expanded
Only limited number of radio terminals have voice encryption – analogue scramblers
Not suitable for new data applications, limited interfaces to other telecommunication networks
TETRA project in Slovenia Ministry of Interior

5. Mobile data network Conventional analogue technology
Radio coverage limited to southern half of Slovenia
6 base stations on very high locations
Large cells with low traffic capacities (one channel per cell)
Frequency inefficient system
Low data speed
1200 bit/s in the air, 600 bit/s for applications
Only short text information
Database access
Unable to fulfil new operational needs for data applications (e.g file & image transfer, fingerprint identification system)
TETRA project in Slovenia Ministry of Interior

6. APCO 25 network First installation in year 1995
System is conventional – not trunking
Restricted number of user groups and limited radio coverage
Offering high level of voice encryption (DVP-XL)
Simulcast voting solution (synchronization with GPS)
Only one main supplier
Incompatibility with neighbouring countries
TETRA project in Slovenia Ministry of Interior

7. Public safety requirements in Slovenia
Operational requirements for high system reliability and encryption of sensible information
Protection of national and security interests of Slovenia
Fast adaptation of network to user needs
Fulfil EU requirements for safety on Schengen borders
Decision for a digital pilot radio network as part of project “Border control” (Government & MoI )
Document “Strategy of establishing the digital radio network of Slovenian governmental institutions”
prepared by Ministry for informatics society and PSS users
confirmed by Government ( )
TETRA project in Slovenia Ministry of Interior

8. Steps towards digitalization
Analysis of
present communications
organisation structure & operational procedures
Predict possible influences on operational process during digitalization. Plan the migration scenarios.
Plan fleet-mapping, functionality of terminal equipment and training process
Predict future development of organization (operational users and C&C centres)
Trade off between essential needs and desires – mainly for data applications
Split project into several steps: design, development and implementation
TETRA project in Slovenia Ministry of Interior

9. Why TETRA? Digital open standard - Multi vendor
IOP certification for infrastructure and terminals
Secure communications – Authentication, AIE & E2EE
Voice clarity, especially in noisy environments
Various possibilities for data applications (SDS, multislot circuit and packet switched data)
Concurrent voice & data
Efficient use of radio spectrum
Future enhancement – TETRA Release 2
Improvement of user efficiency and safety
EU police cooperation – cross border communications
TETRA project in Slovenia Ministry of Interior

10. Other benefits of TETRA
Fulfilment of Schengen requirements
2-way voice & data communications
status messaging and SDS
network controlled communications channels
fast access to the system (< 500 ms)
short transmission delay (< 150 ms)
terminal disabling (stolen or lost), priority levels etc.
Advanced dispatcher functions
group patching & Dynamic Group Number Assignment
end-to-end encryption (E2EE)
data applications (e.g. file & image transfer)
subscriber and group management
Reliability – BS local site trunking mode
DMO with repeater and gateway functions
TETRA project in Slovenia Ministry of Interior

11. Main steps during digitalization
Migration from analogue to digital
performed on region by region basis
radio coverage on defined police directorate
At least the same number of radio terminals in operations as in analogue network
No service interruption during transition from analogue to digital
All users must be properly trained
Analogue networks are still active
TETRA project in Slovenia Ministry of Interior

12. Delivered TETRA equipment
Supplier of the infrastructure: OTE S.p.A.
Infrastructure configuration:
Central switching node with NMS
Authentication centre
E2EE management centre
base stations
6 dispatchers
Interfaces to: analogue and digital telephone networks, analogue radio networks, data networks
Main parts of the network in redundant configuration
Infrastructure capacity for users and 64 BS
Frequency band 380 – 400 MHz
Suppliers of radio terminals: OTE and Motorola
TETRA project in Slovenia Ministry of Interior

13. Police responsibilities
BS locations selection (radio planning by vendor), frequency planning
Providing leased lines (from Telekom - national operator)
Installation of our own low capacity microwave links
Site surveys and Hw installation of BS
Hw installation of equipment on central site
Hw and Sw installation of all dispatcher stations, mobile, portable and fixed radios
Set-up and programming of end-user terminals
Workshops and training of end users
TETRA project in Slovenia Ministry of Interior

14. OTE responsibilities
Traffic analysis with estimated volumes and radio coverage calculations
Network design
Supply of equipment and software
Supervision of installation
Software installation
Adjusting network parameters
Training of Police technical team
Coverage & functional testing (jointly with Police)
TETRA project in Slovenia Ministry of Interior

15. Switching and control node
Central site - Ljubljana
ISDN telephone interface
Local dispatcher 1
Local dispatcher 2
Base station 1
Base station 2
Microwave link 2*64 kbit/s
Analogue telephone interface
Leased line 4*64 kbit/s
Leased line 4*64 kbit/s
Microwave link 2*64 kbit/s
Switching and control node
Analogue radio network interface
Base station 3
Base station 4
MUX 1
MOIP server
Police line 8*64 kbit/s
Headquarter Krsko
Router
Authentication and air interface encryption server
Remote dispatcher 1
LAN & Intranet
MUX 2
Remote dispatcher 2
End-to-end encryption server
Network management system - server
Microwave link 4*64 kbit/s
Microwave link 2*64 kbit/s
HUB
Base station 5
Base station 6
Network management system – client 1
Network management system – client 2

16. Timetable for regions
Maribor
Murska Sobota
Slovenj Gradec
Kranj
Celje
Ljubljana
Operational use: April 2004 Size: 968 sq km Radio terminals: 250 Dispatchers: 2
Krsko
Nova Gorica
Novo mesto
Postojna
Koper
Operational use: Q Size: sq km Radio terminals: Dispatchers: 6
Operational use: Q Size: sq km Radio terminals: 300 Dispatchers: 2
TETRA project in Slovenia Ministry of Interior

17. Experience gained till now
Very good radio coverage of TETRA base station in comparison to analogue UHF base station
First generation terminals to big – equipment available today is better
Tests of basic radio terminal functionalities of other producers were successful
Training of end users – must be performed step-by-step and needed even more time
Group communications still present the main portion of traffic
Local site trunking (base station in fallback) must be planned carefully
TETRA project in Slovenia Ministry of Interior

18. Next steps
TETRA network available also to other PSS users (main users now are: Police, Customs and Prisons)
Sharing data applications among PSS organisations
Centralised recording and reproducing system
Integration of radio dispatcher function into informatics system C&C centre
TETRA project in Slovenia Ministry of Interior

19. Data application plan Network is ready for mobile data applications
Short Data Service (SDS)
Multislot circuit and IP packet switched data
Data applications are not yet in operational use
Performed tests for file transfer and intranet access
Planned data applications
Automatic vehicle and person location
Database access
AFIS – automatic fingerprint identification system
ANPR – automatic number plate recognition
Image transfer
TETRA project in Slovenia Ministry of Interior

20. Questions? igor.bogataj@policija.si Phone: + 386 1 472 5675
TETRA project in Slovenia Ministry of Interior