Multinational Communications
Interoperability Program
PHOENIX ENDEAVOR-2014
Spectrum management in Sri Lanka
Maj Thisara Kekulandara
Sri Lanka Army
AYU BOWAN
“MAY YOU BE BLESSED WITH LONG LIFE”
Out Line
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Overview RF Spectrum
Scope
TRCSL
Allocation of Service
Spectrum Management and Monitoring Section
Organization Structure
Military Communication
Overview RF Spectrum
Radio frequency (RF) is a rate of oscillation in the
range of around 3 kHz to 300 GHz, which corresponds
to the frequency of radio waves, and the alternating
currents which carry radio signals.
Overview RF Spectrum Cont…
Regions of the world
For the allocation of frequencies, the world has been
divided into three regions
National Scope
Management of Radio Spectrum
(Handled by the Telecommunications Regulatory
Commission).
International Scope
International Telecommunication Union (ITU) is
responsible for international cooperation and global
harmonization of the usage of radio frequency
spectrum.
• A national table of frequency allocations provides
a general plan for spectrum use and the basic
structure to ensure efficient use of the spectrum and
the prevention of radio frequency interference
between services.
• Telecommunications Regulatory Commission Of
Sri Lanka (TRCSL) control the spectrum.
• National radio frequency spectrum allocations:
960 – 3 000 MHz
Allocation of services
1. Aeronautical Radio Navigation Service
2. Amateur Service
3. Broadcasting Service
4. Cellular Service
5. Data Telemetry Service
6. Fixed Service
7. Land Mobile Service
8. Low Power Devices
9. Maritime Service
10.Satellite Service
• Regulatory texts govern the national spectrum
management
processes
by
Sri
Lanka
Telecommunications Act and the ITU regulatory
publications.
• Sri Lanka comprises a monitoring centre ,
attended and unattended stations vehicle and
portable system. (Equipped with Monitoring
Receivers, Spectrum Analysers, DF Processors,
Antennas, Computers and Monitoring & Direction
Finding Software)
•The range up to 30 MHz is coved by separate HF
station
Mobile Monitoring Station
Up to 3000 MHz
Ground Monitoring Station
Up to 3000 MHz
• Broadband Active Antennas are used to monitor
the spectrum from 10 kHz to 3 GHz with
Monitoring Receivers.
• Computerized system to keep and maintain
records of national frequency assignments and
spectrum use (DBMS).
• Number of frequency assignments approx. 7500
• We do have a policy and planning function for
national spectrum management.
• We do perform technical analyses of frequency
assignment requests.
• We do you perform radio monitoring of terrestrial
radio services.
Major
Functions
of
Spectrum
Management and Monitoring Section
1. Planning of Radio Frequency Spectrum in Sri Lanka
according to ITU recommendations.
2. Examination of frequency assignment requirements
and carrying out frequency assignments.
3. Issuance of annual invoices and licences for the
usage of radio frequencies and radio equipment.
4. Evaluation, recommendation and authorization of
radio equipment.
Major Functions ….
5. Detection, Identification and observation of all
electromagnetic emissions in the radio frequency
spectrum.
6. Mitigation of radio frequency interference.
Important
Applications and procedure of establishing /
Requesting radio frequencies can be found in the
http://spectrum.trc.gov.lk/
ORGANIZATIONAL CHART OF TELECOMMUNICATIONS REGULATORY
COMMISSION OF SRI LANKA
DGT
Director of
Tech Division
DD (Spectrum
Management)
Director of
Economic Affairs
DD
(Networks)
AD s
(Spectrum Management)
Engineers
Director of Legal
Affairs
Secretary to the
Commission
Director of
Admi & HR
Military Communication
Sri Lanka Army
• Chief Signal
authorization.
officer
responsible
• Signal Brigade responsible
Assigning of frequencies
for
for
the
Allocation/
• Signal workshops responsible for Installation/
maintaining of respective equipment.
Military Communication cont…
• Sri Lanka Army uses the HF, VHF and UHF
frequencies for communication
•HF
3 MHz to 30 MHz
•VHF 30 MHz to 300 MHz
•L/B 30 MHz to 87.975 MHz
•H/B 132 MHz to 177 MHz
•UHF
300 MHz to 3 GHz
Radio Sets uses
LHP 265 DC (HF) SCR Radio
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Country- India (Baharath Electronics)
Data and voice transmission
UHF 450 -470
Modulation FM
10 Band and 100 Channel Spacing
Uses chip antenna Dipole antenna
*Already brought down to Nepal
Questions ?
THANK YOU