TETRA Course Benefits

Review of TETRA Architecture and Operation
TETRA Features and Services
Trunked Mode operation
Direct Mode Operation

Overview of the TETRA Air Interface
Spectrum allocations and channel assignments
Physical and Logical channels
TDMA structure
Medium Access Control sublayers
Logical Link Control layer
Air interface message sets
Idle mode and dedicated mode procedures
Power budgets and range estimation
Cellular capacity issues

The TETRA Physical Layer
Frequency allocation
Carrier Frequencies and Radio Channel Numbers
π/4DQPSK modulation
Frame, slot and burst structures
Synchronisation
Frequency reference
Transmission delays
Scrambling
Power control
Channel quality measurement
Physical layer performance
Emissions and interference
Area coverage techniques

The TETRA Data Link Layer
LLC and the MAC sublayers
Coding and interleaving
FEC and error detection
Channel coding for Data and Signalling
Coding parameters
Stealing
Random Access
Logical channel routing
System modes: Normal, Extended, Minimum, Discontinuous
Mobile Station modes: Idle, Signalling & Packet Data, Traffic, Economy

The TETRA Network Layer
Network layer concepts
The TETRA Network layer
TETRA protocol stacks
Mobile to Base Link
Mobility Management protocols
Circuit mode operation
Packet mode operation
The higher layers: X.25, TETRA data services, SCLNP
Inter-network protocols

TETRA Voice Coding
Voice coding schemes
ACELP coding
Speech versus transmission frames
Identifying voice calls in TETRA systems
Extracting voice payload from TETRA channels
Interfaces to other voice systems
Voice transcoding

TETRA Security
Principles of encryption and authentication
TETRA authentication
TETRA encryption
Encryption keys
OTA Re-keying
End-to-End encryption

Operational Factors
Idle mode and dedicated mode procedures
Power budgets
Range considerations
Air interface configurations and parameters