TETRA vs GSM | difference between TETRA and GSM
This page on TETRA vs GSM describes basic difference between TETRA and GSM technologies. The difference between various terms are also provided here.
TETRA System
This technology is defined by ETSI. The full form of TETRA is Trans-European Trunked Radio System.
It suppors 36Kbps maximum data transmission rate with π/4-DQPSK modulation type.
It operates in both star and mesh configurations.
Refer TETRA tutorial which explains
TETRA basic features, network interfaces and frame structure.
GSM System
The full form of GSM is Global System for Mobile Communication.
It supports both circuit switching and packet switching.
This system always work in star configuration via base station.
Hence when two mobiles need to communicate, the call setup and processing take
place through base station.
Refer complete GSM tutorial which explains GSM system
features, architecture, frame structure, GSM channels, GSM physical layer, protocol stack and more.
Basic comparison between TETRA and GSM
Following table mentions basic comparison between TETRA and GSM technologies.
| Specifications | TETRA | GSM |
|---|---|---|
| Access technique | digital TDMA | FDMA, TDMA |
| Frequency of operation | 400 MHz | 800MHz, 900MHz, 1800MHz, 1900MHz |
| Bandwidth | 6.25KHz | 25KHz, 12.5KHz(1/2 rate codec) |
| Call setup time | <1 sec | <10 sec |
| Data support | available | available |
| Group calls | supported | Not supported (available in conference mode) |
| WAN communication | Possible | Available |
| handover/roaming | supported | supported |
| authentication and encryption | supported | supported |
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