Research Article
TETRA Backhauling via Satellite: Improving Call Setup Times and Saving Bandwidth
Table 3
TETRA call setup times with A-bis via satellite.
| | Call type | Ack./unack. | Call setup time [s] | Calling user permission to transmit [s] | Called user permission to receive [s] | Timer constraints |
| | Individual | Unack. | 1.244 | 1.244 | 1.844 | T302 s |
| | Group call (scenario 1) | Unack. | 1.370 | 1.370 | 1.390 | — | | Ack. | 1.370 | 2.050 | 2.070 | — |
| | Group call (scenario 2 and 3) | Unack. | 1.370 | 1.370 | 1.350 | — | | Ack. | 1.370 | 2.050 | 2.030 | — |
| | Group call (scenario 4) | Unack. | 1.490 | 1.490 | 1.470 | — | | Ack. | 1.490 | 2.170 | 2.150 | — |
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