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Table 1 Simulation parameters
| Parameter | Highway | Urban |
|---|---|---|
| Road segment length | 1 km | 430 m |
| Num. of horizontal segments | – | 3 |
| Num. of vertical segments | – | 3 |
| Lane width | 5 m | 5 m |
| Num. of lanes per direction | 4 | 1 |
| Wireless comm. range | 150 m | 150 m |
| Vehicle speed | [60, 90, 110, 120] km/h | [40–60] km/h |
| Packet size | 500 bytes | 500 bytes |
| Data rate | 12 Mbps | 12 Mbps |
| TX power | 23 dBm | 23 dBm |
| SNR threshold | 15 dB | 15 dB |
| Broadcast rate | 10 MHz | 10 MHz |
| Slots per frame | 100 | 100 |
| Slot width | 1 ms | 1 ms |
| Contention window size | 0.2 ms (10 backoff units) | 0.2 ms (10 backoff units) |
| Number of vehicles | 50–400 | 50–650 |
| Number of RSUs | 0 | 0 |
| Simulation time | 2 min | 2 min |
