Research Article
[Retracted] Intelligent Advisory Speed Limit Dedication in Highway Using VANET
Table 5
Simulation parameters summary.
| | Traffic and network related parameters |
| | Scenario dimension | 8 km, 3 lanes, 1 direction | | Maximum number of vehicles | 400 vehicles for high traffic density | | Number of vehicles for each type | 75% passenger | | 20% van | | 5% heavy vehicle | | Maximum vehicle speed | 120 km/h | | Assumed vehicle length | 5 m, 6 m, 10 m | | Regular deceleration | 4.5 (m/s2) | | Emergency deceleration | 9 (m/s2) | | Speed distribution | SpeedFactor 1 | | SpeedDev 0.1 | | Minimum gap in high congested area | 2 m | | Intervehicle spacing | 7–43 m | | Driver imperfection value | 0.5 | | Impatience value | 0.8 | | Simulation time | 400 s | | Number of runs | 15 |
| | Radio propagation model | Two-ray ground | | Link/MAC layer protocol | IEEE 802.11p | | Data rate | 6 MB/s | | Channel bandwidth | 10 MHz | | Channel frequency | 5.9 GHz | | Vehicles antenna gain | 3 dBi | | RSU antenna gain | 10 dBi | | Vehicle antenna height | 1.5 m | | RSU antenna height | 9 m | | Noise floor (thermal noise) | −104 dBm | | Minimum contention window | 15 | | Transmission power | | | RSU | 16.8 dBm | | Vehicle | 10.8 dBm | | Receiver sensitivity | −91 dBm | | Symbol duration | 8 μs | | Clear channel assessment threshold | −65 dBm | | SINR for preamble capture | 5 dB | | SINR for frame body capture | 10 dB | | Slot time | 13 μs | | SIFS time | 32 μs | | Preamble length | 32 μs | | PLCP header length | 8 μs | | Packet sizes | 100, 200, 250 bytes | | Beacon generation rate | 5 Hz | | Modulation | QPSK | | Maximum communication range | 300 m |
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