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Table 1 Simulation parameters

From: A cooperative V2X MAC protocol for vehicular networks

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