City Scenario

Calderon-Garciduenas L, Torres-Jardon R (2012) Air pollution, socioeconomic status, and children s cognition in megacities the Mexico City scenario. Front Psychol 3 217. doi 10.3389/fpsyg.2012.00217... 

Total number of streets in the city scenario simulated in... 

Total number of vehieles used for MATLAB simulations in highway and city scenarios... 

This section presents MATLAB simuiation resuits to study the accuracy of the anai-ysis in Sect. 3.4, and to evaiuate the performance of VeMAC as compared with ADHOC MAC in accessing the CCH in highway and city scenarios. 

For both scenarios under consideration, all the transmitted packets are broadcast packets, the wireless channel is ideal, and the only source of packet errors is the transmission collision. Table 3.1 summarizes the simulation parameters and Figs. 3.10 and 3.11 show snap shots of the simulated highway and city scenarios respectively, where the black and white triangles represent vehicles moving in opposite directions. The same slot duration and total number of time slots per frame are used for all the MAC protocols under consideration (Sect. 3.5.3). 

The rate of merging collision in the city scenario is shown in Fig. 3.17 for all the protocols. It is noted that, the relative difference between the rate of merging collision provided by the V-inf protocol and that provided by the VO protocol is reduced as... 

Pig. 4.8 Simulation results for the city scenario goodput, probability of a transmission collision, and protocol overhead [1]. a Periodic message goodput, b Event-driven message goodput, c Probability of a transmission collision, d Overhead... 

Fig. 4.9 Simulation results for the city scenario total delay and fairness indicators of the VeMAC protocol [1]. a Average total delay for VeMAC. b Periodic fairness indicator for VeMAC. c Event-driven fairness indicator for VeMAC...

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