Abstract
Developing a secure and smart intelligent transport system for both safety and non-safety application services requires a certain guarantee of network performance, especially in terms of throughput and packet collision performance. The vehicular ad hoc network propagation is strongly affected due to varying nature of the environment. The existing radio propagation path loss models are designed by using mean additional attenuation sophisticated fading models. However, these models do not consider the obstacle caused due to the obstacle of the vehicle in line of sight of the transmitting and receiving vehicle. Thus, the attenuation signal at the receiving vehicles/devices is affected. To address this issue, we present an obstacle-based radio propagation model that considers the effect caused due to the presence of obstructing vehicle in line of sight. This model is evaluated under different environmental conditions (i.e. city, highway, and rural) by varying the speed of vehicles and vehicles’ density. The performance of the model is evaluated in terms of throughput, collision, transmission efficiency, and packet delivery ratio. The overall result shows that the proposed obstacle-based throughput model is efficient considering varied speed and density. For instance, in the city environment, the model achieves an average improvement of 9.98% and 25.02% for throughput performance over other environments by varying the speed and density of devices respectively and an improvement of 15.04% for packet delivery ratio performance over other environments considering varied speed of devices.
Highlights
In vehicular ad hoc network (Vanet), different environments have different characteristics, that is, the city, highway, and rural (CHR) areas
The communications between V2V and V2I are displaced out via the dedicated short-range communication (DSRC) standard, so each RSU and onboard unit (OBU) uses a DSRC based on IEEE 802.11p to enter the wireless channel
The contribution of our article consists of (a) considering the vehicle between a transmitter and a receiver as an obstacle, (b) proposing a new radio propagation path loss model that computes the signal attenuation required for transmission between transmitter and receiver with the presence of multiple obstacles in line of sight (LOS), and (c) validating the network under different environmental conditions (i.e. CHR areas)
Summary
In vehicular ad hoc network (Vanet), different environments have different characteristics, that is, the city, highway, and rural (CHR) areas. Channel modeling plays a significant role in improving the performance of Vanet V2V communication network.[4,5] The future SSITS safety and non-safety application systems need to consider the environmental channel characteristics such as suburban, highway, and rural. The presence of an obstacle between a transmitter and a receiver affects the signal attenuation, especially at the receiver side Their models do not consider the evaluation under different environmental conditions such as CHR areas. The contribution of our article consists of (a) considering the vehicle between a transmitter and a receiver as an obstacle, (b) proposing a new radio propagation path loss model that computes the signal attenuation required for transmission between transmitter and receiver with the presence of multiple obstacles in LOS, and (c) validating the network under different environmental conditions (i.e. CHR areas). The proposed obstacle which is based on radio propagation CHR path loss model is presented in section ‘‘Proposed CHR model.’’ Simulation and experimental studies are presented in section ‘‘Simulation result and analysis.’’ The last section concludes the article and outlines future work
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