Abstract
Problem statement: Route maintenance and re-discovery are expensive in signaling and computation for routing in Vehicular Ad hoc Networks (VANETs). Hence it was desirable to choose the optimal route during the route selection phase. Approach: In this study, the threshold-based routing protocol β-wt uses the notion of threshold from variable precision rough sets. This protocol was used to evaluate routing performance on freeway scenarios in VANETs. A Traffic Generator tool IMPORTANT was used to obtain vehicular movement traces, that are then given as input to the Network Simulator NS2. Results: Results of four performance metrics were got for different values of the thresholds. The performance of the new protocol was compared with that of the original Dynamic Source Routing (DSR). Conclusion: The new protocol performs better than DSR in Packet Delivery Ratio (PDR) and Normalized Routing Load (NRL). The study showed that variations in thresholds do not affect PDR and NRL, while for End to End Delay (EED) and Average Hop Count (AHC), certain values of these thresholds perform much better than other values in this particular VANET application.
Highlights
Vehicles on the roads can form a Vehicular Ad hoc Network (VANET) using wireless technology to communicate with each other without any predeployed infrastructure
This study focuses on sparse VANETs, where there are packets delivered to the application layer of the few vehicles and they move at high velocities, as found destination to those sent by the application layer of on a freeway or highway
When compared with the results of the original Dynamic Source Routing (DSR) protocol, it is seen that the new β-wt protocol is generally better for the performance metrics Packet Delivery Ratio (PDR) and Normalized Routing Load (NRL), but do not in general show improvement for the other two performance metrics End to End Delay (EED) and Average Hop Count (AHC). These results show that the new β-wt protocol has achieved better packet delivery ratio with less normalized routing load when compared to DSR
Summary
Vehicles on the roads can form a Vehicular Ad hoc Network (VANET) using wireless technology to communicate with each other without any predeployed infrastructure. The protocol VPRS-WT in (Rajam et al, 2008) is designed for routing in MANETs by optimal choice of next-hop, based on weighted elementary sets in temporal information systems for routing in MANETs. The study uses the random-waypoint model for node movements.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
