Abstract
The deployment of vehicular networks is considered crucial for traffic safety of future vehicles. Thus, researchers are making extensive efforts to improve the performance of the IEEE802.11p standard. Many researchers have proposed various MAC protocols to mitigate the chronicle problems of the IEEE802.11p – for example, the unreliable transmission of safety-related messages. However, most of the previous evaluations of the reliability problem have been done either via mathematical analysis or simulations. In this paper, we conducted actual experiments and analyzed the performance of two MAC protocols: IEEE802.11p and HCMAC, a hybrid MAC protocol recently reported. Using commercial V2X devices, we measured the performance in terms of received signal strength indicator (RSSI), packet delivery ratio (PDR), and packet inter-reception time (PIR). We tested the connectivity performance under various mobility scenarios. In addition, this paper investigates the impact of collisions on the overall performance. For a range of collision levels, an extensive set of experiments demonstrate that HCMAC outperforms the MAC of IEEE802.11p in terms of PDR and PIR up to 88% and 47%, respectively.
Highlights
Vehicular communication, often called vehicle-to-everything (V2X) communication, is among the main pillars for the imminent era of intelligent transportation systems
This paper provided an experimental analysis for two MAC protocols: IEEE802.11p and HCMAC – the latter is an existing hybrid MAC protocol
Using commercial DSRC compliant devices, we implemented the HCMAC protocol on top of the IEEE802.11p physical layer
Summary
Often called vehicle-to-everything (V2X) communication, is among the main pillars for the imminent era of intelligent transportation systems (e.g., autonomous vehicles). On top of the physical layer of IEEE802.11p, many researchers have proposed other MAC protocols that offer a reliable broadcast service and solve the problem of hidden nodes. Some of these MAC protocols employ time division multiple access (TDMA) [5]–[8], and others introduce a hybrid mechanism by combining CSMA and TDMA [8]. In addition to the IEEE802.11p evaluation, this paper presents and evaluates the performance of HCMAC, a hybrid MAC protocol that combines TDMA and CSMA for V2X channel allocation. For the extended work presented in this paper, we implemented HCMAC on the commercial V2X devices and measured its performance in comparison with IEEE 802.11p.
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.
