Performance Analysis of IEEE 802.11p Safety Message Broadcast With and Without Relaying at Road Intersection

Noor-A-Rahim, Md.; Ali, G. G. Md. Nawaz; Nguyen, Hieu Duy; Guan, Yong Liang

doi:10.1109/access.2018.2829897

Cited by 62 publications

(39 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The reaction/stopping distances are evaluated by considering the reaction time equal to latency (delay) in the human-, IEEE802.p-and VLC-triggered braking case. Tests in real conditions found the fastest reaction time of car drivers to be t p−r = 1.37 sec [27], whilst the latency requirements in outdoor road applications are given in [28], [29]. In particular, IEEE802.11p standard provides a maximum latency of 100 ms for RF-based road safety applications.…”

Section: E Application To Road Safetymentioning

confidence: 99%

IEEE 802.15.7-Compliant Ultra-Low Latency Relaying VLC System for Safety-Critical ITS

Nawaz

Seminara

Caputo

et al. 2019

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

The integration of Visible-Light Communications technology (VLC) in Intelligent Transportation Systems (ITS) is a very promising platform for a cost-effective implementation of revolutionary ITS and cooperative ITS protocols. In this paper, we propose an infrastructure-to-vehicle-to-vehicle (I2V2V) VLC system for ITS, implementing it through a regular LED traffic light serving as a transmitter and a digital Active Decodeand-Relay (ADR) stage for decoding and relaying the received information towards further incoming units. The proposed VLC system targets the challenging and important case of ultra-low latency ADR transmission of short packets, as this is needed for emerging applications of automatic braking, car platooning and other critical automatic and/or assisted driving applications. The experimental validation of the ADR VLC chain, as well as a thorough statistical analysis of errors distribution in the transmission, has been performed for short to medium distances, up to 50 meters. The performances of the designed system are evaluated by measuring the packet error rate (PER) and latency in the whole ADR transmission chain. Our analysis shows that our system attains ultra-low, sub-ms latencies at 99.9% confidence level for PER as high as 5 × 10 −3 , yet granting a latency below 10 ms even for distances of 50 m. The demonstrated system prototype is compatible with IEEE 802.15.7 standard.

show abstract

Section: E Application To Road Safetymentioning

confidence: 99%

IEEE 802.15.7-Compliant Ultra-Low Latency Relaying VLC System for Safety-Critical ITS

Nawaz

Seminara

Caputo

et al. 2019

IEEE Trans. Veh. Technol.

View full text Add to dashboard Cite

show abstract

“…The probability of collision for a system with 60 vehicles is illustrated in Figure 7. The characteristics of the cost functions obtained from Equations (11) and (13) are shown in Figure 8, where the performances are shown in the presence of collisions with different (K, W). For both proposed schemes, the cost function increased as the number of transmissions from the RSU increased.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Intersections are a challenging environment for V2V wireless communication, as the V2V communication links may be blocked by high-rise buildings and other obstructions. Measurements have shown that the strength of the received signal power reduces quickly with distance from the intersection [7][8][9][10][11][12][13], resulting in significant degradation of V2V transmission performance; the packet delivery ratio reduced notably at distances of 40-50 m from the intersection [10]. Moreover, the data packet collision problem tends to be more severe at intersections, as the vehicle density is usually higher at an intersection than in other places.…”

Section: Introductionmentioning

confidence: 99%

A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections

et al. 2018

Self Cite

View full text Add to dashboard Cite

This paper is focused on a vehicle-to-vehicle (V2V) communication system operating at a road intersection, where the communication links can be either line-of-sight (LOS) or non-line-of-sight (NLOS). We present a semi-empirical analysis of the packet delivery ratio of dedicated short-range communication (DSRC) safety messages for both LOS and NLOS scenarios using a commercial transceiver. In a NLOS scenario in which the reception of a safety message may be heavily blocked by concrete buildings, direct communication between the on-board units (OBUs) of vehicles through the IEEE 802.11p standard tends to be unreliable. On the basis of the semi-empirical result of safety message delivery at an intersection, we propose two relaying mechanisms (namely, simple relaying and network-coded relaying) via a road-side unit (RSU) to improve the delivery ratio of safety messages. Specifically, we designed RSU algorithms to optimize the number of relaying messages so as to maximize the message delivery ratio of the entire system in the presence of data packet collisions. Numerical results show that our proposed relaying schemes lead to a significant increase in safety message delivery rates.

show abstract

“…Wireless communications are perceived as an enabler for high-performance C-ITS applications. Therefore, vehicle-to-vehicle (V2V) and vehicle-to-infrastructure (V2I) communications are key technologies for enabling C-ITSs [5,6]. In particular, wireless access in vehicular environments (WAVE) was designed as a radio communication system for V2V and V2I communications [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Symbol-Level Selective Channel Estimation in Packet-Based OFDM Systems

Choi

Mun

Yook

2020

Sensors

View full text Add to dashboard Cite

Wireless access in vehicular environments to support wireless communication between vehicles has been developed to provide road safety and infotainment services. In vehicular environments where the channel changes rapidly, channel estimation is very important in improving the reliability of wireless communication. Therefore, numerous channel estimation schemes have been proposed; however, none of the schemes proposed so far can perform well over the entire signal-to-noise ratio (SNR) region. In this paper, we propose a novel channel estimation scheme that selectively uses the better scheme between two channel estimation schemes on a symbol-by-symbol basis. The results show that the proposed scheme performs symbol-by-symbol selection of the better channel estimation scheme within a packet, and thus shows excellent performance over the entire SNR region in vehicular environments in terms of the bit error rate and packet error rate.

show abstract

Performance Analysis of IEEE 802.11p Safety Message Broadcast With and Without Relaying at Road Intersection

Cited by 62 publications

References 23 publications

IEEE 802.15.7-Compliant Ultra-Low Latency Relaying VLC System for Safety-Critical ITS

IEEE 802.15.7-Compliant Ultra-Low Latency Relaying VLC System for Safety-Critical ITS

A Semi-Empirical Performance Study of Two-Hop DSRC Message Relaying at Road Intersections

Symbol-Level Selective Channel Estimation in Packet-Based OFDM Systems

Contact Info

Product

Resources

About