Optimal data rate selection for vehicle safety communications

Jiang, Daniel R.; Chen, Qi; Delgrossi, Luca

doi:10.1145/1410043.1410050

Cited by 166 publications

(104 citation statements)

References 4 publications

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“…We use the parameters suggested in [18] and [5], i.e., transmit power 20 dBm, noise floor −99 dBm and decoding threshold 8 dB in our simulation to determine the matrix P. We use this channel model both in the analytical expressions from Section IV and, to verify its correctness, in a Monte-Carlo simulation using MATLAB.…”

Section: Numerical Resultsmentioning

confidence: 99%

An Efficient Message Dissemination Technique in Platooning Applications

2015

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Abstract-Autonomous driving in road trains, a.k.a. platooning, may reduce fuel consumption considerably if the intervehicle distances are kept short. However, to do this, the intraplatoon communication must not only be reliable but also able to meet strict deadlines. While time-triggered messages are the foundation of most distributed control applications, platooning is likely to also require dissemination of event-driven messages. While much research work has focused on minimizing the age of periodic messages, state-of-the-art for disseminating eventdriven messages is to let all nodes repeat all messages and focus on mitigating broadcast storms. We derive an efficient message dissemination scheme based on relay selection which minimizes the probability of error at the intended receiver(s) for both unicast and broadcast, without degrading the performance of co-existing time-triggered messages. We present a full analysis of the resulting error probability and delay, when relayers, selected by our algorithm, are used to disseminate messages within a platoon. Numerical results indicate that the proposed relaying policy significantly enhances the reliability for a given delay.

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Section: Numerical Resultsmentioning

confidence: 99%

An Efficient Message Dissemination Technique in Platooning Applications

2015

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“…For V2V communication, QPSK modulation with data rate of 6 Mbps has been employed considering communication range and safety message sizes [14]. In the PCRL relaying transmission, however, higher level modulation such as 16QAM provides smaller airtime reduction rate and results in saving air traffic for relay.…”

Section: Packet Combining Relay Scheme With Adaptive Modulation and Cmentioning

confidence: 99%

Efficient CSMA/CA Packet Relay-Assisted Scheme with Payload Combining for ITS V2V Communication

Trien

Adachi

Yamao

2018

Journal of Information Processing

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CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) based relay-assisted V2V scheme is effective in compensating shadowing loss and hence improves performance of ITS V2V communications, especially for non-line-of-sight (NLOS) areas such as intersections. However, when the number of vehicle stations becomes large, packet congestion happens frequently at the relay station (RS). It causes interruption of packet relaying transmission and limits the improvement by the scheme. This paper proposes a packet payload combining relay (PCRL) scheme to alleviate the congestion issue at RS by compressing packet overheads of broadcast packets. With adaptive modulation and coding technique at RS, PCRL can further mitigate the packet interruption by reducing the air time of relayed packets. Time division grouping method is also applied to PCRL to mitigate the hidden terminal problem at intersections. Analyzed and simulated results show that the proposed schemes can effectively mitigate packet congestion issue and improve the reliability of the V2V communication.

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“…In terms of the physical layer, the data rate used for packet broadcasting is 6 Mbit/s, as this is the maximum rate for broadcasting in 802.11p (Jiang et al, 2008). The MAC layer was also extended to include four different channel access priorities.…”

Section: Simulation Environment and Previous Conceptsmentioning

confidence: 99%

RTAD: A real-time adaptive dissemination system for VANETs

Sanguesa

Fogue

Garrido

et al. 2015

Computer Communications

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Efficient message dissemination is of utmost importance to propel the development of useful services and applications in Vehicular ad hoc Networks (VANETs).In this paper, we propose a novel adaptive system that allows each vehicle to automatically adopt the optimal dissemination scheme in order to fit the warning message delivery policy to each specific situation. Our mechanism uses as input parameters the vehicular density and the topological characteristics of the environment where the vehicles are located, in order to decide which dissemination scheme to use. We compare our proposal with respect to two static dissemination schemes (eMDR and NJL), and three adaptive dissemination systems (UV-CAST, FDPD, and DV-CAST). Simulation results demonstrate that our approach significantly improves upon these solutions, being able to support more efficient warning message dissemination in all situations ranging from low densities with complex maps, to high densities in simple scenarios. In particular, RTAD improves existing approaches in terms of percentage of vehicles informed, while significantly reducing the number of messages sent, thus mitigating broadcast storms.

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Optimal data rate selection for vehicle safety communications

Cited by 166 publications

References 4 publications

An Efficient Message Dissemination Technique in Platooning Applications

An Efficient Message Dissemination Technique in Platooning Applications

Efficient CSMA/CA Packet Relay-Assisted Scheme with Payload Combining for ITS V2V Communication

RTAD: A real-time adaptive dissemination system for VANETs

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