Performance and channel load evaluation for contextual pedestrian-to-vehicle transmissions

Rostami, Ali Shokouhi; Cheng, Bin; Lu, Hongsheng; Kenney, John B.; Gruteser, Marco

doi:10.1145/2980100.2980103

Cited by 15 publications

(23 citation statements)

References 22 publications

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“…As pointed out by a few efforts [3,14,49], network congestion can become severe with a large number of VRUs when all VRU devices actively participate in the V2P communication. To solve the network congestion issue, a few schemes, such as, Receive-only mode [3], contextual transmission [49], and clustering of VRUs [14] have been suggested.…”

Section: Discussionmentioning

confidence: 99%

“…In Active Mechanism , VRU devices participate in V2P communication actively i.e., they transmit the safety messages periodically. This periodicity may be varied based on the context of the VRU [49]. In our scenario, we use fixed periodicity of 0.5 s.…”

Section: Case Study Of Crash Scenariosmentioning

confidence: 99%

“…This is due to the fact that the VRU device waits for 2 s before the safety message transmission. SAE J2945/9 document indicates that the collision awareness message must be issued 8 s before the crash [49]. Under our simulation scenario, none of the mechanisms can fulfill this condition for scenarios 2.a and 2.c.…”

Section: Case Study Of Crash Scenariosmentioning

confidence: 99%

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Vehicle-to-Pedestrian Communication for Vulnerable Road Users: Survey, Design Considerations, and Challenges

Sewalkar

Seitz

2019

Sensors

109

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In the last few years, increasing attention has been provided to research Vehicle-to-Pedestrian (V2P) communication systems. These V2P systems serve different purposes (safety or convenience) and cater to different Vulnerable Road User (VRU) groups. Also, these V2P systems employ different communication technologies, and use different mechanisms to interact with the users. An effective V2P system also needs to consider varying characteristics of different VRUs. These various elements may be considered as design parameters of the V2P system. In this paper, we discuss such elements and propose a design framework for the V2P system based on them. We also provide an extensive survey of existing V2P efforts for safety and convenience applications and their design considerations. We perform a case study that compares the different approaches of V2P safety system for different VRU groups under different pre-crash scenarios. Finally, we discuss a few technological challenges in integration of VRUs into V2X systems.

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Section: Discussionmentioning

confidence: 99%

Section: Case Study Of Crash Scenariosmentioning

confidence: 99%

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Vehicle-to-Pedestrian Communication for Vulnerable Road Users: Survey, Design Considerations, and Challenges

Sewalkar

Seitz

2019

Sensors

109

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“…Nevertheless, the need for line-of-sight (LoS) restricts the proper operation of the sensing devices in the passive approach. Moreover, because the LoS condition cannot be ensured in all situations, the passive approach is unsuitable for several safety use cases, as previously pointed out by many authors [ 2 , 3 , 4 , 5 , 6 , 7 ]. Consequently, cooperative communication-based approaches, called cooperative intelligent transportation systems (C-ITS), have emerged as a suitable alternative.…”

Section: Introductionmentioning

confidence: 99%

“…For example, in the case of DSRC, there are concerns about the suitability of the technology to support the increase in network traffic associated with VRU. These concerns are mainly because this technology already suffers from network congestion on the Control Channel—used for the exchange of safety packets—when the network density increases [ 4 , 5 , 19 ]. The problem may become critical in some countries, like the US, if the push to reduce the spectrum allocation for DSRC continues [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Impact of Safety Message Generation Rules on the Awareness of Vulnerable Road Users

Lara

Yáñez

Céspedes

et al. 2021

Sensors

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In the face of cooperative intelligent transportation systems (C-ITS) advancements, the inclusion of vulnerable road users (VRU), i.e., pedestrians, cyclists, and motorcyclists, has just recently become a part of the discussion. Including VRU in C-ITS presents new challenges, most notably the trade-off between the increase in VRU safety and the aggravation in channel congestion resulting from VRU-generated messages. However, previous studies mainly focus on network-related metrics without giving much consideration to VRU safety-related metrics. In this context, we evaluated such a trade-off with a study of motion-based message generation rules for VRU transmissions. The rules were analyzed using theoretical and simulation-based evaluations. In addition to studying the message generation rules using channel load metrics, such as channel busy ratio (CBR) and packet delivery ratio (PDR), we introduced a new metric: the VRU Awareness Probability (VAP). VAP uses the exchange of messages from active VRU to measure the probability of VRU detection by nearby vehicles. Results show that fixed message-filtering mechanisms reduce the overall channel load, but they could negatively impact VRU detection. We established the importance of quantifying the VRU awareness and its inclusion in C-ITS analysis because of its direct impact on VRU safety. We also discussed approaches that include VRU context and dynamism to improve the definition of message generation rules.

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Vulnerable road user safety: A systematic review and mesh‐networking based vehicle ad hoc system using hybrid of neuro‐fuzzy and genetic algorithms

Altaf

Kaul

2021

Int J Communication

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Summary Intelligent Transport System (ITS) involves a number of Information and Communication Technology (ICT) interventions for efficient road safety management. Over the last few decades, there has been a significant increase in the safety of Vulnerable Road Users (VRU's). This study aims to identify the most frequent, regularly occurring causes of road accidents and outline actions that can be used as a baseline for improving road traffic safety. The main contributions in this paper include the following: a graphical investigation for finding out the overall rate of road accidents (injuries and deaths) in India. Based on graphical analysis, major loopholes responsible for road accidents in India are summed up. This paper discusses various issues faced by already available pedestrian and vehicular safety techniques. After analysis of the available techniques and their related case studies in a systematic way, it is observed that they are not able to overcome the loopholes (Collision Occurrence, Traffic Congestion, Pedestrian Crossing alert, Red Light violation, and Non‐Propagation of Distress Signal) present in the current “Road Transport Management (RTM) System” of India. Finally, after deep analysis of already available techniques, a futuristic approach “Mesh‐Networking based Vehicle Ad‐Hoc System (MN‐VAS) using hybrid of Neuro‐Fuzzy and Genetic Algorithm based Load Balancing on Node” is proposed for the safety of VRU's. This hybrid approach has been discussed with domain experts for practical input, and we concluded that this might be a good option for better RTM System in India.

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Performance and channel load evaluation for contextual pedestrian-to-vehicle transmissions

Cited by 15 publications

References 22 publications

Vehicle-to-Pedestrian Communication for Vulnerable Road Users: Survey, Design Considerations, and Challenges

Vehicle-to-Pedestrian Communication for Vulnerable Road Users: Survey, Design Considerations, and Challenges

Impact of Safety Message Generation Rules on the Awareness of Vulnerable Road Users

Vulnerable road user safety: A systematic review and mesh‐networking based vehicle ad hoc system using hybrid of neuro‐fuzzy and genetic algorithms

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