Abstract
Cooperative intelligent transportation system (C-ITS) allows to improve safety of vehicles through communications between vehicles and infrastructure. C-ITS may also improve the safety of vulnerable road users (VRUs), but work on this issue is still in an early stage. ITS-G5 (IEEE 802.11p), the main technology for vehicle-to-vehicle time-critical communications, allows to deliver safety information over a rather long range with low latency, but obstacles in the link path and a large amount of vehicles sending at the same time may reduce performance. In this study, the authors assess and optimise the performance of ITS-G5 for time-critical safety conflict scenarios between vehicles and VRUs. The authors have tested various non-line-of-sight (NLOS) scenarios in urban environments and line-of-sight (LOS) simulations to support C-ITS message prioritisation and scalability with different amount of vehicles. Example use cases with NLOS include pedestrians crossing streets from behind objects, and low-visibility scenarios, e.g. when VRU is behind a vehicle, behind a queue of vehicles, between vehicles, behind trees/bushes or behind a building. The LOS simulations utilise fuzzy weighted queueing mechanism for congestion control to overcome the packet losses and for data prioritisation. Based on these results, the applicability of ITS-G5 for VRU applications is assessed and performance improved.
| Original language | English |
|---|---|
| Pages (from-to) | 126-133 |
| Number of pages | 8 |
| Journal | IET Intelligent Transport Systems |
| Volume | 11 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 1 Apr 2017 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- Vulnerable Road User (VRU)
- Intelligent Transport Systems (ITS)
- ITS-G5
- IEEE 802.11p
- fuzzy flow scheduling
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ITS-G5 Performance improvement and Evaluation for Vulnerable Road User Safety Services. / Jutila, Mirjami; Scholliers, Johan; Valta, Mikko; Kujanpää, Kaisa.
In: IET Intelligent Transport Systems, Vol. 11, No. 3, 01.04.2017, p. 126-133.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - ITS-G5 Performance improvement and Evaluation for Vulnerable Road User Safety Services
AU - Jutila, Mirjami
AU - Scholliers, Johan
AU - Valta, Mikko
AU - Kujanpää, Kaisa
PY - 2017/4/1
Y1 - 2017/4/1
N2 - Cooperative intelligent transportation system (C-ITS) allows to improve safety of vehicles through communications between vehicles and infrastructure. C-ITS may also improve the safety of vulnerable road users (VRUs), but work on this issue is still in an early stage. ITS-G5 (IEEE 802.11p), the main technology for vehicle-to-vehicle time-critical communications, allows to deliver safety information over a rather long range with low latency, but obstacles in the link path and a large amount of vehicles sending at the same time may reduce performance. In this study, the authors assess and optimise the performance of ITS-G5 for time-critical safety conflict scenarios between vehicles and VRUs. The authors have tested various non-line-of-sight (NLOS) scenarios in urban environments and line-of-sight (LOS) simulations to support C-ITS message prioritisation and scalability with different amount of vehicles. Example use cases with NLOS include pedestrians crossing streets from behind objects, and low-visibility scenarios, e.g. when VRU is behind a vehicle, behind a queue of vehicles, between vehicles, behind trees/bushes or behind a building. The LOS simulations utilise fuzzy weighted queueing mechanism for congestion control to overcome the packet losses and for data prioritisation. Based on these results, the applicability of ITS-G5 for VRU applications is assessed and performance improved.
AB - Cooperative intelligent transportation system (C-ITS) allows to improve safety of vehicles through communications between vehicles and infrastructure. C-ITS may also improve the safety of vulnerable road users (VRUs), but work on this issue is still in an early stage. ITS-G5 (IEEE 802.11p), the main technology for vehicle-to-vehicle time-critical communications, allows to deliver safety information over a rather long range with low latency, but obstacles in the link path and a large amount of vehicles sending at the same time may reduce performance. In this study, the authors assess and optimise the performance of ITS-G5 for time-critical safety conflict scenarios between vehicles and VRUs. The authors have tested various non-line-of-sight (NLOS) scenarios in urban environments and line-of-sight (LOS) simulations to support C-ITS message prioritisation and scalability with different amount of vehicles. Example use cases with NLOS include pedestrians crossing streets from behind objects, and low-visibility scenarios, e.g. when VRU is behind a vehicle, behind a queue of vehicles, between vehicles, behind trees/bushes or behind a building. The LOS simulations utilise fuzzy weighted queueing mechanism for congestion control to overcome the packet losses and for data prioritisation. Based on these results, the applicability of ITS-G5 for VRU applications is assessed and performance improved.
KW - Vulnerable Road User (VRU)
KW - Intelligent Transport Systems (ITS)
KW - ITS-G5
KW - IEEE 802.11p
KW - fuzzy flow scheduling
UR - http://www.scopus.com/inward/record.url?scp=85019080575&partnerID=8YFLogxK
U2 - 10.1049/iet-its.2016.0025
DO - 10.1049/iet-its.2016.0025
M3 - Article
VL - 11
SP - 126
EP - 133
JO - IET Intelligent Transport Systems
JF - IET Intelligent Transport Systems
SN - 1751-956X
IS - 3
ER -