Connected Vehicle Networks
An Introduction
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Prof. David Bernstein
James Madison University
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| Computer Science Department |
| bernstdh@jmu.edu |
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Overview
- Variants:
- Vehicle-to-Vehicle (V2V)
- Vehicle-to-Infrastructure (V2I)
- Vehicle-to-Pedestrian (V2P)
- Vehicle-to-Everything (V2X)
- Performance Issues:
- Latency
- Reliability
- Data Rate
- Range
Security Issues
- Categories of Loss/Harm:
- Privacy/Confidentiality
- Integrity
- Availability
- Categories of Threats:
- Spoofing (i.e., impersonation)
- Tampering (i.e., improper modification)
- Repudiation (i.e., denial of past behavior)
- Disclosure
- Denial of Service
Communication Technologies
- Dedicated Short Range Communication (DSRC):
- IEEE 802.11p in the 5.9GHz band
- 6-27Mbits/sec over 1000m with a latency less than 5ms
- Part of the Wireless Access in Vehicular Environments
(WAVE) System
- Cellular V2X (C-V2X):
- 4G LTE
- Low-latency mode using PC5
- Higher-latency mode using Uu
Communication Technologies (cont.)
- Dedicated Short Range Communication (DSRC):
- In November of 2020 (just after this lecture was presenetd
for the first time) the FCC eliminated the part of the spectrum
that had been set aside
- Half of the specturum was allocated for Wi-Fi
- Cellular V2X (C-V2X):
- The other half of the DSRC spectrum was allocated for C-V2X
V2V - Potentially Useful Information
- About the Vehicle:
- Location and Direction/Route
- Speed and Acceleration
- Stability/Traction Control State
- Windshield Wiper State
- Defroster State
- Headlight State
- About the Driver:
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Applications (cont.)
V2V - Latency Requirements
- Low-Latency Required:
- Emergency Braking Assistance,
Blind Intersection/Curve Assistance (i.e., Vehicle Ahead Warning),
Forward Collision Assistance, Intersection Movement Assistance,
Lane Change Assistance, Do Not Pass Assistance
(i.e., Oncoming Vehicle Warning)
- High-Latency Acceptable:
- Traffic Warning, Roadside Service Finder
V2I - Potentially Useful Information
- From the Infrastructure:
- Traffic signal state (including preemption for
emergency vehicles)
- Signage (e.g., stop signs, no left turn signs, exit
information)
- Road and air temperature
- To the Infrastructure:
- Payments
- V2V information for broader distribution
V2I - Applications (cont.)
V2I - Applications (cont.)
V2I - Applications (cont.)
V2P - Potentially Useful Information
- Safety Related:
- Location of pedestrian (to the vehicle)
- Mobility Related:
- Real-time transit/rideshare information
V2P - Applications (cont.)
