11-04-2013, 04:23 PM
Inter-vehicle communication (IVC) systems
[attachment=52973]
INTRODUCTION
Inter-vehicle communication (IVC) systems (i.e., systems not relying on roadside
infrastructure) have the potential to radically improve the safety, efficiency,
and comfort of everyday road travel. Their main advantage is that
they bypass the need for expensive infrastructure; their major drawback is the
comparatively complex networking protocols and the need for significant
penetration before their applications can become effective. In this article we
present several major classes of applications and the types of services they
require from an underlying network. We then proceed to analyze existing
networking protocols in a bottom-up fashion, from the physical to the transport
layers, as well as security aspects related to IVC systems. We conclude
the article by presenting several projects related to IVC as well as a review of
common performance evaluation techniques for IVC systems.
PUBLIC SAFETY APPLICATIONS
Public safety applications are geared primarily toward avoiding
accidents and loss of life of the occupants of vehicles
. Collision warning systems have the potential to
reduce the number of vehicle collisions in several scenarios.
On highways, frontal collisions with slow moving (or
stopped) vehicles are one of the most common types of accidents,
often with serious consequences. A vehicle with its
airbags deployed, or a stopped or rapidly decelerating vehicle
can transmit warning signals to all other approaching vehicles.
Intermediate relays may be used to increase the dissemination
range of the warning beyond the direct transmission range.
Traveler information support
Traveler information support applications provide updated
local information, maps, and in general messages of relevance
limited in space and/or time.
Local information such as local updated maps, the location
of gas stations, parking areas, and schedules of local museums
can be downloaded from selected infrastructure places or
from other “local” vehicles. Advertisements with, for example,
gas or hamburger prices may be sent to approaching vehicles.
Road warnings of many types (e.g., ice, oil, or water on the
road, low bridges, or bumps) may easily be deployed by
authorities simply by dropping a beacon in the relevant area.
conclusion
In conclusion, IVC systems can enable several classes of applications
that can make road travel safer (by avoiding many
types of collisions), more efficient (by decreasing travel time,
avoiding traffic congestion, and increasing road capacity), as
well as more pleasant (through locally updated information).
reliance on roadside infrastructure, commonly thought to be
too expensive to be ubiquitously deployed in the near future.
[attachment=52973]
INTRODUCTION
Inter-vehicle communication (IVC) systems (i.e., systems not relying on roadside
infrastructure) have the potential to radically improve the safety, efficiency,
and comfort of everyday road travel. Their main advantage is that
they bypass the need for expensive infrastructure; their major drawback is the
comparatively complex networking protocols and the need for significant
penetration before their applications can become effective. In this article we
present several major classes of applications and the types of services they
require from an underlying network. We then proceed to analyze existing
networking protocols in a bottom-up fashion, from the physical to the transport
layers, as well as security aspects related to IVC systems. We conclude
the article by presenting several projects related to IVC as well as a review of
common performance evaluation techniques for IVC systems.
PUBLIC SAFETY APPLICATIONS
Public safety applications are geared primarily toward avoiding
accidents and loss of life of the occupants of vehicles
. Collision warning systems have the potential to
reduce the number of vehicle collisions in several scenarios.
On highways, frontal collisions with slow moving (or
stopped) vehicles are one of the most common types of accidents,
often with serious consequences. A vehicle with its
airbags deployed, or a stopped or rapidly decelerating vehicle
can transmit warning signals to all other approaching vehicles.
Intermediate relays may be used to increase the dissemination
range of the warning beyond the direct transmission range.
Traveler information support
Traveler information support applications provide updated
local information, maps, and in general messages of relevance
limited in space and/or time.
Local information such as local updated maps, the location
of gas stations, parking areas, and schedules of local museums
can be downloaded from selected infrastructure places or
from other “local” vehicles. Advertisements with, for example,
gas or hamburger prices may be sent to approaching vehicles.
Road warnings of many types (e.g., ice, oil, or water on the
road, low bridges, or bumps) may easily be deployed by
authorities simply by dropping a beacon in the relevant area.
conclusion
In conclusion, IVC systems can enable several classes of applications
that can make road travel safer (by avoiding many
types of collisions), more efficient (by decreasing travel time,
avoiding traffic congestion, and increasing road capacity), as
well as more pleasant (through locally updated information).
reliance on roadside infrastructure, commonly thought to be
too expensive to be ubiquitously deployed in the near future.