Abstract
Road safety is an active area of research for the automotive industry, and certainly one of ongoing interest to governments around the world. The intelligent transportation system (ITS) is one of several viable solutions with which to improve road safety, where the communication medium (e.g., among vehicles and between vehicles and the other components in an ITS environment, such as roadside infrastructure) is typically wireless. A typical communication standard adopted by car manufacturers is IEEE 802.11p for communications. Thus, this paper presents an overview of IEEE 802.11p, with a particular focus on its adoption in an ITS setting. Specifically, we analyze both MAC and PHY layers in a dedicated short-range communication (DSRC) environment.
Highlights
Vehicle manufacturers and government agencies have been exploring and researching ways to improve road safety, more effectively manage traffic flows, etc. [1,2,3]
There is a channel reserved for system control and safety-related messages, and it takes the name of control channel (CCH); and up to six channels are used for the exchange of non-safety data, signaling channels (SCHs)
It is useful to appraise the differentiation between basic service set (BSS), service set identifier (SSID), and basic service set identifier (BSSID) to estimate the adjustments to the MAC layer introduced in IEEE 802.11p
Summary
Vehicle manufacturers and government agencies have been exploring and researching ways to improve road safety, more effectively manage traffic flows, etc. [1,2,3]. An Internet-connected device (e.g., a mobile device/application) could notify drivers of the proximity of a bicyclist in the street or a pedestrian on a crosswalk [11,12,13,14,15], which could potentially reduce the number of pedestrian-related accidents Such intelligent or smart safety systems have been referred to in the literature as vehicle-to-vehicle (V2V; or car-to-car (C2C)), vehicle-to-infrastructure (V2I), vehicle-to-everything (V2X; or car-to-everything (C2X)), vehicular ad hoc networks (VANETs), and so on [16,17,18]. Services are provided by protocols designed by different working groups, such as IEEE 1609.2, IEEE1609.3, and IEEE 1609.4 These protocols relate to vehicle communications, which have been referred to as wireless access in vehicular environments (WAVE).
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