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Intelligent Transport Systems and Traffic Management
Published in Krishna Kumar, Gaurav Saini, Duc Manh Nguyen, Narendra Kumar, Rachna Shah, Smart Cities, 2022
R. Shyam Shankaran, Logesh Rajendran
Dedicated Short-Range Communications which is denoted as DSRC is a service that enables both secure activities in V2I & V2V communication contexts [13]. It is intended to supplement mobile carrier communications by delivering high data rates in situations by reducing latency and isolating to relatively smaller communication zones or fragments. DSRC is intended to operate in the band around 5,850 to 5,925 GHz radio frequencies, for vehicular wireless communications. With the defined data rates of 6–27 Mb/s, the range of communication with DSRC reaches 1,500 meters, with cars going up to 140 km/h [13]. The DSRC is split into two communication types, V2V, and V2I, as previously stated. In order for cooperation applications to operate correctly, the V2V communication shall also be used when cars have to exchange the information among themselves, whereas the V2I connectivity is employed when roadside units form a part of cooperative application. Some applications in cooperative systems have to regularly (for example every 100 ms) send messages, while other applications send messages while an event is happening.
VANET Communication and Mobility Sustainability
Published in Hussein T. Mouftah, Melike Erol-Kantarci, Sameh Sorour, Connected and Autonomous Vehicles in Smart Cities, 2020
Vehicular networks allow communication-enabled vehicles, roadside units, and other mobile devices to communicate in an ad hoc manner. Therefore, using VANET, moving vehicles can communicate with other vehicles (vehicle-to-vehicle [V2V]), roadside units (RSUs) (vehicle-to-infrastructure [V2I]), or even hand-held mobile devices (vehicle-to-device [V2D]) using a Dedicated Short Range Communication (DSRC) system. DSRC is an enhanced version of the WiFi technology suitable for VANET environments. The DSRC is designed to support communication in vehicular environments, which is characterized by its high mobility that results in rapid topology changes. DSRC has been standardized by IEEE 802.11p [58] in the 1609 family of standards known as Wireless Access in Vehicular Environments (WAVE) [28].
Opportunistic Vehicular Communication: Challenges and Solutions
Published in Nazmul Siddique, Syed Faraz Hasan, Salahuddin Muhammad Salim Zabir, Opportunistic Networking, 2017
IEEE 802.11p is an amendment to IEEE 802.11, adding wireless access in vehicular environments (WAVE) to this standard. The dedicated short-range communications (DSRC) is a general purpose communications link between a vehicle and RSUs (or between vehicles) using the 802.11p protocol. A similar mechanism is used in MAC layer operation of IEEE 802.11p as it was used for the IEEE 802.11 legacy system. By using the IEEE 802.11p service classes, as defined in the IEEE 802.11e standards, service quality differentiation is provided. At the PHY layer, the use of an orthogonal frequency division multiplexing (OFDM) system is expected to allow V2V as well as V2I communications for distances of up to 1000 m and relative speeds of 200 km/hr. The protocol may operate on either the 10 or 20 MHz channels, allowing data rates from 3 to 56 Mbps.
A flexible and adaptive medium access control protocol for improving quality of service in vehicular ad-hoc networks
Published in International Journal of Computers and Applications, 2022
Yani-Athmane Bennai, Samira Yessad, Louiza Bouallouche-Medjkoune
In the United States, 75 MHz have been dedicated exclusively to communications within VANETs (DSRC: Dedicated Short Range Communications) [3]. DSRC is a short-range wireless communications protocol in the 5.9 GHz band. It is based on the IEEE 802.11p standard and is used for vehicular communication. Figure 2 shows the bandwidth division, with a total of seven channels allocated, including a Control CHannel (CCH) that nodes use to exchange critical safety messages or periodic safety messages, and six Service CHannels (SCHs) that are used to share non-critical service data (entertainment or information) [4]. 802.11p uses the EDCA (Enhanced Distributed Channel Access) [5–7] MAC method, which is an improvement of the distributed coordination function (DCF) [8] used in 802.11.
Special issue on dense surveillance systems for urban traffic
Published in Journal of Intelligent Transportation Systems, 2020
Gwanggil Jeon, Marco Anisetti, Yong Fang
The contribution by Rios-Torres et al., “The extent of reliability for vehicle-to-vehicle communication in safety critical applications: an experimental study,” studies Vehicle-to-Vehicle (V2V) and vehicle collisions issues (Rios-Torres et al., 2020). V2V communication using Dedicated Short Range Communications (DSRC) technology has the potential to drastically reduce vehicle collisions. DSRC allows vehicles in a highly mobile and complex network to send and receive safety messages with higher reliability and lower latency compared to other wireless technologies used for automotive communications. However, there are many factors that could cause communication failures in safety-critical automotive applications. While the reliability of V2V communication has been a subject of study by several researchers, there are still open questions regarding the most effective placement (inside or outside the vehicle) of DSRC devices since interior elements and differences in altitude can affect V2V communication.
A review of the critical elements and development of real-world connected vehicle testbeds around the world
Published in Transportation Letters, 2022
Azadeh Emami, Majid Sarvi, Saeed Asadi Bagloee
The Infocomm Media Development Authority (IMDA) in Singapore dedicated the 5.9 GHz frequency band with 5875–5925 MHz spectrum for ITS applications in 2017. The dedicated spectrum is allocated to seven 10 MHz channels with different applications. The description of each channel type is also illustrated in Table 4. The DSRC is planned to be used in various applications such as electronic parking management, traffic signal control system, traffic information (warning (road collision, obstruction), stop light assistant, curve speed assistant), safety applications such as intersection collision warning avoidance, cooperative vehicle system and emergency planning (Committee, T. S. A 2018).