Toward understanding characteristics of dedicated short range communications (DSRC) from a perspective of vehicular network engineers

Social Clustering of Vehicles Based on Semi-Markov Processes

“…In our simulations, we use a minimum sensitivity (P th ) of −69dBm to −85db, which gives a transmission range of 130 to 300 meters. According to [27], an acceptable communication range for VSC applications that use the same broadcast messages to our clustering methods is about 300 m. The range that can be achieved by low transmission power, as we use in our simulations, is enough for correct dissemination of a message in a neighborhood, while improving spatial reuse in heavy traffic. In rural environments, in scenarios with a low data rate (3MBPs), the authors in [27] have shown that a Packet Delivery Ratio (PDR) of 60% can be achieved for medium distances such as these.…”

Worm Epidemics in Vehicular Networks

“…Instead, we developed a dedicated simulator 2 that abstracts the detailed processing of messages through the network protocol stack, and adopts a simple R-radius disc modeling of the radio-frequency signal propagation. Unless stated otherwise, we will consider a default V2V communication range R = 100 m. This represents an average value among those identified for reliable packet delivery by different experimental studies on DSRC-based transfers [41], [42].…”

An Efficient Environmental Channel Modelling in 802.11P Mac Protocol for V2i

“…It requires continuous session as it breaks during ESS transition, require many AP's to cover entire city Difficult to achieve seamless roaming, rapid changes in topology, possible frequent disconnections, and environment-introduced multi-path fading: vehicles and stationary objects in big numbers create manifold signal paths, thus causing superposition of numerous copies of the transmitted signal. This leads to inter-symbol interference (ISI) between the successive orthogonal frequency-division multiplexing (OFDM) symbols on a sub-carrier [21], mobilityintroduced Doppler spread: when a moving vehicle receives a wireless signal, its perceived frequency will be Doppler shifted. The shift, which depends on the velocity of a vehicle, can destroy the orthogonality between the adjacent sub-carriers [21].…”

“…This leads to inter-symbol interference (ISI) between the successive orthogonal frequency-division multiplexing (OFDM) symbols on a sub-carrier [21], mobilityintroduced Doppler spread: when a moving vehicle receives a wireless signal, its perceived frequency will be Doppler shifted. The shift, which depends on the velocity of a vehicle, can destroy the orthogonality between the adjacent sub-carriers [21]. Does not guarantee good packet reception: there is no approved ideal case that packets have been either perfectly received or not received at all [21], there are weaknesses in particular environments: Environment factors impact significantly the characteristics of DSRC.…”

“…The shift, which depends on the velocity of a vehicle, can destroy the orthogonality between the adjacent sub-carriers [21]. Does not guarantee good packet reception: there is no approved ideal case that packets have been either perfectly received or not received at all [21], there are weaknesses in particular environments: Environment factors impact significantly the characteristics of DSRC.…”