Research Article

A Semi-Markov Process Model for Performance Evaluation of DSRC Vehicular Safety Communication

Table 4

Parameter settings of DSRC communication.

General parametersValue

Data rate (Rd)24 Mbps
Basic rate (Rb)6 Mbps
Slot time (σ)9 μsec
SIFS time16 μsec
DIFS = SIFS + 2 × slot time34 μsec
Propagation delay (δ)1 μsec
Data payload length (E(P))200 octets
MAC sublayer overhead28 octets
PHY layer overload20 μsec
Retry limit L7
aCWmin63
aCWmax1023