Research Article
CMD: A Multichannel Coordination Scheme for Emergency Message Dissemination in IEEE 1609.4
| Acronym | Description |
| | The packet arrival rate | | Average service rate of the queue in packets per second | | The probability that at least one packet is in the queue = | | Is the back-off blocking probability | | The packet arrival probability = | | Contention window size for back-off | | Current window size state as an effect of exponential back-off | | Idle state | | Traffic density | | The reference distance used in calculating the received signal strength at a particular distance | | The received signal strength at specified distance | | The critical distance that refers to the distance where the first Fresnel zone touches the ground and is also referred to as the Fresnel distance | | Path loss exponent | | Path loss exponent | | Transmitter height | | Receiver height | | Electromagnetic wavelength fixed at 5.9 GHz | | The number of vehicles in carrier sensing range | | The zero mean, normally distributed random variables with standard deviation | | The zero mean, normally distributed random variables with standard deviation | | The carrier sensing range defined as the average distance for a node to detect the other nodes transmissions | | The carrier sensing threshold which indicates the receive sensitivity of the radio and is a constant and radio dependent |
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