Improvement and Performance Evaluation of IEEE 802.11p Protocol in Dense Scenario of VANET

Table 2

Variable definitions.

Variable	Meaning
	Probability of occurrence of
	Probability of beacon state
	Steady-state probability of TDMA state
	Sum of steady-state probabilities of CB states
	Steady-state probability of each state in TDMA phase
	Sum of steady-state probabilities of all states
	Steady-state probability of each back-off state
	Steady-state probability of each CCA state
	Steady-state probability of each ACK accepting timeout state
	Steady-state probability of each ACK accepted state
	Number of states for packet transmission
	ACK status number
	ACK acceptance timeout status number
	Number of members in the cluster
	Number of cluster heads
	Collision probability
	Probability of being busy in CCA state
	Sum of steady-state probabilities of CCA state in CB
	macMaxCSMABackoffs
	macMaxFrameRetries