High-Capacity Data Collection Platform for Smart Cities Using IEEE 802.11ad-Based Millimeter-Wave V2X Communication

Table 3

Symbols used in the proposed method.

Symbol	Description
	Delay from receiving the first beacon to establishing the IEEE 802.11ad connection with the RSU
	Scan delay
	Association delay
	WPA-PSK 4-way handshake delay
	Processing delay
	Active scanning time
	Delay until the first beacon received
	Scan interval
	Number of scan retries (probe exchange failures)
	Join delay
	Channel access time for association frame exchange
	Number of association retries (association exchange failures)
	Association backoff delay
	Delay in assigning an IP address to the OBU connected to the RSU
	DHCP 4-way handshake delay
	Ping check delay
	Delay from launching the uploader application software to the first byte transfer by HTTPS
	ARP delay
	TCP 3-way handshake delay
	SSL/TLS 4-way handshake delay
	First byte data transfer delay by HTTPS
	Delay of the entire initial link setup procedure