QoS-Aware Multilayer UAV Deployment to Provide VoWiFi Service over 5G Networks

Table 2

System terminology summary.

Symbol	Example	Description
		Set of D-UAVs’ locations
		Number of deployed D-UAVs
		Cartesian coordinates of the -th D-UAV
		Set of A-UAVs’ locations
		Number of deployed A-UAVs
		Cartesian coordinates of the -th A-UAV
		Set of ground users’ locations
		Number of ground users
		Cartesian coordinates of the -th user