Concise and Informative Article Title Throughput Maximization through Joint User Association and Power Allocation for a UAV-Integrated H-CRAN

Table 2

Summary of abbreviations and notations.

Notation	Description
H-CRAN	Heterogeneous cloud radio access network
HPN	High power node
RRH	Radio frequency remote head
UAV	Unmanned aerial vehicle
	User set
	RRH set
	UAV set
LoS	Line of sight
NLoS	None line of sight
	Number of subcarriers
	Uplink power of user to macro cell
	Downlink power of user to macro cell
	Uplink power of user to the RRH
	Downlink power of user to the RRH
	Uplink power of user to the UAV
	Downlink power of user to the UAV
	Maximum service distance of RF unit
	Antenna gain of macro cell, RRH, and UAV
	Channel gain when the -th user is connected to the macro cell, RRH, and UAV
	Path loss when users connect to the macro cell and RRH
	Distance between user and RRH
	Distance between user and RRH
	The , , and coordinates of the drone in the Cartesian plane
	2D distance between user and drone
	LoS probability of user and drone
	Average path loss under drone LoS conditions
	Average path loss under drone NLoS conditions
	Average additional loss in LoS or NLoS links relative to free space propagation loss
	Average path loss when the user is connected to the drone
	Channel capacity when user connects to eNB
	Channel capacity when user connects to RRH
	Channel capacity when user connects to UAV
	User channel capacity matrix
	User associated cell indicator matrix
	Association indicator
	Minimum channel capacity requirement of user n
	Minimum channel capacity requirement matrix
	User antenna height factor