2D	Two Dimensional
3D	Three Dimensional
4G	4th Generation
5G	5th Generation
6G	6th Generation
AP	Access Point
API	Application Programing Interface
BS	Base Station
BVLoS	Beyond Visual Line of Sight
D2D	Device–To–Device
DTN	Delay Tolerant Networking
FAA	Federal Aviation Administration
GPS	Global Positioning System
HetNets	Heterogeneous Networks
HO	Handover
H–RRM	HO and Radio Resource Management
ICIC	Inter–Cell Interference Coordination
LC	Loaded Cells
LoS	Line of Sight
UDCUN	Ultra–Dense Cloud–UAV Network
UDN	Ultra–Dense Networks
UE	User Equipment
UL	Uplink
UxNB	UAV–Mounted Bs
LTE	Long Term Evolution
LWA	Leaky–Wave Antenna
mcMTC	Mission–Critical Machine–Type Communication
MIMO	Multiple Input Multiple Output
mm–wave	Millimeter Waves
OTT	Over–The–Top
Pf	False Ho Initiation Probability
Ps	Seamless Ho Success Probability
QoS	Quality of Service
RLF	Radio Link Failure
eNB	evolved Node BS
UAV	Unmanned Aerial Vehicle
RSS	Received Signal Strength
SDN	Software–Defined Networking
SINR	Signal–To–Interference–Plus–Noise Ratio
SWAP	Size, Weight, And Power
THz	Terahertz
TCP/IP	Transmission Control Protocol/Internet Protocol
FANET	Flying Ad–Hoc Network
VR	Virtual Reality
WLAN	Wireless Local Area Network
RWP	Random Waypoint
WWAN	Wireless Wide Area Network
RW	Random Walk