Cooperative clustering for enhancing MU-massive-MISO-based UAV communication
AssigneeThe Florida International University Board of Trustees
InventorsNadisanka Rupasinghe, Ismail Guvenc, Ahmed Salah Ibrahim Mohamed
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Abstract
Methods, apparatuses, and systems for organizing data delivering unmanned aerial vehicles (UAVs) are provided. Inter-cluster coordinators can organize data delivering unmanned aerial vehicle base stations (UAV-BSs). Various beamforming techniques (e.g., LZFBF and ZFBF) can be incorporated, and the inter-cluster coordinator can operate on a base station that serves as a controlling network node.
Claims17
A method for identifying optimum hovering locations for unmanned aerial vehicle base stations (UAV-BSs) communications, the method comprising:
- identifying user locations;
- defining a hovering grid that includes the user locations;
- determining an absolute value of directional cosine separation |Ωk,un| for each grid point, which is the separation between directional cosines between the uth user and the kth user of the nth UAV-BS;
- detecting all grid points (y,z) with directional cosine separation |Ωk,un|=2/Nt×q and q≤Nt−1, wherein Nt is the number of antenna arrays for the nth UAV-BS and q is an integer;
- calculating the distance from all grid points (y,z) to each user;
- and
- assigning grid point (y,z) to the UAV-BSs (yn,zn) based on the minimum distance to their intended user.
An inter-cluster coordinator for identifying optimum hovering locations for unmanned aerial vehicle base stations (UAV-BSs) comprising a processor, volatile and non-volatile memory, antennas suitable for communicating with the unmanned aerial vehicle base stations (UAV-BSs) and a non-transitory machine-readable medium with computer executable instructions stored thereon that when executed by a processor perform the method of:
- identifying user locations;
- defining a hovering grid that includes the user locations;
- determining an absolute value of directional cosine separation |Ωk,un| for each grid point, which is the separation between directional cosines between the uth user and the kth user of the nth UAV-BS;
- detecting all grid points (y,z) with directional cosine separation |Ωk,un|=2/Nt×q and q≤Nt−1, wherein Nt is the number of uniform linear antenna arrays for the nth UAV-BS and q is an integer;
- calculating the distance from all grid points (y,z) to each user;
- and
- assigning grid point (y,z) to the UAV-BSs (yn,zn) based on the minimum distance to their intended user.
Dependencies are inferred from the claim text.