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Airborne (or flying) base stations (ABSs) embedded on drones or unmannedaerial vehicles (UAVs) can be deemed as a central element of envisioned 6Gcellular networks where significant cell densification with mmWave/Terahertzcommunications will be part of the ecosystem. Nonetheless, one of the keychallenges facing the deployment of ABSs is the inherent limited availableenergy of the drone, which limits the hovering time for serving ground users tothe orders of minutes. This impediment deteriorate the performance of theUAV-enabled cellular network and hinders wide adoption and use of thetechnology. In this paper, we propose robotic airborne base stations (RABSs)with grasping capabilities to increase the serving time of ground users bymultiple orders of magnitude compared to nominal hovering based operation. Morespecifically, to perform the grasping task, the RABS is equipped with aversatile, albeit, general purpose gripper manipulator. Depending on the typeof the gripper RABS can provide service in the range of hours, compared tominutes of hovering based ABSs. In theory it is possible that grasping can beenergy neutral, hence the time of service can be bounded by the communicationsenergy consumption. To illustrate the case, energy consumption comparisonbetween hovering and grasping is performed in order to reveal the significantbenefits of the proposed approach. Finally, overarching challenges, designconsiderations for RABS, and future avenues of research are outlined to realizethe full potential of the proposed robotic aerial base stations.

Airborne Urban Microcells with Grasping End Effectors: A Game Changer for 6G Networks?