Video here. Ahmed Alkhateeb and his students has advanced mmWave beam prediction which they are using to track and communicate with drones. That isn't easy; 3GPP 5G requires a robust back channel to conform the cell signal to the receiver. That's hard with a small, fast-moving drone.
3 years ago, Vodafone, Saudi Telecom, and I believe Verizon all promised drone tracking in the near future. None of them seem to be close to delivering it. But look at the video of the work a team of grad students has done.
They use visual and GPS tracking to optimize the coding. This reduces the computation required and the heat generated.