| CPC H04W 4/12 (2013.01) [H04W 76/10 (2018.02); H04W 84/06 (2013.01)] | 20 Claims |

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1. A bi-directional communication system for controlling Unmanned Aerial Vehicles (UAVs), the bi-directional communication system comprising:
a GCS terminal, configured to divide UAVs into at least two groups of UAVs characterized by two different identity masks, sequentially establish connection with each group of UAVs, and exchange flight control data with UAVs, the GCS terminal comprising:
a first communication unit of the GCS configured to:
select a first group of UAVs,
broadcast a first message with a radio module to all UAVs, wherein the first broadcasting message comprises an identity mask of the first group of UAVs and a command to activate a wireless communication module on each UAV from the first group of UAVs, and
broadcast a second message with a radio module to all UAVs, wherein the second broadcasting message comprises an identity mask of a second group of UAVs and a command to deactivate a wireless communication module on each UAV from the second group of UAVs; and
a second communication unit of the GCS configured to:
establish a wireless exchange link with the activated wireless communication module of each UAV in the first group of UAVs, and
exchange flight control data with each UAV in the first group of UAVs over the wireless exchange link.
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