Medium Acces Control with Optimal Beamwidth Adjustment for THz Band Drone Communications

With the growth in wireless data traffic, Terahertz (THz)-band communication has emerged as a promising technology to enable ultra-high-speed wireless networks. However, THz communication faces unique challenges such as high path loss, molecular absorption, and severe misalignment. In this paper, we propose a Medium Access Control (MAC) protocol for THz-band drone-to-drone (Dr2Dr) communication, building upon the Adaptive Directional Antenna Protocol for THz networks (ADAPT) framework, where we integrate an optimal beamwidth adjustment (OBA) algorithm that dynamically optimizes the beamwidth to overcome the misalignment issues and increase communication reliability. The proposed protocol leverages the 3-way handshake mechanism to estimate node positions and adapts the beamwidth accordingly, maximizing directional gains. Through extensive simulations, we have demonstrated that our method improves throughput and reduces delay compared to ADAPT without OBA.