| （英） |
With the growing adoption of VR and digital twin technologies, there is an increasing demand for high-speed and high-capacity communication. To meet these requirements, the use of new wireless frequencies (New Radio) is advancing. However, the evolution of existing protocols has not kept pace, leading to challenges in optimizing communication quality. For instance, while millimeter-wave (mmWave) technology, which provides high bandwidth, is being explored, current widely-used TCP congestion control mechanisms are not optimized for mmWave environments. In particular, in non-line-of-sight environments, obstacles such as human bodies and buildings cause significant channel variability due to signal blockage. This results in difficulty managing the congestion window appropriately, leading to throughput degradation. In this study, we propose a cross-layer CUBIC-TCP that controls the occurrence and suppression of timeouts based on the signal-to-interference-plus-noise ratio (SINR) and received Ack packets. We demonstrate that this approach improves throughput by up to 64% compared to conventional CUBIC-TCP. |