Temel Kavramlar
A three-layer heterogeneous network with UAV-BSs for radio access and HAPS-SMBS for backhaul, along with a two-layer clustering algorithm, can effectively extend the lifespan of temporary communication networks during disaster scenarios.
Özet
The content discusses a novel approach to providing communication services in disaster situations where traditional terrestrial networks are damaged or unavailable. The proposed solution involves a three-layer heterogeneous network architecture:
- The first layer consists of user equipment (UEs) distributed around the affected area.
- The second layer comprises uncrewed aerial vehicle base stations (UAV-BSs) that provide radio access network (RAN) services to the UEs.
- The third layer features a high-altitude platform station (HAPS) equipped with a super macro base station (SMBS) that serves as the backhaul for the UAV-BSs.
To efficiently manage this multi-tier network, the authors propose a two-layer clustering algorithm:
- The first-layer clustering is used to position the UAV-BSs based on the distribution of UEs, which are grouped into clusters.
- The second-layer clustering is applied to the UAV-BSs to determine the cluster heads (H-UAVs) that will establish the backhaul connection with the HAPS-SMBS, while the remaining non-head UAVs (NH-UAVs) will form an ad-hoc network to transmit their data to the H-UAVs.
This approach aims to prolong the lifespan of the temporary communication network by minimizing the energy consumption of the battery-powered UAV-BSs, as the H-UAVs are positioned at grid-powered landing spots to ensure a continuous power supply.
The performance of the proposed solution is evaluated and compared to two benchmark approaches, demonstrating its effectiveness in reducing the overall energy consumption and extending the network's operational duration during disaster scenarios.
İstatistikler
The environment area is 3 km × 3 km.
HAPS is located 20 km above the center of the environment.
The UAVs are distributed around the environment with an altitude of 150 m.
Alıntılar
"HAPS spark attention as they can be deployed as super macro base stations (SMBS) and data centers."
"Only H-UAV—positioned at a pre-designated location that has a grid power connection as well as uninterrupted power supply—has a backhaul link to prolong the network lifespan, because the energy consumption of non-head UAVs (referred to as NH-UAVs) for the backhaul connection is eliminated in our proposed topology."