arXiv subjects

Duy-Tuan Dao

Publications and source records attributed to Duy-Tuan Dao.

3 recordsLinked to original sources

arXiv2026

Modulating Retroreflector-Aided UAV-Based FSO/QKD Systems

Unmanned aerial vehicles (UAVs)-based free-space optics (FSO)/quantum key distribution (QKD) systems require high-precision pointing mechanisms. This increases system complexity and limits rapid deployment for lightweight and energy-constrained UAVs. This paper proposes a modulating retroreflector (MRR)-equipped UAV architecture for BB84-QKD systems that enables simplified yet accurate tracking while relaxing pointing requirements. A realistic quantum channel model is developed, for which we newly derive the channel probability distribution of transmittance (PDT). Capitalizing on the derived channel PDT, several QKD performance metrics are analytically obtained. Numerical results verify the feasibility of the proposed MRR-aided UAV for practical QKD deployment, highlight its effectiveness over conventional UAV-ground systems, and validate the accuracy of the developed analytical framework.

cs.NI↗

arXiv2026

Sharing-oriented Resource Allocation for Multi-platoon's Groupcasting and Unicasting Communication based on the Transmission Reliability

Resource allocation in vehicular platoons is challenging due to high vehicle mobility and limited spectrum resources. To improve spectral efficiency, resource sharing is commonly adopted. In 5G-based platoons, the Platoon Leader Vehicle (PLV) employs groupcasting to disseminate control messages to Platoon Member Vehicles (PMVs). When the groupcasting power is insufficient, a selected PMV acts as a Platoon Relay Vehicle (PRV) to extend the communication range. In addition, PMVs transmit unicast control messages to the vehicles following them for emergency coordination. This work proposes a sharing-oriented resource allocation method for both groupcasting and unicasting communication based on transmission reliability. For groupcasting, the proposed Tripartite Matching for Platoon Groupcasting (TMPG) algorithm applies tripartite matching to allocate subchannels shared by a PLV/PRV and corresponding individual entities (IEs), which denote cellular users or non-platooning vehicles. For unicasting, the proposed Resource Sharing for Platoons Unicasting (RSPU) algorithm (i) firstly partitions PMVs into clusters by considering intra-cluster interference and then (ii) uses tripartite matching to allocate a subchannel that is shared by a cluster of PMVs and the corresponding IE. Simulation results demonstrate that the proposed methods outperform benchmark schemes in terms of Quality of Service (QoS) satisfaction, the number of allocated subchannels, and spectral efficiency.

cs.NI↗

arXiv2024

Reliability-considered Multi-platoon's Groupcasting using the Resource Sharing Method

In the context of 5G platoon communications, the Platoon Leader Vehicle (PLV) employs groupcasting to transmit control messages to Platoon Member Vehicles (PMVs). Due to the restricted transmission power for groupcasting, it may need to pick one PMV as the Platoon Relay Vehicle (PRV) to be responsible for re-groupcasting messages of PLVs. To optimize the usage of limited spectrum resources, resource sharing can adopted to enhance spectrum efficiency within the platoon. This study proposes a resource allocation method, which is called Resource Sharing for Platoon Groupcasting (RSPG), for platoon groupcasting based on transmission reliability. RSPG utilizes tripartite matching to assign a subchannel to either a PLV or PRV that shares the assigned subchannel with the corresponding individual entity (IE), which does not belong to any platoon. The simulation results show that the proposed method performs better in terms of the QoS satisfaction rate of IEs, the number of allocated subchannels for platoons, and spectral efficiency.

cs.NI↗