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In this paper, we consider a dual-band communication system, where a base station (BS) can communicate with a user equipment (UE) over either the sub-6GHz band or the millimeter wave (mmWave) band. We consider the joint detection of the blockage status of the BS-UE link and the optimization of the downlink rate through frequency band scheduling and beamforming design. Typically, the blockage detec...Show More
Joint Beamforming, Scheduling, Trajectory, and Transmit Power Optimization in UAV-Assisted ISAC Systems for Information Freshness
Yuting He;Qingjie Wu;Miao Cui;Yuan Peng;Guangchi Zhang;Wei Chen
In this paper, we consider a system that integrates an unmanned aerial vehicle (UAV) for sensing and communication. The UAV is responsible for communication with multiple users and sensing targets for multiple users. Our objective is to minimize the age of information (AoI) of the sensory data by jointly optimizing the scheduling, transmit beamforming, trajectory, and transmit power of the UAV, wh...Show More
Latency Minimization for UAV-Enabled URLLC-Based Mobile Edge Computing Systems
Qingjie Wu;Miao Cui;Guangchi Zhang;Feng Wang;Qingqing Wu;Xiaoli Chu
In this paper, we consider an unmanned aerial vehicle (UAV)-enabled mobile edge computing (MEC) system, where multiple ground devices offload portions of their latency-sensitive and mission-critical computational tasks to a UAV-carried MEC server for remote computing and compute the remaining portions locally. To meet the low-latency requirements of the MEC, ultra-reliable and low-latency communic...Show More
Robust Transmit and Reflect Beamforming Design for IRS-Assisted Offshore NOMA Communication Systems
Kangbai Li;Miao Cui;Guangchi Zhang;Qingqing Wu;Dong Li;Jiguang He
We consider a non-orthogonal multiple access (NOMA) offshore communication system, where an intelligent reflecting surface (IRS) is deployed to assist the communication from a terrestrial base station (BS) to two ship users, and the channel state information (CSI) of the BS-user and BS-IRS channels is imperfect due to these channels' time-varying nature caused by wave fluctuation. By applying the ...Show More
Resource Allocation and Deployment Optimization for UAV-Assisted SPC-Based MEC Systems
2023 IEEE/CIC International Conference on Communications in China (ICCC Workshops)
Year: 2023 | Conference Paper |
We consider an unmanned aerial vehicle (UAV)assisted mobile edge computing (MEC) system, where a UAV-carried MEC server provides computation offloading service to multiple ground user equipment (UEs). To satisfy the low-latency requirement of the MEC, the short-packet communication (SPC) is used for the task offloading from the UEs to the UAV. The maximum computation latency among all the UEs is m...Show More
Task Completion Time Minimization for UAV-Enabled Data Collection in Rician Fading Channels
Tianyu Liu;Guangchi Zhang;Miao Cui;Changsheng You;Qingqing Wu;Shaodan Ma;Wei Chen
IEEE Internet of Things Journal
Cited by: Papers (13)
In wireless sensor networks, unmanned aerial vehicles (UAVs) can be employed to collect data from sensor nodes (SNs) efficiently. In this article, we consider a dual-UAV-enabled (long-distance) data collection system, where one UAV is dispatched to collect data from distributed SNs, while the other UAV is employed to relay data from the data-collection UAV to a fusion center (FC) that locates far ...Show More
UAV-Enabled Wireless Powered Communication Networks for Over-the-Air Computation
2022 IEEE/CIC International Conference on Communications in China (ICCC)
Year: 2022 | Conference Paper |
Cited by: Papers (2)
This paper investigates an unmanned aerial vehicle (UAV)-enabled wireless powered communication network for over-the-air computation, where the UAV is employed as a hybrid access point to serve multiple terrestrial sensors. Specifically, the sensors harvest energy from the signal sent by the UAV, which is then used by the sensors to support their uplink data aggregation of sampled data. We aim to ...Show More
Deep Reinforcement Learning-Based Optimization for IRS-Assisted Cognitive Radio Systems
Canwei Zhong;Miao Cui;Guangchi Zhang;Qingqing Wu;Xinrong Guan;Xiaoli Chu;H. Vincent Poor
In this paper, we consider an intelligent reflecting surface (IRS)-assisted cognitive radio system and maximize the secondary user (SU) rate by jointly optimizing the transmit power of secondary transmitter (ST) and the IRS’s reflect beamforming, subject to the constraints of the minimum required signal-to-interference-plus-noise ratio at the primary receiver, the ST’s maximum transmit power, and ...Show More
Joint Optimization for Multi-Antenna AF-Relay Aided Over-the-Air Computation
Benefiting from exploiting the waveform superposition property in the multi-access channels, over-the-air computation (AirComp) has emerged as a promising technique to swiftly compute functions of data from a large number of sensors. To enlarge the wireless coverage area, a two-phase multi-antenna amplify-and-forward (AF)-relay aided AirComp system is considered, where all the sensors transmit sen...Show More
Statistically Robust Transceiver Design for Multi-RIS Assisted Multi-User MIMO Systems
IEEE Communications Letters
Cited by: Papers (17)
In this letter, we investigate the robust transceiver design for a downlink multi-user multiple-input multiple-output (MIMO) system assisted by multiple reconfigurable intelligent surfaces (RISs), where the base station (BS) and multiple users are all equipped with multiple antennas. Different from most previous RIS related works focusing on worst-case performance optimization, which may lead to o...Show More
Cooperative UAV Enabled Relaying Systems: Joint Trajectory and Transmit Power Optimization
Guangchi Zhang;Xiaoqi Ou;Miao Cui;Qingqing Wu;Shaodan Ma;Wei Chen
Unmanned aerial vehicles (UAVs) can be used as aerial relays to provide quick and on-demand wireless connections for the area without network coverage. Since a UAV’s onboard energy is limited, how to prolong the duration of UAV relaying communication is challenging. In this paper, we consider applying multiple UAVs to extend the duration of communication via UAV collaboration. We first propose a U...Show More
Achievable Rate Region Maximization in Intelligent Reflecting Surfaces-Assisted Interference Channel
In the achievable rate region maximization for intelligent reflecting surfaces (IRSs)-assisted interference channel (IFC), where more than one pair of transceivers communicates and interferes with each other simultaneously. Specifically, we optimize the transmit power and passive beamforming vectors at all the IRSs to obtain the Pareto boundary of the achievable rate region in IFC, subject to the ...Show More
Joint Beamforming Optimization in Multi-Relay Assisted MIMO Over-the-Air Computation for Multi-Modal Sensing Data Aggregation
IEEE Communications Letters
Cited by: Papers (10)
In this letter, we investigate a multi-relay assisted over-the-air computation network for multi-modal sensing with direct links, where each node is equipped with multiple antennas and all the relays are operated in an amplify-and-forward mode. Specifically, the whole transmission is divided into two phases and all the sensors transmit symbols during both two phases. In particular, we are interest...Show More
Achievable Rate Maximization for Intelligent Reflecting Surface-Assisted Orbital Angular Momentum-Based Communication Systems
The orbital angular momentum (OAM)-based communication systems may face severe transmission problems when the transmit and receive uniform circular array pairs are blocked. In this paper, a promising technique named intelligent reflecting surface (IRS) is proposed to help alleviate blockages and provide alternative line-of-sight links. To maximize the achievable rate of the IRS-assisted OAM commun...Show More
Throughput Maximization for IRS-Assisted Wireless Powered Hybrid NOMA and TDMA
Dingcai Zhang;Qingqing Wu;Miao Cui;Guangchi Zhang;Dusit Niyato
The high reflect beamforming gain of the intelligent reflecting surface (IRS) makes it appealing not only for wireless information transmission but also for wireless power transfer. In this letter, we consider an IRS-assisted wireless powered communication network, where a base station (BS) transmits energy to multiple users grouped into multiple clusters in the downlink, and the clustered users t...Show More
Dynamic Computation Offloading in Ultra-Dense Networks Based on Mean Field Games
Renjun Zheng;Haibo Wang;Matthieu De Mari;Miao Cui;Xiaoli Chu;Tony Q. S. Quek
In ultra-dense networks, the increasing popularity of computation intensive applications imposes challenges to the resource-constrained smart mobile devices (SMDs), which may be solved by offloading these computation tasks to the nearby mobile edge computing centers. However, when massive SMDs offload computation tasks in a dynamic wireless environment simultaneously, the joint optimization of the...Show More
3D Trajectory and Transmit Power Optimization for UAV-Enabled Multi-Link Relaying Systems
Tianyu Liu;Miao Cui;Guangchi Zhang;Qingqing Wu;Xiaoli Chu;Jing Zhang
Unmanned aerial vehicles (UAVs) have the advantages of high mobility, remarkable versatility, and on-demand deployment, which lead to their wide applications in various industries. In disasters or other emergency events, UAV-enabled relaying can provide a temporary wireless connection for the affected area. Thus, a UAV-enabled multi-link relaying system is considered in this article, where multipl...Show More
This paper considers an unmanned aerial vehicle (UAV) base station (BS) network with delay-sensitive users and delay-tolerant users on the ground, which have different quality-of-service (QoS) requirements. In the network, the backhaul link connecting the backhaul gateway and the UAV-BS shares the same spectrum with the data links connecting the UAV-BS and the users due to spectrum scarcity. To im...Show More
Unmanned aerial vehicle (UAV) relaying is one of the main technologies for UAV communications. It uses UAVs as relays in the sky to provide reliable wireless connection between remote users. In this paper, we consider a multi-hop UAV relaying system. To improve the spectrum efficiency of the system, we maximize the average end-to-end throughput from the source to the destination by jointly optimiz...Show More
Secure Wireless Communication via Intelligent Reflecting Surface
An intelligent reflecting surface (IRS) can adaptively adjust the phase shifts of its reflecting units to strengthen the desired signal and/or suppress the undesired signal. In this letter, we investigate an IRS-aided secure wireless communication system where a multi-antenna access point (AP) sends confidential messages to a single-antenna user in the presence of a single-antenna eavesdropper. In...Show More
Securing UAV Communications via Joint Trajectory and Power Control
Unmanned aerial vehicle (UAV) communication is anticipated to be widely applied in the forthcoming fifth-generation wireless networks, due to its many advantages such as low cost, high mobility, and on-demand deployment. However, the broadcast and line-of-sight nature of air-to-ground wireless channels give rise to a new challenge on how to realize secure UAV communications with the destined nodes...Show More
Unmanned aerial vehicles (UAVs) have found important applications in wireless communications due to their ability for on-demand and swift deployment, high mobility, and high probability of line-of-sight communication link with the ground. For UAV-enabled wireless communications, one of the main use cases is UAV relaying, where UAVs are deployed as flying relays in the sky to provide wireless conne...Show More
Robust Trajectory and Transmit Power Design for Secure UAV Communications
Unmanned aerial vehicles (UAVs) are anticipated to be widely deployed in future wireless communications, due to their advantages of high mobility and easy deployment. However, the broadcast nature of airto-ground line-of-sight wireless channels brings a new challenge to the information security of UAV-ground communication. This paper tackles such a challenge in the physical layer by exploiting the...Show More
Wireless Powered Cooperative Jamming for Secure OFDM System
This paper studies the secrecy communication in an orthogonal frequency division multiplexing system, where a source sends confidential information to a destination in the presence of a potential eavesdropper. We employ wireless powered cooperative jamming to improve the secrecy rate of this system with the assistance of a cooperative jammer, which works in the harvest-then-jam protocol over two t...Show More
Throughput maximization for wireless powered non-orthogonal multiple access networks with multiple antennas
2017 23rd Asia-Pacific Conference on Communications (APCC)
Year: 2017 | Conference Paper |
Cited by: Papers (3)
The non-orthogonal multiple access (NOMA) technique can provide higher spectral efficiency and massive connectivities to wireless networks. The wireless power transfer (WPT) technique is a controllable and promising way to solve the energy scarcity problem of wireless devices. In this paper, we introduce the NOMA and WPT techniques into a multi-user wireless network, where multiple users need to t...Show More
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