UAV Positioning and Power Control for Two-Way Wireless Relaying

Li, Lei; Chang, Tsung-Hui; Cai, Shu

doi:10.1109/twc.2019.2950301

Cited by 63 publications

(33 citation statements)

References 29 publications

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“…Two-way relaying (TWR) is capable of supporting information exchange between users in two steps [20]- [24]. Various UAV-aided TWR systems were considered in [25], [26]. Explicitly in [25], the joint design of UAV position and transmission power optimization was used for maximizing the sum rate, while in [26] the minimum average rate maximization was considered by the joint design of the UAV trajectory, transmit power and bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…Various UAV-aided TWR systems were considered in [25], [26]. Explicitly in [25], the joint design of UAV position and transmission power optimization was used for maximizing the sum rate, while in [26] the minimum average rate maximization was considered by the joint design of the UAV trajectory, transmit power and bandwidth. However, the information exchange in [25], [26] is arranged via half-duplex (HD) operation.…”

Section: Introductionmentioning

confidence: 99%

“…Explicitly in [25], the joint design of UAV position and transmission power optimization was used for maximizing the sum rate, while in [26] the minimum average rate maximization was considered by the joint design of the UAV trajectory, transmit power and bandwidth. However, the information exchange in [25], [26] is arranged via half-duplex (HD) operation. Furthermore, the deployment of FD [27]- [33] at all nodes using separate transmit and receive antennas for simultaneous signal transmission and reception dispenses with separate transmit/receive time slots.…”

Section: Introductionmentioning

confidence: 99%

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UAV-Aided Two-Way Multi-User Relaying

Sheng

Tuan

Hanzo

2021

IEEE Trans. Commun.

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Unmanned aerial vehicle (UAV)-aided two-way relaying networks are designed, where a UAV is deployed to assist multiple pairs of users in their information exchange. There are two basic approaches for the user pairs' information exchange within a single time slot via the UAV relay. The first approach is based on full-duplex, where all participants operate in the full-duplex mode to transmit and receive signals simultaneously. However, all transceivers have to operate in the face of severe self-interference, which cannot be completely suppressed. The second approach is based on conventional half-duplex, where the users send their information to the UAV within a certain fraction of the time slot, and the UAV relays them within the remaining fraction to avoid the self-interference. In either approach, the joint bandwidth and power allocation maximizing the sum information exchange throughput under realistic resource and user throughput constraints poses a complex nonconvex problem. New inner approximations are proposed for developing path-following algorithms for their computation. Our numerical results show that the time-fraction-based half-duplex approach clearly outperforms the high-complexity full-duplex approach.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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UAV-Aided Two-Way Multi-User Relaying

Sheng

Tuan

Hanzo

2021

IEEE Trans. Commun.

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“…In [9], HU et al considered the energy consumption minimization problem in UAV-assisted relay system, where UAV is regarded as a computation server for user equipments (UEs) and forwards the result to the access point. In [10], Li et al provided a UAV-enable two-way relay system, where a set of UEs was considered. The UAV trajectory and the transmit power of all terminals were jointly optimized to maximize the sum rate of UEs.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization for Uav-enabled Two-way Relaying System With Swipt

Wang

Wang²,

Chen

et al. 2020

Preprint

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In this paper, we investigate the resource allocation scheme for an unmanned-aerial-vehicle-enable (UAV-enabled) two-way relaying system with simultaneous wireless information and power transfer (SWIPT), where two user equipments (UEs) exchange information with the help of UAV relay and harvest energy through power splitting (PS) scheme. Under the transmission power constraints at UEs and UAV relay, a non-convex intractable optimization problem is formulated which maximizes the sum retained energy of two UEs while satisfying the minimum signal-to-noise ratio requirement. We decouple the complicated beamforming and PS factors optimization problem into three solvable subproblems and propose an efficient alternating optimization scheme. Subsequently, in order to reduce the complexity, a robust scheme based on generalized singular value decomposition (GSVD) is designed. Finally, numerical results verify the robustness and effectiveness of two proposed schemes.

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“…Compared with one-way relay system, two-way relay system has higher spectrum efficiency. In [10], Li et al provided a UAV-enable two-way relay system, where a set of UEs was considered. The UAV trajectory and the transmit power of all terminals were jointly optimized to maximize the sum rate of UEs.…”

Section: Introductionmentioning

confidence: 99%

Design and Optimization for UAV-Enabled Two-Way Relaying System with SWIPT

Wang

Wang²,

Chen

et al. 2020

Preprint

View full text Add to dashboard Cite

In this paper, we investigate the resource allocation scheme for an unmanned-aerial-vehicle-enable (UAV-enabled) two-way relaying system with simultaneous wireless information and power transfer (SWIPT), where two userequipment exchange information with the help of UAV relay and harvest energythrough power splitting (PS) scheme. Under the transmission power constraintsat UEs and UAV relay, a non-convex intractable optimization problem isformulated which maximizes the sum retained energy of two UEs while satisfying the minimum signal-to-noise ratio requirement. We decouple the complicated beamforming and PS factors optimization problem into three solvable subproblems and propose an efficient alternating optimization scheme. Subsequently, in order to reduce the complexity, a robust scheme based on generalized singular value decomposition (GSVD) is designed. Finally, numerical results verify the robustness and effectiveness of two proposed schemes.

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UAV Positioning and Power Control for Two-Way Wireless Relaying

Cited by 63 publications

References 29 publications

UAV-Aided Two-Way Multi-User Relaying

UAV-Aided Two-Way Multi-User Relaying

Design and Optimization for Uav-enabled Two-way Relaying System With Swipt

Design and Optimization for UAV-Enabled Two-Way Relaying System with SWIPT

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