Achieving Sustainable Ultra-Dense Heterogeneous Networks for 5G

An, Jianping; Yang, Kai; Wu, Jinsong; Ye, Neng; Guo, Song; Liao, Zhifang

doi:10.1109/mcom.2017.1700410

Cited by 227 publications

(98 citation statements)

References 14 publications

(19 reference statements)

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“…The flight power consumption for the rotary-wing UAV is a function of its flight velocity. In particular, the flight power 5 We assume that all the antennas have roughly the same distance between the jammer UAV and user k. In fact, this assumption generally holds as antenna separation at the jammer is generally much shorter compared to the distance between the jammer UAV and ground users. consumption models of the information UAV and the jammer UAV are given by [31]:…”

Section: Uav Power Consumption Modelmentioning

confidence: 99%

Joint Trajectory and Resource Allocation Design for Energy-Efficient Secure UAV Communication Systems

Cai

Wei

et al. 2020

IEEE Trans. Commun.

203

125

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In this paper, we study the trajectory and resource allocation design for downlink energy-efficient secure unmanned aerial vehicle (UAV) communication systems, where an information UAV assisted by a multi-antenna jammer UAV serves multiple ground users in the existence of multiple ground eavesdroppers. The resource allocation strategy and the trajectory of the information UAV, and the jamming policy of the jammer UAV are jointly optimized for maximizing the system energy efficiency. The joint design is formulated as a non-convex optimization problem taking into account the quality of service (QoS) requirement, the security constraint, and the imperfect channel state information (CSI) of the eavesdroppers. The formulated problem is generally intractable. As a compromise approach, the problem is divided into two subproblems which facilitates the design of a low-complexity suboptimal algorithm based on alternating optimization approach. Simulation results illustrate that the proposed algorithm converges within a small number of iterations and demonstrate some interesting insights: (1) the introduction of a jammer UAV facilitates a highly flexible trajectory design of the information UAV which is critical to improving the system energy efficiency; (2) by exploiting the spatial degrees of freedom brought by the multi-antenna jammer UAV, our proposed design can focus the artificial noise on eavesdroppers offering a strong security mean to the system.

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Section: Uav Power Consumption Modelmentioning

confidence: 99%

Joint Trajectory and Resource Allocation Design for Energy-Efficient Secure UAV Communication Systems

Cai

Wei

et al. 2020

IEEE Trans. Commun.

203

125

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“…When multicell or dense-network scenario is considered [46], the uplink PD-NOMA would increase the intercell interference (ICI) because multiple users are allowed to transmit on the shared carriers. Therefore, user association and ICI-aware power allocation should also be studied to control the transmission power and avoid causing severe ICI to the neighboring cells [47,47].…”

Section: Pd-noma Pd-nomamentioning

confidence: 99%

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Han

Zhao

et al. 2018

Wireless Communications and Mobile Computing

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Owing to the superior performance in spectral efficiency, connectivity, and flexibility, nonorthogonal multiple access (NOMA) is recognized as the promising access protocol and is now undergoing the standardization process in 5G. Specifically, dozens of NOMA schemes have been proposed and discussed as the candidate multiple access technologies for the future radio access networks. This paper aims to make a comprehensive overview about the promising NOMA schemes. First of all, we analyze the state-of-the-art NOMA schemes by comparing the operations applied at the transmitter. Typical multiuser detection algorithms corresponding to these NOMA schemes are then introduced. Next, we focus on grant-free NOMA, which incorporates the NOMA techniques with uplink uncoordinated access and is expected to address the massive connectivity requirement of 5G. We present the motivation of applying grant-free NOMA, as well as the typical grant-free NOMA schemes and the detection techniques. In addition, this paper discusses the implementation issues of NOMA for practical deployment. Finally, we envision the future research challenges deduced from the recently proposed NOMA technologies.

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“…The rapid growing demand on wireless communication services, e.g. ultra-high data rates and massive connectivity [2], has fueled the development of wireless networks and the mass productions of wireless devices. Despite the fruitful research in the literature for providing ubiquitous services, the performance of wireless systems is limited by the users with poor channel conditions [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Resource Allocation for Secure Multi-UAV Communication Systems With Multi-Eavesdropper

Wei

Yang

et al. 2020

IEEE Trans. Commun.

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In this paper, we study the resource allocation and trajectory design for secure unmanned aerial vehicle (UAV)-enabled communication systems, where multiple multi-purpose UAV base stations are dispatched to provide secure communications to multiple legitimate ground users (GUs) in the existence of multiple eavesdroppers (Eves). Specifically, by leveraging orthogonal frequency division multiple access (OFDMA), active UAV base stations can communicate to their desired ground users via the assigned subcarriers while idle UAV base stations can serve as jammer simultaneously for communication security provisioning. To achieve fairness in secure communication, we maximize the average minimum secrecy rate per user by jointly optimizing the communication/jamming subcarrier allocation policy and the trajectory of UAVs, while taking into account the constraints on the minimum safety distance among multiple UAVs, the maximum cruising speed, the initial/final locations, and the existence of cylindrical no-fly zones (NFZs). The design is formulated as a mixed integer non-convex optimization problem which is generally intractable. Subsequently, a computationally-efficient iterative algorithm is proposed to obtain a suboptimal solution. Simulation results illustrate that the performance of the proposed iterative algorithm can significantly improve the average minimum secrecy rate compared to various baseline schemes. R. Li and J. An are with the secure UAV communication systems with a single-UAV was studied in [8], [14]-[16] with different system settings. However, due to the stringent requirements on UAV's size, weight, and power (SWAP), the performance achieved by deploying a single-UAV is still limited [6]. To achieve a higher efficiency in secure communications, multi-UAV cooperation was adopted in [17]-[20]. In particular, a jammer UAV can fly close to a potential eavesdropper based on demand by leveraging its mobility and opportunistically transmits artificial noise signal deliberately to combat the eavesdropping channels [17]. To improve the system security performance, [18] and [19] presented a cooperative jamming approach to safeguard the UAV's communication by exploiting artificial jamming transmission from other friend UAVs in the existence of a single-eavesdropper. With the consideration of fairness in two-UAV secure communications, [20] investigated the joint power allocation and trajectory design for the maximization of the minimum secrecy rate per user when one UAV is dispatched to convey confidential messages to a ground user where another cooperative UAV transmits a jamming signal. However, in [17]-[20], the role of the UAV is fixed where a communication/jamming UAV can only provide either communication/jamming signal during the whole time horizon.In contrast, a multi-purpose UAV, which can dynamically serve as a communication UAV or a jamming UAV, provides a high flexibility in trajectory design for secure UAV communications. March 17, 2020 DRAFT 3 For instance, when a communication UAV flies closer to an eave...

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Achieving Sustainable Ultra-Dense Heterogeneous Networks for 5G

Cited by 227 publications

References 14 publications

Joint Trajectory and Resource Allocation Design for Energy-Efficient Secure UAV Communication Systems

Joint Trajectory and Resource Allocation Design for Energy-Efficient Secure UAV Communication Systems

Uplink Nonorthogonal Multiple Access Technologies Toward 5G: A Survey

Resource Allocation for Secure Multi-UAV Communication Systems With Multi-Eavesdropper

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