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Distributionally robust optimization based chance-constrained energy management for hybrid energy powered cellular networks

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Digital Communications and networks 2023年第3期9卷 797-808页

作者： Pengfei Du Hongjiang Lei Imran Shafique Ansari Jianbo Du Xiaoli Chu The Engineering Research Center of Intelligent Air-ground Integrated Vehicle and Traffic Control Ministry of EducationXihua UniversityChengdu610039China Chongqing Key Lab of Mobile Communications Technology Chongqing University of Posts and TelecommunicationsChongqing400065China James Watt School of Engineering University of GlasgowGlasgowG128QQUK Shaanxi Key Laboratory of Information Communication Network and Security Xi'an University of Posts and TelecommunicationsXi'an710121China Electronic and Electrical Engineering University of SheffieldSheffieldS102TNUK

Energy harvesting has been recognized as a promising technique with which to effectively reduce carbon emis-sions and electricity expenses of base stations.However,renewable energy is inherently stochastic and inter-mittent,imposing formidable challenges on reliably satisfying users'time-varying wireless traffic demands.In addition,the probability distribution of the renewable energy or users’wireless traffic demand is not always fully known in practice.In this paper,we minimize the total energy cost of a hybrid-energy-powered cellular network by jointly optimizing the energy sharing among base stations,the battery charging and discharging rates,and the energy purchased from the grid under the constraint of a limited battery size at each base station.In solving the formulated non-convex chance-constrained stochastic optimization problem,a new ambiguity set is built to characterize the uncertainties in the renewable energy and wireless traffic demands according to interval sets of the mean and covariance.Using this ambiguity set,the original optimization problem is transformed into a more tractable second-order cone programming problem by exploiting the distributionally robust optimization approach.Furthermore,a low-complexity distributionally robust chance-constrained energy management algo-rithm,which requires only interval sets of the mean and covariance of stochastic parameters,is proposed.The results of extensive simulation are presented to demonstrate that the proposed algorithm outperforms existing methods in terms of the computational complexity,energy cost,and reliability.

关键词： cellular networks Energy harvesting Energy management Chance-constrained Distributionally robust optimization

A Method for Deploying the Minimal Number of UAV Base Stations in cellular networks

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IEEE/CAA Journal of Automatica Sinica 2020年第2期7卷 559-567页

作者： Hailong Huang Chao Huang Dazhong Ma College of Information Science and Engineering Northeastern University

In this paper,we consider the scenario of using unmanned aerial vehicles base stations(UAV-BSs)to serve cellular users.In particular,we focus on frnding the minimum number of UAV-BSs as well as their deployment.We propose an optimization model which minimizes the number of UAV-BSs and optimize their positions such that the user equipment(UE)covered ratio is no less than the expectation of network suppliers,the UEs receive acceptable downlink rates,and the UAV-BSs can work in a sustainable manner.We show the NP-hardness of this problem and then propose a method to address it.The method first estimates the range of the number of UAV-BSs and then converts the original problem to one which maximizes the UE served ratio,given the number of UAV-BSs within that range.We present a maximizing algorithm to solve it with the proof of convergence.Extensive simulations based on a realistic dataset have been conducted to demonstrate the effectiveness of the proposed method.

关键词： Blanket coverage cellular networks coverage control proactive deployment unmanned aerial vehicles(UAV)

Orthogonal resource sharing scheme for device-to-device communication overlaying cellular networks: a cooperative relay based approach

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Science China(Information Sciences) 2015年第10期58卷 70-78页

作者： ZHANG GuoPeng LIU Peng YANG Kun DU Yao HU YanJun Internet of Things Research Center China University of Mining and Technology School of Computer Science and Electronic Engineering University of Essex School of Information and Electrical Engineering China University of Mining and Technology

In this paper, we propose a device-to-device(D2D) communication scheme to improve local services in cellular networks. By employing cooperative relay(CR) technology, D2 D and cellular communications can operate in orthogonal resource sharing(ORS) mode with the aim of optimizing the data rates for local D2 D users while fulfilling the minimum rate requirements for prioritized cellular users. In the proposed CR-based ORS scheme, we consider a cellular communication that is willing to share part of the occupied bandwidth resource with some D2 D communications. Hence, the newly-obtained resource can be used by a D2 D communication for the following two purposes, i.e., to compensate the rate loss of the cellular communication through cooperative relaying and to communicate its own information so as to increase its own rate. We formulated this CR-based ORS problem as a non-convex optimization problem. Hence, a global maximizer may not exist for the problem.To find the optimal solution for the problem, an effective heuristic algorithm is developed. Simulation results show that the proposed D2 D communication scheme can significantly increase the rates of local D2 D users and also fulfill the minimum rate requirements of cellular users.

关键词： cellular networks D2D communication cooperative relay orthogonal resource sharing overlay

5G green cellular networks considering power allocation schemes

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Science China(Information Sciences) 2016年第2期59卷 112-125页

作者： Xiaohu GE Jiaqi CHEN Cheng-Xiang WANG John THOMPSON Jing ZHANG School of Electronics Information and Communications Huazhong University of Science and Technology Joint Research Institute for Signal and Image Processing School of Engineering & Physical SciencesHeriot-Watt University

It is important to assess the effect of transmit power allocation schemes on the energy consumption on random cellular networks. The energy efficiency of 5G green cellular networks with average and water-filling power allocation schemes is studied in this paper. Based on the proposed interference and achievable rate model,an energy efficiency model is proposed for MIMO random cellular networks. Furthermore, the energy efficiency with average and water-filling power allocation schemes are presented, respectively. Numerical results indicate that the maximum limits of energy efficiency are always there for MIMO random cellular networks with different intensity ratios of mobile stations(MSs) to base stations(BSs) and channel conditions. Compared with the average power allocation scheme, the water-filling scheme is shown to improve the energy efficiency of MIMO random cellular networks when channel state information(CSI) is attainable for both transmitters and receivers.

关键词： energy efficiency cellular networks MIMO achievable rate model power allocation scheme

A Combining Call Admission Control and Power Control Scheme for D2D Communications Underlaying cellular networks

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China Communications 2016年第10期13卷 137-145页

作者： Xujie Li Wenna Zhang Honglang Zhang Wenfeng Li College of Computer and Information Engineering Hohai University Shanghai Key Laboratory of Intelligent Information Processing Fudan University Hubei Key Laboratory of Intelligent Wireless Communications South-Central University for Nationalities School of Electronic Science and Engineering Nanjing University

As device-to-device(D2D) communications usually reuses the resource of cellular networks, call admission control(CAC) and power control are crucial problems. However in most power control schemes, total data rates or throughput are regarded as optimization criterion. In this paper, a combining call admission control(CAC) and power control scheme under guaranteeing QoS of every user equipment(UE) is proposed. First, a simple CAC scheme is introduced. Then based on the CAC scheme, a combining call admission control and power control scheme is proposed. Next, the performance of the proposed scheme is evaluated. Finally, maximum DUE pair number and average transmitting power is calculated. Simulation results show that D2 D communications with the proposed combining call admission control and power control scheme can effectively improve the maximum DUE pair number under the premise of meeting necessary QoS.

关键词： device-to-device(D2D) call admission control power control cellular networks

Novel scheme for interference avoidance in cognitive radio based cellular networks

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The Journal of China Universities of Posts and Telecommunications 2012年第1期19卷 69-76页

作者： WANG Sai XU Xiao-dong CHEN Xin TAO Xiao-feng WANG Qiang Wireless Technology Innovation Institute Key Laboratory of Universal Wireless CommunicationMinistry of Education Beijing University of Posts and TelecommunicationsBeijing 100876China.

The cognitive radio （CR） technology is believed to improve the spectrum efficiency. However, the interference problem has become a critical issue due to the coexistence of primary systems and CR systems. In this paper, the interferences in CR based cellular networks are discussed. Interference scenarios are analyzed, considering different interference sources. Meanwhile, an improved model named ＇Cognitive Interference Ring＇ is introduced to describe the interference range of each secondary user （SU）. Depending on the above analysis, graph coloring based dynamic power allocation （GCDPA） scheme is proposed for interference avoidance. Simulation results demonstrate that in CR based cellular networks, the interferences to primary users （PUs） can be effectively mitigated with the proposed GCDPA scheme, and the system throughput and power efficiency are both improved.

关键词： CR interference analysis interference avoidance graph coloring power allocation cellular networks

Full Duplex Communications for Next Generation cellular networks:The Capacity Gain

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Journal of Shanghai Jiaotong university(Science) 2018年第1期23卷 11-19页

作者：唐爱民黄怀玉王旭东 University of Michigan-Shanghai Jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai 200240China

Full duplex communication highly improves spectrum efficiency of a wireless communication link.However, when it is applied to a cellular network, the capacity gain from this technology remains unknown. The reason is that full duplex communication changes the aggregate interference experienced by each communication link in cellular networks. In this paper, the capacity gain from full duplex communication is studied for cellular networks of 4G and beyond, where the same frequency channel is adopted in each cell. A two-layer Poisson point process(PPP) is adopted to model the network topology, and stochastic geometry is employed to derive the coverage probability and the average capacity of typical link in a cellular network. On the basis of these derived parameters, the capacity gain from full duplex communication is determined. Numerical results reveal that without mutual interference cancellation(MIC), the capacity gain is small under various power levels; with perfect MIC at base stations, the capacity gain can exceed 60%; with imperfect MIC at base stations, the capacity gain decreases quickly even with a slight drop of MIC performance.

关键词： full duplex communication cellular networks capacity gain mutual interference cancellation(MIC) stochastic geometry

Dynamic modeling of cellular response to DNA damage based on p53 stress response networks

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Progress in Natural Science:Materials International 2009年第10期19卷 1349-1356页

作者： Jinpeng Qi,Yongsheng Ding,Shihuang Shao College of Information Sciences and Technology,Donghua University,Shanghai 201620,China College of Information Sciences and Technology Donghua University Shanghai 201620 China.

Under acute perturbations from the outside,cells can trigger self-defensive mechanisms to fight against genome stress.To investigate the cellular response to continuous ion radiation(IR),a dynamic model for p53 stress response networks at the cellular level is proposed.The model can successfully be used to simulate the dynamic processes of double-strand breaks(DSBs) generation and their repair,switch-like ataxia telangiectasia mutated(ATM) activation,oscillations occurring in the p53-MDM2 feedback loop,as well as toxins elimination triggered by p53 stress response networks.Especially,the model can predict the plausible outcomes of cellular response under different IR dose regimes.

关键词： p53 DNA damage IR cellular networks Modelin

Effect of User Distribution on the Capacity of cellular networks

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Effect of User Distribution on the Capacity of Cellular Netw...