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arXiv 2018年

作者： Liu, Juan Wang, Xijun Bai, Bo Dai, Huaiyu College of Electrical Engineering and Computer Science Ningbo University Zhejiang315211 China State Key Laboratory of Integrated Service Networks Institute of Information Science Xidian University Xi'an Shaanxi710071 China Future Network Theory Lab 2012 Labs Huawei Technologies Co. Ltd. Shatin N. T. Hong Kong Department of Electrical and Computer Engineering North Carolina State University United States

Unmanned aerial vehicle (UAV)-aided data collection is a new and promising application in many practical scenarios. In this work, we study the age-optimal trajectory planning problem in UAV-enabled wireless sensor networks, where a UAV is dispatched to collect data from the ground sensor nodes (SNs). The age of information (AoI) collected from each SN is characterized by the data uploading time and the time elapsed since the UAV leaves this SN. We attempt to design two age-optimal trajectories, referred to as the Max-AoI-optimal and Ave-AoI-optimal trajectories, respectively. The Max-AoI-optimal trajectory planning is to minimize the age of the 'oldest' sensed information among the SNs. The Ave-AoI-optimal trajectory planning is to minimize the average AoI of all the SNs. Then, we show that each age-optimal flight trajectory corresponds to a shortest Hamiltonian path in the wireless sensor network where the distance between any two SNs represents the amount of inter-visit time. The dynamic programming (DP) method and genetic algorithm (GA) are adopted to find the two different age-optimal trajectories. Simulation results validate the effectiveness of the proposed methods, and show how the UAV's trajectory is affected by the two AoI metrics. Copyright © 2018, The Authors. All rights reserved.

关键词： Sensor nodes

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Hybrid precoding architecture for massive multiuser MIMO with dissipation: Sub-connected or fully-connected structures?

arXiv

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arXiv 2018年

作者： Du, Jingbo Xu, Wei Shen, Hong Dong, Xiaodai Zhao, Chunming National Mobile Communications Research Laboratory Southeast University Nanjing210096 China State Key Lab of Integrated Services Networks Xidian University Xi'an710126 China Department of Electrical and Computer Engineering University of Victoria VictoriaBCV8W 3P6 Canada

In this paper, we study the hybrid precoding structures over limited feedback channels for massive multiuser multiple-input multiple-output (MIMO) systems. We focus on the system performance of hybrid precoding under a more realistic hardware network model, particularly, with inevitable dissipation. The effect of quantized analog and digital precoding is characterized. We investigate the spectral efficiencies of two typical hybrid precoding structures, i.e., the sub-connected structure and the fullyconnected structure. It is revealed that increasing signal power can compensate the performance loss incurred by quantized analog precoding. In addition, by capturing the nature of the effective channels for hybrid processing, we employ a channel correlation-based codebook and demonstrate that the codebook shows a great advantage over the conventional random vector quantization (RVQ) codebook. It is also discovered that, if the channel correlation-based codebook is utilized, the sub-connected structure always outperforms the fully-connected structure in either massive MIMO or low signal-to-noise ratio (SNR) scenarios;otherwise, the fully-connected structrue achieves better performance. Simulation results under both Rayleigh fading channels and millimeter wave (mmWave) channels verify the conclusions above. Copyright © 2018, The Authors. All rights reserved.

关键词： Feedback control

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Joint power allocation and splitting (JoPAS) for SWIPT in doubly selective vehicular channels

Joint power allocation and splitting (JoPAS) for SWIPT in do...

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作者： Wang, Dexin Zhang, Rongqing Cheng, Xiang Quan, Zhi Yang, Liuqing Department of Electrical and Computer Engineering Colorado State University Fort CollinsCO80523 United States State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Engineering and Computing Sciences Peking University Beijing100871 China College of Information Engineering Shenzhen University Shenzhen518060 China

In recent years, the capacity and charging speed of batteries have become the bottleneck of mobile communications systems. With the development of wireless power transfer technologies, simultaneous wireless information and power transfer (SWIPT) emerges as a potential solution for green communications. Due to hardware limitations, the energy harvesting circuit cannot decode the signal directly. Power splitting is a popular and effective solution to this problem. Consequently, the problem of optimal power splitting at the receiver arises in addition to the conventional problem of power allocation in communications systems. SWIPT in vehicular networks is a promising technology that helps extend the lifetime of sensors installed on vehicles and roadside units. However, existing SWIPT schemes fail to consider the doubly selective characteristics of vehicular channels. In this paper, joint power allocation and splitting for SWIPT over such channels is proposed with the objective of maximizing the achievable data rate with constraints on the delivered energy. Simulations show significantly improved performance compared with the existing dynamic power splitting scheme. A suboptimal algorithm, named decoupled power allocation and splitting, is also proposed with significantly reduced computational complexity and simulations demonstrate its near-optimum performance. © 2017 IEEE.

关键词： Energy harvesting

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Low Complexity Automatic Modulation Classification Based on Order-Statistics

Low Complexity Automatic Modulation Classification Based on ...

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作者： Han, Lubing Gao, Feifei Li, Zan Dobre, Octavia A. State Key Laboratory of Intelligent Technologies and Systems Tsinghua National Laboratory for Information Science and Technology Tsinghua University Beijing100084 China State Key Laboratory of Integrated Service Networks School of Telecommunications Engineering Xidian University Xi'an710071 China Department of Electrical and Computer Engineering Memorial University St. John'sNLA1B3X9 Canada

In this paper, we propose three automatic modulation classification classifiers based on order-statistics and reduced order-statistics, where the order-statistics are the random variables sorted by ascending order and the reduced order-statistics represent a subset of the original order-statistics. Specifically, the linear support vector machine classifier applies the linear combination of the order-statistics of the received signals, while the approximate maximum likelihood and the backpropagation neural networks (BPNNs) classifier resort to the reduced order-statistics to decrease the computational complexity. Moreover, BPNN is applicable for modulation classification both in known and unknown channel scenarios. It is shown that in the known channel scenario, the proposed classifiers provide a good tradeoff between performance and computational complexity, while in the unknown channel scenario, the proposed BPNN classifier outperforms the expectation maximization classifier in terms of both classification performance and computational complexity. Simulations results are provided to evaluate the proposed classifiers. © 2016 IEEE.

关键词： Computational complexity

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Towards SDN Based Queuing Delay Estimation

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China Communications 2016年第3期13卷 27-36页

作者： MA Haiyan YAN Jinyao Panagiotis Georgopoulos Bernhard Plattner Faculty of Science and Technology Communication University of China Computer Engineering and Networks Laboratory Swiss Federal Institute of Technology Zurich (ETH Zurich)

As one of Qo S(Quality of Service) metrics, delay is critical important to delay sensitive applications, such as interactive video, network game and online surgery. In this paper, we exploit SDN(Software Defined Networking) advantages to solve delay Qo S problem. Our work mainly focuses on SDN based queuing delay estimation with real traffic and end-to-end delay control. First, we propose a queuing estimation model and extended it for end-to-end delay of the whole path. It is proved to be feasible and accurate with experimental results in SDN environment. Second, in order to demonstrate the use of our proposed model, we also implement an end-to-end delay control application in SDN. It fulfills specific delay Qo S requirements by dynamically switching flows to a suitable queue based on estimation results and delay requirements.

关键词： autonomic Qo S dynamic model delay performance SDN

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Terabit optical OFDM superchannel transmission via coherent carriers of a hybrid chip-scale soliton frequency comb

arXiv

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arXiv 2018年

作者： Geng, Yong Huang, Xiatao Cui, Wenwen Ling, Yun Xu, Bo Zhang, Jin Yi, Xingwen Wu, Baojian Huang, Shu-Wei Qiu, Kun Wong, Chee Wei Zhou, Heng Key Lab of Optical Fiber Sensing and Communication Networks School of Information and Communication Engineering University of Electronic Science and Technology of China Chengdu611731 China Department of Electrical Computer and Energy Engineering University of Colorado BoulderCO80309 United States Fang Lu Mesoscopic Optics and Quantum Electronics Laboratory University of California Los AngelesCA90095 United States

We demonstrate seamless channel multiplexing and high bitrate superchannel transmission of coherent optical orthogonal-frequency-division-multiplexing (CO-OFDM) data signals utilizing a dissipative Kerr soliton (DKS) frequency comb generated in an on-chip microcavity. Aided by comb line multiplication through Nyquist pulse modulation, the high stability and mutual coherence among mode-locked Kerr comb lines are exploited for the first time to eliminate the guard intervals between communication channels and achieve full spectral density bandwidth utilization. Spectral efficiency as high as 2.625 bit/Hz/s is obtained for 180 CO-OFDM bands encoded with 12.75 Gbaud 8-QAM data, adding up to total bitrate of 6.885 Tb/s within 2.295 THz frequency comb bandwidth. Our study confirms that high coherence is the key superiority of Kerr soliton frequency combs over independent laser diodes, as a multi-spectral coherent laser source for high-bandwidth high-spectral-density transmission networks. Copyright © 2018, The Authors. All rights reserved.

关键词： Spectral density

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Secure Two-Party Distance Computation Protocol Based on Privacy Homomorphism and Scalar Product in Wireless Sensor networks

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Tsinghua Science and Technology 2016年第4期21卷 385-396页

作者： Haiping Huang Tianhe Gong Ping Chen Reza Malekian Tao Chen Nanjing University of Posts and Telecommunications Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Department of Electrical Electronic and Computer EngineeringUniversity of Pretoria

Numerous privacy-preserving issues have emerged along with the fast development of the Internet of Things. In addressing privacy protection problems in Wireless Sensor networks （WSN）, secure multi-party computation is considered vital, where obtaining the Euclidian distance between two nodes with no disclosure of either side＇s secrets has become the focus of location-privacy-related applications. This paper proposes a novel Privacy-Preserving Scalar Product Protocol （PPSPP） for wireless sensor networks. Based on PPSPP, we then propose a Homomorphic-Encryption-based Euclidean Distance Protocol （HEEDP） without third parties. This protocol can achieve secure distance computation between two sensor nodes. Correctness proofs of PPSPP and HEEDP are provided, followed by security validation and analysis. Performance evaluations via comparisons among similar protocols demonstrate that HEEDP is superior; it is most efficient in terms of both communication and computation on a wide range of data types, especially in wireless sensor networks.

关键词： secure two-party computation privacy-preserving wireless sensor networks scalar product distancecalculation privacy homomorphism

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Wireless powered asynchronous backscatter networks with sporadic short packets: Performance analysis and optimization

arXiv

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arXiv 2018年

作者： Yang, Qian Wang, Hui-Ming Zheng, Tong-Xing Han, Zhu Lee, Ho School of Electronic and Information Engineering Xi’an Jiaotong University Xi’an710049 China Ministry of Education Key Laboratory for Intelligent Networks and Network Security Xi’an Jiaotong University Xi’an710049 China University of Houston HoustonTX77004 United States Department of Computer Science and Engineering Kyung Hee University Seoul Korea Republic of Division of Electronics Engineering Chonbuk National University Jeonju561-756 Korea Republic of

—In the fifth generation era, the pervasive applications of Internet of Things and massive machine-type communications have initiated increasing research interests on the backscatter wireless powered communication (B-WPC) technique due to its ultra high energy efficiency and low cost. The ubiquitous B-WPC network is characterized by nodes with dynamic spatial positions and sporadic short packets, of which the performance has not been fully investigated. In this paper, we give a comprehensive analysis of a multi-antenna B-WPC network with sporadic short packets under a stochastic geometry framework. By exploiting a time-space Poisson point process model, the behavior of the network is well captured in a decentralized and asynchronous transmission way. We then analyze the energy and information outage performance in the energy harvest and backscatter modulation phases of the backscatter network, respectively. The optimal transmission slot length and division are obtained by maximizing the network-wide spatial throughput. Moreover, we find an interesting result that there exists the optimal tradeoff between the durations of the energy harvest and backscatter modulation phases for spatial throughput maximization. Numerical results are demonstrated to verify our analytical findings and show that this tradeoff region gets shrunk when the outage constraints become more stringent. Copyright © 2018, The Authors. All rights reserved.

关键词： Geometry

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Glucose Screening Measurements and Noninvasive Glucose Monitor Methods

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Procedia computer Science 2018年 139卷 613-621页

作者： Hui Zheng Jing He Peng Li Mengjiao Guo Hui Jin Jie Shen Zhijun Xie Chihung Chi School of Software and Electrical Engineering Swinburne University of Technology Melbourne Australia School of Computer Science Nanjing University of Posts and Telecommunications Nanjing China North China Institute of Aerospace Engineering Hebei China College of Information Engineering Nanjing University of Finance and Economics China Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Jiangsu Province Nanjing China Endocrinology Department Zhongda Hospital Southeast University Nanjing Jiangsu China Endocrinology Department The Third Affiliated Hospital of Southern Medical University Guangzhou Guangdong China Faculty of Electrical Engineering and Computer Science Ningbo University Ningbo Zhejiang Province China Commonwealth Scientific and Industrial Research Organisation (CSIRO) Tasmania Australia

Diabetes alone does not affect the health, but its complications always bring danger to people’s health. To avoid the development of diabetes and posterior to discover diabetes, checking blood glucose level is an effective way. The development of glucose screening measurements is introduced. Non-invasive glucose monitor methods, as accurate, safe, convenient and comfortable methods, are also illustrated and compared in this paper. Also, an Intelligent dynamic health inspection is designed with a proposed non-invasion glucose monitor measurement.

关键词： diabetes blood glucose screening noninvasive methods

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IM-DD MDM-WDM transmission over 120-km weakly-conpled FMF enabled by wavelength interleaving

IM-DD MDM-WDM transmission over 120-km weakly-conpled FMF en...

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2017 Optical Fiber Communications Conference and Exhibition, OFC 2017

作者： Tian, Yu Li, Juhao Wu, Zhongying Zhu, Paikun Chen, Yuanxiang Mo, Qi Ren, Fang Li, Zhengbin He, Yongqi Chen, Zhangyuan State Key Laboratory of Advanced Optical Communication Systems and Networks Peking University Beijing100871 China Wuhan Research Institute of Posts and Telecommunications Wuhan430074 China School of Computer and Communication Engineering Universitat of Science and Technology Beijing Beijing100083 China

Wavelength-interleaved (WI) scheme is proposed to mitigate modal crosstalk during weakly-coupled few-mode fiber (FMF) transmission based on which 2×3×10-Gb/s IM-DD MDM-WDM transmission over 120-km 2-mode FMF... 详细信息

ISBN: (纸本)9781943580231

关键词： Optical fibers

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