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A multi-dimensional hierarchical performance evaluation model for edge cloud platform

Procedia Computer Science 2018年 129卷 389-393页

作者： Yue Zhao Xin Feng Na Chen Yaoguang Wang Yijun Yu Hongbo Wang State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China MBB Research Department Huawei Technology Co. Ltd. Shanghai 200127 China

Edge computing is a new trend in the development of Internet of things, which can integrate network, computing, storage and applications to provide intelligent services. It has a broad development prospects, but also brings a lot of new problems. The performance evaluation of edge cloud platform is a crucial aspect. Existing cloud platform performance evaluation research is mostly aimed at one aspect of performance so it needs more in-depth research and improvement. In this paper, we propose a new multi-dimensional hierarchical performance evaluation model. We first study the application scenarios of the edge cloud platform and select key performance indicators. Then, we divide indicators into five categories: capacity, performance, reliability, agility and equilibrium, each category is classified to three levels. Finally, we use Analytic Hierarchy Process(AHP) method to calculate the whole performance score to evaluate edge cloud platform.

关键词： Edge Cloud Platform Performance Evaluation Multi-dimensional Hierarchical Model Analytic Hierarchy Process

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Construction and Practice of Cloud-based Experiment and Innovation Project Supporting Platform for Computer Science Education

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计算机教育 2018年第12期 13-21页

作者： Peng Xu Hui Cai Jian Kuang Xiaoyan Zhang State Key Lab of Networking and Switching Technology Beijing University of Posts and TelecommunicationsBeijing 100876China Science and Technology on Communication Networks Laboratory Shijiazhuang 050081China School of Software Beijing University of Posts and TelecommunicationsBeijing 100876China

Higher and more requirements on experiments and innovation projects of computer science courses is brought forward to promote the "Double First Class". For these requirements, the cloud-based experiment and innovation project supporting platform is introduced in this paper. On the one hand, the platform could satisfy the diversified resource requirements of both teachers and students in course experiments and innovation projects. On the other hand, the feature of "construct once and access anywhere" could achieve higher resource utilization rate and lower costs than the traditional "lab-based" experiment mode. The supporting platform has been applied to practice and gains a lot of positive feedbacks.

关键词： experiment innovation project cloud computing course computing science

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Load balancing for ultra-dense networks: A deep reinforcement learning based approach

arXiv

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arXiv 2019年

作者： Xu, Yue Xu, Wenjun Wang, Zhi Lin, Jiaru Cui, Shuguang Key Lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing100876 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Shenzhen Research Institute of Big Data School of Science and Engineering Chinese University of Hong Kong Shenzhen518172 China Department of Electrical and Computer Engineering University of California DavisCA95616 United States

—In this paper, we propose a deep reinforcement learning (DRL) based mobility load balancing (MLB) algorithm along with a two-layer architecture to solve the large-scale load balancing problem for ultra-dense networks (UDNs). Our contribution is three-fold. First, this work proposes a two-layer architecture to solve the large-scale load balancing problem in a self-organized manner. The proposed architecture can alleviate the global traffic variations by dynamically grouping small cells into self-organized clusters according to their historical loads, and further adapt to local traffic variations through intra-cluster load balancing afterwards. Second, for the intra-cluster load balancing, this paper proposes an off-policy DRL-based MLB algorithm to autonomously learn the optimal MLB policy under an asynchronous parallel learning framework, without any prior knowledge assumed over the underlying UDN environments. Moreover, the algorithm enables joint exploration with multiple behavior policies, such that the traditional MLB methods can be used to guide the learning process thereby improving the learning efficiency and stability. Third, this work proposes an offline-evaluation based safeguard mechanism to ensure that the online system can always operate with the optimal and well-trained MLB policy, which not only stabilizes the online performance but also enables the exploration beyond current policies to make full use of machine learning in a safe way. Empirical results verify that the proposed framework outperforms the existing MLB methods in general UDN environments featured with irregular network topologies, coupled interferences, and random user movements, in terms of the load balancing performance. Copyright © 2019, The Authors. All rights reserved.

关键词： Deep learning

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Mobile big data analysis with machine learning

arXiv

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arXiv 2018年

作者： Xie, Jiyang Song, Zeyu Li, Yupeng Ma, Zhanyu Pattern Recognition and Intelligent Systems Lab. Beijing University of Posts and Telecommunications Beijing China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

This paper investigates to identify the requirement and the development of machine learning-based mobile big data analysis through discussing the insights of challenges in the mobile big data (MBD). Furthermore, it reviews the state-of-the-art applications of data analysis in the area of MBD. Firstly, we introduce the development of MBD. Secondly, the frequently adopted methods of data analysis are reviewed. Three typical applications of MBD analysis, namely wireless channel modeling, human online and offline behavior analysis, and speech recognition in the internet of vehicles, are introduced respectively. Finally, we summarize the main challenges and future development directions of mobile big data analysis. Copyright © 2018, The Authors. All rights reserved.

关键词： Big data

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DGBA: Delay-Guaranteed Bitrate Adaptation for Mobile Broadcaster in Interactive Live Video Streaming

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Journal of Physics: Conference Series 2019年第2期1176卷

作者： Minglong Dai Chuming Li Xirong Que Yong Cui State key Lab of Networking and Switching Beijing University of Posts and Telecommunications Beijing China Department of Computer Science and Technology Tsinghua University Beijing China

Improving the broadcaster-side performance is crucial for ensuring the video quality experience (QoE) for mobile interactive live streaming. But it is challenging in the presence of mobile network's bandwidth fluctuation, as we need not only to ensure a high video bitrate but also to meet the broadcaster-side constraint. This paper presents Delay-Guaranteed Bitrate Adaptation (DGBA), an algorithm based on the idea of controllable bitrate adaptation used to optimize the broadcaster-side performance. We compare the performance of DGBA with a commercial bitrate adaptation algorithm by implementing these two algorithms in a prototype system. The experiment results show that DGBA can ensure 95.2% broadcaster-side delay constraint satisfaction compared to commercial algorithm's 84.7%, while being more effective in bitrate adaptation.

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Game Theoretic Modeling of Interaction Problems in Datacenter Network Environments

Game Theoretic Modeling of Interaction Problems in Datacente...

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IEEE Symposium on Computers and Communications

作者： Jun Gong Jianxin Liao Zilu Kang Information Science Academy (ISA) China Electronics Technology Group Corporation (CETC) Beijing China State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications (BUPT) Beijing China

Cloud services have been widely deployed on large-scale datacenters by Cloud Service Providers (CSPs) to provide users with better performance and reliability. However, interactions between datacenter selection and multiple traffic engineering (TE) of many physical networks operated by Internet Service Providers (ISPs) may occur, which may lead to performance loss. In this paper, we propose a cooperative approach based on Nash's bargaining solution (NBS) for CSP and ISPs to improve their performance, which considers both Pareto optimality and fairness. Then, in order to facilitate the actual deployment, we also design a decomposition algorithm to calculate the NBS. Simulations are performed to verify our analysis on different network environments.

关键词： Datacenter Traffic engineering Nash's bargaining solution Decomposition algorithm

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Propagation Characteristics in Indoor Scenario with Different Transmitter Locations at 3.5 and 6 GHz 1st

Propagation Characteristics in Indoor Scenario with Differen...

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1st International Conference on 5G for Future Wireless Networks, 5GWN 2017

作者： Zhang, Xinzhuang Yu, Yawei Tian, Lei Han, Yu Zhang, Yu Zhang, Jianhua Key Lab of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Mailbox NO. 92 Beijing100876 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO. 92 Beijing100876 China Qualcomm Inc. 6/F Tower C Beijing Global Trade Center 36 North 3rd Ring East Road Beijing100013 China

ISBN: (纸本)9783319728223

This paper presents results from the measurement in indoor conference scenario at 3.5 GHz and 6 GHz. The measurement was performed by using multiple-input multiple-output (MIMO) antennas including uniform planar array (UPA) at transmitter end (Tx) and omni-directional array (ODA) at receiver end (Rx). Two cases including UPA on the wall and the ceiling, have been measured and comprehensive propagation characteristics have been investigated in detail. Based on the measurement, delay and spatial parameters are analyzed and then compared with the standard model. The delay spread measured shows smaller value than standard model due to the small size of the scenario and the elevation angle spread is presented for establishing three-dimensional (3D) channel model. Further, the capacity performances of the channel in different cases are evaluated, and the results indicate that the system with transmitter antenna mounted on the wall performs better. © 2018, ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering.

关键词： Transmitters

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Comparison on Channel Characteristics at 3.5 GHz and 28 GHz

Comparison on Channel Characteristics at 3.5 GHz and 28 GHz

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European Conference on Antennas and Propagation

作者： Zhongyuan Wu Jianhua Zhang Lei Tian Zhixue Hu Tao Jiang Wei Li Key Lab of Universal Wireless Communications Ministry of Education State Key Lab of Networking and Switching Technology Beijing University of Posts and Telecommunications Mailbox NO.92 100876 Beijing China Department of Electrical Engineering Northern Illinois University DeKalb IL 60115

ISBN: (纸本)9781785618154;9781785618161

In this paper, the channel measurements at 28 GHz and 3.5 GHz were conducted in the same indoor shopping mall scenario for the purpose of comparing the channel propagation characteristics between millimeter wave and centimeter wave. In the measurement of 28 GHz, a high gain steerable horn antenna is rotated with the step of 5 degrees in azimuth to synthesize the omnidirectional array for collecting the angular information at receiver (Rx) while a sector antenna at transmitter (Tx). And the data at 3.5 GHz is collected by a MIMO measurement equipment of an omnidirectional array (ODA) at Rx with an uniform array (UPA) at Tx. Based on the data and channel estimation algorithm space-alternating generalized expectation-maximization (SAGE), Power Angular Spectrum (PAS) and Root Mean Square (RMS) Angular Spread of Azimuth of arrive (ASA) are calculated. After that, the PAS at each measured spot are compared and analyzed. Meanwhile, the relationship between RMS ASA and distance in the Line of sight (LoS) are observed at 3.5 GHz and 28 GHz. Finally, the fitted distributions and parameters of the RMS ASA at 3.5 GHz and 28 GHz are compared with the Model-A proposed in ITU IMT-2020 channel model, which the results in NLoS are both closer to the standard parameters than LoS at 3.5 GHz and 28 Ghz.

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Souya: An open extensible search service to build rich-content applications 11

Souya: An open extensible search service to build rich-conte...

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11th International Conference on Ubiquitous Information Management and Communication, IMCOM 2017

作者： Xu, Peng Zhao, Xueyuan State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications BUPT Xitucheng road 10 Haidian District Beijing100876 China

ISBN: (纸本)9781450348881

The rapid development of Internet brings more challenges for application providers not only on applications, but also on the development of applications. Rich-content applications have become the hottest applications in Internet and mobile Internet. In this paper, we propose a new open extensible search service SOUYA to simplify the development of rich-content applications. It provides flexible interfaces to access data. What the application developers have to deal with is just the implementation of frontend pages. The advantage of SOUYA lies in that it could increase the development efficiency. © 2017 ACM.

关键词： Cloud Open APIs Rich-content Search service

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Spin image of an atomic vapor cell with a resolution smaller than the diffusion crosstalk free distance

arXiv

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arXiv 2019年

作者： Dong, Hai-Feng Chen, Jing-Ling Li, Ji-Min Li, Chen Li, Ai-Xian Zhao, Nan Guo, Fen-Zhuo School of Instrumentation and Optoelectronic Engineering Beihang University Beijing100083 China Quantum Sensing and Information Sensing Lab Graduate School of China Academy of Engineering Physics Beijing100193 China Quantum Physics and Quantum Information Division Beijing Computational Science Research Center Beijing100193 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China School of Science Beijing University of Posts and Telecommunication Beijing100876 China

The diffusion crosstalk free distance is an important parameter for spin images in atomic vapor cells and is also regarded as a limit on the spatial resolution. However, by modulating the pumping light both spatially and temporally using a digital micromirror device, a spin image of a vapor cell has been obtained with a distinguishable stripe width of 13.7 μm, which is much smaller than the corresponding diffusion crosstalk free distance of ∼138 μm. The fundamental limit on the spatial resolution as determined by diffusion and the uncertainty principle is analyzed. Copyright © 2019, The Authors. All rights reserved.

关键词： Crosstalk

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