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2nd International Conference on Computer, Communication and Computational Sciences, IC4S 2017

作者： Cui, Hongyan Zhang, Bo Chen, Yuyang Yu, Tao Xia, Zongguo Liu, Yunjie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China Beijing Laboratory of Advanced Information Networks Beijing China Key Laboratory of Network System Architecture and Convergence Beijing China Institute of Network Science and Cyberspace Tsinghua University Tsinghua China School Official University of Massachusetts Boston Boston United States

ISBN: (纸本)9789811303432

Virtualization can provide significant benefits for service user by cutting the cost as well as enabling easy access. However, because the MAC table capacity of each host is limited, the traditional layer 2 networks have been unable to meet the needs of the numbers of virtual machines in the center. VXLAN has become an important layer 2 over layer 3 network transmission tunneling technology, a good solution to the data center internal virtual machine isolation and cross-data center transmission problems, but VXLAN does not propose a complete solution for virtual machine migration in the data center. Therefore, we design and implement the network model based on SDN, which optimizes the current VXLAN technology. This model separates the network plane from migration control plane, which can simplify the process of VXLAN and the complex network in data center. Moreover, we propose a detailed process for virtual machine migration supported by OpenFlow protocol. Some design in our model can really reduce the complexity of VXLAN technology and make it convenient for the users of virtual machine. © Springer Nature Singapore Pte Ltd. 2019.

关键词： Virtual machine

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Tight worst-case response-time analysis for ethernet AVB using eligible intervals

Tight worst-case response-time analysis for ethernet AVB usi...

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IEEE International Workshop on Factory Communication systems (WFCS)

作者： Jingyue Cao Pieter J. L. Cuijpers Reinder J. Bril Johan J. Lukkien System Architecture and Networking Eindhoven University of Technology

Busy period analysis is often used as a basis for worst-case response time analysis of priority based systems. However, when shaping strategies are used to prevent starvation of lower priorities, it becomes difficult to achieve tightness results using this method. The reason for this is that a busy period is defined as the longest interval in which there exists pending load. It is exclusively based on execution time, and does not take the amount of provided bandwidth into account. As a consequence, it is less suitable for the study of idling systems. In particular, we do not yet have tightness results regarding the analysis of the Ethernet AVB standard, in which credit-based shaping is applied. In this paper, we propose an alternative to the use of busy periods. We show that, by defining an eligible interval in such a way that provisioning is taken into account, tight worst-case response time bounds can more easily be obtained for Ethernet AVB, at least in the case of either lower-or higher-priority interference.

关键词： Bandwidth Standards Interference Switches Schedules Time factors Timing

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Resource scheduling virtualization in service-oriented future Internet architecture

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The Journal of China Universities of Posts and Telecommunications 2015年第4期22卷 92-100页

作者： Li Lan Chen Jianya Cui Hongyan Huang Tao Liu Yunjie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Service-oriented future internet architecture（SOFIA） is a clean-slate network architecture. In SOFIA, a service request is mainly processed through service resolution and network resource allocation. To realize the network resource allocation, we reference the idea of network virtualization and propose resource scheduling virtualization. In resource scheduling virtualization, a service request is abstracted as a virtual network（VN） and the network resources are allocated by mapping the VN onto the physical network. Resource scheduling virtualization provides centralized resource scheduling control within an autonomous system（AS） and achieves better controllability compared with the distributed schemes. Besides, resource scheduling virtualization supports multi-site selection as well. Meanwhile, we propose a collection of resource scheduling algorithms based on maximum resource tree（MRT） adapting to different scenarios. According to the simulation results, the proposed algorithms show good performance on the key metrics, such as acceptance ratio, revenue, cost and utilization. Moreover, the simulation results reveal that our algorithm is more efficient than the traditional ones.

关键词： SOFIA resource scheduling virtualization virtual network embedding maximum resource tree（MRT）

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The central office of the ICT Era: Agile, smart, and autonomous

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Ericsson Review (English Edition) 2016年第2期93卷 18-28页

作者： Kavak, Nail Wilkinson, Andrew Larkins, John Patil, Sunil Frazier, Bob System and Technology Group Development Unit IP United States IP networking Ericsson's Development Unit IP United States Ericsson's IP Design Unit San JoseCA United States Ericsson's Development Unit IP United States IP system architecture Ericsson's Business Unit Cloud and IP United States

Network architecture is undergoing a massive transformation, which in turn is having an impact on the role of the central office. Enabled primarily by virtualization and SDN technologies, network architectures are becoming more flexible, with improved programmability and a greater degree of automated behavior. In combination with technology enablers such as the increased reach offered by fiber, automation of provisioning and orchestration, and improvements in the performance of generic hardware, network transformation has provided operators with the opportunity to rationalize and consolidate infrastructure. The next generation central office will introduce intelligence and service agility into the network through disaggregation. © Copyright 2016 Wolters Kluwer Health, Inc. All rights reserved.

关键词： Network architecture

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Accurate Network Resource Allocation in SDN according to Traffic Demand

Accurate Network Resource Allocation in SDN according to Tra...

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2015 4th International Conference on Mechatronics,Materials,Chemistry and Computer Engineering(ICMMCCE 2015)

作者： Hongyan Cui Chenhang Ma Wei Lai Lili Zheng Yunjie Liu State Key Lab.of Networking and Switching Technology Beijing Key Lab.of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

The services carried by the Internet have undergone tremendous change over the past decades, along with the emergence of multimedia services and cloud computing, etc. However, there is little change in the framework of network designed primarily for reliable end-to-end communication, which is not suitable for these new services, resulting in poor performance of services and inefficient utilization of network resource. In this paper, we propose a network resource allocation scheme base on SDN(Software Defined Network) an emerging network paradigm, to provide Quality of Service(Qo S) support for various services while balance the link load in the network avoiding congestion and idleness. And we demonstrate its performance via experiments under our SDN test bed.

关键词： SDN Network Resource Allocation Quality of Service

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Mining Users’ Mobility Patterns Based On Apriori

Mining Users’ Mobility Patterns Based On Apriori

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2015 4th International Conference on Mechatronics,Materials,Chemistry and Computer Engineering(ICMMCCE 2015)

作者： Hongyan Cui Xiaolong Yin State Key Lab.of Networking and Switching Technology Beijing Key Lab.of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Mobility pattern of users is decided by people themselves. However, in the daily life, mobile users often repeat regular routes in certain periods. To effectively mine the mobile rules of users and allocate the resource among mobile telecommunication operators and Internet Service Providers（ISP）, grasping the models of human mobility can enable effective network planning and advertisement recommending. In this paper, we employ Apriori algorithm method to mine mobile users’ movement model. The algorithm proposed is based on mining the mobility patterns of users, forming mobility rules from these patterns, and finally predicting a mobile user’s next movement by using the mobility rules. The user mobility patterns are mined from the history of mobile user trajectories. In addition to the analysis of individual mobile behavior, it is possible to mine population movement regularity from a large number of user mobile patterns. By studying the group characteristics the place that a large number of users accessed can be found. Operators can optimize the setting of the base station according to the density of users to meet the needs of mobile users.

关键词： Mobility patterns Apriori Algorithm Trajectory prediction User behaviour analysis

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A real-time large-volume content delivery system using globally distributed storage

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Journal of the National Institute of Information and Communications Technology 2015年第2期62卷 101-111页

作者： Ogura, Tsuyoshi Kaneko, Kunitake Kitamura, Masahiko Kimiyama, Hiroyuki Fujii, Tatsuya Takahara, Atsushi Media Processing Systems Research Group Media Innovation Laboratory NTT Network Innovation Laboratories Japan Faculty of Science and Technology Keio University Application Oriented Networking Network Architecture Japan NTT Network Innovation Laboratories Network Virutalizations System Design Method Resillient System Japan

We are studying the method of developing a platform that delivers large-volume contents efficiently in a many-to-one transmission style, by combining network virtualization technology and the handling of LDGM error correction code. This paper describes its key technologies such as packet routing by using multiple virtual networks, data transmission using redundancy coding, and evaluation of communication qualities, and shows their current outcomes.

关键词： Error correction

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Interference of human's ankle to the channel characteristics of near surface WUSN

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The Journal of China Universities of Posts and Telecommunications 2014年第1期21卷 36-42页

作者： LI Li WU Wei CHEN Jian-ya LIU Yun-jie State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Because of its potential applications in agriculture, environment monitoring and so on, wireless underground sensor network（WUSN） has been researched more and more extensively in recent years. The main and most important difference of WUSN to terrestrial wireless sensor network（WSN） is the channel characteristics, which determines the design methodology of it. In this paper, the propagation character of electromagnetic（EM） wave in the near surface WUSN is analyzed, as well as the path loss model of it is given. In addition, the influence of human＇s ankle to the channel characteristics of near surface WUSN is investigated by electromagnetic theory analysis, simulation and experiment. A novel path loss model of near surface WUSN which takes the interference of human＇s ankle into consideration is proposed. It is verified that the existing of human above the WUSN system may cause additional attenuation to the signal of near surface WUSN which propagates as lateral wave along the ground. Moreover, the relation of the attenuation and operating frequency is deduced, which gives a reference to extend the frequency band applied in WUSN.

关键词： WUSN lateral wave human tissue path loss model EM wave attenuation

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Research on WiFi User Dwell Time Distribution

Research on WiFi User Dwell Time Distribution

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Symposia and Workshops on Ubiquitous, Autonomic and Trusted Computing, UIC-ATC

作者： Jie Meng Yihong Hu Guochu Shou Zhigang Guo Junfei Huang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Teleconnnunications Beijing China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Teleconnnunications Beijing China

ISBN: (纸本)9781467372121

In order to study the distribution law of human mobility time attribute and identify the individual identity according to the law, six months real data is collected in different scenarios through the Wireless-Data-Collection-Analysis-system developed by our laboratory. On the basis of AIC, we analyze the time distribution from the perspectives of wireless hotspot group users and individual users respectively. From the perspective of the group users, we verify that the users' daily cumulative dwell time meets the power-law distribution model. According to each user's average daily dwell time, we analyze the probability distribution of the average daily dwell time and conclude that it is consistent with the power-law with exponential cut off. From the angle of an individual user, we analyze the distribution of its daily dwell time in different time sections. The result shows that the daily dwell time probability distribution of the users who work on time is consistent with the multi-peak Gaussian distribution, and the moment of the highest peak point of different individuals are close. However, the distribution of the daily dwell time for those who do not need to work on time is related to the average daily dwell time. The shorter the average daily dwell time is, the better the distribution is in line with the long-tailed distribution.

关键词： Mobile communication Mathematical model Wireless communication Exponential distribution IEEE 802.11 Standard Mobile handsets Data models

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The Relation of Energy-Consumption and the Population of People

The Relation of Energy-Consumption and the Population of Peo...

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International Conference on Cyber-Enabled Distributed Computing and Knowledge Discovery, CyberC

作者： HongLiang Liang HongYan Cui Key Lab of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing P.R. China State Key Lab. Of Networking and Switching Technology MIT SENSEable City Laboratory

ISBN: (纸本)9781467392013

Reducing the energy consumption of cellular wireless access networks is not only beneficial for the global environment but also makes commercial sense for telecommunication operators, our research focus on how to put forward a constructive energy saving method in the precondition of guaranteed service quality for customer. In this paper, we based on the signaling data and location data coming from one of Chinese main operator's customers, trying to analysis the law that with the increase of users in a district, how their demand for energy change. Through the use of the law, operators can make a basis when conducting the construction of the base station at the time of city expansion and the redundancy phenomenon of construction of base station can be effectively reduced and then make contributions to energy saving, the law can also be used to provide a reference for city Planning Bureau when they conducting the urban planning and the construction of Green city and then get the purpose of optimal allocation of resources. In our study, we carry out the statistics of 1558053 users from Chongqing city, finally we found that with the increase of customer' number of each special district, the number of total traffic in the city present a change of power function.

关键词： Base stations Business Mathematical model Cities and towns Correlation Internet Urban planning

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