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Mobile Edge Computing: Progress and Challenges

Mobile Edge Computing: Progress and Challenges

引用

IEEE International Conference on Mobile Cloud Computing, Services, and Engineering (MobileCloud)

作者： Hongxing Li Guochu Shou Yihong Hu Zhigang Guo Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

Mobile Edge Computing (MEC) provides mobile and cloud computing capabilities within the access network, and aims to unite the telco and IT at the mobile network edge. This paper presents an investigation on the progress of MEC, and proposes a platform, named WiCloud, to provide edge networking, proximate computing and data acquisition for innovative services. Furthermore, the open challenges that must be addressed before the commercial deployment of MEC are discussed.

关键词： Mobile communication Cloud computing Mobile computing Servers Wireless communication Smart phones Wireless sensor networks

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A cross-polarization discrimination compensation algorithm based on polarization modulation for the power amplifier energy efficiency improvement

A cross-polarization discrimination compensation algorithm b...

引用

International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Jinjin Yuan Fangfang Liu Caili Guo Chunyan Feng Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781509053773

In the dual-polarized channel, the power amplifier (PA) energy efficiency is decreased by cross-polarization discrimination (XPD) effect which introduces cross power leakage and then reduces the BER performance of polarization modulation (PM). Therefore, an XPD compensation algorithm based on PM for the PA energy efficiency improvement is proposed. Firstly, the effect of energy efficiency caused by XPD is derived. Then the compensation factor is employed to compensate for the state of polarization (SOP) of the received signals based on channel state information (CSI) estimation. Moreover, the effect of the energy efficiency caused by the channel estimation error is analyzed. Finally, theoretical analyses and simulation results show that the XPD compensation algorithm can improve the PA energy efficiency effectively.

关键词： Channel estimation Algorithm design and analysis Wireless communication Nonlinear distortion Channel state information Energy consumption Receivers

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CONNECTIVITY FOR OVERLAID WIRELESS networkS WITH OUTAGE CONSTRAINTS

CONNECTIVITY FOR OVERLAID WIRELESS NETWORKS WITH OUTAGE CONS...

引用

IEEE International Conference on Acoustics, Speech and Signal Processing

作者： Yang Liu Chengzhi Li Changchuan Yin Huaiyu Dai Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China 100876

ISBN: (纸本)9781479999897

We study the connectivity of overlaid wireless networks where two users can communicate if the signal-to-interference ratio is larger than a threshold subject to an outage constraint. By using percolation theory, we first specify a 2-dimensional connectivity region defined as the set of density pairs--the density of secondary users and the density of primary users--within which the secondary network is percolated. Several interesting properties of this region are also revealed. Our work provides a new perspective for better understanding of the connectivity of large-scale overlaid networks.

关键词： CONNECTIVITY density pairs primary users

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Improving mobility prediction performance with state based prediction method when the user departs from routine

Improving mobility prediction performance with state based p...

引用

IEEE International Conference on Big Data Analysis (ICBDA)

作者： Airui Li Qiujian Lv Yuanyuan Qiao Jie Yang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications (BUPT) Beijing China

ISBN: (纸本)9781467395922

With the rapid increase of the mobile users, mobility prediction has attracted more and more attention. For the moment, a lot of location prediction methods have shown that humans are highly predictable in their movements. However, the method of predicting locations when the user's behavior unexpectedly transits from routine to irregular pattern is undiscovered. In this paper, we propose a practical model based on State Based Prediction (SBP) method to predict the place to be visited when the user departs from the routine. First, we predict the routine level of user locations to discover the irregular places. Second, we use Markov method to predict future locations. Then, when user departs from the routine, we use SBP method to conduct prediction, meanwhile the prediction results of the other places remain consistent with the output of the Markov predictor. Experiments with the real mobile dataset show that our prediction model outperforms other basic mobility predictors, for example, the accuracy of our method can reach more than 83%, which is higher than the accuracy of 60% achieved by Lempel-Ziv (LZ) predictor.

关键词： Trajectory Markov processes Predictive models Mobile communication Entropy Mobile computing systems architecture

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Remote Video Interception system Implemented on USRP

Remote Video Interception System Implemented on USRP

引用

IEEE International Conference on Internet of Things

作者： Yuan Zhou Li Deng Weijun Hong Chen Zhang Shufang Li Zhen Wang Beijing Key Laboratory of Network System Architecture and Convergence Beijing Laboratory of Advanced Information Network Beijing University of Posts and Telecommunications Beijing China 100876

ISBN: (纸本)9781509058815

With the development of the technology, life is filled with increasing information equipment. When they work, a great deal of information will be radiated. For the leaked information, an interception system is built with USRP (Universal Software Radio Peripheral), and the line synchronization signal was extracted with a method called cepstrum. Compared with the method of autocorrelation, the new method is more conducive to find the interval between the neighboring peaks. And the system has more obvious advantages compared to the traditional system composed of AD (Analog-Digital) and DSP (Digital Signal Process) devices. It is small in size, inexpensive, reconfigurable, and it is convenient to operate. The results of experiments indicate that 16 fonts can be reconstructed clearly. It fully reflects its superior performance.

关键词： TEMPEST USRP information leakage line synchronization signal

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Detecting Malicious Domains by Massive DNS Traffic Data Analysis

Detecting Malicious Domains by Massive DNS Traffic Data Anal...

引用

International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC

作者： Shiqi Tian Cheng Fang Jun Liu Zhenming Lei Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications HAOHAN Data Technology Co. LTD. Beijing China

ISBN: (纸本)9781509007691

DNS (Domain name system) is one of the most prevalent protocols on modern networks and is essential for the correct operation of many network activities including the malicious operation. Monitoring the DNS traffic is an effective method to detect malicious activities. In this paper, we proposed an approach to detect malicious domains by analyzing massive mobile web traffic data. We used multiple features to classify, including the textual features and the traffic statistics features of domains and presented three typical classifiers to compare the classifying effect of each. Spark framework is leveraged to speed up the calculation of a large-scale DNS traffic. The efficiency of our system makes us believe the approach can help a lot in the field of network security.

关键词： Feature extraction Support vector machines Sparks Computational modeling IP networks Internet Monitoring

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A fast handoff scheme for ieee 802.11 networks using software defined networking

A fast handoff scheme for ieee 802.11 networks using softwar...

引用

International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Biao Zhang Xiangming Wen Zhaoming Lu Tao Lei Xiaoguang Zhao Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China Beijing Laboratory of Advanced Information Network Beijing China

ISBN: (纸本)9781509053773

Due to the limited coverage range of access points (APs) and the mobility of stations (STAs), handoff occurs frequently in IEEE 802.11 wireless local area network (WLAN). However, traditional handoff mechanisms employed at STAs have inherent defects which make it hard to realize seamless handoff, it is a challenging issue for supporting seamless handoff service in WLAN. Extensions to Software Defined networking (SDN) framework for WLAN could provide new solutions to address this issue. In this paper, we propose a pre-scan based fast handoff scheme for SDN based WLAN system. The proposed scheme can help STA obtain the best alternative AP in advance after the pre-scan process, and when the handoff is actually triggered, STA can perform the authentication and reassociation process toward the alternative AP directly. Moreover, we adopt Kalman filter to minimize the fluctuation of received signal strength (RSS), thus reducing the unnecessary pre-scan processes and handoffs. Simulation results show that the proposed scheme can effectively reduce the handoff delay.

关键词： Wireless LAN Delays Probes Switches IEEE 802.11 Standard Authentication Wireless communication

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ANALYSIS OF MOBILE SUBSCRIBERS' BEHAVIOR PATTERN BASED ON NON-NEGATIVE MATRIX FACTORIZATION

ANALYSIS OF MOBILE SUBSCRIBERS' BEHAVIOR PATTERN BASED ON NO...

引用

2016 5th IEEE International Conference on network Infrastructure and Digital Content(IC-NIDC 2016)

作者： Han Deng Yonggang Qi Jun Liu Jie Yang Beijing Key Laboratory of Network System Architecture and Convergence Center for Data Science Beijing University of Posts and Telecommunications

As the increasing number of intelligent mobile phones that are available for people which lead to tones of network flow data are ***,how to dig the user's behavior pattern by using the data collected form mobile phones is a significant *** some achievements have been made in this area,it is still too complicated to be put into practice due to various conditions needed by traditional research ***,users' data of mobile communication network gradually improved,so that it only requires part of information to reach the ideal ***,we propose a Non-negative Matrix Factorization based method to analyze the mobility patterns of mobile phone users,i.e.,find the groups of people with the similar mobility *** experimental results on the real data obtained from the capital of a south province validate our proposed method.

关键词： Non-negative matrix factorization Community detection

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Research and Implementation of Resource Scheduling Mechanisms Based on Software Defined Security

Research and Implementation of Resource Scheduling Mechanism...

引用

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

作者： Zelang Wang Guochu Shou Yihong Hu Zhigang Guo Beijing Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781509051557

Compared with the traditional stiff and decentralized security mechanisms, software-defined security SDS provides a flexible and centralized solution through extract security strategy from the hardware to the software. A variety of software-defined security architecture has been proposed, basically like SDN three layer, let the control layer separate from the data layer. Now, however, these software-defined security architectures proposed and implemented in the SDS ignored resource scheduling mechanism which can schedule security resources effectively and flexibility. This paper presents a resource scheduling mechanism in software-defined security, and a scheduling algorithm to achieve load balancing. Experiments show that the applied resource scheduling mechanism in our SDS architecture can work well in scheduling scanners in Physical Layer, and achieve the target of load balancing of scanners, can provide users with more flexible security services.

关键词： Security Computer architecture Physical layer Scheduling algorithms Job shop scheduling Software

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A Cross-Polarization Discrimination Compensation Algorithm for Polarization Modulation

A Cross-Polarization Discrimination Compensation Algorithm f...

引用

IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communications

作者： Jinjin Yuan Fangfang Liu Caili Guo Chunyan Feng Yao Nie Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications

ISBN: (纸本)9781509032556

In dual-polarized channel, the BER performance of polarization modulation (PM) can be decreased by cross-polarization discrimination (XPD) effect which can introduce cross power leakage. Therefore, a XPD compensation algorithm for PM is proposed. Based on the analyses about the effect of XPD on PM, the compensation factor is obtained by the channel state information. Then by compensating the state of polarization of the received signals, the cross power leakage between two orthogonal components of the states of polarization is mitigated, and the constellation distortion of PM is reduced. The analyses reveal that the compensation algorithm can effectively improve the BER performance of PM affected by XPD. Finally, simulation results show that when the XPD is a definite value, to achieve equivalent BER performance of 2PM, the SNR needed is 2.5dB reduction after compensation.

关键词： Cross-polarization discrimination (XPD) Polarization modulation (PM) BER Compensation algorithm Dual-polarized channel

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