检索结果-内蒙古大学图书馆

International Conference on Computer Science & Education (ICCSE)

作者： Bonan Wang Qianqian Wang Guochu Shou Yihong Hu Zhigang Guo Beijing Key Lab.of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781509022199

With the rapid development of mobile Internet, the way users access the network becomes diverse, which provide much convenience for us to collect huge amount of users' information. In this paper, we present a model of measuring relationship between two users in campus and build a wireless data analysis system called WiCloud to verify our model. This work has several potential applications such as recommendation, advertisement targeting, and privacy protection. A novel method using decision tree model, which is usually used for decision analysis, is proposed to measure the relationship between two users in wireless network. Experiments results on real datasets validate our ideas and verify the feasibility and efficiency. Experimental results show that the accuracy of the training set is 100%, while the accuracy of the test set is 88.9%.

关键词： Decision trees IEEE 802.11 Standard Trajectory Mobile communication Wireless communication Hidden Markov models Entropy

来源：评论

学校读者我要写书评

暂无评论

Echo state transfer learning for data correlation aware resource allocation in wireless virtual reality

arXiv

引用

arXiv 2017年

作者： Chen, Mingzhe Saad, Walid Yin, Changchuan Debbah, Mérouane Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing100876 China Wireless-VT Bradley Department of Electrical and Computer Engineering Virginia Tech BlacksburgVA United States Mathematical and Algorithmic Sciences Lab Huawei France R & D Paris France

In this paper, the problem of data correlation-aware resource management is studied for a network of wireless virtual reality (VR) users communicating over cloud-based small cell networks (SCNs). In the studied model, small base stations (SBSs) with limited computational resources act as VR control centers that collect the tracking information from VR users over the cellular uplink and send them to the VR users over the downlink. In such a setting, VR users may send or request correlated or similar data (panoramic images and tracking data). This potential spatial data correlation can be factored into the resource allocation problem to reduce the traffic load in both uplink and downlink. This VR resource allocation problem is formulated as a noncooperative game that allows jointly optimizing the computational and spectrum resources, while being cognizant of the data correlation. To solve this game, a transfer learning algorithm based on the machine learning framework of echo state networks (ESNs) is proposed. Unlike conventional reinforcement learning algorithms that must be executed each time the environment changes, the proposed algorithm can intelligently transfer information on the learned utility, across time, to rapidly adapt to environmental dynamics due to factors such as changes in the users' content or data correlation. Simulation results show that the proposed algorithm achieves up to 16.7% and 18.2% gains in terms of delay compared to the Q-learning with data correlation and Q-learning without data correlation. The results also show that the proposed algorithm has a faster convergence time than Q-learning and can guarantee low delays. Copyright © 2017, The Authors. All rights reserved.

关键词： Virtual reality

来源：评论

学校读者我要写书评

暂无评论

Oscillation resolution for massive cell phone traffic data 1

Oscillation resolution for massive cell phone traffic data

引用

1st Workshop on Mobile Data, MobiData 2016, co-located with MobiSys 2016

作者： Qi, Ling Qiao, Yuanyuan Abdesslem, Fehmi Ben Ma, Zhanyu Yang, Jie Center for Data Science Beijing Key Laboratory of Network System Architecture and Convergence Beijing Laboratory of Advanced Information Network BUPT Beijing China Decisions Networks and Analytics Laboratory SICS Stockholm Sweden Center for Data Science Pattern Recognition and Intelligent System Lab BUPT Beijing China

ISBN: (纸本)9781450343275

Cellular towers capture logs of mobile subscribers whenever their devices connect to the network. When the logs show data traffic at a cell tower generated by a device, it reveals that this device is close to the tower. The logs can then be used to trace the locations of mobile subscribers for different applications, such as studying customer behaviour, improving location-based services, or helping urban planning. However, the logs often suffer from an oscillation phenomenon. Oscillations may happen when a device, even when not moving, does not only connect to the nearest cell tower, but is instead unpredictably switching between multiple cell towers because of random noise, load balancing, or simply dynamic changes in signal strength. Detecting and removing oscillations are a challenge when analyzing location data collected from the cellular network. In this paper, we propose an algorithm called SOL (Stable, Oscillation, Leap periods) aimed at discovering and reducing oscillations in the collected logs. We apply our algorithm on real datasets which contain about 18.9 TB of traffic logs generated by more than 3 million mobile subscribers covering about 21000 cell towers and collected during 27 days from both GSM and UMTS networks in northern China. Experimental results demonstrate the ability and effectiveness of SOL to reduce oscillations in cellular network logs. © 2016 ACM.

关键词： Location based services

来源：评论

学校读者我要写书评

暂无评论

Software Defined Multi-OLT Passive Optical network For Flexible Traffic Allocation

Software Defined Multi-OLT Passive Optical Network For Flexi...

引用

International Symposium on Optoelectronic Technology and Application 2016(OTA 2016)——Conf.15 Optical Communication and Optical network

作者： SHIZONG Zhang RENTAO Gu YUEFENG Ji JIAWEI Zhang HUI Li Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication EngineeringBeijing University of Posts and Telecommunications State Key Lab of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

With the rapid growth of 4G mobile network and vehicular network services,mobile terminal users have increasing demand on data sharing among different radio remote units(RRUs) and roadside units(RSUs)

ISBN: (纸本)9781510607743

关键词： Passive optical network Software defined networking Bandwidth optimization Passive optical networks access network wavelengths Traffic core network control surfaces Building construction architecture bandwidth on demand Bandwidth

来源：评论

学校读者我要写书评

暂无评论

Mining Users’ Mobility Patterns Based On Apriori

Mining Users’ Mobility Patterns Based On Apriori

引用

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

来源：评论

学校读者我要写书评

暂无评论

Accurate network Resource Allocation in SDN according to Traffic Demand

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

WiFi band-stop FSS for increased privacy protection in smart building 6

WiFi band-stop FSS for increased privacy protection in smart...

引用

6th IEEE International Symposium on Microwave, Antenna, Propagation, and EMC Technologies, MAPE 2015

作者： Xiong, Xiong Hong, Weijun Zhao, Zhentao Li, Deng Li, Shufang College of Electronic and Information Engineering South China University of Technology Guangzhou China Beijing Key Lab. of Network System Architecture and Convergence Beijing Univ. of Posts and Telecommunications Beijing China

ISBN: (纸本)9781467374415

This paper proposes a periodic double ring strip frequency selective surface (FSS) with dual-band stop behavior. The FSS elements are designed to be etched on the transparent coating of glass substrate in smart buildings, which acts as a dual-band notch filter on 2.45GHz and 5.4GHz to avoid the leakage of WiFi signal outside the building. All the simulation parts are simulated by using High Frequency Structure Simulator (HFSS). The proposed FSS possesses 450MHz and 960MHz bandwidth with insertion loss more than -10dB around the two central operating frequencies 2.45GHz and 5.45GHz, respectively. Furthermore, the unit-cell structure provides a stable performance for both TE and TM polarizations with incident angles 0°-60 °. A prototype of the proposed FSS is fabricated and measured. Good agreement between the simulated and measured results is obtained. © 2015 IEEE.

关键词： Frequency selective surfaces

来源：评论

学校读者我要写书评

暂无评论

A recyclable platform-tolerant RFID tag antenna with cross-plane loop-fed

A recyclable platform-tolerant RFID tag antenna with cross-p...

引用

International RF and Microwave Conference, RFM

作者： Weijun Hong Yang Fu Qing Chen Li Deng Xiong Xiong Beijing Key Lab. of Network System Architecture and Convergence Beijing Univ. of Posts and Telecommunications Beijing China

ISBN: (纸本)9781467381710

To avoid performance fluctuation of radio frequency identification (RFID) system while the tag is attached on objects with different materials, a platform-tolerant UHF RFID tag antenna with stable high gain is proposed in this paper. The antenna is composed of an upper layer feeding loop and a lower layer planar dipole. Inductively coupling approach is adopted to feed, so that large mutual inductance could be introduced into the incident impedance of antenna, which enables great match between RFID chip and antenna. The coupling feeding method can also significantly decrease the impact on antenna impedance due to the introduced parallel capacity between radiation plane and platform. The realized results show that the antenna has an impedance bandwidth (S112 plate of aluminum, paper, copper, glass and air to be the platform, during these experiments the antenna gain varies less than 1dB. Compared with other cavity backed antenna or AMC, EBG based antenna, the antenna proposed in this paper has higher gain with an extremely simple structure which performs significant advantage for mass production.

关键词： Dipole antennas Impedance Antenna feeds RFID tags UHF antennas

来源：评论

学校读者我要写书评

暂无评论

Anomaly Detection for User Behavior in Wireless network Based on Cross Entropy

Anomaly Detection for User Behavior in Wireless Network Base...

引用

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

作者： Chunxiao Zhang Yihong Hu Xinning Zhu Zhigang Guo Junfei Huang Beijing Key Lab. of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China State Key Lab. of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781467372121

Wi-Fi technology is becoming more and more popular and anomaly detection for user behavior is much required in many fields such as public security, therefore anomaly detection for offline user behavior based on Wi-Fi is attracting many researchers' attention. There are already some researches in anomaly detection focusing on single user behavior, while the distribution of group user behaviors is considered in this paper. A novel method using cross entropy model which is usually used for networking attacking in computer network is proposed to detect anomalies of offline user behavior in wireless network. Moreover, to make the anomaly detection available in different scenes, cross entropy model is optimized by using membership function of fuzzy mathematic. Experiments conducted in campus, hotel and office satisfy the expected results, which verify the feasibility and efficiency. And the result retrieved from optimized model is better than that of original model.

关键词： Entropy Hidden Markov models Mathematical model Analytical models Mobile communication IEEE 802.11 Standard Computational modeling

来源：评论

学校读者我要写书评

暂无评论

WiFi Band-Stop FSS for Increased Privacy Protection in Smart Building

WiFi Band-Stop FSS for Increased Privacy Protection in Smart...

引用

The 6th International Symposium on Microwave,Antenna,Propagation,and Electromagnetic Compatibility Technologies(MAPE 2015)

作者： Xiong Xiong Weijun Hong Zhentao Zhao Li Deng Shufang Li College of Electronic and Information Engineering South China University of Technology Beijing Key Lab. of Network System Architecture and Convergence Beijing Univ. of Posts and Telecommunications

This paper proposes a periodic double ring strip frequency selective surface（FSS） with dual-band stop behavior. The FSS elements are designed to be etched on the transparent coating of glass substrate in smart buildings, which acts as a dualband notch filter on 2.45 GHz and 5.4GHz to avoid the leakage of WiF i signal outside the building. All the simulation parts are simulated by using High Frequency Structure Simulator（HFSS）. The proposed FSS possesses 450 MHz and 960 MHz bandwidth with insertion loss more than-10 dB around the two central operating frequencies 2.45 GHz and 5.45 GHz, respectively. Furthermore, the unit-cell structure provides a stable performance for both TE and TM polarizations with incident angles 0-60. A prototype of the proposed FSS is fabricated and measured. Good agreement between the simulated and measured results is obtained.

关键词： frequency selective surface dual-band polarization stability wireless local area network

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：