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International Workshop on Quality of Service

作者： Wubin Pan Gaung Cheng Hua Wu Yongning Tang School of Computer Science and Engineering Southeast University China Ministry of Education Key Laboratory of Computer Network and Information Integration China School of Information Technology Illinois State University USA

Video streaming has become one of the most prevalent mobile applications, and takes a huge portion of the traffic on mobile networks today. YouTube is one of the most popular and volume-dominant video content providers. Understanding the user perception on the quality (i.e., Quality of Experience or QoE) of YouTube video streaming services is thus paramount for the content provider as well as its content delivery network (CDN) providers. Although various video QoE assessment approaches proposed to use different key Performance Indicators (KPIs), they are all essentially related to a common parameter: Bitrate. However, after YouTube adopted HTTPS as its adaptive video streaming method to better protect user privacy and network security, bitrate cannot be obtained anymore from encrypted video traffic via typical deep packet inspection (DPI) method. In this paper, we tackle this challenge by proposing a machine learning based bitrate estimation (MBE) approach to parse bitrate information from IP packet level measurement. For evaluating the effectiveness of MBE, we have chosen video Mean Opinion Score (vMOS) proposed by a leading telecom vendor, as the QoE assessment framework, and have conducted comprehensive experiments to study the impact of bitrate estimation accuracy on its KPIs for HTTPS YouTube video streaming service. Experimental results show that MBE is a feasible and highly effective approach to obtain in real time the bitrate information from encrypted video streaming traffic.

关键词： Streaming media YouTube Bit rate Servers Cryptography Adaptive systems Mobile communication

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Low-dose CBCT reconstruction via 3D dictionary learning

Low-dose CBCT reconstruction via 3D dictionary learning

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IEEE International Symposium on Biomedical Imaging

作者： Jin Liu Yang Chen Yining Hu Limin Luo Ministry of Education The Key Laboratory of Computer Network and Information Integration (Southeast University) China Centre de Rechercheen Information Biomedicale Sino-Francais (LIA CRIBs) Rennes France

ISBN: (纸本)9781479923519

Dictionary based regularization has shown its potential to improve the low-dose computed tomography (CT) imaging quality. In this paper, we developed a 3D dictionary learning (3D-DL) regularization approach for low-dose cone-beam computed tomography (CBCT) reconstruction. A 3D dictionary learned from standard-dose CT volumes database is used to build the prior term, and an alternating minimization scheme is developed to minimize the objective function. The reconstructed image and its sparse representation are updated alternately in the iterative process. We evaluated the performance of the proposed method using both low-dose and sparse-view CBCT datasets. Qualitative and quantitative results show that the proposed method can lead to a promising improvement of reconstruction quality.

关键词： Image reconstruction Dictionaries Computed tomography Three-dimensional displays Minimization Linear programming X-ray imaging

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Analysis of web traffic based on HTTP protocol

Analysis of web traffic based on HTTP protocol

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International Conference on Software, Telecommunications and computer networks (SoftCOM)

作者： Jiajia Chen Weiqing Cheng School of Computer Science & Technology Nanjing University of Posts and Telecommunications Nanjing China Ministry of Education Key Laboratory of Computer Network and Information Integration (Southeast University) Nanjing China

ISBN: (纸本)9781509025787

With the development of Internet, new applications are emerging in an endless stream, and traditional applications are constantly changing. Over the past decade, Internet applications develop rapidly, and great changes have taken place in application traffic characteristics of ordinary hosts and servers. Analyzing Internet application traffic characteristics is meaningful to understanding today's network applications, traffic classification, application optimization, network planning and so on. This paper first studies the current composition of Web traffic on the Internet based on analyzing HTTP (Hypertext Transfer Protocol) messages. Instead of page response time, it analyzes types of Web servers and measures Web server response time to speculate the development of Web servers.

关键词： Web servers Time factors HTML Protocols Optimization

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Path selection and algorithm optimization of wireless sensor networks based on sink mobile distance-constraint

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Journal of Computational and Theoretical Nanoscience 2016年第8期13卷 5156-5164页

作者： Wang, Honglin Shen, Jun School of Computer Science and Engineering Southeast University Jiangsu Nanjing211189 China Key Laboratory of Computer Network and Information Integration Southeast University Jiangsu Nanjing211189 China School of Electronic and Information Engineering of Nanjing University of Information Science and Technology Jiangsu Nanjing210044 China

In this paper, the authors have discussed the problem of longest network lifetime in the wireless sensor networks on the condition of limited sink moving distance. The optimal solution of integer linear programming model is obtained by using the energy limitation of nodes, the distance between the base stations and the model energy loss. The mobile sink path and the network lifetime can be directly obtained by the using the model. However, the execution time of the integer linear programming model increases tremendously if number of nodes is more than 25. Therefore, the authors have decomposed the optimal solution into three steps. The first step is to solve the residence time of each node by using the linear programming model without considering the moving distance. The second step is to limit the longest residence time of the base station to each node in the mobile range. The final step is to gradually increase the optimal path of the nodes until the energy of the node becomes 0. The simulation results have demonstrated that the running time of the optimized scheme is greatly reduced, but the overall lifetime of the network is slightly lower. © Copyright 2016 American Scientific Publishers All rights reserved.

关键词： Base stations

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Micro-Expression Recognition based on 2D Gabor Filter and Sparse Representation

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Journal of Physics: Conference Series 2017年第1期787卷

作者： Hao Zheng Key Laboratory of Trusted Cloud Computing and Big Data Analysis School of Information Engineering Nanjing XiaoZhuang University Nanjing China MOE Key Laboratory of Computer Network and Information Integration School of Computer Science and Engineering Southeast University Nanjing China State Key Laboratory for Novel Software Technology Nanjing University Nanjing China

Micro-expression recognition is always a challenging problem for its quick facial expression. This paper proposed a novel method named 2D Gabor filter and Sparse Representation (2DGSR) to deal with the recognition of micro-expression. In our method, 2D Gabor filter is used for enhancing the robustness of the variations due to increasing the discrimination power. While the sparse representation is applied to deal with the subtlety, and cast recognition as a sparse approximation problem. We compare our method to other popular methods in three spontaneous micro-expression recognition databases. The results show that our method has more excellent performance than other methods.

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Clustering algorithm design optimization and routing protocols based on leach

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Journal of Computational information Systems 2015年第12期11卷 4343-4352页

作者： Wang, Honglin Shen, Jun School of Computer Science and Engineering of Southeast University Nanjing China Key Laboratory of Computer Network and Information Integration of Southeast University Nanjing China School of Electronic & Information Engineering of Nanjing University of Information Science & Technology Nanjing China

Special long-distance communication environment, the standard protocol is optimized for Leach mine tunnel, an improved protocol TLeach base on Leach. Including: optimized clustering scheme, we propose a clustering method of determining the number of optimization;and the cluster head directly communicate with the base station is adjusted to the cluster head by routing forwards the data to the base station;Cluster head to the base station using the routing depth or breadth-first search algorithm to form, in order to find the shortest path from the source node to the base station node in order to Reduce network energy consumption and prolong the survival time of the network. Experimental results show that the optimized protocol has better stability, significantly extending the lifetime of the network. ©, 2015, Binary information Press. All right reserved.

关键词： Base stations

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Efficient anonymous category-level joint Tag estimation

Efficient anonymous category-level joint Tag estimation

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International Conference on network Protocols

作者： Min Chen Jia Liu Shigang Chen Qingjun Xiao Department of Computer & Information Science & Engineering University of Florida Gainesville FL USA State Key Laboratory for Novel Software Technology Nanjing University P.R. China Key Laboratory of Computer Network & Information Integration Southeast University P.R. China

ISBN: (纸本)9781509032822

Radio-frequency identification (RFID) technologies have been widely used in many applications, including inventory management, supply chain, product tracking, transportation, logistics, etc. Tag estimation, which is to estimate the cardinality of a single tag set, is an important research topic. This paper expands the estimation research as follows: It performs joint estimation between two tag sets (which exist at different locations or at the same location but different times). More importantly the estimation is fine-grained in an effort to accommodate common practical scenarios, where each tag set consists of tags belonging to different categories. For any two given tag sets, we want to know the detailed information about the joint property of each category, instead of just the aggregate information of the whole sets. Furthermore, due to the open nature of RFID communications, it is often desirable that tag estimation can be performed in an anonymous way without revealing the tags' ID information. To support these requirements, we develop a new technique called mask bitmap that can encode a tag set without requiring the tags to report their IDs or category IDs. Any two mask bitmaps of different tag sets can be combined to perform category-level joint estimation. Through formal analysis, we determine how to set system parameters to meet a given accuracy requirement that can be arbitrarily set. Extensive simulation results confirm that the proposed solution can yield accurate category-level estimates in an efficient way, and preserve tags' anonymity as well.

关键词： Estimation Radiofrequency identification Protocols Conferences Aggregates Simulation Servers

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ESync: Energy synchronized mobile charging in rechargeable wireless sensor networks

ESync: Energy synchronized mobile charging in rechargeable w...

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作者： Fu, Lingkun He, Liang Cheng, Peng Gu, Yu Pan, Jianping Chen, Jiming State Key Laboratory of Industrial Control Technology Zhejiang University Hangzhou310027 China University of Michigan Ann ArborMI48109 United States Key Laboratory of Computer Network and Information Integration Southeast University Ministry of Education Beijing100044 China Watson Health Cloud IBM Watson Health CambridgeMA02142 United States Department of Computer Science University of Victoria VictoriaBCV8P 5C2 Canada

Recent years have witnessed many new promising technologies to power wireless sensor networks, which motivate some fundamental topics to be revisited. Different from energy harvesting, which generates dynamic energy supply, the mobile charger is able to provide a stable and reliable energy supply for sensor nodes and, thus, enables sustainable system operations. While previous mobile charging protocols focus on either the charger travel distance or the charging delay of sensor nodes, in this work, we propose a novel energy synchronized mobile charging (ESync) protocol, which simultaneously reduces both of them. Observing the limitation of traveling salesman problem (TSP)-based solutions, when the nodes' energy consumption is diverse, we construct a set of nested TSP tours based on their energy consumption, and only nodes with low remaining energy are involved in each charging round. Furthermore, we propose the concept of energy synchronization to synchronize the charging request sequence of nodes with their sequence on the TSP tours. Experimentation and simulation demonstrate that ESync can reduce charger travel distance and nodes' charging delay by about 30% and 40%, respectively. © 2015 IEEE.

关键词： Sensor nodes

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Non-uniform spacing clustering interval multi-hop routing leach algorithms for wireless sensor network

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Journal of Computational information Systems 2015年第10期11卷 3613-3622页

作者： Wang, Honglin Shen, Jun School of computer Science and Engineering of Southeast University Nanjing China Key Laboratory of Computer Network and Information Integration of Southeast University Nanjing China School of Electronic & Information Engineering of Nanjing University of Information Science & Technology Nanjing China

For mine tunnel distances ribbon special communications environment, proposed a non-uniform spacing clustering multi-hop routing algorithm. The core idea is: to change the cluster head election strategy, considering the position of the node, energy and networks, such as the number of current network cluster heads forming weighting function, optimize partitions, away from the base station to partition larger than the nearby district comprehensive node energy consumption;the original single-hop communication mode optimized for single-hop and multi-hop mixed-mode, single-hop and multi-hop network choices to lower the overall energy consumption of the standard;in order to protect the communication mode of the multi-hop cluster heads near the base station using the multi-hop mode interval, so that a larger area of nodes sharing a base station adjacent to a node energy consumption. Experiments show that the protocol has better stability and significantly extend the life cycle of the network. ©, 2015, Binary information Press. All right reserved.

关键词： Base stations

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A data routing algorithm based on Markov model in underwater wireless sensor networks

A data routing algorithm based on Markov model in underwater...

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IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Dongwei Li JingLi Du LinFeng Liu Jiangsu High Technology Research Key Laboratory for Wireless Sensor Networks Nanjing China School of Computer Science and Technology Nanjing University of Posts and Telecommunications Nanjing China Laboratory of Computer Network and Information Integration (Southeast University) Nanjing China

ISBN: (纸本)9781509013180

The underwater wireless sensor networks (UWSNs) composed of sensor nodes is deployed underwater for submarine data collection, underwater monitoring, disaster warning, navigation assistance and so on. Since the underwater environment is usually unpredictable, and the nodes move or be damaged easily, so there are several vital objectives in UWSN routing such as the delivery success rate, the error rate and the energy consumption. To this end, we propose a data routing algorithm based on Markov model, which logically transforms the underwater three-dimensional (3D) deployment model into a two-dimensional (2D) model, and thus the nodes are considered to be hierarchically deployed. The data routing is achieved through bottom-top forwarding. In this forwarding mode, the delivery success rate can be improved and the energy consumption can be reduced due to the more stable routing, less forwarding counts and better adaptability to the dynamic load.

关键词： Energy consumption Data models Routing Solid modeling Markov processes Two dimensional displays Wireless sensor networks

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