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AN ACTIVE QUEUE MANAGEMENT ADAPTATION FRAMEWORK FOR SOFTWARE DEFINED OPTICAL network

AN ACTIVE QUEUE MANAGEMENT ADAPTATION FRAMEWORK FOR SOFTWARE...

The 13th International Conference on Optical Communications and networks, ICOCN 2014(2014第13届光通信与网络国际会议)

作者： Zhaozhi Ge Rentao Gu Yuefeng Ji Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and TelecommunicationsNo.10 Xi Tu Cheng Road100876BeijingP. R. China

Software Defined Optical network(SDON)is gaining more and more adaptability,as flexible optical transceivers make it possible to control the switching characteristics in the physical *** upper layer,openness is also being considered,an open framework to dynamically adapt Transmission Control Protocol(TCP)has already been ***,openness in queue management,which plays a key role in Optical Packet Switching and has direct impact on link congestion and latency,is seldom *** paper addresses the need for adaptively control Active Queue Management(AQM)in SDON and proposes an AQM adaptation framework called *** describe the framework and give proof of concept by NS2 *** results show that major improvement in queuing delay and decreasing jitter is achieved under OpenAQM.

关键词： SDON AQM adaptation framework

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Optimal allocation of feedback bits for 3D MIMO systems

Optimal allocation of feedback bits for 3D MIMO systems

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International Symposium on Wireless Personal Multimedia Communications (WPMC)

作者： Lu Yu Tiankui Zhang Chunyan Feng Qin Niu Gen Cao Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China Research Department China Information Technology Designing & Consulting Institute Co. Ltd Beijing China

ISBN: (纸本)9781479964123

In this paper, the optimal feedback bits allocation scheme between horizontal channel quantization and vertical channel quantization is proposed in three-dimensional (3D) multiple-input multiple-output (MIMO) systems with limited feedback. The proposed scheme aims to allocate more bits to quantize the channel dimension with stronger gains. The feedback bits allocation is studied by comparing the gains of horizontal channel and vertical channel. The optimization model is built in the form of minimizing the differences between limited feedback and ideal feedback under the condition of fixed bits. The optimum result of feedback bits allocation is obtained by strict derivations. The system level simulation results show that the 3D MIMO systems with optimal bit allocation can achieve higher spectral efficiency than equal bit allocation, the accuracy of which is then verified by the theoretical analysis.

关键词： Receiving antennas MIMO Interference Three-dimensional displays Signal to noise ratio Vectors Quantization (signal)

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No-reference video quality assessment via feature learning

No-reference video quality assessment via feature learning

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IEEE International Conference on Image Processing

作者： Jingtao Xu Peng Ye Yong Liu David Doermann Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications China Language and Media Processing Laboratory University of Maryland College Park USA SONY US Research Center USA

ISBN: (纸本)9781479957521

In this paper, we propose a novel “Opinion Free” (OF) No-Reference Video Quality Assessment (NR-VQA) algorithm based on frame-level unsupervised feature learning and hysteresis temporal pooling. The system consists of three components: feature extraction with max-min pooling, frame quality prediction and temporal pooling. Frame level features are first extracted by unsupervised feature learning and used to train a linear Support Vector Regressor (SVR) for predicting quality scores frame by frame. Frame-level quality scores are then combined by temporal pooling to obtain a single video quality score. We tested the proposed method on the LIVE video quality database and experimental results show that without training on human opinion scores the proposed method is comparable to state-of-the-art NR-VQA algorithms.

关键词： Quality assessment Video recording Training Nonlinear distortion Feature extraction Hysteresis

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Analysis of prediction performance in wavelet minimum complexity echo state network

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The Journal of China Universities of Posts and Telecommunications 2013年第4期20卷 59-66页

作者： CUI Hong-yan FENG Chen LIU Yun-jie Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications School of Information and Communication Engineering Beijing University of Posts and Telecommunications

Echo state network （ESN） has become one of the most popular recurrent neural networks （RNN） for its good prediction performance of non-linear time series and simple training process. But several problems still prevent ESN from becoming a widely used tool. The most prominent problem is its high complexity with lots of random parameters. Aiming at this problem, a minimum complexity ESN model （MCESN） was proposed. In this paper, we proposed a new wavelet minimum complexity ESN model （WMCESN） to improve the prediction accuracy and increase the practical applicability. Our new model inherits the characters of minimum complexity ESN model using the fixed parameters and simple circle topology. We injected wavelet neurons to replace the original neurons in internal reservoir and designed a wavelet parameter matrix to reduce the computing time. By using different datasets, our new model performed better than the minimum complexity ESN model with normal neurons, but only utilized tiny time cost. We also used our own packets of transmission control protocol （TCP） and user datagram protocol （UDP） dataset to prove that our model can deal with the data packet bit prediction problem well.

关键词： wavelet minimum complexity echo state network echo state network wavelet parameter matrix practical applicability

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Offline traffic analysis system based on Hadoop

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The Journal of China Universities of Posts and Telecommunications 2013年第5期20卷 97-103页

作者： QIAO Yuan-yuan LEI Zhen-ming YUAN Lun GUO Min-jie Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Produce Ads Amazon Joyo Co. Ltd

Offiine network traffic analysis is very important for an in-depth study upon the understanding of network conditions and characteristics, such as user behavior and abnormal traffic. With the rapid growth of the amount of information on the Intemet, the traditional stand-alone analysis tools face great challenges in storage capacity and computing efficiency, but which is the advantages for Hadoop cluster. In this paper, we designed an offiine traffic analysis system based on Hadoop （OTASH）, and proposed a MapReduce-based algorithm for TopN user statistics. In addition, we studied the computing performance and failure tolerance in OTASH. From the experiments we drew the conclusion that OTASH is suitable for handling large amounts of flow data, and are competent to calculate in the case of single node failure.

关键词： MapReduce Hadoop cloud computing traffic analysis

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A cache-active routing mechanism in content-centric networking

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Journal of Computational Information systems 2013年第23期9卷 9653-9660页

作者： Hu, Qian Wu, Muqing Guo, Song Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

Content-Centric networking (CCN) has shown possibilities to solve several problems of the Internet. Communications in CCN are based on contents instead of IP. Existing routing mechanisms in CCN are inefficient on the utilization of caching contents in every CCN node, for cached contents in CCN nodes cannot be announced actively. This paper proposes a Cache-Active Routing (CAR) mechanism to maximize the usage of cached contents. Caching nodes announce their locations by flooding and attract content requests to the nearest caching nodes if the original content is far. The simulation results show that CAR could reduce the average network delay and overhead. Copyright © 2013 Binary Information Press.

关键词： network routing

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Joint Relay Selection and Spectrum Allocation Scheme in Cooperative Relay networks

Joint Relay Selection and Spectrum Allocation Scheme in Coop...

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IEEE Conference on Vehicular Technology (VTC)

作者： Tiankui Zhang Jinlong Cao Zhimin Zeng Dantong Liu Beijing University of Posts and Telecommunications Beijing China Beijing Key Laboratory of Network System Architecture and Convergence Beijing China China Telecom Corporation Limited Beijing China Queen Mary University of London London United Kingdom

ISBN: (纸本)9781479944811

Joint relay selection and spectrum allocation scheme with multiple source-destination pairs and multiple potential relays in cooperative relay networks is proposed in this paper. In cooperative relay networks, the selected relay nodes and spectrum resource allocated to each source-destination pair have great impact on the system performance. It is an optimization problem for which relay nodes are selected and which spectrum resources are assigned. The exhaustive search can solve this problem but the complexity will increase factorially with the network size (i.e., the number of source-destination pairs and the number of relays in the network) and exponentially with the number of available spectrum resources. This paper proposes a novel quantum particle swarm optimization (QPSO) based relay selection and spectrum allocation scheme which can maximize three definitions of system throughput but has less computational complexity. Simulation results show that QPSO based scheme has the ability to find global optimal solution compared with other schemes in the literature.

关键词： Resource management Tin Optimization Interference Signal to noise ratio Relay networks (telecommunications)

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AUTOMATIC MULTI-LAYER PLANNING FOR PON DESIGN AND FAILURE SIMULATION

AUTOMATIC MULTI-LAYER PLANNING FOR PON DESIGN AND FAILURE SI...

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The 13th International Conference on Optical Communications and networks, ICOCN 2014(2014第13届光通信与网络国际会议)

作者： Yaocheng Yu Yuefeng Ji Hui Li Rentao Gu Yang Wang Guojun Liu Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts an China Electric Power Research Institute No.15Qing He Xiao Ying East RoadHaidian DistrictBeijing 1

We discuss the role of multi-layer plan in PON design and introduce a PON planning *** from the multi-layer mapping and routing mechanism,the automatic plan algorithm of multi-layers and related failure simulation are... 详细信息

关键词： multi-layer plan PON design

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Smart integration of cloud computing and MCMC based secured WSN to monitor environment

Smart integration of cloud computing and MCMC based secured ...

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International Conference on Wireless Communication, Vehicular Technology, Information Theory and Aerospace and Electronic systems Technology (Wireless VITAE)

作者： Muhammad R. Ahmed Hongyan Cui Xu Huang School of Information Technology and Engineering University of Canberra Canberra Australia Beijing Key Lab. of Network System Architecture and Convergence Beijing University of Posts and Telecommunications China

Wireless Sensor network (WSN) is a low cost and multifunctional emerging technology. Its application ranges from military, health sector, environmental monitoring and industrial application. The maximum benefit of recent technology development can be achieved by integration internet (Cloud Computing) and secured real time data collection platform (secured-WSNs). In order to ensure its functionality especially in malicious environments, security mechanisms are essential in WSNs. Malicious or internal attacker has gained prominence and poses the most challenging attacks to WSN. So, for complete security internal attacks need to be handled. In this paper we proposed content-based publish/subscribe (pub/sub) broker model on the Cloud that integrates WSNs to Cloud efficiently and effectively. To secure WSNs we have proposed a new approach for detecting internal attack by using Markov Chain Monte Carlo (MCMC). It is an efficient real time algorithm. It is good for sensor network as it operates with no or incomplete classification information. Our result shows the output of the internal attacker evaluation.

关键词： Wireless sensor networks Markov processes Security Peer-to-peer computing Monte Carlo methods Cloud computing Monitoring

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Interference matrix based user association scheme in heterogeneous cellular networks

Interference matrix based user association scheme in heterog...

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International Conference on Communication systems

作者： Tiankui Zhang Zixiong Peng Yutao Zhu Yapeng Wang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecoms China Syracuse University Syracuse USA MPI-QMUL Information Systems Research Centre Macao Polytechnic Institute Macau

ISBN: (纸本)9781479958337

User association is one of the key techniques of the resource management in the heterogeneous cellular networks (HetNets). Interference management plays an important role on the system performance improvement in interference limited cellular networks. In this paper, we address the user association problem from the view of interference management of HetNets. Especially, we consider the co-channel interference from both intra-tier and inter-tier, and propose an interference matrix based user association scheme. We use interference matrix to obtain the leakage plus noise ratio (SLNR) of each users in the HetNets. In the proposed scheme, the optimization problem of user association is modeled jointly taking the SLNR of users and traffic load of base stations into consideration, which gives a tradeoff between interference mitigation and load balancing. A simple but useful heuristic algorithm is given to obtain a suboptimal solution of the user association problem. We give the simulation results of the proposed scheme on the system throughput and user fairness, which can effectively achieve the tradeoff between interference mitigation and load balancing.

关键词： Interference Throughput Indexes Optimization Telecommunication traffic Load management Downlink

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