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Sort-based relay selection algorithm for decode-and-forward relay system

Science China(Information Sciences) 2013年第2期56卷 41-48页

作者： XIE Gang LIU YuanAn GAO JinChun LI XingZheng Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications School of Electronic Engineering Beijing University of Posts and Telecommunications Division of Research China Mobile Group Design Institute Co.

In this paper, a sort-based relay selection algorithm is proposed for decode-and-forward wireless relay systems. The proposed algorithm can reduce computational complexity and system overhead in the relay selection for practical decode-and-forward wireless relay systems with multiple sources and multiple relays. This would be a very important improvement. Firstly, the sufficient and necessary conditions for a relay to be feasible to a source are derived. By adopting relay transmission via its feasible relay, the source can improve channel capacity compared to direct transmission. Then, a sort-based relay selection algorithm is proposed based on the sufficient and necessary conditions. In the proposed algorithm, each relay makes decision on its feasibility individually, but the final source-relay paring decision is made in a centralized manner. Simulation results show that the proposed algorithm can provide considerable system performance improvement over the existing algorithm. Especially at low signal-to-noise (SNR) region, the performance of the proposed algorithm almost reaches the optimal one.

关键词： relay selection decode-and-forward relay cooperative communication wireless relay system

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Characterizing spatial and temporal dynamics of mobile internet services in cellular data network

Characterizing spatial and temporal dynamics of mobile inter...

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IET International Conference on Information and Communications Technologies, IETICT 2013

作者： Guo, Yan Liu, Jun Dong, Chao Zhou, Wenli Lei, Zhenming Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9781849196536

Understanding spatial and temporal dynamics of mobile internet services in cellular data network can be of great help to network management and service provisioning. To this end, we conduct the detailed measurement analysis of spatial and temporal dynamics from point of view of traffic generated by subscribers. The analyzation is based on a large-scale data set collected from a commercial ISP covering an entire city in Southern China. We analyze individual subscriber behaviors and observe a significant variation in network usage among subscribers. We characterize mobile internet services spatial and temporal dynamics and identity their relation to traffic volume. The data set tracks more than 3 million mobile subscribers. To handle the problem of big data processing, the data are parallel processed using MapReduce programming model, a novel framework for distributed computing with proved high efficiency and low cost features. Generally, our observations deliver important insights into mobile internet service and mobile subscriber behavior.

关键词： MapReduce

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A new hybrid clustering algorithm based on stimulated annealing

A new hybrid clustering algorithm based on stimulated anneal...

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2013 5th International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC 2013

作者： Zha, Chengji Dou, Yinan Guo, Minjie Dong, Yue Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9780769550114

In the recent years, more and more researches are preferred to focus on network user behavior. Usually, k-means clustering and Agglomerative Nesting (AGNES) are respectively chosen to analyze the network user behavior. But both the two kinds of algorithm have some disadvantages inherently. A kind of hybrid clustering algorithm (ASAKM) is proposed in this paper, which takes the advantages of both kinds of clustering algorithms. Furthermore, the idea of simulated annealing is also adopted in this paper, to implement the global optimal solution while the partitioning methods usually only reach the local optimal minimum. Experiments indicate that, with this new hybrid algorithm, the clustering results can be more accurate. © 2013 IEEE.

关键词： Simulated annealing

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Characterizing service providers traffic of mobile internet services in cellular data network

Characterizing service providers traffic of mobile internet ...

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2013 5th International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC 2013

作者： Li, Tingting Liu, Jun Lei, Zhenming Xie, Yun Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China

ISBN: (纸本)9780769550114

With the rapid rising of the number of cellular phone users, accessing the Internet via mobile device is becoming a new norm in terms of network activities and people's daily life, resulting in an ever-increasing usage of the mobile Internet. This paper analyze Service Provider (SP) traffic characteristics Based on the massive data collected from a commercial Internet Service Provider (ISP) covering an entire province in Southern China. We investigate the distribution of SP traffic volume and flow number. In particular, our study has scrutinized the rank of SP in terms of traffic volume distribution, flow number distribution, and subscriber number distribution, fitted with a distribution model named power law distribution. Furthermore, we characterize the correlations among the traffic volume, flow number and subscriber number. As distributed parallel processing system have been recently developed due to the cloud computing platform and the cluster file system, they could be usefully applied to analyzing big traffic data. Thus, in this paper, we propose a mobile Internet traffic analysis method Based on the Map Reduce software framework of the cloud computing platform for a large-scale network. © 2013 IEEE.

关键词： MapReduce

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Mining and Modelling the Dynamic Patterns of Service Providers in Cellular Data network Based on Big Data Analysis

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China Communications 2013年第12期10卷 25-36页

作者：刘军李婷婷 CHENG Gang 于华雷振明 Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Microsoft Corporation

Understanding the dynamic traffic and usage characteristics of data services in cellular networks is important for optimising network resources and improving user *** studies have illustrated traffic characteristics from specific perspectives,such as user behaviour,device type,and *** this paper,we present the results of our study from a different perspective,namely service providers,to reveal the traffic characteristics of cellular data *** study is based on traffic data collected over a five-day period from a leading mobile operator's core network in *** propose a Zipf-like model to characterise the distributions of the traffic volume,subscribers,and requests among service *** distinct diurnal traffic patterns of service providers are identified by formulating and solving a time series clustering *** work differs from previous related works in that we perform measurements on a large quantity of data covering 2.2 billion traffic records,and we first explore the traffic patterns of thousands of service *** of our study present mobile Internet participants with a better understanding of the traffic and usage characteristics of service providers,which play a critical role in the mobile Internet era.

关键词： mobile Internet service provider traffic measurement MapReduce time seriesclustering

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Characterizing smartphone traffic with MapReduce

Characterizing smartphone traffic with MapReduce

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2013 16th International Symposium on Wireless Personal Multimedia Communications, WPMC 2013 - Co-located with Global Wireless Summit 2013

作者： Yang, Jie Zhang, Shuo Zhang, Xinyu Liu, Jun Cheng, Gang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing China Microsoft Corporation Redmond United States

With the demand of increasing revenue by attracting customers consuming mobile internet services, traffic monitoring and analysis become more critical on network management and service provisioning for operators and ISPs. At the same time, the rapid growing number of smartphone clients led to more complexity and explosive mobile Internet traffic. It makes traditional traffic analyzing methods face challenge of dealing with huge amount of data. In this paper, we propose and implement a distributed computing system which aims to perform high-speed data-intensive network traffic analyses by leveraging MapReduce programming model. Running on this efficient system, we summarize characteristics of smartphone mobile internet traffic by analyzing massive real data which is captured from a living UMTS network of a major service provider of China. Our analysis is crucial for cellular providers to anticipate usage patterns and future traffic growths. © 2013 NICT.

关键词： MapReduce

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A new algorithm for physical topology discovery based on STP and AFT

A new algorithm for physical topology discovery based on STP...

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2013 5th International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC 2013

作者： He, Gang Liu, Yang Wu, Xiaochun Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9780769550114

Discovering the Ethernet's topology is very important for the network management. The way Based on STP and the way Based on AFT are the two main ways to do it. But hey both have some shortcomings when we do the discovering only by one of them. In this paper, we propose a new algorithm Based on the two ways to discover the topology in the LAN which will perform better. When there are switches which support STP and don't support STP, the result of our experiment demonstrate that our algorithm will be faster and more accurate than the traditional ways. © 2013 IEEE.

关键词： Topology

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Extracting and measuring quality of experience indicators of social business

Extracting and measuring quality of experience indicators of...

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2013 5th International Conference on Intelligent Human-Machine systems and Cybernetics, IHMSC 2013

作者： Wang, Ying Liu, Feng Lei, Zhenming Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9780769550114

A good quality of experience (QoE) is a critical factor to the success of mobile Internet business for Internet Service Providers (ISPs) and Internet Content Providers (ICPs). Based on the analysis of social applications' communication mechanism on smart phone, we proposed a group of QoE indicators to evaluate the QoE of social business from the user's experience perception perspective. Then, we analyzed the influencing factors further and brought forward the calculation method of these indicators. And on this basis, we discussed how to differentiate social applications' traffic and identify the user's specific behaviors from those traffic. After that, we adopted passive measurement technique to measure this group of indicators on iPhone platform in the actual network environments. The experiments' results show that, this group of indicators can reflect the user's real experience accurately when they use social business. © 2013 IEEE.

关键词： Smartphones

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Fragmentation-based dynamic multicast routing and spectrum assignment algorithm in spectrum-sliced elastic optical path networks

Fragmentation-based dynamic multicast routing and spectrum a...

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Asia Communications and Photonics Conference, ACP 2013

作者： Liu, Xiaoxu Gu, Rentao Ji, Yuefeng Bai, Lin Huang, Zhitong Beijing Key Laboratory of Network System Architecture and Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9781557529893

We define the fragmentation based on the blocking probability and propose a fragmentation-based dynamic multicast routing and spectrum assignment (FBDM-RSA) algorithm in spectrum-sliced elastic optical path (SLICE) networks. Simulation results indicated that the proposed FBDM-RSA algorithm outperforms some existing ones in both multicast network coding and spectrum fragmentation. © OSA 2013.

关键词： network coding

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Component analysis of GPRS traffic based on LLC frames from a live network

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9th International Symposium on Linear Drives for Industry Applications, LDIA 2013

作者： Wang, Huan Lei, Zhen Ming Gui, Xiao Lin Wu, Xiao Long Beijing Key Laboratory of Network System Architecture Convergence School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

ISBN: (纸本)9783037858639

GPRS is the dominant mobile Internet access in China. However, the nature of GPRS traffic characteristics remains unexamined for many reasons. In this paper, we present observations at both LLC-level and cell-level from passive monitoring of more than 2700 GPRS/EGPRS cell sites connected to the same SGSN at Gb interface. The traffic traces are from a major China ISP in one urban area of Northern Province during an ongoing 24 h period in August 2012. We found that user traffic averages at about 95% of overall traffic in both directions. Furthermore, we defined a cell-time record to measure the dynamic utility of radio resource and found that most cell sites have low traffic at most time, with the growth of total traffic load, the proportion of signal traffic declined correspondingly. All the conclusions in the paper are meaningful for researchers, network operators, and other members of the GPRS community. © (2013) Trans Tech Publications, Switzerland.

关键词： Cells

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