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National Doctoral Academic Forum on Information and Communications Technology 2013

作者： Zhang, Yan Liu, Jiang Huang, Tao Chen, Jianya Liu, Yunjie Key Laboratory of Universal Wireless Communications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 China Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China Future Network Industry Innovation Center of China Nanjing 211100 China

ISBN: (纸本)9781849198196

Content Centric networking (CCN) is one of the most promising future network architectures. Current researches on CCN routing scheme mainly focus on finding the best single routing path and then transferring all the content chunks along this path. For an Interest packet who should have had opportunities to be routed along multiple paths to reach more repositories but only been routed along one single path due to the single path routing scheme, the problems of low utilization of the network resources and unbalance of the load of the faces and repositories are caused. This paper focuses on how to make best use of multiple paths to route the Interests, and further transfer different chunks of the content back along the paths. According to the different network-status parameters, a Multi-path Interests Routing (MIR) scheme is proposed for CCN routing, which is based on Analytical Hierarchy Process (AHP). AHP is a method for obtaining the optimized result of the Interest packets allocation. The simulation experiments have been performed to evaluate the proposed scheme in terms of a wide range of performance metrics. The results show that the proposed scheme significantly outperforms existing scheme.

关键词： network architecture

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Parallelized Jaccard-Based Learning Method and MapReduce Implementation for Mobile Devices Recognition from Massive network Data

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China Communications 2013年第7期10卷 71-84页

作者：刘军李银周 Felix Cuadrado Steve Uhlig 雷振明 Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Department of Electronic Engineering and Computer Science Queen MaryUniversity of London

The ability of accurate and scalable mobile device recognition is critically important for mobile network operators and ISPs to understand their customers' behaviours and enhance their user *** this paper,we propose a novel method for mobile device model recognition by using statistical information derived from large amounts of mobile network traffic ***,we create a Jaccardbased coefficient measure method to identify a proper keyword representing each mobile device model from massive unstructured textual HTTP access *** handle the large amount of traffic data generated from large mobile networks,this method is designed as a set of parallel algorithms,and is implemented through the MapReduce framework which is a distributed parallel programming model with proven low-cost and high-efficiency *** using real data sets show that our method can accurately recognise mobile client models while meeting the scalability and producer-independency requirements of large mobile network *** show that a 91.5% accuracy rate is achieved for recognising mobile client models from 2 billion records,which is dramatically higher than existing solutions.

关键词： mobile device recognition data mining Jaccard coefficient measurement distributed computing MapReduce

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2.35 GHz near ground wideband channel measurement and characterization

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Journal of Information and Computational Science 2013年第2期10卷 335-343页

作者： Zhao, Min Wu, Muqing Yu, Deshui Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications Beijing 100876 China

The increasing interest that has been drawn to wireless sensor network technology is therefore required measurement and analysis of wideband mobile channel with near ground antennas. Using slippage correlation algorithm, a typical suburban environment was analyzed to compare the system performance in 2.33-2.37 GHz, with antenna elevation and sensor's velocity as only variables. Large and small-scale characteristics are both investigated. Results such as channel impulse response, power delay profile, paths number, delay spread, Doppler spectrum, path loss exponent and shadowing parameter are extracted, evaluated and reported.

关键词： Wireless sensor networks

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EM wave propagation in non-uniform soil

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Information Technology Journal 2013年第19期12卷 5011-5016页

作者： Li, Li Dong, Na Chen, Jianya Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications 100876 Beijing China

As an emerging research field, Wireless Underground Sensor network (WUSN) is getting more and more focused these years because of its tremendous application benefit in agriculture, industry, military and so on. As the determinant of the performance of WUSN, the propagation characteristics of electromagnetic (EM) wave in the soil must be deeply investigated. Usually the soil is assumed ideal and uniform in existing works which results in a non-ignorable discrepancy to the reality of underground propagation. In this study, the propagation of EM wave in non-uniform soil is theoretically analyzed. Moreover, a novel simulation method for it based on Kriging interpolation and ADI-FDTD is proposed, based on which the propagation of 300 MHz EM wave in non-uniform soil is simulated and analyzed. The results expose the striking impact of non-homogeneity of the soil to the underground EM wave propagation performance which must be seriously taken into account when design and construct WUSNs. © 2013 Asian network for Scientific Information.

关键词： Electromagnetic waves

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Optimization of Handover Measurement Procedure for TD-LTE networks in Mountainous Scenario

Optimization of Handover Measurement Procedure for TD-LTE Ne...

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2013 15th IEEE International Conference on Communication Technology

作者： Jiansong Miao Ankang Zhang Yan Wang Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781479900763

Handover(HO) is a key procedure in long term evolution(LTE) *** paper makes a detailed introduction on two aspects in HO measurement procedure—Layer3 filtering theory and the radio link failure(RLF) *** the channel environment in mountainous scenario has a great effect on received signal,we have made researches and optimizations on user equipment(UE) measurement signal *** procedure based on Layer3(L3) filtering and optimized RLF procedure are designed and implemented in a dynamic system level simulation platform which models the mountainous *** UE measured Reference Signal Received Power(RSRP) of source and target eNodeB with different L3 filtering factor have been measured to make a comparison and select the best ***-pong HO rate and RLF rate are used to evaluate the influence of L3 filtering to HO *** results show that the best L3 filtering factor is 1/6 and the optimized RLF procedure is effective in mountainous *** paper presents a new fast interpolation method based on edge *** method extracts image edge by improved canny operator which has two specified thresholds *** for different areas,it chooses different *** can keep edge details while doing quick *** experimental results show that the effect of this method can hold the edge details very well,and it is obviously superior to the traditional *** method provides a better initial image for the super resolution reconstruction.

关键词： Layer3 filtering Radio link failure Mountainous scenario RSRP

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An adaptive cross-layer optimization scheme for light compressed High-definition Video Transmission Based on 60 GHz system

An adaptive cross-layer optimization scheme for light compre...

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2013 15th IEEE International Conference on Communication Technology

作者： Wei Zhang Danpu Liu Beijing University of Posts and Telecommunications Beijing Key Laboratory of Network System Architecture and Convergence

ISBN: (纸本)9781479900763

By using 60GHz spectrum in high frequency carrier,IEEE 802.11ad is widely used in the transmission of high-definition *** this paper,an adaptive cross-layer optimization scheme is proposed based on IEEE 802.11ad which involves modulation and coding at the physical layer,retransmission policy at the medium access control layer and source coding at the video coding *** scheme aims at minimize the video distortion between original video at sending end and reconstructed video at receiver under certain time *** results show that the proposed scheme can select a proper combination of parameters at each layer mentioned above for a given SNR and greatly improve the overall performance in minimizing the video distortion.

关键词： IEEE 802.11ad HD video cross-layer optimization source coding modulation and coding retransmission

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Two-Staged Load Balancing Mechanism in LTE Self-Organization networks

Two-Staged Load Balancing Mechanism in LTE Self-Organization...

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2013 2nd International Conference on Mechanical Properties of Materials and Information Technology(ICMPMIT 2013)

作者： Li Li Zhang Jingjing Chen Jianya Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

In mobile communication system,the traffic is time-varying and unpredictable,so there will be some hot-spot *** means that,the number of service request is much higher than an acceptable level in some cells,which may result in call-blocking with a large *** in other cells of system there are still resources available to serve more *** to avoid the imbalance to effectively improve the system's resource utilization is what load balancing need to *** this paper,a new kind of event-trigger mechanism using cell load status information exchange between eNBs via X2 interface is ***,based on it,a novel load balancing algorithm,named TSLB(two-staged load balancing),for LTE systems is put *** this algorithm,eNBs can start corresponding load balancing procedure accurately according to the cell load status in real-time without any manual *** results show that the method is valid and it can increase the system throughput significantly as well as decrease the network delay.

关键词： LTE SON Load balancing Trigger mechanism Handover

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A cyclic time-delay-based distributed precoding relay system

A cyclic time-delay-based distributed precoding relay system

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2013 15th IEEE International Conference on Communication Technology

作者： Jiansong Miao Chaoyi Zhang Lin Ma Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781479900763

In order to alleviate the multipath interference of the MIMO multi-relay system and improve the system spectrum efficiency,this paper presents a cyclic delay distributed precoding relay *** channel state information(CSI) sent from the source node,according to its phase information and relay node's matrix match,sends the signals to destination node via specific relay node,rather than the tradition broadcasts to all *** at the relay node,we design a distributed precoding cyclic delay relay scheme to improve and balance the destination node's received signal *** last,the receiver achieves the signals coherent combination and completes the system *** results show the proposed distributed precoding scheme improves the system capacity,reduces the encoding complexity,and is well suited for multi-relay system.

关键词： Cooperative communication CSI Multi-realy system Distributed precoding

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A Fast Relay Selection Algorithm over 60GHz mm-Wave systems

A Fast Relay Selection Algorithm over 60GHz mm-Wave Systems

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2013 15th IEEE International Conference on Communication Technology

作者： Kan Song Ran Cai Danpu Liu Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

Due to the weak diffraction,millimeter-wave(mm-Wave) communication is vulnerable to human *** technology is an effective way to cope with LOS link ***,how to quickly find appropriate relay is critical to network performance due to the need of transmission *** paper proposes a fast relay selection(FRS) algorithm based on the geographical location *** narrowing the relay candidates in specific sectors,FRS greatly reduces the relay searching overhead time compared with traditional exhaustive relay selection(ERS).Simulation results show that FRS improves searching efficiency at the expense of the minimal loss of channel capacity.

关键词： IEEE 802.11ad Relay Human blockage Fast relay selection

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On the Optimal Pre-Coding Of Complex Field network Coding with Mpsk Modulation

On the Optimal Pre-Coding Of Complex Field Network Coding wi...

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2013 15th IEEE International Conference on Communication Technology

作者： Yijun Guo Jianjun Hao Guangxin Yue Beijing Key Laboratory of Network System Architecture and Convergence Beijing University of Posts and Telecommunications

ISBN: (纸本)9781479900763

Complex field network coding(CFNC) enables a one-to-one mapping between the source signal vectors and the received *** outperforms other physical layer network coding methods which decode the received signal as a combination of source ***,the linear constellation pre-coding(LCP) scheme adopted by CFNC to compute complex coefficients is developed for MIMO system,which is not sufficient to achieve the optimal performance of *** paper considers the encoding process of CFNC as constellation rotations at sources and proposes an optimal rotation method to maximize the minimum Euclidean distance between equivalent constellation points at the *** performance gains are proved by both numerical evaluations and simulation results.

关键词： Complex field network coding,linear constellation pre-coding,constellation rotation,equivalent superpositioned constellation

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