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    15 November 2011, Volume 27 Issue 11
    Project: the development of cdma2000 and LTE converged network evolution
    Evolution for Radio Access Network of cdma2000 System
    Xiaodong Chen,Henghua Lin,Qingyang Wang,Kang Cai
    2011, 27(11):  6-13.  doi:10.3969/j.issn.1000-0801.2011.11.003
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    In this paper,the evolution of radio access network architecture,equipment structure and function,as well as macro cell antenna and indoor distributed antenna systems is studied. At the same time,some key solutions amd technologies are also analyzed. As a result,some suggestions of LTE deployment for CDMA operators are provided.

    Development and Evolution of cdma2000 Packet Domain Network
    Jiuyu Chen,Lan Zhang,Linfeng Zhang
    2011, 27(11):  14-18.  doi:10.3969/j.issn.1000-0801.2011.11.004
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    This article describes the current situation of cdma2000 packet domain network,analyzes the evolution of cdma2000 packet domain network in the intelligent pipeline realization,the transition of IPv4 to IPv6,eHRPD/EPC introduction, convergence database needs and technical implementation scheme. Finally,based on the development trend of mobile network, user service requirements and business operation needs,the overall scheme and evolution process of the packet domain is suggested.

    Globle Development and Commercial Progress of LTE
    Shangkun Xiong,Hongmei Zhu,Qingyang Wang,Leming Hu
    2011, 27(11):  19-22.  doi:10.3969/j.issn.1000-0801.2011.11.005
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    In this paper,the development of LTE technology,equipments,devices,chipsets and the latest operating situation are described,and typical commercial cases are analyzed firstly. And then,further developing direction of LTE technology and industry is discussed. In the end,suggestions are provided for development of LTE in China.

    Analysis on LTE Self-Organizing Network Technology
    Jinlian Wu,Hangzhou Jiang
    2011, 27(11):  23-29.  doi:10.3969/j.issn.1000-0801.2011.11.007
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    The increasing prevalence of HetNet and multi-technology network pose significant complexity of network O&M. To improve efficiency of network deployment and operation,and to reduce OPEX,3GPP initiates the work towards standardizing self-organizing capabilities for LTE in R8,R9. This article introduces the latest status and standard development of LTE SON, the main features and solutions of self-configuration,self-optimization and self-healing,and analyzes the future and positioning of the LTE SON development trend.

    Optimization and Enhancement on Technology of Handover Between eHRPD and LTE
    Peirong Xie,Lupeng Li
    2011, 27(11):  30-34.  doi:10.3969/j.issn.1000-0801.2011.11.009
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    This paper introduces the newly progress on standards of handover between eHRPD and LTE,and describes the flow of handover from LTE to eHRPD. Based on the analysis above,it proposes optimization and enhancement on non-optimized handover between eHRPD and LTE.

    Cloud computing column
    Business Intelligence Ontology Cloud Architecture Design
    Xingming Guo,Yugang Zhu,Kaijun CHEN,Yong He
    2011, 27(11):  35-40.  doi:10.3969/j.issn.1000-0801.2011.11.010
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    With the development of internet and cloud computing technology,e-business has reached a new height,business intelligence(BI). In order that business intelligence system can highlight its characteristics such as user-oriented,easy to access, self-programming in cloud computing,a triple architecture of business intelligence ontology cloud is proposed,and business cloud words,cloud table,cloud calculating are researched,and eventually business intelligence ontology middleware platform model is designed. This model allows developers not only to exponentially increase the efficiency,obviously shorten the cycle, greatly reduce the cost,but also to greatly extend the life cycle of the system.

    Study on Hybrid Cloud for Public Safety Monitoring and Forecasting
    xuelin Shi,ying Zhao,na Li
    2011, 27(11):  41-46.  doi:10.3969/j.issn.1000-0801.2011.11.012
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    To process massive data collected in real time,efficient and economical computing services and storage services are urgent. This paper presents a hybrid cloud infrastructure for public safety monitoring and forecasting,which integrates high performance computing and virtual private cloud and provides users with software services. Also we designes a scheduling algorithm and QoS policy to assure efficiency of the platform.

    ALP:An Adaptive Load Balancing Method for CometCloud
    Weihong Hong,Tao Liu,Shaobin Huang,Wansong Zhang
    2011, 27(11):  46-50.  doi:10.3969/j.issn.1000-0801.2011.11.013
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    Dynamic load balancing plays a very important role in assigning the task workload,improving system throughput, enhancing network capacity and shorting the processing time of the task in cloud computing. However,due to the node running information constantly changing,existing dynamic load balancing strategy is difficult to solve this problem. Adaptive load policy (ALP)is given by a dynamic load balancing method,which can easily obtain running nodes information,and accurately calculate the load status using self adaptive loading model. Compared with other load balancing strategy,ALP has well performance in experiment based on CometCloud.

    Study and Implementation of Distributed Real-Time Search Engine Model Based on Solr
    Weiwei Fu,Renfa Li,Yufeng Liu,Songli Huang
    2011, 27(11):  51-56.  doi:10.3969/j.issn.1000-0801.2011.11.015
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    Real-time search is a hot spot in research of information retrieval. In the distributed environment of big data and high concurrent,traditional search engine can not guarantee to make real-time response and data disaster tolerance. In this paper,we proposes a distributed real-time search engine model based on Solr,then explaines the principle and the procedures in detail. The memory index and disk index are integrated organically to present information in time. We brings out CommitLog to ensure memory index metadata disaster tolerance. Master/Slave model carry guarantee of high availability of search service. Practice has proved its feasibility.

    Constructing a Private Cloud Computing Platform Based on Eucalyptus
    Fan Zhang,Lei Li,Chenghu Yang,Lizhen Chen
    2011, 27(11):  57-61.  doi:10.3969/j.issn.1000-0801.2011.11.017
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    With the rapid development of cloud computing,public cloud plays an important role in data processing and online service. Meanwhile,private cloud computing is gradually,widely used in the scientific laboratories,workstations,internal enterprises and other small-scale distributed computing situations,as it features security guarantee,high flexibility in resources allocation and simple hardware requirements. Based on Eucalyptus open source platform,we have constructed a private cloud computing platform,which is particularly suitable for scientific labs and intranet. It allocates resources flexibly,meets different needs from programming,testing to management. Also,it’s a practical platform for clusters,distributed computing and cloud computing applications etc.

    Research on Term Weighting Based on MapReduce
    Kai Wang,Shuicai Shi,Tao Wang,Xueqiang Lv
    2011, 27(11):  62-65.  doi:10.3969/j.issn.1000-0801.2011.11.018
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    Term recognition is widely used in the ontology construction,dictionary construction and other fields. And term weighting is a key step in the term recognition. In this paper,several improvements have been made to TF-IDF algorithm,e.g., the length of terms is considered in weighting,also with terms’ correlations to documentation set. The candidate term weight is calculated in a distributed manner based on MapReduce on Hadoop. Experimental results show that the method proposed not only simplifies the steps of term weighting,but also improves the efficiency of the algorithm.

    research and development
    Study on the Next Generation Internet Architecture Converging with Internet of Things
    xin Liu,Ke Xu,wenlong Chen,yudong Zhao
    2011, 27(11):  66-74.  doi:10.3969/j.issn.1000-0801.2011.11.020
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    Recently,nations,enterprises and academic communities pay more and more attention to the IoT. However,as the extent of the internet,the development of IoT is being severely restricted by the same problems that the internet itself is suffering,such as the exhaustion of IP addresses,insufficient security mechanism,and inadequate support to mobile communication. It is desirable that the problems may be settled by the technology of next generation internet(NGI)marked with IPv6,therefore it is important to design the next generation internet architecture converging with the internet of things. Up to now,researching groups have already put forward various kinds of IoT architecture,most of which,however,focus on specific application scenes,and lack inheritance for the internet and compatibility for different application scenes. This paper presents a convergent architecture of IoT and NGI,which has such features as compatibility,adaptability,simplicity and efficiency,also,it points out some issues that need to be further studied in the new architecture,and the elementary ideas to solve them.

    Study on Key Technologies of Green Wireless Communications with Energy Efficient Wireless Access Network
    Xiao Xiao,Xiaoming Tao,Jianhua Lu
    2011, 27(11):  75-83.  doi:10.3969/j.issn.1000-0801.2011.11.022
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    Recently the extremely huge energy consumption and the negative impact on environment caused by wireless communication networks have become one of the central issues throughout the communication industry and even the whole world. For the purpose of improving energy efficiency and reducing the energy cost of wireless communication,green wireless communication has received universal attentions and become one of the keen interests in the global communication industry. From the perspective of energy consumption of wireless communication networks,this paper firstly studies the energy distribution of the whole networks and points out that the access network segment is the main source. Furthermore,the relevant principles, approaches,and key technologies for energy optimization based on wireless access networks are comprehensively analyzed from three perspectives which are component level,link level,and network level,aiming at establishing energy efficient wireless access network and optimizing network energy consumption significantly.

    An Algorithm of Channel Estimation Based on Space-Time Correlation in MIMO OFDM System
    Xin Geng,Hanying Hu,Yanan Dun
    2011, 27(11):  84-89.  doi:10.3969/j.issn.1000-0801.2011.11.023
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    In this paper,an algorithm of channel estimation based on space-time correlation in MIMO OFDM systems is proposed,which adopts an LS channel estimation scheme of time domain for initial estimation and exploits full information of the space-time correlation known at the receiver. The optimal weight of the space-time filter for the initial estimation is obtained by minimizing the MSE of channel estimation in average sense of multiple symbols in the FIR window. Further,the complexity of the algorithm is greatly decreased by the SVD method. Finally,simulations show that this algorithm derived outperforms the conventional MA algorithm of channel estimation in the performances of the MSE and BER when the optimal length of the FIR window reaches under the same conditions. And at some conditions,the performance of the algorithm can approach the performance of the ideal channel estimation,and can be improved with the space-time correlation increased.

    A Special Channel Estimation Method for the High-Speed Railway Scenario in LTE
    Chao Dong,Xiaoguang Li,Liu Liu,Cheng Tao
    2011, 27(11):  90-94.  doi:10.3969/j.issn.1000-0801.2011.11.025
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    In the downlink transmission,LTE(long term evolution)system adopts OFDM technology,which modulates the highspeed data streams to N way orthogonal carriers. As a result,it is so vulnerable to the impact of frequency offset,especially in the Doppler frequency shift of high-speed environment,there will be a serious interference. In this paper,a special channel estimation process in LTE system is proposed for high-way environment. It is based on LS estimation,employing the methods of the CP-based frequency offset estimation and time domain energy concentration and other treatment to meet the high-speed mobile environment. Simulation results show that this method is more suitable for high-speed scenario compared with traditional methods,and as the speed reached 500 km/h,the error rate is still well-behaved.

    The Internet of Scenes and Its Key Technologies and Applications
    li Liu,Xueyun Ma,Qingqing Liu,Jian Wang
    2011, 27(11):  95-99.  doi:10.3969/j.issn.1000-0801.2011.11.027
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    The Internet of scenes(IOS)is a new generation of information network,and the extension of the Internet of things technologies. IOS performs the data and information exchange based on the IOT technologies. IOS builds up the real-time augmented reality(AR)environment on the terminal devices using AR technologies,and combines the application data into the 3D AR environment for visualization. The end user interacts with objects in the AR environment using natural interactive methods. By this way,IOS provides an immersing user experience to the operator. This paper introduces the structures, functionalities of IOS and its relationship with the Internet and the Internet of things. This paper also discusses the key technologies of IOS and its potential applications.

    Research on Internet Security Model Based on ID/Locator Split Architecture
    Qiang Wu,Lin Chen
    2011, 27(11):  99-104.  doi:10.3969/j.issn.1000-0801.2011.11.028
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    As intelligent pipeline,basic network should in the technical advantage for the purpose of open,simple and sharing based on,to establish a complete and perfect security system,to ensure the true source of network information by means of the network architecture,to achieve reliable comprehensive management capabilities for network,service and subscriber. This paper analyses the internet security problem,proposes an internet security model based on ID/locator split architecture,through the establishment of internet unified identity management system,gradually forms a credible ecological system of internet events causal relationship logical structure.

    Improved Quantum Genetic Algorithm and Its Application in Coverage Optimization of Wireless Multimedia Sensor Network
    Ying Yan,Jian Guo,Lijuan Sun
    2011, 27(11):  105-110.  doi:10.3969/j.issn.1000-0801.2011.11.029
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    Quantum genetic algorithm(QGA)was researched in this paper. In QGA,only one optimal chromosome was used to direct the evolution of population,and the algorithm was subject to a local optimal solution. The problem was analyzed in this paper and the approach of using multiple elite chromosomes to guide the evolution was proposed. The generating,maintenance and action of elite chromosomes were discussed and an elite group based quantum genetic algorithm(EQGA)was advanced. And then EQGA was applied to the coverage optimization problem of wireless multimedia sensor network. Comparison tests showed that solutions obtained by EQGA were always better than those got by genetic algorithm and SQGA.

    Research and Practice of PC Serverˊs Energy Efficiency Measuring
    Zhiqin Huang,Xianxu Li,Hongfei Qiu
    2011, 27(11):  111-118.  doi:10.3969/j.issn.1000-0801.2011.11.031
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    PC server is an important kind of IT equipment in enterprise’s business operations,the energy consumption of itself and associated cooling energy consumption is the main components of enterprises energy consumption,how to accurately measure the energy efficiency of PC servers,and select energy-efficient PC servers equipment in order to save energy and increase efficiency is an issue facing by the enterprises. This article focuses on the PC server energy efficiency measurement method, according to a large number of measurement practices,reveals differences in equipments energy consumption of different manufacturers,shows the relationship of energy efficiency between rack servers and blade servers and the factors that affecting the performance of energy efficiency.

    Research on Key Technologies of Quality of Service of P2P
    Guangxue Yue,Jiajia Song,Xiaofeng Xiong,Jiansheng Liu
    2011, 27(11):  119-122.  doi:10.3969/j.issn.1000-0801.2011.11.032
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    With the quickly development of science,streaming media application has become one of the main services over internet. How can it support the large-scale customers and improve the quality of service . Based on the characters of P2P,it compares and analyzes the typical flow service strategy of media streaming system,and summarizes the features and shortcomings of different systems. Moreover,it takes the node selection,data scheduling,cache mechanism,error-tolerance,and incentive mechanism as the evaluation index,focuses on the quality of service of current typical streaming media system. Finally,future works about the quality of service of media streaming systems in P2P networks are outlined.

    A Improvement of Load Balance Based AODV Protocol for MANET
    Yu Wang,Jie Tian,Lei Xu
    2011, 27(11):  123-126.  doi:10.3969/j.issn.1000-0801.2011.11.033
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    As the increase of the MANET load,the existing MANET routing protocols suffer a rapid performance drop. In this paper,we propose an algorithm for path select and acknowledge refuses based PS-AODV routing protocol,make improvements in AODV. Simulation result shows that the PS-AODV protocol improves packet delivery ratio,reduces average end-to-end latency and decreases routing overhead.

    New Technologies and Applications of Ultra-High Speed Optical Communication
    Jianxin Lv
    2011, 27(11):  127-133.  doi:10.3969/j.issn.1000-0801.2011.11.034
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    This paper describes new technologies that will be used in 40 Gbit/s,100 Gbit/s and higher rates ultra-high speed optical communication,including phase modulation,quadrature amplitude modulation,multi-level modulation and other new modulation techniques such as polarization multiplexing and orthogonal frequency division multiplexing,also coherent receiver technology principles,the advantages and application necessity,photonic integration technology and evolution. The end of this paper introduces the applications about these new technologies in ultra-high speed optical communication such as 400 Gbit/s/1 Tbit/s. This article also describes the research progress of fiberhome in ultra-high speed optical communication,including research results of 100 Gbit/s ethernet and 1 Tbit/s coherent optical orthogonal frequency division multiplexing(CO-OFDM)1 040 km error-free ordinary single-mode fiber transmission .

    Operational support technological innovation BBS
    Operation Support and Service Management System Providing Open Information Service
    Lijuan Min,Zhu Zhu,Gaojian Lou,Hanhua Lu
    2011, 27(11):  134-140.  doi:10.3969/j.issn.1000-0801.2011.11.036
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    With the development of market requirements and the maturity of technology,ICT services face great changes. Today, the ICT services widely used are more open and more integrated. The operations of the services are more dynamic,and the value chain of the operations are more complex. Obviously,in this situation,operation supports and service management become more complex and uncertain. Based on TM framework and ITIL,methodologies and technologies for operation support and service management systems are discussed in this paper,which are used to buid stable and flexible operation support and service management systems for the open and integrated ICT Services.

    A Search Method of Network Resource Inventory Based on Configuration Strategy
    Rui Wang,Yinghui Zhang,Li Chen
    2011, 27(11):  141-146.  doi:10.3969/j.issn.1000-0801.2011.11.037
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    The traditional search methods of network resource inventory are based on the relational database. The search efficiency is poor when dealing with the massive and complicated data in network resource management system. This paper produces one search method of network resource data based on the configuration strategy,which not only provides the integrated and fast search method,but also implements the search results changing if need with the user behavior analysis.

    Research and Practice of Middleware Performance OptimizationBased on Web EOMS
    Yonghua Zhang
    2011, 27(11):  147-154.  doi:10.3969/j.issn.1000-0801.2011.11.038
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    This article analyzes the system technical characteristics of Web-based middleware architecture,the performance problems of network system operation environment,such as the host system,network,database,middleware,application structure, and identifies the reasons that affect performance and the theoretical method of adjusting the parameters. Through the reasonable parameter values,we can reduce the impact caused by the eliminate of network management system.

Copyright Information
Authorized by: China Association for Science and Technology
Sponsored by: China Institute of Communications
Posts and Telecom Press Co., Ltd.
Publisher: Beijing Xintong Media Co., Ltd.
Editor-in-Chief: Chen Shanzhi
Editorial Director: Li Caishan
Address: F2, Beiyang Chenguang Building, Shunbatiao No.1 Courtyard, Fengtai District, Beijing, China
Postal Code: 100079
Tel: 010-53879277
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E-mail: dxkx@ptpress.com.cn
Mailing Code: 2-397
ISSN 1000-0801
CN 11-2103/TN
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