Telecommunications Science

Characteristics,Development Strategies and Challenges of Internet of Things

Leping Wei

2011, 27(5): 1-5. doi:10.3969/j.issn.1000-0801.2011.05.001

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The article describes connotation,architecture and strategic meaning of Internet of Things at the beginning.Then,the article discuses and analyzes market space,characteristics and position of carriers within this ecosystem chain.In the following part,the article analyzes traffic characteristics,effects to networks and core technologies of Internet of Things.Finally,the article explores growth strategies,major challenges and likely future.

Think Twice Before Operating the Mobile Payment Service

Yunhua Zhang,Haiying Gu

2011, 27(5): 6-11. doi:10.3969/j.issn.1000-0801.2011.05.002

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In this thesis,we go deep into such three key questions of mobile payment service as market space,fulcrum and development direction in the long run,and put forward the development strategy by stages in order to develop the mobile payment service.

Exploration of Development Mode for Telecom Operators Carrying out the Application of Family Information in All-Optical Network

Hai Jin,Wenchao Liu,Xiang Wan,Weifeng Zhao

2011, 27(5): 12-16. doi:10.3969/j.issn.1000-0801.2011.05.003

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Begin with the development of copper back into the fiber and broadband acceleration,combined with PON access,cloud computing and other new technologies,this article explore the development mode for telecom operators carrying out the application of family information in all-optical network,including access terminal morphology and family scenarios,innovation of information application,home broadband services and other aspects of Internet,putting forward development proposals for family-related information products and business in the context of copper back into the fiber and fiber urban development.

Multi-Terminal Converged Communication Business Analysis and Implementation Research in the Context of All-Optical Network

Jianting Han,Xiang Wan

2011, 27(5): 17-22. doi:10.3969/j.issn.1000-0801.2011.05.005

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With the development of the Internet,the contradiction between user experience and bandwidth capacity has become the primary challenge of the telecom operator.Therefore,accelerating the development of optical access has been a new round of the broadband strategies for operators.The paper mainly analyzes the major features and capacities of diverse terminals,such as mobile phone,PC and PAD.In addition,converged communication business scenario after fiber into the home network is presented.Finally,the preliminary solution of implementing multi-terminal converged communication for operators is proposed in this paper.

Application and Analysis of Home Networking Technology

Xiang Wan,Zhiyong Ma,Weifeng Zhao,Wenchao Liu

2011, 27(5): 23-28. doi:10.3969/j.issn.1000-0801.2011.05.006

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With technological development and intense competition,domestic and foreign operators have accelerated the construct of optical network.Integrated application of home networking-related technology is the key strategy of family information for all-optical network.Firstly,major difficulties faced in the process of promoting home information are described.Additionally,panorama of home networking industry is introduced,and through comparative analysis of home networking-related technology,home networking solutions and products are proposed for various typical scenario of indoor connection.Lastly,the paper has summarized the future direction of home networking-related technology and products.

Research on Home Network Management System in Fiber Replace Copper

Ming Xie,Xiangfei Hou,Wenchao Liu,Shilong Li

2011, 27(5): 29-32. doi:10.3969/j.issn.1000-0801.2011.05.008

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How to evolve home network management system in fiber replace copper has the problem that telecommunications operator need to solve urgently.This paper provides discussion on the evolution of home network management system,to fulfill the management of home equipments and home network.With home network management system,home network service can be fulfilled automatically,and home equipment failure can be handled remotely.

Cloud Store Application System in Home Network With Optical Access

Bingsong Hu,Wenchao Liu,Xiang Wan,Ming Xie

2011, 27(5): 33-37. doi:10.3969/j.issn.1000-0801.2011.05.010

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As the fast deployment of cloud computing and optical access to house,the application mode of cloud store in home network is changing.This paper introduces a high performance and easy to use application scheme of cloud store in the home network with city optical access network.By combining the home application terminals and the Internet with cloud store,the information sharing abilities of the home application terminals are enforced effectively.

Status and Development of Aeronautical Ad Hoc Networks

Bo Zheng,Hengyang Zhang,Guoce Huang,Qinghua Ren

2011, 27(5): 38-47. doi:10.3969/j.issn.1000-0801.2011.05.011

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Recent years,with the research and application of mobile Ad Hoc networks,some research institutes and researchers have been applying them to aeronautical communications,which gives birth to a new research field,Aeronautical Ad Hoc network （AANET）.Basic concept,main characteristics and applications of AANET are summarized,the active research institutes and their main works about AANET are introduced,the key technologies are analyzed,and the prospects for its development are given.

Adaptive Binary-Tree ALD Scanning Algorithm

Wensheng Li,Chunjian Deng,Yi Lv,Renze Luo

2011, 27(5): 48-53. doi:10.3969/j.issn.1000-0801.2011.05.012

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Firstly,an ALD scanning algorithm based on binary-tree,which uses a collision queue to resolve the collision occurred during the scanning process and generate new search code string,is put forward according to the feature of AISG communication.Then an adaptive binary-tree ALD scanning algorithm is proposed on the basis of the characteristics of the binary scanning tree.The algorithm can skip some of the collision nodes in the light of the prior scanning results and enhance scanning efficiency.The adaptive binary-tree scanning algorithm was adopted in our RET control system,and the practice shows that the algorithm has better adaptability and can scan various ALD devices from different vendors quickly and accurately.

Discussion on the Channel Measurement and Channel Model Under High Speed Railway Environment

Liu Liu,Cheng Tao,Li Yu,Weihui Dong

2011, 27(5): 54-60. doi:10.3969/j.issn.1000-0801.2011.05.014

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The high-speed railway in China attracts the worldˊs attention.The wireless communication between the train and the ground has been one of the most top issues in industry and academe.The wireless is critical when designing channel communication system.In this paper,the related work on measurement and research,the recent proposals have been reviewed.Then the challenges of measurement and channel modeling in high speed scenario are presented such as the differences between various wireless coverage methods,the characteristics of wireless channel in overlapped cell field,channel reciprocity,non widesense stationary uncorrelated scattering（WSSUS）and birth-death propagation of multipath channel.

Research and DSP Realization of Turbo Internal Interleaver Algorithm in LTE-A System

Fatang Chen,Taotao Liang,Shaoxu Wu

2011, 27(5): 61-65. doi:10.3969/j.issn.1000-0801.2011.05.016

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Based on the recently released LTE-A（long term evolution-advanced）R10 standard by 3GPP,this paper researched two internal interleaver algorithms which were used commonly.Balancing the complexity of the time against memory space,it choosed the most suitable internal interleaver algorithm for the TD-LTE wireless integrated test instrument,and realized the algorithm in the TMS32064xDSP.The operation results of the Turbo internal interleaver program in CCS3.3 verify that the checking table created arithmetic is feasible and effective.

Study on Comparison and Verification of NE's Topology Discovery in IP MAN

Xiaoyong Lin,Zhenkun Mi,Chunyun Jiang

2011, 27(5): 66-71. doi:10.3969/j.issn.1000-0801.2011.05.017

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Extracted the complex MAN switch-connections to abstract network element（NE）topology,for fulfilling the high standards of operator's OSS,a general NE's topology discovery（GTD）algorithm was promoted to physical port class that started from the leaf node and ended by the root.When comparison and verification with the RADIUS dial-up list,an improved topology discovery algorithm with NE's weight-added（WA）was provided to lift the consistency.Due to the operator's high needs of dependable and trustable topology data to telecommunication level,a creative ant path characteristic（APC）algorithm was designed to discovery the user logic path from the root to the leaf reversely.The trusted NE's topology data not only show up the operator's high management,but also prepare for next period of automatic service operation（APO）system.

Security Problems of CDA Mechanism and Its Solutions

Jun Feng,Yu Pan,Xu Chen

2011, 27(5): 72-76. doi:10.3969/j.issn.1000-0801.2011.05.018

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CDA（continuous double auction）mechanism is widely used in the fields of e-commerce,but the security issues have gained little attention.In this paper,the related issues about CDA are analyzed and the problem of repudiation,impersonation,forging and hard to verify is pointed out.The RSA public key cryptosystem and digital signature are utilized to solve this problem.In the end,our scheme is proved theoretically to be effective to handle the problem.

Improved User Profile Based on the User Browsing Behavior

Weichao Li,Yonghua Fu

2011, 27(5): 77-81. doi:10.3969/j.issn.1000-0801.2011.05.020

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This article mainly discussed and established a kind of improved user profile based on the user browsing behavior.In the user profile,we overall take into account the user browsing web pages behaviors,the level of interest to keywords,the user's short-term interests and long-term interests.We realize the WIPISES demo system under the.NET platform,the improved user profile is embedded in the system.The results of the simulation experiments indicate that the retrieval effects which use the improved user profile provided in this article surpass the general search engines.And with the web user's preference is stronger,the superiority of the WIPISES system is more obvious.

Study on Dynamic Spectrum Assignment Based on Cloud Computing in WSN

Yuhong Yuan,Jie Yang,Xueping Zhang,Junli Jing

2011, 27(5): 82-87. doi:10.3969/j.issn.1000-0801.2011.05.021

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As the rapid development of wireless sensor network（WSN）,the demands of limited radio frequency spectrum rose sharply,thereby dealing with the frequency assignment of WSN scientifically and efficiently was a hard nut to crack.To improve the frequency utilization rate and solve the dynamic frequency configuration problem of multi-nodes in WSN,a novel spectrum management system for WSN combined with cloud computing technology was proposed in this paper.The frequency assignment system was based on the network architecture of WSN.The system also took advantage of cloud resource allocation,distributed memory and self-adaptive analysis so that it allotted the frequency dynamically and automatically in WSN.This was an efficient path to meet the needs of WSN spectrum management.

Research Progress on Energy Hole Problem in Wireless Sensor Networks

Chugui Xu,Xiaoheng Deng

2011, 27(5): 88-92. doi:10.3969/j.issn.1000-0801.2011.05.022

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This paper analyzed the characteristics of wireless sensor networks and the main factors affecting energy holes firstly,and then reviewed the proposed schemes for avoiding energy hole in recent years.Finally,concluded the existing and emerging problems in energy holes.

GBDB Model Analysis of MIMO Channels in Tunnel

Zhijun Teng,Xiaoxia Li

2011, 27(5): 93-97. doi:10.3969/j.issn.1000-0801.2011.05.023

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Multiple-input multiple-output （MIMO）can effectively weaken the phenomenon of multipath fading in wireless transmission technology.3D-GBDB model of MIMO channel in mine tunnel was established.A space-time correlation function is derived from this model.MIMO channel capacity in mine is simulated.The results indicate that capacity of mine MIMO system is primarily depended on spatial correlation of mine roadway and increasing the number of receiver antennas or the antenna

New Layered Multicast Congestion Control Protocol

Mu Zhang,Pan Wang

2011, 27(5): 98-104. doi:10.3969/j.issn.1000-0801.2011.05.025

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Data Prefetching Model for VOD Proxy Based on GA-BP Neural Network

Yajun Jiang,Zhenlun Yang

2011, 27(5): 104-109. doi:10.3969/j.issn.1000-0801.2011.05.026

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The prefetch algorithm of proxy servers is the key element to determine the efficiency of VOD system in campus networks.This paper presents a data prefetching model,BP neural network is used to build the classifier,and the classifier is applied to classify the programs in VOD system,and the classification results were used to commit data prefetch based on group structure and demand rate consideration.Genetic algorithm was introduced to improve the BP neural network,so the problem of incidental trap in local minima with BP neural network was overcome.The simulation results show that model can achieve a good hit ratio and effectively improve the utilization of the VOD proxy servers.

Analysis of Interfaces and Services Monitoring and Baseline Management

Ling Gai

2011, 27(5): 110-115. doi:10.3969/j.issn.1000-0801.2011.05.028

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This article states in details about the implementation of interfaces and services monitoring,technical principle,logic structure,and functions requirements analysis,to improve the enterprise security assurance level and efficiency.

Integrated Resource Management Based on Meta-Model

Yinghui Zhang,Zhiwei Li

2011, 27(5): 116-120. doi:10.3969/j.issn.1000-0801.2011.05.030

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Building application programming interface of the business object operations by meta-model,it can effectively manage different network resources and dynamically create,adjust or upgrade the equipment,meet complex integrated network resource management needs.

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