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15 May 2009, Volume 25 Issue 5

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Technology and Application for Optical Grid

Guo Wei,Jin Yaohui,Sun Weiqiang and Hu Weisheng

2009, 25(5):  1-5. 

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Optical grid is a novel technology and promising solution to support large-scale distributed scientific applications. This paper introduces the backgrounds of optical grid, and analyses key technological problems and development of optical grid, and gives the typical applications.

A Technical Network Framework for Realizing Mobile Internet Services

Dong Bin,Cao Min,Xue Lihong and Zhou Feng

2009, 25(5):  6-10. 

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Mobile Internet service is a combination of Internet service and mobile telecommunication service, both are developing rapidly. In this paper, according to the different characteristics of Internet and mobile network, we analyzed the mobile Internet service development demands and gave a technical network framework to meet these demands. We also put forward technical solutions to try to realize the network framework.

Research on Essential Factors About Operation of Mobile Internet and Business Model

Xue Lihong,Zhang Yunhua and Cao Min

2009, 25(5):  11-17. 

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The thesis focuses on the challenges that mobile Internet brings to telecom operators, including content, price, cooperation, user interface, network and terminal. It proposes a smart-pipe model based on discussing several different business models.

Research on the Application of Mobile Widget Technology in the Mobile Value-Added Services

Ni Ganfeng,Xue Lihong and Gong Xuefeng

2009, 25(5):  17-21. 

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Widget technology is one of the most popular technologies in Web2.0 times. With the coming times of the mobile Internet, the Widget technology which was combined of the mobile technology will be got an enormous development. In this article, the advantage of Widget technology is analyzed, which was combined with the introduction of Widget technology and the analysis of the characteristics of the mobile value-added business. Based on the advantage of Widget technology, the mobile Widget technology is researched in the mobile value-added services in this article.

Research on System Architecture and Key Technologies of Mobile eBook Reading System

Tong Jiangang,Zhu Lifang and Zhu Zhe

2009, 25(5):  22-26. 

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The mobile ebook reading system is known as one of killer applications in 3G mobile network. Based on the analysis of the architecture and function requirements of the MEBRS, this thesis discussed the structure of ebook document, the interface between platform with reading terminal and DRM solutions in MEBRS. It may make solid technical foundations for the MEBRS design.

A Solution of Arrearages Control in Mobile Internet

Diao Yanrong,Zhou Feng and Shi Fangyan

2009, 25(5):  27-31. 

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There are a large number of high-value services and high risk of arrearages in mobile Internet. A solution based on 3GPP online charging system concept is purposed, describing CDMA network construction. It provides a effective solution to reduce arrearages in communication system.

Discussion on Operating Mode and Co-Operation Strategy of Mobile Game

Gong Jing and Wu Jianjiang

2009, 25(5):  31-35. 

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As the 3G era, mobile data network bandwidth and services upgraded provide the possibility of mobile game becoming the next killer application, Chinese mobile phone games as the next Internet gold mine is located. Based on the mobile game industry value chain analysis, the mobile telecommunications operators in the game industry chain positioning, business model and strategy are recommended.

A Fixed Mobile Convergence Solution Based on SIP/Wi-Fi

Xu Longjie,Zhang Zhengfeng and Xue Lihong

2009, 25(5):  36-39. 

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This paper proposes a fixed mobile convergence solution based on SIP——a CDMA network convergence solution based on SIP/Wi-Fi, and details the principle of this solution.

Scheduling Based on Multirate Transmission in Wireless Ad Hoc Network

Wang Qi,Han Jianghong,Wang Qingshan and Lu Yang

2009, 25(5):  40-44. 

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This paper studies the multirate scheduling in wireless Ad-Hoc network. Firstly, we formulate it as an optimization problem. Moreover, the HRFWICB (highest rate first without considering buffer) algorithm and the HRFWCB (highest rate first with considering buffer) algorithm are present. Their main idea is scheduling prior the flow with higher transmission rate to decrease the transmission time and delay subject to that the minimum channel allocation for each flow is guaranteed. Finally the simulations are performed to compare our algorithms with Luo algorithm and GPPF(greatest potential packet first) algorithm. The result shows our algorithms can greatly decrease the transmission time and delay.

Analysis and Design of MSTP Service Management System

Xu Nan and Xiong Ao

2009, 25(5):  45-49. 

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This paper analyzed the network features and management needs of MSTP network, and raised objectives for MSTP service management system， discussed the system design based on norms. Through correlation analysis for the service and network element equipment, the system realized the business view management, and it implemented the service alarm management and the performance management on the basis of business view management. We presented the generic SLA templates and the performance indicator algorithm for MSTP. It was in application of actual network for some domestic large-scale operator.

Framework of Broadband Satellite Wireless Access System Based on DVB-RCS and WiMAX

Qin Yong,Zhang Jun and Zhang Tao

2009, 25(5):  50-55. 

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Satellite broadband communications have become one of hot issues. The existing satellite wireless access standard DVB-RCS is concentrated on physical layer technique criterions, however, a systemic framework of satellite broadband access system has not been proposed. This paper analyzes requirements and characteristics of satellite broadband access system, and a functional framework of which is also proposed based on the DVB-RCS standard and WiMAX terrestrial broadband access technique. Furthermore, the designing and realization methods of main functions of this proposed framework are researched.

Study of the Relay Selection Algorithm for Cooperative Diversity

Qin Qin,Zeng Zhimin and Zhang Tiankui

2009, 25(5):  56-61. 

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In recent years there has been an increasing focus on the cooperative diversity in wireless communications, the reasonable selection of the relay in cooperative communications can give high-gain. In this paper, we introduce the choose of cooperative timing and the form of cooperative relation, focused on three main methods of relay selection: location-based information, based on the average received signal to noise ratio and based on the instantaneous state channel relay selection algorithm, and then give an analysis and comparison to these methods.

Research on Detection Methods of CC Attack

Chen Zhonghua,Zhang Lianying and Wang Xiaoming

2009, 25(5):  62-65. 

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At first, the paper introduces the basis, action and character of CC attack，then summarizes three traditional ways based on code optimization of Website of detect this attack action, and raises two new detection methods based on carrier network.

Setting End to End Quality of Service in IPTV Content Distributing Network

Guo Feng

2009, 25(5):  66-70. 

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Setting end to end quality of service in IPTV content delivery network is very meaningful in reality, and its effect monitoring and management have new features. We study the IPTV content distributing network of carrier and analyse different methods of QoS, which is focused on network layer and data link layer in OSI model. Then combined with backbone, MAN, access network and STB, we advise the proper methods of QoS for keeping the transmitting consistency. At last, we provide the demands on daily effect monitoring. All of the principles and methods are fit with the real network and have the value of extending in complex IP network.

Application and Research of Trusted Computing Technology on Hierachical Protection

Wang Lifang and Li Xu

2009, 25(5):  71-74. 

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A series of national standards about hierachical protection refer to the boundary of secure area must be explicit in classified information system, communication between different grade areas must be in control, and the system should be realized identity discrimination, classification level as information security requirement and so on. Facing these safe demand, this paper is applied on active label, safety isolation and unequal access control technology based on trusted computing technology, begin from the hardware first floor, build the trust relation among user, platform and network. So it realizes trusted interconnection among terminals or network areas of different security level.

An Architecture Design and Services Implement for Mobile Best Tone WAP Portal

Li Qing

2009, 25(5):  75-80. 

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The paper firstly analyses and designs the China Telecom Best Tone WAP portal framework, then gives a hierarchy and modularization software architecture, and finally describes in detail the network organization forms for Best Tone services, the way of symbol WAP services implement, and so on. It will provide a useful reference for the future provincial-level sub WAP portal construction and localization characteristics services development.

A Deception Attack Problem and Its Security Solution in Cognitive Radio Network

Xue Nan,Zhou Xianwei and Zhou Jian

2009, 25(5):  81-85. 

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Because of the characteristics of the dynamic spectrum in cognitive radio, a special security problem of deception attack is proposed. In the distributed cognitive radio networks, cognitive nodes perform routing setup using on-demand routing protocol, malicious nodes can launch attack by adding false spectrum information to route request packet and making other nodes to reject data packet which need to be transmitted. In order to solve this security problem, cognitive radio networks are divided into single-hop clustering structure, and cluster-head is designed to detect malicious nodes. The paper designs a routing protocol by combining with cluster-head detect, which proved to be feasible and reliable for data transmission. Theoretical analysis and experimental simulation show that the security issues can significantly reduce the network performance, and the proposed solution is with security and feasibility.

Research on ICT Transition Strategy of Telecom Operators

Jian Jie and Liang Peng

2009, 25(5):  86-88. 

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In order to meet the fierce competition in telecom market, telecom operators begin to transition from basic network operator to information and communications technology service operator. This paper analyzes China’s major telecom operators transition strategy before and after the reorganization of Telecom, and puts forward new advices for telecom operators in new situation.

Research on Cell Search in MIMO OFDM System

Wang Xianhua,He Genhong and Hao Donglai

2009, 25(5):  89-93. 

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Based on the research of OFDMA technique, this paper study the cell search arithmetic in LTE frame. Cell search scheme and flow is proposed， simulation result in multi antenna mode shows the better performance of the scheme proposed in the paper. At the final, the author summarizes the main work .