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15 March 2010, Volume 26 Issue 3

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Thinking on Three Network Convergence

Leping Wei

2010, 26(3):  1-6.  doi:10.3969/j.issn.1000-0801.2010.03.001

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Based on latest development of three network convergence in China,the article discuses connotation,characteristics and trends,meaning,targets,loss and gain for each party,service forms of three network convergence.Finally,the article analysis major challenges,keys to success and promotions proposals.

Topic: mobile Internet terminal technology

Open-Source Mobile Terminal Software Stack Based on Linux

Xuan Luo,Weiping Lin,Yuhua Chen,Junbiao Pan

2010, 26(3):  7-15.  doi:10.3969/j.issn.1000-0801.2010.03.003

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This paper analyzes the Linux open-source community's foremost mobile device software stack,from the graphics and GUI application framework,multimedia framework,inter-process communication,telephony communication modules,then summarizes a variety of application architectures.

Research on Moblin——A New Generation of Mobile Platform

Yingqi Wei,Shaolong Yang,Lihui Chen

2010, 26(3):  16-21.  doi:10.3969/j.issn.1000-0801.2010.03.005

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According to analyzing the evolution of mobile terminal ecosystem and mobile applications,this article introduces the architecture of moblin,a new generation of intelligent handset platform.Following open source Linux,moblin has its special characteristics,powerful development toolkits and strong potential in the field of handheld mobile communication terminals.

Status and Development Trend Analysis of Cloud Computing Terminal

Weibin Zhong,Liangyue Zhou,Junbiao Pan,Jinjun Wen

2010, 26(3):  22-26.  doi:10.3969/j.issn.1000-0801.2010.03.006

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This paper divides cloud computing terminals into two categories,according to the terminal requirements analysis of cloud computing.Then analyzes the status and development trend of cloud computing terminal.

Research on Catching Intention in User Operation Based on Terminal Input Method Engine

Shaolong Yang,Weibin Zhong,Huiyun Li,Yingqi Wei

2010, 26(3):  26-30.  doi:10.3969/j.issn.1000-0801.2010.03.007

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This article enumerates problems of human-machine interface design on mobile phones on the market,and proposes an effective solution——the user intention smart sensing technology which based on IME（input method engine）.Its overall technology roadmap,core technology architecture,keyword sensing,quick positioning for phone numbers and softwares are analyzed in detail.

Discussion on Integrating 2G Voice Communication and 3G Video Service

Ying Li,Yingqi Wei,Hua Tan,Yue Huang

2010, 26(3):  31-34.  doi:10.3969/j.issn.1000-0801.2010.03.009

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This paper analyzed briefly the necessity of 2G and 3G coexistence,introduced the required conditions of 2G and 3G business converged.Then,from the perspective of the users' experience,analyzed the specific use of strategies of 2G voice communication and 3G video services in detail,and analyzed the current problems.

research and development

A Survey of Detect and Avoid Technology of Dynamic Spectrum Access

Ying Shi,Maoliu Lin

2010, 26(3):  35-40.  doi:10.3969/j.issn.1000-0801.2010.03.011

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Due to efficiently solve spectrum resource shortage and low spectrum utilization rate problems,dynamic spectrum access has become a research focus.It can allow the unlicensed users to dynamically share the spectrum that is not used by the primary licensed users without interference by means of dynamic radio frequency spectrum management policy.This paper presents a comprehensive survey on the detecting and avoiding technology of dynamic spectrum access.Their primary virtues and deficiencies are also analyzed and discussed.Some problems worthy of further study and probably developing trends in the dynamic spectrum access field are presented.

Channel Estimation for EV-DO Forward Link Pilot Slots

Qiang Wang,Daming Wang,Xinran Zhang,Chao Wang

2010, 26(3):  41-45.  doi:10.3969/j.issn.1000-0801.2010.03.012

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The pilot channel data of cdma2000 1x EV-DO forward link is delivered in burst mode.The data slots are idle and the tracking loop is disturbed without any users,therefore in the next adjacent data slot,the phase of PN code and frequency offset change,what's more,the short burst length of pilot data deserves more precise channel estimation.Based on the summary of every kind of channel estimation algorithms,the advantages and disadvantages are analyzed,and the suitable environment is given,and the algorithms in common use are simulated,and the compared results are given,hence this paper provides a reference for the hardware realization of channel estimation.

Optimizing Network Anomalous Detection Via Heavy Hitter Identification

Yu Zhang,Lei Dai

2010, 26(3):  46-51.  doi:10.3969/j.issn.1000-0801.2010.03.013

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In this paper,we propose a network anomalous detection optimizing method via heavy hitter flow identification.Experimental results demonstrate that the proposed method is actually effective and lightweight for heavy hitter flow identification and can benefit large-scale network anomaly detection,mitigate performance stress.

Testing Method for Routers of Network-on-Chip

Yiming Ouyang,Yun Qi,Huaguo Liang

2010, 26(3):  52-57.  doi:10.3969/j.issn.1000-0801.2010.03.014

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In this paper,we present two kinds of improved methods to test the architecture of network on chip,base on the conclusion of the methods of multicast.Experiment shows that,as size of the chip increasesing,these two improved methods have less test time and less number of packets than the method of multicast.And the larger that the size of chip increases,the more obvious the advantages.In the two improved methods,the latter is better than the earlier.

Mobile Video Quality Evaluation Methods and Its Development

Yaodu Wei,Xiang Xie,Li Huang,Jingming Kuang

2010, 26(3):  57-63.  doi:10.3969/j.issn.1000-0801.2010.03.015

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The evaluation of mobile video quality is already a important issue in the 3G era.First we analyzed the impact of wireless transmission on video quality.The existing subjective and objective video quality assessment methods are introduced afterward,the inadequacy of the current methods are also pointed out.At last,we predict the future development of mobile video quality evaluation methods.

Mobile Video Quality Evaluation Methods and Its Development

Wei Yaodu,Xie Xiang,Kuang Jingming and Huang Li

2010, 26(3):  58-63. 

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The evaluation of mobile video quality is already a important issue in the 3G era. First we analyzed the impact of wireless transmission on video quality. The existing subjective and objective video quality assessment methods are introduced afterward, the inadequacy of the current methods are also pointed out. At last, we predict the future development of mobile video quality evaluation methods.

Discussion of Application on Speech Synthesis Technology in Intelligent Voice Broadcast System

Shuifei Zeng,Renbo Wang

2010, 26(3):  64-68.  doi:10.3969/j.issn.1000-0801.2010.03.017

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This article first describes the limitations of traditional man-made broadcast,and then combines experience in business operation.This paper focuses on analysis how to use the speech synthesis technology to design the structure,system function and main business process of intelligent voice broadcast system,giving the the corresponding recommendations at the same time.

Service-Oriented Approach to Bandwidth Allocation for Mobile Data Service

Wenxiao Shi,Shaoshuai Fan,Nan Wang

2010, 26(3):  68-73.  doi:10.3969/j.issn.1000-0801.2010.03.018

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Aiming at solving the problem that no service-oriented bandwidth allocation strategy was deployed for mobile data service in core network,a service-oriented approach to bandwidth allocation based on GGSN was proposed.The approach achieved the service-oriented bandwidth allocation for mobile data service making use of the bandwidth demands of different services derived from the FBM traffic model and the G/D/1（n）queuing model,combined with the function of GGSN equipment and the situation of bandwidth resources.Theoretical analysis and simulation results indicate that the proposed approach can effectively classify the quality of different services and guarantee the bandwidth demands of high-value services.

Study on Rescuer Physiological Status Monitoring and Positioning System

Li Yu,Yong Guo,Wugang Lai,Ying Xu

2010, 26(3):  74-78.  doi:10.3969/j.issn.1000-0801.2010.03.020

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The long distance wireless physiological monitor and positioning system for search and rescue mission was researched in this paper.At first,physiological and environmental information data such as pulse、body temperature and natural gasˊsconcentration can be collected and initial processed by sensors data acquisition circuits,then data is sampled and interrupt control processed by passing to MCU.By way of transmission to remote host through wireless network,the data is analyzed and judged finally,thereby,rescuerˊs dynamic physiological state can be monitored in real-time.