Current Issue

15 August 2011, Volume 27 Issue 8

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Project：the mobile Internet market and business operations

Research on Business Model Transform of International Carriers' Traffic Operation Strategies

Jie Song,Min Zhang

2011, 27(8):  1-5.  doi:10.3969/j.issn.1000-0801.2011.08.001

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The rapid development of mobile Internet,explosive growth of smart terminal,and the emerging mobile services,brings huge traffic to telecom operators.At the same time,telecom operators can not achieved synchronous growth.The scissors movement between operators' revenue and cost become increasingly evident.Therefore,international carriers have taken various measures to cope with traffic growth,and try to enhance the value of traffic.This paper analyzes the traffic operation strategies of international carriers,and proposes the CTR model of traffic operations for the domestic telecom operators to provide reference to business model transformation.

Analysis of Overseas Operators'Mobile Broadband Pricing Strategies

Jianjun Liang

2011, 27(8):  6-10.  doi:10.3969/j.issn.1000-0801.2011.08.002

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With mobile data traffic explode,many operators are deploying new mobile broadband pricing models to increase ARPU,such as tiered pricing and speed-based pricing.Next step,when the intelligent network technology are widely used,operators will redesign the pricing mechanisms,base on the “fair usage policy”to build a new pricing model and meet user needs.This article analyzes overseas operators' case and mobile broadband pricing trend,provides reference for domestic operators to adjust mobile broadband pricing strategy.

Research on Platform Garden Building of Carriers With IM and SNS as the Key Elements

Min Zhang,Jie Song

2011, 27(8):  16-20.  doi:10.3969/j.issn.1000-0801.2011.08.005

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IM and SNS are the key elements to maintain users in mobile Internet era,and Internet companies are developing social application platforms integrated with IM and SNS abilities one by one.This article analyzes the trend,proposes a solution for carriers to build platform garden with IM and SNS as the key elements to take up challenges from Internet companies,and avoid becoming dumb pipe.

Discusses on Mobile Internet Product Operation Evaluation Index System Based on User Experience

Tingquan Zhang

2011, 27(8):  21-24.  doi:10.3969/j.issn.1000-0801.2011.08.006

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Mobile Internet products are significantly different with the traditional telecommunication products in product characteristics,marketing and sales mode,etc。How to get rid of path dependence of thinking mode and build a scientific evaluation index system of mobile Internet products,is a new topic to the traditional telecom carrier.Based on the analysises of mobile Internet product characteristics,the paper puts forward the mobile Internet product operation evaluation index system based on user experience and consisting of product assessment,operation assessment,marketing assessment,performance assessment,and then gives corresponding application suggestions.

research and development

Research on Prediction Method of the Amount of Customers in Telecom Services Tariff Preview

Danhua Jia,Runrun Wang,Peng Wang

2011, 27(8):  25-32.  doi:10.3969/j.issn.1000-0801.2011.08.007.7

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With the use of theories and methods of statistics and data mining,this paper researched the prediction method of the amount of the new customers（which take this new network service packages the first time）and the transfer customers（which have ever chosen the original network service packages）.The amount of new customers could be predicted according to time series method based the historical data of a similar package,and the amount of transfer customers could be predicted with the finding to the rules of customer change service packages through data mining。Finally,a case study of a telecom operator was carried out in the paper.Linear regression analysis and exponential smoothing method were used and compared in the establishment of prediction model of amount of the new customers,and decision tree algorithm was used to find the rules of customer change service packages.

A Malware Propagation Model With GAF-Based Clustering in Wireless Sensor Network

Xiaoping Su,Yurong Song,Qin Shen,Jungang Lou

2011, 27(8):  33-38.  doi:10.3969/j.issn.1000-0801.2011.08.009

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Wireless sensor network （WSN）is often deployed in open environment,and uses wireless channel for data transmission,so the security in the network is very important.A SIR （susceptible-infected-recovered）model for malware propagation based on 2-Dcellular automata is proposed.Malware propagation in GAF-based clustering WSN is discussed.Analysis and simulation results show that the clustering WSN still process spatial localization,and clustering can reduce the energy consumption of each sensor node at the same time effectively restrain the malware propagation.It also shows that malware propagation will be accelerated in the cluster head selecting period.

ε-Global Optimal Multiple Relay Selection Scheme for Dual-Hop Amplify-and-Forward Relay Networks

Jiali Xu,Haixia Zhang,Dongfeng Yuan

2011, 27(8):  39-44.  doi:10.3969/j.issn.1000-0801.2011.08.010

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This paper studies the problem of multiple relay selection in multiple parallel dual-hop amplify-and-forward（AF） relay networks.The problem is first formulated as a nonlinear integer programming （NLIP）problem,with the objective of maximizing signal-to-noise ratio（SNR）at destination node.This problem is NP-hard and optimal solution via exhaustive scheme is obviously time-inefficient for its intolerable exponential complexity.Then,a ε-global optimal solution algorithm based on a branch-and-bound architecture is proposed to resolve the NLIP problem with the employment the reformulation-linearization technique（RLT）.Numerical results indicate that the proposed algorithm can achieve global optimal solution with predefined accuracy ε.The solution via this proposed algorithm can work as a benchmark for other algorithms.

Ressearch and development

A Survey of Analysis of Micro-Payment Mechanism and Improvement Mechanism Based on Pay Word

Fangwei Li,Shaojun Yan

2011, 27(8):  45-49.  doi:10.3969/j.issn.1000-0801.2011.08.011

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This paper surveys the micro-payment system of electronic payment based on Pay Word.Pay Word protocol is concretely analyzed and the advantages and disadvantages of this protocol are pointed out.Some representative improved protocols based on Pay Word are detailedly classified according to the improved aspect.Finally,this paper gives a discussion on the problem in this field and the future research directions.

Complex Context-Aware Composition Service Selection Framework

Tongguang Zhang,Qingmin Shi,Longchang Zhang,Hongliang Su

2011, 27(8):  50-57.  doi:10.3969/j.issn.1000-0801.2011.08.013

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In ubiquitous network environment,not only the Web Service context but also user's context is taken into account in composition selection.And the data type describing context attribute may be real number,interval number,triangular fuzzy number and intuitionistic fuzzy number.To address the difficulty of based on complex context composition service selection this paper presents a complex context-aware composition service selection framework.It can aware service context and user context.The framework is based on the design of intelligent agents,in which the client frameworks complete the user's context management,server frameworks complete service context management and composition service selection.By comparing with the related works,the advantages and effectiveness of our approach is demonstrated.

Research and Implementation of Stream-Path Binded Concurrent Multipath SCTP

Xiaodan Wu,Yajuan Qin

2011, 27(8):  58-62.  doi:10.3969/j.issn.1000-0801.2011.08.015

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The growing availability of multiple network interfaces on communication terminals makes concurrent multipath transfer（CMT）an appealing option to improve the performance of multiple applications.In this paper,we propose an enhanced CMT which can avoid receive buffer blocking,which aims at binding one of the multiple data streams with one of the multiple paths,the certain data stream can only be transferred on the certain path.

A Power Control Algorithm Based on Repeated Games in Cognitive Radio

Zhijun Teng,Xue Han,Xu Yang

2011, 27(8):  63-67.  doi:10.3969/j.issn.1000-0801.2011.08.016

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This article proposes a game theoretic solution for power control policy in cognitive radio networks.A power control game algorithm is proposed based on cost function.The uniqueness and existence of the Nash equilibrium is proved for the scheme.Simulation results show that the novel power control algorithm based on game theory will be obtained better convergence compared with traditional algorithm,after about 7 iterations algorithm will converge to an NE and can satisfy the real-time requirement,the novel algorithm can regulate their transmitter powers to meet the different signal to interference ratio（SIR） requirements and the performance of CR system is thereby improved obviously.

BIST for Network-on-Chip Communication Architecture

Yiming Ouyang,Liyi Niu,Huaguo Liang

2011, 27(8):  68-73.  doi:10.3969/j.issn.1000-0801.2011.08.017

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Network-on-chip communication architecture need be tested for ensuring proper communication between the IP cores in NoC.Against functional test for the mesh NoC,BIST for NoC communication architecture was proposed in the paper.The method need add BIST modules in NI,which were test pattern generator（TPG）and test response analyzer（TRA）,exploit TPG to generate test data and TRA to capture response in order to achieve test.The result shows that,the method,in the case of smaller area overhead,can reduce test cost and time.

Design of a Novel Planar Ultra-Wideband Antenna

Hongmei Zhao,Xiang Tian,Liping Lu

2011, 27(8):  74-78.  doi:10.3969/j.issn.1000-0801.2011.08.018

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A microstrip-fed novel planar ultra-wideband monopole antenna with a metal patch of arc side and a notched ground plate is proposed.A notch of semicircle unite isosceles trapezoid structure divided the ground into two coupled parts,the antenna impedance matching and bandwidth have been enhanced.The simulation results show that return loss＜-10 dB bandwidth covers a frequency range between 3 GHz and 11.8 GHz.And the frequency range that VSWR＜1.5 is between 3.4 GHz and 11.2 GHz,with good omni-directional radiation performance.This type of antenna is simple in structure,small in size,suitable for UWB communications.

Applications of Dual-Reject-Bands Single Negative Metamaterials in Band-Pass Filter Design

Weiping Cao,Guanghua Lin,Simin Li,Huijuan Liu

2011, 27(8):  79-83.  doi:10.3969/j.issn.1000-0801.2011.08.019

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A novel single negative metamaterials with dual reject-bands is proposed.Based on the analysis of the equivalent circuit model of the metamaterials unit cell and the extraction of its electromagnetic parameters using the S-parameter retrieval method，the band-stop characteristic of the metamaterials and the validity of the equivalent circuit model are demonstrated.And then the impacts of the structural parameters are investigated.By utilizing the metamaterials a waveguide band-pass filter is designed at the center frequency of 9.6 GHz，which has its advantages with compacter size（25 mm ×22.86 mm ×10.16 mm），higher selectivity and lower transmission loss（0.15 dB），comparing with the ones based on ordinary material.

Optimization Implementation of Video Decoder Based on General DSP

Jianbin Song,Shubo Zhan,Li Ma

2011, 27(8):  84-88.  doi:10.3969/j.issn.1000-0801.2011.08.020

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With the development of the multimedia and network technology,video applications such as VOD,video-phone etc.are used more and more widely in our life.We implement and optimize the MPEG-4 decoder based on TMS320 c6416 DSP for its high performance and easy implementation.Based on the architecture and instruction characteristic of the DSP,structure-level,program-level,code-level optimization was conducted respectively.Experimental data show that the decoder implemented can decode video in real time efficiently.

A DT-Based Active Queue Management Algorithm

Yan Long

2011, 27(8):  89-94.  doi:10.3969/j.issn.1000-0801.2011.08.022

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One improved method of active queue management algorithm was presented in this paper.Aiming the shortcoming of parameter setting in BLUE,the paper improved BLUE through introducing into dynamic threshold algorithm.The simulation results demonstrate that the proposed approach can effectively stabilize the queue occupation at a level and mitigate the queue overflow and underflow,and it can improve link utilization.

Research on Technical Development and Application Analysis of POF

Peng Chen

2011, 27(8):  94-100.  doi:10.3969/j.issn.1000-0801.2011.08.023

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Plastic optical fiber（POF）now has become a hot in optical fiber communication technology research,due to price and performance advantages.It has broad prospects in all optical network to access the application in the home.This paper analyzes the development status,technical progress and market structure of the global plastic optical fiber,and introduces some foreign classic application cases,analyzes plastic optical fiber trends and outlooks future prospects of Chinaˊs market.

Research Situation on Key Technologies of Data Gathering in Wireless Sensor Networks

Minghui Yu,Shunxian Zhou

2011, 27(8):  101-107.  doi:10.3969/j.issn.1000-0801.2011.08.024

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The wireless sensor network is a kind of network that use data as its center.It has some characteristic such as the limitation of the hardware resource,self-organization network structure and the variability of network.So there are some difference between the wireless sensor network and traditional wireless network.And that decided the data gathering is the major research subject of the wireless sensor network.This paper introduced the structure and the function of data gathering system in the wireless sensor network,summarized the key problem and the key technologies of the data gathering in the wireless sensor network,analyzed and summarized the research situation of some key technologies such as routing protocol,security mechanism,data compression and data fusion,and the paper also look into the future of the data gathering technology in the wireless sensor network.

Observation and communication

Research of Business Mode of the Internet of Things Industry Based on Value Network Theory

Bing Liu,Yiwei Huang

2011, 27(8):  108-111.  doi:10.3969/j.issn.1000-0801.2011.08.025

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The Internet of things has gathered more and more attention because of its huge prospective of application,using business mode and the theory of value network to construct the Internet of thingsˊ value network model,focusing more on the value creation process of the Internet of things,hoping to increase the whole competition ability of our countryˊs Internet of things industry and the value chains' enterprises.

Operational support technology innovation forum

Research on IT Support Model of Marking Based on Mobile Value-Added Service

Qing Zhang,Chun Liu

2011, 27(8):  112-116.  doi:10.3969/j.issn.1000-0801.2011.08.026

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With the development of the mobile Internet,mobile value-added service as the main body of information consumption,become the more and more important business income source and business growth for telecom operators.Compared with the traditional telecom service,mobile value-added service products with a small group and diversified marketing positioning,maybe increase the difficulty of marketing.In this article,through the analysis of existing mobile value-added service marketing model and existing problems,one technology solution for various business scene of value-added services and the whole process of the closed-loop management of IT support mode are proposed.It provides a new,fusional IT support idea for mobile value-added service marketing.

Research of Integrated Sharing Platform Program

Wen Zhang,Yi Zhang,Yi Man,Xiaofeng Chen

2011, 27(8):  117-121.  doi:10.3969/j.issn.1000-0801.2011.08.027

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This paper describes an integrated sharing platform,it offers a variety of external basic interfaces which can be extended to accommodate a variety of different interfaces of applications.It enables multiple systems to call a variety of services each other,improves service management,meanwhile leads to the accessibility of information interaction.When a new interface protocol is appearing,for the described platform,it just needs to develop a new interface protocol adapter to complete the access of new interface,improving the efficiency of the platform development,reducing development and maintenance costs.The platform changes the application of the traditional point-to-point way into a many-to-many bus mode,to achieve a simple and convenient information interaction of the various systems,optimizes the structure of the systems,makes it easy to manage and maintain,reduces the transformation of the interface which accesses to the systems.

Operation and Application

Study on the Adaptability of Streaming Media Service to Bearer Bandwidth in Mobile Telecommunication Network

Yongqiang Wang

2011, 27(8):  122-126.  doi:10.3969/j.issn.1000-0801.2011.08.028

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The popularity of video sites,like YouTube,Youku and XunleiKankan which are based on streaming media technology announced the era of streaming media.However,since the mobile telecommunication network's transmission environment is uncertain,it cannot sustain consistently effective bandwidth and guarantee overall high performance of the streaming media service.Based on the standards of streaming media service,this piece of study aims to deliver a methodology that could inform the streaming media service platform with the mobile network wireless link real-time bandwidth based on mobile core network signaling protocol.Then streaming media platform can adjust the encoding rate of streaming media according to current bandwidth,in order to save net resources and improve users' experience.