最新刊期
卷 30 ， 期 2 ， 2014
- 摘要：Cognitive radio network（CRN）is a cognitive process of network，which makes planning，decision and response for network state through learning and analysis of the network environment.CRN is one of the effective ways to solve the limited network capacity，and to satisfy the national strategic demand on the frequency spectrum efficient-utilization and the integration of heterogeneous networks.As the key technology of 5G，CRN indicates the direction for the future development of wireless communication network.The system architecture for cognitive radio networks，the basic theory research，the key technologies of implementation were introduced，and the demonstration platform of CRN was presented.关键词：cognitive radio network;cognition flow;resource flow;network architecture;multi-domain cognition;autonomous decision;autonomous transmission;reconfiguration881|2846|0更新时间：2024-06-05
- 摘要：Aiming at the main features of the information content security incidents and telecommunication network themselves，a design of situation awareness model was presented.The model using distributed character data collection and hierarchical progressive integration，the status of security situation of the whole telecommunication network was analyzed.According to the structure of model，hierarchical information fusion proximate calculation based on evidence theory was used to resolve the problem of how to use the initial information to determine the probability in high level information fusion.The simulation results show that the model can compute fast in real time in high accuracy，and it can perceive and determine the incidents effectively.关键词：telecommunication network;situation awareness;evidence theory;proximate calculation;matrix;belief and plausibility interval720|1584|0更新时间：2024-06-05
- 摘要：Firstly，a kind of grid resource management model——super-peer model was proposed.For this model，economic mechanism was introduced，allowing a grid user to put forward the task’s expected execution deadline，cost limit and the weight parameters between them.Those are the QoS parameters of application-level.Then，a corresponding resource scheduling algorithm was shown.Next，hierarchical colored Petri net and price timed Petri net were used to model and the dynamic process of grid resource scheduling was simulated.Lastly，reachable task graph（RTG）of Petri net model was constructed and the system’s scheduling performance was analyzed，such as throughout capacity，load-balancing，scheduling time and cost through an example.关键词：grid scheduling;QoS parameter;Petri net483|1034|0更新时间：2024-06-05
- 摘要：A hybrid resources search mechanism based on the popularity of resources was proposed in the hybrid peer to peer stream media system based on CDN and P2P.A different search mechanism was used according to the different popularity of resources，such as structured search or flooding.By this way，the efficient of search was effectively improved.In the part of structured search，an improved Chord search mechanism was proposed.Compared with the traditional Chord search mechanism，the router delay was greatly reduced.A flooding search mechanism based on bloom filter was proposed in the part of flooding.Compared with the traditional flooding search mechanism，it can significantly lower the redundancy transmission of search request.Also，according to the different popularity of resources，multi-keyword query and the concept of semantic correlation were proposed to support fuzzy search，and the rate of successful search was greatly increased.关键词：resources popularity;structured search;flooding search;bloom filter;fuzzy search335|537|0更新时间：2024-06-05
- 摘要：By collaborating with each other，nodes in mobile wireless sensor network（MWSN）can filter，calculate and composite the data so as to provide it in forms of services to different users.However，due to the uncertain moving behavior and the limited wireless transmission，executing services in MWSN has to consider the time needed in nodes executing their services，and the physical region in which two nodes can communicate with each other by wireless channel.Probabilistic methods were used to define and predict the uncertain moving behavior of each node，and then the reliability was measured that two nodes can successfully communicate with each other under their wireless transmission range during a certain time period in the future.An approximate approach based on Monte Carlo simulation was also given to calculate nodes’ motions and the reliabilities of their successful communications.By consider the thresholds of execution time and the reliabilities of nodes’ successful communications，two algorithms were given to make the scheme of selecting nodes executing a group of services provided by the users，one using the approach of completely searching and one adopting the Pareto-dominated local k-th optimized method.Finally，experimented were conducted to evaluate our methods.关键词：mobile wireless sensor network;communication reliability;motion prediction;service execution304|508|0更新时间：2024-06-05
- 摘要：Enlightened by web page hyperlink，a novel abstraction“data service hyperlink”for linking and integrating data was proposed.With the help of “data service hyperlink”，users can explicitly describe the relationship between data sources.Based on data service hyperlink，the approach to just-in-time data service construction was proposed to enable users integrate data while navigating data services.A data service hyperlink recommendation algorithm was also discussed to help users select proper data service hyperlink to deal with the temporary requirements.A case-study and some experiments how to build a situational data integration application based on data service hyperlink efficiently were presented.关键词：data service;service hyperlink;service recommendation;situational data integration345|665|0更新时间：2024-06-05
- 摘要：A call admission control based on resource sharing in LTE-Advanced relay system was proposed.If the shared resources of the target site for new users and handover users are used up，handover users can use the reserved r esources of the target site for handover users to access system，while new users can access system by resource sharing between the sites in the cell which the target site inside.Simulation results show that compared the proposed algorithm with LTE-Advanced system on fixed bandwidth reservation scheme and LTE-Advanced relay system on fixed bandwidth reservation scheme，the proposed algorithm can effectively reduce the blocking probability of new users and dropping probability of handover users in the cell，and can improve the system resource utilization.关键词：LTE-Advanced;call admission control;resource sharing;relay268|412|0更新时间：2024-06-05
- 摘要：In order to effectively deal with the massive image and video data in internet，a solution for image classification and annotation based on Hadoop cloud platform was proposed.Firstly，a system based on cloud computing was given to crawl the raw data image from WWW.Secondly，a training image extractor based on pLSA （probabilistic latent semantic analysis）was presented to help users to get training set images effectively.Thirdly，the SVM model for the system was integrated，which could be used to classify or annotate novel images.According to the experiment，the system can both meet the functional requirement and achieve optimized performance for image data classification and annotation.关键词：cloud computing;training set extraction;support vector machine;visual feature extraction318|706|0更新时间：2024-06-05
- 摘要：To improve the feasibility of virtual node mapping，grounded on feasibility test theorem and node rank indicators used to measure node availability，the virtual network mapping iterative algorithm based on K-best perfect matchings of bipartite graph was proposed，aiming at reducing mapping cost.Experiment shows that the proposed algorithm increases virtual network construction request acceptance ratio and benefit cost ratio，and hence can improve profit of physical network service provider.关键词：virtual node mapping;node rank;feasibility test theorem;K-best perfect matchings of bipartite graph281|896|0更新时间：2024-06-05
- 摘要：In view of the problem of modulation recognition algorithm existing about low recognition rate under environment condition of low SNR，the algorithm of first-order cyclic moment was first presented used in band signal of VHF modulation classification recognition.The first-order cycle frequencies at which estimated first-order cyclic moment magnitudes exceed the cut-off value were selected as candidate cycle frequencies based on estimation first-order cyclic moment at first-order cycle frequency series，then decided to choose the number of candidate cycle frequency by a cyclostationarity test to realize signal modulation classification recognition.The classification recognition rate can reach more than 98% under condition of SNR is greater than -6 dB.关键词：first-order cycle frequency;first-order cyclic moment magnitude;cut-off value;band of VHF;modulation classification recognition371|685|0更新时间：2024-06-05
- 摘要：As cloud computing enters the mainstream，the numbers of virtual machine in one cloud pool is becoming more and more.So，how to quickly and cheaply migrate virtual machines between different hosts for load balance and power savings is becoming one of the hot and tough problems in this filed for the researchers.A distributed storage system was presented，which was called IFSpool.The system was based on Lustre and was designed to achieve the following three goals：high capacity and high extensibility to support thousands of VM images，high I/O throughput for data access，and booting optimization for boot storm.IFSpool combined a queue mechanism and a cache mechanism in a seamless way，to improve I/O throughput and lighten the boot storm by coordinating data access order.The I/O bandwidth and storage capacity of IFSpool can be easily aggregated and extended by adding storage nodes and servers dynamically.The experimental results show that IFSpool is effective and efficient for VM migration.关键词：image file store;cloud computing;virtualization;data storage;Lustre;I/O dispatch272|509|0更新时间：2024-06-05
research and development
- 摘要：The feature and performance of the representative optical network architectures were reviewed，and a novel PIONEER architecture that combines their advantages was proposed.Finally，programmable，scalable and upgradable software defined optical network（SDON）architectures were proposed for future optical networks.关键词：automatic switched optical network;path computation element;software defined optical network;heterogeneous network inter-connection450|1357|0更新时间：2024-06-05
- 摘要：Data center network has faced several challenges from the arising of cloud computing.Along with the continuous expansive bandwidth requirements，data center network also should provide network isolation and service guarantee for each tenant.Current researches focued on the physical network，network virtualization and service guarantee were introduced.关键词：data center network;scalability;network virtualization;performance guarantee651|1989|0更新时间：2024-06-05
sum up
- 摘要：Active antenna system realizes the tight coupling of RF modules and antenna dipoles for the base stations，which makes it difficult to measure AAS RF performance.On the basis of study on several AAS test methodologies such as conducted test，coupling test and far field over-the-air test，AAS RF performance and antenna patterns was tested via combining the conducted test and far field over-the-air test，and the feasibility of combined test methodology was validated，and the reference for the future research on AAS testing was provided.关键词：AAS;conducted test;coupling test;far field over-the-air test429|1598|0更新时间：2024-06-05
- 摘要：Big data is easy to understand which has many potential application requirements and foreseeable enormous economic benefits.With the development of mobile internet，cloud computing and M2M，big data become a new focus in the information technology field.But，it brings some challenges and problems，such as data security and privacy protection.The security requirements of big data in various fields were reviewed，and the security features and problems in big data environment were analyzed.Then the security connotation of big data was summarized and some response strategies were proposed.关键词：ig data security;security connotation;response strategy1158|2503|0更新时间：2024-06-05
- 摘要：With the rapid development of mobile smart phone and OTT applications，the traditional ecological environment of mobile value-added service based on operator’s SDP has been greatly impacted.It is important to enhance new capabilities of SDP.The SDP’s core value and years of experience in practice was summed up，and the challenge which SDP faced in the mobile internet era were analyzed.In addition，with the introduction of network capability open，new business support needs and new technologies such as cloud computing，some advices of the evolution and developement of operator’s SDP were proposed.关键词：mobile internet;service delivery platform;OTT application;smart pipe;big data;cloud computing362|828|0更新时间：2024-06-05
- 摘要：With the fast growing scale of the operator’s network，the type and amount of services on the network have emerged in rapid growth.In such a circumstance，the bearer QoS has been difficult to guarantee simply by administrator.Therefore，the intelligent network management system with learning ability will become the mainstream of future development.A QoS evaluation scheme based on support vector machine was proposed to achieve QoS evaluation with learning ability.The application of real cases demonstrates the effectiveness of this scheme.The scheme proposed will give a strong reference of the future development of intelligent network management system.关键词：machine learning;QoS evaluation;support vector machine;intelligent network management system282|534|0更新时间：2024-06-05
- 摘要：Various factors which have an impact on the broadband user service perception were analyzed，and relevant suggestions to promote broadband user service perception level were proposed.At the same time，traditional broadband user service perception indexes were researched.Text methods of network upload speed，webpage elements download based on the Web 3.0 network were put forward.关键词：broadband user;service perception;access rate319|1893|0更新时间：2024-06-05
- 摘要：During the infrastructure construction of enterprise information system，cloud computing technology was used to abstract the logic of traditional physical computing resources，unify and integrate，reconstruct flexibly it，in order to improve resource utilization，reliability and manageability.By using more mature VMware virtualization solution，the goal initially was achieved.Meanwhile，a complete procedure was found which could not only lead to safe and efficient transition to the cloud platform，but also maximize the utilization of existing resources.Thus，the construction of cloud computing platform of is necessary and feasible.Compared with traditional infrastructure，cloud computing platform has obvious advantages in resources utilization，energy saving，cost reduction，management facilitation，it can bring good profound benefits for enterprise.关键词：cloud computing;virtualization technology;enterprise information system270|878|0更新时间：2024-06-05
- 摘要：The related concept of open platform and developer level management strategy were introduced，the development trend of open platform was analyzed.Then the demand and current situation of developer level management strategy in telecoms operator open platform were especially discussed，and its problems were pointed out，at last some recommendations to improve the developer level management strategy in enabler open platform were given.关键词：open platform;developer level management strategy;open enablement;telecom operator237|1020|0更新时间：2024-06-05
- 摘要：The influence which OTT brings to carriers was analyzed，the differences between OTT and telecom operators were compared，and the strategic selection for the domestic telecom operators was proposed by domestic and foreign telecom operators case study.关键词：telecom operators;OTT;strategic383|1692|0更新时间：2024-06-05
- 摘要：Based on all-round marketing management philosophy，quality monitoring system of power supply service was proposed，an index system of quality evaluation for power supply service was constructed and the processes of abnormal work orders were presented in detail.From the technical viewpoint，the implementing process of system was expounded.Finally，the comparative analysis through system application was carried out，and it shows that the system can indeed timely trace marketing operating results online and propose early warning information，correct timely，make the evaluation to service quality.关键词：power supply enterprise;service quality;inspection;monitoring269|982|0更新时间：2024-06-05
- 摘要：Based on the power supply demands of broadband access network，the equipments，wiring surrounding，multi-users balanced power supply and administration，security/protection about the reverse PoE application were studied and a test was done in laboratory.All those can provide reliable theory and experience for the reverse PoE construction and promote the development of the application of reverse PoE.关键词：power over ethernet;reverse power supply;broadband access network311|788|0更新时间：2024-06-05
- 摘要：The operation indicators of an enterprise reflect its production and operation situation directly，and provide data support for decision aids.The scientific and effective management of operation indicators is the top priority in the data asset management of a large enterprise.Combined with the comprehensive control of data in State Grid Zhejiang Electric Power Company，the model designing ideas of operation indicators and function-realizing way of indicators management platform were summarized，and the realization of scientific and effective management with building up indicators management platform were advanced.关键词：design of indicator model;indicator management platform;indicator management;business indicator346|1557|0更新时间：2024-06-05
- 摘要：Based on summarizing of traditional in-service inspection（ISI）management mode，the ISI management system was studied and developed.Realization of NPP ISI informational management was achieved.Due to the application of the management system，problems existed in traditional management mode were solved，ISI management efficiency and management capacity of NPP were significantly improved.Future application of the ISI management system can provide strong help for realization of specialization，standardization，intensive and multi-base-multi-units management of NPP ISI.关键词：nuclear power plant;in-service inspection;information management;ISI management system227|886|0更新时间：2024-06-05
Operating technology wide-angle
- 摘要：文中首先探讨了三屏互动的业务,接着分析了影片推荐业务、视频及照片分享、视频通信业务和位移业务等功能,最后简要的给出了融合业务的技术实现架构,这一研究对于移动互联的推广具有一定的参考价值。关键词：三屏互动;影片推荐;视频通信;位移业务16|47|2更新时间：
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