最新刊期
卷 29 ， 期 8 ， 2013
- 摘要：The analysis was made for the nominal voltage selection and system design method which was based on energy efficiency prompt and power reliability increasing,these different goals to replace AC power system by DC power system,and these two direct current power supply system was introduced.It was compared that the reliability,the efficiency,the security and the input/output ratio which could prove the scientifically and large-scale application feasibility of 240V direct current power supply system.关键词：high voltage power supply;240V;power technology721|1991|0更新时间：2024-06-05
Viewpoint focusing
- 摘要：Internet architecture was discussed firstly,then the major international research progress of future network architectures was introduced.And the recent development of software defined networking（SDN）was introduced,an abstract model of SDN architecture was proposed.Finally,a FINE architecture for future network innovation environment project was introduced,which was funded by national high-tech R&D program（“863”program）.关键词：future network architecture;software defined networking;future network innovation environment974|2171|0更新时间：2024-06-05
- 摘要：As the scale enlargement of the internet and the continuous deployment of new applications,the disadvantages of the rigid IP architecture becomes increasingly evident.The reconfigurable network has drown widely attention due to its characteristics such as flexibility,scalability,adaptability and green energy.The current situation of the reconfigurable technology was detailed,then the reconfigurable network architecture and its adaptability for new applications were discussed.Finally,the green energy-saving characteristic of the reconfigurable network was also analyzed.关键词：reconfigurable network;future network architecture;scalability;green energy-saving857|2594|0更新时间：2024-06-05
- 摘要：CCN is communication architecture that takes content as a primitive,and retrieves content by name,not by host IP again.It builds on publish/subscribe and network-embedded caching with bandwidth-storage tradeoff.Since it is a clean-slate design,there are many issues to be explored.The concepts,characteristics,network model and recent advances of CCN were introduced.The challenges and some key issues CCN faced were also emphasized.In order to demonstrate the feasibility and implementations,two CCN system samples were also presented.关键词：future internet;content-centric networking;information-centric networking;named data networking;network model1051|2046|0更新时间：2024-06-05
- 摘要：The new requirements for network management introduced by future network and virtual network environment were described.The network management mode under the network virtualization environment was discussed,and it was clarified that the dynamic self-adapting management was the direction of the future network management.Three research aspects of dynamic self-adapting management were proposed:information perception,resource management and across-network negotiation,and the research contents were analyzed.关键词：uture network;dynamic self-adaping management;information perception;resource management;across-network negotiation786|941|0更新时间：2024-06-05
- 摘要：The current internet is simple in its fundamental interconnecting capability and is inflexible in its protocol architecture.Such a situation makes internet unable to well handle the variety of network applications' demands.Fortunately,a noval approach of so called“network service composition”can address the above problems.From the rationale of reductionism,the meanings of network services and their compositions were first explained.Several fundamental and key methods of network service composition were then presented,with relevent research projects shown.And finally,the ongoing work in the reconfigurable architecture of network infrastructures was introduced.关键词：network architecture;network service;service composition;reconfigurable network595|887|0更新时间：2024-06-05
- 摘要：Network virtualization is one of the important features and evolving directions of future network.It is very important for the robustness,survivability and manageability of the network virtualization environment（NVE）to localize fault timely and accurately as well as recover from fault quickly.However,traditional fault management mechanisms could not deal with such features of NVE as enlarged scale,multi-layer and uncertainty of mapping relationships.It is necessary to research fault management mechanisms for NVE.The fault management process in NVE was presented,and a survey of some recent work on this topic was offered.关键词：network virtualization;fault detection;fault localization;fault recovery552|869|0更新时间：2024-06-05
Special topics:future network architecture and key technologies
- 摘要：The concept of service security was thoroughly analyzed,and the generalized and narrow business security was proposed.The generalized business safety system was divided into five layers,and network security and safety requirements were defined,meanwhile the narrow business security was focused on the security of application layer,which was the concentration of the research.The security of application layer mainly includes two aspects:common vulnerabilities and loopholes in the service logic,which are defined and researched intensively.A security architecture against the security problem of the business-oriented system,and the security architecture taken as a better guideline for the design and implementation of business systems were proposed.关键词：telecom system business security;narrow business security;security architecture604|1049|0更新时间：2024-06-05
- 摘要：With the continuous expansion of network scale and the development of service platform,how to improve the safety protection ability of service platform has become the focus of communication network operation and maintenance for telecom operators,in order to achieve the effective and intensive protection of service platforms,the most effective way is security domain division and boundary integration.Reference to the maintenance of China Telecom service platforms and the experience of the industry,the method of security domain division and the boundary integration was analyzed,and the construction of a intensive security domain division system for service platform was discussed.关键词：security domain;boundary integration;service platform;intensive security protection629|1262|0更新时间：2024-06-05
- 摘要：Taking the protection of information security as the focus,the technical level in the security protection of information system,the partition of security domain and boundary integration transformation were analyzed and discussed.China Telecom SMS platform was selected as a typical case,and the security domain transformation of systems as message couters and gateways were researched and analyzed.The conclusion could provide good guidance for other service platform of information security,business continuity.关键词：short message;information security;security domain506|1071|0更新时间：2024-06-05
- 摘要：Information security mechanism is a key part of security network video surveillance system,including service data security and multimedia data security,and there are a lot of security solutions and specifications now.Two typical specifications on the network video surveillance system were selected to analyze their information security mechanism and the encryption algorithm,and the suggestions on common data protection mechanism were given out.关键词：network video surveillance;data security;encryption;signaling517|1965|0更新时间：2024-06-05
- 摘要：The mobile internet architecture and its security risks were introduced.Then the index system of evaluation was discussed,which mainly included confidentiality,integrity,availability,reliability,safety and performability.In the end,a method was proposed for evaluating end-to-end service security.关键词：mobile internet;security risk;end-to-end;confidentiality;integrality;availability541|1524|0更新时间：2024-06-05
- 摘要：Some security incidents of user information were analyzed and the existent leaks were studied,the cause of the problem was summarized.The solution was put forward by analyzing from several aspects,like the user information protection,security technical means,sentimental information protection,security management system.Some constructive opinions and suggestions for the establishment of communication industry user information security system were put forward.It is practical and valuable for communication industry.关键词：information security;user information;security system441|800|0更新时间：2024-06-05
- 摘要：As an important support system,it is necessary for the telecommunication service platform to ensure the security of service system and the information data,and to try to avoid the negative effects brought by security events and economic loss.Based on the research and analysis,several typical problems of safety telecommunications business platform,and the entry point for the process,were studied.At last,with two aspects of management and technology,the solution to security problems of service platform was discussed.关键词：business platform security;process management;access layer security;terminal security management447|885|0更新时间：2024-06-05
- 摘要：Cloud computing is a new concept of providing virtualized resources to the consumers.Consumers can request a cloud for services,applications,solution and can store large amount of data in different locations.But with the growing popularity of cloud computing,the increasing risk of security is becoming a main and top issue.The type of cloud computing and the network security issues were discussed.A backup plan required for overcoming the network security issues in cloud computing was proposed.关键词：cloud computing;network issue;security issue;countermeasure558|1169|0更新时间：2024-06-05
Feature:safe business platform
- 摘要：The IOT technology causes high attention since it came out,and the patents about the IOT technology were increasing quickly.From the analysis of patent,readers can learn about the present status of IOT technology development.And the patent analysis is also benefit for the R＆D companies in China to prediction the trend of technology,find out the distance of technology,and choose the suitable research direction.关键词：IoT;patent;terminal equipment;mobile network;middleware575|832|0更新时间：2024-06-05
- 摘要：According to characteristics and requirements of emergency communication,high survivable heterogeneous emergency communication network based on wireless self-organized network was constructed to provide a reliable and flexible communication support platform for emergency site.Firstly,traits and survivable demands of heterogeneous emergency communication network were explained.Secondly,the design of high survivable heterogeneous emergency communication network was expounded and analyzed in detail,including networking mode,design strategy and network structure.Finally,some countermeasures which could improve survivability of emergency communication network further were discussed.关键词：emergency communication;wireless self-organized network;survivability;architecture;context awareness386|1194|0更新时间：2024-06-05
- 摘要：Handover is one of the most important parts in mobility management.In the LTE-Advanced system,more new technologies such as relay and carrier aggregation and so on were introduced,which put forward higher requirements and challenges to the handover mechanism of system.The handover process of the traditional LTE-Advanced system and LTE-Advanced relay system were analyzed,the cooperative handover algorithm based on auxiliary carrier in LTE-Advanced relay system was proposed.This algorithm makes use of the advantages of wide spreading of low-frequency carrier and rich resources of high-frequency carrier,and in conjunction with relay technology and carrier aggregation technology,achieving the purpose of reducing the handover outage probability and improving the throughput of the system.关键词：LTE-Advanced;relay;auxiliary carrier;cooperative handover431|782|0更新时间：2024-06-05
- 摘要：Cognitive radio has the advantage of high spectrum utilization since the spectrum can be shared by primary and secondary user.Meanwhile,the new adaptable characteristic is required for the secondary user.On the basis of analyzing D-S theory of evidence,a novel distributed cooperative spectrum sensing scheme was presented,which modified the combination equation for conflicting evidence source,and the BPA function based on fuzzy degree calculation was redefined.Simulation results show that the proposed scheme can sense the available spectrum in the cognitive radio networks very well,and can be used as a general spectrum sensing scheme in AWGN and Rayleigh fading channel when compared with the traditional ＂and＂,＂or＂ fusion rules and other D-S theory of evidence schemes in the previous literature.关键词：cognitive radio network;spectrum sensing;dempter-shafer theory of evidence373|643|0更新时间：2024-06-05
- 摘要：An implementation of the intelligent transportation VANET was presented.The implementation adopted IEEE 802.11p communication standard which was adapted to the environment of vehicular traffic,improved the routing protocol for VANET.Based on this VANET,two applications,intellisense of traffic condition and comprehensive navigation system,were realized.Test results show that the network performance of this implementation could satisfy the requirement of VANET.关键词：IEEE 802.11p;routing protocol for VANET;intellisense of traffic condition;comprehensive navigation system352|702|0更新时间：2024-06-05
- 摘要：With rapid development of the new generation information technology,digital city is evolving to smart city that creates a new vision for modern city.Smart city is a concrete manifestation of smart earth in city areas,and it has three features of thorough perception,depth interconnected and intelligent application.This study compares digital city and smart city from various aspects of data collection,interconnection,information processing,architecture and application,based on which the technology roadmap of instrumented,interconnected,intelligent were discussed.关键词：smart city;instrumented;interconnected;intelligent476|1969|0更新时间：2024-06-05
- 摘要：Based on the spectrum allocation of Underlay model in cognitive radio systems,a double-threshold based spectrum allocation algorithm was proposed.Two signal-to-noise radio（SNR）thresholds were also given.If SNR is less than the small threshold,aiming to maximize the channel capacity of the primary users,some second users are chosen to cooperate with primary users to communicate data.If SNR is larger than the big threshold,considering to maximize the number of the second users accessing the spectrum,some second users are allowed to use the occupied spectrum with low power.If SNR is between the two thresholds,primary users occupy the spectrum alone.Simulation and numerical results illustrate the reliability of the theoretical analysis.关键词：cognitive radio;double-threshold;spectrum allocation305|912|0更新时间：2024-06-05
Ressearch and development
- 摘要：Abstract:As the standardization,refined and integrated development of information communication network management,communication network monitoring is faced with massive network alarm information that has brought new challenges to the network alarm management.The alarm types system composition based on information communication network alarm management were comed up with,the methods from information communication in terms of the effective control of network alarms were discussed,and also the network equipment alarm logic correlation to the logical level of network equipment alarm correlation was extended,at the same time,the study and application of data mining algorithms in alarm correlation was discussed.Finally,the prospect for the intelligent alarm analysis system was provided.关键词：information communication network;alarm analysis;alarm correlation;alarm management458|1637|0更新时间：2024-06-05
summarize
- 摘要：One solution was presented that telecom operators can achieve whole network resource intensive management by building centralized and unified cloud platform.Some problems were analyzed in detail and further resolved when bringing into and managing resource.The unified management,unified dispatch and unified presentation of resource by decentralization of authority and domain can be achieved,automatic opening of service by means of process connection can be achieved.The usage and use efficiency of monitored resource were also discussed combined with the actual application in cloud computer platform,which can provide evidence for intensive usage of resource.关键词：cloud computing;network;data center;IT infrastructure;IaaS335|1582|0更新时间：2024-06-05
- 摘要：As more and more users begin to use microblog,people eagerly want to dig interesting patterns from the microblog data.How to efficiently collect data from the service provider is one of the main challenges.To address this issue,a distributed crawling solution based on microblog API was present.The distributed crawling solution simulates microblog login,automatically gets authorized,and control the invoked frequency of the API with a task controller.A time trigger method with memory database was also proposed to avoid extra trivial data duplication and improve efficiency of the system.In the distributed framework,the crawling tasks can be assigned to distributed clients independently,which ensures the high scalability and flexibility of the crawling procedure.The feasibility of the crawler technology according to Sina microblog instance was verified.关键词：Sina microblog;crawling strategy;distributed crawl;microblog API377|1194|0更新时间：2024-06-05
- 摘要：The mechanism of the fifth-order inter-modulation was discussed,and a frequency optimization algorithm for reducing the network inter-modulation interference was proposed.The inter-modulation interference produced by frequency combination can be suppressed when the TCH frequencies combination of the cell meets the following requirement:935×106≤fmin＜fmax≤954×106Hz,and the difference between the maximum number and minimum number of frequency points is less than 65.This method can suppress the inter-modulation interference from the source,and provides an innovative idea for inter-modulation interference optimization.关键词：fifth-order inter-modulation;interference;frequency optimization342|663|0更新时间：2024-06-05
- 摘要：In order to solve the increasingly serious security issues caused by malwares in mobile internet,a“cloud-pipeline-terminal”model was proposed to implement detection and killing of mobile internet malwares.The proposed model composes of a cloud computing platform to support the analysis and measurement of the malwares and to implement strategy distribution and management of the system,a monitoring and intercepting system on the side of mobile communication pipelines and a terminal security application to check and kill the malwares.The purpose is to build a safe and harmonious mobile internet environment.关键词：mobile internet;intelligent terminal;security;malware;cloud-pipeline-terminal285|843|0更新时间：2024-06-05
- 摘要：The features and scenarios and agreement of VDI were stated,performance of agreement base testing,and the functional architecture and programming architecture base desktop and interface calls and data channel of the SPICE were analyzed.The important point of technology and the prospect of SPICE were proposed.关键词：open source;virtual desktop infrastructure;simple protocol for independent computing enviroment502|1723|0更新时间：2024-06-05
- 摘要：LACP is a link aggregation technologies which has been widely deployed in network architecture,it is considered as a low cost but effective way to increase bandwidth and improve stability of network as well.LACP technologies were introduced,common cases in real network were analyzed,and a solution on LACP validation in lab environment was put forward.Key points on LACP functional and performance validation were provided,and these were implemented in lab environment by using Ixia tester to emulate protocols and traffics over LACP.关键词：LACP;link aggregation;convergence time265|1443|0更新时间：2024-06-05
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