最新刊期
卷 31 ， 期 3 ， 2015
- 摘要：The background of the intelligent pipeline was briefly introduced,the multidimensional perception technology of intelligent pipeline was analyzed,the perception technology based on terminal was focused on,the corresponding solutions were put forward,that these solutions would be beneficial to realize the intelligent pipeline and finally the difficulties and challenges of these solutions were analyzed.It has carried on the beneficial exploration for the further technology research and practical deployment of the intelligent pipeline.关键词：intelligent pipeline;multidimensional perception;user perception;network perception;service perception;terminal information database791|1503|0更新时间：2024-06-05
- 摘要：The present situation of the smart terminal operating system security was described.The security problem of the existing operating system and the present status of research and development of domestic independent operating system were analyzed.Solution of the security reinforcement based on domestic TIOS,which reinforces kernel,system support library,GUI,application framework of TIOS,was discussed.The nine basic safety application programming were introduced.Finally,security requirements of different users and different security level of operating system were proposed.It provides reference for the development of all types of secure mobile phone.关键词：smart terminal mobile operating system;Android;iOS;TIOS;security reinforcement807|1848|0更新时间：2024-06-05
- 摘要：As the final voice solution for LTE,VoLTE has become the key research point of the industry.Several existing voice solutions of LTE user equipment were compared and analyzed in details.Technical advantages and unsolved problems of VoLTE which is based on pure PS network and IMS system were mainly discussed from the prospective of the LTE terminal.The technical characteristics and evolution direction of VoLTE were mentioned in the end.关键词：LTE terminal;VoLTE;CSFB;SV-LTE;SR-LTE853|2049|0更新时间：2024-06-05
- 摘要：Supporting remote management will be one of the key technologies of next-generation UICC.The relative research developments of remote management of UICC were introduced.The key technology of eUICC with remote management capability was analyzed.The service model,scenes and business model of UICC were discussed.Finally,a feasible service architecture based on operator's network architecture and typical business requirements was proposed.The architecture provides an exploration and practice for further study and large-scale commercial of UICC with remote management capability.关键词：remote management;eUICC;architecture;security911|1769|0更新时间：2024-06-05
- 摘要：NFC has a long industry chain with many manufacturers involved in,which brings a significant challenge to the compatibility.Four testing methods were presented to improve the compatibility of NFC terminals and POS terminals.These testing methods include more rigorous conformance testing method,instrument compatibility testing method,R/W compatibility testing method and POS compatibility testing method.Industry participants can use one or more of these four methods to improve NFC end-to-end compatibility based on their own needs,which can help optimize the NFC mobile pay environment.关键词：NFC;POS;conformance test;compatibility test898|1455|0更新时间：2024-06-05
- 摘要：Abstract: A new high-capacity USIM card was introduced and discussed in detail and depth. Its key technology （IC-USB interface, integrated NAND flash chips）was introduced. Compared to traditional SIM card, the high-capacity USIM card has higher transmission rates, larger storage space, and data security storage. The structure and functions of supporting client and management platform were discussed. The influence of this technology may have caused was analyzed.Appropriate suggestions and plantings to the future of business model and application scenario were given.关键词：high-capacity USIM card;business model;application scenario896|1487|0更新时间：2024-06-05
Topics: terminal and the smart card technology
- 摘要：The energy saving issue of 5G relay cellular network was discussed.Relay technology is an important technology in the fifth generation mobile communication network（5G）.By switching some base stations with low traffic into sleep mode,the energy can be saved.Therefore,the state of base stations in 5G may convert usually,the network topology and business changed over time.Considering both quality of service（QoS）and power consumption of the whole network,a dynamic energy saving（DES）algorithm was proposed to optimize the overall performance of QoS and energy efficiency for 5G relay cellular network.Simulation results under different traffic conditions demonstrate that the DES algorithm can reconfigure the network,shut down part of the base station and relay nodes to significantly reduce energy consumption,especially when the network load is low.关键词：5G;relay selection;green communications;energy efficiency;quality of service840|860|0更新时间：2024-06-05
- 摘要：CoMP-JP and CoMP-CB are two transmission modes for coordinated multi-point and have different gains incapacity requirements and improving the system performance. Aimed at the backhaul capacity shortage， a hybrid CoMPmode selection algorithm was proposed under the traditional transmission mode selection based on the user’s group. The algorithm selects the optimal transmission mode for individual user. It can be full use of the backhaul capacity and achieve the maximal system throughput. Simulation results show that the proposed algorithm enhanced the system performance under the limited backhaul capacity at a large extent， and with the increase of users， the higher performance gain.关键词：hybrid cooperative transmission;backhaul capacity;mode selection339|582|0更新时间：2024-06-05
- 摘要：In order to solve the problem of selecting frequency more and more difficultly for radio network,an intelligent frequency selection technology based on an adaptive genetic algorithm was proposed.Frequencies were selected for whole radio network from the perspective of intelligent optimization.On the basis of the standard genetic algorithm,this novel method improved genetic operators,and the preservation of the optimal individual algorithm to ensure the diversity of the population was introduced.Therefore,the arithmetic which did well in avoiding some deficiencies of the traditional frequency selection algorithm prevented local optimization and ran into overall optimization ultimately.Theoretical analysis and simulation results show that the new algorithm in solving the problem of frequency selection for large-scale network has higher efficiency and precision than the traditional algorithm,and stability is significantly enhanced.关键词：intelligent frequency selection;genetic algorithm;population;adaptive296|429|0更新时间：2024-06-05
- 摘要：The recent intrusion detection systems based on machine learning generally assume that the intrusion traffic always satisfies stationary of statistics.However,this assumption is not always held when adversaries arbitrarily alter the distribution of traffic data,or develop new attack techniques,which may reduce the detection rate.To overcome this adversarial drift,a novel drift detection approach based on weighted Rényi distance was suggested.The experiment on KDD Cup99 shows that the weighted Rényi distance is able to perfectly detect the adversarial drift,and improve the intrusion detection rate by retraining the model.关键词：intrusion detection;attack traffic;adversarial drift;weighted Rényi distance458|1177|0更新时间：2024-06-05
- 摘要：The resource allocation issue for sensing-based spectrum opportunistic access and sensing-based spectrum sharing access in two-way relay cognitive network with imperfect spectrum sensing was discussed.Different from the traditional resource allocation methods for two-way relay network,new algorithm jointly considering sensing time and transmission power in secondary system.Under the condition of the sensing time and the transmission power,the maximal throughput of the secondary system can be obtained.To protect the primary user effectively from interference,the average interference power constraint in each hop was considered.The total transmission power constraint of the secondary system is also considered.The proposed algorithms can acquire the optimal sensing time and power allocation under imperfect spectrum sensing for the sensing-based spectrum opportunistic access and sensing-based spectrum sharing access.Finally,the performance of the two schemes was compared and the effectiveness of the proposed algorithm was verified.关键词：cognitive radio;two-way relay;sensing time;power allocation271|744|0更新时间：2024-06-05
- 摘要：A two-step compressed spectrum sensing scheme for wideband cognitive radio was proposed in order to reduce the huge data transmission overhead of the traditional DCS scheme.The CS reconstruction of this scheme was divided into two steps,i.e.the information fusion for the support set and the joint recovery of multiple signals,and the prior information obtained from the former step can guide the joint recovery of the latter step.Simulation results show that this scheme can achieve better performance than the traditional DCS scheme as long as 50% of users are involved in the joint recovery,which means that this scheme can reduce the data transmission overhead and save energy consumed greatly.关键词：cognitive radio;spectrum sensing;compressed sensin277|674|0更新时间：2024-06-05
- 摘要：The principle and construction of the structure of smart telescopic on big data network server groups were elaborated.The key technologies involved in the smart scaling of big data network server groups were discussed.After investigating key technologies,including the monitoring of the workload of the server group,the smart control of the number of servers,and the scheduling of access loads,the principle and realization method for the smart scaling of big data network server groups were proposed and technical supports were provided for the smart scaling and effective energy conservation of big data network server groups.According to the proposed construction method and key technologies,a smart scaling model for big data network server groups was provided as well.关键词：big data network;server group;smart scaling;load scheduling306|880|0更新时间：2024-06-05
- 摘要：In order to solve the problem of unstable connectivity and high bit error rate,which are caused by rapid changes in the density of vehicles on the road,while the transmission radius remained unchanged,a variable transmission range routing protocols based on vehicle density in vehicular Ad-Hoc network was proposed.According to different vehicle density,node could adjust the farthest transmission distance and reduce the transmission latency of the message,which could ensure high connection probability of the network.Based on homogeneous poisson point process model,the change conditions of transmission range with different vehicle density were deduced,and its feasible was proved.Furthermore,mathematical calculate formula of average latency was obtained according to the theoretical analysis.At last,variable transmission range routing protocol based on vehicle density and fixed transmission range routing protocol were compared by simulation.The simulated results show that the proposed protocol can be applied in actual environments,and the message can be transmitted fast from source node to destination node under the condition of high connection probability.关键词：vehicular Ad-Hoc network;routing protocol;average298|689|0更新时间：2024-06-05
- 摘要：In the physical layer security,that inhibiting the accuracy of channel estimation at eavesdropper can indirectly enhance the received signal quality difference between the legitimate receiver and the eavesdropper,thus improving signal transmission security.The proposed discriminatory channel estimation scheme was based on the help of friendly jammer,which was based on artificial noise emitted by friendly jammer to interfere the channel estimation process of the eavesdropper.Further,the optimal power allocation was given between training sequence and artificial noise by maximizing the channel estimation error of the eavesdropper,which can suppress the channel estimation quality of the eavesdropper more effectively.Simulation results show that this method can effectively restrain the channel estimation performance of the eavesdropper,and it can improve the received signal quality gap between the legitimate receiver and the eavesdropper.关键词：physical layer security;discriminatory channel estimation scheme;friendly jammer;optimal power allocation335|605|0更新时间：2024-06-05
- 摘要：In order to improve the success rate of data packet transmission in heterogeneous and hierarchical cognitive radio sensor network,the nodes were divided into sustained-transmission and non-sustained-transmission conditions.The ways of improving the success rate of data packet transmission are more energy consumption and better channel assignment,so that there is a type of centralized channel assignment strategies.At the same time,in order to reduce the energy consumption per bit in information transmission process of nodes,the packet size adaptation mechanism was optimized,ensuring the optimal packet size of non-sustained-transmission nodes.Simulation results demonstrate that the channel assignment strategy and the optimization mechanism improve the efficiency of energy utilization and the performance of network.关键词：cognitive radio sensor network;transmission condition;channel assignment strategy;efficiency of energy utilization335|675|0更新时间：2024-06-05
Ressearch and development
- 摘要：Pattern matching is the core module in network security system,it's the highest occupancy rate of system resources is more than 70%.According to problem and challenges of pattern matching in the network security system,taking 2000 as the boundary,the pattern matching was divided into the traditional pattern matching method and the new pattern matching method.Through the analysis of the principle and the computational complexity of different pattern matching method and the development and evolution of the new pattern matching method,applicable environment of different methods was concluded.A comprehensive review and evaluation of pattern matching in network security system was presented.Finally,a conclusion and some suggestions for future research were summarized and prospected.关键词：pattern matching;intrusion detection;network security331|1139|0更新时间：2024-06-05
summarize
- 摘要：The traditional monitoring maintenance system only watches the running metrics.However,these metrics is not sufficient to reflect the status of the whole system for fine-grained monitoring of the system at users and application level.An active operation and maintenance platform based on user experiences was proposed.Through the mining of big network data,the platform can recognize a variety of user behaviors,and measure the user experience time along with the system performance at user's level.Tests and experiments show that the platform works well with large throughput and low memory occupation.The application level performance monitoring,which provides an efficient way to improve user experience,was realized.关键词：system monitoring;performance;user experience;active operation and maintenance269|771|0更新时间：2024-06-05
- 摘要：Electric energy data acquisition system is an important part of smart grid.Against the problem of the communication way of the 230 MHz wireless private network in the electric energy data acquisition system,low communication rate,fewer access points,low acquisition success rate,poor real-time performance,the technical proposal of the SGWM-based 230 MHz wireless broadband communications key technology of the communication system for the electric energy data acquisition system was proposed.The communication network technologies,such as the carrier aggregation technology,smart routing technology,networking technology,were discussed.The SGWM wireless communications technology in the electric energy data acquisition system was elaborated.By designing and analyzing networking scheme,the result indicates that the field application effect of the SGWM-based 230 MHz wireless broadband communications key technology in the electric energy data acquisition system is very good.Thus it provided technical support for the propel of the information bidirectional interaction and construction of the strong smart grid.关键词：SGWM;230 MHz;electric energy data acquisition system255|560|0更新时间：2024-06-05
- 摘要：To fulfill the communication needs of smart distribution and utilization system,a novel power dedicated network has been developed.The system faces a problem that it may operate coexisted with a 230 data transceiver system.In order to keep the two systems operating stably and efficiently at the same time,a trust-based cooperative spectrum sensing algorithm was presented.According to the characteristics of user behavior,cognitive radio users were classified into fiduciary users,lapsed users and malicious users.By analyzing the relationship among detection result,credibility of cognitive radio users and communication channel signal-to-noise ratio,the credibility weight of cognitive radio users was given,and a trust-based cooperative spectrum sensing algorithm was proposed.The simulation results show that the algorithm improves detection performance effectively.关键词：cognitive radio;electric power wireless communication;spectrum sensing;trust508|655|0更新时间：2024-06-05
- 摘要：Since the wide use of virtual technology,the resource use rate in cloud data center has been improved effectively than ever before.However,there is still a large space for improvement due to the resources usually are pre-started and pre-allocated by the user demand rather than the actual needs.In order to allocate available resource more accurately,two algorithms were proposed to meet the needs of the daily use in most of time.The available virtual resources would be arranged according the forecast using the algorithms of hierarchical composition of loading and the peek resources needs would be dynamic allocated using the algorithms of stochastic equilibrium and queuing theory.The results of experiment via the system based upon above theories show that the solution provides a kind of very effective advanced means for the optimal use of resources and energy saves.关键词：data mining;smart grid cloud;cloud resource scheduling431|947|0更新时间：2024-06-05
- 摘要：Electric power communication network is an important support platform of electric power grid,and its development level is closely with the latter.An evaluation method of the adaptability of electric power communication network and the power grid was put forward.With grey relational analysis method and based on the statistical data,the rule between each area communication network construction scale and grid development level was revealed.It is a meaningful research on evaluating the development of electric power communication network and its investment.关键词：electric power communication network;electrical grid;grey relational analysis;evaluation index439|828|0更新时间：2024-06-05
- 摘要：The applications and business of CGN ERP system is in-depth expansion.The critical path and advantages of ITIL,ISO20000,CMMI and other standard system were analyzed.CGN ERP quality management system was implemented.It runs ERP systems as the thinking of running power station.The nuclear safety culture was blended into the quality level and process control of system.Through the successful implementation of quality management system,to protect the ERP system is in safe and stable operation,to ensure the core business processes are in the continuation and development,to bring the information values to the users.关键词：integrated;quality management;end-to-end;change control;ERP363|1345|0更新时间：2024-06-05
- 摘要：In view of the traditional enterprise couldn't use such unstructured data efficiently,a big data solutions based on integration of data warehouse and big data was discussed.Based on the theory of data warehouse construction and architecture of the next-generation EDW,Hadoop was used to collection,processing and storage for unstructured data.By big data technology work together with traditional data warehouse and BI,to help enterprises to solve difficulties that applied.Integration of data warehouse and big data can resolve the difficulty on data processing and promote the implementation of big data projects.关键词：big data;data warehouse;Hadoop;architecture473|1949|0更新时间：2024-06-05
Electric power information column
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