最新刊期
卷 34 ， 期 9 ， 2018
- 摘要：Quantum key distribution (QKD) based quantum secure communication (QSC) is one of the promising solutions for improving information security.With the development of experimental network construction and demonstrational application,the demand of QSC test evaluation and standardization is becoming more urgent.Based on the introduction of technology and architecture of QSC system,the latest progress of QSC test evaluation and standardization was reviewed,typical questions in test evaluation and standardization were analyzed,and development trends and prospects were also discussed.关键词：quantum key distribution;quantum secure communication;test evaluation;standardization784|1621|0更新时间：2024-06-05
- 摘要：As the first practical representative technology in the new quantum revolution,quantum key distribution (QKD) brings a promising solution to achieve long-term security guarantee,which has made series of progress from research to practical deployment and applications in recent years.The architecture design of quantum secure communication network was firstly discussed,which extended point-to-point QKD link to multi-user QKD network.Furthermore,combining with the classical cryptography,an enhanced solution was proposed to apply the quantum key generated by QKD to the mobile terminals,which offered the possibility to apply QKD in general mobile applications.关键词：quantum key distribution;network security;cryptography;mobile application1430|2782|0更新时间：2024-06-05
- 摘要：Quantum secure communication network is a new kind of security network.It is a new problem that how to improve the bandwidth utilization ratio of the backbone link of quantum secure communication network and the network performance-price ratio by reasonable traffic planning method.The particularity of traffic planning in the quantum secure communication network was analyzed,and a traffic planning model was given.Based on this model,the user wide area encrypted communication bandwidth could be planned in the case of determining the key distribution bandwidth of the backbone link.At the same time,the model could be used to adjust the bandwidth of key distribution in network bottleneck links and improve the network performance.Finally,the application of the proposed flow planning method was demonstrated by numerical simulation.关键词：quantum secure communication network;traffic planning;backbone link717|855|0更新时间：2024-06-05
- 摘要：Based on the study of the mechanism of quantum encryption system,the system architecture of open quantum cryptographic communication was proposed.In order to better integrate with the existing communication system,a quantum key distribution (QKD) system and a large capacity optical communication co-fiber transmission scheme were proposed,and the QKD system and 80×100 Gbit/s DWDM were verified through experiments.The feasibility of the system common fiber transmission was realized under the condition of ultra 100 km common fiber transmission,the QKD bit rate ＆gt;1.0 kbit/s and 8 Tbit/s DWDM system without error bit and the practical threshold of the commercial encryption device key rate＆gt;1.0 kbit/s was achieved.关键词：quantum secure communication;co-fiber transmission;wavelength division multiplexing1062|1546|0更新时间：2024-06-05
- 摘要：At present,the technologies of device and system required for the fiber-based point-to-point quantum key distribution (QKD) are gradually becoming mature and showing the trend of commercial application.Therefore,how to multiplex quantum signals and classical optical signals in a single fiber to greatly increase the capacity and save fiber resources has been becoming one of the hotspots of academia in recent years.The noise impairments in the co-propagation of quantum signals and classical optical signals over a single fiber were mainly studied.Firstly,the influences of the main noises,four-wave mixing (FWM) and Raman scattering on the quantum channels were analyzed.Next,an unequal-frequency-spacing-based FWM noise suppression algorithm and a wavelength assignment algorithm for joint suppression of FWM and Raman scattering were proposed for different application scenarios with different channel space and transmission distance.Finally,the superiorities of the proposed algorithms were verified through numerical simulations.The research results provide feasible noise suppression schemes for different application scenarios in the future.关键词：quantum key distribution;co-propagation;four-wave mixing;Raman scattering;noise suppression;wavelength assignment892|1695|0更新时间：2024-06-05
- 摘要：The co-propagation of quantum key distribution (QKD) and classical optical communication via wavelength division multiplexing (WDM) was studied,based on 40 MHz system clock decoy BB84 QKD.In the bi-directional CWDM scheme,1.2 kbit/s key generation rate was achieved while the quantum wavelength (1 550.12 nm) ,synchronization wavelength (1 310 nm),forward direction error-free 100 Mbit/s data wavelength (1 590 nm) and backward direction error-free 100 Mbit/s data wavelength (1 610 nm) were multiplexed over 70 km fiber.In the dual-fiber unidirectional CWDM scheme,1.58 kbit/s key generation rate was achieved while the quantum wavelength (1 550.12 nm),synchronization wavelength (1 610 nm) and forward direction error-free 10 Gbit/s data wavelength (1 310 nm) were multiplexed over 55 km fiber.In the dual-fiber unidirectional DWDM scheme,1.16 kbit/s key generation rate was achieved while the quantum wavelength (1 550.12 nm),synchronization wavelength (1 610 nm) and two forward direction error-free 100 Gbit/s DP-QPSK data wavelength (emulated,1 551.72 nm and 1 552.52 nm) were multiplexed over 70 km fiber.关键词：quantum key distribution;classical optical communication;wavelength division multiplexing1402|1502|0更新时间：2024-06-05
Topic:quantum secure communication technology and application
- 摘要：In massive MIMO systems,with the increase of the number of users and antennas,the complexity of the downlink zero forcing (ZF) precoding increases due to the existence of large matrix inversion.In order to reduce the complexity,an improved weighted two diagonal iteration precoding algorithm based on the Jacobi iterative algorithm was proposed.The low-two diagonal matrix was taken as iterative matrix,and the iterative results were weighed addition with the last results to accelerate the convergence speed of the iteration.According to the diagonally dominant characteristic of channel matrix in massive MIMO systems,the first term of the Neumann approximation of matrix inversion was used as the initial value of the iteration to accelerate the iteration further.Compared with the traditional ZF precoding,the proposed scheme can reduce the complexity with an order of magnitude and ensure the performance of the precoding scheme.关键词：massive MIMO;Jacobi iteration;zero forcing precoding;low complexity;weighted two diagonal iteration1086|846|0更新时间：2024-06-05
- 摘要：Due to the advantages of license-free,strong directionality,high system capacity,and high transmission rate of Gbit/s,60 GHz band is listed as one of the candidate bands for new radios (new radio).In 5G ultra-dense networking scenario,the randomness of node switching caused by the decrease of the distance between network nodes may cause severe multiple access interference and resource mismatch problems.In this regard,based on the concept of cross-layer collaborative design,a resource scheduling strategy based on fairness was proposed.The multiple access performance of the strategy was simulated in a 60 GHz pulsed wireless communication system based on TH-PAM (time hopping pulse amplitude modulation).Simulation results show that compared with the system with pure physical layer optimization algorithm,the multiple access system which adopts this strategy shows stronger fairness and lower system error rate,but it needs increase the transmission power to meet the requirements of the coverage of the equivalent communication system.That is,there is a certain trade-off between the energy and fairness of the system,which can be used to guide the structure and deployment of the actual communication system.关键词：5G;multiple access;cross layer resource allocation;fairness861|620|0更新时间：2024-06-05
- 摘要：To apply intrusion detection system (IDS) efficiently so as to suppress WSN malware propagation,a cloud-based network infrastructure for realizing functions of WSN IDS was presented,considering the real basis that the resources of WSN nodes were limited whilst the resources of cloud computing platform were almost unlimited.Based on the analysis of the game process between a sensor node and the corresponding WSN IDS agent,a WSN-malware-propagation-suppression game model was constructed by employing the dynamic Bayesian game,and the requirements of energy consumption in sending monitored data and privacy protection for sensor nodes were satisfied.According to the proposed game type and refined Bayesian equilibrium,the optimal strategie for suppressing WSN malware was proposed as well the algorithm for actual application was given.The factors that influence WSN IDS agents to select their optimal strategies were analyzed,and the experimental foundation was provided for the application of the proposed approach.关键词：wireless sensor network;malware;intrusion detection system;cloud computing;dynamic Bayesian game391|969|0更新时间：2024-06-05
- 摘要：The performance of the traditional second-order statistics based channel estimation methods degrade seriously in the presence of impulsive noises.In order to deal with this problem,a Weibull distribution function based variable step-size sign algorithm for channel estimation under impulsive noises was proposed.The proposed method was robust against impulsive noises and it could improve the convergence speed of the sign algorithm with the Weibull distribution function based variable step-size method.Computational complexity analysis and simulation results demonstrate that the proposed algorithm can achieve the same steady-state estimation error with faster convergence speed and lower computational complexity.关键词：impulsive noise;channel estimation;Weibull distribution function;variable step-size;sign algorithm387|710|0更新时间：2024-06-05
- 摘要：The overall pulse parameters of complex system radar signals are varied and overlap seriously.The accuracy rate of the method using overall pulse parameter sorting is seriously decreased,but the intra pulse characteristic parameters are relatively stable.A method for pre-sorting radar signals in complex systems was proposed by extracting the phase coefficient of the intra-pulse characteristic parameters of the signal,combining the more stable inter-pulse parameters,and using the improved support vector clustering algorithm.Simulation results show that in the pre-sorting of complex system radar signals,the problem of increasing-batch can be solved effectively and the accuracy of sortingcan be improved.关键词：complex system radar;signal pre-sorting;intra pulse characteristic parameter;improved support vector clustering498|1008|0更新时间：2024-06-05
- 摘要：The shared aperture interleaved sparse array antenna is an effective way to implement a multi-function array antenna.The existing parameterized mutual coupling elimination methods are all developed for uniform array antennas.The mutual coupling matrix which is studied is a regular square matrix and is not applicable to the mutual coupling matrix model of the shared aperture interleaved sparse array antenna.After fully considering the speciality of “sparse” and “azimuth dependence” of mutual coupling in sub-arrays of a shared aperture interleaved sparse array antenna,the conventional mutual coupling matrix extension was expressed as “non-square” “enhanced mutual coupling matrix”.Coupling effects between subarrays and subarrays in interleaved arrays of sparse arrays were modeled,and the modeling and correction of mutual coupling errors in shared aperture sparse array antennas were finally achieved through the parameterization of “enhanced mutual coupling matrix”.Simulation results verify the effectiveness and feasibility of the proposed method.关键词：shared aperture;interleaved sparse array;array correction;extended mutual coupling matrix407|957|0更新时间：2024-06-05
- 摘要：With the low sensitivity of beam field and noise-sensitive of high resolution spatial spectrum algorithm,the low location precision under the complex electromagnetic environment becomes a severe problem.The Capon and Root-MUSIC (CRMU) joint algorithm was proposed to research the one-dimensional location technology.The proposed algorithm could not only avoid the high operation caused by the peak search but also suppress the noise,which contributed to reduce the root mean square error (RMSE) of azimuth.Then,the simulation results demonstrate that the RMSE of the proposed algorithm is at least 0.2 degrees less than that of the Root-MUSIC algorithm.In addition,the location error of the proposed algorithm is less than 3% in the practical application of one-dimensional location of shortwave single station,which satisfies the demand that the location error should be below 5%.关键词：location technology;short wave single station location;spatial spectrum estimation;DOA estimation273|767|0更新时间：2024-06-05
- 摘要：Based on the application instance smart relocation scheme proposed by ETSI,a differentiated service based andenhanced scheme was put forward.Four state message synchronization modes were defined according to the number of users to be migrated and the number of services,so that operators could have greater flexibility in handling users and services with different service performance priority requests,providing more choices for differentiated services and billing.关键词：5G;mobile edge computing;handover;relocation;differentiated service652|504|0更新时间：2024-06-05
research and development
- 摘要：The multipath effect,NLOS and other factors,will cause a certain degree of measurement error in ultra-wideband positioning system.Various positioning technologies and their implementation principles were introduced in detail.And focusing on the time difference of arrival（TDOA）technology with better positioning performance,from the model to solve for all kinds of localization algorithm based on TDOA were systematically introduced,including the implementation principle and design process of various algorithms,and the performance analysis of the various algorithms under LOS and NLOS.关键词：UWB indoor positioning;TDOA;NLOS error correction;algorithm analysis976|3887|0更新时间：2024-06-05
summarize
- 摘要：According to the 3GPP specification,a new self-organization network of smart pipe in mobile internet was addressed.By introducing integrated policy control function,the external signals were supervised periodically,and the best optimized network strategies were predicted by the recurrent neural network algorithm,delivered by PCRF,and updated automatically with feedback of the regulations.This solution was effectively applied in scenarios such as speed limit of large traffic users,network protection under high load,and online advertisement recommendation etc.关键词：smart pipe;integrated policy control function;self-organization network;recurrent neural network1462|801|0更新时间：2024-06-05
- 摘要：In order to solve the problems,such as inflexible control and management,the variety of services and complex quality of services,a network slicing resource management scheme based on PFTTH network and corresponding multi-services dynamic resource allocation algorithm based on network-slicing-aware was proposed.Simulation results show that the proposed scheme and algorithm can effectively implement QoS guarantee of different network slicing,significantly increase the network resource utilization.关键词：power fiber to the home;network slicing;dynamic resource allocation477|709|0更新时间：2024-06-05
- 摘要：Firstly,the concept of random events was introduced into the communication process,and the serial and parallel reliability algorithms were introduced.Secondly,the reliability design of virtual hosts,clusters and spine-leaf switching networks and their calculation methods were analyzed.Finally,the connection based on each component unit was analyzed.Based on the connection relationships among the components,the reliability design scheme of virtual nodes and its reliability algorithm was proposed.关键词：reliability index;reliability design;virtualized node276|887|0更新时间：2024-06-05
- 摘要：Lack of the procedure of deploying containerized services in microservice systems,the continuous delivery only put executable codes or programs to the production environment.There is no solution for problems of the test version and configuration updates.The microservice system based on container cloud was proposed.Continuous integration for containerized services and the method that supports debugging tests for multi-version of multi-services were designed.Goals of non-stop production and seamless switch between versions were achieved.These services were monitored and managed by an operation and maintenance platform.After production environment verification,the proposed system supports services running without stop and immediate response and satisfies the needs of production.关键词：container cloud;microservice;continuous delivery;mircoservice monitoring940|1088|0更新时间：2024-06-05
- 摘要：Through the deployment of the internet of things,such as intelligent terminal,sensing sensor etc.,in the intelligent substation,a scene awareness mechanism was established under the mixed conditions to intelligent functions,such as the smart sensing of substation environment,infrastructure support,personnel exchanges,abnormal conditions judgments and other factors,and the multi-dimensional depth perception was realized.Meanwhile,interoperability of the perception network,the establishment of intelligent substation security monitoring system could be achieved by using wired and wireless fusion of multi-state communication technology.The system can multi-dimensionally perceive and monitoring the security of substation environment,which effectively enhances the smart substation intelligent monitoring level to ensure safe and stable operation of the substation.关键词：intelligent substation;security monitoring;polymorphic communication;intelligent analysis774|1522|0更新时间：2024-06-05
- 摘要：With the development of broadband services,fixed broadband access network is at the top speed in construction.Multi-carriers pay more attention on both network scale and ability to keep the necessary advantages in access availability and effectiveness.On the other hand,the network construction is also depended on both the co-operation with service development and the match with fundamental resources.The balance of the above factors is the key role in actual network planning and construction.Considering the present planning method of broadband access network,the bottleneck was analyzed and concluded.Based on multi-dimension geographic grid,the ‘cubic model’,containing services,network ability and fundamental resources,were also developed and introduced.Finally,supported by the big data of network statistic,the model was applied and also verified in actual planning environment on the according self-researched planning platform.关键词：fixed broadband access network;geographic grid;service network co-operation;fundamental resources matching334|500|0更新时间：2024-06-05
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