最新刊期
卷 33 ， 期 4 ， 2017
- 摘要：Network function virtualization (NFV) is an important trend in the development of future network,and is currently the work focus of the world's major standards organizations and open source communities.Network functions virtualization orchestrator (NFVO) is the core function of arranging and managing the NFV network and is the focus for operators and equipment manufacturers.The latest research progress of NFVO related international and domestic standards organizations and open source projects was expatiated,the NFVO system architecture and key components developed by Beijing Research Institute of China Telecom Co.,Ltd.and Jiangsu Branch of China Telecom Co.,Ltd.was expounded and NFVO's challenges in future R＆D and deployment was pointed out based on the existing practice of network.关键词：network function virtualization;network functions virtualization orchestrator;orchestration1322|1686|0更新时间：2024-06-05
- 摘要：CORD open source project provides one implementation reference of unified access edge cloud.On the basis of analysis of influence of CORD project on the existing CO and DC,the core architecture and software stack of CORD were studied.Meanwhile,the integrated reference solution of 5G-oriented mobile scenario and performance analysis was also analyzed.Finally,the reference solution to integrate CORD with other open source was given.关键词：open source;central office re-architected as a datacenter;software defined networking;network function virtulization1028|1612|0更新时间：2024-06-05
- 摘要：Network function virtualization (NFV) and software defined networking (SDN) have been widely recognized as the main direction of the development of the next generation telecom network,and as the brain of the future network,orchestrator is the key for the operators to manage the network flexibly and maximize the advantages of new technologies.Firstly,the core position of orchestrator in the next generation network was described,and the technical architecture of orchestrator was introduced.Then,the development of orchestrator in the perspective of standardization and open source were introduced and analyzed.Finally,the relationship between standardization and open source was elaborated,including the integration of orchestrator and OSS,the support of orchestrator for SDN and the idea to realize the intelligent and automatic network operation relying on orchestrator.关键词：orchestrator;network function virtualization;software defined networking;ETSI;Open-O;ECOMP;OSM;ONAP1564|2445|0更新时间：2024-06-05
- 摘要：There are many problems on traditional WAN,change is imperative,and it is very important to reconstruct WAN,which leads to software defined-wide area network (SD-WAN) reconstructing style.Among the current technology,the definition of SD-WAN,SD-WAN architecture,ODL open platform,protocol of control platform and southern protocol were analyzed and discussed.How to choose specific technology needs to combine technology maturity and application practice to decide.关键词：reconstruct;WAN;SD-WAN1045|1753|0更新时间：2024-06-05
- 摘要：According to the characteristics of SDN/NFV,the future network experiment platform based on SDN/NFV was proposed.The open source architecture of OpenStack and OpenDaylight was used,and the SDN cross-domain communication system,virtual network element management and network service orchestration were researched.Real-time dynamic management and effective sharing of the underlying heterogeneous resources were achieved.At the same time,according to the needs of the experimental users of the network resources,various network resources and SFC service was flexibly orchestrated and end-to-end network experimental verification services were provided to users.关键词：SDN;NFV;virtual network element;network service orchestration1172|1876|0更新时间：2024-06-05
- 摘要：NFV is a core component of the operator network reconstitution,and open source is an important driving force to accelerate the development of NFV.How to use open source technology to promote the application of NFV in telecom network is a major issue faced by operators.NFV open source technology system was surveyed comprehensively according to the NFV reference framework proposed by ETSI,and the background,core technology and development trend of mainstream open source projects of NFVI,VNF and MANO was analyzed.Finally,some critical problems (such as technical bottlenecks,decoupling obstacles and operational difficulties) and corresponding solutions were presented to help operators to make better use of open source technology of NFV.关键词：network function virtualization;open source;decoupling architecture;network reconstitution953|1957|0更新时间：2024-06-05
- 摘要：With the development of the future internet technology,the future network architecture which utilizes network virtualization as a tool to solve the rigidity of traditional network becomes the main stream.As a new network architecture,software defined networking provides an effective network virtualization solution.Firstly,related technology of network virtualization in SDN was concluded,distinguished differences between deploying virtual network in SDN and traditional network was compared,and aiming at the virtual network mapping problem in SDN virtualization platform,a latency sensitive SDN virtualization controller placement algorithm.At last,experiment results show that the algorithm not only can assure the delay between SDN controllers and switches in an acceptable range,but also improve the utilization efficiency of network resources.关键词：software defined networking;network virtualization;virtual network embedding;latency sensitive805|1556|0更新时间：2024-06-05
- 摘要：In recent years,network function virtualization (NFV) is arousing concern widely from both academia and industry due to its flexible deployment and low cost.However,the performance bottleneck becomes increasingly distinctive and hinders the progress of NFV technology.The major factors were studied which could seriously affect the performance of NFV data plane.Firstly,an analysis was conducted on the causes for various kinds of performance overheads.Then,the optimization solutions were summarized to mitigate these overheads.Finally,a brief introduction was made on two types of architecture,which could significantly improve the performance of NFV data plane.关键词：network function virtualization;performance optimization;system architecture806|1285|0更新时间：2024-06-05
Topic:SDN/NFV
- 摘要：D2D communication is a short distance communication mode in the future 5G network.In the process of communication,the information is transmitted from the sender to the receiver directly,without the need to transmit through the base station.The introduction of D2D communication in the traditional cellular network can greatly improve the total throughput of the system,increase the utilization of spectrum resources and reduce the power consumption of the transmitter.A resource allocation method which was used in hybrid D2D cellular network was mainly introduced,spectrum resources was distributed by Lagrange multiplier method combined with simulated annealing algorithm,a consideration of channel capacity and energy consumption of the resource scheduling strategy based on simulated annealing algorithm was put forward.This algorithm was simulated by the simulation platform in Vienna,compared to the traditional greedy optimization algorithm,it can significantly increase the total system throughput and bandwidth utilization and reduce the power consumption.In addition,the distributed algorithm was adopted,that D2D users searched for a suitable target channel and calculated their transmit power according to the algorithm steps,which reduced the signaling overhead of the base station.关键词：D2D communication;resource allocation;Lagrange multiplier method;simulated annealing algorithm;power control762|1701|0更新时间：2024-06-05
- 摘要：A network selection algorithm based on synergetic for heterogeneous wireless network was proposed. The algorithm considered the network selection as a systematic problem. The optional network was a composite system and each kind of service running on the terminal was a subsystem. The entropy of the composite system was obtained according to the concept of entropy and it can reflected the degree of coordination among the subsystems, which in turn reflected the overall performance of the network. The simulation results show that the QoS satisfaction rate of services based on the proposed algorithm is 95%, while the QoS satisfaction rate of services based on the TOPSIS algorithm is only 25%, and the performance of the former is improved by nearly four times, indicating that the problem of multi-service terminal network selection can be solved by the proposed algorithm.关键词：multi-service terminal;synergetic;QoS satisfaction rate;network selection559|1128|0更新时间：2024-06-05
- 摘要：For the roadside unit (RSU) placement problem in vehicular Ad Hoc network (VANET),the deployment scheme of RSU based on connection time was proposed.The scheme find the optimal positions of RSU for maximizing the number of vehicles while ensuring a certain level of connection time under the limited number of RSU.The problem was modeled as a maximum coverage problem,and a binary particle swarm algorithm was designed to solve it.The simulation experiment was carried out with the real Beijing road network map and taxi GPS data.The simulation results show that the algorithm is convergent,stable and feasible.Compared with the greedy algorithm,the proposed scheme can provide continuous network service for more vehicles.关键词：vehicular Ad Hoc network;roadside unit placement;connection time;BPSO algorithm476|1262|0更新时间：2024-06-05
- 摘要：The calculation of the priority of the pixel to be repaired and the determination of the best matching block are based on two basic steps of the texture synthesis image inpainting method.The traditional method is not suitable because it is difficult to determine the confidence in the priority calculation,and it is difficult to search for the best matching block.An image inpainting method based on weighted priority and classification matching was proposed.In the priority model,the exponential function and the normalization function were introduced to optimize the confidence and data items separately,the further benefit of which was a more objective priority of calculation and a more reasonable repair order.Based on the proposed functions,the structure information was used as a measure factor of the search matching block,and the best matching block was selected by the classification and screening method.Experimental results show that the proposed method can shorten the repair time under the condition of obtaining good repair effect.关键词：texture synthesis;image inpainting;priority;matching criteria435|1066|0更新时间：2024-06-05
- 摘要：Communication based train control system (CBTC) is assigned in 2.4 GHz unlicensed band,and is easily interfered by Wi-Fi,which caused several emergency brake accidents in Shenzhen and Beijing.Under identical and adjacent interferences from existing systems,choose appropriate frequency band,working bandwidth and station spacing to improve throughput and emergency brake probability for CBTC system is necessary.Firstly,interference research scenarios were analyzed.Then,safety isolation between CBTC train and interferes through deterministic calculation was calculated.Afterwards,appropriate working bandwidth,frequency band and BS spacing was obtained by comparing system level simulation results,including throughput and emergency brake probability,in different conditions.关键词：CBTC;interference;throughput;emergency brake probability629|1090|0更新时间：2024-06-05
- 摘要：Mid-level features with the semantic information can provide stronger discrimination in the person re-identification than low-level features.But like the low-level features,the mid-level features also use local feature matching methods and easily leads mismatch problem when different pedestrians have similar appearance features in some local areas.Considering the same pedestrians are more similar than different pedestrians in the vertical direction since pedestrians are almost always in a standing position,global vertical appearance constraints was introduced.Furtherly,a method for person re-identification was proposed which fuses the low-level densely patch-matching and the mid-level features with the global vertical appearance constraints.Experimental results show that the proposed algorithm can achieve a higher hit rate than the existing methods on the most challenging public VIPeR database and CUHK01 database.关键词：person re-identification;mid-level feature;apparent constraint503|915|0更新时间：2024-06-05
Research and development
- 摘要：Network function virtualization (NFV) is an obvious change in communication technology,especially for the core network.Firstly,the two level changes between the most obvious and the most far-reaching about element and network construction methods were illustrated and analyzed.In addition,the core network planning generally included the capacity planning and network planning,was closely related to both the NFV cloud,with the decoupling of hardware and software of network element,would change the planning method.Based on this,the effect of NFV on core network element and its planning method in many aspects were illustrated.关键词：network function virtualization;core network;VNF;planning method588|1201|0更新时间：2024-06-05
- 摘要：Network function virtualization (NFV) is the core technology and architecture of telecom-level business to cloud,which is the inevitable trend of future network evolution.NFV brings new capabilities to the communications network,at the same time,it requires new management and orchestration (MANO) capabilities for existing equipment operations,management,maintenance and configuration models.First of all,the network management system architecture and future evolution planning of the physical network element were summarized,and by the coming of NFV technology,the changes of the existing network equipment management method and the new network management architecture and function were concluded.The coordination of NFV MANO and operation support system (OSS),NFV MANO and other peripheral network was deeply researched.Finally,from the perspective of telecom operators,the deployment and evolution strategy of NFV MANO based on decoupling level was suggested.关键词：network function virtualization;management and orchestration;operation support system;coordination;deployment and evolution strategy697|1490|0更新时间：2024-06-05
- 摘要：Central office is the infrastructure for the deployment of communications equipment,and NFV is a telecom cloud with service quality assurance.The needs that collaborative development between core network and computer room was introduced and the status of core network room was analyzed,and the planning of NFV room was proposed from the aspect of transformation strategy of data center and central office and layout of office and quantity planning strategy.关键词：NFV;data center;central office411|1657|0更新时间：2024-06-05
- 摘要：It is a huge market space for narrowband-ineternet of things (NB-IoT),and NB-IoT is the focus of future development direction.The global telecommunications operators have begun to distributed actively.In order to better determine the network deployment of the construction program and resource allocation,from the business scene of NB-IoT,the NB-IoT service characteristics were analyzed,and the NB-IoT core network business model parameters and networking solutions were given,which was of great significance to the follow-up NB-IoT core network resource allocation and planning scheme.关键词：LPWA;NB-IoT;eMTC;service characteristic;service model;networking scheme605|2568|0更新时间：2024-06-05
- 摘要：Based on existing communication network capacity,telecom operators build the capability exposure platform,third-party developers were attracted to develop more colorful personalized communication services to users,new opportunities and challenges was brought to telecom operators.The construction plan and capability exposure pattern of system architecture of capability exposure and IMS network capability platform was analyzed,references of actual deployment for capability exposure were provided.关键词：capability exposure;core network;IP multimedia subsystem410|1403|0更新时间：2024-06-05
- 摘要：In the aspect of service,the biggest difference between IPTV business and internet TV business is IPTV business can provide live business,but in the aspect of system deployment,the requirements of cloud platforms,pipelines,terminals and other parts of the network are different.The development form of TV service and the construction mode of service platform was introduced.The transformation strategy of network and equipment because the operators carried out IPTV business were analyzed from the aspects of platform,CDN,metropolitan area network,converged transmission,PON access,end-to-end multicast,end-to-end QoS and video terminal.关键词：IPTV;internet TV;internet video;4K500|1710|0更新时间：2024-06-05
- 摘要：By analyzing the grading status of data centers at home and abroad and the availability of business systems in the data center,business availability grading recommendations,and business system requirements and configuration recommendations for the data center infrastructure were proposed,thus making the data center infrastructure more rational and reducing the cost of data center.关键词：data center;grading;availability411|1690|0更新时间：2024-06-05
- 摘要：With the development of internet service and IaaS cloud,the PaaS cloud was discussed in the construction and application of IT support systems.How to take into technological evolution and how to build PaaS architecture,were analyzed.How to implement a system of centralized management,supervision,sharing and scheduling was introduced.How to achieve unity of application deployment and how to achieve high availability for data center were discussed.关键词：PaaS;container technology;Docker;Kubernetes988|2383|0更新时间：2024-06-05
- 摘要：Big data is accelerating the application across various industries,the opening of the data will help operators in the internal aggregation and sharing,and help to serve the ever-changing application scenarios,this is important for operators to develop new business.The background of combining big data with cloud computing was analyzed,overall architecture of big data platform for cloud computing was proposed,then the big data open platform implementation scheme was focused on,the platform planning and the problems to be solved in the project were carried out,and the reference for the related researchers were provided.关键词：big data;open platform;cloud computing;PaaS681|1765|0更新时间：2024-06-05
- 摘要：Mobile data traffic increases gradually.Operator's business model is transferring from “telephone traffic management” to “traffic management”.Big data management will become the main development direction of operators.For big data management,operators explore the value and application of DPI technology and make the unified DPI system standards to offer comprehensive and standard traffic data.The insufficiency of traditional DPI deployment mode was analyzed,and the unified DPI system to offer basic data security for accelerating development of big data was presented.关键词：unified DPI;big data;telecom operator1290|2435|0更新时间：2024-06-05
- 摘要：With the development of wired broadband services,new requirements on the carrying ability of network was put forward by video-dominated services.The demand on bandwidth and network quality of wired broadband traffic grooming was analyzed,and a feasible network evolution solution were presented from the perspective of multicast technology application,BRAS and CDN deployment,backbone network architecture evolution and other point of view.关键词：wired broadband service;video service;network flattening;multicast technology;content closer to the user388|1514|0更新时间：2024-06-05
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