L2/L3 equipment deployment scheme in PTN network architecture by Xu DENG

“…Relying on technological superiority,packet transport network（PTN）technology has become the main force in the construction of the transport network.In the early PTN network architecture,the L2/L3 equipment was deployed in the core layer.Therefore,it will face two challenges of poor security and low network performance.Based on China Mobile’s current network,the new PTN architecture which L2/L3 equipment deployed in the convergence layer was proposed,and compared the network security and load capacity with L2/L3 equipment deployment in different level.The result shows that the new PTN architecture is better in terms of network security and efficiency.…”
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Research and practice of OTN controller northbound unified interface model by Yanxia TAN, Yanlei ZHENG, Guangquan WANG, He ZHANG

“…In the software defined optical transport network (SDOTN) architecture, the manufacturer’s controller system is required to be connected to the optical transport network (OTN) orchestrator system through the northbound interface.However, there is currently no unified northbound interface standard, which brings many problems to the automatic provisioning of cross-domain and cross-vendor end-to-end services in SDOTN.The status and problems of OTN controller northbound open interface standards were expounded, and the current mainstream transport application programming interface (TAPI) and abstraction and control of traffic engineering network (ACTN) northbound interface standards from the perspective of network models were compared and analyzed.Finally, the research practice of China Unicom in the standardization of ACTN unified interface model and the construction of management and control system were introduced, and an outlook on the follow-up research and development direction was provided.…”
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Research on key technologies and applications of fgOTN for the new electric power system by TANG Rui, GUANG Zejing, TANG Jia, GUO Xiaoxi, ZHAO Junfeng

“…In view of the problems of low carrier efficiency for customer signals below 1 Gbit/s in existing optical transport network (OTN) networks, the fine grain optical transport network (fgOTN) technical system that provides fine grain service bearers had been analyzed, and the technical advantages and feasibility of fgOTN based on key technical solutions and experimental data had also been validated. …”
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LE RÔLE DE L’INFRASTRUCTURE DE TRANSPORT DANS LA FRAGMENTATION DES PAYSAGES NATURELS DES RÉSERVES NATURELLES L’EPICÉA DE RÉSONANCE DE LĂPUŞNA (LES CARPATES ORIENTALES) ET LES HAUTS... by OLGA BĂLTESCU

“…The major premise of this article is: accessibility in natural reserves could become a risk factor for protected natural elements, if the ways of access inside of natural reserve are not correlated with the preserve purposes. Moreover, the transport network density and quality are elements, which lead to landscape fragmentation. …”
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Review of the application of fgOTN in the interconnection of artificial intelligence data centers by SHI Qingna, WANG Jiaxue, LI Shiyu, CAI Mengru, LIU Xiaodong, YIN Shan, HUANG Shanguo

“…The fine grain optical transport network (fgOTN), which serves as a continuation of synchronous digital hierarchy (SDH) technology and an extension of optical transport network (OTN) technology, is applied in the interconnection of artificial intelligence data centers to meet their multiple requirements for flexible scheduling, efficient transmission, strict security isolation, and low latency. …”
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Necessity Analysis of Access Layer OTN Construction by Zerong Deng, Yanbin Liu, Quanxin Hou

“…It suggests that building the access layer OTN system is an ideal choice for bearing the multi-services for the local transport network access layer.…”
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Discussion on the issues of applying OTN in power grid communications by Xinnan CHEN, Weihua LIAN, Yining MA

“…With the gradual increase in the demand for communication bandwidth in the electric power grid, the application of optical transport network (OTN) in electric power communication has become increasingly extensive and in-depth.A series of problems to be solved have been found in the application process.The long-haul transmission problem, the interruption problem of OTN with polarization multiplexing carried by OPGW which is caused by lightning strikes, the problem of mismatch between trend of service requirement development and functions combination of OTN equipment.The background and principles of the above three issues were briefly sorted out and introduced.The forward and backward Raman amplifiers and remote optical pumping amplifiers were applied in the practical OTN system construction project.Theoretical calculations of the optical power distribution along the fiber were carried out and verified by field measured data, which quantitatively proved the gain of amplifiers mentioned above on the single-span transmission distance of OTN systems.The speed of the rotation of SOP caused by natural lightning strikes was theoretically estimated and measured in the practical OTN system.A test method for the SOP tracking ability of the OTN systems was proposed and carried out.An idea of applying the pakect optical transport network (POTN) to imporve the flexibility of OTN bandwidth administration was proposed.…”
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Travel Demand-Based Assignment Model for Multimodal and Multiuser Transportation System by Bingfeng Si, Xuedong Yan, Hunjun Sun, Xiaobao Yang, Ziyou Gao

“…Simultaneously, the bi-equilibrium patterns for multimodal transport network are proposed by extending Wardrop principle. …”
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Research on the applicability of SDN technical architecture by Xianhui CHEN, Yiting CAI, Mengxian CHEN, You WANG

“…Firstly, several software defined network (SDN) architectures and their key technologies were introduced.Secondly, technical research on the applicability of these SDN architectures in optical transport network (OTN) on several key aspects such as network layering and network abstraction, southbound interface protocol selection, and path computation element (PCE) function integration was conductd and analyzed.Finally, guiding opinions and suggestions on the migration of the existing OTN network to these SDN technical architectures were given.…”
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Research on Network Optimization Strategy of Ultra-Broadband CMNet Metro Network by Quanze Jiang, Zhiyuan Lai, Fangrong Chen

“…From the competitive situation of internet broadband services in domestic operators，CMNet MAN business network architecture situation and existing problems were analyzed combined with the trends of the broadband business application development.The plaftorm construction of optimizing resource control mobile CMNet MAN was raised under conditions of ultra-broadband，and the sink service control layer BRAS and aggregation switches，optimized WLAN bearer，the CMNet metro and transport network joint networking strategy were also proposed.…”
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Optical layer key technology and networking scheme based on SPN by Qian CAI, Han LI, Dechao ZHANG, Wen YE, Tingting ZHANG, Dong WANG, Yunbo LI, Liuyan HAN, Yang ZHAO

“…The large-scale deployment of 5G brings bandwidth and lower delay requirements to transport network.As a 5G oriented multi-service transport platform,SPN will transport wireless service,home broadband service,enterprise service and private line service.SPN distribution layer and core layer network will need huge bandwidth and support long range transport.The SPN optical layer key technology and network scheme were studied,also implemented to verify the function and performance of SPN optical layer.…”
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Research on key technology and network deployment of fgOTN by LIAO Shangjin

“…Starting with the technical development of fine grain optical transport network (fgOTN), the key technical schemes of fgOTN were focused on, network planning was studied, and the application scenarios of fgOTN were explored. …”
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Power PTN security comprehensive evaluation based on power application by Lidan GAO, Fengjie SUN, Guojun LIU, Jianqi LI

“…Abstract:Traditional multi service transport network based on SDH has a low adaptability to the data service and flexibility.PTN technology which makes up the deficiency of the original SDH network is a good supplement to SDH network.According to the requirements of security performance in PTN equipment,the technology and theory of multi index comprehensive evaluation was studied by referring to the relevant standards,the key evaluation index of power PTN security performance test was put forward.Finally,the security performance of the three models was evaluated by using the analytic hierarchy process and fuzzy evaluation system,and the feasibility of the evaluation system was verified.…”
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RWA algorithm based on cost of photoelectric conversion device by Daoyun HU, Zhentai YANG, Qianchun LU, Jin QI

“…Over the past decade,carrier operator implement fine-grained traffic scheduling in optical transport network(OTN) by deploying optical-electric conversion(OEO) devices on ROADM,which can improve the spectrum utilization.However,OEO device is very expensive,which will increase the CAPEX and OPEX of carrier operator.A problem about traffic scheduling and the deployment of OEO devices in OTN was proposed.Then,the ILP model of this problem was built and it was proved NP-hard.Additionally,two novel algorithms named OEO-RWA and SA-RWA were proposed.At last,these algorithms were demonstrated can not only ensure flexibility of traffic scheduling,but also can reduce the number of OEO device through simulation.…”
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Current and upcoming development in basic research of measurable, controllable and manageable IP network by MENG Luo-ming1, XIE Gao-gang2, QIU Xue-song1, LI Hui 3, LONG Ke-ping4, YANG Yi-xian1, ZENG Lie-guang5

“…Two type of boundary condition including the boundary condition between IP network and service （application ）, the boundary condition between IP network and optical transport network was given.…”
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OSU based M-OTN technology innovation and verification by Ruiquan JING, Xiaoli HUO, Junjie LI, Yi DING

“…As many carriers are stopping SDH/MSTP investment, OTN networks will replace SDH networks gradually and extend to the edge of the metro network, thus introducing new requirements for OTN technologies.In view of the challenges and new services requirements of the development of the metro optical transport network, the M-OTN technology with the optical service unit (OSU) as the core and optimized for the metro application was proposed.The progress of standardization and main contents of OSU technical standards were introduced, including OSU frame structure and overheads, OSU management frames, OSU hitless bandwidth adjustment mechanism.The consideration on M-OTN equipment types and existing network evolution strategy was given.The M-OTN prototype systems from mainstream manufacturers were tested.Test results show that OSU technology has significant advantages in latency, hitless bandwidth adjustment and transport efficiency.…”
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Research on Green Transport Mode of Chinese Bulk Cargo Based on Fourth-Party Logistics by Jixiao Wu, Yinghui Wang, Wenlu Li, Haixia Wu

“…This paper improves the particle swarm optimization algorithm to compare the integrated cost and carbon emissions of different bulk fourth-party transport networks to verify the benefits of the fourth-party logistics on bulk cargo transport networks’ cost reduction and emission reduction. …”
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As estratégias da logística contemporânea como instrumento de ordenamento territorial na reconversão em Nord e Pas-de-Calais (França) by Mauricio Aquilante Policarpo, Rita de Cássia Martins de Souza

“…It is of fundamental importance to understand the strategies of contemporary logistics in the articulation of Nord and Pas-de-Calais as nodes of the European transport network, in which the interests of local, national and global economic agents collide.…”
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Pratiques d'une métropole émergente par les usagers des transports en commun, le cas du Cap, Afrique du Sud by Solène Baffi

“…The study of the maids' mobilities enables to enlighten these socio-spatial changes, especially through the observation of their practice of the transport network, the strategies they adopt to move and through their experience of the transport space.…”
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Models of distribution of public transport correspondence by T. N. Sakulyeva

“…The paper carries out a comparative analysis of two route models: 1) based on the intervals, where input information about each route is limited to its tracking by the transport network graph, the sequence of stops, the times of movement between stops and the frequencies of movement of vehicles; 2) based on schedules, that use detailed information about the schedules of vehicles along routes (arrival time and departure time for each stop). …”
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