The technological development of smart devices and Internet of Things(IoT)has brought ever-larger bandwidth and fluctuating traffic to existing networks.The analy⁃sis of network capital expenditure(CAPEX)is extremely ...The technological development of smart devices and Internet of Things(IoT)has brought ever-larger bandwidth and fluctuating traffic to existing networks.The analy⁃sis of network capital expenditure(CAPEX)is extremely important and plays a fundamen⁃tal role in further network optimizing.In this paper,an adaptability analysis is raised for IP switching and optical transport network(OTN)switching in CAPEX when the service bandwidth is fluctuating violently.This paper establishes a multi-layer network architec⁃ture through Clos network model and discusses impacts of maximum allowable blocking rate and service bandwidth standard deviation on CAPEX of IP network and OTN network to find CAPEX demarcation point in different situations.As simulation results show,when the bandwidth deviation mean rate is 0.3 and the maximum allowable blocking rate is 0.01,the hardware cost of OTN switching will exceed IP switching as the average band⁃width is greater than 6100 Mbit/s.When the service bandwidth fluctuation is severe,the hardware cost of OTN switching will increase and exceed IP switching as the single port rate is allowed in optical switching.The increasing of maximum allowable blocking rate can decrease hardware cost of OTN switching.Finally,it is found that Flex Ethernet(FlexE)can be used to decrease CAPEX of OTN switching greatly at this time.展开更多
随着光传送网(Optical Transport Network,OTN)技术的快速发展,如何实现不同技术下的调度模型的统一,已成为一个重要的研究课题。本文通过对OTN网络各类光交换技术的研究,提出了一种基于不同技术下统一建模的方法,旨在适配不同技术的OT...随着光传送网(Optical Transport Network,OTN)技术的快速发展,如何实现不同技术下的调度模型的统一,已成为一个重要的研究课题。本文通过对OTN网络各类光交换技术的研究,提出了一种基于不同技术下统一建模的方法,旨在适配不同技术的OTN网络,形成统一的底层OTN模型,加强OTN调度算法的扩展性,扩大OTN网络调度适用范围,提高资源利用率,并降低维护和运营成本。展开更多
基金This work was supported by National Key Research and Development Program(2018YFB1800504)and the ZTE Research Fund,China.
文摘The technological development of smart devices and Internet of Things(IoT)has brought ever-larger bandwidth and fluctuating traffic to existing networks.The analy⁃sis of network capital expenditure(CAPEX)is extremely important and plays a fundamen⁃tal role in further network optimizing.In this paper,an adaptability analysis is raised for IP switching and optical transport network(OTN)switching in CAPEX when the service bandwidth is fluctuating violently.This paper establishes a multi-layer network architec⁃ture through Clos network model and discusses impacts of maximum allowable blocking rate and service bandwidth standard deviation on CAPEX of IP network and OTN network to find CAPEX demarcation point in different situations.As simulation results show,when the bandwidth deviation mean rate is 0.3 and the maximum allowable blocking rate is 0.01,the hardware cost of OTN switching will exceed IP switching as the average band⁃width is greater than 6100 Mbit/s.When the service bandwidth fluctuation is severe,the hardware cost of OTN switching will increase and exceed IP switching as the single port rate is allowed in optical switching.The increasing of maximum allowable blocking rate can decrease hardware cost of OTN switching.Finally,it is found that Flex Ethernet(FlexE)can be used to decrease CAPEX of OTN switching greatly at this time.
文摘随着光传送网(Optical Transport Network,OTN)技术的快速发展,如何实现不同技术下的调度模型的统一,已成为一个重要的研究课题。本文通过对OTN网络各类光交换技术的研究,提出了一种基于不同技术下统一建模的方法,旨在适配不同技术的OTN网络,形成统一的底层OTN模型,加强OTN调度算法的扩展性,扩大OTN网络调度适用范围,提高资源利用率,并降低维护和运营成本。
