1 Technical Features of ZTE’sDWDM SystemThe toll backbone wave division equipmentof ZXWM M900 backbone transmissionplatform is well designed forlarge-capacity optical transmission. It canfully satisfy the networking ...1 Technical Features of ZTE’sDWDM SystemThe toll backbone wave division equipmentof ZXWM M900 backbone transmissionplatform is well designed forlarge-capacity optical transmission. It canfully satisfy the networking and managementrequirements of diversified users and be fit forvarious toll backbone networks. The systemsupports up to 40 working wavelengths and up to400 Gb/s transmission capacity, and thewavelength selection and interval are in strictcompliance with ITU-T Recommendations. It展开更多
Due to the vulnerability of fibers in optical networks, physical- layer attacks targeting photon splitting, such as eavesdrop- ping, can potentially lead to large information and revenue loss. To enhance the existing ...Due to the vulnerability of fibers in optical networks, physical- layer attacks targeting photon splitting, such as eavesdrop- ping, can potentially lead to large information and revenue loss. To enhance the existing security approaches of optical networks, a new promising technology, quantum key distribu- tion (QKD), can securely encrypt services in optical networks, which has been a hotspot of research in recent years for its characteristic that can let clients know whether infomlation transmission has been eavesdropped or not. In this paper, we apply QKD to provide secret keys for optical networks and then introduce the architecture of QKD based optical net- work. As for the secret keys generated by QKD in optical net- works, we propose a re-transmission mechanism by analyzing the security risks in QKD-based optical networks. Numerical results indicate that the proposed re-transmission mechanism can provide strong protection degree with enhanced attack protection. Finally, we illustrated some future challenges in QKD-based optical networks.展开更多
为提升网络的传输效率和传输质量,研究基于软件定义光传送网(Software Optical Transport Network,SoTN)技术和第五代移动通信技术(5th Generation Mobile Communication Technology,5G)的传输组网技术。首先分析了5G传输网端到端架构...为提升网络的传输效率和传输质量,研究基于软件定义光传送网(Software Optical Transport Network,SoTN)技术和第五代移动通信技术(5th Generation Mobile Communication Technology,5G)的传输组网技术。首先分析了5G传输网端到端架构存在的优势及不足,其次采用SOTN技术和5G网络切片技术设计了一种传输组网方案,最后进行实验分析。测试结果表明,该传输组网技术具有较好的应用效果,数据包的传输成功率均在90.00%以上,并且端到端的最大时延为16.11ms,能够保证网络的传输效果。展开更多
In this paper, we propose an optical burst network architecture supporting the ge- netic mesh topology. The intermediate node architecture of the mesh network can be the same with current wavelength switching Wave- le...In this paper, we propose an optical burst network architecture supporting the ge- netic mesh topology. The intermediate node architecture of the mesh network can be the same with current wavelength switching Wave- length Division Multiplexing (WDM) net- works, and thus can reuse existing deployed infrastructure. We employ a novel Optical Time Slot Interchange (OTSI) at the source nodes for the first time to mitigate the burst conten- tion and to increase the bandwidth utilization. Time- and wavelength-domain reuse in the OTSI significantly saves optical components and red- uces blocking probability.展开更多
Given a set of lightpath connection requests in an all-10 Gb/s optical dense wavelength division multiplexed (DWDM) Ethernet network, lightpaths are designed. In addition the wavelength channels are assigned subject t...Given a set of lightpath connection requests in an all-10 Gb/s optical dense wavelength division multiplexed (DWDM) Ethernet network, lightpaths are designed. In addition the wavelength channels are assigned subject to minimization of the channel blocking and provisional requests satisfying the limits due to accumulative linear dispersion effects over the hops. This paper proposes a routing and wavelength assignment scheme for DWDM long-haul optical networks that includes routing, assignment and reservation of different wavelength channels operating under the Generalized Multiprotocol Label Switching (GMPLS) environment. The GMPLS framework can offer an approach to implement IP over DWDM with variable weighting assignments of routes based on the limitations due to residual dispersion accumulated on the lightwave path. The modeling is implemented under the framework of an object-oriented modeling platform OMNeT++. Network performance tests are evaluated based mainly on a long-haul terrestrial fiber mesh network composed of as well as three topologies structured as chain, ring, and mesh configurations. Blocking probability of lightpath connection requests are examined with the average link utilization in the network employing variable number of wavelength channels in association with the limits of route distance due to linear chromatic and polarization mode dispersion effects.展开更多
在电力通信传输系统中,综合不同的运行工况、科学配置电力设备,并合理应用光传送网(Optical Transport Network,OTN)技术可以改善电力通信传输网络的整体性能。基于此,在智能电网建设发展中,主要简述OTN技术,讨论OTN技术在电力通信传输...在电力通信传输系统中,综合不同的运行工况、科学配置电力设备,并合理应用光传送网(Optical Transport Network,OTN)技术可以改善电力通信传输网络的整体性能。基于此,在智能电网建设发展中,主要简述OTN技术,讨论OTN技术在电力通信传输网络中的问题,基于色散、波长等因素,提出OTN技术的网络结构和拓扑、网络路由和光放大器系统优化措施。展开更多
在信息技术快速发展的背景下,通信网络也在不断进步,以满足日益增长的数据需求,提供更可靠、更高效的服务。在不断创新的过程中,PTN(Packet Transport Network)和OTN(Optical Transport Network)的混合组网方法以及光传送网络架构,逐渐...在信息技术快速发展的背景下,通信网络也在不断进步,以满足日益增长的数据需求,提供更可靠、更高效的服务。在不断创新的过程中,PTN(Packet Transport Network)和OTN(Optical Transport Network)的混合组网方法以及光传送网络架构,逐渐成为当前通信网络设计和优化的焦点之一。文中探讨了PTN-OTN混合组网方法及光传送网络架构。展开更多
文章深入研究了光纤传输接入网络中光传送网(Optical Transport Network,OTN)技术的应用。详细介绍了OTN技术,包括其特点和组成等内容,并分析了OTN技术在光纤传输接入网络中的应用。本研究为理解和应用OTN技术性提供了坚实的理论和实践...文章深入研究了光纤传输接入网络中光传送网(Optical Transport Network,OTN)技术的应用。详细介绍了OTN技术,包括其特点和组成等内容,并分析了OTN技术在光纤传输接入网络中的应用。本研究为理解和应用OTN技术性提供了坚实的理论和实践基础。展开更多
在现代社会,电力通信传输网络的重要性日益凸显,不仅关系到电力系统的正常运行,还直接影响着我国经济的可持续发展。为提升电力通信传输网络的质量,文章将通过理论与实践相结合的方法,深入探讨运用光传送网(Optical Transport Network,O...在现代社会,电力通信传输网络的重要性日益凸显,不仅关系到电力系统的正常运行,还直接影响着我国经济的可持续发展。为提升电力通信传输网络的质量,文章将通过理论与实践相结合的方法,深入探讨运用光传送网(Optical Transport Network,OTN)技术优化电力通信传输网络的方案。首先,简单介绍OTN技术的原理;其次,分析基于OTN技术的电力通信传输网络优化策略;最后,探讨基于OTN技术的电力通信传输网络优化案例。展开更多
光传送网(Optical Transport Network,OTN)技术通过高效的数据封装、传输和错误纠正机制,提升电力通信传输网络带宽利用率和网络可靠性,满足电力行业对高标准通信传输的需求。文章详细解析OTN技术的关键特性和核心架构,基于技术优化需求...光传送网(Optical Transport Network,OTN)技术通过高效的数据封装、传输和错误纠正机制,提升电力通信传输网络带宽利用率和网络可靠性,满足电力行业对高标准通信传输的需求。文章详细解析OTN技术的关键特性和核心架构,基于技术优化需求,从高效路由、OTN帧结构与网络性能优化及自动恢复机制等方面深入探讨基于OTN技术的电力通信传输网络优化方法,并进行应用测试,结果表明基于OTN技术的电力通信传输网络优化方法能够显著提升电力通信传输网络在实际运营中的稳定性和运行效率。展开更多
在信息技术飞速发展和通信网络日新月异的今天,传输设备在现代通信系统中有着举足轻重的地位。分组传送网(Packet Transport Network,PTN)和光传输网络(Optical Transport Network,OTN)是目前两大主流的传输技术,可满足人们对高速、大...在信息技术飞速发展和通信网络日新月异的今天,传输设备在现代通信系统中有着举足轻重的地位。分组传送网(Packet Transport Network,PTN)和光传输网络(Optical Transport Network,OTN)是目前两大主流的传输技术,可满足人们对高速、大容量、低延迟的业务需求。因此,文章综合分析PTN和OTN传输设备,探讨其优劣势及未来发展趋势,旨在给相关领域决策者与研究人员提供参考,推动通信网络不断创新与发展。展开更多
探讨同步传输技术在千兆光网络中的实际应用情况。通过介绍同步传输技术的基本概念,深入讨论超400G光传输网络面临的挑战及其在光传送网(Optical Transport Network,OTN)中的应用前景。研究重点分析调制与解码技术、自适应调整等关键技...探讨同步传输技术在千兆光网络中的实际应用情况。通过介绍同步传输技术的基本概念,深入讨论超400G光传输网络面临的挑战及其在光传送网(Optical Transport Network,OTN)中的应用前景。研究重点分析调制与解码技术、自适应调整等关键技术,并提出改善信号强度、纠正色散问题、克服光纤内非线性影响以及提高光放大器效率的方法。在研究过程中,还优化了前向纠错机制和错误率控制策略,以推动相干传输技术在400G OTN网络中的应用,提高光网络传输效率和扩展容量。展开更多
为优化光纤传输质量,满足宽带接入的可控化管理需求,要严格遵循光纤传输应用控制的技术规范,有效建立基于光传送网(Optical Transport Network,OTN)技术的光纤传输接入网络,从而维系信息传输的及时性,搭建完整的技术运行框架。应从大颗...为优化光纤传输质量,满足宽带接入的可控化管理需求,要严格遵循光纤传输应用控制的技术规范,有效建立基于光传送网(Optical Transport Network,OTN)技术的光纤传输接入网络,从而维系信息传输的及时性,搭建完整的技术运行框架。应从大颗粒信息传输处理、城域核心网和干线网络、宽带用户接入、长途网应用交叉设备等方面对OTN技术的具体应用内容进行系统化分析,更好地实现网络性能的平滑升级,从而满足城域网建设的具体需求。因此,系统研究光纤传输接入网络中OTN技术的应用要点具有现实意义。展开更多
文摘1 Technical Features of ZTE’sDWDM SystemThe toll backbone wave division equipmentof ZXWM M900 backbone transmissionplatform is well designed forlarge-capacity optical transmission. It canfully satisfy the networking and managementrequirements of diversified users and be fit forvarious toll backbone networks. The systemsupports up to 40 working wavelengths and up to400 Gb/s transmission capacity, and thewavelength selection and interval are in strictcompliance with ITU-T Recommendations. It
基金supported in part by NSFC project(Grant No.61571058and 61601052)Science and Technology Project of State Grid Corporation of China:The Key Technology Research of Elastic Optical Network(Grant No.526800160006)+1 种基金China Postdoctoral Science Foundation Project(2016M600970)ZTE Industry-Academia-Research Cooperation Funds
文摘Due to the vulnerability of fibers in optical networks, physical- layer attacks targeting photon splitting, such as eavesdrop- ping, can potentially lead to large information and revenue loss. To enhance the existing security approaches of optical networks, a new promising technology, quantum key distribu- tion (QKD), can securely encrypt services in optical networks, which has been a hotspot of research in recent years for its characteristic that can let clients know whether infomlation transmission has been eavesdropped or not. In this paper, we apply QKD to provide secret keys for optical networks and then introduce the architecture of QKD based optical net- work. As for the secret keys generated by QKD in optical net- works, we propose a re-transmission mechanism by analyzing the security risks in QKD-based optical networks. Numerical results indicate that the proposed re-transmission mechanism can provide strong protection degree with enhanced attack protection. Finally, we illustrated some future challenges in QKD-based optical networks.
文摘为提升网络的传输效率和传输质量,研究基于软件定义光传送网(Software Optical Transport Network,SoTN)技术和第五代移动通信技术(5th Generation Mobile Communication Technology,5G)的传输组网技术。首先分析了5G传输网端到端架构存在的优势及不足,其次采用SOTN技术和5G网络切片技术设计了一种传输组网方案,最后进行实验分析。测试结果表明,该传输组网技术具有较好的应用效果,数据包的传输成功率均在90.00%以上,并且端到端的最大时延为16.11ms,能够保证网络的传输效果。
文摘In this paper, we propose an optical burst network architecture supporting the ge- netic mesh topology. The intermediate node architecture of the mesh network can be the same with current wavelength switching Wave- length Division Multiplexing (WDM) net- works, and thus can reuse existing deployed infrastructure. We employ a novel Optical Time Slot Interchange (OTSI) at the source nodes for the first time to mitigate the burst conten- tion and to increase the bandwidth utilization. Time- and wavelength-domain reuse in the OTSI significantly saves optical components and red- uces blocking probability.
文摘Given a set of lightpath connection requests in an all-10 Gb/s optical dense wavelength division multiplexed (DWDM) Ethernet network, lightpaths are designed. In addition the wavelength channels are assigned subject to minimization of the channel blocking and provisional requests satisfying the limits due to accumulative linear dispersion effects over the hops. This paper proposes a routing and wavelength assignment scheme for DWDM long-haul optical networks that includes routing, assignment and reservation of different wavelength channels operating under the Generalized Multiprotocol Label Switching (GMPLS) environment. The GMPLS framework can offer an approach to implement IP over DWDM with variable weighting assignments of routes based on the limitations due to residual dispersion accumulated on the lightwave path. The modeling is implemented under the framework of an object-oriented modeling platform OMNeT++. Network performance tests are evaluated based mainly on a long-haul terrestrial fiber mesh network composed of as well as three topologies structured as chain, ring, and mesh configurations. Blocking probability of lightpath connection requests are examined with the average link utilization in the network employing variable number of wavelength channels in association with the limits of route distance due to linear chromatic and polarization mode dispersion effects.
文摘在电力通信传输系统中,综合不同的运行工况、科学配置电力设备,并合理应用光传送网(Optical Transport Network,OTN)技术可以改善电力通信传输网络的整体性能。基于此,在智能电网建设发展中,主要简述OTN技术,讨论OTN技术在电力通信传输网络中的问题,基于色散、波长等因素,提出OTN技术的网络结构和拓扑、网络路由和光放大器系统优化措施。
文摘在信息技术快速发展的背景下,通信网络也在不断进步,以满足日益增长的数据需求,提供更可靠、更高效的服务。在不断创新的过程中,PTN(Packet Transport Network)和OTN(Optical Transport Network)的混合组网方法以及光传送网络架构,逐渐成为当前通信网络设计和优化的焦点之一。文中探讨了PTN-OTN混合组网方法及光传送网络架构。
文摘在现代社会,电力通信传输网络的重要性日益凸显,不仅关系到电力系统的正常运行,还直接影响着我国经济的可持续发展。为提升电力通信传输网络的质量,文章将通过理论与实践相结合的方法,深入探讨运用光传送网(Optical Transport Network,OTN)技术优化电力通信传输网络的方案。首先,简单介绍OTN技术的原理;其次,分析基于OTN技术的电力通信传输网络优化策略;最后,探讨基于OTN技术的电力通信传输网络优化案例。
文摘光传送网(Optical Transport Network,OTN)技术通过高效的数据封装、传输和错误纠正机制,提升电力通信传输网络带宽利用率和网络可靠性,满足电力行业对高标准通信传输的需求。文章详细解析OTN技术的关键特性和核心架构,基于技术优化需求,从高效路由、OTN帧结构与网络性能优化及自动恢复机制等方面深入探讨基于OTN技术的电力通信传输网络优化方法,并进行应用测试,结果表明基于OTN技术的电力通信传输网络优化方法能够显著提升电力通信传输网络在实际运营中的稳定性和运行效率。
文摘在信息技术飞速发展和通信网络日新月异的今天,传输设备在现代通信系统中有着举足轻重的地位。分组传送网(Packet Transport Network,PTN)和光传输网络(Optical Transport Network,OTN)是目前两大主流的传输技术,可满足人们对高速、大容量、低延迟的业务需求。因此,文章综合分析PTN和OTN传输设备,探讨其优劣势及未来发展趋势,旨在给相关领域决策者与研究人员提供参考,推动通信网络不断创新与发展。
文摘探讨同步传输技术在千兆光网络中的实际应用情况。通过介绍同步传输技术的基本概念,深入讨论超400G光传输网络面临的挑战及其在光传送网(Optical Transport Network,OTN)中的应用前景。研究重点分析调制与解码技术、自适应调整等关键技术,并提出改善信号强度、纠正色散问题、克服光纤内非线性影响以及提高光放大器效率的方法。在研究过程中,还优化了前向纠错机制和错误率控制策略,以推动相干传输技术在400G OTN网络中的应用,提高光网络传输效率和扩展容量。
文摘为优化光纤传输质量,满足宽带接入的可控化管理需求,要严格遵循光纤传输应用控制的技术规范,有效建立基于光传送网(Optical Transport Network,OTN)技术的光纤传输接入网络,从而维系信息传输的及时性,搭建完整的技术运行框架。应从大颗粒信息传输处理、城域核心网和干线网络、宽带用户接入、长途网应用交叉设备等方面对OTN技术的具体应用内容进行系统化分析,更好地实现网络性能的平滑升级,从而满足城域网建设的具体需求。因此,系统研究光纤传输接入网络中OTN技术的应用要点具有现实意义。