基于EPON的可控组播技术

以太无源光网络( EPON)作为光纤到户的理想解决方案之一,凭借其带宽优势非常适合承载组播业务.EPON可控组播技术结合EPON的特点,从安全性和可维护性考虑,提出了一套可控组播实现方案,包括组播源管理、用户认证和组播流量控制等内容,以满足组播业务可维、可控的运营管理需要.     

EPON系统中的组播技术

文章首先讨论了在以太网无源光网络(EPON)系统上实现组播的现实意义,然后在对现有的二层组播协议分析与比较的基础上,提出采用IGMP Snooping(英特网组管理协议侦听)在EPON上实现组播,并结合EPON自身的特点,提出了实现方案,最后详细描述了光线路终端(OLT)和光网络单元(ONU)是如何支持IP组播业务的.     

基于10 G EPON的IPTV可控组播的实现方式研究

10 G EPON被称为下一代PON(NG PON)技术,能更好地满足三网融合条件下IPTV等视频业务的高带宽接入需求.为了在10 G EPON系统上承载IFTTV组播业务,需要引入可控组播技术,对10 G EPON系统的组播方式进行控制.主要研究了10 GEPON系统中IPTV可控组播的实现原理及流程,提出,了基于I...     

EPON中组播协议的实现

探讨了EPON中实现IP组播业务的方法,详细描述了OLT和ONU对IP组播业务数据报的处理过程,以及对EPON用户终端设备加入、离开组播组的IGMP协议帧的处理过程     

EPON系统中IGMP Proxy技术实现方案

提出了一种基于VLAN的EPON系统组播实现方案,满足当前宽带接入网中有效传输组播业务的需求.该方案充分利用ONU端的IGMP Proxy技术,大大降低了IGMP控制报文在EPON系统、上端核心网中的流量.仿真显示了该方案在IGMP控制报文网络流量上的性能大幅提高和优越性.     

IGMP Snooping在EPON宽带接入网中的实现

提出一套IGMP Snooping在EPON系统中的实现方案,详细地描述了IGMP Snooping的实现过程,并给出相应的测试方法.测试结果显示IGMP Snooping能在EPON系统中很好地支持IP组播业务.     

一种改进的EPON系统组播实现方案

在对现有的二层组播协议分析与比较的基础上提出采用IGMP Snooping协议在EPON中实现组播.结合组播逻辑链路标识(LLID)以及操作管理维护(OAM)帧的运用.探讨一种改进的EPoN组播实现方案.     

EPON系统中高效视频组播的实现方法

采用EPON系统的宽带接入网络可以为每个用户提供较高带宽,并且能较好地支持组播功能,是视频组播业务重要的用户接入手段。提供一种在EPON系统中实现高效率纽播的方法,充分发挥EPON网络点到多点结构的特点,使同一个组播组的用户共享一条流,从而提高下行带宽的利用率。     

组播技术在EPON系统中的应用

采用EPON系统的宽带接入网络可以为每个用户提供较高带宽,并且能较好地支持组播功能,是视频组播业务重要的用户接入手段。在EPON系统中应用组播,可以充分发挥EPON网络点到多点结构的特点,使同一个组播组的用户共享一条流,从而提高下行带宽的利用率。     

组播技术在IPTV中的应用

随着网络技术的发展,IP技术已经成为核心网络承载技术的事实标准。传统业务在IP网络中的开展日趋成为广大研究人员以及各大运营商关注的热点。本文简要介绍了承载在IP网络上的电视业务(网络电视)的基本概念,重点研究了组播技术在网络电视中的应用．并从组网方式、频道快速切换方法、安全、计费以及源特定组播五个方面进行分析并给出了相应的解决策略。     

EPON接入网中的组播实现

简要介绍了EPON技术及IP组播技术,然后阐述了EPON设备的组播实现原理和动态组播控制技术,并基于国内运营商的城域网架构,给出了城域网的EPON组播部署方案。     

采用多LLID技术的EPON综合接入系统

采用远端光网络单元（ONU）设备和多逻辑链路标识（LLID）的技术,将以太网无源光网络（EPON）系统的多业务管理和远端设备管理融入新的框架,并通过将服务等级协议（SLA）与链路相联系,将业务在链路上分流,使得系统的带宽保证和严格的时延抖动控制成为可能,从而克服了以太网传送体制只能“尽力转发”的不足,较好地解决了多种业务综合接入能力的问题。     

Controllable multicast for IPTV over EPON

The character of 1 Gbps bandwidth and tree-based structure make Ethernet passive optical network (EPON) very suitable for broadcast or multicast services such as Internet protocol television video (IPTV). The document proposed a novel scheme, based on the former research for controllable multicast over EPON system, mainly considering system security and maintainability. It can both control the IPTV program source's and the receiver's validity, improving the efficiency and precision.     

Resources allocation in an Intserv/Diffserv integrated EPON system

As one of the most promising next-generation access network techniques, the user-oriented Ethemet passive optical network (EPON) should pay more attention to its quality of service (QoS). However, now the EPON adopts mostly differentiated services model (Diffserv) that only provides quality control on traffic aggregation, whereas, the quality of user session cannot be guaranteed when the network is overloaded with substantial connections. This article proposes to apply integrated services model (lntserv) in Diffserv-based EPON, which uses per-flow processing to guarantee QoS. In the simulation, a framework of combined Diffserv and lntserv model is employed in an EPON system, with a dynamic bandwidth allocation algorithm that adapts to it. The simulation results demonstrate that the EPON system with the combined models can provide more flexible, various control for user-oriented service quality.     

基于固定长度的EPON帧结构和MAC协议设计

以太无源光网络(EPON)已成为国内外接入网技术的最新研究热点,而EPON标准正在制定。针对EPON系统的核心关键技术之一的上行信道带宽动态分配问题,参照APON的G.983建议,提出了一种基于固定长度的EPON上下行传输帧结构和媒质接入控制(MAC)协议。该方案以APON为借鉴,将EPON中以太网帧长度固定下来;考虑到实时业务对时延敏感,MAC协议对实时业务实行优先带宽分配,对其他类型业务则采用动态带宽分配方案。最后通过建模防真分析了协议的信元时延(CD)特性。     

Scalable,hierarchical, Ethernet transport network architecture (HETNA)

Ethernet technology is not inherently scalable, and yet, Ethernet dominates LANs, and recently has diffused to access, aggregation networks, and MANs. Ethernet is even considered for transport networks in the backbone. Many solutions from IEEE, IETF, and MEF are considered for enabling Ethernet beyond LANs and bridged LANs. In this paper we offer HETNA, a hierarchical Ethernet forwarding, which is compatible with legacy networks used by enterprises, carriers, and backbone networks, and provides scalability, mobility, protection, multicasting, and QoS support to intra- and inter-domain networks in an efficient forwarding manner. The suggested architecture can handle streaming, real-time, multicasting, and other applications as well as various addressing mechanisms (e.g., IP or URI addressing). Both connection-oriented transport services and connectionless-oriented services are possible in the suggested architecture. This architecture was simulated and prototyped, showing significant improvements over regular Ethernet in terms of buffers and control messages that enable this network to function.     

EPON承载传统铜缆业务解决方案研究

随着光进铜退的深入展开,EPON网络部署规模持续扩大,用EPON承载传统铜缆业务的需求越来越迫切。本文探讨了传统铜缆业务的现状,研究了用EPON网络承载小灵通、ISDN、DDN等传统铜缆业务的技术原理,并提出实施方案。