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1. 发明授权

US6023467A Operations and maintenance data flows over a point to multipoint broadband access network 失效
标题翻译：操作和维护数据通过点对多点宽带接入网络流动
公开(公告)号：US6023467A
公开(公告)日：2000-02-08
申请号：US848426
申请日：1997-05-08
申请人： Hisham Sami Abdelhamid , Mohamed Mostafa
发明人： Hisham Sami Abdelhamid , Mohamed Mostafa
IPC分类号： H04J3/16 , H04L12/56 , H04Q11/04 , H04H1/02 , H04L12/24 , H04L12/403
CPC分类号： H04Q11/0067 , H04J3/1682 , H04Q11/0478 , H04L2012/5605 , H04L2012/561 , H04L2012/5625 , H04L2012/5672 , H04Q2011/0064
摘要： Functional definitions and data transmission protocols are provided for both downstream and upstream OAM data flows in an ATM-based point-to-multipoint broadband access network ("BAN"), such as a passive optical network ("PON"). In particular, B-ISDN OAM functions are defined from an "OAM flow" perspective, wherein some of the PON physical layer related functions are performed at the F1 level flow, including all functions relating to the sign-on, ranging, power tuning, synchronization and timing status of the ONUs. F3 flow level functions are defined to include further performance and fault management functions, as well as MAC related functions, concerning mainly upstream and for upstream bandwidth management transactions between the headend facility and the respective ONUs. The F1 and F3 OAM data flows are transported in respective downstream frames and upstream packets in preferred protocols suitable for a point-to-multipoint network configuration. In particular, downstream F1 OAM flows are carried in specifically allocated overhead of each downstream frame header, with a downstream F1 "flow unit" defined as the entire frame. Downstream F3 OAM flows may be alternately carried in either the framing overhead, or in overhead associated with specific downstream ATM slots, with a downstream F3 flow unit defined as the respective ATM slots. Upstream F1 and F3 data flows are carried in specifically allocated overhead associated with each upstream packet.
摘要翻译：为基于ATM的点对多点宽带接入网络（“BAN”）（诸如无源光网络（PON））中的下游和上游OAM数据流提供功能定义和数据传输协议。特别地，从“OAM流”的角度定义B-ISDN OAM功能，其中一些PON物理层相关功能在F1级流程中执行，包括与登录，测距，功率调谐相关的所有功能， ONU的同步和定时状态。 F3流水平功能被定义为包括进一步的性能和故障管理功能以及MAC相关功能，主要涉及头端设备和各个ONU之间的上行和上行带宽管理事务。在适合于点对多点网络配置的优选协议中，F1和F3 OAM数据流在相应的下行帧和上行分组中传送。特别地，下游F1 OAM流由每个下游帧报头的专门分配的开销承载，下游F1“流单元”被定义为整个帧。下游F3 OAM流可以在成帧开销或与特定下游ATM时隙相关联的开销中交替携带，下游F3流单元被定义为相应的ATM时隙。上游F1和F3数据流以与每个上游分组相关联的专门分配的开销来承载。

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