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1. 发明申请

US20070147837A1 Method of increasing number of subscribers using time division duplexing technology in wavelength division multiplexing/Ethernet passive optical network system 审中-公开
标题翻译：波分复用/以太网无源光网络系统中使用时分双工技术的用户数量增加的方法
公开(公告)号：US20070147837A1
公开(公告)日：2007-06-28
申请号：US11634507
申请日：2006-12-06
申请人： Jeong Yoo , Byoung Kim , Bokrae Jung , Jaegwan Kim , Namuk Kim , Minho Kang
发明人： Jeong Yoo , Byoung Kim , Bokrae Jung , Jaegwan Kim , Namuk Kim , Minho Kang
IPC分类号： H04J14/00
CPC分类号： H04J14/0226 , H04J3/1694 , H04J14/0227 , H04J14/0246 , H04J14/0247 , H04J14/025 , H04J14/0252 , H04J14/0282 , H04J2014/0253
摘要： Provided is a method of increasing the number of subscribers using a time division duplexing (TDD) technology in a wavelength division multiplexing (WDM)/Ethernet passive optical network (WE-PON) system, and more particularly, a method of increasing the number of subscribers admissible per wavelength using a TDD technology. In an existing WE-PON, due to an amplitude squeezing effect (ASE) in an optical network terminal (ONT) and an optical output power restriction in an optical line terminal (OLT), there is a disadvantage in that 4 or more subscribers cannot be simultaneously accommodated per wavelength. However, the present invention enables accommodation of a maximum of 16 subscribers per wavelength by applying a TDD technology to a medium access control (MAC) protocol. Point-to-multipoint services can be provided without the need of an additional header for classifying upstream and downstream window sizes in a downstream bandwidth used in an existing WDM-PON loopback technique using dynamic band allocation (DBA) applied to a conventional E-PON MAC protocol and scheduling algorithm. In addition, a DBA and threshold adjustment mechanism are provided to compensate for a downstream bandwidth decrease caused by application of the TDD technology.
摘要翻译：提供了一种在波分多路复用（WDM）/以太网无源光网络（WE-PON）系统中增加使用时分复用（TDD）技术的用户数量的方法，更具体地说，用户可以使用TDD技术在每个波长上接受许可。在现有的WE-PON中，由于光网络终端（ONT）中的振幅挤压效应（ASE）和光线路终端（OLT）中的光输出功率限制，存在4个以上用户不能每个波长同时容纳。然而，本发明能够通过将TDD技术应用于媒体接入控制（MAC）协议来容纳每个波长最多16个用户。可以提供点到多点服务，而不需要用于在现有的WDM-PON环回技术中使用的动态频带分配（DBA）中使用的下行带宽中的上行和下行窗口大小进行分类的附加报头，所述动态频带分配（DBA）应用于常规E-PON MAC协议和调度算法。另外，提供DBA和阈值调整机制来补偿由TDD技术的应用引起的下行带宽减少。

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