公开(公告)号：US20040052274A1

公开(公告)日：2004-03-18

申请号：US10316796

申请日：2002-12-11

Applicant: Nortel Networks Limited

Inventor： Guo Qiang Wang ,  Larry Marcanti ,  Herman Kwong

IPC: H04J003/16

CPC classification number: H04J3/1694

Abstract: Time cycles in the physical layer of a passive optical network may be shared by multiple transmitting network devices (ONUs) to enable transmission of time sensitive traffic in a time sensitive manner. By allocating channels within the cyclic frame structure of the physical layer of the network, transmission of data from the ONUs to the OLT may be smoothed to enhance time dependent characteristics of the network. Where the underlying physical layer is a SONET/SDH based network, each SONET/SDH frame is divided into a given number of channels, such as 125 channels each of which is 1 nullS long. Each ONU is allocated one or more channels on each frame in which to transmit data to the OLT. The total bandwidth allocated to a given ONU is determined based on the number of channels allocated to that ONU.

Abstract translation: 无源光网络的物理层中的时间周期可以由多个发射网络设备（ONU）共享，以便以时间敏感的方式传输时间敏感的业务。 通过在网络的物理层的循环帧结构内分配信道，可以平滑从ONU到OLT的数据传输，以增强网络的时间相关特性。 在底层物理层是基于SONET / SDH的网络的情况下，每个SONET / SDH帧被划分为给定数量的信道，例如每个长度为1μs的125个信道。 每个ONU在其中向OLT发送数据的每个帧上分配一个或多个信道。 基于分配给该ONU的信道的数量来确定分配给给定ONU的总带宽。