公开(公告)号：US20030193945A1

公开(公告)日：2003-10-16

申请号：US10430796

申请日：2003-05-06

申请人： 3COM CORPORATION

发明人： Amit Lewin ,  Ilan Glaser ,  Yackov Sfadya ,  Yuri Poddobny

IPC分类号： H04L012/56

CPC分类号： H04L12/289 ,  H04L12/2856 ,  H04L12/40136 ,  H04L12/413 ,  H04L12/4633

摘要： An apparatus for and method of encapsulating Ethernet frame data in HDLC frames for transmission over a VDSL transport facility. The HDLC frames are transmitted over a point to point VDSL link where they are subsequently extracted and forwarded as standard Ethernet frames. The VDSL facility transport system comprises one or more Ethernet to VDSL CPEs coupled to a DSLAM over a VDSL transport facility. The Ethernet to VDSL CPE functions to receive a 10BaseT Ethernet signal and encapsulate the Ethernet frame into a HDLC frame for transmission over the VDSL facility. In one embodiment, a single chip microcontroller on the CPE performs both Ethernet controller and HDLC controller functions. The DSLAM is adapted to receive HDLC frames from one or more CPEs, extract Ethernet frames therefrom and generate and output a standard Ethernet signal. Ethernet frames are encapsulated within HDLC frames and transmitted on the wire pair without regard to the state of the SOC signals. This overcomes the problems associated with synchronizing the transmission of the Ethernet data with the SOC signals.

公开(公告)号：US20040052268A1

公开(公告)日：2004-03-18

申请号：US10654619

申请日：2003-09-03

申请人： 3Com Corporation

发明人： Amit Lewin ,  Eytan Mann ,  Yackov Sfadya ,  Yuri Poddobny

IPC分类号： H04J003/22

CPC分类号： H04M3/007 ,  H04L12/2856 ,  H04L12/2881 ,  H04L12/4633 ,  H04L49/351 ,  H04L2212/00 ,  H04M11/062

摘要： An apparatus for and method of encapsulating Ethernet frames over a Very high speed Digital Subscriber Line (VDSL) transport facility. The VDSL frames are transmitted over a point to point VDSL link where they are subsequently extracted and forwarded as standard Ethernet frames. The VDSL facility transport system comprises an Ethernet to VDSL Customer Premises Equipment (CPE) coupled to a DSL Access Multiplexor (DSLAM) over a VDSL transport facility. The Ethernet to VDSL CPE functions to receive a 10BaseT Ethernet signal and encapsulate the Ethernet frame into a VDSL frame for transmission over the VDSL facility. The DSLAM is adapted to receive VDSL frames, extract Ethernet frames therefrom and generate and output a standard Ethernet signal. Ethernet frames are encapsulated within VDSL frames and transmitted on the wire pair without regard to the state of the SOC signals.

摘要翻译： 一种用于在超高速数字用户线（VDSL）传输设施上封装以太网帧的装置和方法。 VDSL帧通过点到点VDSL链路传输，随后它们被提取并作为标准以太网帧转发。 VDSL设施传输系统包括通过VDSL传输设施耦合到DSL接入多路复用器（DSLAM）的以太网到VDSL客户端设备（CPE）。 以太网到VDSL CPE功能用于接收10BaseT以太网信号，并将以太网帧封装到VDSL帧中，以通过VDSL设备传输。 DSLAM适于接收VDSL帧，从其中提取以太网帧，并生成并输出标准以太网信号。 以太网帧封装在VDSL帧内，并在线对上发送，而不考虑SOC信号的状态。

公开(公告)号：US20030223446A1

公开(公告)日：2003-12-04

申请号：US10430480

申请日：2003-05-06

申请人： 3COM CORPORATION

发明人： Amit Lewin ,  Opher Yaron ,  Alon Hurwitz ,  Yuri Poddobny

IPC分类号： H04L012/56

CPC分类号： H04L12/2881 ,  H04L12/2856 ,  H04L12/40136 ,  H04L12/413 ,  H04L12/4633 ,  H04L27/2662

摘要： An apparatus for and method of encapsulating Ethernet frame data in Very high speed Digital Subscriber Line (VDSL) frames. The VDSL frames are transmitted over a point to point VDSL link where they are subsequently extracted and forwarded as standard Ethernet frames. The VDSL facility transport system comprises an Ethernet to VDSL Consumer Premises Equipment (CPE) coupled to a DSL Access Multiplexor (DSLAM) over a VDSL transport facility. The Ethernet to VDSL CPE functions to receive a 10BaseT Ethernet signal and encapsulate the Ethernet frame into a VDSL frame for transmission over the VDSL facility. The DSLAM is adapted to receive VDSL frames, extract Ethernet frames therefrom and generate and output a standard Ethernet signal. Ethernet frames are encapsulated within VDSL frames and transmitted on the wire pair without regard to the state of the SOC signals. This overcomes the problems associated with syncing the transmission of the Ethernet data with the SOC signals. The present invention also provides a method of providing the receiving station an indication of the start of a VDSL frame. A preamble having certain desirable characteristics such as good autocorrelation properties, is used by the receiving station to identify the start of a VDSL frame. To further ensure that a detected start of frame is valid, the length field of the VDSL frame is examined for a legal length value.

摘要翻译： 一种在超高速数字用户线（VDSL）帧中封装以太网帧数据的装置和方法。 VDSL帧通过点到点VDSL链路传输，随后它们被提取并作为标准以太网帧转发。 VDSL设施传输系统包括通过VDSL传输设施耦合到DSL接入多路复用器（DSLAM）的以太网到VDSL消费者住宅设备（CPE）。 以太网到VDSL CPE功能用于接收10BaseT以太网信号，并将以太网帧封装到VDSL帧中，以通过VDSL设备传输。 DSLAM适于接收VDSL帧，从其中提取以太网帧，并生成并输出标准以太网信号。 以太网帧封装在VDSL帧内，并在线对上发送，而不考虑SOC信号的状态。 这克服了同步以太网数据与SOC信号的传输相关的问题。 本发明还提供了一种向接收站提供VDSL帧的开始的指示的方法。 接收站使用具有某些所需特性（诸如良好的自相关特性）的前同步码来识别VDSL帧的开始。 为了进一步确保检测到的起始帧有效，检查VDSL帧的长度字段的合法长度值。