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    IMPROVEMENTS IN, OR RELATING TO, MULTI-CARRIER TRANSMISSION SYSTEMS
    2.
    发明授权
    IMPROVEMENTS IN, OR RELATING TO, MULTI-CARRIER TRANSMISSION SYSTEMS 失效
    在多载波传输系统中的改进或与之相关的改进

    公开(公告)号：EP0922341B1

    公开(公告)日：2002-11-13

    申请号：EP97937939.3

    申请日：1997-09-01

    Applicant: STMicroelectronics N.V.

    Inventor： ISAKSSON, Mikael ,  JOHANSSON, Magnus ,  TONVALL, Harry ,  OLSSON, Lennart ,  STEFANSSON, Tomas ,  ÖHMAN, Hans ,  BAHLENBERG, Gunnar ,  ISAKSSON, Anders ,  ÖKVIST, Göran ,  LJUNGGREN, Lis-Marie ,  NORDSTRÖM, Tomas ,  ISAKSSON, Lars-Ake ,  BENGTSSON, Daniel ,  HAKANSSON, Siwert ,  WEN, Ye

    IPC: H04L5/06 ,  H04L27/26

    CPC classification number: H04L5/006 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0046

    Abstract: The invention relates to a multi-carrier transmission system, particularly a DMT system, in which data is transmitted between two transceivers using a plurality of carriers, the frequency bandwidth of the system being divided between said plurality of carriers, the transmission system being adapted for operation in a heterogeneous network including a number of subscriber equipments having different channel characteristics and coexisting on the same cable, the length of cable for each subscriber terminal varying in dependence on their respective locations. In accordance with the invention the transmission system includes allocation means for allocating the traffic of subscriber equipments having a shorter length of cable to tones starting from a higher frequency band of said system bandwidth.

    Abstract translation: 本发明涉及一种多载波传输系统，特别是一种DMT系统，其中使用多个载波在两个收发信机之间传输数据，该系统的频带宽度在所述多个载波之间分配，传输系统适用于 在包括具有不同信道特性并且共存于相同电缆上的多个用户设备的异构网络中进行操作，每个用户终端的电缆长度根据它们各自的位置而变化。 根据本发明，传输系统包括分配装置，用于将具有较短电缆长度的用户设备的业务分配到从所述系统带宽的较高频带开始的音调。

    IMPROVEMENTS IN, OR RELATING TO, VDSL
    6.
    发明公开
    IMPROVEMENTS IN, OR RELATING TO, VDSL 有权
    改进技术VDSL

    公开(公告)号：EP1062760A1

    公开(公告)日：2000-12-27

    申请号：EP99907994.0

    申请日：1999-02-17

    Applicant: STMicroelectronics N.V.

    Inventor： ISAKSSON, Mikael ,  BENGTSSON, Daniel ,  SJÖBERG, Frank ,  ÖDLING, Per ,  NILSSON, Rickard ,  BAHLENBERG, Gunnar ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  ÖKVIST, Göran

    IPC: H04L5/06 ,  H04L27/26

    CPC classification number: H04L5/143 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2647

    Abstract: Zipper is a time-synchronized frequency-division duplex implementation of discrete multi tone (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. The Zipper scheme implies that every carrier, in the total set of carriers in the DMT signal, is exclusively chosen to be used for either the up-stream or the down-stream direction. When all transmitters are time synchronized, the near end cross-talk (NEXT) and near end echoes injected into the received signal are orthogonal to the desired signal. The present invention provides s telecommunications transmission system using zipper and having at least two VDSL systems. Each VDSL system comprises a pair of zipper modems communicating over a cable transmission path. The two VDSL systems employ a common cable. The telecommunications transmission system is adapted to: handle zipper transmissions transmitted over the common cable; at least partly mitigate NEXT; and permit transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.

    IMPROVEMENTS IN VDSL
    7.
    发明授权
    IMPROVEMENTS IN VDSL 有权
    改进技术VDSL

    公开(公告)号：EP1062760B1

    公开(公告)日：2004-11-24

    申请号：EP99907994.0

    申请日：1999-02-17

    Applicant: STMicroelectronics N.V.

    Inventor： ISAKSSON, Mikael ,  BENGTSSON, Daniel ,  SJÖBERG, Frank ,  ÖDLING, Per c/o Bo Ödling ,  NILSSON, Rickard ,  BAHLENBERG, Gunnar ,  JOHANSSON, Magnus ,  OLSSON, Lennart ,  ÖKVIST, Göran

    IPC: H04L5/06 ,  H04L27/26

    CPC classification number: H04L5/143 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/2647

    Abstract: Zipper is a time-synchronized frequency-division duplex implementation of discrete multi tone (DMT) modulation. Two communicating Zipper modems transmit DMT symbols simultaneously with a common clock. The Zipper scheme implies that every carrier, in the total set of carriers in the DMT signal, is exclusively chosen to be used for either the up-stream or the down-stream direction. When all transmitters are time synchronized, the near end cross-talk (NEXT) and near end echoes injected into the received signal are orthogonal to the desired signal. The present invention provides s telecommunications transmission system using zipper and having at least two VDSL systems. Each VDSL system comprises a pair of zipper modems communicating over a cable transmission path. The two VDSL systems employ a common cable. The telecommunications transmission system is adapted to: handle zipper transmissions transmitted over the common cable; at least partly mitigate NEXT; and permit transmissions in a first VDSL system which are asynchronous with transmissions in a second VDSL system.

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