IMPROVEMENTS IN, OR RELATING TO, VDSL TRANSMISSION SYSTEMS

IMPROVEMENTS IN, OR RELATING TO, VDSL TRANSMISSION SYSTEMS

One problem, frequently encountered with VDSL transmission systems, is that upstream FEXT produced by system users having short wires can be very strong. Users having shorter wires get high bit rates whereas users having longer wires get low bit rates. In extreme cases it may happen that users with...

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Hauptverfasser: WILSON, SARAH, KATE, NILSSON, RICKARD, BENGTSSON, DANIEL, BAHLENBERG, GUNNAR, JOHANSSON, MAGNUS, SJOEBERG, FRANK, NORDSTROEM, TOMAS, ISAKSSON, MIKAEL, OEDLING, PER, OEKVIST, SVEN-GOERAN, OLSSON, LENNART
Format: Patent
Sprache:eng ; fre ; ger
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ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TELEPHONIC COMMUNICATION
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator WILSON, SARAH, KATE
NILSSON, RICKARD
BENGTSSON, DANIEL
BAHLENBERG, GUNNAR
JOHANSSON, MAGNUS
SJOEBERG, FRANK
NORDSTROEM, TOMAS
ISAKSSON, MIKAEL
OEDLING, PER
OEKVIST, SVEN-GOERAN
OLSSON, LENNART
description One problem, frequently encountered with VDSL transmission systems, is that upstream FEXT produced by system users having short wires can be very strong. Users having shorter wires get high bit rates whereas users having longer wires get low bit rates. In extreme cases it may happen that users with wire lengths greater than 1000 meter cannot transmit data upstream. The present invention provides a VDST transmission system with a plurality of modems. The modems are located at varying distances from a central station. There is a target bit rate for each modem. That modems on shorter wires have control means for reducing their transmit power. This reduces the FEXT produced by these modems enabling modems on longer wires to transmit at higher bit rates.
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Users having shorter wires get high bit rates whereas users having longer wires get low bit rates. In extreme cases it may happen that users with wire lengths greater than 1000 meter cannot transmit data upstream. The present invention provides a VDST transmission system with a plurality of modems. The modems are located at varying distances from a central station. There is a target bit rate for each modem. That modems on shorter wires have control means for reducing their transmit power. 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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
MULTIPLEX COMMUNICATION
TELEPHONIC COMMUNICATION
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title IMPROVEMENTS IN, OR RELATING TO, VDSL TRANSMISSION SYSTEMS
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