Stmicroelectronics N.v.

Telia Ab

Netsocket, Inc.

Operax Ab

Joachim Johansson

Mikael Isaksson

Daniel Bengtsson

Lennart Olsson

Magnus Johansson

Gunnar Bahlenberg

Anders Isaksson

Tomas Stefansson

Sven-Rune Olofsson

Goran Okvist

Hans Ohman

Lis-Marie Ljunggren

Joakim Norrgard

Emil Svanberg

Lis-Mari Ljunggren

Jim Sundqvist

Siwert Hakansson

Hans Lundberg

Sarah Kate Wilson

Anders Larsson

Ulf Bodin

Olov Schelen

Per Odling

Richard Nilsson

Sivert H&aring;kansson

G&ouml;ran &Ouml;kvist

Hans &Ouml;hman

Niklas Grip

Per Ola Borjesson

Fredrik Pettersson

Niklas Borg

Anders Bergsten

Hans Lungberg

Anders Torger

Olof Schelen

Joakim Norrgård

A data network, method and a computer program product, wherein the data network is implemented by a first network level () having a first addressing scheme and at least a second network level () having a second addressing scheme. Each network level provides connectivity over at least one network domain. A first group of Network Resource Managers, NRMs, (b-d)) is arranged to control the resources of the first network level and a second group of NRMs (e-g) is arranged to control the resources of the second network level. The NRMs of the first group (b-d) and second group (e-g) exchange resource requests by using the first addressing scheme and the NRMs (e-g) of the second group perform an address mapping between the first and second addressing schemes.

Arrangements and method for hierarchical resource management in a layered network architecture

When delivering a broadband service, such as xDSL, without inband POTS, it is necessary to separate the analogue POTS signal and the xDSL signal from each other at both the CO (Central Office) and the CP (Customer's Premises). This can be achieved by using an active POTS splitter. The present invention incorporates test functionality for the line between the CP and the CO, or ONU (Optical Network Unit), in the POTS splitter. This enables two-sided measurements on the line, both during installation and during operation. The measurements are performed at the CO and upon request, or when the test device automatically sends a test message/signal. In this way there is no need for field technicians at the CP side. The POTS splitter can have a unique identity code that is transmitted to the CO each time a test is started, or on receipt of a request from the CO.

Telecommunications

Method in a packet based communication network including network domains to establish a virtual leased line (VLL) between a source (SRC) and a destination (DST) in different domains in order to achieve packet transfer between the source and the destination, wherein a bandwidth broker (BB) is associated to each network domain.

Network optimisation method

A VDSL-modem which is divided into an analog part which is placed in an optical node and a digital part which is placed in a local station. The analog part of the VDSL-modem includes an A/D-converter and D/A-converter, a filter, an amplifier, a hybrid/balun, an adaptive noise attenuator, an optical interface, and possibly an echo canceller. The digital part of the modem includes an FFT/IFFT-processor, a synchronizer, an equalizer, an interleaving unit, an error correction unit, a protocol manager, and an optical interface. The VDSL-modem simplifies synchronization of the modem and reduces power consumption in the optical node. A multiplexor function in the optical node in addition is simpler because it need not manage a protocol.

VDSL modem divided into a digital and an analog part

A procedure for control of data file transmission between transmitting and receiving units, at which examples of the data file to be transmitted/transferred are stored at a plurality of the transmitting units, and a device to effect this procedure. The control of the data file transmission is performed according to the following procedure. Transmission of segments of the wanted data file from a plurality of transmitting units is requested, and these segments are received from the transmitting units. When the transmission of a segment of the data file from a first server is finished, transmission of one more segment of the data file is requested, for which transmission from another server has started but not been finished, from the first server. This is after that repeated until all segments have been transmitted, at which transmissions in progress are stopped and the segments are put together to the wanted file.

Procedure and device for control of data file transmission

A RFI canceller, for use in a subscriber line system using multi-carrier modulation, measures a RFI disturbance in carriers falling within a band of frequencies causing the RFI. The RFI ingress into carriers outside the band of frequencies is estimated, and an error correcting signal derived from the estimation of the RFI ingress is subtracted from a received signal. The subscriber line system may be a VDSL system and the multi-carrier modulation may be DMT. The RFI canceller includes a demodulator for demodulating an incoming data stream to provide a first parallel data stream. A parallel to serial convertor converts the first parallel data stream to a first serial data stream. A digital to analogue convertor converts the first serial data stream to a first analogue signal. An analogue RFI canceller circuit combines the analogue signal with an analogue error correcting signal, to produce a second analogue signal. An analogue to digital convertor converts the second analogue signal to a second serial data signal. A serial to parallel convertor converts the second serial data stream to a second parallel data stream. A modulator modulates the second parallel data stream onto a multiplicity of carriers.

Subscriber line transmission systems

An arrangement for synchronization of nodes in VDSL-systems, or more exactly, synchronization of optical VDSL-nodes which share a common part of a cable in the access network between subscribers and a local station. A time synchronization is provided towards an external system, for instance GPS, which gives a time reference by which the different nodes can be synchronized. The synchronization reduces the near end cross-talk between the VDSL-systems in the different nodes. Preferably, each respective node includes a receiver for a synchronization signal and an internal oscillator with high stability to deliver a stable clock signal.

Arrangement for synchronization of nodes in VDSL-systems

Growing community of inventors

Lulea, Sweden

Joachim Johansson