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1. (WO2018087104) METHOD AND APPARATUS FOR OPERATING A DIGITAL SUBSCRIBER LINE ARRANGEMENT

Pub. No.:    WO/2018/087104    International Application No.:    PCT/EP2017/078509
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Wed Nov 08 00:59:59 CET 2017
IPC: H04M 11/06
H04B 3/54
H04B 3/32
Applicants: BRITISH TELECOMMUNICATIONS PUBLIC LIMITED COMPANY
Inventors: HORSLEY, Ian
LINNEY, Trevor
HUMPHREY, Leslie
AL RAWI, Anas
Title: METHOD AND APPARATUS FOR OPERATING A DIGITAL SUBSCRIBER LINE ARRANGEMENT
Abstract:
An aggregation device (10) is arranged to receive a plurality of lines (21, 22) each of which is connected to a user premises (11, 12) and wherein one of the user premises is a multi-terminating-point enabled premises and comprises a splitter device connected to the line and at least two distinct terminating points each of which is connected to the splitter device via an in-premises connection and is operable to terminate a two part connection between the respective terminating point and the aggregation device via the splitter device, and wherein the aggregation device comprises: a transmitter portion operable to transmit signals to a pre-coding unit (e.g. a vectoring unit) for precoding the signals (on a tone-by-tone basis) to be transmitted over the lines so as to minimise the interference from one signal to another by means of a pre-coding matrix; a memory storing a plurality of pre-coding matrices, or sets of components thereof, (on a tone-by-tone basis) each of which is adapted for use when transmitting signals to a respective terminating point within the (or each) multi-terminating-point enabled premises; a determination means for determining to which terminating point within the (or each) multi-terminating-point enabled premises a signal for transmission is destined; and a selection means for selecting a respective pre-coding matrix, or a set of components thereof, adapted for use when transmitting signals to the determined terminating point for use by the transmitter portion, whereby signals transmitted to a respective termination point are pre-coded using a pre-coding matrix which is adapted for use when transmitting signals to that termination point, and wherein the pre-coding matrices for use when transmitting signals to one termination point are different from the corresponding pre-coding matrices for use when transmitting signals to another termination point.