Method and apparatus for transmitting signals over wire connections

Patent metadata

Field	Value
Publication number	US-10998933-B2
Application number	US-201816497599-A
Country	US
Kind code	B2
Filing date	Apr 3, 2018
Priority date	Mar 31, 2017
Publication date	May 4, 2021
Grant date	May 4, 2021

Abstract

A method and apparatus for transmitting data from a transmitter device to one or more receiver devices connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections and a further wire connection at different tones, the method comprising: for each tone, allocating signals transmitted on the further wire connection as supporting signals for a particular wire connection, and measuring electromagnetic coupling between the further wire connection and that particular wire connection; using the measurements, determining a power allocation for transmitting a supporting signal on the further wire connection; for one or more of the tones: transmitting a signal onto the particular wire connection, and transmitting a supporting signal onto the further wire connection at the determined transmission power, thereby to cause crosstalk interference in the particular wire connection.

First claim

The invention claimed is:

1. A method of transmitting data from a transmitter device to one or more receiver devices, each of the one or more receiver devices being connected to the transmitter device via a respective wire connection, the transmitter device being operable to transmit signals onto the wire connections at one or more different tones, the transmitter device further being operable to transmit signals onto a further wire connection at the one or more different tones, the method comprising:
for each of the one or more tones, allocating signals transmitted on the further wire connection at that tone as supporting signals for a particular wire connection;
for each of the one or more tones, measuring an electromagnetic coupling between the further wire connection and the particular wire connection to which signals transmitted on the further wire connection at that tone have been allocated as supporting signals;
for each of the one or more tones, using the electromagnetic coupling measurements, determining a power allocation for transmitting a supporting signal on the further wire connection at that tone; and,
for one or more of the tones:
transmitting a signal onto the particular wire connection that has been allocated a supporting signal at that tone; and
transmitting a supporting signal onto the further wire connection at that tone, thereby to cause crosstalk interference in the particular wire connection transmitting the first signal, wherein a transmission power of the supporting signal is based on the power allocation determined for that supporting signal on the further wire connection at that tone.

2. A method according to claim 1 , wherein transmitting a signal onto a wire connection comprises:
determining a power for transmitting the signal on that wire connection comprising optimising a power for transmitting the signal on that wire connection based on power contributions from the supporting signals; and
transmitting the signal on that wire connection at the determined power.

3. A method according to claim 1 , wherein measuring the electromagnetic coupling between the further wire connection and that wire connection comprises measuring a value of a channel transfer function between the further wire connection and that wire connection.

4. A method according to claim 1 , wherein the further wire connection is not connected between the transmitter device and the one or more receiver devices.

5. A method according to claim 1 , wherein determining the power allocation comprises determining, for each of the one or more tones indexed by m, and for the further wire connection indexed by j, a value of:

s

i
^

,
j

m

=

ρ

i
^

,
j

m

[

(

1
-

β

max

i
^

,
j

m

-

β

min

i
^

,
j

m

)

(

Ω

i
^

,
j

+

η

i
^

,
j

m

)

⁢

⁢
ln
⁢

⁢
2

-

1

γ

i
^

,
j

m

]

where: m is an index for the different tones;
j is an index for the further wire connection;
î denotes the wire connection that has been allocated signals transmitted on the further wire connection at tone m as supporting signals;
s î,j m is a power allocation for transmitting a supporting signal for the î wire connection on the further wire connection j at tone m;
ρ î,j m , Ω î,j , η î,j m ,

β

max

i
^

,
j

m

,

and
⁢

Assignees

• British Telecomm

Inventors

• Al Rawi Anas
• Humphrey Leslie
• Linney Trevor

Classifications

• H04M11/062 Primary

  using different frequency bands for speech and other data · CPC title

• H04B3/38

  for signals in two different frequency ranges transmitted in opposite directions over the same transmission path · CPC title

• H04B3/487

  Testing crosstalk effects · CPC title

• H04L5/20

  using different combinations of lines, e.g. phantom working · CPC title

• H04B3/32 Primary

  Reducing cross-talk, e.g. by compensating · CPC title