Method and apparatus for transmitting and receiving signals over pairs of wires
AssigneeBritish Telecommunications public limited company
InventorsAnas Al Rawi, Leslie Humphrey, Trevor Linney, Ian Horsley
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Abstract
A method of transmitting data from a transmitter device to a plurality of receiver devices each of which is connected to the transmitter device via a respective wire connection the method comprising transmitting a common signal onto all or both of the respective wire connections and using a multiple access technique to enable respective virtual data channels to be generated for transmitting data from the transmitter device to each of the receiver devices via its own respective virtual data channel.
Claims9
A method of transmitting data from a transmitter device to a plurality of receiver devices, each of which is connected to the transmitter device via a respective wire connection, the method comprising:
- transmitting a common signal onto all or both of the respective wire connections;
- and
- using a multiple access technique to enable respective virtual data channels to be generated for transmitting data from the transmitter device to each of the receiver devices via its own respective virtual data channel,
- wherein the common signal transmitted onto all or both of the respective wire connections is employed in a predetermined upper portion of an available frequency spectrum available for use in communicating over metallic pair connections, and in a lower portion of the available frequency spectrum vectored discrete multitone transmission is used.
A transmitter for transmitting data, to at least a first and a second receiver device via respective first and second wire connections which directly connect each respective receiver device to the transmitter device, using a discrete multi-tone communication method employed at frequencies at which there is significant indirect coupling between the wire connections, the transmitter device comprising:
- a data combiner for combining a first set of data to be transmitted to the first receiver and a second set of data to be transmitted to the second receiver into a single common discrete multi-tone signal;
- and
- a line driver for driving both the first and second wire connections with the common signal,
- wherein the transmitter is operable to transmit the common discrete multi-tone signal onto all or both of the respective wire connections in a predetermined upper portion of an available frequency spectrum available for use in communicating over metallic pair connections, and is further operable to transmit different respective vectored signals over each respective wire connection in a lower portion of the available frequency spectrum.
Dependencies are inferred from the claim text.