Back to results
US 2013/0294597 A1Published application
Aligning the Upstream DMT Symbols of Multiple Lines in a TDD DSL System
AssigneeFuturewei Technologies, Inc.
InventorsCao Shi, Amir H. Fazlollahi, Jianhua Liu
Life of this patent
Estimating the term…
Abstract
A method comprising transmitting a delay value to each of a plurality of digital subscriber line (DSL) transceivers, by a distribution point unit (DPU), and receiving a plurality of signals at substantially the same time, wherein each of the plurality of signals is from a different DSL transceiver in the plurality of DSL transceivers and transmitted at different times based on the delay value and a corresponding propagation delay.
Claims21
A method comprising:
- transmitting a delay value to each of a plurality of digital subscriber line (DSL) transceivers, by a distribution point unit (DPU);
- and
- receiving a plurality of signals at substantially the same time, wherein each of the plurality of signals is from a different DSL transceiver in the plurality of DSL transceivers and transmitted at different times based on the delay value and a corresponding propagation delay.
A method comprising:
- synchronizing transmitters of a plurality of digital subscriber line (DSL) remote terminals, by a distribution point unit (DPU) comprising a plurality of collocated transceivers, such that the signals received at a U-interface of the collocated transceivers arrive at substantially the same time,
- wherein the synchronization is based on an assumed longest DSL line that may be connected to the DPU.
A distribution point unit (DPU) comprising:
- a plurality of digital subscriber line (DSL) transceivers;
- and
- a processor coupled to the DSL transceivers and configured to:
- synchronize transmitters of a plurality of DSL remote terminals such that the signals received at a U-interface of the plurality of DSL transceivers arrive at substantially the same time, wherein the synchronization is based on an assumed longest DSL line that may be connected to the DPU.
1 more element
A method comprising:
- acquiring a delay value, by a first digital subscriber line (DSL) transceiver, from a second DSL transceiver at a distribution point unit (DPU);
- and
- transmitting a signal, by the first DSL transceiver, at a time based on the delay value and an estimated propagation delay between the first DSL transceiver and the second DSL transceiver.
Dependencies are inferred from the claim text.