Performing upstream symbol alignment under FEXT
AssigneeFuturewei Technologies, Inc.
InventorsHaixiang Liang, Yixian Liu
Life of this patent
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Abstract
A method for implementing an upstream symbol alignment within a network component, the method comprising receiving an upstream sync signal via an initializing digital subscriber line (DSL) during a channel discovery phase from a customer premise equipment (CPE), determining a corrected upstream symbol alignment value based upon the upstream sync signal, and transmitting the corrected upstream symbol alignment value to the CPE, wherein the upstream symbol alignment value determines an upstream symbol alignment for one or more upstream transmissions, and wherein the corrected upstream symbol alignment value is determined before receiving a plurality of upstream data signals within the data symbol positions during the channel discovery phase.
Claims14
A method for performing a digital subscriber line (DSL) initialization, comprising:
- receiving, from a first remote DSL transceiver, a first upstream sync symbol associated with an upstream symbol alignment initial value in a first stage of a channel discovery phase for the DSL initialization;
- determining a correction value of the upstream symbol alignment initial value based on the first upstream sync symbol;
- transmitting, to the first remote DSL transceiver, the correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- receiving, from the remote DSL transceiver, a second upstream sync symbol in response to transmission of the correction value of the upstream symbol alignment initial value;
- transmitting in response to reception of the second upstream sync symbol, to the remote DSL transceiver, a synchronization signal to indicate an end of the first stage of the channel discovery phase;
- and
- receiving, from the first remote DSL transceiver, a remote-message 1 (R-MSG 1) in a second stage of the channel discovery phase for the DSL initialization.
An apparatus, comprising:
- a memory and
- a processor coupled to the memory, wherein the memory includes instructions that when executed by the processor cause the apparatus to:
- receive, from a first remote DSL transceiver, a first upstream sync symbol associated with an upstream symbol alignment initial value in a first stage of a channel discovery phase for the DSL initialization;
- determine a correction value of the upstream symbol alignment initial value based on the first upstream sync symbol;
- transmit, to the first remote DSL transceiver, the correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- receive, from the remote DSL transceiver, a second upstream sync symbol in response to transmission of the correction value of the upstream symbol alignment initial value;
- transmit in response to reception of the second upstream sync symbol, to the first remote DSL transceiver, a synchronization signal to indicate an end of the first stage of the channel discovery phase;
- and
- receive, from the first remote DSL transceiver, a remote-message 1 (R-MSG 1) in a second stage of the channel discovery phase for the DSL initialization.
A method for performing a digital subscriber line (DSL) initialization, comprising:
- transmitting, to a DSL transceiver, a first upstream sync symbol using an upstream symbol alignment initial value in a first stage of a channel discovery phase for the DSL initialization;
- receiving in response to transmission of the first upstream sync symbol, from the DSL transceiver, a correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- transmitting, to the DSL transceiver, a second upstream sync symbol using the correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- and
- after receiving from the DSL transceiver a synchronization signal indicating an end of the first stage of the channel discovery phase, transmitting, to the DSL transceiver, a remote-message 1 (R-MSG 1) in a second stage of the channel discovery phase for the DSL initialization.
A digital subscriber line (DSL) transceiver comprising:
- a memory;
- and
- a processor coupled to the memory, wherein the memory includes instructions that when executed by the processor cause the DSL transceiver to:
- transmit, to a second DSL transceiver, a first upstream sync symbol using an upstream symbol alignment initial value in a first stage of a channel discovery phase for a DSL initialization;
- receive in response to transmission of the first upstream sync symbol, from the second DSL transceiver, a correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- transmit, to the second DSL transceiver, a second upstream sync symbol using the correction value of the upstream symbol alignment initial value in the first stage of the channel discovery phase;
- and
- after receiving from the second DSL transceiver a synchronization signal that indicates an end of the first stage of the channel discovery phase, transmit, to the second DSL transceiver, a remote-message 1 (R-MSG 1) in a second stage of the channel discovery phase for the DSL initialization.
Dependencies are inferred from the claim text.