Abstract: A method implemented in a wireless network element (NE), comprising obtaining, via a processor of the wireless NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a wireless communication network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups to produce MIMO pre-coder output signals of the plurality of DS MIMO groups, performing, via the processor, a crosstalk pre-coding across the MIMO groups using a crosstalk pre-coding matrix on the MIMO pre-coder output signals of the plurality of DS MIMO groups to produce a plurality of output signals, with the crosstalk pre-coding matrix computed according to a first DS channel matrix and a DS MIMO channel matrix, wherein the first DS channel matrix comprises first diagonal entries representing first direct channel estimates of the pluralit

Abstract: A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.

Abstract: A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.

Abstract: Time-division duplex (TDD) transmission in a digital subscriber line (DSL) communication system including a group of DSL transceivers at a remote side (FTU-Rs) and a distribution point unit (DPU) by performing, with a second FTU-R among the group of FTU-Rs, an initial upstream symbol alignment for a first FTU-R, where a first gap time the first FTU-R needs to wait before transmitting first upstream symbols to a first DSL transceiver at an operator side (FTU-O) at the DPU in a TDD frame period is acquired to make the first upstream symbols align at the first FTU-O's interface, transmitting second upstream symbols to the first FTU-O to correct the first gap time after performing the initial upstream symbol alignment, receiving, from the first FTU-O, tuning offset information representing a correction for the first gap time, and tuning the first FTU-R's upstream symbols transmit time according to the tuning offset information received.

Abstract: A method implemented in a wireless network element (NE), comprising obtaining, via a processor of the wireless NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a wireless communication network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups to produce MIMO pre-coder output signals of the plurality of DS MIMO groups, performing, via the processor, a crosstalk pre-coding across the MIMO groups using a crosstalk pre-coding matrix on the MIMO pre-coder output signals of the plurality of DS MIMO groups to produce a plurality of output signals, with the crosstalk pre-coding matrix computed according to a first DS channel matrix and a DS MIMO channel matrix, wherein the first DS channel matrix comprises first diagonal entries representing first direct channel estimates of the pluralit

Abstract: A method implemented in a network element (NE), comprising obtaining, via a processor of the NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups, performing, via the processor, crosstalk pre-coding on the plurality of encoded signals jointly after performing the MIMO pre-coding to produce a plurality of output signals, and transmitting, via transmitters of the NE, synchronously the plurality of output signals to a plurality of remote NEs via the plurality of DS channels.

Abstract: A method comprising modulating a plurality of synchronized signals by an orthogonal probe sequence (OPS) to generate a plurality of modulated synchronized signals, wherein the OPS comprises a zero element (0-element) column that indicates a start or an end of the OPS, and concurrently transmitting, using one or more transmitters, the plurality of modulated synchronized signals over a duration of a number of discrete multi-tone (DMT) symbols, wherein each of the plurality of modulated synchronized signals is intended for one of a plurality of receivers that are remotely coupled to the one or more transmitters via a vectored group of subscriber lines, and wherein the 0-element column causes all of the plurality of modulated synchronized signals to have a zero-amplitude during a first or a last of the DMT symbols.

Abstract: A transmitter in a Digital Subscriber Line (DSL) system includes a rate encoder configured to generate a first set of encoded bits using a set of least significant bits, a trellis shaper configured to generate a second set of encoded bits using a most significant bit and the first set of encoded bits, a first constellation mapper configured to generate a first point described by integer coordinates in a complex plane based on the first set of encoded bits obtained from the rate encoder, a second constellation mapper configured to generate a second point described by integer coordinates in the complex plane after interleaving two bits from the second set of encoded bits obtained from the trellis shaper, and a merger module configured to merge the first point with the second point to generate a symbol. The symbol represents a third point described by integer coordinates in the complex plane.

Abstract: A method implemented in a network element (NE), comprising obtaining, via a processor of the NE, a plurality of encoded signals associated with a plurality of downstream (DS) channels in a network, wherein the plurality of DS channels form a plurality of DS multiple-input and multiple-output (MIMO) groups, performing, via the processor, MIMO pre-coding on the plurality of encoded signals according to the plurality of DS MIMO groups, performing, via the processor, crosstalk pre-coding on the plurality of encoded signals jointly after performing the MIMO pre-coding to produce a plurality of output signals, and transmitting, via transmitters of the NE, synchronously the plurality of output signals to a plurality of remote NEs via the plurality of DS channels.

Abstract: An online reconfiguration method comprising communicating data transfer units (DTUs) using a subscriber line, monitoring the subscriber line for a line condition event, detecting the line condition event, wherein detecting the line condition event comprises determining whether the line condition triggers a threshold, sending an online reconfiguration request message that indicates a robust management channel (RMC) frame type in response to detecting the line condition event, wherein the RMC frame type is a normal RMC frame that comprises time marker information when the line condition event does not trigger the threshold, and wherein the RMC frame type is a special RMC frame that comprises time marker information when the line condition event triggers the threshold, receive an online reconfiguration response message that comprises the time marker information, and synchronizing a transition of one or more transmission parameters using the time marker information.

Abstract: A network element including a relay station disposed outside a structure, wherein the relay station is configured to convert a radio frequency signal received from a base station into baseband signals and to frame the baseband signals into data packets, and a transceiver disposed outside the structure and operably coupled to the relay station, wherein the transceiver is configured to receive the data packets from the relay station and to transmit the data packets over copper wire pairs to a second transceiver disposed within the structure and coupled to an indoor radio station so that the indoor radio station is able to convert the data packets back into the radio frequency signal and transmit the radio frequency signal to a user equipment within the structure.

Abstract: Time-division duplex (TDD) transmission in a digital subscriber line (DSL) communication system including a group of DSL transceivers at a remote side (FTU-Rs) and a distribution point unit (DPU) by performing, with a second FTU-R among the group of FTU-Rs, an initial upstream symbol alignment for a first FTU-R, where a first gap time the first FTU-R needs to wait before transmitting first upstream symbols to a first DSL transceiver at an operator side (FTU-O) at the DPU in a TDD frame period is acquired to make the first upstream symbols align at the first FTU-O's interface, transmitting second upstream symbols to the first FTU-O to correct the first gap time after performing the initial upstream symbol alignment, receiving, from the first FTU-O, tuning offset information representing a correction for the first gap time, and tuning the first FTU-R's upstream symbols transmit time according to the tuning offset information received.

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.

Abstract: A method of discontinuous transmission data communication in a digital subscriber line (DSL) transceiver unit, the method comprising determining that a number of a plurality of bits available to transmit is enough to fill a data transfer unit (DTU), forming a DTU, by a DTU framer, comprising the plurality of bits, transferring the DTU to a retransmission queue, and determining the DTUs from the retransmission queue to be transmitted over a next time period used for transmitting over the DSL subscriber line by the DSL transceiver unit.

Abstract: A method implemented in a multicarrier transmission system, the method comprising generating a plurality of constellation points by using one or more constellation mappers to map a plurality of special data sequences for an idle data transmission unit (IDTU), wherein the plurality of special data sequences are computed prior to the mapping such that the plurality of constellation points are essentially inner constellation points, wherein each of the inner constellation points resides in a constellation diagram that corresponds to one of a plurality of subcarriers used by the IDTU, and wherein the constellation diagram comprises a number of inner constellation points and a number of outer constellation points, with the inner constellation points being closer from an origin of the constellation diagram than the outer constellation points, and transmitting the plurality of constellation points.

Abstract: A method implemented in a multicarrier transmission system, the method comprising generating a plurality of constellation points by using one or more constellation mappers to map a plurality of special data sequences for an idle data transmission unit (IDTU), wherein the plurality of special data sequences are computed prior to the mapping such that the plurality of constellation points are essentially inner constellation points, wherein each of the inner constellation points resides in a constellation diagram that corresponds to one of a plurality of subcarriers used by the IDTU, and wherein the constellation diagram comprises a number of inner constellation points and a number of outer constellation points, with the inner constellation points being closer from an origin of the constellation diagram than the outer constellation points, and transmitting the plurality of constellation points.

Abstract: An online reconfiguration method comprising communicating data transfer units (DTUs) using a subscriber line, monitoring the subscriber line for a line condition event, detecting the line condition event, wherein detecting the line condition event comprises determining whether the line condition triggers a threshold, sending an online reconfiguration request message that indicates a robust management channel (RMC) frame type in response to detecting the line condition event, wherein the RMC frame type is a normal RMC frame that comprises time marker information when the line condition event does not trigger the threshold, and wherein the RMC frame type is a special RMC frame that comprises time marker information when the line condition event triggers the threshold, receive an online reconfiguration response message that comprises the time marker information, and synchronizing a transition of one or more transmission parameters using the time marker information.

Abstract: A method of coordinating a plurality of transceiver units (TUs), the method comprising receiving an initialization intent notification from a first TU in the plurality of TUs, sending a low-power link state (LPLS) transition notification to a second TU in the plurality of TUs, receiving a LPLS transition complete notification from the second TU in response to the second TU transitioning from a first mode to a second mode, wherein in the first mode the second TU is in an LPLS with a long inactivity period (LPLS-L), sending an able to initialize notification to the first TU, and performing a vector training procedure using the first TU and the second TU.

Abstract: A method of coordinating a plurality of transceiver units (TUs), the method comprising receiving an initialization intent notification from a first TU in the plurality of TUs, sending a low-power link state (LPLS) transition notification to a second TU in the plurality of TUs, receiving a LPLS transition complete notification from the second TU in response to the second TU transitioning from a first mode to a second mode, wherein in the first mode the second TU is in an LPLS with a long inactivity period (LPLS-L), sending an able to initialize notification to the first TU, and performing a vector training procedure using the first TU and the second TU.

Abstract: A method comprising modulating a plurality of synchronized signals by an orthogonal probe sequence (OPS) to generate a plurality of modulated synchronized signals, wherein the OPS comprises a zero element (0-element) column that indicates a start or an end of the OPS, and concurrently transmitting, using one or more transmitters, the plurality of modulated synchronized signals over a duration of a number of discrete multi-tone (DMT) symbols, wherein each of the plurality of modulated synchronized signals is intended for one of a plurality of receivers that are remotely coupled to the one or more transmitters via a vectored group of subscriber lines, and wherein the 0-element column causes all of the plurality of modulated synchronized signals to have a zero-amplitude during a first or a last of the DMT symbols.