Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.

Abstract: A method for allocating time slots of a shared schedule for a plurality of communication lines having a crosstalk relationship is described. A first number of allocated time slots is allocated, according to respective priorities, corresponding to a first time interval for first data to be transmitted. The first data is transmitted. A second number of allocated time slots is allocated, corresponding to a second time interval for second data to be transmitted. The second number is larger than the first number if an allocation increase threshold has been met, based on utilization of a first time slot having a lowest priority of the first number of allocated time slots. The second number is smaller than the first number if an allocation decrease threshold has been met, based on utilization of a second time slot having a higher priority than the first time slot.

Abstract: Methods and apparatus for performing full-duplex communications using a G.hn protocol are provided. A second node of a plurality of nodes is selected, by a first node with which to engage in full-duplex communications. A first seed common to the plurality of nodes is retrieved. A search is performed for a second seed assigned to the second node. A first portion of a frame is generated for transmission using a half-duplex communications mode, wherein transmissions using the half-duplex communications mode are detectable by each of the nodes. A first group of subcarriers is loaded with the first set of phases generated using the first seed and a second group of subcarriers is loaded with the second set of phases generated using the second seed. The first portion is transmitted, in the half-duplex communications mode, from the first node using the first and second groups of subcarriers.

Abstract: Methods and systems are provided for telephone line access with crosstalk stability. A transceiver device coupled to a telephone line, bundled with other telephone lines in a telephone cable, may determine when another transceiver device connected to the telephone cable is estimating signal to noise ratio on another telephone line in the telephone cable, and may control communications over on the telephone line, the controlling including forcing a transmission on the telephone line based on the estimation of signal to noise ratio by the other transceiver device. The transmission may be forced on the telephone line when there is no data to send on the telephone line at a time when the other transceiver device estimates the signal to noise ratio. The forced transmission may be generated by modulating sub-carriers using a pseudo-random sequence generated with an initial seed different from initial seeds used by other transceiver devices.

Abstract: A method of conducting full-duplex transmission between first and second nodes in a communications system having more than two nodes includes the issuing of a start signal on a channel by the first node, wherein the start signal signals that full-duplex transmission is to begin, and identifies the second node as a node with which full-duplex communication is to occur. The method also includes, following the issuing of the start signal, the beginning of full-duplex transmission by the first and second nodes. A node, for use in a network including at least two nodes, is configured to initiate full-duplex communication with any other node by issuing a start signal, where the start signal signals that full-duplex transmission is to begin, and identifies a second node as a node with which full-duplex communication is to occur, and by, following the issuing of the start signal, beginning full-duplex communication.

Abstract: Methods and apparatus for performing full-duplex communications using a G.hn protocol are provided. A second node of a plurality of nodes is selected, by a first node with which to engage in full-duplex communications. A first seed common to the plurality of nodes is retrieved. A search is performed for a second seed assigned to the second node. A first portion of a frame is generated for transmission using a half-duplex communications mode, wherein transmissions using the half-duplex communications mode are detectable by each of the nodes. A first group of subcarriers is loaded with the first set of phases generated using the first seed and a second group of subcarriers is loaded with the second set of phases generated using the second seed. The first portion is transmitted, in the half-duplex communications mode, from the first node using the first and second groups of subcarriers.

Abstract: The present disclosure includes systems and techniques relating to wired communication channels, such as telephone lines in a bundled telephone cable. In some implementations, a system includes telephone lines bundled together, electronic equipment at a first location includes a first transceiver device for each of the telephone lines, where each first transceiver device at the first location is configured to coordinate transmissions over a respective telephone line coupled with the first transceiver device; and second transceiver devices coupled respectively with the telephone lines at second locations, such that each second transceiver device is respectively paired with a first transceiver device at the first location; each pair of the first and second transceiver devices is configured to force transmission on a telephone line connecting the pair when another pair of the first and second transceiver devices estimates a signal to noise ratio on the telephone line connecting the other pair.

Abstract: Aspects of the disclosure provide method and apparatus for managing multicast traffic in a domain, such as a G.hn domain. A method includes storing, at a first node of a domain, a plurality of next nodes for transmitting messages in the domain, forwarding, from the first node to the plurality of next nodes, a probe message transmitted from a second node in response to a request from a third node to join a group to receive a multicast flow that enters the domain from the second node, and storing, at the first node, a list of nodes in association with the multicast flow. The list of nodes is determined at least in part based on a path through which the probe message is transmitted from the second node to the third node.

Abstract: A method including selecting a factor based on a number of bits in a codeword and a natural number and generating a model matrix including first and second matrices having data and parity bits. Hamming weights of the model matrix are not constant and Hamming weights of columns of the model matrix follow a statistical distribution dependent upon a codification rate of a channel. A compact matrix is generated by replacing elements of the model matrix equal to: 1 with a pseudo-random positive whole number; and 0 with ?1. A quasi-cyclic code is generated by replacing in the compact matrix: positive elements with identity matrices; and elements equal to ?1 with null matrices. A number of rows and columns in each of the identity and null matrices is equal to the factor. The quasi-cyclic code is applied to a word to generate a codeword, which is transmitted on the channel.

Abstract: Systems and techniques relating to interference mitigation between power line communication (PLC) and digital subscriber line (xDSL) networks are described. A described technique includes detecting a power line communication node associated with the power line communication network in response to a detection of activity associated with the digital subscriber line network, the power line communication node being configured to transmit signals on the power line communication network in accordance with a power mask; controlling the power line communication node to transmit one or more measurement frames on the power line communication network; determining interference on the digital subscriber line network that is caused by the one or more measurement frames transmitted by the power line communication node; and controlling the power line communication node to adapt the power mask for transmissions on the power line communication network to reduce the interference on the digital subscriber line network.

Abstract: A method including selecting a factor based on a number of bits in a codeword and a natural number and generating a model matrix including first and second matrices having data and parity bits. Hamming weights of the model matrix are not constant and Hamming weights of columns of the model matrix follow a statistical distribution dependent upon a codification rate of a channel. A compact matrix is generated by replacing elements of the model matrix equal to: 1 with a pseudo-random positive whole number; and 0 with ?1. A quasi-cyclic code is generated by replacing in the compact matrix: positive elements with identity matrices; and elements equal to ?1 with null matrices. A number of rows and columns in each of the identity and null matrices is equal to the factor. The quasi-cyclic code is applied to a word to generate a codeword, which is transmitted on the channel.

Abstract: Aspects of the disclosure provide method and apparatus for managing multicast traffic in a domain, such as a G.hn domain. A method includes storing, at a first node of a domain, a plurality of next nodes for transmitting messages in the domain, forwarding, from the first node to the plurality of next nodes, a probe message transmitted from a second node in response to a request from a third node to join a group to receive a multicast flow that enters the domain from the second node, and storing, at the first node, a list of nodes in association with the multicast flow. The list of nodes is determined at least in part based on a path through which the probe message is transmitted from the second node to the third node.

Abstract: A method including generating a matrix. The matrix includes first and second portions. The first portion includes data bits. The second portion includes parity bits and has a triple diagonal structure. The triple diagonal structure includes a first central diagonal, a second central diagonal, and a last row diagonal. Bits of the first central diagonal, the second central diagonal, and the last row diagonal are equal to 1 and a remainder of bits in the triple diagonal structure are equal to 0. The method further includes: determining parity bits based on the matrix; if the matrix is generated to codify data for transmission from a first device to a second device, transmitting the parity bits from the first device to the second device; and if the matrix is generated based on a vector of bits received from the second device, generating a block of data based on the parity bits.

Abstract: The present disclosure includes systems and techniques relating to wired communication channels, such as telephone lines in a bundled telephone cable. In some implementations, a system includes telephone lines bundled together, electronic equipment at a first location includes a first transceiver device for each of the telephone lines, where each first transceiver device at the first location is configured to coordinate transmissions over a respective telephone line coupled with the first transceiver device; and second transceiver devices coupled respectively with the telephone lines at second locations, such that each second transceiver device is respectively paired with a first transceiver device at the first location; each pair of the first and second transceiver devices is configured to force transmission on a telephone line connecting the pair when another pair of the first and second transceiver devices estimates a signal to noise ratio on the telephone line connecting the other pair.

Abstract: A message is received at a communication interface device coupled to a first media type. A second layer (e.g., a dynamic link layer (DLL)) on the communication interface device communicates with an abstraction layer (AL) regarding relaying of the message. The AL determines whether another communication interface device should relay the message via a second media type. When the AL determines that another communication interface device cannot or should not relay the message, the communication interface device relays the message using relaying functionality provided by the second layer (e.g., the DLL). When the AL determines that another communication interface device should relay the message, the AL forwards the message to the other the communication interface device for relaying via the second media type.

Abstract: A method includes detecting, at a first timing with reference to a periodic signal that is common to a first domain and a second domain, a first signal indicative of the first domain. The first signal is used by the first domain to signal presence of the first domain and a time used by the first domain for inter domain communication with other domains. Further, the method includes comparing, the first timing to a second timing with reference to the periodic signal. The second domain uses a second signal at the second timing to signal presence of the second domain and a time used by the second domain for inter domain communication with other domains. Then, the method includes aligning the first signal and the second signal to enable inter domain communication between the first domain and the second domain.

Abstract: A system for transmitting and receiving data includes a physical adaptation block configured to separate the data into a plurality of frequency bands. Each of the frequency bands has an associated symbol time, and each of the associated symbol times is a whole multiple of one half of a smallest symbol time of all of the frequency bands. An analog front end is configured to provide the data in the plurality of frequency bands to a transmission medium.

Abstract: A system including a coupler to couple a signal to a plurality of conductors of an electric network and a transmitter to select a plurality of modes to inject the signal into the plurality of conductors and to transmit the signal via the plurality of conductors. The plurality of modes is selected from a group consisting of a first mode, a second mode, and a third mode. The first mode includes injection of the signal through a selective combination of the plurality of conductors and circulation of current through ground. The second mode includes injection of the signal through a first conductor and return through a second conductor. The third mode includes injection of the signal through one or more first conductors and return through one or more second conductors. The first conductors are different than the second conductors.

Abstract: A first node including a physical layer device, a first transceiver and a second transceiver. The first transceiver includes a first analog front end connected to a first transmission line. The first analog front end is configured to transfer first data between the physical layer device and a second node via the first transmission line. The second transceiver includes a second analog front end connected to a second transmission line. The second analog front end is configured to transfer second data between the physical layer device and a third node via the second transmission line. A first type of the second transmission line is different than a second type of the first transmission line. The first node is configured to perform as a repeater using data repeating functions at a link layer control level.

Abstract: A method including generating a matrix. The matrix includes first and second portions. The first portion includes data bits. The second portion includes parity bits and has a triple diagonal structure. The triple diagonal structure includes a first central diagonal, a second central diagonal, and a last row diagonal. Bits of the first central diagonal, the second central diagonal, and the last row diagonal are equal to 1 and a remainder of bits in the triple diagonal structure are equal to 0. The method further includes: determining parity bits based on the matrix; if the matrix is generated to codify data for transmission from a first device to a second device, transmitting the parity bits from the first device to the second device; and if the matrix is generated based on a vector of bits received from the second device, generating a block of data based on the parity bits.