Abstract: A system including first and second network nodes that communicate with additional nodes in first and second networks, respectively, using a shared communication channel. In response to detecting presence of the first network node, the second network node transmits a first signal to the first network node including a predetermined sequence known to both the first and second network nodes. The first network node measures a strength of the transmitted signal based on knowledge of the predetermined sequence and calculates a throughput metric (throughput referring to amount of information transmitted per second) based on the measured strength. In response to the throughput metric being less than a unification threshold, the first network node selectively transmits a unification request to the second network node. The unification request invites the second network node to coordinate operation with the first network node to reduce interference between the first network and the second network.

Abstract: A system including first and second network nodes that communicate with additional nodes in first and second networks, respectively, using a shared communication channel. In response to detecting presence of the first network node, the second network node transmits a first signal to the first network node including a predetermined sequence known to both the first and second network nodes. The first network node measures a strength of the transmitted signal based on knowledge of the predetermined sequence and calculates a throughput metric (throughput referring to amount of information transmitted per second) based on the measured strength. In response to the throughput metric being less than a unification threshold, the first network node selectively transmits a unification request to the second network node. The unification request invites the second network node to coordinate operation with the first network node to reduce interference between the first network and the second network.

Abstract: A method for sharing a communication channel between a first network and a second network. The method includes transmitting a signal from the second network to the first network in response to the second network detecting presence of the first network. The signal includes a predetermined sequence measuring the strength of the signal arriving at the first network and transmitting a unification request from the first network to the second network when a metric based on the measured strength is less than a unification threshold. The unification request invites the second network to coordinate operation with the first network to reduce interference between the first network and the second network.

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 system including a first network device, a second network device, and a third network device. The first network device is configured to transmit a first starting signal. The second network device configured to transmit a second starting signal, wherein at least one of the first network device and the second network device is further configured to change a ratio between at least one of respective phases of carriers of the first starting signal and the second starting signal and respective amplitudes of the carriers of the first starting signal and the second starting signal. The third network device is configured to receive the first starting signal and the second starting signal, selectively allow communication with the first network device based on the ratio, and ignore communication from the second network device based on the ratio.

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: Method for increasing the performance of a communications system on a medium formed by multiple conductors which increases the performance of a communications system by means of the creation of numerous communication channels with a high degree of isolation between each other on the same physical medium formed by multiple conductors. The method can be extended to be used in various applications, such as the reuse of frequencies on the same channel, the increase of the capacity of the point-to-point links in a network and the improvement of performance and reliability when used with digital processing of signals for transmission or reception, among others.

Abstract: A system including a first network device, a second network device, and a third network device. The first network device is configured to transmit a first starting signal. The second network device configured to transmit a second starting signal, wherein at least one of the first network device and the second network device is further configured to change a ratio between at least one of respective phases of carriers of the first starting signal and the second starting signal and respective amplitudes of the carriers of the first starting signal and the second starting signal. The third network device is configured to receive the first starting signal and the second starting signal, selectively allow communication with the first network device based on the ratio, and ignore communication from the second network device based on the ratio.

Abstract: A method for simultaneous transmission in time and frequency of multiple communications of data using orthogonal frequency division multiplexing (OFDM) modulation includes transmitting the multiple communications of data at a same time on a single channel. A first starting signal, transmitted using a first network device, and a second starting signal, transmitted using a second network device, are used in transmission of a frame. Properties of the first starting signal and the second starting signal for transmission of each of the multiple communications are modified by shifting a frequency of the first starting signal with respect to a frequency of the second starting signal so that remaining communications coincident in time and frequency with respect to a given communication are ignored. The frequency of the first starting signal is shifted an amount equal to a fraction of a separation between carriers of the OFDM modulation.

Abstract: A method for sharing a communication channel between a first network and a second network. The method includes transmitting a signal from the second network to the first network in response to the second network detecting presence of the first network. The signal includes a predetermined sequence measuring the strength of the signal arriving at the first network and transmitting a unification request from the first network to the second network when a metric based on the measured strength is less than a unification threshold. The unification request invites the second network to coordinate operation with the first network to reduce interference between the first network and the second network.

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: Method for increasing the performance of a communications system on a medium formed by multiple conductors which increases the performance of a communications system by means of the creation of numerous communication channels with a high degree of isolation between each other on the same physical medium formed by multiple conductors. The method can be extended to be used in various applications, such as the reuse of frequencies on the same channel, the increase of the capacity of the point-to-point links in a network and the improvement of performance and reliability when used with digital processing of signals for transmission or reception, among others.

Abstract: Which permits to solve the problems relating to the interference produced among communications equipment of the same technology but belonging to different communications and which simultaneously use the same communications channel in time and frequency. It comprises modifying one of the parameters of the starting signal. The main advantage of the invention is that, in a simple way, it allows equipment to be correctly synchronised with the signals reaching it from its own network while ignoring signals of lesser power received from other networks using the same or different technology, without any need to carry out a complex and costly processing on reception.

Abstract: This permits the transmission of signals over the electricity network in such a way that the spectral density of power is adjusted to the regulations in the current rules by means of the possibility of introducing notches in transmission in an efficient manner. It is characterised by the adjustment of the power in one or more carriers of an OFDM signal for generating these notches, through the use of IDFTs of at least 1024 points (if the IDFT is complex) or at least 2048 points (if the IDFT is real) and through the use of a window to multiply the symbols to be transmitted in time.

Abstract: This process applies to a number of user kits (A, B, . . . X) and a head-end kit (1) communicating over the electricity network (2) using an upstream channel and a downstream channel. In essence, the process comprises accessing by multiple user kits (A, B, . . . X) in the upstream channel and the sending of multiple information frames by the head-end (1) in the downstream channel simultaneously applying OFDMA/TDMA/CDMA multiplexing and dynamically assigning each carrier so as to maximize transmission capacity in both the upstream and downstream channels. In turn, the process allows the adjustment of the quality of service according to the type of information and the user that requires the transmission and the dynamic allocation of bandwidth through constantly calculating the signal-to-noise ratio.

Abstract: Applicable to two-way communication over the electricity network between a plurality of user equipments (2) and a head-end equipment (1); characterized in that the receptors in the equipment (1, 2) continually monitor communication quality by estimating signal to noise ratio (S/N) in the individual carriers in the upstream and downstream channels. The user equipments monitor the state of the network at each moment in time independent of whether or not the transmission is destination for them. Optimum transmission mode is chosen as a result of this monitoring by means of modifying, packet by packet, the number of bits per carrier, the redundancy introduced by a FEC generator (forward error correction/detection), the FEC code, and/or the transmission mode; so as to achieve optimum sharing of the network in time and frequency at all times and to maximize the transmission capacity of the various user equipments by the network.

Abstract: This process applies to a number of user kits (A, B, . . . X) and a head-end kit (1) communicating over the electricity network (2) by means of an upstream channel and a downstream channel.