A method and apparatus are applicable to a first node in a power line communication (PLC) system including at least three nodes. The at least three nodes are in a full-duplex working mode. The method includes the first node receives first information from a second node, where the second node is any node in the at least three nodes other than the first node. The first node determines, based on a priority of the second node and/or a priority of the first information, whether to interrupt transmission of second information, where the second information is information currently transmitted by the first node.

Systems and methods for relative phase detection and zero crossing detection for power line communications (PLC) are described. In some embodiments, both transmit and receive PLC devices detect a zero crossing on an AC mains phase. The devices start a phase detection counter (PDC) by generating a zero crossing pulse within 5% of the actual zero crossing time. When a frame is transmitted, the transmitting device includes a PDC value in the frame control header (FCH). The PDC value corresponds to the start time of the FCH. When the frame is received at the receive PLC device, the receive PLC device measures a local PDC value between the zero crossing and the start of the FCH. The receive device compares the local PDC value to the PDC value in the FCH of the received frame and determines if the devices are on the same phase.

A communications device for Multi-Tone Mask (MTM) mode communications at a first router on a powerline communications (PLC) channel in a PLC network including a subnetwork including at least said first router associated with a plurality of nodes, comprising. A memory which stores a broadcast transmission MTM (BT-MTM) communications algorithm. A modem with processor is coupled to the memory. The processor is programmed to implement said BT-MTM communications algorithm, said BT-MTM communications algorithm.

Exemplary embodiments are directed to use of transparent transmission of teleprotection commands in the form of GOOSE or GSSE messages, as defined by the Generic Substation Event class model by the standard IEC 61850, between substations combined with Channel Supervision and Monitoring equivalent to CSM offered by known teleprotection equipment. This approach avoids the disadvantage of non-transparent transmission when using the gateway approach and of the lack of the CSM functionality when using the tunnelling approach.

Aspects of the subject disclosure may include, for example, a network device that accesses internet protocol addresses associated with a group of end point devices where the network device is a closest network device to the group of end point devices, and transmitting data to another network device responsive to a determination that an internet protocol address associated with the data from an end point device is one of the internet protocol addresses associated with the group of end point devices. Other embodiments are disclosed.

Described herein are apparatuses and methods for providing communication in multiple frequencies in a multiband Ethernet over Coax (EoC) system. An exemplary apparatus comprises a transceiver for transmitting or receiving a first data packet on a first channel associated with a first frequency, and a transmitter for transmitting a second data packet on at least one second channel associated with at least one second frequency.

Method, systems, and apparatus include a communication device configured to receive a data unit in accordance with a power line communications protocol, to extract data within the data unit to provide extracted data, and to process the extracted data in accordance with a non-power line communication protocol. Embodiments also describe a communication device configured to format data according to a non-power line communication protocol as part of a data unit conforming to a power line communication protocol, to redundantly encode the data unit across a plurality of subcarriers in accordance with the second communication protocol, and to transmit the data unit in accordance with the second communication protocol to another communications device.

Systems and methods for setting a carrier-sensing mechanism in a PLC node are disclosed. In a PLC standard, coexistence is achieved by having the nodes detect a common preamble and backing off by a Coexistence InterFrame Space (cEIFS) time period to help the node to avoid interfering with the other technologies. In one embodiment, a PHY primitive is sent from the PHY to the MAC know that there has been a preamble detection. A two-level indication may be usedone indication after receiving the preamble and other indication after decoding the entire frame. The MAC sets the carrier-sensing mechanism based on the preamble detection.