64 results about "Broadband power line communications" patented technology

A system for providing communications with a plurality of power distribution equipment via a broadband over power line communication system that provides broadband internet access to a plurality of consumers is provided. In one embodiment, the system may include a computer system having executable program code executable to generate control messages for controlling the plurality of power distribution automation equipment and a plurality of interface devices, wherein each interface device is communicatively coupled to one or more of the plurality of power distribution equipment. The computer system may be configured to transmit control messages to the plurality of power distribution equipment via a communication path that includes the broadband over power line communication system and the plurality of interface devices.

A broadband powerline communication system is disclosed which makes use of knowledge of the spectrum characteristics of a local radio environment in order to improve the performance of the system. A determination is made of the spectrum characteristics of a radio environment in the vicinity of the broadband powerline communication system that is transmitting data on modulated carrier frequencies. Certain ones of the carrier frequencies otherwise used by the broadband powerline communication system may be masked (i.e., not used) by all or part of the broadband powerline system in order to avoid interference based on the determination. In various embodiments, the spectrum characteristics are determined 1) in advance and used to compile a configuration database comprising frequency masking parameters; 2) by monitoring the local radio environment using the transmitter/receiver nodes of the system; or 3) based upon receipt of an indication from a conflicting user that the user is experiencing interference. Various combinations of these spectrum characteristic determination techniques may also be used.

A transmit and receive circuit for use in power line communication devices is provided. One embodiment of the circuit includes a receive channel with a first delay circuit coupled to a first switch having an open configuration and a closed configuration a first switch. The circuit also may include a transmit channel coupled to the receive channel at a node and including a second delay circuit coupled to a second switch having an open configuration and a closed configuration. When the switch of either channel is closed, the switch of the other channel is open. Data signals traversing either channel when that channel's switch is closed, are phase shifted approximately three hundred and sixty degrees and conducted back to the node.

One embodiment of the present invention may include of plurality of wireless hops that provide a multi-hop wireless link for facilitating the communication of voice, video, audio, and other data in a packet based network between a broadband power line communications network and a conventional telecommunications link (such as a fiber optic link), which may be connected to another network such as the Internet via a point-of-presence.

An LED light and communication system is in communication with a broadband over power line communications system. The LED light and communication system includes at least one optical transceiver light fixture. The optical transceiver light fixture includes a plurality of light emitting diodes, at least one photodetector, and a processor. A facility management unit is in communication with the processor. The facility management unit is constructed and arranged to control the operation of the optical transceiver light fixture.

An LED light and communication system is in communication with a broadband over power line communications system. The LED light and communication system includes at least one optical transceiver light fixture. The optical transceiver light fixture includes a plurality of light emitting diodes, at least one photodetector, and a processor. A facility control unit is in communication with the light emitting diode light fixtures and a control server. The facility control unit is constructed and arranged to control the operation of the optical transceiver light fixtures.

A surge protected broadband power line communication system is provided. The system includes a local module with a base unit and a remote module with an extension unit. Both modules include broadband surge suppressors adapted to be connected to an AC power line. The base and extension units are connected to the surge suppressors and transmit and receive broadband digital signals through the surge suppressors and over the AC power line. The local and remote modules also have RF isolator filters connected to the surge suppressors and surge protected AC outlets connected to the outputs of the isolator filters. The local module is connected to a source of broadband digital signals such as a cable modem. The system makes the cable modem available in every room in a home simply by plugging an extension unit into an outlet located in that room.

The invention discloses a broadband power line communication network networking method which comprises the following steps: when any STA equipment of any network performs network access operation, monitoring for a period of continuous time, and judging whether a beacon frame of any network is received within the continuous time or not; if the beacon frame is received, judging whether the beacon frame of only one network is received or not; and if the beacon frames of at least two networks are received, enabling the STA device to send a network access request message to a CCO device of the network closest to the MAC address of the STA device. According to the networking method, the STA equipment can reasonably select the received beacon frame of the network when accessing the network; through the MAC address distance selection mode, the number of messages sent by STA equipment to non-corresponding network CCO equipment is reduced, waste of useless messages is avoided, meanwhile, the burden of a channel in the network access process is relieved, and the channel transmission quality and the channel resource utilization rate are improved.

The invention relates to a broadband power line communication method, in particular to a 35 kv-voltage grade line-based long-distance high-speed broadband power line communication method. The method comprises the following steps of: first, arranging a power communication device on a power line and coupling signals to the power line in a wired way; then, transmitting radio carrier signals to space according to high-voltage power line characteristics; and finally, receiving radio signals in a wireless way. Technicians overcome technical prejudices in the field, the radio signals transmitted by the power line and an antenna are acquired by a thought of taking the power line as the antenna and by adopting the method of transmitting by using the power line directly and receiving by using the antenna, so that the communication distance is expanded over 8 km successfully and effectively; therefore, the broadband power line communication with the first-stage relay of 14.5 km is realized.

The invention discloses a broadband power line communication cross-layer resource allocation method with prior hybrid service emergency degree in the technical field of low-voltage broadband power line communication. The method includes the steps that when emergency degree of a user and a fair effectiveness value of the user are determined under hybrid service; according to the emergency degree of the user under the hybrid service, the dispatching priority of the user is partitioned, and then according to the dispatching priority of the user and the fair effectiveness value of the user, the dispatching sequence of the user is determined; the QoS expected rate of the user is calculated on an MAC layer; according to the total number of groups capable of being borne by subcarrier of a physical layer and the QoS expected rate of the user, the user grouping number sent by the physical layer is determined; resource allocation is performed by the physical layer according to the user grouping number determined by the MAC layer. According to the method, through the inter-layer interaction information, the dispatching priority of the user is judged, the dispatching rate is adjusted, and the fairness performance of the user can be improved under the condition that the throughput performance of the system is guaranteed.

The present invention is suitable for the PLC technology field, and provides a networking method of broadband PLC equipment and a networking device of broadband PLC equipment. The method comprises the steps that a first PLC device broadcasts a first networking application message, so that a second PLC device determines that the first PLC device is located in a second networking range of the second PLC device and then sends the second networking response to the first PLC device; the first PLC device receives a second networking application message broadcasted by the second PLC device; the first PLC device determines whether the second PLC device is located in a first networking range of the first PLC device; if the second PLC device is located in the first networking range, the first PLC device sends the first networking response to the second PLC device, so that the first and second PLC devices finish the networking. According to the present invention, the operation is simple and convenient, and the networking efficiency is high.

The invention discloses a time calibration method and device in a broadband power line communication network. The method includes the steps of sending, to a subordinate node, a first packet including a first time that is the time for sending the first packet; receiving a response packet fed back by the subordinate node, the response packet including a second time and a third time; determining a fourth time when the response packet is received, and determining the link delay and processing delay according to the first time, the second time, the third time and the fourth time; and sending a second packet to the subordinate node at a fifth time, and instructing the subordinate node to perform time calibration processing according to the second packet which includes the fifth time, the link delay, and the processing delay. The method can accurately determine the link delay of the packet transmission and the processing delay of the lower node processing the packet, and by comprehensively considering the link delay and the processing delay, the lower node is allowed to complete the accurate time calibration according to the link delay and the processing delay.

The invention discloses a broadband power line OFDM subcarrier bit loading method based on curve fitting, and belongs to the technical field of broadband power line communication. According to the method, first of all, on the basis that subcarrier channel quality of an OFDM system is calculated, a subcarrier set is determined according to a minimum power criterion so that subcarriers whose power consumption satisfies requirements are determined; then according to the subcarrier quality, a subcarrier partition number and a partition subcarrier set are determined, and each partition two-dimensional space of the subcarriers is established so that subsequent curve fitting operation can be carried out; secondly, a bit curve is loaded in a fitting mode and a subcarrier bit loading quantity of each partition is determined; and finally, according to the curve fitting subcarrier loading bit quantities, loading operation is performed on the subcarriers, and thus resource distribution is completed. By use of the method, under the conditions of certain power consumption and a system rate, it can be ensured that the calculation complexity of bit loading resource distribution is effectively reduced and a bit resource distribution result is quite excellent.

The invention discloses a broadband power line communication cross layer dynamic spectrum allocation method. The system according to the method comprises user nodes and available subcarriers which are arranged in a broadband power line network. All the subcarriers are allocated according to the comprehensive link indexes of each user node in the broadband power line communication network, and the node of the maximum comprehensive link indexes acquires the subcarriers. Then the comprehensive link indexes including the number of neighbor nodes, the data packet transmission requirements, data packet average waiting time and the underlying channel characteristics of each user node are considered across layers, and dynamic spectrum allocation of broadband power line communication is realized across layers based on the comprehensive link indexes so that the overall transmission efficiency of the network is enabled to be optimal. The method is reasonable in design, dynamic spectrum allocation of broadband power line communication is realized across layers based on the comprehensive link indexes by facing the common lumped type communication scene in broadband power line communication so that the requirements of practicality and high efficiency of broadband power line communication can be met.

The invention discloses a broadband power line carrier communication implementation method, which comprises the following steps of: coupling a power line access signal to obtain a communication signal; performing adaptive filtering on the communication signal to remove a high-frequency signal and a noise signal; performing anti-interference processing on the filtered signal, and further removing an interference signal; carrying out windowing interpolation processing on the signal after anti-interference processing to acquire frequency domain information of the signal; and decoding the processed signal to obtain related data, packaging the related data according to other communication protocols, and transmitting the packaged related data to the outside. The invention further discloses an implementation device based on the method. The implementation device comprises a signal coupling module, a signal anti-interference and filtering module, a signal demodulation and decoding module and adata conversion and sending module. According to the invention, the interference of noise on signals can be effectively removed and suppressed, the signal analysis level of power line communication isimproved, the overall quality of power line communication transmission is improved, and a guarantee is provided for the application of a broadband power line communication technology.

Disclosed is an advanced metering infrastructure (AMI) system, used in a power system that comprises a high-voltage power supplying switch, at least one transformer and at least one smart meter. Each transformer has one end connected to at least one smart meter and has another end connected to the high-voltage power supplying switch or at least another transformer. The AMI system comprises a plurality of power line bridges and at least one data concentrator unit (DCU). Each power line bridge is connected to the transformer in parallel. The DCU has one end electrically connected to the power line bridge. The power line bridge has one end electrically connected to the smart meter, and another end electrically connected to the DCU. The power line bridge communicates with the smart meter via the narrowband power line communication (NPLC), and communicates with the DCU via the broadband over power line communication (BPLC).