219results about "Star-type electromagnetic networks" patented technology

Systems and techniques for forward error correction decoding process power reduction are described herein. A first codeword is identified in a network transmission. A conditional decoding window starting with the first codeword is generated. The conditional decoding window is aligned with frames of the network transmission. A report is generated that includes an indication of a correlation of the conditional decoding window to the network device. The conditional decoding window and the report are sent to the network device. A conditional decoding window including a first codeword is received. The first codeword is decoded to determine a second codeword. A report is obtained that includes a codeword correlation bit for the second codeword. Upon determining that the codeword correlation bit indicates that the second codeword is not correlated, the second codeword is discarded without decoding the second codeword.

A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber / power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber / power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (POE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber / power cable and the PoE-compatible connection.

Quantum networks having topologies defined by connected entanglement graphs which comprise plural vertices connected by plural edges are disclosed. The entanglement graphs are not all-to-all connected. The entanglement graphs may be non-planar graphs. At least some of the vertices are connected to three or more of the edges. Nodes of the quantum network correspond to vertices of the entanglement graph. Entanglement means are operable to directly entangle quantum systems in those pairs of the nodes which respectively correspond to vertices of the entanglement graph that are connected by an edge of the entanglement graph. Optical paths used by the entanglement means may include optical paths provided by braids or knots that are configured to interface to one or more units which include the nodes.

The invention comprises distribution point unit (DPU) including a host for a GPON ONU / ONT module, CPU system-on-chip (SoC) providing a DPU and traffic management, a reverse power harvester and a high speed electrical (HSE) module and the DPU receiving optical signals via the GPON ONU / ONT module and converting to electrical signals and the HSE module transmitting electrical signals via a twisted pair or coaxial cable to a customer premises equipment (CPE) within a home or building and the reverse power harvester receiving power from the HSE module and the GPON ONU / ONT and HSE modules are pluggably mateable to the DPU.

Methods, systems, and apparatus for identifying rogue Optical Network Unit (ONU) are disclosed. An Optical Line Terminal (OLT) detects error conditions on a passive optical network (PON) that includes optical networking units (ONUs) transmitting over the PON. The OLT disables and enables different sets of ONUs to identify a rogue ONU that is causing an error condition. The OLT classifies ONUs as a first set of suspect ONUs based on the error condition on another ONU being resolved when the suspect ONUs were disabled. The OLT classifies ONUs as a second set of suspect ONUs that causes the error condition to be present when the suspect ONUs are enabled. The OLT identifies the rogue ONU based on the rogue ONU being included in both of the first set of suspect ONUs and the second set of suspect ONUs.

An optical fiber connector, an optical distribution network device, and an optical communication system, wherein the optical fiber connector includes a first ferrule, a second ferrule, a fiber grating, and a housing part. The fiber grating penetrates through the first ferrule and the second ferrule. The housing part is sleeved on the first ferrule and the second ferrule. The optical fiber connector optically interconnects to a network port on the optical distribution network device, and an optical signal uploaded from an optical network terminal is modulated by the optical fiber connector and then arrives at an optical line terminal.

A system is provided for wavelength control in a passive optical network (PON) with point to multi-point (P2MP) topology. The system comprises a central node and a plurality of end nodes. The system comprises a central node transceiver configured for broadcasting to end nodes a reference signal carrying a management information, wherein the management information indicates a target frequency assigned to each end node, and an end node transceiver in each end node. The end node transceiver in each end node is configured for determining the target frequency by extracting the management information from the reference signal, generating a beating frequency by beating the reference signal with an uplink laser signal, and controlling a wavelength of the uplink laser signal to lock to the target frequency based on the beating frequency.

Provided is a method for registering an optical network unit. The method is used for an optical line terminal. The method for registering an optical network unit comprises: according to pre-acquired registration information of an optical network unit to be registered, issuing registration configuration information, so as to complete registration of said optical network unit, wherein the registration information of said optical network unit is acquired before the present registration starts. Further provided are a method for writing registration information, an optical line terminal, an optical network unit, a front-facing optical network unit, and a registration device.

Systems and methods for operating a passive optical network (PON) extender. The methods comprise: receiving, by the PON extender, a first optical signal from a remote node device of a passive optical network via a first optical link; amplifying the first optical signal using a Raman amplifier of the PON extender to obtain a first Raman amplified optical signal; amplifying the first Raman amplified optical signal using a first optical amplifier of the PON extender to obtain an amplified uplink signal (wherein the first optical amplifier is different than the Raman amplifier); and passing the amplified uplink signal to an optical line terminal via a second optical link (wherein the optical line terminal is disposed locally at a hub site along with the PON extender).

A coupling module can be used to communicate high speed signals between an optical transceiver and a processing module of an optical communication device, such as an optical line termination (OLT) or an optical network unit (ONU). The coupling module can adjust the common mode voltage level of a differential signal output by the optical transceiver to the common mode voltage level required by the processing module. In addition, the coupling module splits each of the differential output signals from the optical transceiver and passes the split signals to both a high-pass filter and a low-pass filter that are connected in parallel. The outputs of the high-pass filter and the low-pass filter from different paths of the differential signal are cross-coupled and combined to provide a differential signal to the processing module.

The invention relates to an optical transceiver device (1) for transmitting and receiving optical signals in and from one or more optical fibres (61, 62), the device (1) comprising: a connection port (2) configured to allow the connection of the one or more optical fibres (61, 62) to the device (1), the connection port (2) comprising a transmit connector (21) and a receive connector (22), at least one transmitter (3) configured to be connected to a transmit optical fibre (61) via the transmit connector (21) and configured to transmit an optical signal transmitted towards the transmit optical fibre (61), at least one receiver (4) configured to be connected to a receive optical fibre (62) via the receive connector (22) and configured to receive an optical signal received from the receive optical fibre (62), at least one first device (51) for emitting visible light that is configured to be connected to the transmit optical fibre (61) and / or to the receive optical fibre (62) via the transmit connector (21) and / or the receive connector (22) and configured to emit a first light signal into the transmit optical fibre (61) and / or the receive optical fibre (62).

Select a transmission wavelength suitable for light propagation in free space. [Solution] The optical communication device comprises an optical transmitting unit that transmits a main signal, which is an optical signal, into free space, and a control unit that controls the wavelength of the main signal transmitted by the optical transmitting unit.

A passive optical network is used for communications in a data center between an Optical Line Terminal (OLT) in an Ethernet switch and an Optical Network Terminal (ONT) in a compute node in a server. The passive optical network reduces the latency from microseconds to single digit nanoseconds in both upstream and downstream directions that can result in an increase in application performance. In addition, because the passive optical network does not use active components, the passive optical network has a reduced Mean Time Between Failures that can be decades or centuries.

Provided is an optical communication device including: one or more light distribution units configured to include a first surface having a plurality of first ports and a second surface different from the first surface having a plurality of second ports, have one or more subscriber transmission device ports to which n (n is an integer equal to or greater than 1) subscriber transmission devices are connected and one or more downlink signal ports allocated to the plurality of first ports, have one or more subscriber reception device ports to which n subscriber reception devices are connected and one or more uplink signal ports allocated to the plurality of second ports, and output optical signals input from the first ports from the second ports; and a light distribution control unit configured to control a connection relationship between the plurality of first ports and the plurality of second ports of the one or more light distribution units.

An optical burst mode receiver and methods of operation are disclosed. The optical burst mode receiver may comprise means for determining a first parameter associated with a first transimpedance amplifier, TIA, in response to the first TIA receiving a first burst mode signal, means for determining a configuration setting for at least a second, different, TIA based at least in part on the first parameter; and means for configuring at least the second TIA, for receiving a second burst mode signal, based at least in part on the configuration setting.

A test apparatus and method for testing passive optical networks is provided. The test apparatus includes an optical circuit having an optical coupler for splitting off a portion of optical traffic. During testing of a passive optical network, the optical circuit is coupled into an optical path of the passive optical network. A bit stream corresponding to an activating procedure is captured and analyzed to extract identification information of the module that sent the bit stream.

A burst-mode laser driver includes a driver circuit, a switching circuit, and an energy recycling or harvesting circuit. The driver circuit is adapted to be electrically coupled to a burst-mode laser, the driver circuit configured to control a bias current supplied to the burst-mode laser to change the laser between the burst-on and the burst-off state. The switching circuit is electrically coupled to the driver circuit and adapted to switch the bias current between the laser during a burst-on state and a dummy electrical path during a burst-off state. The energy recycling circuit electrically coupled to the switching circuit and is adapted to harvest at least a portion of energy from the bias current during the burst-off state.

The invention relates to a segmented speed measurement method and system between FTTR main devices, and belongs to the technical field of computers.The method comprises the steps that a network topological graph is obtained in real time, and the network topological graph is of a tree-shaped or star-shaped structure with a main gateway as a root node, network devices as nodes and links as edges; determining the topology type of the network topological graph according to the network topological graph and the topology type logic, and identifying a link pair capable of parallel speed measurement based on the topology type; and under the condition of receiving a speed measurement instruction, according to the network state and the resource state, judging whether to carry out priority grouping on the link pairs capable of carrying out parallel speed measurement, and carrying out parallel speed measurement on the link pairs capable of carrying out parallel speed measurement based on a judgment result. According to the method, on the premise that the speed measurement accuracy is not affected, the speed measurement efficiency is improved, inconvenience caused by speed measurement waiting of a user is reduced, and the user experience and satisfaction degree are improved.

A pull-back fiber cable installation for multi dwelling units includes a first distribution point disposed between a first group of twelve units and a second group of twelve units, a second distribution point disposed between a third group of twelve units and a fourth group of twelve units, and a twelve fiber distribution cable optically connected to the first and second distribution points. Each fiber of the distribution cable is cut between the first and second distribution point. A first portion of the cut fiber is spliced to a first drop cable that runs to a first unit of the second group of twelve units, and a second portion of the cut fiber is spliced to a second drop cable that runs to a first unit of the third group of twelve units.

Method, system and device for monitoring temperature in a fiber optic network, including an OLT(110) and customer devices (121,122) connected through a link (100), using existing protocols and without additional hardware, as the OLT (110) performs: measuring the round-trip delay (RTD) between each customer device (121) requiring synchronization with the customer devices (122) previously set in service and connected to the link (100) at scheduled intervals, and estimating variations in RTD to determine temperature changes (ΔT) in the link (100). Additionally, the method allows generating temperature maps by calculating the variation in average temperature along the link by dividing it into segments and calculating the average temperature variation iteratively, starting from the initial segment between the OLT (110) and the closest customer device and progressing through subsequent segments. This calculation provides points of temperature along the fiber tree and the information of several trees can be represented together to build a 2D map.

A system for powering a network element of a fiber optic wide area network is disclosed. When communication data is transferred between a central office (CO) and a subscriber terminal using a network element to convert optical to electrical (O-E) and electrical to optical (E-O) signals between a fiber from the central office and twisted wire pair, coaxial cable or Ethernet cable transmission lines from the subscriber terminal, techniques related to local powering of a network element or drop site by the subscriber terminal or subscriber premise remote powering device are provided. Certain advantages and / or benefits are achieved using the present invention, such as freedom from any requirement for additional meter installations or meter connection charges and does not require a separate power network.

Provided are a communication method, device, and system and a storage medium. The method applied to a communication system includes splitting different optical power loss levels from optical path loss levels formed by a first loss value and a second loss value of an optical distribution network of a passive optical network system, where the minimum value and the maximum value of each optical power loss level are each greater than or equal to the first loss value and less than or equal to the second loss value, the first loss value is the minimum optical path loss of the optical distribution network, and the second loss value is the maximum optical path loss of the optical distribution network; and connecting different first communication devices to the passive optical network system according to the different optical power loss levels.

Passive optical couplers having passive optical activity indicators and methods of operating the same are disclosed. An example passive optical coupler for passively coupling first and second optical fibers includes a housing including: a first port configured to receive an end of a first optical fiber, and a second port configured to receive an end of a second optical fiber; and a passive optical activity indicator positioned at least partially within the housing, wherein a first portion of the passive optical activity indicator is exposed through the housing, and wherein the passive optical activity indicator is configured to passively illuminate in response to (i) first light propagating in the first optical fiber when the end of the first optical fiber is received in the first port, and (ii) second light propagating in the second optical fiber when the end of the second optical fiber is received in the second port.

This optical communication system includes an optical line terminal (OLT) and a plurality of optical network units (ONU) connected to the OLT. The OLT notifies the plurality of ONUs of the power of an optical signal received from the ONU. Each ONU includes: an optical output unit that outputs an optical signal; and a control unit that controls, in accordance with the power notified from the OLT, the power of the optical signal output from the optical output unit.

A secure communication method of a PON system. First, the OLT sends a first message to the ONU, the first message comprising a first key algorithm, a certificate of the OLT and a public key of the OLT, the first key algorithm being a key algorithm supported by both the OLT and the ONU. The ONU verifies the certificate of the OLT, and after verification, determines a shared key according to the first key algorithm and the public key of the OLT. Then, the ONU sends a second message to the OLT, the second message comprising a certificate of the ONU and a public key of the ONU. After receiving the second message, the OLT verifies the certificate of the ONU, and after verification, determines a shared key according to the first key algorithm and the public key of the ONU. Further, the ONU and the OLT can use the shared key to encrypt the messages and data of the session or communication. The method realizes the bidirectional authentication of the OLT and the ONU without introducing other devices or entities, not only improves the security of the system and reduces the difficulty of operation and maintenance, but also strengthens the security protection of the data and improves the security level of the communication.

Aspects of the subject disclosure may include, for example, determining distinct timing offsets between an input port and output ports of a multiport optical device. An optical signal is injected at an input port of the device to obtain output signals at the output ports, which are injected into downstream fibers. An optical multipath return signal is received via the input port of the device, including a combination of measured events including reflections, backscatter, or both. A number of similar events expected in the number of downstream optical fibers is calculated to obtain an expected multipath signature based on configuration data. Results of the optical multipath return signal are then compared to the expected multipath signature to obtain comparison results. One of the measured events is distinguished from the others based on the first comparison results and the distinct timing offsets. Other embodiments are disclosed.