568results about "Star-type electromagnetic networks" patented technology

The embodiment of the invention discloses a method for controlling an optical module by a single board in an OLT (Optical Line Terminal) and a related device. A single board of an OLT can obtain information such as an identifier of a target ONU and a target working rate of the target ONU in the uplink time slot distribution process, and the single board sends the information to an optical module through a target interface. And the optical module determines working parameters according to the information carried in the target message. For example, the operating parameters of an equalizer, an amplifier, a filter and a laser are determined. That is to say, a new interface scheme between the single board and the optical module is provided, the single board can transmit more information to the optical module through the new interface scheme, and the requirement of the single board for controlling the optical module with higher complexity and higher efficiency is met.

Hub node of a passive optical network, wherein the hub node includes a DSP (Digital Signal Processing) chain configured to: Receiving a signal burst from a leaf node in the passive optical network, wherein the signal burst comprises a frame including a payload and a frame header, the frame header comprising a clock and gain control section, a frame detection section and an equalizer section; Retrieving a clock phase of the leaf node from the clock-and-gain control section of the frame header; Estimation of the signal strength of a signal burst from the leaf node in the passive optical network; Compensation for differences in the signal power of the signal burst from the leaf node; Detecting a frame alignment sequence that indicates the arrival of the signal burst; Determination of MIMO (Multiple Input, Multiple Output) polarization filter coefficients from the frame alignment sequence; Aligning the phase between the X-polarization and Y-polarization of the signal burst using the MIMO polarization filter coefficients; and Determine the frequency offset estimate (FOE) of a local oscillator signal.

The invention provides a communication method, a communication device and a PON (Passive Optical Network) system, which can solve the problem of SN (Serial Number) conflict in a PON network and improve the system performance of the PON network. The method comprises: an OLT device receives a first SN from a first ONU device in a first time window, allocates a first ONU identifier to the first ONU device, and then broadcasts and sends first indication information and the first ONU identifier, the first indication information being used for indicating that the OLT device successfully allocates the first ONU identifier to the first ONU device. Thereafter, the OLT device receives a second SN from the second ONU device at a second time window, the second SN being the same as the first SN. And the OLT device determines whether to allocate a second ONU identifier to the second ONU device based on the authentication result of the first ONU device.

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.

The invention provides an abnormal ONU detection method and system, electronic equipment and a computer readable storage medium. The detection method comprises the following steps: detecting a plurality of subcarrier wave bands; under the condition that the abnormal subcarrier wave band is detected, scheduling the ONU on the abnormal subcarrier wave band to a test detection wave band in the plurality of subcarrier wave bands; and judging whether the test detection wave band is abnormal or not, and determining an abnormal ONU in the abnormal subcarrier wave band according to a judgment result. Therefore, after the abnormal subcarrier wave band is detected, the ONU on the abnormal subcarrier wave band can be scheduled to other subcarrier wave bands (namely the test detection wave band) of the plurality of subcarrier wave bands by utilizing the characteristics of the plurality of subcarriers, and whether the scheduled ONU is abnormal or not is judged by judging whether the other subcarrier wave bands are abnormal or not. According to the invention, which ONUs in the abnormal subcarrier wave band are abnormal ONUs can be effectively detected, so that the abnormal ONUs can be effectively detected.

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.

An optical fiber sensing system according to the present disclosure includes an optical fiber (10) having one end connected to an ONU (21), an optical output unit (211) configured to output pulsed light to the one end of the optical fiber (10), an optical input unit (212) configured to receive backscattered light for the pulsed light from one end of the optical fiber (10), and a detection unit (213) configured to transmit state information indicating a state around the optical fiber (10) based on the backscattered light.

An embodiment of the present disclosure provides a method for registering an optical network unit, which is used for an optical line terminal and includes: sending registration configuration information according to the registration information of the optical network unit to be registered obtained in advance to complete the registration of the optical network unit to be registered; wherein the registration information of the optical network unit to be registered is obtained before the start of this registration. An embodiment of the present disclosure also provides a method for writing registration information, an optical line terminal, an optical network unit, a preposed optical network unit, and a registration device.

This application provides a port detection method and apparatus. In the technical solutions in this application, an OLT or an ONU may determine, based on at least two wavelengths and a preset correspondence, port information that is of an optical splitter and that corresponds to the ONU. That is, a branch port directly or indirectly connected to the ONU is defined by using the at least two wavelengths. In this way, different branch ports can be distinguished by using combinations of a plurality of wavelengths, to define a large quantity of branch ports of the optical splitter by using free combinations of a small quantity of wavelengths.

A first coherent transceiver for a CPON includes a MAC layer for enabling dual-mode operation of the first coherent transceiver, a software management and control module for communicating with a second transceiver over an ODN communication channel, a coherent DSP in communication with the software management and control module and configured to process a digital signal from the MAC layer, and an optics infrastructure configured to transmit and receive analog data signals over the ODN to and from the second transceiver, respectively. The analog data signals include a communication subcarrier and a data subcarrier. The digital data signal includes a first data portion with control information from the communication subcarrier, and a second data portion with primary information from the data subcarrier. The coherent DSP further dynamically reconfigures digital data signal processing between first and second operational modes based on a transport type of the data channel subcarrier.

A method of communication includes notify, by an optical line terminal (OLT), an optical network unit (ONU) a first time period assigned to a first power saving operation and a second time period assigned to a second power saving operation, and perform, by the OLT, the second power saving operation for a receiver of the OLT during the second time period and the first power saving operation for a transmitter of the OLT during the first time period.

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.

An aspect of the present invention is a station-side optical network unit to be connected to a subscriber-side optical network unit, the station-side optical network unit including: an acquisition unit that acquires, from the subscriber-side optical network unit, a signal-to-noise ratio of a received signal transmitted from the station-side optical network unit and received by the subscriber-side optical network unit; a deriving unit that derives a physical quantity indicating a quality of the received signal from the signal-to-noise ratio acquired by the acquisition unit; and a setting unit that sets a power of a signal transmitted by the station-side optical network unit to a minimum power among powers at which the physical quantity derived by the deriving unit indicates a predetermined quality.

Example embodiments describe an optical line terminal (OLT) configured to communicate in a point-to-multipoint optical network with optical network units (ONUs); where the OLT and a respective ONU share a set of shared keys. The OLT configured to perform receiving, from a respective ONU, at least one identifier encrypted according to a preconfigured encryption algorithm and a preconfigured key; wherein the at least one identifier is characteristic for the respective ONU. The OLT configured to perform decrypting the at least one received identifier according to the preconfigured encryption algorithm and the preconfigured key; and determining at least one shared key based on the at least one decrypted identifier.

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.

According to an aspect of an embodiment, an optical network unit (ONU) in a passive optical network (PON) may comprise a physical media dependent (PMD) receiver, a detector, and a processing device. The PMD receiver may be configured to receive a downstream signal from an optical line terminal (OLT). The detector may be configured to measure a link quality parameter in the downstream signal. The processing device may be configured to identify a link quality parameter target, wherein the link quality parameter target is a value that achieves a target error probability. The processing device may be configured to compute a link quality parameter margin between the measured link quality parameter and the link quality parameter target, and adjust a transmission parameter based on the link quality parameter margin.

A solution is provided for processing optical signals, wherein a mixing signal and a transmission carrier are both derived from a single light source, and wherein the mixing signal is located within a frequency band of a received signal and / or wherein the transmission carrier is located within the frequency band of the transmission signal.

In various embodiments, the present disclosure includes a system for sending 50 gigabits per second (Gbps), 75 Gbps, and 100 Gbps at 50 gigabaud (GBaud) for passive optical networks (PON) downstream and upstream. The system allows for transmission of three data rates at a single baud-rate while only using 2-bits of information per sample. A motivation for sending three data rates at a single baud-rate is to allow for further granularity in the control of the data-rates for downstream and upstream traffic in a flexible PON system based on the link margin. For example, the system can use non-return-to-zero (NRZ) at 50 GBaud for 50 Gbps and can use four-level pulse-amplitude modulation (PAM-4) at 50 GBaud for 100 Gbps. In addition for 75 Gbps, a double square-8 (DSQ-8) constellation can be used at 50 GBaud.

Optical data communication methods, corresponding orchestrator, system, access point equipment and computer program. The invention relates to a method for optical data communication between an OLT and a UE via an AP, comprising: - coordinating (50), via an orchestrator, the control plane of the optical data communication protocol and the control plane implemented between the AP and the UE, - optical data communication (51) between the OLT and the UE via the AP, taking into account the coordination of the control planes. Figure for abstract: figure 5

A system that supports geographically dispersed remote optical line terminals.

To provide an express path capable of reducing latency between an edge of a data center and leaf nodes.SOLUTION: An optical communication system includes a hub optical transceiver, a power splitter, and a plurality of spoke transceivers. The hub optical transceiver is configured for receiving a spectrum of wavelengths. The power splitter is coupled to the hub optical transceiver, and operates as a passive device that is configured to replicate the spectrum of wavelengths and output a plurality of replicated spectrum of wavelengths, and each replicated spectrum of wavelengths has a corresponding power that is a fraction of a total power received from the hub optical transceiver. The plurality of spoke transceivers is coupled to the power splitter and each of the plurality of spoke transceivers is configured to receive a corresponding one of the plurality of replicated spectrum of wavelengths.SELECTED DRAWING: Figure 4A

An IC-TROSA optical network system includes at least one optical network coupled to subscriber device(s) and a hub device. The hub device includes a hub coherent optical transceiver device with a hub IC-TROSA device that couples the hub device to the subscriber device(s) via the optical network(s). The hub IC-TROSA device includes an optical hybrid mixer subsystem, a first receive connection that receives first optical signals from the subscriber device(s) via the optical network(s) and provides them to the optical hybrid mixer subsystem, and a second receive connection that receives second optical signals from the subscriber device(s) via the optical network(s) and provides them to the optical hybrid mixer subsystem. The optical hybrid mixer subsystem mixes the first and second optical signals and provides mixing results for conversion to first and second electrical signals that are then transmitted to a hub signal processing subsystem.

A network or system in which a hub or primary node may communicate with multiple leaf or secondary nodes. The hub node may operate at or have a capacity greater than that of the leaf nodes. Accordingly, relatively inexpensive leaf nodes may be deployed that receive data carrying optical signals from the hub node and provide data carrying optical signals to the hub node. One or more connections may couple each leaf node to the hub node, whereby each connection may include, for example, one or more spans or segments of optical fiber, optical amplifiers, optical splitters / combiners, and optical add / drop multiplexers. Optical subcarriers may be transmitted across such connections, each carrying a data stream. The subcarriers may be generated by a combination of lasers and modulators, eliminating the need for and reducing costs of multiple lasers and modulators. Furthermore, as the bandwidth or capacity requirements of the leaf nodes change, the number of subcarriers, and therefore the amount of data provided to each node, may change accordingly. Each subcarrier within a dedicated group of subcarriers may carry OAM or control information to a corresponding leaf node, and such information may be used by the leaf node to configure the leaf node to have a desired bandwidth or capacity.

Systems and methods for mapping optical connections in an FDH are disclosed. An example system includes an FDH and a computing device. The FDH includes a bulkhead having: a plurality of passive optical couplers each having a respective first port to receive a respective first optical fiber, a respective second port to receive a respective second optical fiber, and a respective passive optical activity indicator configured to expose first light propagating in the respective first optical fiber, and second light propagating in the respective second optical fiber; and an image sensor configured to capture one or more images of the plurality of passive optical activity indicators. The computing device configured to, based on the one or more images, determine which of the plurality of passive optical couplers are receiving a first optical signal at their respective first port and / or receiving a second optical signal at their respective second port.

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.

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.

[0003] In an embodiment of the present application, an optical splitting device and an optical splitting system are disclosed, which enable the optical splitting device to be connected to more ONTs in a scenario with a relatively high user density, thereby reducing investment costs and construction difficulties. The optical splitting device includes a housing, at least one first optical splitter, a multi-core input optical interface, a multi-core output optical interface, and at least one single-core output optical interface. The multi-core input optical interface, the multi-core output optical interface, and the at least one single-core output optical interface are arranged on an outer wall of the housing, and the at least one first optical splitter is arranged within the housing, and each first optical splitter includes an input end, a first output end, and at least one second output end. The multi-core input optical interface is connected to the input end of the at least one first optical splitter, the first output end of each first optical splitter is connected to the multi-core output optical interface, and the second output end of each first optical splitter is connected to the single-core output optical interface in a one-to-one correspondence.

To provide a device and a method for managing a burst mode receiver within an optical line terminal (OLT) in a passive optical network.SOLUTION: An OLT includes a burst mode receiver 111 that decodes an optical burst signal 210 from an optical network unit (ONU) into a decoded output signal 220 by one or more digital signal processing (DSP) circuits 201-204 that process the signal at respective configurable processing speeds. The burst mode receiver includes means 205 for performing obtaining a symbol rate 240 of a next optical burst signal 215, and adjusting 234 configurable processing speeds 230 of the one or more DSP circuits based on the symbol rate 240 of the next optical burst signal 215 during an interval between reception of a valuable symbol in a preceding optical burst signal 211 and reception of a valuable symbol in the next optical burst signal 215.SELECTED DRAWING: Figure 2

A system including a passive optical network.