331results about "Star-type electromagnetic networks" patented technology

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.

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 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 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.

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.

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.

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

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 system including a passive optical network.

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.

This application provides an optical splitter, applied to the optical communication field. The optical splitter includes an optical splitting unit, a control unit, and a photoelectric composite unit. The optical splitting unit is configured to receive a downlink optical signal from a main gateway, and transmit N downlink optical sub-signals to the photoelectric composite unit. The control unit is configured to transmit N first electrical signals with different frequencies to the photoelectric composite unit. The photoelectric composite unit includes N ports. The N ports are configured to connect to N sub gateways through photoelectric composite cables respectively. The photoelectric composite unit is configured to output the N downlink optical sub-signals through the N ports respectively, and output the N first electrical signals with the different frequencies through the N ports respectively. In this application, operation and maintenance information may be transmitted to the sub gateway by using the first electrical signal, to improve network operation and maintenance efficiency.

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.

The present disclosure relates to a downstream signal synchronization method and system, and relates to the field of passive optical networks. The method is applicable to a wavelength division multiplexing passive optical network. Specifically, when an optical network unit (ONU) is in an operating state, it can detect whether a situation where the synchronization of the downstream signal is lost has occurred. The downstream signal includes a management path signal and a data path signal. When a situation occurs where the synchronization of the management path signal is lost and the data path signal is normally synchronized, the ONU switches from the operating state to a management path synchronization loss sub-state, monitors a first recovery time for the ONU to recover the synchronization of the management path signal in the management path synchronization loss sub-state. If the first recovery time does not exceed a first predetermined time threshold and the data path signal is still normally synchronized, the ONU returns from the management path synchronization loss sub-state to the operating state. In this way, it is possible to avoid the problem that the ONU goes out of management due to the absence of a state transition method in the situation corresponding to the original state machine.

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.