514 results about "Optical line termination" patented technology

A burst-mode optical receiver for an optical line terminal (OLT) of a passive optical network (PON) comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to a burst-mode optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a burst-mode TIA with a large dynamic range and provides for fast switching. The burst-mode optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention discloses a DBA management method and device in an FTTR scene and an optical line terminal. The method is applied to a PON MAC chip, wherein the PON MAC chip comprises a CPU unit and a logic unit. The method comprises the following steps that: a CPU (Central Processing Unit) determines the uplink service bandwidth of each AllocID in each sub-period in the current DBA period; the CPU unit takes at least part of the sub-periods as sub-distribution periods, and determines BWMap data of the first sub-distribution period and the second sub-distribution period; the CPU unit sends the length of the silent window, the BWMap data of the first sub-allocation period, the BWMap data of the second sub-allocation period and the total length of the current DBA period to the logic unit; the logic unit determines the number of the remaining sub-allocation periods in the current DBA, and takes the BWMap data of the second sub-allocation period as the BWMap data of each remaining sub-allocation period to obtain complete BWMap data in the current DBA period; and the logic unit sends the BWMap data of the current DBA period, so that the problem that the DBA cannot adapt to the use requirement of the FTTR scene is solved, and the low-delay requirement of the DBA is met.

A redundancy link includes a first optical splitter and a second optical splitter. The first optical splitter includes (i) a first hub-side port that optically couples to a first optical line terminal, a first hub-side failover-mode port, (iii) a first plurality of node-side splitter-ports each optically coupled to the first hub-side port and the first hub-side failover-mode port, (iii) a first failover-mode port coupled to the first hub-side port. The second optical splitter includes (i) a second hub-side port that optically couples to a second optical line terminal, a second hub-side failover-mode port optically coupled to the first failover-mode port, (iii) a second plurality of node-side splitter-ports each optically coupled to the second hub-side port and the second hub-side failover-mode port, (iii) a second failover-mode port coupled to the second hub-side port.

A management method, device and system for sub-gateways in an FTTR and a storage medium, the method is applied to a main gateway, at least one sub-gateway including a target sub-gateway is hung under the main gateway, the main gateway is connected with an optical line terminal (OLT), a mapping table of the main gateway records a corresponding relationship among the target sub-gateway, a lower ONU ID and an upper ONU ID, and the target sub-gateway is connected with the lower ONU ID and the upper ONU ID. The method comprises the following steps: acquiring a first GEM frame; according to the downlink ONU ID, a second frame header of the first GEM frame is determined, a new first GEM frame is obtained, the new first GEM frame is sent, and the new first GEM frame carries the second frame header, the first frame header and a management request message marked by the uplink ONU ID; receiving a second GEM frame returned by the target sub-gateway for the new first GEM frame; and determining a fourth frame header corresponding to the second GEM frame according to the uplink ONU ID, generating a new second GEM frame, and sending the new second GEM frame to the OLT, thereby achieving the purpose of managing the target sub-gateway by the OLT.

The invention discloses a PON-based multi-protocol communication method and device, and the method comprises the steps: distributing a corresponding internal scheduling time slot to each network protocol processing unit for data uploading to each network protocol processing unit when a data processing module detects that the network protocol processing units connected with each field bus device have to-be-uploaded service data; and when one internal scheduling time slot is used up, interrupting the uploading of the service data until the next internal scheduling time slot allocated to the internal scheduling time slot is recovered from interrupting the uploading of the data. And the PON module monitors a global scheduling time slot allocation instruction issued by the optical line terminal in real time, converts an uploaded data frame into an electric signal, transmits the electric signal to the optical module through an internal link, converts the electric signal into an optical signal through the optical module in an allocated global scheduling time slot, and uploads the optical signal to the optical line terminal through an optical distribution network. Real-time performance and orderliness of transmission of service data in multiple field bus devices in a PON network are achieved, the requirement of industrial communication for data transmission is met, and transmission resource distribution is optimized.

The invention provides an optical transmission system compatible with ROF and PON, which comprises an optical line terminal, an analog signal processing unit, an optical distribution network unit and a plurality of user terminals, and is characterized in that the optical line terminal is connected with the optical distribution network unit and is used for sending digital signals to the optical distribution network unit; the analog signal processing unit is connected with the optical distribution network unit and is used for receiving and processing the analog input signal and sending the processed analog signal to the optical distribution network unit; the optical distribution network unit is used for receiving and mixing the digital signal and the analog signal to obtain a mixed signal; before the mixed signals are transmitted to the user terminals, the digital signals and the analog signals are split according to a plurality of preset user channels and then transmitted to each user terminal. The system is simple in architecture, engineering construction and engineering maintenance are convenient, and the wireless coverage system can be rapidly deployed by using the existing optical fiber network at present.

The invention discloses a power distribution network automatic communication data packet forwarding method based on an improved EPON technology, and the method comprises the steps: 1, classifying and scheduling data packets, and determining the transmission sequence of data packets with different priorities through weighted polling scheduling; step 2, an optical line terminal (OLT) receives the data packet and records sending address information and forwarding rules of the data packet; step 3, the ONU extracts a target address and a forwarding rule, and obtains a position and a connection state to calculate an optimal data transmission path; and step 4, monitoring and managing the operation state, and ensuring the forwarding stability and reliability of the data packet. According to the method for realizing artificial intelligence by improving the EPON technology, automatic communication data packet forwarding is realized, and the transmission efficiency is improved.

A network interface device (NID) is provided to accommodate the receipt and transmission of optical signals according to multiple standards in a single customer premises device. This permits the network service provider, among other things, to deliver one NID to any customer premises, whether or not the particular customer premises is currently being served by an optical line terminal (OLT) providing first protocol service or second protocol service. As a network is upgraded (e.g., from first protocol service to second protocol service), the network service provider can connect the customer premises to an OLT providing the upgraded second protocol service and then programmatically alter the NID to transceive signals according to the upgraded standard without requiring a new NID to be delivered or installed at the customer premises.

The invention provides an optical network conflict detection method and device and a storage medium, relates to the technical field of communication, and is used for identifying a target optical network unit causing coexistence conflicts. The method is applied to an optical line terminal, the optical line terminal accesses a first passive optical network and a second passive optical network, and the method comprises the following steps: in response to detecting that a first coexistence conflict feature exists, stopping uplink transmission of an optical network unit in the second passive optical network; when it is detected that the second coexistence conflict feature exists, uplink transmission of the optical network unit in the second passive optical network is recovered according to a preset strategy, and whether the first coexistence conflict feature exists or not is detected again; wherein the coexistence conflict degree represented by the second coexistence conflict feature is smaller than the coexistence conflict degree represented by the first coexistence conflict feature; and under the condition that the existence of the first coexistence conflict feature is detected again, determining that the optical network unit which recovers uplink transmission last time is a target optical network unit which causes the coexistence conflict.

The invention relates to the technical field of optical line terminal configuration, in particular to a method and system for automatically configuring optical line terminals of different manufacturers based on artificial intelligence. The method comprises the steps of collecting multi-source heterogeneous data to train a deep learning model, constructing a Transform or RNN-based architecture of a TensorFlow framework, performing cross validation and model compression, then performing optimization through a TensorRT inference engine, developing an intelligent configuration application system, deploying the intelligent configuration application system to a control host, and providing algorithm support for automatic configuration. By constructing an automatic configuration system based on artificial intelligence, the problems of heterogeneous compatibility and intelligent configuration of OLT equipment of multiple manufacturers are systematically solved. In a configuration optimization link, a virtual simulation environment is constructed based on a real network topology, a configuration effect is evaluated through multi-dimensional indexes such as throughput and time delay, potential conflicts are detected in combination with an AI algorithm, an optimization scheme is generated, and the configuration error rate of manual operation is reduced.

The embodiment of the invention provides a downlink service sending method and device, a downlink service receiving method and device, a storage medium and an electronic device. The downlink service sending method comprises: an optical line terminal (OLT) shares a downlink time division scheduling result of a downlink service with an optical network unit (ONU) according to a first specified mode, the downlink time division scheduling result at least comprising sending moments of one or more downlink services; and the OLT sends a downlink service according to the downlink time division scheduling result. According to the method, the problem that the optical network unit cannot efficiently receive the downlink service sent by the optical network terminal is solved, and the technical effect that the optical network unit can efficiently receive the downlink service sent by the optical network terminal is achieved.

An optical assembly, an optical module and a related device, a light splitting unit in the optical assembly receives input signal light obtained by multiplexing signal light of N passive optical networks from a first direction, and demultiplexes the input signal light to obtain first signal light containing M wavelengths and second signal light containing N-M wavelengths, n is an integer greater than 1, M is an integer greater than or equal to 1, and M is less than or equal to N-1, various light beams with different wavelengths can be output at corresponding ports without an external device, an included angle between the first direction and a normal of the first light splitting unit is less than or equal to 45 degrees, and the first direction is greater than the first direction. Therefore, the light splitting unit of the optical assembly realizes light splitting based on a small angle, an extremely narrow light splitting path is established, the optical assembly can be directly applied to an optical module of an optical line terminal, and miniaturization of the optical line terminal is further realized.

The invention provides a signal processing device and an optical network, relates to the field of optical communication, and can reduce the transmission loss of the optical network. The signal processing device comprises a control circuit and a first optical distributor. The first optical distributor comprises a public port and a plurality of branch ports; wherein the common port of the first optical distributor is used for connecting a first optical line terminal, the first branch port of the plurality of branch ports of the first optical distributor is used for connecting a first optical network unit, and the second branch port of the plurality of branch ports of the first optical distributor is used for connecting a second optical network unit. The control circuit sends a first control signal to the first optical distributor so as to control the first optical distributor to communicate the public port with the first branch port; and the control circuit sends a second control signal to the first optical distributor so as to control the first optical distributor to communicate the public port with the second branch port. The embodiment of the invention is applied to the field of optical communication.

Techniques for evaluating performance of a Passive Optical Network (PON), include: obtaining a plurality of network performance metrics for an optical network terminal (ONT) for a customer in the PON, the PON including an optical line terminal (OLT) optically connected to a plurality of optical network terminals (ONTs) via a plurality of optical fibers; analyzing each of the plurality of network performance metrics to assign an individual quality metric to each of the plurality of network performance metrics; analyzing the individual quality metrics assigned to each of the plurality of network performance metrics to determine an overall quality metric for the ONT; and providing an indication of the overall quality metric for the ONT to at least one of a user interface or another computing device.

The invention relates to the technical field of access networks, in particular to an access network mode adjusting method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring real-time network traffic corresponding to an optical network unit (ONU) of an access network; according to the real-time network flow, determining a target operation mode corresponding to an optical line terminal (OLT) port and a channel control strategy of a passive optical network port in the ONU; and performing mode adjustment on the ONU according to the channel control strategy and the target operation mode. According to the method and the device, unnecessary energy consumption caused by a high-speed mode of the CNU in a low-load period of the network is avoided, and the purposes of remarkably reducing the energy consumption and improving the energy efficiency of an access network system are achieved.

The invention provides a signal processing method, an optical line terminal (OLT) and a computer readable storage medium, and the method comprises the steps: carrying a bandwidth allocation indication of an uplink frame of a first PON mode through a first downlink frame, carrying a bandwidth allocation indication of an uplink frame of a second PON mode through a second downlink frame, and controlling the time alignment of the first downlink frame and the second downlink frame so as to send the first downlink frame and the second downlink frame at the same sending time on the OL T side, the first downlink frame being transmitted in a first specified wavelength band, and the second downlink frame being transmitted in a second specified wavelength band. Since the sending time of the first downlink frame and the sending time of the second downlink frame are aligned, the ONU of the first PON mode and the ONU of the second PON mode can be ensured to correctly send the uplink frame through the third specified wave band according to the bandwidth allocation indication in the downlink frames, uplink time slot conflicts of the uplink frames of different PON modes transmitted in the same wave band are avoided, and the uplink frame transmission efficiency is improved. And uplink time division coexistence of different PON mode systems is realized.

The embodiment of the invention provides a data transmission method of a passive optical network (PON), a storage medium and an electronic device, and the method comprises the steps: detecting the service transmission condition of each subcarrier through an optical line terminal (OLT), and selecting the subcarrier as a windowed subcarrier; the OLT sends a downlink broadcast signal to each subcarrier so as to match a corresponding idle windowing subcarrier for a newly accessed optical network unit ONU; and the OLT receives uplink registration information of the ONU through the idle windowing subcarrier so as to carry out data transmission. Through application of the method and the device, the problems of high time delay and low transmission efficiency during TDM-PON data transmission in related technologies are solved, and the effects of reducing the TDM-PON data transmission time delay and improving the data transmission efficiency are achieved.

The invention provides a PONMAC (media access control layer) chip supporting resource redistribution, which comprises a CPU (central processing unit) and a logic unit, and is characterized in that the CPU is communicated with a management CPU in an optical line terminal / main equipment through a management network port and is used for managing the logic unit based on a system configuration file / a configuration file sent by the management CPU, and the logic unit is used for managing the PONMAC chip. The management comprises software and hardware resource configuration and service logic management of a passive optical network (PON) port; and an uplink port of the logic unit is connected with the switching chip, a downlink port of the logic unit is a PON port, and the logic unit is connected with the CPU unit through a bus and is used for carrying out service logic of data flow forwarding between the logic unit and the uplink switching port by utilizing software and hardware resources of the configured PON port according to the management of the CPU unit. By using the chip in FTTR networking, flexible adjustment, resource sharing and redistribution of related resources of a PON port can be realized, and the computing power of a CPU is fully utilized.

The invention relates to a flow data forwarding configuration method and device, an OLT, a computer readable storage medium and a computer program product. The method is used for an optical line terminal (OLT), and comprises the following steps: receiving a configuration instruction sent by a controller, the configuration instruction comprising a target virtual local area network (VLAN) identifier; and according to the configuration instruction, configuring the OLT, so that the OLT forwards target flow data sent by a second ONU to a target VLAN sub-interface corresponding to the target VLAN identifier in the first ONU. By adopting the method, the flexibility of traffic forwarding can be improved.

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.

The invention belongs to the technical field of FTTR enterprise networking, and particularly relates to a PON-based FTTR enterprise networking method and system, a dynamic networking decision model is constructed, an optical line terminal OLT obtains networking demand information, generates networking configuration information and issues the networking configuration information to an optical network unit ONU through the PON, the terminal configuration information is subjected to multi-protocol fusion processing coding, and the terminal configuration information is subjected to multi-protocol fusion processing coding. The method comprises the following steps: establishing trusted communication connection based on a block chain to communicate with an optical network unit ONU, and monitoring data of a region in real time; and uploading the collected monitoring data to an optical line terminal OLT, constructing an enterprise network virtual model by the optical line terminal OLT by using a digital twinning technology, performing network optimization simulation in the virtual model according to the monitoring data to obtain an optimal optimization strategy, and issuing the optimal optimization strategy to an optical network unit ONU for execution. Through intelligent dynamic networking, the flexibility and adaptability of the system are improved, the deployment efficiency is improved based on SDN configuration management, and the network security is enhanced through multi-protocol fusion and intelligent issuing, resource utilization optimization and block chain-based trusted communication.

The invention relates to the technical field of wireless communication, in particular to an optical fiber power supply wireless access controller and a communication method thereof, and the communication method comprises the following steps: connecting the optical fiber power supply wireless access controller with an optical fiber network, connecting a wireless access point with the controller in a wired or wireless mode, synchronously configuring network parameters on the controller, relevant parameters of the wireless access point are set; the controller detects the optical signal intensity through the optical fiber interface, identifies whether the optical signal is in a normal range, synchronously checks whether the optical fiber connection is correct and whether the optical module is normal if the signal intensity is insufficient, and carries out handshake with an optical line terminal in an optical fiber network and establishes a communication link if the check result is yes; according to the invention, by initializing configuration equipment parameters and a connection mode, coordination work of each part can be ensured, subsequent faults caused by confusion of configuration are reduced, a stable and high-speed data transmission channel is established and guaranteed based on an optical fiber link, and a large amount of data can be effectively borne by using a mature optical fiber protocol.

The invention relates to a vehicle-mounted passive optical network unit system and a communication method thereof. The vehicle-mounted passive optical network unit system comprises an optical line terminal; the plurality of optical network units receive downlink data; analyzing the downlink data to obtain an udp data packet; performing fcs verification on the instruction udp data packet; if the verification is successful, analyzing the instruction udp data packet to obtain instruction information; extracting the instruction information marked with the head and the tail, generating control information based on the instruction information marked with the head and the tail, issuing the control information to the vehicle-mounted terminal, and reading uplink data acquired by the vehicle-mounted terminal from the vehicle-mounted terminal; forming the uplink data into udp frames, and caching the processed uplink data; extracting the cached uplink data and transmitting the uplink data to the first interface; an optical splitter; a vehicle-mounted processor; and a vehicle-mounted terminal. The system has the advantages of low energy consumption, high broadband, low time delay, electromagnetic interference prevention, simple wiring, rapidness, stability, reliability and the like.

Techniques for augmenting repair of a network failure in a Passive Optical Network (PON) include receiving sensor data at a client device indicating a current environment that includes an optical network terminal (ONT) in a PON. The PON includes an optical line terminal (OLT) optically connected to the ONT via one or more optical fibers. The client device analyzes the current environment to detect a cause of a network failure corresponding to the ONT, and generates a set of instructions for repairing the ONT based on the detected cause of the network failure. Then the client device provides the set of instructions for a user to follow to repair the ONT. The set of instructions are provided as the user repairs the ONT.

The invention relates to a service processing method, device, system and equipment of a passive optical fiber network, a storage medium and a program product, and relates to the field of network technology and security technology. According to the application, the flexibility of service processing can be improved, and the service-level network elasticity capability which is flexible as required is provided. The method comprises the following steps: determining a second service channel corresponding to a second service category identifier and a target dynamic bandwidth allocation rate template corresponding to the second service channel; the second service type identifier corresponds to a second network service business added on the basis of the first network service business; the second service category identifier is different from a first service category identifier corresponding to the first network service business; the second service channel is different from the first service channel corresponding to the first service type identifier; the first service channel and the second service channel are service channels established between the optical network unit and the optical line terminal; and processing service data corresponding to the second service category identifier according to the second service channel and the target dynamic bandwidth allocation rate template.

Provided are a method and device for responding to a registration request. The method includes: an Alloc-ID configuration table sent by an Optical Line Terminal (OLT) is received, the Alloc-ID configuration table including corresponding relationships between Alloc-IDs and upstream rates; the Alloc-ID configuration table is parsed to determine a target Alloc-ID from the corresponding relationships between the Alloc-IDs and the upstream rates, the rates corresponding to the target Alloc-ID including the rate supported by an Optical Network Unit (ONU); and a registration request sent by the OLT is responded to based on the target Alloc-ID, the registration request carrying the target Alloc-ID.

A burst-mode optical receiver for an optical line terminal (OLT) of a passive optical network (PON) comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to a burst-mode optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a burst-mode TIA with a large dynamic range and provides for fast switching. The burst-mode optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The disclosed embodiments relate to an optical line terminal (OLT), an optical network unit (ONU), a communication method, a communication device, and a medium. In an example method, an optical line terminal determines its optical communication capability, the optical communication capability comprising at least one of: at least two uplink wavelength options supported by the OLT, a passive optical network (PON) mode associated with the OLT, and an uplink modulation format used by the OLT. And the optical line terminal also sends at least one piece of indication information for indicating the optical communication capability to the optical network unit. In this way, the optical line terminal can negotiate the optical communication capability with the optical network unit, and data transmission failure or performance reduction caused by incompatibility between devices is avoided.

A method of controlling transmission of an upstream packet traffic from a plurality of Optical Network Units to an Optical Line Terminal in a Passive Optical Network based fronthaul network. The Optical Network Units transmit packets in a time division multiplexed access scheme to the Optical Line Terminal and the method comprises obtaining mobile upstream scheduling information, scheduling the packet traffic from the plurality of Optical Network Units based on delay constraints of the PON-based front haul network and the obtained mobile upstream scheduling information. The method also comprises transmitting the scheduling of the packet traffic to the plurality of ONUs.

The invention provides an energy-saving method and device for an optical line terminal, equipment and a storage medium, relates to the technical field of communication, and is used for solving the problem of how to reduce energy consumption during data forwarding. The method comprises: acquiring a data type of target data to be forwarded, the target data to be forwarded being target data sent by an upper network to an optical network unit; and then, when the data type of the to-be-forwarded target data is a non-real-time interaction type requested by the optical network unit and the optical network unit is in a low-energy-consumption mode, stopping sending the to-be-forwarded target data to the optical network unit, and storing the to-be-forwarded target data in a database of the content distribution network.