309 results about "Optical line termination" patented technology

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 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.

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.

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 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.

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.

The invention provides an optical fiber borne radio frequency signal ROF transmission system and transmission method, the system comprises a wireless coverage subsystem, a passive optical network PON broadband access subsystem and a first multiplexer / demultiplexer, the wireless coverage subsystem comprises a base station, at least one remote radio frequency coverage point RFP and UE, and the first multiplexer / demultiplexer comprises at least one radio frequency signal. The PON broadband access subsystem comprises an optical line terminal (OLT) device, a passive optical distribution network (ODN) and at least one optical network unit (ONU) device, the base station comprises a first ROF module, and the RFP comprises a second multiplexer / demultiplexer and a second ROF module. Through the ROF transmission system and the ROF transmission method, a passive optical network (PON) used by a home broadband can be used for forward transmission of radio frequency signals, the deployment cost of an indoor distribution system is greatly reduced, the deployed ODN is effectively utilized, and meanwhile, the technical prejudice that only point-to-point architecture deployment can be adopted on the same wavelength in the ROF technology is overcome.

In accordance with an embodiment, a method includes determining, by a standby optical line terminal (OLT), that a primary OLT has stopped sending a downlink optical signal over a first management channel; sending, by the standby OLT, a ranging request to a first optical network unit (ONU), over a second management channel, where the first ONU is one of the at least one ONU, and the second management channel is a channel between the standby OLT and the at least one ONU; and obtaining, by the standby OLT, a distance parameter between the first ONU and the standby OLT based on a ranging response received from the first ONU over the second management channel.

Communication systems and methods using a hybrid-switch dynamic bandwidth allocation (DBA) are provided. A predetermined switch threshold is calculated for each data subcarrier of a downstream optical signal. The downstream optical signal is transmitted by an optical line terminal (OLT) to a plurality of optical network units (ONUs) disposed remotely from the OLT. A status report is received from each ONU of the plurality of ONUs and a current load is calculated for each data subcarrier of the one or more data subcarriers based on the status report from each ONU. The current load is determined to meet or not meet the predetermined switch threshold. A first DBA algorithm is selected when the current load does not meet the predetermined switch threshold and a second DBA algorithm is selected when the current load meets the predetermined switch threshold. The selected DBA algorithm is then executed.

A system for activating multi-rate optical network units (ONUs) includes an optical network having an optical line terminal (OLT) optically coupled to a plurality of ONUs, including one or more multi-rate ONUs configured to support multiple upstream rates. During discovery when other ONUs are permitted to transmit in the same quiet window, a multi-rate ONU that supports a higher rate is instead configured to send a discovery response at a sufficiently low rate so as not to require training of an equalizer, thereby allowing for a short preamble for the discovery response. Thereafter, during a quiet window for ranging when only the multi-rate ONU will be transmitting to prevent data collisions, the multi-rate ONU is transitioned to a higher rate and transmits a message with a sufficiently long preamble to train an equalizer at the OLT.

The application provides a window drift processing method and an optical line terminal, an optical network unit and a computer readable storage medium. The window drift processing method applied to the OLT comprises the following steps: in the case that a first burst signal corresponding to an ONU is received, first information is determined according to the first burst signal, the first information is used for representing a window drift condition of the first burst signal; a drift domain is constructed according to the first information and the first burst signal; a GTC frame is transmitted to the ONU, so that the ONU corrects the window drift condition of the first burst signal according to the GTC frame, and the GTC frame is filled with the drift domain. In the embodiment of the application, the deviation can be quickly and accurately corrected directly according to the GTC frame, so that the efficiency of correcting the window drift of the burst signal is improved, and the stability of the passive optical fiber network is improved.

The invention discloses an optical network terminal detection method, a detection device and an optical line terminal, and belongs to the technical field of communication. The method is applied to a detection device, the detection device is connected with a first optical network terminal (ONT) through a first channel and connected with a second ONT through a second channel, the wavelength range received by the first channel is a first wavelength range, and the wavelength ranges received by the second channel are a second wavelength range and a third wavelength range. The first wavelength range is located between the second wavelength range and the third wavelength range, and the method comprises the following steps: under the condition that bandwidth authorization is not carried out on the first ONT, authorizing a first bandwidth greater than a first bandwidth threshold to a target ONT; and detecting a signal of the target ONT in the first channel to obtain a signal detection result, thereby determining whether the target ONT is an abnormal ONT. According to the invention, the detection of the abnormal ONT is realized through cross-channel signal detection, the detection accuracy is relatively high, and the efficiency is also relatively high.

Provided is a passive optical network uplink signal processing method, comprising: an optical line terminal (OLT) collecting a target uplink signal from a target ONU on an uplink bandwidth pre-allocated to the target ONU to obtain feature data of the target uplink signal, determining identity information of the target ONU according to the uplink bandwidth, and sending the determined identity information to the target ONU; and determining a processing mode of the feature data. Through the embodiment of the invention, the identity of the ONU can be decided according to the characteristic data of the uplink signal, the identity of the ONU can be effectively and reliably prevented from being falsely used, and the problem that the service of the normal ONU is stolen and enjoyed due to the fact that the SN of the normal ONU is counterfeited in the related technology is solved.

The present disclosure provides a configuration method, including: determining, according to OAN service types, information of at least one OAN slice for transmitting an OAN service flow of each OAN service type; determining, according to OTN service types, information of at least one OTN slice for transmitting an OTN service flow of each OTN service type; and establishing, according to a correspondence relationship of the OAN service types and the OTN service types, a mapping relationship between the at least one OAN slice and the at least one OTN slice to obtain information of at least one end-to-end slice, where each end-to-end slice includes a set of OAN slice and OTN slice having a mapping relationship. The present disclosure further provides a data transmission method, a controller, an optical line terminal, and a computer-readable storage medium.

A scheduling method, an OLT, an ONU, a system, a storage medium, a vehicle, and a program product. The method can be applied to an optical communication system. The optical communication system comprises an optical line terminal (OLT) and at least one optical network unit (ONU), wherein the at least one optical network unit (ONU) comprises a first ONU; the OLT can determine, on the basis of feature information of a deterministic service, a configuration parameter of a transmission window of a first packet of the deterministic service; and the OLT can also send scheduling information to the first ONU, the scheduling information indicating the transmission of the configuration parameter of the transmission window.

Embodiments of the present application provide a response method and device for a registration request, the method comprising: receiving an allocation identifier (Alloc-ID) configuration table sent by an optical line terminal (OLT), wherein the Alloc-ID configuration table comprises a correspondence between an Alloc-ID and an upstream rate; parsing the Alloc-ID configuration table to determine a target Alloc-ID from the correspondence between the Alloc-ID and the upstream rate, wherein the rate corresponding to the target Alloc-ID comprises a rate supported by an optical network unit (ONU); and responding to a registration request sent by the OLT based on the target Alloc-ID, wherein the registration request carries the target Alloc-ID. Through the present application, the problem of low T-CONT use efficiency in the related art is solved, and the effect of improving the T-CONT use efficiency is achieved.

The utility model relates to the technical field of optical fiber communication, specifically relates to a device that improves passive optical network link connection compatibility, the passive optical network includes an optical line terminal, a beam splitter and a plurality of optical network units, the input end of beam splitter is connected optical line terminal through first optical fiber, and the output end of beam splitter is connected a plurality of optical network units through second optical fiber, the device includes: ONU optical module is connected with the optical network unit, is used for obtaining the original monitoring quantity of optical link received by optical network unit, and after calculating the attenuation of optical link received by ONU and power demand value, the closest optical power is outputted, OLT optical module is connected with the optical optical line terminal, is used for obtaining the original monitoring quantity of optical link received by optical line terminal, and after calculating the attenuation of optical link received by OLT and power demand value, the closest optical power is outputted. The material consumption is reduced, and the flexibility and stability of system deployment are improved, thereby satisfying the increasing broadband access demand, and improving user experience.

The application discloses a service configuration method and device of a passive optical network equipment and a storage medium, wherein the method comprises the following steps: when it is detected that a first optical network terminal completes registration, if a first configuration issuing state is an issued state and configuration parameters of the first optical network terminal need to be upgraded, an optical line terminal determines a management mode corresponding to the first optical network terminal based on the first configuration issuing state; the optical line terminal determines a first target configuration file corresponding to the first optical network terminal based on the management mode, the configuration parameters and a configuration information table; and the optical line terminal issues the first target configuration file to the first optical network terminal, wherein the first optical network terminal performs corresponding parameter configuration operation based on the configuration file. The application can perform parameter configuration on the configuration file issued to the optical network terminal in the issued state and needing to be upgraded, improves the resource utilization rate of the passive optical network equipment, and simultaneously can also update the default configuration in the optical network terminal.

The present embodiments are applied to the technical field of optical communications, and provide an optical line terminal device, an optical network terminal device, and a detection method. The optical line terminal device is configured to: receive optical signals sent by different optical network terminal devices in different time slots, wherein each optical signal carries a characteristic signal of a corresponding optical network terminal device, different optical network terminal devices correspond to different characteristic signals, and each optical network terminal device has a preset time slot; and when a target optical signal is received in a time slot outside a target time slot, determine a target optical network terminal device on the basis of the characteristic signal carried on the target optical signal, wherein the target time slot is a preset time slot corresponding to the target optical signal. The optical line terminal device provided in the present embodiments can detect and delimit optical network terminal devices exhibiting rogue behavior, thereby achieving the objective of improving the communication quality and stability of optical communication systems.

This semiconductor light-receiving element (100) is provided with: an n-type InP substrate (1); an n-type semiconductor layer (2) formed on the n-type InP substrate (1); a multiplication layer (3) which is formed on the n-type semiconductor layer (2), has a layer thickness of 40 nm or more and 170 nm or less, and comprises an InAlAs digital alloy structure in which InAs layers and AlAs layers are alternately laminated; a p-type electric field relaxation layer (4) formed on the multiplication layer (3) and comprising InP or InAlAs; and an InGaAs light absorption layer (5) formed on the p-type electric field relaxation layer (4).

The invention relates to the technical field of optical fiber access networks, in particular to a data forwarding method based on an outer layer VLAN label, network equipment and a storage medium, the method is applied to the network equipment comprising an optical line terminal OLT chip and a switching chip, and the method comprises the following steps: in an uplink direction, obtaining a first GEMPORT ID corresponding to a data stream from an optical network unit ONU through the OLT chip; based on the first GEMPORT ID, generating a first outer layer VLAN label of the uplink data packet; combining the uplink data packet with the first outer-layer VLAN label to form a first double-layer VLAN message; the first double-layer VLAN message is sent to a switching chip; the method comprises the steps of receiving a first double-layer VLAN message through a switching chip, analyzing a first outer-layer VLAN label in the first double-layer VLAN message to obtain a first GEMPORT ID, and creating table items in an initial L2 forwarding table based on the first GEMPORT ID and a source MAC address of the first double-layer VLAN message to obtain an updated L2 forwarding table. According to the invention, the forwarding table pressure of the OLT chip is reduced by using the L2 learning mechanism of the switching chip.

A method for equalization in an access network of passive optical network type. The method includes, for a given optical distribution network connecting a given input port of an optical line termination to a given plurality of optical network units: for at least one of the optical network units of the given plurality, obtaining a distance between the optical line termination and the optical network unit; determining a representative distance associated with the given optical distribution network, according to the one or more distances obtained; determining at least one equalization parameter, according to the representative distance; and equalizing transmission channels within the given optical distribution network, according to the at least one equalization parameter, each of the transmission channels connecting the given port of the optical line termination to one of the optical network units of the given plurality.

This optical modulator-integrated semiconductor laser (500) is provided with a semiconductor laser unit (101) formed on a semi-insulating substrate (1), a first connection waveguide unit (102), a first EA modulator unit (103), a second connection waveguide unit (104), a second EA modulator unit (105), and a first EA modulator n-type electrode (31) provided in the first EA modulator unit (103) and a second EA modulator unit (105) provided in the second EA modulator unit (105). And a first common electrode (45) electrically connected to the second EA modulator p-type electrode (42).

This application provides a dynamic bandwidth allocation method, apparatus, and optical line terminal (OLT), relating to the field of passive optical network (PON) technology. The method is applied to an OLT in a PON. The OLT has multiple token bucket queues, each with a priority level. Each token bucket in each queue corresponds to a TCONT (Trusted Token Terminal). The number of tokens in each token bucket indicates the configured bandwidth. The method includes: traversing multiple token bucket queues in descending order of priority during each bandwidth allocation cycle; allocating bandwidth authorization values ​​to the TCONT corresponding to each token bucket based on the number of tokens in each queue, until the remaining bandwidth is empty, or the traversal of multiple token bucket queues is complete; generating a bandwidth mapping using the bandwidth authorization values ​​allocated to each TCONT; and distributing the bandwidth mapping to the ONUs (Optical Units) in the PON. This scheme improves the fairness of dynamic bandwidth allocation.

A coherent transmitter (100, 200) for use in a time division multiple access (TDMA) system is operated in multiple states to enable coherent burst transmission. In an OFF state, the transmitter (100, 200) generates a dummy laser output (fd) from either a dummy laser (102) or an active laser (52) tuned to a dummy frequency different from an active frequency (fa), thereby maintaining thermal and bias stability without adding excess power on an upstream channel (22). In an ON state, the active laser (52) produces an active laser output (fa) that is modulated by a quad-parallel Mach-Zehnder (QPMZ) modulator (60) to transmit data. A thermoelectric cooler (TEC) (58) stabilizes laser temperatures, and a variable optical attenuator (VOA) (54) controls output power. The transmitter (100, 200) is suitable for an optical network unit (ONU) (14) in a passive optical network (PON) (10) communicating with an optical line terminal (OLT) (12).

Techniques for communicating between client devices connected to components in a Passive Optical Network (PON) include establishing a communication session with an optical network terminal (ONT) in a PON via a short-range communication link. The PON includes an optical line terminal (OLT) optically connected to the ONT via one or more optical fibers. Furthermore, the techniques include presenting an indication of a second client device communicating with a component in the PON optically coupled to the ONT, where the ONT is downstream of the component. Additionally, the techniques include establishing a messaging session between the first client device and the second client device, and receiving a communication from the second client device indicating a repair status of the component in the PON, where repair of the ONT depends on the repair status of the component.