296 results about "Optical network unit" patented technology

The present application provides a fault location and detection method, an optical line terminal, a passive optical network system and a medium. The method comprises: acquiring first communication feature data of a plurality of optical network units to be tested; on the basis of the first communication feature data, determining at least one first optical network unit among the plurality of optical network units that is suspected of having a logic channel occupation fault; issuing a preset message to a first logic channel corresponding to the first optical network unit, and on the basis of the response of other optical network units among the plurality of optical network units other than the first optical network unit to the preset message, determining a second optical network unit among the other optical network units, wherein the second optical network unit is an optical network unit among the other optical network units that interferes with occupation of the first logical channel of the first optical network unit, and the first logical channel is an interfered logical channel.

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 ONU (Optical Network Unit) management mode and port state switching method based on a hardware button, and relates to the technical field of communication, the method comprises the following steps: acquiring the triggering duration of an MOD (Modulation of Delay) button in ONU equipment, the triggering duration comprising a first triggering duration in a first time period and a second triggering duration in a second time period, the first time period is longer than the second time period; when the triggering duration of the MOD button is a first triggering duration, enabling the ONU equipment to execute a management mode switching operation, and performing switching between a remote management mode and a local management mode; and when the triggering duration of the MOD button is a second triggering duration, enabling the ONU equipment to execute switching between a port isolation state and a port intercommunication state in a local management mode, and directly writing a switching result into a nonvolatile memory. According to the invention, the reliability of the ONU equipment can be improved.

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.

The invention provides a passive optical network time-sensitive service transmission method and system, and the method comprises the steps: distributing a logic link identifier to at least one optical network unit, receiving the number of bytes to be distributed in a buffer region of each optical network unit, and building a polling table record with communication round-trip time; sending authorization information to each optical network unit; according to the communication round-trip time, determining a sending sequence of data to be forwarded uploaded by the optical network unit to the queuing scheduling module in each forwarding period; receiving data packets which are forwarded by each optical network unit through a queuing scheduling module and are obtained by packaging data to be forwarded and control information, receiving a plurality of data packets forwarded by each optical network unit by the queuing scheduling module, and storing the data packets in a transmission queue of a corresponding ordinal number according to the delay time slot number of the data packets, forwarding to the optical terminal equipment one by one according to ordinal numbers in a forwarding period; and updating the polling table according to the remaining byte number of the buffer area of the corresponding optical network unit recorded in the control information and the actual communication round-trip time.

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.

Disclosed in the embodiments of the present application are a bandwidth scheduling method, an electronic device and a computer-readable storage medium. The method comprises: dividing a target frame into multiple subframes on the basis of a preset bandwidth requirement, wherein each subframe corresponds to a subframe configuration table and a high-priority entry configuration table; on the basis of information collected from an optical network, calculating an allocable bandwidth for the target frame; on the basis of a high-priority entry configuration table and a subframe configuration table of a target subframe among the subframes, and the allocable bandwidth, determining bandwidth entry priorities of the target subframe; on the basis of the bandwidth entry priorities of the target subframe, sequentially transferring bandwidth entries of the target subframe to a preset bandwidth mapping table; and when the target subframe is the last subframe of the target frame, transmitting to an optical network unit all bandwidth entries of the target frame that are stored in the bandwidth mapping table.

The invention discloses an ONU authentication method, an ONU authentication device, optical communication equipment and an optical communication system, and belongs to the technical field of optical communication. The method comprises: an OLT receiving a first configuration information group and a second configuration information group, the first configuration information group being related to a first type of ONU, the second configuration information group being related to a second type of ONU, MAC protocols supported by the first type of ONU and the second type of ONU being different, the first configuration information group comprising first authentication information, and the second configuration information group comprising second authentication information; the second configuration information group comprises second authentication information, and the first authentication information is the same as the second authentication information; and authenticating the ONU according to the first configuration information group and the second configuration information group. According to the method, the ONU online configuration process can be simplified.

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 invention relates to the technical field of optical fiber communication, and discloses a fault positioning device and method for a passive optical network, the device mainly comprises an optical link terminal, an optical distribution network and an optical network unit, the optical link terminal comprises a communication light generation unit, a detection light generation unit, a first wavelength division multiplexer and a fault positioning unit, the optical distribution network comprises a second wavelength division multiplexer, a first optical splitter, a second optical splitter, a plurality of optical encoders and a plurality of third wavelength division multiplexers, the second wavelength division multiplexer is used for separating the mixed light into communication optical signals and detection optical signals, and the first optical splitter is used for distributing the communication optical signals; a plurality of output ends of the second optical splitter are respectively connected to input ends of a plurality of optical encoders, each optical encoder performs time domain encoding on the detection optical signal, and an output end of each optical encoder is connected with a second input end of the third wavelength division multiplexer. According to the invention, high-efficiency, accurate and intelligent positioning of the high-splitting-ratio passive optical network fault is realized.

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 invention provides an optical network unit staged anti-theft method and device and computer equipment, relates to the technical field of optical network unit anti-theft, and solves the problems that the existing optical network unit anti-theft technology is single in anti-theft mechanism, lagged in state judgment and low in operation and maintenance efficiency. The method comprises the following steps: periodically receiving a communication state from a server by utilizing an optical network unit; when the communication state is a failure state, starting a time lock for timing to obtain an accumulated time length; and implementing a staged anti-theft strategy according to the accumulated duration. According to the invention, firstly, the optical network unit is utilized to periodically detect the communication state with the server, and then the communication abnormal duration is accumulated through the time lock and the staged anti-theft strategy is executed according to the time, so that multi-strategy anti-theft, rapid state judgment and efficient operation and maintenance of the optical network unit are realized.

The application discloses a fault probability determination method and device, equipment and a readable storage medium, and relates to the technical field of power operation and maintenance. The method comprises the following steps: acquiring a set of power failure events to be analyzed in a target area; constructing a knowledge graph based on the set of power failure events to be analyzed; determining a first matrix corresponding to each optical network unit based on the connection between each optical network unit corresponding to each power failure event to be analyzed in the knowledge graph; performing aggregation processing on the first matrix to obtain a first vector corresponding to each optical network unit, wherein the first vector is obtained by aggregating spatial information and time information corresponding to each optical network unit; and inputting the first vector corresponding to each optical network unit into a first model to obtain a fault probability of the target area output by the first model. Through the method, whether a regional power interruption leads to a large number of power failure events can be accurately determined.

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.

The invention provides an optical transmitting assembly and an optical network unit, and belongs to the technical field of optical communication. The light emitting assembly comprises a laser and a photoelectric detector, the photoelectric detector is located in the opposite direction of the emitting direction of the laser, a transmission film arranged at the receiving end of the photoelectric detector corresponds to a transmission peak, the position of the transmission peak is the center wavelength of the working wavelength range, and the laser comprises a laser body and a resistor. The resistor is attached to the DBR area in the laser body. Therefore, when the wavelength of the optical signal output by the laser deviates from the central wavelength, the power of the optical signal detected by the photoelectric detector is gradually reduced, so that the resistor attached to the DBR area in the laser body can be heated based on the power, the refractive index of the DBR area is changed, and the DBR area can output the optical signal close to the central wavelength. Therefore, under the condition that TEC does not exist, optical signals with high wavelength precision can be output.

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).

A kind of GPON hardware system based on Zynq architecture, including Zynq framework SoC chip, optical line terminal optical module and optical network unit optical module, Zynq framework SoC chip includes processing system and programmable logic part, processing system and programmable logic part communicate by AXI-lite protocol.The GPON hardware system of flexible, scalable, easy maintenance network topology of P2P (point to point) or P2MP (point to multipoint) provided by the application is composed of Zynq architecture Soc chip and OLT (optical line terminal) optical module, ONU (optical network unit) optical module etc., the number of each node of system and topology can be flexibly set, and each node can be managed, configured and maintained remotely by SoC development platform based on Zynq architecture, and the hardware system built by it has the advantages of simple system, controllable cost, management configuration, simple upgrade and maintenance, high safety and reliability, no backdoor etc.

Examples embodiments relate to passive optical networks (PONs) and in particular to a controller and associated method for an optical termination device. The controller may for example comprise means for determining, based on one or more inputs, at least one of first and second passive optical network, PON, technologies to use for transmitting and / or receiving data at a time instance between an optical line terminal, OLT, and at least one optical network unit, ONU, over an optical distribution network, ODN. the OLT and the at least one ONU may be configured to support the first and second PON technologies. The controller may also comprise means for causing the data to be transmitted and / or received at the time.

The invention relates to the technical field of wavelength division multiplexing passive optical network transmission optimization, in particular to a wavelength division multiplexing passive optical network transmission optimization method and system. Comprising the following steps: S1, constructing a network architecture through a plurality of pairs of wavelength stacked optical modules, dividing optical network units in the network architecture, and receiving and sending optical signals of a terminal through the optical network units; through the ONU architecture design of dense wavelength division multiplexing and transmitting-receiving separation, the capacity of a wavelength resource pool is further expanded, and in combination with the flexible branching ratio of 1: 8 to 1: 256 and the compatibility of single-mode and multi-mode optical fibers, it is ensured that the system can stably support 100 Gb / s total rate transmission under the scenes of different scales and different transmission distances; the problem that the wavelength resource utilization rate is low in a traditional static allocation mode is thoroughly solved.

The invention relates to a network control method and device, computer equipment, a computer readable storage medium and a computer program product, and can be applied to the technical field of communication. The method comprises the following steps: generating a to-be-authenticated identifier of an optical network unit according to to-be-authenticated information of the to-be-authenticated optical network unit; sending the to-be-authenticated identifier to an authentication platform, so that the authentication platform performs authentication processing on the to-be-authenticated identifier to obtain an authentication result of the to-be-authenticated identifier; determining network channel control information of the optical network unit according to an authentication result returned by the authentication platform; and performing corresponding control processing on the network channel of the optical network unit according to the network channel control information. By adopting the method, the network control efficiency of the optical network unit can be improved.

A roaming method and apparatus, relating to the field of communication technology, are provided for providing a processing flow for master-slave optical network units. The method includes: a master optical network unit (MFU) sending a roaming preprocessing message to a target SFU, the roaming preprocessing message instructing the target SFU to initiate roaming preparation for the site; and the MFU receiving a roaming preprocessing feedback message from the target SFU, the roaming preprocessing feedback message indicating whether the roaming preparation for the site was successful.

The invention provides a time delay determination method and device and related equipment, and relates to the technical field of communication. The method comprises the steps that a control message is sent to an access concentrator, and the control message comprises an access section time delay request identifier; receiving a response message fed back by the access concentrator, the response message comprising a first time delay between the optical network unit and the access concentrator; and determining a second time delay between the terminal and the optical network unit based on the first time delay. According to the embodiment of the invention, through the technical means, the problem that the time delay between the terminal and the optical network unit cannot be determined in related technologies is solved.

Disclosed in the present application are bandwidth resource allocation methods, an apparatus, a terminal, an optical network unit, and a storage medium. A bandwidth resource allocation method of the present application comprises: acquiring a bandwidth resource of a downlink optical port of an optical network unit, acquiring wireless bandwidth resources amongst optical routers, and acquiring a bandwidth resource demand for east-west communication (S201); and, according to gaps between the bandwidth resource of the downlink optical port of the optical network unit and said bandwidth resource demand and between the wireless bandwidth resources east-west amongst the optical routers and said bandwidth resource demand, dynamically allocating a target bandwidth resource for east-west communication (S202).

The application provides a network fault notification method and device, electronic equipment and storage medium, and relates to the technical field of communication. The method comprises the following steps: determining target alarm information based on ONU offline alarm information, OLT PON port no light alarm information and OLT device out of service alarm information. The ONU offline alarm information is alarm information of an optical network unit (ONU) offline. The OLT PON port no light alarm information is alarm information of a PON interface of an optical line terminal (OLT) not receiving an optical signal. The OLT device out of service alarm information is alarm information of an optical line terminal (OLT) device exiting service. The target alarm information is alarm information that needs to notify corresponding user fault information. Based on the target alarm information, a notification is sent to the corresponding user. The present scheme can actively notify the user of network fault information in a timely manner, thereby improving the user experience and reducing user complaints.

The application relates to an optical network unit upgrading method, a network device and a computer readable storage medium. In cooperation with a compiling server, the optical network unit upgrading method provides different upgrading version files for different types of ONUs according to the latest software code of the ONUs by the compiling server; the OLT determines which upgrading version file is used by each ONU for upgrading, which is equivalent to setting an upgrading version file screening mechanism for the ONU on the OLT side, avoids the case that the ONU is mis-upgraded with an upgrading version file that is not supported by the ONU, and improves the success rate of ONU upgrading. Meanwhile, the OLT side can simultaneously store at least two upgrading version files from the compiling server, compared with the related art, the ONU upgrading method provided by the application can simultaneously upgrade different types of ONUs on the OLT, improves the upgrading efficiency, and reduces the time cost of ONU upgrading.