23 results about "Passive optical network" patented technology

A method for validating service continuity of deployed fiber serving terminals in a passive optical network includes broadcasting, from a central office of a passive optical network, a beacon signal to a plurality of beacon responders, wherein each beacon responder of the plurality of beacon responders is connected to a respective fiber serving terminal of a plurality of fiber serving terminals of the passive optical network, changing a counter in response to each response message that is received from the plurality of beacon responders in response to the beacon signal, and generating a report indicating which fiber serving terminals of the plurality of fiber serving terminals are functioning properly and which fiber serving terminals of the plurality of fiber serving terminals are not functioning properly, based on whether a count of the counter is equal to an expected number of responses, after an expiration of a predefined period of time.

1. Name of the product in this design: Optical Communication Router (V2904QT-Z). 2. Application of this design: It is used as a wall-mountable and rollable fibrous plastic housing for EPON and GPON passive optical network terminal equipment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The embodiment of the application provides a network element configuration method, system and device based on an automatic opening system and a storage medium, belongs to the technical field of passive optical networks, and automatically acquires an IP address through a DHCP protocol and automatically completes the configuration of a network element according to preset configuration information, thereby reducing the technical requirements of network element opening on construction personnel, simplifying the opening process and improving the opening efficiency. The automatic opening system comprises a network element, a DHCP server, an intermediate server, a router and an EMS server, and the network element is in communication connection with the DHCP server, the intermediate server and the EMS server through the router. The method comprises the following steps: acquiring an IP address and address information of the intermediate server from the DHCP server through the DHCP protocol, wherein the IP address is used for the management of the network element by the EMS server; acquiring preset configuration information from the intermediate server based on the address information; adding the EMS server to a routing list of the network element according to the EMS server information acquired from the configuration information; and completing the configuration of the network element according to the configuration information.

The embodiment of the application provides a control system and a fault diagnosis isolation method of a passive optical network. The control system provided by the embodiment of the application comprises a diagnosis isolation unit and a working card; the working card is used for connecting an optical module, and the diagnosis isolation unit is used for connecting the optical module; wherein the diagnosis isolation unit is configured to: acquire running data of the optical module; the running data comprises running state data and / or running environment data of the optical module; according to the running data of the optical module, the working state of the optical module is determined; if the optical module is in a fault state, the optical module is isolated. The control system directly connects the diagnosis isolation unit of the optical module, acquires the running data of the optical module, judges the fault state in time and completes fault isolation, omits the link of multi-stage information transmission, can realize rapid fault disposal, avoids that the fault is expanded to cause the collapse of the whole passive optical network, and meets the core demand of rapid positioning and accurate isolation of network faults in the industrial control scene.

Embodiments of the present application provide a detection method of a passive optical network, a storage medium, an electronic device and a computer program product. The method comprises: controlling an optical time domain reflectometer to detect a plurality of PON ports in the passive optical network (PON) using different wavelengths to obtain detection data of a plurality of reflection events; and determining a detection result of the PON according to the detection data of the plurality of reflection events and data of a reference reflection event stored in advance. According to the embodiments of the present application, all reflection events on the optical path do not need to be detected, but only the reflection events of the specified wavelength in the optical path of the PON port are detected, thereby improving the efficiency of the detection method of the PON network. In addition, the detection result of the PON can be determined by comparing the detection data of the plurality of reflection events with the data of the reference reflection event stored in advance, the fault condition can be analyzed, and the accuracy of the detection method of the PON network is improved. Therefore, the problem of low efficiency and accuracy of the detection method of the PON network can be solved.

The invention provides a communication method, system and device supporting passive optical networks of different standards and a storage medium. The method applied to a first communication device comprises the following steps: determining an uplink bandwidth allocation result of a second communication device in passive optical networks of different standards; wherein the uplink bandwidth allocation results are not overlapped with each other; and sending the uplink bandwidth allocation result to a second communication device of the corresponding system through a downlink channel of the corresponding system.

An example method includes dividing an optical communication channel to separate an upstream path and a downstream path, generating an interference signal to emulate rogue transmission behavior on the upstream path by connecting the downstream path to the upstream path, and undividing the optical communication channel, after generating the interference signal, by recombining the downstream path and the upstream path.

A method and a device is provided for managing an operating fault in a laser diode of an optical interface of user equipment of the ONU type. The user equipment is connected by an optical access network of the passive optical network PON type to line termination equipment of the OLT type. The user equipment is enabled to send an optical signal during a time slot allocated to the user equipment in accordance with a time-division multiple access principle. The laser diode is checked as to whether it is transmitting an optical signal outside the allocated time slot and, if so, a message to the line termination equipment is transferred if the fault is detected, deactivation of the laser diode is demanded, and one or more procedures for attempting to correct the fault are implemented.

The application discloses a kind of mixing light module and passive optical network system, mixing light module includes shell assembly, light emitting receiving component being arranged in shell assembly, light emitting receiving component is equipped with optical port and lens, and is integrated with emitting unit and receiving unit.Emitting unit includes multiple laser assembly and wave combining component, and multiple optical signals are output from optical port after wave combining.Receiving unit includes wave separating optical separating component, first detection component and second detection component, wave separating optical separating component receives mixed frequency optical signal input from optical port, first, receive waveband and emission waveband are separated, then the optical signal of receive waveband is divided into first light beam and second light beam according to optical power, and first light beam and second light beam are respectively incident to two detection components in opposite directions.The application solves the technical problem that multiple system PON uplink signal cannot be independently separated by wavelength selective filter due to wavelength overlap by receiving mode of first wave separation and then light separation.

The application discloses a low-cost PON link SOA bias current driving method and belongs to the technical field of optical communication. By introducing a current distribution network composed of an adjustable current mirror, a local energy storage capacitor pre-charging mechanism and a central cooperative controller, simultaneous, independent and stable biasing of a laser and a semiconductor optical amplifier during PON uplink burst transmission is realized. The central cooperative controller configures the current mirror ratio in advance and pre-charges the energy storage capacitor according to the uplink burst enable signal before the burst starts, maintains simultaneous power supply during the burst, and cuts off the power supply after the burst to reduce power consumption. Compared with the prior art, the application completely avoids the use of an external independent current source chip, significantly reduces the bill of materials cost and system complexity, while ensuring the burst response speed, biasing accuracy and nonlinear distortion suppression effect, and can be widely applied to a passive optical network system with high link budget.

The embodiments of the present disclosure provide a passive optical network device coexistence method and a passive optical network system. The method comprises: determining device capabilities of a plurality of devices in a passive optical network, wherein the plurality of devices comprise: a primary device, a first secondary device, and a second secondary device, and a data transmission rate of the first secondary device is different from a data transmission rate of the second secondary device; determining a coexistence mode of the plurality of devices according to the device capabilities of the plurality of devices; and configuring the first secondary device and the second secondary device according to the coexistence mode.

This application relates to the field of optical fiber communication technology, specifically disclosing a single-fiber bidirectional wavelength division multiplexing (WDM) transmission method for passive optical networks. After protocol splitting and service level baseline parameter extraction of the multi-protocol data stream on the access side, it performs wavelength adaptive pre-distortion conversion on each channel based on the compensation vector returned from the receiver. The pre-compensated optical signal is coupled and superimposed with the out-of-band pilot signal of the non-service band to form a telemetry-carrying composite optical stream. After transmission through a dual-redundant optical fiber network, the sampling optical stream is non-intrusively intercepted at the receiver to complete single-channel state feature extraction. Finally, the service signal is demodulated and output, and the compensation vector is calculated based on the optical fiber state matrix and returned to the transmitter via a closed-loop reverse optical path. This scheme utilizes out-of-band telemetry to reduce the monitoring granularity from the total power level to the single wavelength level, and through continuous iterative closed-loop pre-compensation adaptive repair of channel degradation at both the transmitting and receiving ends, it effectively overcomes the residual error bottleneck and ensures reliable transmission of power grid protection services.

The application discloses a PON optical layer physical signature authentication method, which utilizes the spectrum characteristic curve of a wavelength division multiplexing (WDM) optical filter in a passive optical network (PON) device to form an optical fingerprint according to the different factors affecting the WDM filter during production and assembly, so that each ONU is characterized by different unique ONU characteristics due to different factors of each built-in WDM filter; and the PON optical layer physical signature and authentication are performed according to the obtained optical fingerprint, so that the access security of the PON is realized. Compared with the password authentication mode, the fingerprint feature of the application is not easy to obtain through monitoring or attack; and the fingerprint feature is extracted through a channel noise model reconstruction method, so that the application has simple hardware, low cost and easy realization. The application further provides an optical network device for realizing the PON optical layer physical signature authentication method.

The present application relates to a service configuration method and apparatus, and a computer device and a storage medium. The method comprises: on the basis of the number of service bursts and a single burst slot that correspond to a target service requirement, determining an initial expansion coefficient; when it is determined, on the basis of the initial expansion coefficient, that the target service requirement cannot fully occupy a unit period of a passive optical network channel, obtaining a target expansion coefficient for performing slot expansion on the single burst slot; and on the basis of the target expansion coefficient, performing service configuration on the target service requirement.

The application provides a data forwarding method based on a vehicle-mounted passive optical network and related devices, and relates to the technical field of vehicle communication. In the data forwarding method, a first ONU gateway aggregates and encapsulates multiple frames of received messages into the same uplink GEM frame, so that the multiple frames of messages share the same GEM frame header, the frame header overhead in the low-speed data transmission process is effectively reduced, and the bandwidth utilization of the vehicle-mounted PON network is improved. Meanwhile, the first ONU gateway directly completes message grouping, uplink GEM frame encapsulation and uplink burst frame coding, and sends the uplink burst frame to an OLT, so that the time delay and system resource consumption are reduced, the high real-time requirement of low-speed data (such as sensors and control signaling) in the vehicle-mounted scene is adapted, and the efficient and low-time-delay bearing of the low-speed data on the vehicle-mounted PON network is realized.

An ONU includes: a receiver for receiving a discovery grant message from an OLT, the discovery grant message including a channel assignment field and a discovery information field, the channel assignment field indicating transmission characteristics of a plurality of channels, the discovery information field indicating 25G uplink capability and a 25G discovery window; and a processor coupled to the receiver and for processing the discovery grant message. A method implemented in an ONU includes: generating a registration request message including a destination address field, a source address field, a length / type field, an opcode field, and a discovery information field, the discovery information field indicating 25G uplink capability and a 25G registration attempt; and transmitting the registration request message to the OLT.

Provided in the present application are a communication method and system supporting passive optical networks of different standards, and a device and a storage medium. The method, which is applied to a first communication device, comprises: determining uplink bandwidth allocation results of second communication devices in passive optical networks of different standards, wherein a plurality of uplink bandwidth allocation results do not overlap each other (110); and by means of downlink channels of the corresponding standards, sending the uplink bandwidth allocation results to the second communication devices of corresponding standards (120).

Provided in the present application are a resource allocation method and system for a passive optical network (PON) system. The resource allocation method comprises: an MFU acquiring target information, which is associated with a radio requirement corresponding to a first SFU and a radio requirement corresponding to a second SFU, wherein each radio requirement corresponds to frequency width requirements of N terminal devices, and the radio requirement corresponding to the first SFU is greater than the radio requirement corresponding to the second SFU; and the MFU sending radio allocation information, which is used for indicating a first frequency width allocated for the first SFU and a second frequency width allocated for the second SFU, wherein the first frequency width is greater than the second frequency width. In the method, a radio resource requirement of a connected user equipment is acquired, and a frequency width of an SFU device is actively regulated and controlled on the basis of the radio resource requirement, such that it is ensured that a frequency width that an MFU allocates for an SFU suits a frequency width required by a wireless terminal device, thereby increasing the utilization rate of radio resources.