237 results about "Passive optical network" patented technology

The invention provides a vehicle-mounted passive optical network area gateway and a protocol conversion method. The gateway comprises an interface module which comprises a plurality of communication interfaces, wherein the communication interfaces are used for receiving messages of a low-speed network protocol; the data processing module adopts an FPGA (Field Programmable Gate Array) core board and is used for receiving a message, extracting effective information from the message, packaging the effective information to obtain an Ethernet protocol frame and converting the Ethernet protocol frame into an SDU (Service Data Unit); and the ONU optical module is used for performing data link layer processing on the SDU to obtain an uplink FS burst frame, and performing physical layer processing on the uplink FS burst frame to obtain a burst mode optical signal frame. The gateway can realize data access of multiple paths of CAN nodes, LIN nodes and vehicle-mounted Ethernet nodes at the same time, meets the communication protocol conversion function of low-speed nodes in each region in a real vehicle environment, and is integrated into a whole vehicle all-optical backbone network. The method is used for converting data complying with a low-speed network protocol into data complying with an XGS-PON protocol.

The invention discloses a smart campus Internet of Things multi-service collaborative scheduling control system based on an all-optical network, and relates to the technical field of Internet of Things, and the system comprises an Internet of Things digital platform which is in communication connection with the following modules: an all-optical network infrastructure module which is used for constructing an optical fiber backbone network in a campus, and each subsystem in the campus is accessed. The reliability and stability of the campus Internet of Things are enhanced by constructing all-optical network infrastructure, the subsystems are directly connected through optical fibers by adopting the passive optical network technology, and the use of active equipment is reduced, so that the equipment failure rate and the maintenance cost are reduced, optical wavelength resources are dynamically allocated by utilizing a software defined network controller, and the reliability and the stability of the campus Internet of Things are improved. The transmission path is adjusted according to the service priority, efficient operation of key services is ensured, network stability is improved, high speed and safety of data transmission are guaranteed, and solid network support is provided for various intelligent applications in the campus.

The invention relates to the technical field of passive optical networks, and discloses a dual-core optical fiber link loss self-repairing and redundancy switching method, which comprises the following steps of: establishing a resonance transmission state sensitive to physical disturbance; when the state is damaged due to disturbance, forced reconstruction and secondary confirmation are executed firstly instead of being switched immediately so as to distinguish transient impact and a hard fault, and the state is physically switched to a standby link only after the hard fault is confirmed. A traditional indirect mode depending on external measurement and threshold judgment is changed, and judgment delay and response delay are avoided; a secondary confirmation mechanism effectively avoids unnecessary switching caused by transient disturbance, and the operation stability of the system in a complex environment is improved.

The invention provides a communication method, a communication device and a PON (Passive Optical Network) system, which can solve the problem of SN (Serial Number) conflict in a PON network and improve the system performance of the PON network. The method comprises: an OLT device receives a first SN from a first ONU device in a first time window, allocates a first ONU identifier to the first ONU device, and then broadcasts and sends first indication information and the first ONU identifier, the first indication information being used for indicating that the OLT device successfully allocates the first ONU identifier to the first ONU device. Thereafter, the OLT device receives a second SN from the second ONU device at a second time window, the second SN being the same as the first SN. And the OLT device determines whether to allocate a second ONU identifier to the second ONU device based on the authentication result of the first ONU device.

The invention discloses a hot patch management method in a passive optical network system, a storage medium and an electronic device, in a Linux system, a patch management process running in a user mode and a patch management unit running in a kernel mode cooperatively execute, and the method comprises the steps that after the patch management process completes loading of a patch pack, the patch pack is loaded in the user mode; acquiring a patch function address and an original function address in the patch pack to obtain a corresponding relation, and configuring the corresponding relation to a patch management unit; when the original function is called, the original function determines to execute the original function logic or jump to the address indicated by the hook parameter by judging the value of the hook parameter; and the patch management unit registers a corresponding probe for each patch function according to the corresponding relationship so as to trigger a processing function of the probe to execute an operation of modifying the value of the hook parameter into a corresponding patch function address before the original function is executed, so that an execution process is skipped to the patch function when the original function is called, and the original function is called. And managing the function-level hotfix of the kernel mode and the user mode in the same framework.

The application provides a resource allocation method and system of a passive optical network (PON) system, wherein the resource allocation method comprises: an MFU obtaining target information, the target information being associated with wireless demand corresponding to a first SFU and wireless demand corresponding to a second SFU, each wireless demand corresponding to bandwidth demand of N terminal devices, wherein the wireless demand corresponding to the first SFU is greater than the wireless demand corresponding to the second SFU; and the MFU sending wireless allocation information, the wireless allocation information being used for indicating first bandwidth allocated for the first SFU and second bandwidth allocated for the second SFU, the first bandwidth being greater than the second bandwidth. In the above method, the wireless resource demand of the connected user equipment is obtained, and the bandwidth of the SFU equipment is actively regulated according to the wireless resource demand, so that the bandwidth allocated for the SFU by the MFU is adapted to the bandwidth required by the wireless terminal equipment, and the utilization rate of the wireless resource is improved.

The invention relates to the technical field of optical network transmission, in particular to a twenty-five gigabit symmetric passive optical network transmission quality improvement method and a related device. The method comprises the steps that PCB routing layout optimization is conducted on an LD + / LD-differential signal line in a transmission link, impedance control over the differential signal line is achieved by adjusting the wiring gap and the wiring width of the LD + / LD-differential signal line and the integrity of a reference layer area, the consistency difference in PCB production is improved, and loss and interference in the signal transmission process are reduced. The PCB layout parameters of the LD + / LD-differential signal line are specifically optimized, the wiring gap is adjusted from 11.49 mi of a reference golden finger bonding pad to 5.75 mi of a reference chip BGA bonding pad, the wiring width is reduced from 20 mi to 10 mi, the integrity of a reference layer area is synchronously optimized, the differential impedance is accurately controlled from original 30 ohms to 60 ohms, and the reliability of the circuit is improved. And the parasitic parameter influence in signal transmission is effectively suppressed.

The invention provides a data forwarding method based on a vehicle-mounted passive optical network and a related device, and relates to the technical field of vehicle communication. In the data forwarding method, the first ONU gateway aggregates and packages the received multiple frames of 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 rate of the vehicle-mounted PON network is improved. Meanwhile, message grouping, uplink GEM frame packaging and uplink burst frame coding are directly completed through the first ONU gateway, the uplink burst frame is sent to the OLT, time delay and system resource consumption are reduced, the high real-time requirement of low-speed data (such as a sensor and a control signaling) in a vehicle-mounted scene is met, and therefore efficient and low-delay bearing of the low-speed data on a vehicle-mounted PON network is achieved.

The present patent describes methods and systems for the efficient integration and management of time-sensitive networking (TSN) networks using passive optical network (PON) components. The main focus is the creation of a harmonized interconnection between TSN networks and PON systems, optimizing the performance of time-sensitive communications. The proposed method includes the abstraction of PON links so that they function as TSN bridges, implementing advanced time synchronization and traffic scheduling systems, in accordance with standards IEEE 802.1AS (gPTP) and IEEE 802.1Qbv. The interconnection system is characterized by integrated time synchronization means, suitable processing units and network elements configured to manage quality of service (QoS). In addition, the method includes the dynamic configuration of TSN flow sessions, using a centralized network controller (CNC) for optimized management of TSN traffic and QoS in PON networks. The invention further introduces a new specific management framework for PON networks in TSN environments, ensuring efficiency and compatibility in data transmission. The invention represents a significant advance in the interoperability and performance of TSN and PON networks, offering a robust solution for time-sensitive data communications in a variety of application contexts.

The invention relates to a branch identification system and method of a passive optical network. The system comprises a central control unit, a light emitting module, a polarization analysis unit and a plurality of polarization control modules deployed in an optical splitter, wherein the plurality of polarization control modules are in one-to-one correspondence with a plurality of ports of the optical splitter; the optical transmitting module transmits a detection signal to the passive optical network; the polarization control module carries out modulation processing on the received detection signal according to a preset polarization state modulation rule, generates a reflection signal carrying a polarization fingerprint and transmits the reflection signal to the polarization analysis unit; the polarization analysis unit analyzes polarization fingerprints according to the reflection signals and sends the polarization fingerprints to the central control unit; and the central control unit determines a branch serial number corresponding to the reflection signal according to the polarization fingerprint, and determines a branch link identification result. By adopting the system, the identification of a plurality of branch links in the passive optical network is realized, manual intervention is not needed, normal communication service does not need to be interrupted, the network maintenance efficiency is improved, and the manpower and time cost is reduced.

The invention provides an optical module and optical communication equipment, the optical module comprises a first optical transmitter, a second optical transmitter, a polarization beam combiner and an interface, the first optical transmitter is used for transmitting first signal light propagating along a first direction, and the polarization state of the first signal light is a first polarization state; the second light emitter is used for emitting second signal light propagating along a second direction, and the polarization state of the second signal light is a second polarization state; the polarization beam combiner is used for receiving the first signal light and the second signal light, combining the first signal light and the second signal light into mixed light, and transmitting the mixed light to the interface. On the basis of a wavelength division multiplexing scheme of a passive optical network at present, two optical transmitters are combined into one path by utilizing a polarization coupling scheme, so that the isolation degree between signal light of a current multi-transmission scheme is ensured, the complexity of an internal optical path is reduced, and a multi-transmission form optical module scheme with high transmission quality, low crosstalk and high integration level is realized.

The invention relates to the technical field of optical fiber fault detection, in particular to a health monitoring system and method for a water diversion engineering optical fiber network, and the system comprises a sensing module which is used for synchronously collecting optical fiber environment parameters through an edge calculation node and a multi-source sensor array; the transmission network construction module is used for carrying out short-distance networking and constructing a backbone transmission network by adopting an industrial grade PON (Passive Optical Network) optical fiber network; the cloud management platform is used for preprocessing the data acquired by the transmission network construction module; inputting the preprocessed data into a preset D-S evidence theory fusion model to obtain an early warning trigger signal; and the fault classification module is also used for carrying out fault positioning and classification through the trained fault classification model after the edge node detects an abnormal signal, and outputting a fault position and a fault type. According to the invention, the problems of insufficient real-time performance and incapability of dealing with sudden faults in the prior art can be solved; the positioning precision and the fault identification capability are limited; the long-distance deployment cost is high; and the management complexity is high.

The invention belongs to the technical field of deterministic transmission, and particularly relates to a deterministic transmission method for a time division multiplexing passive optical network in computing power-power cooperative communication network networking, which comprises the following steps of: acquiring and identifying all time delay sensitive flows accessed to a TDM-PON (Time Division Multiplexing-Passive Optical Network), and pre-classifying periodic flows; clustering the similar periodic flow to form a shaping flow, and distributing a shaping window; calculating the least common multiple of all shaping flow periods as a super period; in a super cycle, an integer linear programming model is adopted to complete initial optimization time window distribution; carrying out secondary sorting and conflict elimination on the overlapped transmission windows, and scheduling the shaping stream by using the transmission windows after secondary optimization; the non-periodic flow is scheduled by using the idle time slot in the over-period; and continuously multiplexing a super-cycle scheduling scheme to complete a deterministic transmission process. According to the invention, high scheduling success rate, millisecond-level deterministic time delay and microsecond-level jitter control of large-scale periodic services are realized.

The invention provides a dumb resource management method and system, electronic equipment, a storage medium and a program product. The method comprises the following steps: acquiring an image of a passive optical network port resource through a micro camera; preprocessing the image through the edge cloud to obtain a preprocessing result; performing information extraction on the preprocessing result through the central cloud to obtain first resource information of the passive optical network port resource; and verifying the first resource information and the second resource information, and performing resource information management according to a verification result. According to the dumb resource management method provided by the invention, a passive optical network port resource image is collected through a micro camera, the edge cloud is utilized to preprocess the passive optical network port resource image to quickly obtain a preliminary result, and then the center cloud performs depth information extraction based on the preprocessing result to obtain first resource information; and the second resource information read by the resource system is verified, and accurate resource information management is realized according to a verification result, so that full-process automatic dumb resource management is realized.

The present disclosure relates to a monolithically integrated dual-wavelength transmitter for a passive optical network (PON), which may be suitable for both a gigabit PON (GPON) and a 10-gigabit-PON (XG-PON). The integrated transmitter includes two distributed feedback (DFB) lasers, a first DFB laser to emit a continuous first laser beam at a first wavelength along an optical path, and a second DFB laser to emit a modulated second laser beam at a second wavelength along the optical path in the same direction as the first DFB laser. The transmitter also includes an electro-absorption modulator (EAM) after the first DFB laser in the optical path, which is configured to modulate the first laser beam, and a distributed Bragg reflector (DBR) between the EAM and the second DFB laser in the optical path, which is configured to transmit light at the first wavelength

The invention relates to the technical field of computer networks, in particular to a wireless terminal roaming method and device based on a PON network, computer equipment and a storage medium. In addition, the wireless terminal roaming method based on the PON network can also be applied to fiber to room (FTTR), enterprise level fiber to room (FTTR-B) and broadband fusion terminal products. The method comprises the following steps: performing received signal strength scanning in response to a received signal strength scanning request from a current access point to obtain a scanning received signal strength indication value of the access point, obtaining a first actual received signal strength indication value for data transmission with the current access point, and determining a scanning compensation value according to the difference between the two values. Further correcting the scanning received signal strength indication values of other access points; the first actual received signal strength indication value and the scanning received signal strength indication correction values of the other access points are used for the current access point to determine a target access point to which the wireless terminal needs to be switched.

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.

The invention discloses a coherent PON system and a transmitting-receiving end IQ time delay compensation method, and relates to the technical field of optical access networks, the coherent PON system transmitting-receiving end IQ time delay compensation method comprises the following steps: configuring an OLT and an ONU end, enabling respective transmitting ends to transmit signals to respective receiving ends, and enabling the respective transmitting ends and the receiving ends to adopt the same light source; respectively calculating IQ time delays of respective sending ends and receiving ends, and storing results locally; and recovering the uplink and downlink data links of the OLT and the ONU for data transmission, and directly using the locally stored IQ time delay for compensation. According to the invention, the sending and receiving IQ time delays of the OLT and the ONU end can be accurately calculated, so that the problem of subcarrier mirror image crosstalk is solved.

The invention provides a link loss test method, device and equipment and a readable storage medium. The method comprises the following steps: transmitting a test signal from a passive optical network starting point; acquiring a target signal from the optical signals received from the passive optical network starting point; detecting whether an interference port exists in the passive optical network; if the interference port does not exist, taking the receiving optical power of the passive optical network starting point to the target signal as the receiving optical power of the passive optical network starting point to the test signal; and calculating the loss of the tested link according to the transmitting optical power and the receiving optical power of the starting point of the passive optical network to the test signal and the reflectivity of the target optical detection unit to the test signal. According to the invention, interference factors in the link loss test are detected and eliminated in diversified scenes of the passive optical network, the accuracy of the test result can be guaranteed, and the test cost and the quality risk are reduced.

This invention discloses a high-speed direct-modulation direct-detection passive optical network (SOA) receiver control method and system, relating to the field of optical access network technology. The high-speed direct-modulation direct-detection SOA receiver control method includes the following steps: amplifying the received optical signal and calculating the corresponding received power and bit error rate; using the received power and bit error rate as control parameters, performing closed-loop control to determine the optimal optical signal amplification amplitude. This invention enables the SOA output signal to be at the optimal received amplitude at the receiver, thereby increasing the receiver's power budget.

The utility model relates to the technical field of communication, and discloses a wall-mounted and vertical 10GPON router, which comprises a base, mounting blocks are hinged to two sides of the bottom surface of the base, mounting holes are formed in the four mounting blocks, a plurality of heat dissipation openings are formed in the bottom surface of the base, sleeves are fixedly connected to the top surface of the base close to the two sides, and the sleeves are fixedly connected to the top surface of the base close to the two sides of the base. Two mounting seats are fixed in the two holes, after the two mounting seats are fixed, the two sleeves on the bottom face of the base, the two conical blocks and the two mounting seats are correspondingly pressed, the two conical blocks enable two spring clamping blocks to stretch out and draw back when the two spring clamping blocks are attached to one faces of two top blocks through pressing force, and the two spring clamping blocks are clamped into the two top blocks through pressing force. And then one ends of the two spring clamping blocks stretch out and draw back to the outer wall positions of the two sliding rods, so that the ends of the two spring clamping blocks are clamped on the back faces of the two top blocks, then equipment installation is completed, and the stability of the equipment hung on the wall is improved.

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 present disclosure relates to the technical field of computer, and provides a network construction scheme generation method and device, a program product and an electronic device. The method comprises: predicting a first number of new users of each residence according to regional data of a target region and network user data of each residence; determining a second number of new users of each machine room of the target region based on the first number of new users of each residence; determining an allocated user number of a single existing passive optical network device interface of each machine room based on the second number of new users, an existing user number and a first number of existing passive optical network device interfaces; obtaining a number of passive optical network device interfaces that need to be newly built for each machine room based on a relationship between the allocated user number of the machine room and a preset threshold of the machine room; and generating a network construction scheme according to the number of new users of each machine room and the number of newly built passive optical network device interfaces of each machine room. The present disclosure can improve the accuracy of the generated network construction scheme.

An example apparatus may include an optical splitter apparatus that includes a dual mode fiber having a single mode fiber core embedded in a multi-mode fiber core, a plurality of single mode fibers, and a funnel waveguide coupling the dual mode fiber to the single mode fibers. The optical splitter apparatus may be for use in a passive optical network. The single mode fiber core may be for transmitting downstream optical signals, where the funnel waveguide distributes the downstream optical signals to the single mode fibers. In addition, the single mode fibers may transmit upstream optical signals, and the funnel waveguide may direct the upstream optical signals into the multi-mode fiber core. The optical splitter apparatus may have an asymmetric insertion loss ratio between the downstream optical signals received via the single mode fiber core and the upstream optical signals received via the single mode fibers.

The invention discloses an optical cable monitoring method and system based on a passive optical network, and relates to the technical field of optical cable monitoring, and the method comprises the following steps: S1, carrying out the associated collection of a residual optical signal of an idle fiber core and a reflected optical signal of each idle port of an optical splitter; s2, preliminarily identifying an optical cable fault and triggering a positioning process; s3, outputting fault point distance information; and S4, completing positioning result verification and outputting fault type speculation. According to the invention, by multiplexing the idle fiber core residual optical signal in the passive optical network and the optical splitter idle port reflection optical signal, a double-source correlation acquisition mechanism is constructed, so that the defects that the idle fiber core residual optical signal is weak in intensity and is easily interfered by environmental scattering and link loss are avoided; and the defect of low feature identification degree caused by the influence of end face pollution and tiny vibration on a reflected light signal at the port of the optical splitter is overcome, effective features are enhanced through double-source signal complementation, and a more reliable signal basis is provided for subsequent fault judgment and positioning.

The present invention discloses a dual-homed voice service recovery method and device, wherein the method includes the following steps: pre-configuring the Virtual Routing Redundancy Protocol (VRRP) deployed on the master and backup devices on a passive optical network (PON) link and planning voice services; when triggering a switchover between the master and backup devices on the PON link, dynamically adjusting the VRRP protocol priorities of the master and backup devices to dynamically switch the master and backup device states, and synchronously completing the update of the user-side voice service Address Resolution Protocol (ARP) table entries on the master and backup devices to restore voice services. This application can quickly restore unicast services when the PON link switches, while avoiding user service changes caused by the switching of gateway devices after the link switchover, making user-side service planning more convenient and saving resource consumption.

The invention relates to the field of integrated circuit design, in particular to a burst mode trans-impedance amplifier circuit for a 50G PON (Passive Optical Network), which comprises a high-frequency signal main circuit and a quick response auxiliary circuit, and the high-frequency signal main circuit realizes high-sensitivity amplification of low-optical-power signals and low-gain amplification of high-optical-power signals through the variable-gain transimpedance-stage amplification circuit and the amplitude-limiting post-stage amplification circuit. The quick response auxiliary circuit realizes ordered quick gain control and quick direct current bias elimination through a quick average value detection circuit controlled by different reset signals generated by the two circuits, and realizes quick response to burst signals together with the high-frequency signal main circuit. The device has the characteristics of high bandwidth, quick response and the like, can stably convert and amplify 50Gbps burst signals, and is suitable for a 50G PON uplink burst mode optical receiver system.

A coding modulation method, demodulation and decoding method and device for a passive optical network are applied to the technical field of passive optical networks, and the coding modulation method comprises the following steps: carrying out system polarization coding on a received first data stream to obtain a second data stream with an information bit and a frozen bit; according to a preset many-to-one mapping rule, mapping the second data stream to a symbol set to obtain a mapped symbol stream; and adjusting the sending probability of each symbol in the symbol stream through truncation probability shaping in a preset format to obtain a modulated modulation signal. According to the invention, the coding modulation of the data is carried out by combining the system polarization coding technology, the many-to-one mapping technology and the truncation probability shaping technology, so that the data can be obtained through simple inverse operation, the introduction of a distribution matcher to realize probability shaping is avoided, the complexity source is reduced, and the data processing efficiency is improved. And meanwhile, the algorithm complexity is greatly reduced compared with the algorithm which needs to be subjected to iterative de-mapping and decoding.

The embodiment of the invention relates to a passive optical network activation method, equipment, a device and a medium. In accordance with an example embodiment of the present disclosure, a first device receives a key control message from a second device during a key exchange. The key control message instructs the first device to generate and transmit a key by using an encryption algorithm to be used, or to confirm a key corresponding to a currently used encryption algorithm. The key control message also instructs the first device to generate a key report based on the key control message, and to send the key report to the second device. In this way, the secret key and the encryption algorithm in the communication process of the first device and the second device can be matched, and the stability of channel work is improved.