259results about "Bidirectional transmission" patented technology

Various embodiments provide for electro-photonic networks, including a plurality of processing elements connected by bidirectional photonic channels, suited for implementing neural-network models. Weights of the model may be preloaded into memory of the processing elements based on assignments of neural nodes to processing elements implementing them, and routers of the processing elements can be configured to stream activations between the processing elements based on a predetermined flow of activations in the model.

The invention relates to the technical field of network security, and particularly discloses a front digital boundary security switching method and system based on an optical one-way transmission characteristic and a storage medium, and the method comprises the steps that a front digital boundary security gateway of a service extranet receives a request, analyzes a context parameter of the request, and stores the context parameter of the request; legality verification is carried out on the carried exchange account, the key and other request parameters, and request context parameters are signed and encrypted; after the legality verification is passed, the service extranet front digital boundary security gateway encapsulates the request context parameter into a request data packet, a unidirectional data transmission optical shutter connection pool from the extranet to the intranet is used, and the request data packet is sent to the intranet front digital boundary security gateway after the connection is obtained; and after receiving the request data packet, the intranet front digital boundary security gateway decrypts and verifies the signature of the request message in the request data packet, reconstructs the request message after the verification is successful, and sends the request message to a real target server to obtain a result.

The invention relates to an underwater optical communication LDPC (Low Density Parity Check) coding processing method. The method comprises the following steps: determining a current channel quality grade based on a real-time communication distance and channel state information; dynamically selecting LDPC (Low Density Parity Check) coding parameters and modulation orders in combination with equipment mobile data and channel quality levels, and generating an adaptive parameter combination; performing error correction coding on the data according to the selected parameters and generating an optical communication signal; transmitting to a receiving end through an optical channel; and dynamically updating the coding parameter and the modulation order based on the feedback information of the receiving end. According to the method, the problem that a traditional fixed coding scheme is insufficient in error correction capability or wastes resources in a dynamic distance scene is solved by predicting the equipment moving trend and the channel state in real time and adaptively adjusting the coding parameters and the modulation mode, the error rate is remarkably reduced, the communication efficiency is improved, and the method is suitable for a complex and changeable underwater optical communication environment.

Electro-photonic networks, including a plurality of processing elements connected by bidirectional photonic channels, suited for implementing neural-network models. Weights of the model may be preloaded into memory of the processing elements based on assignments of neural nodes to processing elements implementing them, and routers of the processing elements can be configured to stream activations between the processing elements based on a predetermined flow of activations in the model.

The present invention provides a semiconductor apparatus achieving interconnection by using an on-chip all-optical switching network module and a manufacturing method therefor. The semiconductor apparatus comprises: a circuit board, which has a plurality of electrical connection paths; an on-chip all-optical switching network module, which is disposed on the circuit board, the on-chip all-optical switching network module comprising a photonic chip and a plurality of analog electrical chips for transceiving which are arranged above the photonic chip, the photonic chip comprising a plurality of communication nodes, a plurality of optical connection paths, and at least one on-chip optical switch which are in corresponding communication connection with the plurality of analog electrical chips for transceiving, and the on-chip optical switch being configured to alter the connection topology among the plurality of communication nodes; and a plurality of computing modules, which are arranged on the circuit board and, by means of the electrical connection paths on the circuit board, are in corresponding communication connection with the plurality of analog electrical chips for transceiving of the on-chip all-optical switching network module, so that the connection topology among the plurality of computing modules can be altered by the on-chip optical switch.

The invention relates to the technical field of optical fiber transmission, and discloses a bidirectional optical fiber transmission system. Comprising a first wavelength division multiplexing / demultiplexing device, a second wavelength division multiplexing / demultiplexing device, a first power amplifier, a second power amplifier, a first preamplifier, a second preamplifier, a first optical fiber switching module, a second optical fiber switching module, a first filter, a second filter, a third filter and a fourth filter. The first optical fiber switching module and the second optical fiber switching module are provided with a first optical fiber or a second optical fiber for transmitting optical signals; according to the technical scheme, automatic switching to the standby optical fiber link is supported when the single optical fiber link fails or the performance is reduced, shunting and combining of wave band signals are achieved through the filter, and the stability and the anti-interference capability of transmission signals are ensured.

An Optical Time Domain Reflectometer (OTDR) includes a transmitter configured to transmit first OTDR pulses, at a first pulse period and at a wavelength λ, over a fiber under test; a receiver configured to receive signals from the fiber under test; and circuitry configured to set the first pulse period and to average measurements resulting from the received signals, wherein the OTDR is configured to operate with a second OTDR at another end of the fiber under test for a bidirectional OTDR measurement, wherein the second OTDR uses the same wavelength λ and transmits second OTDR pulses at a second pulse period, different from the first pulse period.

The invention discloses a mobile communication emergency digital remote system, and relates to the technical field of mobile communication, the mobile communication emergency digital remote system comprises a base station, a signal feedback transmission unit, a far-end machine and a near-end machine which are in electric signal connection; and the base station is used for receiving, processing and sending signals. Through cooperative work of the far-end machine and the near-end machine, the flexibility and adaptability of the communication system are remarkably improved, the far-end machine is responsible for signal receiving and transmitting, the near-end machine is responsible for signal processing and power adjustment, and high-speed and low-delay data transmission is ensured through optical fiber connection between the far-end machine and the near-end machine; the system can be flexibly configured according to different environmental conditions and user requirements, and in addition, the system has the capability of automatically adjusting the power, the output power can be optimized in real time according to the change of the signal quality, and the stability and reliability of communication are ensured.

Various embodiments provide for clock signal distribution within a processor, such as a machine learning (ML) processor, using a photonic fabric.

The invention provides a communication device and system. The device is applied to an optical fiber communication point-to-multipoint framework. The device comprises an optical module, a processing module, a first element and a second element. The first element is used for acquiring a second signal, and correlation exists between the second signal and the first signal. The first signal includes a signal received by the communication device. The second element is configured to couple a second signal to a transmit link of the communication device. The optical module is also used for converting the second signal into an optical signal and transmitting the optical signal to slave optical equipment associated with the communication device in a point-to-multipoint architecture. According to the invention, the problem of hidden nodes in a point-to-multipoint architecture based on optical fibers can be solved, and the performance and stability of a Wi-Fi network are improved.

Conventional high performance computer connections are electron-based systems, which require the memory packages to be as close as mechanically possible to the computation engine. Low power and high bandwidth communication, e.g. photonic, links can drastically change the architecture of high-performance computers by eliminating the bottlenecks in communication and augment existing memory systems to allow them to be both high capacity and high bandwidth simultaneously. A computer system comprises: a plurality of memory aggregation devices configured to retrieve data from and store data in a plurality of random access memory modules forming a unified contiguous memory address space disaggregated from a processing unit; a plurality of computational devices configured for simultaneously launching a plurality of data signals including memory read and / or write requests for the data to the plurality of memory aggregation devices; and a plurality of communication links coupling each of the plurality of memory aggregation devices to each of the plurality of computational devices for transferring the data therebetween.

The invention discloses an intelligent optical path protection monitoring system for a power system. The intelligent optical path protection monitoring system comprises a master station end arranged in a communication machine room in a power supply area and substation ends arranged in transformer substations. In the master station end, an optical transceiver is connected with an OLP protection unit, an optical pulse tester is connected with the OLP protection unit through a program control multi-path optical switch, and a master control board is connected with the optical pulse tester and the OLP protection unit. In the substation end, the optical transceiver is connected with the OLP protection unit, and the main control board is connected with the OLP protection unit; and the OLP unit of the main station end is connected with the OLP unit of each sub-station end through a main link optical fiber and a standby link optical fiber. According to the invention, optical path automatic switching protection and optical cable on-line visual monitoring analysis can be realized, and a real-time, rapid and accurate fault point positioning means can be realized.

The invention discloses a road collapse monitoring method, device and equipment and a storage medium, relates to the field of traffic safety, is applied to monitoring equipment located on a monitoring point, and comprises the steps that a preset channel quality detector is used for checking a first target optical fiber to judge whether the channel quality changes or not, when the change degree meets a preset condition, generating an abnormal signal for analysis to obtain an optical fiber abnormal reason analysis result; performing communication transmission with each preset signal receiving and answering device through a second target optical fiber so as to determine whether a target monitoring road corresponding to the monitoring point collapses or not and determine a corresponding initial collapse position when the target monitoring road collapses; the initial collapse position is corrected based on the optical fiber abnormity reason analysis result, and the corrected collapse position is sent to the target platform so that the target platform can execute collapse early warning operation; the first target optical fiber and the second target optical fiber are laid on a target monitoring road. According to the method and the device, the possibility of road collapse is predicted, and the collapse position is quickly positioned.

The invention provides a semiconductor device for realizing interconnection by using an on-chip all-optical switching network module and a manufacturing method thereof. The semiconductor device includes: a circuit board having a plurality of electrical connection paths; the on-chip all-optical switching network module is arranged on the circuit board and comprises a photon chip and a plurality of analog electric chips which are arranged above the photon chip and are used for transmitting and receiving; the photon chip comprises a plurality of communication nodes, a plurality of optical connection paths and at least one on-chip optical switch which are in corresponding communication connection with the plurality of analog electric chips for receiving and transmitting, and the on-chip optical switch is configured to be capable of changing the connection topology among the plurality of communication nodes; and the plurality of calculation modules are arranged on the circuit board and are in corresponding communication connection with the plurality of analog electric chips for transmitting and receiving of the on-chip all-optical switching network module through the electric connection paths on the circuit board, so that the connection topology among the plurality of calculation modules can be changed by the on-chip optical switch.

The embodiment of the invention discloses a data sending method, a communication device and a storage medium, which are applied to the technical field of communication and are used for informing an opposite-end channel of a fault when a port fault occurs. The method comprises the following steps: a first communication device acquires that a first channel corresponding to a first optical module is abnormal, wherein the first channel is a channel between the first optical module and a second optical module; the first communication device sends and / or receives data by using N channels in M channels corresponding to the first optical module, the M channels are channels between the first optical module and the first communication device, the N channels do not include a second channel, the second channel is at least one channel corresponding to the first channel in the M channels, and N is smaller than M; and the first communication device sends control information to the first optical module, wherein the control information is used for instructing the first optical module to turn off light corresponding to the first channel. According to the embodiment of the invention, the opposite terminal can be informed of the fault of the first channel by turning off the light corresponding to the first channel.

This application relates to the field of optical communication technologies, and discloses a data processing method and apparatus in optical communication, to provide a data processing solution applicable to scenarios in which a transmission rate is higher than 800 Gbps. In embodiments of this application, data streams are distributed, so that bits obtained through FEC encoding processing are relatively evenly distributed in different data streams, for example, on optical signals with different wavelengths and in different polarization directions, or on different optical fibers and in different polarization directions. The way of distribution makes parallel transmission of data streams possible, thereby improving a transmission rate. Additionally, this application does not require devices with a higher baud rate, and is applicable to metro telecommunication transmission and data center transmission scenarios that require low power consumption. Additionally, because the bits obtained through FEC encoding processing are relatively evenly distributed in the different data streams, decoding errors of a receiver are relatively evenly distributed on a plurality of paths of FEC decoding processing, so that codec performance can be improved.

The invention relates to the technical field of signal processing, in particular to a fault monitoring method and device for an optical fiber two-way communication line, computer equipment and a storage medium. The target monitoring signal is an electric signal obtained after photoelectric conversion of Rayleigh back scattering light and Fresnel reflection light generated by the probe light in the transmission process of the optical fiber to be detected; performing signal decomposition on the target monitoring signal sequence by adopting a discrete wavelet transform method to obtain first wavelet decomposition data; performing signal reconstruction according to the first wavelet decomposition data by adopting a wavelet inverse transformation method to obtain a first reconstruction signal sequence; and performing fault event analysis according to the first reconstruction signal sequence to obtain positioning data and power loss data of a plurality of fault events, and taking the positioning data and the power loss data as fault event monitoring results of the to-be-detected optical fiber. Fault positioning and power loss estimation are carried out timely and effectively, and real-time on-line monitoring of a long-distance optical fiber two-way communication line is realized.

An Optical Time-Domain Reflectometer (OTDR) trace correction method, an electronic device, and a storage medium are disclosed. The method may include: establishing a parameter decoupling equation according to a fiber loss coefficient and a Stimulated Raman Scattering (SRS) transfer coefficient in response to ignoring an SRS transfer amount amplified or absorbed by an OTDR wavelength in an Optical Transport Network (OTN) service; disabling a service wavelength of an OTN of an optical fiber transmission system, and acquiring, according to the parameter decoupling equation, a first OTDR trace of an OTDR simulation wavelength in the optical fiber transmission system when the service wavelength of the OTN is in a disabled state; determining a fiber loss coefficient according to the first OTDR trace.

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.

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.

An optical-layer module, an access site, and an optical signal processing method are provided, and relate to the field of optical communication technologies. In this application, in optical-layer wavelength-drop processing, the access site performs splitting through a splitter in a broadcast manner. A wavelength-drop wavelength is not fixed, so that the access site has a colorless capability. In wavelength-add processing, to prevent a conflict between a wavelength-add wavelength and an optical signal (that is, a pass-through optical signal) in a main line, a wavelength-add blocker (for example, an optical switch) blocks a wavelength-add signal that has a conflict, thereby avoiding crosstalk between the wavelength-add signal and an existing signal in the main line. Both each wavelength-drop port and each wavelength-add port in an optical-layer board provided in this application support being multiplexed as extended ports. Port extension can improve flexibility of network deployment. In addition, a new board is developed to increase a quantity of ports, thereby reducing development resources and development costs.

The embodiment of the invention relates to the technical field of optical modules, and provides a multi-channel long-distance optical module, which comprises a shell, at least two groups of signal input and output interfaces and a multi-channel module, the signal input and output interface is used for receiving and preliminarily amplifying an external optical signal; and the multi-channel module comprises at least two multi-path selection switch units, and the multi-path selection switch units are connected with the output end of the signal input and output interface and are used for selecting optical signals and routing the selected optical signals to specified signal transmission channels. According to the multichannel long-distance optical module provided by the embodiment of the specification, multichannel long-distance signal transmission can be realized in a low-cost and simple manner.

The invention provides an optical fiber transmission system and method with multi-module synchronization and FPGA logic remote upgrading, belongs to the technical field of data transmission, and solves the problems that an existing optical fiber transmission system is provided with a small number of optical modules, the interface rate is low, and the data transmission efficiency is low. The invention discloses an optical fiber transmission system which solves the problems that in the prior art, the requirement for high-speed data transmission cannot be met, the FPGA logic program updating time consumption is large, extra interface resource overhead exists, and the transmission distance is limited in the prior art, and the optical fiber transmission system comprises N PCIe optical fiber data transmission modules which are connected with one another through synchronous interfaces, each PCIe optical fiber data transmission module comprises an FPGA control chip, a DDR cache, a FLASH chip, a clock, a synchronous interface, a power supply conversion unit, a PCIe interface and at least one optical fiber interface.

Device topologies for monolithic electro-photonic integrated circuits comprising optical transmitters and receivers are disclosed, wherein each transmitter comprises a first electro-absorption modulator (EAM) waveguide and EAM driver electronics and each receiver comprises a waveguide photodiode, which may be a second EAM waveguide, and a transimpedance amplifier (TIA); and an optical input port for coupling an external laser to each of the transmitters, or an on-chip laser. Monolithic integration of photonics and electronics on a single chip with compact form factor provides reduced interconnect path lengths between the EAMs and the electronics compared to discrete electronics. Tx optical output ports and Rx optical input ports may be interleaved, or banked, along a first (beachfront) edge of the chip with a port-to-port spacing of ≤350μm. The epitaxial layer structure may be fabricated from InP-based materials providing electronics layers comprising InP HBTs, and overlying photonics layers providing first and second EAM waveguides.

An optical communication module, an optical communication system and a control method of an optical amplifier, the optical communication module comprising an optical transmitter, an optical amplifier and a control unit, the optical transmitter being configured to output a first optical signal to the optical amplifier. The optical amplifier is used for amplifying the first optical signal into a second optical signal and outputting the second optical signal to the control unit. And the control unit is used for acquiring a first gain spectrum of the second optical signal and a target gain spectrum of the optical amplifier, and adjusting the working temperature and / or the driving current of the optical amplifier until the similarity between the first gain spectrum and the target gain spectrum is greater than a first threshold value. The pre-tilt control of the optical amplifier is realized by adjusting the working temperature and / or the driving current of the optical amplifier, higher pumping power is not needed, and a device which can influence the optical amplifier does not need to be additionally introduced, so that additional insertion loss is not introduced, and the performance degradation of the whole optical communication system is avoided.

The invention relates to the technical field of optical communication, in particular to a unified cost calculation method and device based on Astar path finding. On the basis of Astar heuristic search, relay cost attenuation is adopted, and the minimum relay cost h is obtained; describing wavelength distribution and a near wave variable wave scene by adopting discrete normal distribution to obtain a passing path cost g; and obtaining a unified cost according to the minimum relay cost h and the path passing cost g. According to the invention, path calculation speed, smooth variable waves and more accurate relay estimation cost can be ensured under the condition of large business volume.

The application discloses a mode division multiplexing all-optical regenerative device, which comprises a polarization controller, a few-mode amplifier, an optical coupler, a few-mode nonlinear optical fiber, an optical carrier extractor and an optical phase shifter. Mode division multiplexing signals of multi-level pulse amplitude modulation from different users can be simultaneously regenerated by the mode division multiplexing all-optical regenerative device, the regenerated mode division multiplexing signals are amplified and shaped, and the power transfer curve of each mode channel is not affected by the change of other mode levels.

The application provides a kind of based on optical band-stop filter complex double sideband signal direct detection method and system, the method and system are based on optical band-stop filter receiver in receiving end setting, the receiver is divided into two categories according to structure, one kind is based on optical band-stop filter and 90 degree mixer receiver, one kind is based on optical band-stop filter and 2x2 coupler receiver.The application is realized by setting optical band-stop filter to help complex double sideband signal optical field recovery, then square law detection is carried out using photoelectric detector to estimate SSBI, finally subtracts the estimated SSBI from the reconstructed complex signal.By the receiver, the SSBI caused by direct detection can be effectively suppressed, thereby realizing optical field recovery under low CSPR.Compared with the existing double sideband self-coherent method, the required CSPR is significantly reduced, and the OSNR sensitivity of the system is also significantly improved.

The invention provides an information transmission method, which is used for internet protocol (IP) equipment, the IP equipment comprises a colorful light module, and the method comprises the following steps: determining a first top adjusting signal according to operation, administration and maintenance (OAM) information, the first top adjusting signal carrying the OAM information; and sending the first topping signal as a light associated signal in the first color light signal to an optical transmission network OTN device. The invention further provides an IP device, an OTN device and a computer readable medium.

The invention discloses a full-duplex terahertz and space laser fusion transmission system, and relates to the field of terahertz communication and optical communication, and the system comprises an optical signal receiving and transmitting module which is used for intelligently selecting and switching a terahertz link or a space laser link according to a channel environment and a weather condition, an optical signal is transmitted to the terahertz / space laser optical fiber wireless conversion module or is received from the terahertz / space laser optical fiber wireless conversion module; the terahertz / space laser optical fiber wireless conversion module is used for completing carrier signal generation, data modulation, demodulation, amplification, splitting and combining and other processing on an optical domain and an electric domain; and the wireless transceiver module is used for transmitting or receiving the terahertz signal and the space laser signal in a wireless mode. According to the invention, the terahertz link or the space laser link can be switched to carry out signal transmission according to the channel condition and the weather environment, the anti-interference capability of the communication system is greatly improved, and stable and efficient communication in almost all-weather scenes such as rain, snow and fog is ensured.