1170 results about "Optical networking" patented technology

A method and system for routing high-speed data to and from SANs (Storage Area Networks and Server Area Networks) via optical burst-switched (OBS) networks. OBS network components, including edge nodes and switching nodes, are coupled between SAN islands. In one embodiment, the OBS network comprises a photonic burst-switched (PBS) network. Under one scheme, a PBS edge node and SAN gateway are co-located at the interface to the SAN, while a plurality of PBS switching nodes are deployed between the PBS edge nodes. Under another scheme, PBS switching/edge nodes are co-located at respective SANs. This scheme employs an external gateway protocol (EGP) for routing data via selected route segments. Data going to and received from a SAN is packaged as Fibre Channel Frames. Data transmitted via the PBS network is converted into PBS frames having encapsulated Fibre Channel Frames. The schemes also support interfaces with legacy networks, such as LANs and WANs.

The invention relates to a system and method of communication between optical transceivers in an optical WDM network, wherein a broad-band modulation of optical signals in a primary frequency band is utilized for transmitting primary high-speed data, while a plurality of relatively low-frequency in-band subcarriers is used to modulate the optical signals to transmit secondary data between network nodes, wherein the plurality of low-frequency subcarriers lie at least in part within the primary frequency band.

A remote interface network in which multiple remote HID encoder/decoder units share a common physical transport medium for connecting to one or more processing unit encoder/decoders is described. In one embodiment, the physical transport medium includes an optical shared media transport network. Each remote HID encoder/decoder unit can support one or more remote HIDs. The processing unit encoder/decoder can support one or more Pus. The network can be used, for example, in office, hospital, dense seat (e.g., aircraft, bus, etc.) and content provider networks.

The embodiment of the invention discloses a passive optical network system and a downlink transmission method thereof. The passive optical network system comprises an optical line terminal, an optical distribution network and a plurality of optical network units. The optical line terminal is used to send a downlink multi-wavelength optical signal composed of a plurality of downlink optical signal wavelength division multiplexing having different wavelengths, and the optical distribution network comprises a first-stage optical splitter, a plurality of second-stage optical splitters and a plurality of filter modules. The first-stage optical splitter is used to divide a downlink multi-wavelength signal sent by the optical line terminal into a plurality of downlink multi-wavelength signals, the plurality of filter modules are used to carry out filter processing on the plurality of downlink multi-wavelength signals to obtain a downlink single wavelength optical signal of which the wavelength corresponds to a channel central wavelength; wherein, the channel central wavelengths of the plurality of filter modules respectively correspond to the plurality of downlink optical signals having different wavelengths, the second-stage optical splitters are used to carry out spectral processing on the downlink single wavelength signal and then provide the downlink single wavelength signal to the optical network unit.

An apparatus comprising one or more nodes. The apparatus may be configured to transport one or more packets within a frame. The one or more nodes may be configured to add and/or drop at least one of the one or more packet from the frame.

An optical communication system provides coherent optical transmission for metro applications. Relative to conventional solutions, the optical communication system can be implemented with reduced cost and can operate with reduced power consumption, while maintaining high data rate performance (e.g., 100 G). Furthermore, a programmable transceiver enables compatibility with a range of different types of optical networks having varying performance and power tradeoffs. In one embodiment, the optical communication system uses 100 Gb/s dual-polarization 16-point quadrature amplitude modulation (DP-16QAM) with non-linear pre-compensation of Indium Phosphide (InP) optics for low power consumption.

An optical network includes a multidimensional coder and modulator for handling multiple-in-multiple-out MIMO spatial lightpath properties and content of any specific supercarrier, a spatial mode multiplexer responsive to orthogonal frequency division multiplexing OFDM transmissions and the multidimensional coder, a spatial-spectral routing node coupled over a fiber link to the spatial mode multiplexer for performing switching granularity by a spatial mode reconnection, a multidimensional decoder and demodulator; and a spatial mode demultiplexer coupled over a fiber link to the spatial-spectral routing node and responsive to the multidimensional decoder and demodulator.

A moving coil motor has an axisymmetric magnetic field applied to the drive coils on the movable member of the motor. The movable member is suspended by springs. The moving coil motor may be configured in a MEMS format, with the movable member and its suspension springs fabricated from a mono-crystalline substance to improve structural integrity. MEMS based moving coil motors may be configured in an array. Sensors are provided to detect the relative spatial positions of the movable member. The movable member may include several tiers. In one application, the moving coil motor may be configured to support and drive a mirror surface on the movable member to form a galvanometer, optical switch, or other optical component. Singular moving coil motors may be configured in an optical cavity to facilitate the tuning of specific wavelengths while a number of moving coil motors may be configured to form an array of optical switches to facilitate switching in a multi-channel optical network.

Optical networking has become ubiquitous in providing low cost, high speed communications networks supporting our communication needs from FTTH through long haul to undersea. The large number of users and high speeds provided to each user fiber mean that information retrieval and routing functionality within the data centers hosting this information can become the bottleneck both in terms of speed and latency. According to embodiments of the invention the inventors present architectures based upon all-optical passive optical networks that support a distributive approach to latency reduction as well as protocols relating to their deployment. Beneficially, such POCXN concepts exploit optical components already supported by high volume manufacturing techniques as well as CWDM/DWDM techniques for throughput increase.

This invention relates to the design of a scaleable high performance multiservice network based on programmable transport. A meshed network with dynamically-adjustable link capacities and nodes which provide data packing into "containers" for transport is proposed. A ring-based network, exchanging data containers among its nodes, is the preferred implementation, due to its flexibility, maintainability, and high reliability. With lossless rings, the quality of service is controlled solely by the origin and destination nodes, without any interference from other data streams. Flexible programmable transport greatly improves the performance, simplifies the controls, and facilitates scaleability. The concept is a departure from classical network thinking. By reducing the complexity of the network core, an economical, reliable, and manageable network with feature-rich edge nodes can be realized. An architecture with recursive ring-based structures provides a high degree of flexibility in bandwidth allocation and is compatible with current transport networks and future all-optical networks.

Data may be preconditioned to be transferred on a switched underlay network to alleviate the data access and transfer rate mismatch, so that large files may be effectively transferred on the network at optical networking speeds. A data meta-manager service may be provided on the network to interface a data source and/or data target to prepare a data file for transmission, such as by dividing a large file into multiple pieces and causing those pieces to be stored on multiple storage subsystems. The file may then be read from the multiple storage subsystems simultaneously and multiplexed onto scheduled resources on the network. This enables the high bandwidth transfer resource to be filled by a data transfer without requiring the storage subsystem to be augmented to output the data at the network transfer rate. The file may be de-multiplexed at the data target to one or more storage subsystems.

The invention is used for helping multi SPC services with same source and same destination to rapidly establish label-switching path, and at the same time, ensuring the label-switching establishment of said SPC services not to be failure due to insufficient resources, and to rapidly recover from the failure. The method comprises: according to the request, calculating at least one group of route passing through same nodes, and along with said group of routes, establishing one group of label-switching path once. The apparatus thereof comprises a calculation requesting module, a path calculating module and a path establishing module.

An optical network includes a transmitting portion configured to (i) encode an input digitized sequence of data samples into a quantized sequence of data samples having a first number of digits per sample, (ii) map the quantized sequence of data samples into a compressed sequence of data samples having a second number of digits per sample, the second number being lower than the first number, and (iii) modulate the compressed sequence of data samples and transmit the modulated sequence over a digital optical link. The optical network further includes a receiving portion configured to (i) receive and demodulate the modulated sequence from the digital optical link, (ii) map the demodulated sequence from the second number of digits per sample into a decompressed sequence having the first number of digits per sample, and (iii) decode the decompressed sequence.

The embodiment of the invention discloses a device for detecting optical power of a passive optical network (PON). The device comprises a receiving module, a detection module and a controller, wherein the receiving module is used for receiving optical signals sent by an optical network unit (ONU); the detection module comprises a current mirror received signal strength indication (RSSI) detection branch and a logarithmic amplifier RSSI detection branch; the current mirror RSSI detection branch and the logarithmic amplifier RSSI detection branch are respectively coupled with the receiving module and used for carrying out RSSI measurement on the optical signals received by the receiving module in accordance with received RSSI function trigger signals; and the controller is coupled with the detection module and used for outputting the RSSI function trigger signals to the detection module, selectively receiving RSSI measurement results which are output by the RSSI detection branch and correspond to the luminous intensity of the optical signals sent by the ONU according to the selection control signals provided by a selection control signal generating module, and calculating the optical power information of the optical signals in accordance with the RSSI measurement results. The embodiment of the invention also discloses a method for detecting optical power of a PON and a PON system.