67 results about "Optical circuit switching" patented technology

A network traffic collecting and monitoring system includes a traffic processing and dispatching module that pre-processes network traffic received from traffic tapping modules. A traffic collecting module receives and consolidates the network traffic and sends the network traffic to higher-layer applications. A controller dynamically configures the traffic processing and dispatching module to achieve optimal measurement accuracy and network coverage.

The present disclosure describes systems and methods for reconfiguring the links made by a plurality of optical circuit switches between the nodes of the first layer and the nodes of the second layer that reduces the throughput loss when the network transitions form a first logical topology to a second logical topology. More particularly, the first logical topology is realized by a specific physical topology, while the second logical topology may be realized by one or more physical topologies. The disclosure describes a method for selecting a second physical topology from the one or more physical topologies that will realize the second logical topology while reducing the number of links within each of the optical circuit switches that must be reconfigured (i.e, disconnected from their present ports and reconnected to new ports within the optical circuit switch) to transition from the first to second logical topology.

A Wavelength Division Multiplexing (WDM) multi-mode switching system and method and method provides concurrent switching in various switching modes. For example, WDM links may communicate data in various switching modes including, but not limited to, an electronic packet switching (EPS) mode, optical circuit switching (OCS) mode, and optical burst switching (OBS) mode. Edge routers and core routers in the WDM multi-mode switching systems and methods provide switching and processing necessary to handle data provided in the various switching modes. Further, the WDM multi-mode switching systems and methods can also provide dynamic reconfiguration between the various switching modes.

The invention discloses an on-chip optical router for hybrid switching, which mainly solves the problems of high communication delay, low network transmission efficiency and low resource utilization rate facing a single exchange mechanism in the existing on-chip optical router. The router comprises an OCS (Optical Circuit Switching) part and an OPS (Optical Packet Switching) part, wherein each part is composed of an electric field module and an optical field module, the OCS electric field module establishes an optical link for the OCS optical field module according to electric link establishing information before transmitting messages, and the OPS electric field module provides control information for the OPS optical field module in a transmitting and switching process of optical packets. The OCS part is used for transmitting the messages for using an OCS switching mechanism, and the OPS part is used for transmitting the messages for using an OPS switching mechanism. The on-chip optical router respectively optimizes performances of different types of messages, has the advantages of less communication delay, high network transmission efficiency and high resource utilization rate, and is suitable for interconnections and communications in an on-chip optical network.

The invention discloses an optical interconnection network system of a data center based on a hyper-cubic cluster and a communication method, which are mainly used for solving the problems of insufficient bandwidth of a network link and high network expense and energy consumption of the traditional data center. The network system provided by the invention comprises N top-of-rack optical switches, N top-of-rack electric switches and N*s servers, wherein each top-of-rack electric switch is connected with s servers and one of the top-of-rack optical switch to form N basic network units; the N basic network units are divided into k clusters, the basic units in the same cluster are interconnected through the top-of-rack optical switches to form a hyper-cubic topological structure, and the basic units in different clusters are interconnected through the top-of-rack optical switches to form an annular topological structure; and packet switching is adopted in the communication of the server of the same basic unit, and multi-wavelength-based optical circuit switching is adopted in the communication of the servers of different basic units. By using the optical interconnection network system and the communication method, the port number of the optical switches and network blockage conditions can be effectively reduced, the expandability of a network can be ensured, and the throughput and the performance of the network can be improved.

Asynchronous optical data is aligned with synchronous convergence points in an optical packet switching system. The convergence points can be any place where data enters an optical packet switching element, buffer stage, switch fabric, etc. The arrival time for data approaching the convergence point is compared with a reference signal associated with the upcoming convergence point. The comparison is used to identify the amount of time-shift required to align the approaching data with the reference signal. Control information is derived according to the comparison and used to control an optical data aligner that synchronizes the data with the convergence point.

The invention discloses an optical interconnection network system and communication method in a supercomputer. The system disclosed by the invention comprises global optical switches, array electric switches and electric routers, wherein every 8 electric routers are interconnected to form a cube-like calculation cluster, and c calculation clusters can form a supercomputing node; k supercomputing nodes, 8 array electric switches and one global optical switch form a supercomputing array; and M supercomputing arrays are fully interconnected to form a network system. According to the system disclosed by the invention, the communication among the global optical switches, the array electric switches and the electric routers can be achieved by adopting two switching mechanisms which are electric packet switching and optical circuit switching; and according to the optical interconnection network system and communication method disclosed by the invention, relatively high network extensibility can be achieved, the utilization rate of links can be increased, different switching mechanisms can be supported, and the congestion of the network can be reduced.

An optical packet switching device is provided with: a first input unit and a second input unit for receiving an optical packet signal having destination information and priority information; a first demultiplexer and a second demultiplexer for branching the optical packet signal; an optical switch unit for routing one of branched optical packet signals; a first analyzer unit and a second analyzer unit for analyzing the header of the other branched optical packet signal so as to detect the destination information and the priority information; and an output competition determination unit for checking for temporal competition of a plurality of optical packet signals based on destination information and for determining whether the optical packet signals should be transmitted or discarded based on priority information when there is competition.

A Wavelength Division Multiplexing (WDM) multi-mode switching system and method and method provides concurrent switching in various switching modes including, but not limited to, an electronic packet switching (EPS) mode, optical circuit switching (OCS) mode, and optical burst switching (OBS) mode. Edge routers in the WDM multi-mode switching systems may provide a traffic management module that processes incoming data and routes the data for transmission in an electronic packet switching (EPS), optical burst switching (OBS), or optical circuit switching (OCS) modes via a WDM link.

A method is provided for improving performance of a distributed computing task being executed by computing devices interconnected by an optical switching fabric. Traffic flows between a plurality of nodes of a MapReduce application using an interconnected optical switching fabric are monitored. One or more optimizations for the interconnected optical switching fabric are determined based on the monitoring of the traffic flows. The interconnected optical switching fabric is reconfigured to implement the one or more determined optimizations.

An optical reconfigurable service ring (RSR) architecture based on a RSR channel and WDM channel plan matrix, and method for operation in a fiber network that provides WDM wavelength networking functionalities such as provisional wavelength services, optical circuit switching, optical layer 2 packet switching, optical storage switching, and optical layer 3 packet routing, are proposed. In one embodiment, sixteen wavelength are dynamically switching, routed, or distributed among five optical add/drop nodes using narrowly wavelength tunable transmitters and fixed optical add/drop multiplexer modules.

The present invention relates to a projection display optical system, including a light source, an optical circuit switching device and a prism group. the prism group is placed between the optical circuit switching device and a projection device; andon the optical circuit switching device a microreflector array formed from several microreflectors is inclued; at least two gaps are formed by said prism group, so that the light entered into the prism group can produce total reflection at the interface position of first prism and gap, then is entered into the optical circuit switching device. Said invention also provides the working principle of said optical system and projection method of said projection device.

The invention discloses an optical on-chip network system of non-blocking communication and a communication method thereof and mainly solves the blocking problem of the existing optical on-chip network system. The optical on-chip network system comprises a light transmission network and an electric control network; each node in the light transmission network comprises an IP (Internet Protocol) core, a sending unit, a receiving unit and a light exchanging device, wherein the sending length of each sending unit is fixed and the light exchanging device is formed by light vertical switches; and the inner structures of all the receiving units are the same. The communication method comprises the following steps of: firstly, establishing a two-dimensional coordinate system for the light transmission network and reading coordinates of a source node and a target node; secondly, opening a needed micro-ring resonator by the electric control network according to the source node and the target node; and finally, transmitting the light information to the target node by the light transmission network to be processed, and closing the opened micro-ring resonator. The optical on-chip network system disclosed by the invention combines a wavelength division multiplexing technology, a space division multiplexing technology and a light circuit exchanging technology to realize the non-blocking communication of the IP cores and improve the resource utilization rate and the throughput performance of the network.

The invention pertains to a data transmission method in the optical network communication technology. The invention organically combines optical circuit switching (OCS) and optical burst switching (OBS) based on the original physical topological network, reserves wavelength in each physical link to establish an overflow transmission light path, transmits the discarded data packets of the original OBS due to booking collision into the light path to transmit continuously, accordingly resolving the problem of packet loss due to one time booking collision; most of the data packets in the network operation adopts an OCS mode transmission, and adopts an OBS mode overflow transmission light path to transmit the data packets to destination nodes when the data conveying capacity has a high a burst performance; and can switch back to the OCS mode transmission when the OCS light path is smooth, accordingly can flexibly adjust the transmission modes according to the current state of network and significantly reduce the packet loss rate. The present invention thus not only has high efficiency of OCS but also has flexibility of OBS, and has features of strong transmission capability and adaptability to burst data streams, rapid network transmission, high reliability, no additional optical devices and the like.

The invention discloses an all-optical time slice switching method based on time synchronization. According to the method, continuous service data streams in an optical network are assembled to periodically-repeated optical time slices in a segmented mode in a time domain and are transferred in an asynchronous transfer mode. Network nodes obtain high precision synchronization time through whole network time, an optical switch is controlled to switch optical time slices reaching at precise time points periodically to a target port, and therefore full optical switching is completed. When a connection request reaches, available routes, wavelengths and occupation time slots are calculated through source nodes according to network available time slot resource information, and are reserved through a connection management module. After resource reservation is finished, the source nodes send out optical time slices of bearer service periodically at reserved time slots. Destination nodes restore received optical time slices to original service steams. Compared with an existing switching technology, the all-optical time slice switching method has the remarkable advantages that reliable and flexible sub-wavelength granularity all-optical switching can be achieved without participation of all-optical caches and all-optical logic devices.

An optical circuit switching matrix includes a plurality of optical ports, each optical port being optically coupled to a respective one of a plurality of user nodes and an optical coupler having at least one input port optically coupled to the plurality of optical ports, and an output port. The optical circuit switching matrix also includes a wavelength demultiplexer having an input optically coupled to the output port of the optical coupler, and a plurality of output ports, each output port being optically coupled to a respective one of the plurality of optical ports.

An optical packet switching system includes: an optical packet transmitter device configured to transmit an optical packet signal; and an optical packet switching device configured to route and output an input optical packet signal. The optical packet transmitter device is configured to adjust gap time between optical packets transmitted. The optical packet transmitter device adjusts the gap time to a fixed value defined by time required for switching in the optical packet switching device.