52 results about "Optical burst switched" patented technology

A control device for controlling the optical data transmission in an optical burst switching mode between a source computer and a destination computer, the control device being connected to the source computer and to the destination computer and being adapted such that in case of a burst to be transmitted from the source computer to the destination computer, the length of the burst is determined based on a parameter indicating an available buffer size of the destination computer, and a predetermined timeout value parameter indicating a time after which improper burst transmission is assumed to have been occurred. After the burst length is determined and the traffic starts to be accumulated, a proposed burst reservation and transmission scheme, namely random burst eligibility time method, is used to deliver the burst.

An optical network scheduling device (10) including a plurality of schedulers (16) each corresponding to a respective channel in the optical burst switch network and configured to maintain a transmission schedule for the respective channel; and a controller (12) configured to receive a burst transmission request and to select at least one of the schedulers as a selected scheduler schedule a burst transmission.

The invention discloses a poll continuous multicast protocol based on repeating confirmation mechanism in light mutation exchange rig net. It supports reliable service, acquires the reliability through retransmitting and confirmation mechanism; the dispatcher processes the multicast queue with poll mode; when there has several data packet reaches the target joint, the target joint selects one to receive from the several data packet; if the joint can not receive the mutation packet to be signed, one or several joints in the multicast addresses does not receive the data packet transmitted from the source joint, the source joint retransmits the data packet, guarantees all the joints received the data. The method decreases the complexity of protocol, and the protocol is simplified through the smallest control.

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 Fiber Channel Frames. Data transmitted via the PBS network is converted into PBS frames having encapsulated Fiber Channel Frames. The schemes also support interfaces with legacy networks, such as LANs and WANs.

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 is an unique control method that maintains the bandwidth efficiency of Optical Burst Switched, Labeled Optical Burst Switched, and other burst or packet switched networks. The invention also combines in a novel manner the delayed Reserve-a-Fixed-Duration (RFD) class of switching techniques and special classes of slow Switching Elements.

The present invention proposes a method to control congestion in an Optical Burst Switched (OBS) network. The method consists in dropping probabilistically a data burst based on an average delay applied to a set of data bursts. Data bursts start being preventively dropped when the average delay goes beyond a pre-determined threshold. <??>At the edge of the OBS network, one may further segregate data packets into 2 distinct flows, depending on whether or not they convey congestion responsive traffic, each flow being next aggregated into distinct data bursts. The content type of a data burst is indicated in some field of the burst header packet (BHP), allowing the core routers downwards to selectively drop data bursts.

Provided is a method for transmitting a burst in an optical burst switching system, in which when a burst is generated at an originating node, a burst control packet is transmitted to a destination node by way of a plurality of nodes and then a data burst is transmitted after a pre-allocated offset time. The method includes the steps of obtaining an arrival time of data bursts that survive competition to occupy an output channel among data bursts transmitted to the next node by way of the current node using offset time information in burst control packets for the survived data bursts, checking whether an empty void is present between the survived data bursts by using the obtained arrival time of the survived data bursts, and generating a new data burst originating from the current node, inserting the newly generated data burst into the checked empty void, and transmitting to the next node. This method can improve channel utilization and maximize performance of the optical burst switching system.

A system and method for a cell switching optical network. A block of data is buffered at an edge node and sliced into data slices. Slice headers are pre-appended to each data slice. The data slices are then scheduled for transmission onto an optical switching network during fixed time slots defined on a per carrier wavelength basis.

The invention is an unique control method that maintains the bandwidth efficiency of Optical Burst Switched, Labeled Optical Burst Switched, and other burst or packet switched networks. The invention also combines in a novel manner the delayed Reserve-a-Fixed-Duration (RFD) class of switching techniques and special classes of slow Switching Elements.

A multiple-plane OBS node comprises N input ports, N 1×N switches, N switching planes, N2 FDLs, N optical couplers, and N output ports, each input port is connected with the input of a corresponding 1×N switches, the N outputs of each 1×N switch are connected with a corresponding input of each switching plane respectively, a corresponding output of each switching plane is connected with the input of the same corresponding optical coupler via a respective FDL, and each output port is connected with the output of a corresponding optical coupler, wherein N is an integer.

A system and method for implementing collision resolution scheduling of satellite optical burst switch. According to the topology of space-based broadband transmission backbone network and the statusof each switching node, through the scheduling method of network resources pre-allocation, at that boundary of the space-based broadband transmission backbone network, the data to be transmitted and exchanged to the space-based broadband transmission backbone network is controlled, the switching time and the forwarding path of each optical burst data entering into the space-based broadband transmission backbone network are planned in advance, and the collision resolution scheduling of the optical burst data exchange of the space-based broadband transmission backbone network is realized. The optical burst data of the space-based broadband transmission backbone network is generated by the electric domain. After completing the electro-optical conversion at the edge node of the backbone network, the optical burst data enters the backbone network for optical burst exchange. After reaching the destination edge node, the optical burst data is converted, and then the data is sent to the processing terminal to complete the data routing exchange process. Through pre-planning and scheduling, the system can resolve the collision of satellite optical burst switch by using network resources.

An optical burst switching (OBS) system and a method using duplicate optical burst transmission is provided. In accordance with the present invention, optical bursts do not have the same priority when the duplicate optical bursts are transmitted in an OBS network so that a burst loss rate due to blocking can be reduced. Optical bursts do not have the same priority when the duplicate optical bursts are transmitted in an OBS network, so that a burst loss rate due to the blocking can be reduced. After an optical burst control packet is transmitted on a signal channel using a unidirectional reservation manner in the OBS, a problem such as optical burst loss due to the blocking can be prevented even when the optical burst is transmitted on a data channel after an offset time is elapsed without any response messages.