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| Number | Title | Issue Date |
| 8160441 | Optical fiber access network and commuication protection method thereof The present invention relates to an optical fiber access network and a communication protection method thereof. The optical fiber access network comprises an optical fiber communication system, a wireless communication system, a communication service switch device, ... | 04/17/2012 |
| 8155516 | Apparatus and method for ensuring continuity of fiber optic In a fiber-optic communications system, a backup or redundant optical link is provided at the central office in parallel with the primary one in use. Parameters associated with the backup link, including its signal delay, its attenuation, etc. are stored at the time... | 04/10/2012 |
| 8150257 | Shared mesh restoration with pre-configured standby lightpaths Systems and methods are described for restoring wavelength services in mesh networks using pre-configured, standby lightpaths. The standby lightpaths are pre-cross-connected lightpaths that provide connectivity between switching nodes having a fiber link of degree-2... | 04/03/2012 |
| 8135273 | Systems and methods of optical path protection for distributed antenna systems Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a method is provided. The method comprises receiving an electrical uplink radio frequency signal; generating an uplink optical signal derived from the el... | 03/13/2012 |
| 8103162 | Channel protection for multi-channel optical transmission system and method An optoelectronic integrated apparatus, including a plurality of working optical source links, at least one spare optical source link, at least one spare data channel, and a protection control unit for detecting whether there is any working optical source link fault... | 01/24/2012 |
| 8090257 | Optical communication system, optical communication apparatus, and method of monitoring fault alarm in path section detour The optical communication system of the present invention is constructed with a data plane and a control plane, and includes a first monitor for monitoring a path alarm on the data plane, a second monitor for monitoring a path alarm on the control plane, and an alar... | 01/03/2012 |
| 8064763 | Optical transmission systems, devices, and methods An optical system with a first and second network tiers. The first network tier includes a plurality of major nodes optically interconnected by at least one transmission path. The second network tier includes a plurality of minor nodes disposed along the transmissio... | 11/22/2011 |
| 8041210 | Parallel high-speed communication links with redundant channel architectures An optical transmission system includes more optical channels than electrical channels. If an optical channel is not functioning, the signals may be diverted to another optical channel since there are more optical channels than electrical channels. Embodiments of th... | 10/18/2011 |
| 8019217 | Storage system and optical module switching method for storage system An object of the present invention is to continue to send and receive to/from a host when a failure has occurred in a storage device interface. A storage system includes a host and a storage device connected to the host via a communication line, wherein the storage ... | 09/13/2011 |
| 8005357 | Optical transmission apparatus An optical transmission apparatus includes redundant line cards each installed with hardware and a CPU. The hardware obtains failure information on redundant lines including a working line and a protection line, and the CPU determines switching control of the redund... | 08/23/2011 |
| 7995914 | Method and system for providing fault recovery using composite transport groups An approach is provided for performing fault recovery using composite transport groups (CTGs). A first logical channel is established within a composite transport group, wherein the first logical channel is established over a first link associated with a first servi... | 08/09/2011 |
| 7965938 | Method for mesh optical network service restoration This invention discloses a method for mesh restoration, which includes the steps of: a) reserving channel resource for restoration path in the link by which the path passes and assigning discriminator for each channel, and determining the associated signaling channe... | 06/21/2011 |
| 7936990 | Method and node apparatus for traffic protection in optical transport network Disclosed is a method and node apparatus for traffic protection of Optical Transport Network (OTN), including: setting a part of channels in one fiber as working channels used for carrying traffic in need of protection, and setting a part of channels in the other fi... | 05/03/2011 |
| 7903968 | Optical network transmission channel failover switching device An optical network transmission channel failover switching device is proposed, which is designed for use in conjunction with an optical network for providing a transmission channel failover switching function, which is characterized by the provision of a two-to-two ... | 03/08/2011 |
| 7877008 | WDM layer-based optical chanel protecting device and method thereof The present invention discloses a WDM layer-based OChP device and the method thereof, i.e., M protection channels are added in the transmitting module and the receiving module to connect to receiving ends and transmitting ends of M protection channels in the WDM sys... | 01/25/2011 |
| 7848643 | Communication recovering system for wavelength division multiplexed passive optical network A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON) includes a central office and remote nodes. When there is a fault in an optical fiber connecting a first blue/red band coupler to a blue/red band coupler R11... | 12/07/2010 |
| 7848642 | Method and apparatus for capacity-efficient restoration in an optical communication system A method and system provide capacity-efficient restoration within an optical fiber communication system. The system includes a plurality of nodes each interconnected by optical fibers. Each optical fiber connection between nodes includes at least three channel group... | 12/07/2010 |
| 7831145 | Passive optical network system and method for protecting the services of the same The present disclosure provides a passive optical network (PON) system and a method for protecting the service of the system for service recovery and fault locating in case of a failure of the network, wherein the PON system comprises an optical line terminal (OLT),... | 11/09/2010 |
| 7805073 | Systems and methods of optical path protection for distributed antenna systems Systems and methods for optical path protection for distributed antenna systems are provided. In one embodiment, a method is provided. The method comprises receiving an electrical uplink radio frequency signal; generating an uplink optical signal derived from the el... | 09/28/2010 |
| 7801442 | Redundant channel implementation to extend optical transceiver lifetime and reliability Embodiments introduce redundant optical channels to significantly extend the lifetime of parallel optical transceivers. A plurality of transmitters, N, transmit on a plurality of optical channels, where N is an integer number of optical channels greater than 1. One ... | 09/21/2010 |
| 7787764 | Optical network transmission channel failover switching device An optical network transmission channel failover switching device is proposed, which is designed for use in conjunction with an optical network for providing a transmission channel failover switching function, which is characterized by the provision of a pair of two... | 08/31/2010 |
| 7769290 | Optical transmission systems, devices, and methods An optical system with a first and second network tiers. The first network tier includes a plurality of major nodes optically interconnected by at least one transmission path. The second network tier includes a plurality of minor nodes disposed along the transmissio... | 08/03/2010 |
| 7751705 | Optical channel intelligently shared protection ring An optical ring network has one or more working wavelengths and multiple protection wavelengths adapted to support the working wavelength(s). Routing tables may be used in network nodes to assign traffic of a failed working wavelength to a protection wavelength. The... | 07/06/2010 |
| 7711263 | Fault protection system and method for passive optical network A fault protection method for optical networks is provided. The method includes monitoring intensity of downstream optical signals transmitted through a first route from a rear terminal of a primary optical channel, so as to determine if there occurs any fault; and ... | 05/04/2010 |
| 7657175 | Optical communication device An optical communication device for detecting a defect in a standby optical fiber. An active optical output unit converts an electrical signal to an optical signal, and a standby optical output unit is provided as a substitute for the active optical output unit. An ... | 02/02/2010 |
| 7643751 | Network managing apparatus, optical add/drop multiplexer, and network managing method A network managing apparatus is connected to one of multiple OADM nodes that execute optical communication on an optical ring network configured by a two-line transmission path including of an active line and a backup line. The apparatus includes a storing unit that... | 01/05/2010 |
| 7634194 | Multi-channel protection switching systems and methods for increased reliability and reduced cost The present invention provides multi-channel protection switching systems and methods for increased reliability and reduced cost. Advantageously, the multi-channel protection switching systems and methods of the present invention use pre-FEC rate measurements, and c... | 12/15/2009 |
| 7613392 | 1:N protection in an optical terminal A communication network comprising at least one first terminal, at least one second terminal, a plurality of links, and at least first and second nodes. The first node is bidirectionally coupled to the first terminal through at least a first one of the links, and al... | 11/03/2009 |
| 7613391 | Optical signal switching device for use in an optical protection network An optical network system is provided which has a signal protection function and is able to be constructed of communication nodes manufactured at low costs. An optical signal transceiver has at least one optical signal transmitting device and at least one optical si... | 11/03/2009 |
| 7603033 | Fault tolerant optical data communication network A fiber-optic networking system that can survive a break in the fiber and restore full connectivity to all nodes in the network. The network can detect the presence of a cut in the fiber, locate the cut, recover from the cut, and restore the communication capacity t... | 10/13/2009 |
| 7596313 | Method and apparatus for processing protection switching mechanism in optical channel shared protection rings A method for merging protection switching messages in an optical network enables a control of the amount of message bandwidth used for sending protection switching messages. A method for performing protection switching in an optical network does so in an optimal man... | 09/29/2009 |
| 7590349 | Node device, optical communication network, optical path reserve method and computer-readable medium comprising a program The present invention suppresses an increase of processing time caused by the expansion of network scale, and decreases the probability of occurrence of blocking by reserving optical paths based on the distributed control method, and decreases time to complete the r... | 09/15/2009 |
| 7558477 | Communication recovering system for wavelength division multiplexed passive optical network A communication recovering system for a wavelength division multiplexed passive optical network (WDM PON). The communication recovering system can recover fault of optical fibers between the central office and the remote nodes without additional optical fibers by gr... | 07/07/2009 |
| 7546034 | Circuit arrangement for line protection of optical data transmission The invention relates to a method and an electro-optical circuit arrangement for line protection in a WDM data transmission link comprising at least two selectable optical data transmission lines which can respectively transmit data via n data channels, the change-o... | 06/09/2009 |
| 7536100 | POP-to-POP optical wavelength protection in a communication system A communication system includes an optical network, a first POP, and a second POP. The first POP receives user communications from a first user system and transfers the user communications to the optical network over a first optical wavelength. The optical network t... | 05/19/2009 |
| 7536101 | Communication system with cost based protection A communication system comprises a first communication device coupled to a first optical switch by a first link, a second communication device coupled to a second optical switch by a second link, and a third link and back-up links coupling the first and second optic... | 05/19/2009 |
| 7526197 | Utilizing the protecting bandwidth in a SONET network A system provides more cost and bandwidth efficient utilization of a SONET network having both a Working path and a Protection path by using both communication paths to carry data. A system for communicating data over a Synchronous Optical Network/Synchronous Digita... | 04/28/2009 |
| 7519293 | Optical communication system having ring-based restoration using shared protect links In an optical communication system, optical communications are transferred over a first ring and a second ring. A fault is detected on the first ring or the second ring. If the fault is detected on the first ring, a shared optical protect link is used for ring-based... | 04/14/2009 |
| 7496294 | Optical multi-branch communication system A primary station equipment unit transmits, to a secondary station equipment unit, a message transmission enable signal granting transmission of a PST message from the secondary station equipment unit, when a predetermined period of time defined for transmission ela... | 02/24/2009 |
| 7483629 | Optical transmission systems including optical protection systems, apparatuses and methods Optical transmission systems of the present invention include optical protection systems, apparatuses, and methods that provide increased reliability in the system. The optical system generally includes an optical switch having distinct, cooperating dedicated and sh... | 01/27/2009 |
