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Optical Communications > Fault Recovery > Bypass Inoperative Element > Spare Channel Or Standby Optical Fiber

Spare Channel Or Standby Optical Fiber

Spare Channel Or Standby Optical Fiber patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

07/17/14 - 20140199061 - Determination device and determination method
A determination device for a wavelength division multiplex communication system, configured to set each of different paths each of which is formed by connection of spans each of which is a zone between two adjacent transmission devices, among transmission devices forming a communication network, in the communication network, or a...

07/17/14 - 20140199062 - Protection for fibre optic access networks
An Optical Network Unit, ONU, and an Optical Line Terminal, OLT, as well as a respective method therein, are provided for enabling the ONU to communicate with the OLT. The ONU and at least one OLT are comprised in a passive fibre optic access network. The passive fibre optic access...

06/19/14 - 20140169782 - Network design apparatus and network design method
A network design apparatus includes: a first processing unit configured to select one or more paths between nodes in response to a request for a bandwidth between pairs of nodes in a network to determine working communication routes and protecting communication routes connecting the pairs of nodes, and estimate a...

06/12/14 - 20140161437 - Apparatus and method for switching a communication path
An apparatus serves as a node in a network on which plural working paths and plural protection paths for bypassing the plural working paths are set, where the plural protection paths share bandwidths allocated thereto. The apparatus includes a data plane unit functioning as an interface that transmits and receives...

06/12/14 - 20140161438 - Protection for distributed radio access networks
The invention relates to a distributed radio access network communicatively coupled to a core network, and a method for upholding a service in case of a failure in the distributed radio access network. The distributed radio access network comprises a main radio equipment controller communicatively coupled to at least one...

05/29/14 - 20140147106 - Rapid recovery in packet and optical networks
A node may determine a failure in a first path for routing first optical network traffic between a first set of networking devices, where the first path includes a first set of optical transport nodes. The node may determine a second path for routing the first optical network traffic between...

05/08/14 - 20140126899 - Mesh restoration and bandwidth allocation systems and methods for shared risk connection groups
A method, a node, and a network include mesh restoration and bandwidth allocation systems and methods for shared risk connection groups for source-based routing control planes. The mesh restoration and bandwidth allocation systems and methods utilize signaling from a node closest to a point of failure to “advise” source nodes...

04/24/14 - 20140112654 - Optical line transmission protection system and method
The present invention discloses an optical line transmission protection system and method. In which, the optical line transmission protection system includes: at least one stage of optical line protection segment having a transmitting end provided with a Tunable Optical Divide Module (TOD), and a receiving end provided with an OSW;...

04/17/14 - 20140105593 - Light module interlock system
Described is a light module interlock system comprising: an optical cable enabled to transmit light of a first wavelength and a second wavelength different than the first wavelength; a first light module enabled to provide the first wavelength to the optical cable; a second light module enabled to provide the...

04/10/14 - 20140099097 - Troubleshooting method, aggregation node, and optical network protection system
Embodiments of the present invention disclose a troubleshooting method. The method includes: determining, by an aggregation node when a link fault or a device fault occurs on an OLT side, an active logical port used by the active OLT to forward a data packet; searching, by the aggregation node, a...

04/03/14 - 20140093232 - Method for protection of multi-wavelength passive optical network
An Optical Line Termination (OLT) system in a multi-wavelength Passive Optical Network (PON) includes a protection port for protecting a set of OLT ports without the use of a physical switch. The protection port has a tunable transceiver. The OLT system detects a failure of one of the OLT ports,...

03/27/14 - 20140086572 - Transmission apparatus and processing method thereof
A transmission apparatus includes a package that has a plurality of slots into each of which a board can be freely detachably inserted; at least one control board; a PWE interface communication unit that is connected to the control board, converts an input SDH or PDH signal to a packet...

03/13/14 - 20140072295 - Communication system and optical transmission device
In a normal operation, line cards LCm1 and LCm2 set transmit ports TXu of user ports UPm1 and UPm2 into an open state, and line cards LCs1 and LCs2 set transmit ports TXu of user ports UPs1 and UPs2 into a blocking state. Here, for example, if a failure occurs...

03/06/14 - 20140064721 - Single fiber bi-directional optical module, and transport system and method based thereon
Embodiments of the present invention include a single fiber bi-directional optical module, and a transport system and method based thereon. The single fiber bi-directional optical module includes a self-search circuit respectively connected to a transmission selection circuit and a receiving selection circuit. The self-search circuit is configured to search for...

01/16/14 - 20140016924 - Procedure and system for optical network survival against multiple failures
The system is arranged for pre-calculating a set of recovery paths for each working path and simultaneously using them to recover a working path failure, and is apt for implementing the procedure....

01/16/14 - 20140016925 - Resizing a path in a connection-oriented network
An existing path in a connection-oriented network requires resizing from a first size to a second size. Nodes exchange control plane signalling with other nodes which advertises available resources on links between nodes. A node on the existing path receives a request to establish a path capable of being resized...

11/28/13 - 20130315579 - Method and system for providing a shared demarcation point to monitor network performance
An approach for detecting an error associated with a routing network coupled to a transport network comprising a plurality of optical communication nodes, switching, by an optical communication node, to a troubleshooting channel associated with the transport network using one or more router counterpart cards, and troubleshooting the error using...

11/28/13 - 20130315580 - Software defined networking photonic routing systems and methods
A network includes a plurality of interconnected nodes utilizing an all-broadcast architecture for a plurality of wavelengths therebetween; a routing protocol configured to compute a loop-free path through the plurality of interconnected nodes, wherein the loop-free path is computed for at least one wavelength of the plurality of wavelengths using...

10/31/13 - 20130287389 - Fiber channel 1:n redundancy
Network devices, systems, and methods, including executable instructions and/or logic thereon to achieve fiber channel one for N (1:N) redundancy. A network device includes a processing resource coupled to a memory. The memory includes program instructions executed by the processing resource to group a number of switches in a 1:N...

10/17/13 - 20130272693 - System and method for shared mesh restoration in optical networks
A method for shared mesh restoration includes configuring a switch to allow sharing of a plurality of backup line cards across a plurality of node degrees associated with a reconfigurable optical add/drop multiplexer (ROADM). The switch is communicatively coupled to the ROADM. The method further includes configuring a number of...

10/10/13 - 20130266306 - Time synchronization method for communication system, slave station apparatus, master station apparatus, control device, and program
A time synchronization method for a communication system configured to perform protection switching, the communication system including a first network in which a master station and a slave station are connected via plural physical lines including a working line and a backup line and a second network connected to the...

10/03/13 - 20130259466 - Arrangement at a remote node, a remote node, a central office and respective methods therein for supervision of a wavelength division multiplexed passive optical network
An arrangement at a Remote Node, a Remote Node, a Central Office, a WDM-PON and a method in an arrangement at a Remote Node, and a method in a Central Office are provided for supervision of the WDM-PON. The arrangement comprises at least one filter connected to the feeder fibre...

10/03/13 - 20130259467 - Communications network
A passive optical network is provided which uses existing GPON OAM functionality and standard routing protocol messages to solve the downstream routing problem between an access service provider and one or more other communication provider networks....

09/19/13 - 20130243416 - Optical network architecture for transporting wdm traffic
A peer network node, along with other peer network nodes, forms a higher-tiered optical network that transports wavelength division multiplexed traffic for multiple lower-tiered optical networks. The node comprises a plurality of dedicated bidirectional optical ports, including two or more lower-tiered ports and one or more peer ports. The node...

09/19/13 - 20130243417 - Method and apparatus for protection switching in optical transport network
A node of an optical transport network system transmits optical wavelengths to an adjacent node through an operational line. An apparatus for protection switching of the optical transport network system transmits only an optical channel with a fault among a plurality of optical channels composed of flexible optical channel data...

09/19/13 - 20130243418 - Fiber protection and power save with security
A current embodiment is a system and method for Passive Optical Networks (PON) providing integration (cross-correlation) of powersave and fiber protection, optionally with encryption....

09/19/13 - 20130243419 - Comprehensive end-to-end storage area network (san) application transport service
Disclosed is a method and system for transmitting data on a data channel from a source to a destination. The data channel has a plurality of wavelength channels and a throughput. The system and method include a storage application for multicasting data on each of the plurality of wavelength channels,...

09/05/13 - 20130230310 - Self-healing repeater node
A device may include a component, a first switch, a repeater, and a second switch. The component may configure optical paths between ports. The component may comprise a first pair of optical ports connected to a first pair of optical fibers, and a second pair of optical ports connected to...

08/22/13 - 20130216216 - Optical network node with restoration path
A node for an optical network has an electrical selector (30, 35) coupled to a first transponder for selecting which of first or second connections, is carried. A connection controller (80, 130) cooperates with other nodes to set up the first connection on a main path using a second transponder,...

08/08/13 - 20130202286 - Ethernet passive optical network over coaxial (epoc) protection switching
Protection switching methods, systems, and architectures are provided for hybrid Ethernet Passive Optical Network (EPON)-Ethernet Passive Optical Network Over Coaxial (EPOC) networks. Protection switching embodiments enable protection of the EPON portion and/or the EPOC portion of the hybrid network. In embodiments, protection switching may be initiated by an Optical Line...

07/25/13 - 20130188946 - System for redundancy in ethernet passive optical networks (epons)
A system for redundancy in Ethernet passive optical networks (EPONs) facilitates fast recovery from failure (less than 50 msec), path redundancy of the fiber optic network, and location redundancy of the OLTs. An optical networking unit (ONU) in a normal state monitors input communications, and when the input communications are...

07/11/13 - 20130177305 - Optical communication network path restoration
A method and system of determining a new path through an optical network from a source node to a destination node when a link in an original path fails are disclosed. When a fault on a link is detected, adjoint weights are assigned to each operational link for each node...

07/04/13 - 20130170825 - Solution for hitless protection in high-speed otn framer and front-end
In an optical communication system containing a primary line and backup line card, a method includes providing interfaces for the primary and backup line card, each line card including a transmitter and receiver; and selecting output from the transmitter from either the primary or back up line card including selecting...

06/27/13 - 20130163983 - Signaling protocol for multi-domain optical networks
A three-way handshake method for optical messaging in a multi-domain optical network that includes a first pass from a source domain to a destination domain through intermediate domains on candidate working paths, collecting information identifying available routing resources for each working path, calculating a working path metric and storing each...

06/27/13 - 20130163984 - Fiber optic wall plate with redundancy system
An optical splitter/coupler may be disposed at a subscriber network access location to provide primary and back-up service to the subscriber network access location. The optical splitter/coupler includes first and second optical fibers that are optically coupled to a third optical fiber. The first and second optical fibers of the...

06/20/13 - 20130156417 - Optical fiber transmission switching device and control method thereof
An optical fiber transmission switching device includes a first transmission port; a second transmission port; a terminal-end input port; a terminal-end output port; a first and a second optical module respectively including an electrical input port, an electrical output port, and a bi-directional optical port, wherein the two bi-directional optical...

05/23/13 - 20130129341 - Wireless communications links
A wireless communications link comprising an RF link and a free space optics (FSO) link, a switch, an RF signal monitoring apparatus, an optical signal monitoring apparatus, alarm apparatus and a controller. The switch operates in a normal mode to aggregate the links to form a link aggregation group and...

05/23/13 - 20130129342 - Optical safety implementation in protection switching modules
Optical safety functions are incorporated into protection switching modules which maintain redundant pathways to avoid interruptions in optical network connections. The optical safety functions which lower optical power levels upon interruptions of optical connections are effectively combined with protection switching procedures which are also triggered by interruptions in optical network...

05/16/13 - 20130121684 - Apparatus and method for providing protection in a passive optical network
An apparatus and method for cost-effectively providing protection in a PON. Protection ports, usually on a protection LT card, are configured to communicate with a selectable one of the downstream ODN splitter/combiners associated with the primary ports on the remaining LT cards of the OLT. Each protection port includes at...

05/09/13 - 20130114953 - Optical transport network port protection systems and methods using flexible switch criteria
The present disclosure provides Optical Transport Network (OTN) port protection systems and methods using flexible switch criteria. Specifically, the OTN port protection systems and methods provide linear protection in OTN such as 1+1 Protection with Automatic Protection Switching (APS) and/or 1+1 Subnetwork Connection Protection (SNCP) Protection. The OTN Port Protection...

03/28/13 - 20130077960 - Utilizing optical bypass links in a communication network
Optical By-Pass (OBP) links may be created by adding wavelengths between nodes on the network. The OBP may extend between any pair of nodes on the network. Intermediate nodes on the OBP are transient nodes and simply forward traffic optically. An OBP extends between a pair of nodes and, unlike...

01/31/13 - 20130028592 - Apparatus and method for switching paths in a wavelength-multiplexing network
An apparatus switches paths in a wavelength-multiplexing network in which a first number of wavelengths each used for a path to transmit an optical signal are multiplexed into an optical fiber. The apparatus includes an entire switching unit and a second number of individual switching units where the second number...

12/27/12 - 20120328282 - Network restoration under link or node failure using preconfigured virtual cycles
The design of telecommunication networks is such that there is provision of end-to-end path protection to multiple demands under a single link or node failure in the networks. Restoration routes are provided on Preconfigured Virtual Cycles (PVC's), where each demand is assigned one restoration route and specific restoration wavelengths on...

12/20/12 - 20120321296 - Light path characterization, traffic protection, and wavelength defragmentation
A method for managing an optical network having a plurality of nodes interconnected by a plurality of fiber links includes installing one or more active reconfigurable optical add/drop multiplexer (ROADM) cards into a node and installing a spare ROADM card into the node. The one or more active ROADM cards...

12/06/12 - 20120308224 - Standby restoration signaling for optical networks
Systems and methods are described that provide a distributed restoration signaling protocol for shared mesh restoration with standbys for transparent optical networks....

11/22/12 - 20120294604 - Optical protection and switch enabled optical repeating
An optical transmission system or its constituent repeater disposed optically between two terminals. The system includes at least two parallel optical paths between a first node and the repeater (one optical path being used as a backup for another), and another at least two parallel optical paths between a second...

11/08/12 - 20120281978 - Protection system, method and apparatus for optical network
The invention discloses a system, a method and an apparatus for optical network protection. The system includes: an output control apparatus for obtaining protection mode information configured by a system and controlling an input signal to be output from a set line corresponding to said protection mode information; and a...

10/18/12 - 20120263453 - Method for supporting sncp over packet network
A method is presented for supporting SNCP over a packet network connecting to two SDH sub-networks and transporting one or more SDH paths that are SNCP-protected in both SDH sub-networks. The packet network connects to each of two sub-network interconnection points by a working path and a protection path. The...

10/11/12 - 20120257886 - Method and device for implementing shared mesh protection and optical network system
Embodiments of the present invention disclose a method for implementing shared mesh protection includes: receiving, by a first node, a message of a second type sent by a second node, where the message of the second type carries a second positive incoming sublabel allocated by the second node for a...

10/04/12 - 20120251097 - Passive architectural optical distribution network
Passive optical networks can experience faults that are unrecoverable. An embodiments of the present invention is a hybrid passive optical network configured to protect a primary optical path employing a switch to transmit data from the primary path to a secondary path in a passive manner. In an event data...

09/20/12 - 20120237200 - Method and system for increasing transponder sharing for mesh restoration in a communication network
In accordance with embodiments of the present disclosure, a method may include for each particular working demand in a communication network, calculating a dedicated backup path for a working path of the particular working demand such that each particular backup path does not include links present in the working path....