| Patent Number |
Title Of Patent |
Date Issued |
| 7444426 |
Method for selecting a resource to provide a requested service in a multicasting environment |
October 28, 2008 |
| A method is provided for selecting a resource from a plurality of potential resources in order to provide a service in response to a service request. The method comprises the following steps. Aging services are determined by estimating which of the resources are likely to become avai |
| 7443888 |
Transparent sub-wavelength network |
October 28, 2008 |
| An arrangement that allows transmission of client signals with higher clock fidelity is achieved by developing a phase offset measure at an ingress node, communicating it to the egress node, and recovering the client's clock from the received data and from the received phase-offset i |
| 7437469 |
Virtual network element framework and operating system for managing multi-service network equipm |
October 14, 2008 |
| A managed network element is partitioned into one or more virtual network elements. The managed network element may be partitioned based on physical components or services provided by that network element. Each virtual network element is then provided a respective agent to monitor an |
| 7433593 |
Switching algorithm for optical fiber networks |
October 7, 2008 |
| A method, system and egress switching node for maintaining a network connection in an optical network reduces the number of spans needed for reestablishing a network connection. The invention learns which channels are used by the network connection and propagates such channel assignment |
| 7433559 |
Temperature-compensated grating package and method of making the same |
October 7, 2008 |
| A temperature-compensated fiber grating package which provides a temperature dependant stress on a fiber Bragg grating to substantially compensate for temperature dependant variations of the Bragg wavelength. The package includes a base, a fiber grating bonded to the base, and a stru |
| 7428208 |
Multi-service telecommunication switch |
September 23, 2008 |
| Multi-service telecommunication switches which include enhanced component redundancy and which also allow multiple chassis connections to a switching fabric enhance the likelihood that packets transmitted to and from the switch will not be lost due do a particular component failure a |
| 7424223 |
Reconfigurable wavelength blocking apparatus and optical selector device therefore |
September 9, 2008 |
| An optical selector device is disclosed that includes a first arrayed waveguide grating (AWG) demultiplexing an input WDM signal and outputting demultiplexed signals on respective outputs; an array of optical shutters optically coupled to the outputs from the first AWG; a second AWG |
| 7424030 |
Method, system and storage medium for providing a cross connect user interface |
September 9, 2008 |
| A user interface for managing connections in a communication network cross connect. The user interface provides for creation, viewing and removing connections in the cross connect. When displaying connections, a granularity may be adjusted to allow for effective viewing of connections |
| 7423455 |
Systems and methods for A 5:1 multiplexer with a one-fifth ratio duty cycle clock |
September 9, 2008 |
| The present invention provides methods and systems for multiplexing five channels, such as 10 Gb/s to 50 Gb/s, into a single data sequence using a 5:1 multiplexer using a 1/5.sup.th ratio duty cycle clock. The 1/5.sup.th ratio duty cycle clock is a clock with a period equal to the channe |
| 7417950 |
Method and apparatus for performing data flow ingress/egress admission control in a provider net |
August 26, 2008 |
| A method, apparatus and network for transporting layer-2 frames, such as Ethernet MAC, ATM AAL5, and Frame Relay, over MPLS, SONET/SDH, or OTN optical transport networks as well as electrical transport networks is disclosed. The method establishes "pseudo-wires" between, for example, |
| 7415208 |
Method and system for allocating bandwidth in an optical communication network |
August 19, 2008 |
| A method and system for allocating bandwidth in a communication network is disclosed. Processing a request for bandwidth includes evaluating potential paths. Configuration rules and propagation rules may be applied to eliminate non-viable paths. A path quality indicator for remaining |
| 7415174 |
Dual optical channel monitor assembly and associated methods of manufacture and use |
August 19, 2008 |
| An optical channel monitor assembly for simultaneously measuring the optical power levels of multiple series of dense wavelength division multiplexed channels or the like traveling on separate optical fibers in an optical communications system includes an arrayed waveguide grating ro |
| 7414985 |
Link aggregation |
August 19, 2008 |
| A method and system for aggregating a plurality of parallel communications links transmitting data between adjacent nodes in a network is provided. The method simplifies network topology by replacing multiple parallel communications links between nodes in the network with a single ag |
| 7408702 |
Bidirectional optical amplifier |
August 5, 2008 |
| A bidirectional amplification system and method are disclosed. A single optical line amplifier and isolation loss filters are used to amplify signals in both the east and west directions with sufficient gain along a fiber. |
| 7400835 |
WDM system having chromatic dispersion precompensation |
July 15, 2008 |
| Chromatic dispersion in a high speed CS-RZ WDM transmission system is reduced by providing tailored "precompensation" for individual and/or groups of optical signals. Such precompensation is achieved by passing the optical signals through a dispersion compensating elements, such as d |
| 7400443 |
Method and apparatus for optical amplifying device gain control with gain threshold |
July 15, 2008 |
| Optical amplifying method and apparatus are proposed. Constant gain amplifiers operate such that the output power of the amplifier generally tracks the input power. However, optical systems are not perfect and the input to the optical amplifier stage includes not only the desired sig |
| 7391792 |
Data mapper and method for flexible mapping of control and data information within a SONET paylo |
June 24, 2008 |
| A digital information mapper and method for mapping sequences of information characters into a SONET (synchronous optical network) payload in such a manner that there can be an arbitrary mixture of control and/or data values in those sequences. Each information character comprises 9 |
| 7391720 |
Local span mesh restoration (LSMR) |
June 24, 2008 |
| An embodiment of the invention provides a method and apparatus for restoring a connection in a network. The connection is typically a sub network connection (SNC). In an embodiment, a failed line in a link connecting a first node and a second node is detected, where the failed line i |
| 7369780 |
Remodulating channel selectors for WDM optical communication systems |
May 6, 2008 |
| The present invention provides a remodulating channel selector for a wavelength division multiplexed optical communication system. The remodulating selector receives a WDM input signal, selects a particular optical channel from the WDM signal and places the information from the selec |
| 7369566 |
Method and system for DSL power saving |
May 6, 2008 |
| Method and system for reducing power dissipation for data transmission from a transmitter to a receiver in a digital subscriber line (DSL) system when a rate of available data is below a first predetermined data rate for a predetermined length of time. The method includes the followi |
| 7369300 |
Optical amplifier pre-emphasis and equalization method and optical communications system incorpo |
May 6, 2008 |
| The present invention provides an optical amplifier pre-emphasis and equalization method that alleviates the optical amplifier gain ripple penalty experienced in conventional optical communications systems. This method includes storing measured communications channel signal gain ripp |
| 7366193 |
System and method for compensating packet delay variations |
April 29, 2008 |
| A system improves reconstruction of real-time data in a packetized network. The system includes the following elements. A play-out buffer receives packets from the network. A playback element, coupled with the play-out buffer, retrieves packets from the play-out buffer and outputs da |
| 7356529 |
Mechanism for facilitating subscription in a publish/subscribe communication system |
April 8, 2008 |
| An improved inter-module communication facilitation mechanism (CFM) is disclosed, which provides improved scalability, improved efficiency, and enhanced functionality and performance. In one aspect, the CFM enables a subscriber to subscribe to multiple events using a single namespace |
| 7356259 |
Optical bypass upgrade configuration |
April 8, 2008 |
| Optical bypass node upgrade configurations are disclosed: (1) a configuration where optical taps are pre-positioned in wavelength division multiplex (WDM) line systems terminating at optical-electrical-optical (OEO) core switching nodes to allow for future upgrade of the nodes to deg |
| 7353288 |
SONET/SDH payload re-mapping and cross-connect |
April 1, 2008 |
| Multiple frames of SDH framed data are received. Each frame has an overhead portion and a payload portion. The payload portions of multiple frames are identified and extracted. These payloads are switched and re-mapped to a different STM structure as required. |
| 7352780 |
Signaling byte resiliency |
April 1, 2008 |
| A method and system for providing signaling byte resiliency across a telecommunications network. Embodiments of the invention create copies of original signaling bytes and transports the copies in addition to the original signaling bytes. Testing is performed at each node in the netw |
| 7349960 |
Throttling distributed statistical data retrieval in a network device |
March 25, 2008 |
| The present invention provides a method and apparatus for managing distributed statistical data retrieval in a network device. Periodically, statistical data is gathered by processes on one or more remote cards in a network device and transferred to a central process. The statistical |
| 7343101 |
Method and system for reducing crosstalk in an optical communication network |
March 11, 2008 |
| A method of reducing correlation between channels in an optical communication network. A transmission characteristic of first data on a first channel is altered to reduce correlation between the first data and second data on a second channel. The reduction in correlation reduces cros |
| 7343096 |
Method and apparatus for in-service upgrading of OADM to wavelength selective switch of higher d |
March 11, 2008 |
| System and methods for upgrading an optical add-drop multiplexer (OADM) to higher degree wavelength selective router (WSR)/wavelength selective switch (WSS) are disclosed. For example, an OADM of degree-2 may be provisioned for upgrades to degree-3 and higher. The existing links power |
| 7342712 |
Filters, including optical filters, having equal group delay ripple and minimized phase non-line |
March 11, 2008 |
| The present invention provides an optical telecommunications network that includes at least one of a filter having equal group delay ripple and minimized phase non-linearity which is formed by the process including limiting at least one of the group delay ripple and the phase non-lin |
| 7333736 |
Method and apparatus for controlling modulator phase alignment in a transmitter of an optical co |
February 19, 2008 |
| A method and apparatus for controlling phase alignment in a modulator of a transmitter in an optical communications system utilizes an RF power signature to tune phase alignment. A portion of the optical signal is tapped and converted to an electrical signal. An electrical band-pass |
| 7330666 |
Method and apparatus for controlling modulator phase alignment in a transmitter of an optical co |
February 12, 2008 |
| A method of controlling phase alignment in a modulator of a transmitter in an optical communications system uses a narrowband optical filter to monitor changes in power spectral density of a modulated output at and around the optical carrier frequency. In one embodiment, a method con |
| 7330652 |
System and method for selecting the placement of optical amplifiers in an optical network |
February 12, 2008 |
| A system and method for selecting optical amplifier placement in an optical network is disclosed. In one embodiment, a design tool is used to configure the optical add/drop multiplexers of each nose. For nodes with more than a small number of nodes there are a large number of possible |
| 7330481 |
Highly channelized port polling in a telecommunications switch |
February 12, 2008 |
| A method of telecommunication network switch port polling enables very highly channelized ports to be polled. A polling engine reads information from at least one of a plurality of poll registers, and each of the plurality of poll registers is associated with a unique identifier. Dep |
| 7330425 |
Method and apparatus for permanent sub-network connections in a communication network |
February 12, 2008 |
| Methods and apparatus implementing and using techniques for creating a permanent sub-network connection in a network of connected nodes. A route including a working path for a permanent sub-network connection is defined in the network from an ingress node to an egress node. A time out |
| 7321590 |
Methods for aggregating cells transported in a bonded group |
January 22, 2008 |
| Transporting an asynchronous transfer mode (ATM) stream through a bonding group involves properly splitting the stream into sub-streams to fit into individual member bearer's bandwidth at the transmit end, and properly merging the sub-streams to reconstruct the stream at the receive end. |
| 7319662 |
Virtual line switched ring |
January 15, 2008 |
| At least one protection line is shared among SONET rings. Identification and availability information of the shared protection line is distributed among the switches of the SONET rings using K-byte data in the SONET overhead. |
| 7317725 |
System and method for implementing combined packetized TDM streams and TDM cross connect functio |
January 8, 2008 |
| Apparatus implements combined packetized time-division multiplexed (TDM) streams and TDM cross connect functions. The apparatus includes an input buffer, a reassembly state machine, a frame buffer, and a segmentation state machine. The frame buffer includes multiple bins for storing cell |
| 7313736 |
Method and apparatus for aggregating alarms and faults of a communications network |
December 25, 2007 |
| A distributed method and system of controlling a communications network having a plurality of spans of interconnected network elements some of which include a network element processor distributes network topology information to respective span databases; stores original fault objects |
| 7310688 |
Relative addressing for network elements |
December 18, 2007 |
| A relative address protocol for communicating message packets along a linear chain network or quasi-linear chain network is disclosed. The protocol includes a relative destination address field that includes a counter having a preselected initial value at a source node. The initial v |
| 7310333 |
Switching control mechanism for supporting reconfiguaration without invoking a rearrangement alg |
December 18, 2007 |
| A method of modeling or constructing a switch element uses an ingress stage with input sorters and input routers; an egress stage with output routers and output sorters; and a center stage interconnecting the ingress and egress stages. Routers are partitioned such that each partition |
| 7310318 |
Method and system for using optical phase conjugation in an optical communications network |
December 18, 2007 |
| A optical communications network including at least one optical phase conjugator for compensating for non-linear effects. The optical communications network includes at least one dispersion compensation module before the optical phase conjugator and at least one dispersion compensati |
| 7308197 |
Modular add/drop multiplexer including a wavelength selective switch |
December 11, 2007 |
| Consistent with the present invention, tunable demultiplexers are provided in WSS-based add/drop multiplexer. The tunable demultiplexers are modular and thus allow the add/drop multiplexer to be readily expandable, and facilitate flexible add/drop capabilities whereby a channel present o |
| 7302388 |
Method and apparatus for detecting voice activity |
November 27, 2007 |
| Method and apparatus detect voice activity for spectrum or power efficiency purposes. The method determines and tracks the instant, minimum and maximum power levels of the input signal. The method selects a first range of signals to be considered as noise, and a second range of signa |
| 7292790 |
Method and system for compensating residual dispersion curvature |
November 6, 2007 |
| A method and system for compensating residual dispersion curvature in an optical communication network is disclosed. One embodiment employs two types of dispersion compensating fiber to reduce higher order terms in a residual dispersion profile. The two types of dispersion compensating |
| 7283546 |
System supporting the dynamic migration of telecommunication subscribers between call services p |
October 16, 2007 |
| An access device enables dynamic migration of telecommunications subscribers between multiple transport networks and call services providers. The access device stores access patterns that associate a subscriber with a call server and define trigger events. The access device monitors |
| 7283466 |
Tracking physical route changes in optical switching network |
October 16, 2007 |
| A method and system for tracking physical route changes in an optical switching network. One embodiment comprises a method for detecting changes in physical routes of connections within an optical switching network. The method includes receiving an event message from a node of the op |
| 7283462 |
Multiple bundle identification for calculation of a network protect path |
October 16, 2007 |
| Consistent with a feature of the present invention, protection and working routes are determined by assigning administrative weight values to each route in a network. The administrative weight value of a route can correspond to the physical distance associated with that route. Once the |
| 7280762 |
Optical communication system having dynamic gain equalization |
October 9, 2007 |
| An optical communication device, and related method, are provided for providing a tailored, spectrally non-uniform gain over a broad spectrum. In particular, the optical communication device includes an optical amplifier having a dynamic gain equalization (DGE) circuit that adjusts t |
| 7280529 |
Providing network management access through user profiles |
October 9, 2007 |
| The present invention provides a method for managing telecommunications networks through user profiles that establish management capabilities and lists of network devices capable of being managed through each user profile. Through profiles, users may be given controlled access to con |
