| Patent application number | Description | Published |
|---|
| 20100122003 | RING-BASED HIGH SPEED BUS INTERFACE - A communication system management interface includes a control master; and one or more slaves under management by the control master; wherein each device, either the control master or slave, has at least an input signal connected to an output signal of another device to form a daisy-chain. | 05-13-2010 |
| 20110052201 | MODULAR COLORLESS AND DIRECTIONLESS MULTI-DEGREE RECONFIGURABLE OPTICAL ADD/DROP MULTIPLEXER NODE WITH IN-SERVICE UPGRADEABILITY - In a dense wavelength division multiplexed optical network, an upgradeable, modular, colorless, directionless, reconfigurable add/drop multiplexer having a small form factor. By using wavelength selective switches and couplers, the above features are achieved without the need for photonic cross connects. | 03-03-2011 |
| 20110085803 | ROADM TRANSPONDER AGGREGATOR SYSTEMS AND METHODS OF OPERATION - ROADM node systems and methods of operation are disclosed. ROADM node systems may include transponder aggregators including transponders to add signals for switching through the ROADM node. The transponder aggregators may be constrained from adding signals on adjacent channels for simultaneous use. Further, the transponder aggregators may include an optical coupler in lieu of an optical multiplexer. The ROADM system may include a set of wavelength selective switches associated with output ports that can provide an additional filtering function for the added signals prior to transmission on a WDM network. | 04-14-2011 |
| Patent application number | Description | Published |
|---|
| 20080240736 | Inter-Symbol Interference-Suppressed Colorless DPSK Demodulation - An optical device includes an interferometer for a received optical differential phase shift keying DPSK signal, and an equalizer integrated with the interferometer in a manner for reducing from optical filtering effects an interference by signal bits of the DPSK signal with signal bits of a contiguous DPSK signal. The interferometer is a Michelson delay interferometer type, but can also be a Mach-Zehnder delay interferometer type on fiber, waveguide or other optical structure. The equalizer is a Fabry-Perot type equalizer, but can be a ring resonator type or a fiber based equalizer. | 10-02-2008 |
| 20080260383 | CENTRALIZED RESOURCE MANAGEMENT IN WAVELENGTH SELECTIVE SWITCH BASED WAVELENGTH CROSS CONNECT SYSTEMS - A Centralized Resource Management (CRM) system that supports the sharing of all the transponders in a WXC node, i.e., any spare transponder can be reconfigured to accommodate any drop channel, regardless of wavelength or input port. Consequently, network restoration in case of network failures is supported as well as the ability to reconfigure as a result of dynamic traffic requirements in the network. CRM advantageously is applied to conventional WXC node as well as WSS-based WXC nodes in the WDM networks. Three CTM schemes which manage the transponders in the WSS-based WXC node are described along with reconfiguration algorithms for an optical switchless CRM solution. | 10-23-2008 |
| 20090016739 | PATTERN EFFECT REDUCTION OF OPTICAL SIGNALS - A passive optical equalizer and a predistortion technique are employed to reduce pattern effect in optical signals which result from narrow filtering. | 01-15-2009 |
| 20100247104 | Optical Communication System and Method for Generating Dark Return-to-Zero and DWDM Optical MM-Wave Generation For ROF Downstream link using Optical Phase Modulator and Optical Interleaver - A method of generating a dark-RZ pulse in an optical communications system with a dual-arm modulator by setting a direct current bias on the modulator to a specific value such that an output optical power from the modulator achieves a maximum value when the RF signals on the first and second arms of the modulator are off and maintaining the direct current bias at the specific value and applying RF signals to the first and second arms of the modulator and delaying one of the RF signals applied to one of the first and second arms relative to the other of the RF signals such that a dark-RZ pulse is generated with a duty cycle based on the delay. Another aspect of the invention provides a method for generating dense wave division multiplexing (DWDM) optical mm-waves in an optical transmission system by phase modulated DWDM optical signal and applying the phase modulated DWDM optical signal to an input port of an optical interleaver, the optical interleaver having a specified bandwidth to suppress the optical carriers and convert the DWDM optical signal to DWDM optical mm-waves; and amplifying the DWDM optical mm-waves and transmitting the DWDM optical mm-waves over single mode fiber (SMF). | 09-30-2010 |
| Patent application number | Description | Published |
|---|
| 20080263388 | METHOD AND APPARATUS FOR MANAGING CUSTOMER TOPOLOGIES - A method and apparatus for managing customer topologies on packet networks are disclosed. For example, the method creates at least two event correlation instances for at least one customer topology, where a first event correlation instance resides in a primary availability management server, and a second event correlation instance resides in a secondary availability management server. The method also creates a test node for the first event correlation instance, where the test node provides at least one test message. The method then receives at least one response generated by the first event correlation instance that is responsive to the at least one test message, where the at least one response is received by the second event correlation instance. The method then performs a fail-over to the second event correlation instance from the first event correlation instance if a failure is detected from the at least one response. | 10-23-2008 |
| 20090154362 | METHOD AND APPARATUS FOR MONITORING OF A NETWORK DEVICE - A method and apparatus for monitoring of a network device are disclosed. For example, the method receives a monitoring record from a network device, and determines whether the network device is listed in an active pool of monitored network devices. The method then automatically enables the monitoring of the network device if the network device is not listed in the active pool of monitored network devices. | 06-18-2009 |
| 20100150170 | Scalable and Robust Mechanism for Remote IP Device Monitoring With Changing IP Address Assignment - A method is provided for monitoring devices with changing IP addresses. SNMP trap is received from a device at a first IP address to notify that a connection is up, and a SNMP poll is transmitted to the device to obtain an identifier. Predetermined consecutive SNMP GET requests are transmitted to the device in intervals. Responsive to failing to receive from the device predetermined consecutive SNMP GET responses equal to the predetermined consecutive SNMP GET requests, it is determined that there is a connection failure or a device failure and checked whether the device is in a maintenance window. If not in maintenance window, a trouble ticket is generated. Responsive to the failure, there is a predetermined waiting period for another SNMP trap from the device with a second IP address and the same identifier notifying that a connection is back up, and no trouble ticket is generated. | 06-17-2010 |
| 20100157812 | METHOD AND APPARATUS FOR ASYNCHRONOUS ALARM CORRELATION - A method and apparatus for providing asynchronous alarm correlation in packet networks are disclosed. For example, the method receives a trigger, and performs an asynchronous correlation of at least one root cause alarm with at least one symptom alarm. | 06-24-2010 |
