Class 398/89 - Multiple Access (e.g., WDMA)

Subclass of Class 398 - Optical communications
Definition: Subject matter wherein access to multiple channels on
No. of patents: 28
Last issue date: 05/22/2012

Number	Title	Issue Date
8184979	Optical OFDMA network with dynamic sub-carrier allocation A system and method for dynamically allocating sub-carriers between the nodes of an optical OFDMA ring network or an OFDMA passive optical network. A carrier allocation system assigns sub-carriers according to a utility function based on real-time measurements of ar...	05/22/2012
8180223	System and method for extending reach in a passive optical network In accordance with the teachings of the present invention, a system and method for extending reach in a passive optical network (PON) is provided. In a particular embodiment, a method for extending reach in a PON includes transmitting traffic at a first wavelength f...	05/15/2012
8170418	Protected light source for multiple wavelength division multiplexed passive optical networks (WDM-PONS) A protected light source for generating seed light for at least two wavelength division multiplexed passive optical networks (WDM-PONs). The protected light source includes an optical coupler having N≧2 input ports and M≧2 output ports, each output port being op...	05/01/2012
8050565	Multiservice private network and interface modules for transporting, on such a network, data in different formats A multiservice private network and interface modules (M1-M5). Each of said modules is dedicated to interfacing a specific terminal equipment (T1-T4, GTW; 310-380) in the multiservice private network. The interface modules (M...	11/01/2011
8050566	System and methods for quantum key distribution over WDM links A system and a method for quantum key distribution between a transmitter and a receiver over wavelength division multiplexing (WDM) link are disclosed. The method includes providing one or more quantum channels and one or more conventional channels over the WDM link...	11/01/2011
8000604	Orthogonal frequency division multiple access (OFDMA) based passive optical network (PON) architecture and its extension to long distance A passive optical network (PON) device, system and method include an optical line terminal (OLT) receiver configured to receive multiple signals at different wavelengths simultaneously and enable multiple transmitters to operate at the same time during one upstream ...	08/16/2011
7826749	Method and system for quantum key distribution over multi-user WDM network with wavelength routing A system and a method for quantum key distribution over a multi-user wavelength division multiplexing (WDM) network are disclosed. The system comprises a tunable or multi-wavelength transmitter; a plurality of receivers, each assigned a receiving-wavelength; and a m...	11/02/2010
7639947	System and methods for quantum key distribution over WDM links A system and a method for quantum key distribution between a transmitter and a receiver over wavelength division multiplexing (WDM) link are disclosed. The method includes providing one or more quantum channels and one or more conventional channels over the WDM link...	12/29/2009
7444047	Multiplexing optical system A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have been emitted from semiconductor lasers. The first condensing lens conden...	10/28/2008
7421203	Method for transmitting packet in wireless access network based on wavelength identification code scheme A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network Controllers) to one sub-ring where the “n” is a positive integer, and a...	09/02/2008
7418205	Method and apparatus for controlling a frequency hopping laser An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a plurality of closely spaced modes relative to optical frequencies. The ...	08/26/2008
7389048	Optical wavelength-division multiple access system and optical network unit The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical signals corresponding to the n ONUs, a wavelength band Ua (wave...	06/17/2008
7386236	Multiple wavelength TDMA optical network A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time division multiple access (TDMA) protocol. The upstream TDMA traffic ther...	06/10/2008
7286731	Monolithically integrated optical coupler with substantially no splitting loss A lossless optical coupler includes at least one input waveguide, at least two output waveguides and an intermediate optical splitter. The optical splitter of the present invention further comprises an active section adapted to provide contemporaneous splitting and ...	10/23/2007
7272319	System and method for secure multiple wavelength communication on optical fibers A method of optical communication having improved security is described. The data content of an initially provided data signal is apportioned among two or more distinct optical wavelength channels. A transmitted signal spans these two or more channels. A respective ...	09/18/2007
7212708	Optical grating based multiplexer device with power tap capability In an optical grating device, a grating arrangement receives different wavelength output signals from a plurality of radiation sources at input ports thereof, and generates therefrom a multiplexed wavelength output signal at a zero diffraction order output port of t...	05/01/2007
7177542	Generator of optical data carrier signals with selectable carrier wavelengths The present invention concerns a generator (G1) for generating at least M data carrier optical signals with selectable carrier wavelengths, where M is an integer greater than 1, said generator comprising N laser sources (Si) with constant and diffe...	02/13/2007
7164860	Advanced multi-protocol optical transport network A high-speed optical network includes according to the invention a housing having a plurality of slots for accommodating a number of line cards and an optional backplane facilitating communication between the line cards. The line cards include a client communication...	01/16/2007
7068934	Optical interconnect An optical interconnect comprises an input configured to receive light of a plurality of light wavelengths and a plurality of holographic optical elements. Each element configured to reflect one out of the plurality of light wavelengths and allowing others of the pl...	06/27/2006
7041959	System and method for monitoring the performance of dense wavelength division multiplexing optical communications systems A system and method for monitoring all the characteristic parameters of a DWDM communication system is implemented with two variants. Firstly, this is achieved by means of a specific grating spectrometer displaying a high resolution and a high-speed sampling of the ...	05/09/2006
7013086	Access node for optical networks with variable-access wavelengths, user device for connection to such an access node, method for feeding a number of signals from a number of users into an optical network and using an access node and at least one user device for carrying out such a method The access node for optical networks with variable access wavelengths can be connected to user devices via respective first optical conductors and can be connected to the optical network via second optical conductors. The novel access node has light sources which em...	03/14/2006
6981077	Global access bus architecture Global access bus architecture includes a master request bus and a slave request bus separated from each other and pipelined. The global access bus architecture includes packet input global access bus software code for flow of data packet information from a flexible...	12/27/2005
6765670	Spectrometer module and applications thereof The present invention relates to a spectrometer module comprising an input, for receiving an incoming optical signal, a variable differential group delay (DGD) element, for applying a variable birefringence retardation to said incoming optical signal, and a detector...	07/20/2004
5943150	Massively parallel processor networks with optical express channels An optical method for separating and routing local and express channel data comprises interconnecting the nodes in a network with fiber optic cables. A single fiber optic cable carries both express channel traffic and local channel traffic, e.g., in a mas...	08/24/1999
5612806	Acknowledgement using subcarrier multiplexed tones Subcarrier multiplexed acknowledgment tones are used for contention recovery in multiple-access WDM networks with basedband data packets and subcarrier multiplexed control headers. Upon receiving a data message from another node, the receiving node sends ...	03/18/1997
5446572	Optical interconnects for high speed backplanes using spectral slicing An n-channel optical interconnect is suitable for use as a high speed, low latency interconnect at a backplane of a parallel processing computer. The interconnect uses spectral slicing to address the output of the processor to one or more other processors...	08/29/1995
5077728	Frequency division multiple access network An N×N passive star coupler can be used to provide a high performance optical data network to interconnect many users at gigabit rates. Ignoring excessive losses, a signal incident on any input port is divided equally between all of the output ports. The...	12/31/1991
4959826	Spread spectrum optical communication system with heterodyne detection A broad spectrum optical carrier from a source is divided over at least two paths and the carrier in at least one path is modulated in accordance with information. The paths are recombined with delay multiplexing. At a distribution point, the recombined p...	09/25/1990

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Class 398/89 - Multiple Access (e.g., WDMA)