At+t Corp.

At&t Intellectual Property I, L.p.

Lucent Technologies Inc.

Other

At&t Bell Laboratories

Patrick P Iannone

Kenneth Charles Reichmann

Nicholas J Frigo

Xiang Zhou

Aleksandra Smiljanic

Cedric F Lam

Martin Birk

Thomas Edward Darcie

Han Hyub Lee

Paul Shala Henry

Byoung-Jo J Kim

Sheryl Leigh Woodward

Mark David Feuer

Robert William Tkach

Andrew Roman Chraplyvy

Ivan P Kaminow

Julian Stone

Lawrence Warren Stulz

Adel A Saleh

Kent McCammon

Tingye Li

A system and methodology that facilitates macrocell-to-femtocell handovers during an on-going communication session by augmenting a neighbor list with femtocell data is provided. Moreover, the femtocell data associated with a set of femtocells that the a user equipment (UE) is authorized to access is added to a neighbor list. When a handover is initiated, the femtocell data is utilized to facilitate scanning of a radio environment of the user equipment to detect a target cell site for the handover. In one aspect, location data and/or serving cell data associated with the set of femtocells is utilized to limit the number of femtocells that are added to the neighbor list.

Inbound handover for macrocell-to-femtocell call transfer

A method, apparatus and system for minimally intrusive fiber identification includes imparting a time-varying modulation onto an optical signal propagating in an optical fiber and subsequently detecting the presence of the time-varying modulation in the optical signal transmitting through the fiber to identify the fiber. In a specific embodiment of the invention, a time-varying curvature is imposed on the fiber to be identified and the presence of the resultant time variation in the transmitted power of a propagating optical signal is subsequently detected for identification of the manipulated fiber.

Method, apparatus and system for minimally intrusive fiber identification

A method and system for upgrading service to an optical network terminal among a plurality of optical network terminals on a passive optical network. The upgrade enables bidirectional communications between a central office and the optical network terminal over dedicated downstream and upstream wavelength channels outside the downstream and upstream wavelength bands associated with the passive optical network. The optical network terminal to receive upgraded service is disconnected from a passive optical splitter at a remote node serving the optical network terminal, and optically coupled to a port of the multi-port arrayed waveguide grating at the remote node. Wavelength taps are provided at the central office and the remote node to facilitate multiplexing and demultiplexing the dedicated downstream and upstream channels with the downstream and upstream wavelength bands associated with the passive optical network. In this manner, certain users on the passive optical network may receive service upgrades to wavelength specific services without affecting other users who remain on the passive optical network.

Wavelength upgrade for passive optical networks

A method and apparatus for providing passive optical networks with extended reach and/or splitting ratio are disclosed. For example, the optical network comprises a first optical line termination (OLT) device having a transceiver for sending and receiving optical signals. The optical network further comprises an optical extender box comprising at least one hybrid SOA-Raman amplifier, wherein the optical extender box is coupled to the first optical line termination device via a first standard single mode fiber section. Finally, the optical network further comprises an optical splitter coupled to the optical extender box via a second standard single mode fiber section.

Method and apparatus for providing passive optical networks with extended reach and/or split

A method and apparatus for implementing a hybrid SOA-Raman amplifier in a central office in order to enable multiple passive optical networks to share one or more enhancement service sources, e.g., to share a source for a broadcast service are disclosed.

Method and apparatus for enabling multiple passive optical networks to share one or more sources

A method and apparatus for enabling multiple optical line termination (OLT) devices to share a feeder fiber are disclosed. For example, the optical network comprises a plurality of optical line termination (OLT) devices, where each OLT device having a transceiver for sending and receiving optical signals. The optical network further comprises a wave division multiplexer (WDM) combiner, coupled to the plurality of OLT devices, for combining optical signals received from the plurality of OLT devices. The optical network further comprises an optical extender box comprising at least one hybrid SOA-Raman amplifier, wherein the optical extender box is coupled to the WDM combiner via a first standard single mode fiber section. Finally, the optical network further comprises at least one optical splitter coupled to the optical extender box via a second standard single mode fiber section.

Method and apparatus for enabling multiple optical line termination devices to share a feeder fiber

A system and method for a transparent WDM metro ring architecture in which optics enables simultaneous provisioning of dedicated wavelengths for high-end user terminals, while low-end user terminals share wavelengths on 'virtual rings'. All wavelengths are sourced by the network and remotely modulated at customer 'End Stations' by low cost semiconductor optical amplifiers, which also serve as transmission amplifiers. The transparent WDM metro ring architecture permits the communication of information and comprises a fiber optical feeder ring, at least one fiber optical distribution ring, a network node (NN), at least one access node (AN) said network node and said at least one access node connected via said fiber optical feeder ring and at least one end station (ES) connected via said fiber optical distribution ring to said at least one access node, wherein said user is attached to said at least one end station.

System and method for operating transparent node for WDM shared 'virtual ring' networks

A system and method for a transparent WDM metro ring architecture in which optics enables simultaneous provisioning of dedicated wavelengths for high-end user terminals, while low-end user terminals share wavelengths on 'virtual rings'. All wavelengths are sourced by the network and remotely modulated at customer 'End Stations' by low cost semiconductor optical amplifiers, which also serve as transmission amplifiers. The transparent WDM metro ring architecture permits the communication of information and comprises a fiber optical feeder ring, at least one fiber optical distribution ring, a network node (NN), at least one access node (AN) said network node and said at least one access node connected via said fiber optical feeder ring and at least one end station (ES) connected via said fiber optical distribution ring to said at least one access node, wherein said user is attached to said at least one end station. A simple node that supports bi-directional propagation in transparent WDM metro architectures using &#x201c;virtual rings&#x201d; is also described. A method for communicating information over a WDM fiber optical ring network architecture in a metro access arena using one or more wavelengths, which can be shared by a plurality of user terminals, each user terminal coupled to an end station comprises the steps of sending downstream data packets, sending optical chalkboard packets consisting of ones and sending control signals.

Method for operating transparent node for WDM shared 'virtual ring' networks

Growing community of inventors

Red Bank, NJ, United States of America

Patrick P Iannone