Rajender R Nednur

US Patent:

8521022, Aug 27, 2013

Filed:

Apr 23, 2002

Appl. No.:

10/128092

Inventors:

Kotikalapudi Sriram - Marlboro NJ, US
Mukul Katiyar - Piscataway NJ, US
Jonathan Titchener - Green Brook NJ, US
Rajender Rao Nednur - North Brunswick NJ, US
Anthony Vernon Walker Smith - Ottawa, CA

Assignee:

Alcatel Lucent - Paris

International Classification:

H04J 14/00

US Classification:

398 57

Abstract:

In an automatically switched optical network, the wavelengths are assigned to optical path based on their intrinsic physical performance and on the current network operating parameters. The wavelength performance information is organized in binning tables, based primarily on the wavelength reach capabilities. A network topology database provides the distance between the nodes of the network, which is used to determine the length of the optical path. Other network operating parameters needed for wavelength selection are also available in this database. Once a bin corresponding to the path length is identified in the binning table, the wavelength for that path is selected based on length only, or based on the length and one or more additional parameters. The optical path performance is estimated for the selected wavelength, and the search continues if the estimated path performance is not satisfactory. Several available wavelengths are searched and of those, the wavelength that is most used along the optical path in consideration or alternatively network-wide is selected and assigned.

US Patent:

20060002716, Jan 5, 2006

Filed:

Sep 28, 2004

Appl. No.:

10/952325

Inventors:

John Guy - Nepean, CA
Mukul Katiyar - Andhra Pradesh, IN
Robert Nadon - Ottawa, CA
Rajender Nednur - Temple Terrace FL, US
Christian Scheerer - Weissach im Tal, DE
Jonathan Titchener - Dallas TX, US

International Classification:

H04B 10/02

US Classification:

398175000

Abstract:

An agile transparent network with a trail routing and switching (also called “engineering”) mechanism is provided that enables efficient use of regenerators and wavelengths available in the network, while maintaining a very efficient time-to-service. The trail engineering mechanism allows fast, automatic establishment of new connections based on the current network architecture, connectivity and loading and also on conditions in the connection request. Selection of regenerator sites and of the wavelengths used on each regenerator segment is performed with optimal use of current network resources, while ensuring that the quality of the selected trail is adequate for the respective call. The mechanism provides for both distance and performance balancing, and it optimizes the network response time.

US Patent:

20130302033, Nov 14, 2013

Filed:

Jul 17, 2013

Appl. No.:

13/944401

Inventors:

Kotikalapudi Sriram - Marlboro NJ, US
Mukul Katiyar - Piscataway NJ, US
Jonathan Titchener - Green Brook NJ, US
Rajender Rao Nednur - North Brunswick NJ, US
Anthony Vernon Walker Smith - Ottawa, CA

Assignee:

Alcatel Lucent - Murray Hill NJ

International Classification:

H04Q 11/00

US Classification:

398 49

Abstract:

In an automatically switched optical network, the wavelengths are assigned to optical path based on their intrinsic physical performance and on the current network operating parameters. The wavelength performance information is organized in binning tables, based primarily on the wavelength reach capabilities. A network topology database provides the distance between the nodes of the network, which is used to determine the length of the optical path. Other network operating parameters needed for wavelength selection are also available in this database. Once a bin corresponding to the path length is identified in the binning table, the wavelength for that path is selected based on length only, or based on the length and one or more additional parameters. The optical path performance is estimated for the selected wavelength, and the search continues if the estimated path performance is not satisfactory. Several available wavelengths are searched and of those, the wavelength that is most used along the optical path in consideration or alternatively network-wide is selected and assigned. This method helps minimize wavelength fragmentation. The binning tables may have various granularities, and may be organized by reach, or by reach, wavelength spacing, the load on the respective optical path, the fiber type, etc.