Kostas N Oikonomou

US Patent:

7916657, Mar 29, 2011

Filed:

Mar 13, 2008

Appl. No.:

12/075735

Inventors:

Robert Duncan Doverspike - Tinton Falls NJ, US
Kostas Oikonomou - Colts Neck NJ, US
Rakesh K. Sinha - Edison NJ, US

Assignee:

AT&T Intellectual Property II, L.P. - Reno NV

International Classification:

H04L 1/00

US Classification:

370252

Abstract:

Network performability characteristics with improved accuracy are derived by taking into account, in the various analyzed network failure states, attributes of elements at the logical level other than just the capacities of edges, as well as by taking into account one or more “abstract components,” such as scheduled maintenance, and by using multiple traffic matrices.

US Patent:

7974213, Jul 5, 2011

Filed:

Nov 21, 2008

Appl. No.:

12/275948

Inventors:

Rakesh Kumar Sinha - Edison NJ, US
Kostas N. Oikonomou - Colts Neck NJ, US

Assignee:

AT&T Intellectual Property I, L.P. - Atlanta GA

International Classification:

H04L 12/28

US Classification:

370252, 370255

Abstract:

Methods and apparatus to select composite link cost-out thresholds are disclosed. A disclosed example method comprises collecting traffic statistics for a communication network, computing, based on the collected traffic statistics, a plurality of flow rates for a composite link of the communication network for respective ones of a plurality of potential fault conditions for the composite link, computing a plurality of remaining capacities of the composite link for respective ones of the plurality of fault conditions, computing a plurality of differences between respective ones of the plurality of flow rates and the plurality of remaining capacities, and selecting a cost-out threshold for the composite link based on the plurality of computed differences.

US Patent:

8010694, Aug 30, 2011

Filed:

Mar 13, 2008

Appl. No.:

12/075719

Inventors:

Robert Duncan Doverspike - Tinton Falls NJ, US
Kostas Oikonomou - Colts Neck NJ, US
Rakesh K. Sinha - Edison NJ, US

Assignee:

AT&T Intellectual Property II, L.P. - Reno NV

International Classification:

G06F 15/16

US Classification:

709235, 709200, 709223, 709224, 370237

Abstract:

Network performability characteristics with improved accuracy are derived by taking into account, in the various analyzed network failure states, attributes of elements at the logical level other than just the capacities of edges, as well as by taking into account one or more “abstract components,” such as scheduled maintenance, and by using multiple traffic matrices.

US Patent:

20090185496, Jul 23, 2009

Filed:

Mar 13, 2008

Appl. No.:

12/075734

Inventors:

Robert Duncan Doverspike - Tinton Falls NJ, US
Kostas Oikonomou - Colts Neck NJ, US
Rakesh K. Sinha - Edison NJ, US

International Classification:

G01R 31/08

US Classification:

370245

Abstract:

Network performability characteristics with improved accuracy are derived by taking into account, in the various analyzed network failure states, attributes of elements at the logical level other than just the capacities of edges, as well as by taking into account one or more “abstract components,” such as scheduled maintenance, and by using multiple traffic matrices.

US Patent:

20090252033, Oct 8, 2009

Filed:

Apr 8, 2008

Appl. No.:

12/099535

Inventors:

Kadangode Ramakrishnan - Berkeley Hgts. NJ, US
Robert Duncan Doverspike - Tinton Falls NJ, US
Guangzhi Li - Madison NJ, US
Dongmei Wang - Madison NJ, US
Kostas Oikonomou - Colts Neck NJ, US

Assignee:

AT&T Knowledge Ventures, L.P. - Reno NV

International Classification:

H04L 12/26
H04L 12/28

US Classification:

370228, 370254

Abstract:

Systems and methods to distribute media content are provided. A particular method includes receiving first link weighting factors and second link weighting factors at a router of a node of a multicast network and determining a primary path to a next hop node based on the first link weighting factors. Additionally, the method includes determining a backup path from a router of the primary path to the next hop node based on the second link weighting factors. The backup path does not overlap any primary path between two nodes of the network. Further, the method includes receiving a data packet from a parent node and routing a copy of the data packet from the router to the next hop node via the backup path, when a network link related to the router has failed. The method also includes routing data packets via a re-configured multicast tree that excludes the failed link.

US Patent:

7567511, Jul 28, 2009

Filed:

May 10, 2006

Appl. No.:

11/431305

Inventors:

Kostas Oikonomou - Colts Neck NJ, US
Rakesh K. Sinha - Edison NJ, US

Assignee:

AT&T Intellectual Property II, L.P. - Reno NV

International Classification:

H04L 12/56

US Classification:

370230

Abstract:

A method and apparatus is disclosed wherein a cost of bandwidth usage in a virtual private network is calculated as a function of a plurality of traffic matrices associated with said bandwidth. In a first embodiment, the cost is calculated as a function of the maximum number of channels required to support an upper bound of the bandwidth of all connections originating from at least one node in the network. In accordance with another embodiment, the cost of providing service is calculated as a function of a traffic matrix in said plurality of traffic matrices, said traffic matrix requiring the highest possible bandwidth use of all traffic matrices in said plurality of traffic matrices. Finally, in accordance with a third embodiment, said cost is calculated as a function of the most-likely amount of bandwidth used by a customer.

US Patent:

20220311671, Sep 29, 2022

Filed:

Jun 6, 2022

Appl. No.:

17/805675

Inventors:

- Atlanta GA, US
Muhammad Bilal Anwer - Branchburg NJ, US
Rakesh Sinha - Edison NJ, US
Bingzhe Liu - Champaign IL, US
Kostas Oikonomou - Colts Neck NJ, US
Vijay Gopalakrishnan - Edison NJ, US

International Classification:

H04L 41/0893
G06F 16/901
H04L 41/14
H04W 24/02

Abstract:

A processing system may obtain an intent comprising a desired network state for a telecommunication network, determine an existing network state, where the desired network state and the existing network state are defined in accordance with a graph representing the telecommunication network, where the graph includes objects and relationships between the plurality of objects, and where each of the objects includes one or more properties. The processing system may compose a strategy that includes a plurality of policies to obtain the desired network state from the existing network state, where each of the policies comprises an action that is to be implemented in the telecommunication network, where the composing comprises performing a state exploration process over the graph, and where each state transition of the process corresponds to one of the policies. The processing system may then implement the strategy to place the telecommunication network in the desired network state.

US Patent:

20230043573, Feb 9, 2023

Filed:

Oct 20, 2022

Appl. No.:

17/969751

Inventors:

- Atlanta GA, US
Weiyi Zhang - Edison NJ, US
Sarat Puthenpura - Berkeley Heights NJ, US
Kostas Oikonomou - Colts Neck NJ, US

Assignee:

AT&T Intellectual Property I, L.P. - Atlanta GA

International Classification:

H04W 24/02
H04W 88/14
H04W 24/08
H04W 28/08

Abstract:

Aspects of the subject disclosure may include, for example, monitoring communication traffic in a communication network including a plurality of cell sites and a plurality of collector circuits over a time period, storing information about the communication traffic and information about available network resources in a database and predicting where additional capacity will be needed in the communication network at a future time, wherein the predicting is based on the information about the communication traffic. The subject disclosure may further include improving assignment of additional capacity in the communication network between the plurality of cell sites and the plurality of collector circuits based on the information about available network resources and communicating with network switches to assign the additional capacity within the communication network and initiate communication in the communication network. Other embodiments are disclosed.