Cagatay A Buyukkoc

6452902, Sep 17, 2002

Sep 8, 2000

09/570240

Cagatay Buyukkoc - Holmdel NJ
David J. Houck - Colts Neck NJ
Pravin Kumar Johri - Aberedeen NJ
Rodolfo Alberto Milito - Piscataway NJ

ATT Corp. - Basking Ridge NJ

H04J 324

370235, 370230, 370389, 3703951, 370409, 370471

An efficient approach and corresponding apparatus for selecting virtual paths in a network for routing datagrams achieves effective sharing of capacity without adversely affecting call setup latency. Edge nodes of the network assign calls to virtual paths based on the destination of the call and the current load status of each of a relatively small number of paths. Each call is assigned a VPI (Virtual Path Identifier) corresponding to the path chosen and a VCI (Virtual Circuit Identifier) corresponding to the identity of the call at that edge node. The ATM backbone nodes route calls based solely on the VPI. Capacity management and load balancing is achieved by each edge node keeping track of the load on each access link from its edge node to the rest of the network and of the congestion status of the various links in the network. In one embodiment, the edge node periodically sends information about its usage of the network to a âcentral fabric network interfaceâ which combines information from all edge nodes, evaluates congestion status for the network links, and forwards that information back to the edge nodes.

6463062, Oct 8, 2002

Dec 23, 1998

09/219319

Cagatay Buyukkoc - Holmdel NJ
David J. Houck - Colts Neck NJ
Pravin Kumar Johri - Aberdeen NJ
Steven M. Michelson - Freehold NJ
Rodolfo Alberto Milito - Piscataway NJ

ATT Corp. - New York NY

H04J 324

3703951, 370401, 370409, 370471

A method is provided for setting up a communication from a first edge node, across a network that uses direct virtual path routing, to a second edge node. The first edge node receives a request to set up the communication. The second edge node is identified as the destination of the communication, based on the request. A first virtual path identifier (VPI) is obtained that defines a first path from the first edge node across the network to the second edge node. A second VPI is obtained that defines a second path from the second edge node across the network to the first edge node. The first and second VPIs are selected by a routing status database. A first virtual channel identifier (VCI) within the first VPI is selected. A second virtual channel identifier (VCI) within the second VPI is selected. Data is transmitted from the first edge node to the second edge node using the first VPI and first VCI, and from the second edge node to the first edge node using the second VPI and second VCI.

6788672, Sep 7, 2004

Apr 15, 1997

08/842591

Cagatay Buyukkoc - Holmdel NJ
Michael B. Jones - Florham Park NJ
David Hilton Shur - Middletown NJ

ATT Corp. - New York NY

H04L 1256

370352, 370401

A method and apparatus for telephony messaging based on a network of packet telephony messaging (PTM) servers. A message is received at an originating PTM server from an originator for delivery to a target device for a recipient. The message is stored at the originating PTM server. The message is routed from the originating PTM server (possibly via a second and subsequent PTM servers) over a first network to a destination PTM server located near the target device. The recipient is notified of the message by the destination PTM server. The message is delivered to the target device from the second PTM server over a second network in response to a request by the recipient.

7002963, Feb 21, 2006

Sep 3, 2002

10/233739

Cagatay Buyukkoc - Holmdel NJ, US
David J Houck - Colts Neck NJ, US
Pravin Kumar Johri - Aberdeen NJ, US
Steven M. Michelson - Freehold NJ, US
Rodolfo Alberto Milito - Los Gatos CA, US

AT&T Corp. - Bedminster NJ

H04L 12/56

3703951, 3703953, 37039552, 370401, 370409

The problems associated with prior solutions for implementing ATM or IP/MPLS in a large-scale network are overcome by providing an efficient means by which capacity in the network is more fully shared without adversely affecting call or session setup latency, and at the same time simplifying network operations. This is achieved by performing the functions of route setup, route allocation, and capacity management in a network at the edges (e. g. , the interfaces existing between each ATM switch or IP/MPLS router and customers) of the network. In accordance with the principles disclosed herein, the edges contain nodes that form the interface between the ATM switches and IP/MPLS routers and the link(s) that interconnect them and the outside world. These nodes comprise controllers and other apparatus that in some cases may be incorporated in, or connected as adjuncts to, the ATM switches or IP/MPLS routers.

7158524, Jan 2, 2007

Dec 30, 2005

11/322836

Cagatay Buyukkoc - Holmdel NJ, US
David J Houck - Colts Neck NJ, US
Pravin Kumar Johri - Aberdeen NJ, US
Steven M. Michelson - Freehold NJ, US
Rodolfo Alberto Milito - Los Gatos CA, US

AT&T Corp. - New York NY

H04L 12/56

3703951, 3702953, 370401, 370409

A method and apparatus is provided for setting up an IP session from a first node, across a network that uses direct virtual path routing, to a second node. The first node receives a request to set up the session. The second node is identified as the destination of the session, based on the request. A first stack of labels is obtained that defines a first path. A second stack of labels is obtained that defines a second path. A first label identifier is selected that identifies the session in a first direction. A second label identifier is selected that identifies the session in a second direction. Finally the data is transmitted from the first node to the second node and from the second node to the first node using the first stack and second stack of labels and label identifiers, respectively.

20110151885, Jun 23, 2011

Dec 21, 2009

12/643265

Cagatay Buyukkoc - Holmdel NJ, US
Sreevalsan Vallath - Pleasanton CA, US

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

H04W 72/04

4554521

A radio resources management algorithm, through a process of function evaluation and optimization, determines and assigns resource priority values to wireless resource requests. Resource requests may be arranged within a priority queue in accordance with the priority values. The priority queue may control access to wireless resources that are typically reserved for handing off ongoing calls between cells. The algorithm may supplement or replace an existing CAC algorithm. The algorithm may also determine whether sufficient spare handoff resources are available to fulfill a resource request. If sufficient resources are not available, the disclosed algorithm may implement one or more congestion control mechanism designed to free up handoff resources. If sufficient resources are not available to fulfill a resource request, the resource request may be accepted and arranged in the priority queue if it is of sufficiently high priority, or may be rejected if the request is of low priority.

20120131110, May 24, 2012

Nov 24, 2010

12/953590

Cagatay Buyukkoc - Holmdel NJ, US
Robert C. Streijl - Chicago IL, US

AT&T INTELLECTUAL PROPERTY I, L.P. - Reno NV

G06F 15/16

709206, 709248

A method includes receiving a request to establish a group presence session between at least a first device associated with a first network and a second device associated with a second network. During the group presence session, multimedia content is provided to the first device and to the second device at substantially the same time, and first presence information from the first device is provided to the second device at substantially the same time as second presence information from the second device is provided to the first device. The method further includes synchronizing the multimedia content, the first presence information, and the second presence information based on a first device capability, a second device capability, information associated with the first network, and information associated with the second network. Synchronized content streams that include the multimedia content and presence information are transmitted to the devices via the respective networks.

20130054766, Feb 28, 2013

Aug 22, 2011

13/214269

Jeffrey A. Aaron - Atlanta GA, US
Cagatay Buyukkoc - Holmdel NJ, US
Robert C. Streijl - Chicago IL, US

AT&T INTELLECTUAL PROPERTY I, L.P. - Atlanta GA

G06F 15/177

709221

Methods, systems, and products notify users when changes in a communication network improve quality of service. When a service provider changes a configuration parameter in the communications network, a change to the configuration parameter is compared to a rule. When the change to the configuration parameter results in a perceivable improvement in quality of service, a notification is sent to a user's device. The notification informs the user's device of the improvement in quality of service caused by the change to the configuration parameter.