Li Zhang

US Patent:

6661785, Dec 9, 2003

Filed:

Oct 12, 1999

Appl. No.:

09/416054

Inventors:

Li Zhang - Alpharetta GA
Jeffrey P. Cassanova - Hiram GA
Alan R. Blackburn - Woodstock GA
Robert B. Collicott - Alpharetta GA

Assignee:

BellSouth Intellectual Property Corporation - Wilmington DE

International Classification:

H04L 1266

US Classification:

370352, 370410

Abstract:

An Internet Call Waiting-Voice over Internet Protocol (ICW-VOIP) service that uses a service control point and service node of a Public Switched Telephone Network (PSTN), acting as a gatekeeper and bridge respectively, to enable ICW subscribers to answer telephone calls during an internet session without having to disconnect internet access. The primary network components of the ICW-VOIP service comprise a proxy firewall, a service node, and a gateway. When a PSTN call is placed to a subscriber whose line is being used for internet access, the service control point accesses the subscribers internet address from a database and transmits a message over the internet to the subscriber giving the subscriber the option to accept the call as a VOIP call. Once accepted, the subscriber places an H. 323 call through the gateway to the service node.

US Patent:

6957357, Oct 18, 2005

Filed:

Jul 31, 2001

Appl. No.:

09/920138

Inventors:

Zhen Liu - Tarrytown NY, US
Cathy Honghui Xia - White Plains NY, US
Li Zhang - Yorktown Heights NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F001/04

US Classification:

713503, 713400

Abstract:

A method, computer program product, and data processing system for estimating and correcting the amount of clock skew in end-to-end network timing measurements is disclosed. Measured delays are combined with their time of measurement to create ordered pairs. These ordered pairs represent points within a Cartesian plane. The convex hull of these points is determined, and an optimal line segment from the resulting polygon is selected and extrapolated to create an affine function estimating clock skew over time. The optimal line segment of the polygon is one that optimizes a selected objective function. The objective function is selected so as to be an appropriate measurement of the accuracy of the resulting linear function as an estimate of the actual clock skew.

US Patent:

6981263, Dec 27, 2005

Filed:

Jun 29, 2001

Appl. No.:

09/893437

Inventors:

Li Zhang - Alpharetta GA, US
Jeffrey P. Cassanova - Hiram GA, US
Robert B. Collicott - Smyrna GA, US

Assignee:

BellSouth Intellectual Property Corp. - Wilmington DE

International Classification:

G06F015/163

US Classification:

719310, 709217, 709227

Abstract:

Embodiments of the present invention relate to systems and methods for a converged service creation and execution application. In an embodiment, an application is coupled to an application server. One or more open application programming interfaces are coupled to the application server, and service session management logic is also coupled to the application server.

US Patent:

7099944, Aug 29, 2006

Filed:

Jul 13, 2001

Appl. No.:

09/905010

Inventors:

Thomas Anschutz - Conyers GA, US
Jeffrey P. Cassanova - Hiram GA, US
Li Zhang - Alpharetta GA, US

Assignee:

BellSouth Intellectual Property Corporation - Wilmington DE

International Classification:

G06F 13/00
G06F 17/28
G06F 17/30

US Classification:

709227, 709245, 709223, 370352

Abstract:

Systems and methods for providing personalized internet protocol (IP) services to an IP enabled device residing on a local area network (LAN) are disclosed. The systems and methods utilize an access device in communication with an access provider network, and involve communicating a first IP address to the access device, the first address allowing the access device to communicate with a first plurality of IP service devices through an Internet service provider (ISP), and communicating a second IP address to the access device, the second address allowing the access device to communicate with a second plurality of IP service devices in the access provider network. When the access device receives IP traffic from the IP enabled device it determines whether the IP traffic is addressed to one of the second IP service devices. If yes, the IP traffic is forwarded to the one of the second IP service devices with the second address as a return address. Otherwise, the IP traffic is forwarded to the ISP with the first address as the return address.

US Patent:

7103644, Sep 5, 2006

Filed:

Jun 29, 2001

Appl. No.:

09/893439

Inventors:

Li Zhang - Alpharetta GA, US
Tom Anschutz - Conyers GA, US
Alan Blackburn - Woodstock GA, US
Jeffrey P. Cassanova - Hiram GA, US
Robert C. Collicott - Alpharetta GA, US

Assignee:

BellSouth Intellectual Property Corp. - Wilmington DE

International Classification:

G06F 15/16

US Classification:

709219, 709227

Abstract:

Embodiments of the present invention relate to systems for converged service creation and execution. In an embodiment, a system includes an application server and service session manager logic, where the service session manager logic is in communication with the application server. A converged service creation and execution environment messaging bus is in communication with the service session manager logic, and a plurality of service servers are in communication with the converged service creation and execution environment messaging bus.

US Patent:

7194649, Mar 20, 2007

Filed:

May 29, 2002

Appl. No.:

10/157610

Inventors:

Zhen Liu - Tarrytown NY, US
Cathy Honghui Xia - White Plains NY, US
Li Zhang - Yorktown Heights NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1/12

US Classification:

713400, 713375, 713503

Abstract:

Several algorithms are provided to estimate and remove relative clock skews from delay measurements based on the computation of convex hulls. The algorithms are linear in the number of measurement points for the case with no clock resets. For the more challenging case with clock resets, i. e. , the clocks are reset to some reference times during the measurement period, linear algorithms are provided to identify the clock resets and derive the best clock skew lines. The algorithms are also extended to environments in which at least one of the clocks is controlled by Network Time Protocol. These algorithms can also be extended for active clock synchronization to replace or further improve Network Time Protocol.

US Patent:

7203349, Apr 10, 2007

Filed:

Jan 29, 2002

Appl. No.:

10/059848

Inventors:

Li Zhang - Plainsboro NJ, US
Li Fan - Plainsboro NJ, US
Jianzhong Qian - Princeton Junction NJ, US

Assignee:

Siemens Corporate Research, Inc. - Princeton NJ

International Classification:

G06K 9/00

US Classification:

382128, 128922, 378 4

Abstract:

A system and method for automatically reducing false-positive nodule candidates associated with airways includes receiving a nodule candidate, testing for airway cavities connected to the candidate, and recognizing the candidate as a false-positive nodule candidate if it is connected to an airway cavity; where the testing may include perpendicular testing for airways that are relatively perpendicular to an examination plane and parallel testing for airways that are relatively parallel to an examination plane.

US Patent:

7209581, Apr 24, 2007

Filed:

Jul 23, 2004

Appl. No.:

10/898511

Inventors:

Li Zhang - Skillman NJ, US
Ming Fang - Princeton Jct. NJ, US

Assignee:

Siemens Medical Solutions USA, Inc. - Malvern PA

International Classification:

G06K 9/00

US Classification:

382131, 382173

Abstract:

A system and method for ground glass nodule (GGN) segmentation is provided. The method comprises: selecting a point in a medical image, wherein the point is located in a GGN; defining a volume of interest (VOI) around the point, wherein the VOI comprises the GGN; removing a chest wall from the VOI; obtaining an initial state for a Markov random field; and segmenting the VOI, wherein the VOI is segmented using the Markov random field.