Feng Ming Wang

US Patent:

7898955, Mar 1, 2011

Filed:

Jun 12, 2006

Appl. No.:

11/451261

Inventors:

Jia Wang - Randolph NJ, US
Oliver Spatscheck - Randolph NJ, US
Lixin Gao - Amherst MA, US
Feng Wang - Amherst MA, US

Assignee:

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

International Classification:

G06F 11/00
H04L 12/28
H04L 12/56

US Classification:

370235, 370392, 37039521, 370401

Abstract:

A system and method for detecting and diagnosing routing problems in a network in real-time by recording TCP flow information from at least one server to at least one prefix, and observing retransmission packets communicated from the at least one server to the at least one prefix. When a predetermined threshold for TCP flows to a prefix is reached, traceroutes may be triggered to a destination in the prefix, and the traceroutes analyzed to determine whether to issue an alarm for a routing failure. The system includes a real-time data collection engine for recording unidirectional TCP flow information, a real-time detection engine for observing the retransmission packets and issuing a warning upon a retransmission counter exceeding a predetermined threshold, and a real-time diagnosis engine for triggering at least one traceroute to a destination in the prefix that is randomly selected from TCP flows in retransmission states.

US Patent:

51930048, Mar 9, 1993

Filed:

Dec 3, 1990

Appl. No.:

7/621343

Inventors:

Feng Ming Wang - New York NY
Dimitris Anastassiou - New York NY

Assignee:

The Trustees of Columbia University in the City of New York - New York NY

International Classification:

H04N 7133

US Classification:

358136

Abstract:

In accordance with the invention, a method, for coding multi-mode predictive interpolative coded fields of video, includes the steps of: (a) providing a current field of interlaced pixel data, and past and future fields of such data; (b) providing estimated pixel data at omitted line positions in the past and future fields of data to form enhanced fields of pixel data; (c) comparing a block of pixel data from the current field with corresponding blocks of data from such past and future fields to derive motion vector signals indicative of best matched blocks of data; (d) developing pixel error signals representing pixel by pixel errors based on utilization of best matched blocks in different modes for comparison with the block of pixel data from the current field and developing best mode signals indicative of which of such modes represents the least overall error; and (e) providing the best mode signals, motion vector signals, pixel error signals, and the future odd field of data for transmission for use by a decoder.

US Patent:

20160337071, Nov 17, 2016

Filed:

Jul 25, 2016

Appl. No.:

15/218811

Inventors:

- Plano TX, US
Feng Wang - Bedminster NJ, US

International Classification:

H04J 14/02
H04Q 11/00
G02B 6/293
H04J 14/08

Abstract:

An approach to proving a flexible grid architecture for time and wavelength division multiplexed passive optical networks is described. One embodiment includes an optical transmitter array configured to transmit an optical signal, an optical combiner coupled to the optical transmitter array configured to receive unlocked wavelengths from the optical transmitter array and output a single optical signal, and an optical amplifier coupled to the optical combiner configured to boost downstream optical power. In some embodiments, a WDM filter is coupled to the optical amplifier, and a tunable optical network unit (ONU) coupled to the WDM filter is configured to transmit and receive the optical signals. In still other embodiments, a cyclic demultiplexer is coupled to the optical splitter and connects to an optical receiver array configured to receive optical signals.

Author:

Feng Wang

ISBN #:

0792380630

Author:

Feng Wang

ISBN #:

7533645391