Minh N Hoang

US Patent:

6404807, Jun 11, 2002

Filed:

Feb 4, 2000

Appl. No.:

09/498105

Inventors:

Sepehr Mehrabanzad - Southborough MA
Minh Hoang - Stoughton MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04L 516

US Classification:

375222, 375377, 370465

Abstract:

A method and apparatus for achieving the fastest possible data transmission rate, symmetric, near symmetric, or a specific data transmission rate between multiple analog modems. The invention comprises a multimedia unit comprising of two (or more) digital modems and a controller section. The controller provides the interface between the two (or more) digital modems. When a user attempts to send data from a first analog modem to a second analog modem, the user calls the first digital modem in the network. Next, the first digital modem establishes a connection with the second digital modem through the controller section which is partitioned in two segments. Controller segments may be co-located or located in different locations and connected through either Internet or PSTN. Then, the second digital modem dials up the second analog modem under direction of the controller. Subsequently, the controller commands the digital modems to establish a connection at the fastest possible symmetric rate, near-symmetric, or any other pre-configured rate.

US Patent:

6751302, Jun 15, 2004

Filed:

Jan 7, 2000

Appl. No.:

09/479679

Inventors:

Minh Hoang - Stoughton MA
Sepehr Mehrabanzad - Southborough MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1100

US Classification:

379 9307, 37922001, 37910012

Abstract:

A method and apparatus is provided for providing an automated selection of a telecommunication service from among multiple telecommunication services. In a telecommunication system ( ) that includes multiple communication devices ( ) and a telecommunication infrastructure ( ) including multiple local exchange offices ( ), multiple communication channels ( ), and multiple telecommunication services, a subscriber to the services of the telecommunication system is able to select a particular telecommunication service by transmitting a service request code via the subscribers communication device, which service request code corresponds to a request for a telecommunication service. The telecommunication infrastructure then enables or disables the requested telecommunication service in response to receiving the request.

US Patent:

6792481, Sep 14, 2004

Filed:

May 30, 2002

Appl. No.:

10/159632

Inventors:

Minh Hoang - Stoughton MA
Rajat Mitra - North Attleboro MA

Assignee:

Freescale Semiconductor, Inc. - Austin TX

International Classification:

G06F 1328

US Classification:

710 25, 710 29, 710 52

Abstract:

A DMA controller has both a receiving portion and a sending portion and may be used in a modem or other data transmission context. The DMA controller is intended to provide to or receive from data samples on a bus that may or may not be available. For the case when the bus is available, samples of data are either sent to or received from proper memory locations. When the bus is not available, the number of the samples that are missed due to the bus not being available is stored. This count is then used to ensure that the samples that are provided or received when the bus becomes available are stored in or read from the proper location to provide the samples at the proper time. The locations in which the samples were lost are provided with predetermined values.

US Patent:

20060198337, Sep 7, 2006

Filed:

Mar 7, 2005

Appl. No.:

11/073894

Inventors:

Minh Hoang - Stoughton MA, US
Daniel Grossman - Norwood MA, US
George Harvey - Bedford MA, US

International Classification:

H04Q 7/00
H04L 12/56
H04L 12/43

US Classification:

370329000, 370400000, 370458000

Abstract:

A method and apparatus () for operating a node within an ad-hoc communication system () is provided herein. A single-radio relay node () is used to link overlapping piconets operating on different radio channels. All nodes (-) within the ad-hoc communication system () operate on multiple channels, which differ for each associated piconet (). When relaying data between piconets, a node's transceiver () will be receiving data during a first time period on a first channel (the data transmitted from a first node existing in a first piconet). During a second time period, the transceiver () will relay the data over a second channel to a second node existing in a second piconet.

US Patent:

20070280481, Dec 6, 2007

Filed:

Jun 6, 2006

Appl. No.:

11/447429

Inventors:

Donald E. Eastlake - Milford MA, US
George A. Harvey - Marlborough MA, US
Minh N. Hoang - Stoughton MA, US

International Classification:

H04L 9/00

US Classification:

380277

Abstract:

A system and method of providing security in a wireless network is provided. A plurality of pre-shared keys is created. Each pre-shared key provides access to the wireless network. A list of the plurality of pre-shared keys is transmitted to an access point device in the wireless network so that the access point device can authenticate a station attempting to access the network by performing an analysis with the list of the plurality of pre-shared keys.

US Patent:

58021531, Sep 1, 1998

Filed:

Feb 28, 1996

Appl. No.:

8/607911

Inventors:

Manickam R. Sridhar - Holliston MA
Minh Hoang - Stoughton MA
John Wortman - West Roxbury MA
Timothy A. Lis - Framingham MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1100

US Classification:

379 98

Abstract:

An apparatus (101) and method for interfacing between a processor (103) and a communications channel (105), the processor operable in data terminal equipment (102) such as a computer having a communications application program, to provide for data transmission and reception over a communications channel (105), utilizing the computer processor without additional or redundant microprocessor or digital signal processor components. The apparatus and method provide for data transfer between the interface apparatus (101 ) and the communications channel (105) at a first, determinate frequency corresponding to a specific data transmission rate. The apparatus and method provide for data transfer between the interface apparatus (101) and the processor (103) at a second, indeterminate frequency, and provides for interim data storage in memory (115) between data transmission (or data reception) and data processing, such as modulation and demodulation, by the computer processor (103). The apparatus and method further provide for generating an interrupt signal to the processor to indicate the presence of received data for processing and the absence of digital data for transmission.

US Patent:

57990646, Aug 25, 1998

Filed:

Aug 31, 1995

Appl. No.:

8/521717

Inventors:

Manickam R. Sridhar - Holliston MA
Minh Hoang - Stoughton MA
John Wortman - West Roxbury MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1100

US Classification:

379 98

Abstract:

An apparatus (101) and method for interfacing between a processor (103) and a communications channel (105), the processor operable in data terminal equipment (102) such as a computer having a communications application program, to provide for data transmission and reception over a communications channel (105), utilizing the computer processor without additional or redundant microprocessor or digital signal processor components. The apparatus and method provide for data transfer between the interface apparatus (101) and the communications channel (105) at a first, determinate frequency corresponding to a specific data transmission rate. The apparatus and method provide for data transfer between the interface apparatus (101) and the processor (103) at a second, indeterminate frequency, and provides for interim data storage in memory (115) between data transmission (or data reception) and data processing, such as modulation and demodulation, by the computer processor (103). The apparatus and method further provide for generating an interrupt signal to the processor to indicate the presence of received data for processing and the absence of digital data for transmission.

US Patent:

59251140, Jul 20, 1999

Filed:

Mar 21, 1997

Appl. No.:

8/823304

Inventors:

Minh Hoang - Stoughton MA

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G06F 1300
G06F 1314
G06F 1516

US Classification:

710 48

Abstract:

A software implementation of a modem, particularly designed to execute on a general purpose host processor, controlled by a non-real-time, multi-tasking operating system (OS), such as the Windows 95 OS. The software modem is scaleable and portable. In this fashion, communication protocols (particularly datapumps) may be easily added to, or removed from, the system, and the modem may be easily adapted for use on other types of processors and operating systems. The controller and datapump portions execute as a plurality of interacting subsystems, each of which can execute at at least one of several priority levels. A HRT level routine is responsible for handling an ASIC that buffers transmit and receive samples destined to and received from the phone lines. A SRT level task includes logic that needs time functionality, but which is not time-critical like the HRT logic. BRT routines execute in an event-driven basis and are used for many controller functions.

Address:

654 Woodland Ave, Cherry Hill, NJ 08002

VIN:

5J8TB18537A008368

Make:

ACURA

Model:

RDX

Year:

2007