George D Kondylis

US Patent:

6665311, Dec 16, 2003

Filed:

Nov 9, 2001

Appl. No.:

10/007321

Inventors:

George Kondylis - Palo Alto CA
Bong K. Ryu - Thousand Oaks CA
Mahesh Marina - Farmingville NY
Ulas Kozat - Greenbelt MD

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H04J 1228

US Classification:

370462, 370461

Abstract:

An apparatus, a method, and a computer program product for effective communication routing of unicast and broadcast data traffic in wireless ad-hoc networks are presented. The routing technique separates the signaling and data transmission portions of a data frame such that the length of the signaling portion is independent of the length of the data portion. In the signaling portion, reservations are able to be performed and confirmed, while the data portion also includes a reservation confirmation portion which allows reservations made in during the signaling portion of the frame to be confirmed immediately prior to transmission of the data. In addition, the present invention also provides a mechanism for dynamically adjusting reservations.

US Patent:

6807158, Oct 19, 2004

Filed:

Aug 7, 2001

Appl. No.:

09/924958

Inventors:

Srikanth Krishnamurthy - Riverside CA
Mohin Ahmed - Los Angeles CA
George D. Kondylis - Palo Alto CA

Assignee:

HRL Laboratories, LLC - Malibu CA

International Classification:

H04B 7185

US Classification:

370316, 370331, 370338, 455 131

Abstract:

A wireless hybrid network consisting at least one satellite and a plurality mobile ad hoc nodes. The nodes are assumed to be clustered into mobile groups within the footprint of the satellite , and the objective is to enable reliable communications between the various nodes. At least one relatively powerful gateway , also mobile, is deployed for each cluster of nodes to facilitate communication with a LEO or GEO satellite. The environment is characterized by the presence of terrestrial barriers or other severe channel impairments. One of the goals of the invention is to provide a mechanism by which a mobile gateway can change its position or define its trajectory based on the position and loading of the nodes in an ad hoc network, so as to optimize certain pre-defined performance criterion, such as power, overhead, throughput.

US Patent:

7555268, Jun 30, 2009

Filed:

Dec 19, 2003

Appl. No.:

10/741665

Inventors:

Jason A. Trachewsky - Menlo Park CA, US
Tim Robinson - Boulder Creek CA, US
George Kondylis - Palo Alto CA, US
Ling Su - Sunnyvale CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04B 1/66
H04B 17/00

US Classification:

455102, 4551153, 4551272, 455522, 375297

Abstract:

A radio frequency transmitter includes a baseband transmit processing module, a mixing module, a power amplifier, a transmit power sense module, and a transmit power control module. The baseband transmit processing module is operably coupled to encode outbound data into outbound baseband signals in accordance with one of a plurality of encoding protocols. The mixing module is operably coupled to convert the outbound baseband signals into outbound radio frequency signals. The power amplifier is operably coupled to amplify the outbound RF signals prior to transmission to produce amplified outbound RF signals. The transmit power sense module is operably coupled to sense the amplified outbound RF signals to provide a transmit signal strength indication (TSSI). The transmit power control module is operably coupled to adjust gain of the baseband transmit processing module, the mixing module, and/or the power amplifier based on the TSSI and the particular encoding protocol used to produce the baseband signals.

US Patent:

7590189, Sep 15, 2009

Filed:

Feb 14, 2005

Appl. No.:

11/056155

Inventors:

Christopher J. Hansen - Sunnyvale CA, US
Jason Alexander Trachewsky - Menlo Park CA, US
Amit G. Bagchi - Mountain View CA, US
George Kondylis - Palo Alto CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 27/00

US Classification:

375295, 375259

Abstract:

Methods, devices and systems for wireless communication generate signals by determining whether legacy devices are within a proximal region of the wireless communication. When at least one legacy device is within the proximal region, a frame is formatted to include a preamble field, a signal field, and a data field. Further, the uncoded bits are encoded according to a coding format. The coding format is determined according to bits in the preamble and applicable sub-field lengths.

US Patent:

7706338, Apr 27, 2010

Filed:

Jul 14, 2005

Appl. No.:

11/181548

Inventors:

George D. Kondylis - Palo Alto CA, US
Ling Su - Cupertino CA, US
Neal Nuckolls - Mountain View CA, US
Bruce E. Edwards - Belmont MA, US
Matthew J. Fischer - Mountain View CA, US
Jason Trachewsky - Menlo Park CA, US
Stephen R. Palm - Irvine CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04W 4/00

US Classification:

370338, 370445

Abstract:

A method and system for a bandwidth efficient medium access control (MAC) protocol is provided, which may comprise communicating a request to transmit (RTS) signal to a receiving station to determine if a channel is available for transmission. A clear to send (CTS) acknowledgement signal may be received from the receiving station if the channel is available for transmission. A plurality of medium access control (MAC) protocol data unit (MPDU) fragments separated by a point coordination function (PCF) interframe space (PIFS) interval may be transmitted in response to the received CTS acknowledgement signal.

US Patent:

7751429, Jul 6, 2010

Filed:

Oct 26, 2004

Appl. No.:

10/973611

Inventors:

Jason A. Trachewsky - Menlo Park CA, US
George Kondylis - Palo Alto CA, US
Amit G. Bagchi - Mountain View CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04J 3/16

US Classification:

370465, 370280, 370328, 370349

Abstract:

A method for wireless communication begins by determining whether legacy devices are within a proximal region of the wireless communication. The method continues, when at least one legacy device is within the proximal region, formatting a frame to include: a legacy preamble; a signal field; an extended preamble; at least one additional signal field; at least one service field; an inter frame gap; and a data field.

US Patent:

7813448, Oct 12, 2010

Filed:

Oct 31, 2006

Appl. No.:

11/589924

Inventors:

George Kondylis - Palo Alto CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 27/00

US Classification:

375299, 375220

Abstract:

A system includes a first transmitter, a second transmitter, and a legacy receiver. The first transmitter transmits information via a first channel to the legacy receiver. The second transmitter transmits a time-shifted version of the information via a second channel to the legacy receiver. The legacy receiver combines the information received via the first channel and the time-shifted information received via the second channel to provide combined information. The legacy receiver processes the combined information as though it is received via a single channel.

US Patent:

7817740, Oct 19, 2010

Filed:

Feb 9, 2006

Appl. No.:

11/350419

Inventors:

Ling Su - Cupertino CA, US
George Kondylis - Palo Alto CA, US

Assignee:

Broadcom Corporation - Irvine CA

International Classification:

H04L 5/12

US Classification:

375262, 375259, 375260, 375261, 375263, 375264, 714792, 714794, 714795

Abstract:

Various aspects of a method for minimum mean square error soft interference cancellation (MMSE-SIC) based sub-optimal maximum likelihood (ML) detection for a multiple input multiple output (MIMO) wireless system may comprise selecting at least one constellation point in a constellation map based on at least one of a plurality of received symbols. A number of the at least one constellation point may be less than or equal to a number of previously selected constellation points in a previous constellation map. At least one of the plurality of received symbols may be decoded based on the selected at least one constellation point.