Shawn Wesley Hogberg

US Patent:

6366775, Apr 2, 2002

Filed:

Mar 8, 1999

Appl. No.:

09/263551

Inventors:

James W. Startup - Chandler AZ
Jim E. Helm - Gilbert AZ
Shawn Wesley Hogberg - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 720

US Classification:

455427, 455428, 455 121, 342354, 3423571

Abstract:

A method and apparatus for acquiring satellite signals and subscriber unit signals utilizes broadcast beams ( ) and acquisition beams ( ) projected from a satellite ( ). The broadcast beams ( ) and acquisition beams ( ) form broadcast acquisition beam pairs that are swept within the footprint ( ) of the satellite ( ) on the surface of the earth. Broadcast bursts are transmitted by the satellite ( ) in the broadcast beams ( ), and acquisition bursts broadcast by subscriber units ( ) are received by the satellite ( ) in acquisition beams ( ).

US Patent:

6377540, Apr 23, 2002

Filed:

Jul 31, 1998

Appl. No.:

09/126651

Inventors:

Shawn Wesley Hogberg - Chandler AZ
Gerald Joseph Davieau - Eldersburg MD

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G01R 3108

US Classification:

370216, 370321, 370310, 370344, 705205

Abstract:

A conflict resolution center ( FIG. ) is used to manage and resolve resource allocation conflicts in communications system ( ) including a number of semi-autonomous communications nodes (SACNs). SACN ( ) operates semi-autonomously because SACNs cannot independently allocate and de-allocate resources but rather operate within the confines of at least one local neighborhood. SACNs ( ) allocate and de-allocate resources locally based on local neighborhood information. A conflict occurs when at least two SACNs try to allocate the same resource. Conflict resolution center ( ) resolves conflicts using a number of different procedures. When a conflict can be resolved, conflict resolution center ( ) provides resource reallocation data to at least one SACN ( ). When a conflict cannot be resolved, conflict resolution center ( ) notifies a system administrator.

US Patent:

6411609, Jun 25, 2002

Filed:

Nov 9, 1999

Appl. No.:

09/436572

Inventors:

Robert Anthony Peters - Silver Spring MD
Shawn Hogberg - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7212

US Classification:

370321, 370280, 370294, 370316, 370331, 455 121, 455 131

Abstract:

A satellite communication system uses dual satellite coverage techniques to simulate the provision of full duplex communications in the system. Each subscriber ( ) in the system communicates with two satellites ( ) that use complementary time division duplex (TDD) frame structures ( ) for communicating with the subscriber ( ). In one embodiment, each satellite in the system performs a transition between a first TDD frame structure ( ) and a second TDD frame structure ( ) while travelling through a transition region ( ) of an associated orbit ( ). Preferably, the transition is performed gradually so that an abrupt reduction in system capacity is avoided. In another embodiment, individual orbital planes in the satellite system are dedicated for use with particular TDD frame structures. A subscriber thus communicates with one satellite in each of two planes during a connection.

US Patent:

6490448, Dec 3, 2002

Filed:

Dec 10, 1999

Appl. No.:

09/459001

Inventors:

Shawn Wesley Hogberg - Chandler AZ
Jonathan Henry Gross - Gilbert AZ
Gerald Joseph Davieau - Eldersburg MD

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 720

US Classification:

455427, 455429, 455430, 455 121, 455 133, 455 134, 342354

Abstract:

A satellite communications system ( ) provides for snap to grid variable beam size digital beamforming. The communications system ( ) has an antenna configuration ( ) for maintaining communications links with satellite networking equipment, and a signal processing system ( ) for processing signals resulting from the communications links. The beamforming subsystem ( ) forms beams based on the processed signals wherein the beams match predetermined grid information. The beamforming subsystem ( ) includes a grid database ( ) containing predetermined grid information. A beamforming processor ( ) converts the predetermined grid information contained in the grid database ( ) antenna coefficients. An antenna management system forms beams based on the antenna coefficients.

US Patent:

6522636, Feb 18, 2003

Filed:

Oct 1, 1999

Appl. No.:

09/411727

Inventors:

Shawn Hogberg - Chandler AZ
Jerry Davieau - Eldersburg MD

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7185

US Classification:

370316, 455 121, 244158 R

Abstract:

A method and apparatus are provided for managing the communications traffic load handled by one or more satellites ( ) within a satellite communications system ( ) while staying within the capacity of on-board electrical power resources ( FIG. ). A forecast of the communications traffic load for a future time period is generated, using historical traffic data. Based in part upon the current onboard power capacity, predicted solar-charging conditions, and predicted traffic load, a forecast of the battery state of charge throughout the future time period is generated. If the forecast communications traffic load exceeds the forecast level of on-board power resources for the future time period, the method and apparatus undertake various remedial measures, including flow control, moving subscribers to low power channels, and terminating subscriber connections.

US Patent:

6556809, Apr 29, 2003

Filed:

Nov 22, 1999

Appl. No.:

09/447313

Inventors:

Jonathan Henry Gross - Gilbert AZ
Shawn Hogberg - Chandler AZ
James William Startup - Tempe AZ
Robert Anthony Peters - Silver Spring MD

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7185

US Classification:

455 121, 455 133, 4552781, 455562

Abstract:

A beam control subsystem ( , FIG. ) provides acquisition, synchronization, and traffic beams ( , FIG. ) to communication devices ( ) within a footprint ( ) of a system node ( ), where each beam comprises a set of beamlets ( ). The subsystem ( , FIG. ) first acquires ( , FIG. ) and synchronizes ( , FIG. and FIG. ) with each communication device. Acquisition involves selecting ( , FIG. ) and combining ( ) sets of beamlets ( , FIG. ), and determining whether any devices within the sets are attempting to acquire the system. If so, synchronization is performed by varying ( , FIG. ) beamlet weighting coefficients to find, based on modem feedback, a combination of coefficients that yields a maximum signal-to-interference+noise ratio for multiple users within a beam. The communication device is then handed off ( ) to a traffic beam. The subsystem ( ) continues, based on modem feedback, to adapt ( , FIG.

US Patent:

6570858, May 27, 2003

Filed:

Nov 1, 1999

Appl. No.:

09/431641

Inventors:

Robert Anthony Peters - Silver Spring MD
Shawn Hogberg - Chandler AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7212

US Classification:

370321, 370280, 370294, 370293, 370347, 455427, 455 131, 455 121

Abstract:

A satellite-based communications system ( ) includes a communication satellite ( ) using a Time Division Duplex (TDD) frame structure. The communication satellite ( ) transmits first data ( ) during a first sub-frame ( ) and receives second data ( ) during a second sub-frame ( ) of a time division multiple access (TDMA) frame ( ). A terrestrial repeater ( ) receives the first data ( ) using a first link ( ) during the first sub-frame ( ), delays the first data ( ) by a sub-frame duration, and transmits the first data ( ) to a subscriber unit ( ) using a second link ( ). The terrestrial repeater ( ) receives the second data ( ) from the subscriber unit ( ) using the second link ( ), delays the second data ( ) by the sub-frame duration, and transmits the second data ( ) using the first link ( ) to the satellite ( ) during the second sub-frame ( ).

US Patent:

6571102, May 27, 2003

Filed:

Aug 8, 2000

Appl. No.:

09/634426

Inventors:

Shawn Hogberg - Chandler AZ
Daniel R. Tayloe - Phoenix AZ
James Powers Redden - Mesa AZ

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 720

US Classification:

455450, 455509, 455436, 370329

Abstract:

A narrowband communication system provides wideband data services in a secondary service band. This limits the impact on primary services in peak traffic regions in that the primary service band is not required to download wideband data from a communication node (e. g. , a satellite) to a mobile terminal. The narrowband communication system implements a handoff protocol ( ) that rate negotiates a channel bandwidth of an active connection ( ) to the amount of channels that are available in a new cell. The narrowband communication system preempts ( ) lower priority subscribers when a higher priority ( ) high-speed data terminal requires access to the system and a requested channel assignment is not available ( ). The complexity of a high-speed data terminal communication chipset is reduced by a receiver design that minimizes the range of frequencies that are required to be demodulated.