John R Haug

US Patent:

53923006, Feb 21, 1995

Filed:

Nov 10, 1992

Appl. No.:

7/973896

Inventors:

David E. Borth - Palatine IL
John R. Haug - Arlington Heights IL
Phillip D. Rasky - Buffalo Grove IL
Gregory M. Chiasson - Barrington IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

G06F 1110

US Classification:

371 377

Abstract:

A dual mode radio communication unit for a digital communication system is provided having an error controller including an error detection encoder and a forward error correction encoder which encode an input information signal into an error protected data bit stream. In addition, the communication unit includes a mode selector which enables either the error detection encoder or the forward error correction encoder used with a particular mode of operation of the communication unit. Further, a corresponding dual mode radio communication unit is provided having an error controller for generating estimated information signal samples according to a group of algorithms consisting of either an error detection algorithm or an error correction algorithm. In addition, the corresponding communication unit includes a mode selector for receiving a signal according to a particular one of the group of algorithms which is associated with a particular mode of operation of the corresponding communication unit.

US Patent:

53814436, Jan 10, 1995

Filed:

Oct 2, 1992

Appl. No.:

7/955793

Inventors:

David E. Borth - Palatine IL
John R. Haug - Arlington Heights IL
Phillip D. Rasky - Buffalo Grove IL

Assignee:

Motorola Inc. - Schaumburg IL

International Classification:

H04L 2730

US Classification:

375 1

Abstract:

A cellular communication system hops both signalling channels and traffics channels in a common hopping sequence. To obtain system information from the frequency hopping signalling channel, a subscriber unit waits on a predetermined frequency, or carrier, until the frequency hopped signalling channel arrives at the predetermined frequency. Once arrived, the subscriber unit obtains synchronization information, and information related to the hopping sequence, from the signalling channel during the hop. The subscriber unit may then hop in tandem with the system, obtaining further system information in subsequent hops. The cellular communication system supports mobile assisted handoff (MAHO) by allowing a subscriber unit to measure signalling channel of neighboring cells in a similar manner, and using the measurements to assist in communication handoff from a source cell to a neighboring cell.

US Patent:

55749739, Nov 12, 1996

Filed:

Mar 16, 1995

Appl. No.:

8/405572

Inventors:

David E. Borth - Palatine IL
John R. Haug - Arlington Heights IL
Phillip D. Rasky - Buffalo Grove IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04Q 722

US Classification:

455 331

Abstract:

Registration operates by sensing (106) the availability of a first communication system. A quality factor of a channel of the system is measured (111). A channel of the first system is selected if the quality factor of the channel exceeds a threshold (113). If selected, the subscriber attempts to register the call (114). If the registration fails, the availability of a second communication system is sensed (107). A quality factor of a channel of the second system is measured (111) and selected (113), if the quality factor exceeds a threshold. The subscriber will then attempt to register (114) with the second system. Reassignment operates by determining if the first system has reached a capacity limit (126). If it has, it determines if a channel on the second system is available (128). If available, a transfer of the call from the first to the second system will be attempted (132).

US Patent:

44005857, Aug 23, 1983

Filed:

Jan 23, 1981

Appl. No.:

6/227901

Inventors:

Richard A. Kaman - Lake Zurich IL
Kenneth A. Felix - Crystal Lake IL
Philip J. Smanski - Palatine IL
John R. Haug - Mount Prospect IL

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04M 1100

US Classification:

179 2EB

Abstract:

Apparatus is disclosed for enabling a mobile radiotelephone to automatically attempt to seize a radio channel in a multichannel radio communication system. The mobile radiotelephone scans the radio channels for a non-busy radio channel and provides an indication signal when detecting a non-busy radio channel. A counter which is continuously clocked by a clock signal is incremented for each clock cycle interval of the clock signal in response to the presence of the indication signal and is decremented for each clock cycle interval of the clock signal in response to the absence of the indication signal. Thus, the totalized count of the counter is proportional to the degree of radio channel blocking of the radiotelephone system. After an unsuccessful channel seizure attempt by the mobile radiotelephone user, time interval generating circuitry provides a random time interval that has a maximum magnitude that is inversely proportional to the totallized count of the counter. Thus, the maximum random time interval is shortest when the totallized count of the counter is greatest.

US Patent:

57128685, Jan 27, 1998

Filed:

Jun 30, 1992

Appl. No.:

7/906785

Inventors:

Morton Stern - Skokie IL
John S. Csapo - Glenview IL
David Edward Borth - Palatine IL
Charles N. Lynk - Bedford TX
John Richard Haug - Arlington Heights IL
Eric R. Schorman - Bedford TX
Phillip David Rasky - Buffalo Grove IL
Walter Joseph Rozanski - Hurst TX

Assignee:

Motorola, Inc. - Schaumburg IL

International Classification:

H04B 7216
H04J 1302
H04J 1306

US Classification:

375200

Abstract:

The dual mode communication network comprises a first communication system having a frame structure and a first traffic channel protocol and a second communication system having the frame structure and a second traffic channel protocol. In the network, only one of the first and second traffic channel protocols supports forward error correction coding.