公开(公告)号：AT36105T

公开(公告)日：1988-08-15

申请号：AT84902851

申请日：1984-06-28

Applicant: MOTOROLA INC

Inventor： KREBS JAY ,  FREEBURG THOMAS ARTHUR

IPC: G08B5/22 ,  H04J3/06 ,  H04L5/22 ,  H04L13/00

公开(公告)号：MX153263A

公开(公告)日：1986-09-02

申请号：MX19818083

申请日：1983-07-27

Applicant: MOTOROLA INC

Inventor： BURKE TIMOTHY MARK ,  NOBLE SCOTT WILLIAM ,  KREBS JAY ROBERT ,  FREEBURG THOMAS ARTHUR

IPC: H04B7/26 ,  H04M7/04 ,  H04W88/02 ,  H04B1/10 ,  H04J13/00 ,  H04J3/22 ,  H04J3/24

Abstract: A data signalling system for transmitting signals between at least one primary station and a plurality of secondary stations. The system is well adapted for use in multiple unit radio communications systems capable of noise and data communications. A register model is utilized which permits a highly flexible signalling system compatable with a wide range of communications networks. Data transfer is accomplished using fixed length data packets which are error correction encoded and transmitted utilizing PSK modulation.

公开(公告)号：DK342384D0

公开(公告)日：1984-07-12

申请号：DK342384

申请日：1984-07-12

Applicant: MOTOROLA INC

Inventor： FREEBURG THOMAS ARTHUR

IPC: H04B20060101 ,  H04B7/26 ,  H04B

公开(公告)号：NO842801A

公开(公告)日：1984-07-10

申请号：NO842801

申请日：1984-07-10

Applicant: MOTOROLA INC

Inventor： FREEBURG THOMAS ARTHUR

IPC: H04B20060101 ,  H04B7/26 ,  H04B

公开(公告)号：AU525626B2

公开(公告)日：1982-11-18

申请号：AU4457579

申请日：1979-02-26

Applicant: MOTOROLA INC

Inventor： DOLIKIAN ARMAN VAHE ,  FREEBURG THOMAS ARTHUR

IPC: H04B1/04 ,  H04B1/54 ,  H04B7/26 ,  H04B1/02 ,  H04B17/00

Abstract: A mobile data terminal system is capable of voice or microprocessor controlled data transmission over a keyed transmitter. The improved timer apparatus disables further transmission if the transmission duration or the average duty cycle over a predetermined time period of repeated transmitter keying exceed predetermined limits. Where the disable mode resulted from a microprocessor fault, the transmitter continues to be disabled until the microprocessor is reset.

公开(公告)号：EP0127641A4

公开(公告)日：1985-10-01

申请号：EP83903706

申请日：1983-10-18

Applicant: MOTOROLA INC

Inventor： FREEBURG THOMAS ARTHUR

IPC: H04B7/26 ,  H04B7/08 ,  H04W68/00

CPC classification number: H04W68/00 ,  H04B7/0851

Abstract: A data communications system (Figure 1) that covers a geographic area divided into a plurality of non-overlapping zone (Figure 2) and includes a general communications controller (GCC, 104), a plurality of channel communications modules (CCM 106, 108, 110, 112) and associated transmitters (114, 120, 124) and receivers (116, 118, 122, 126, 128), and a plurality of portable radios (130, 132, 134). Message signals carrying alphanumeric information are communication between the GCC (104) and the portable radios (130, 132, 134) by way of a radio channel. Each CCM (106, 108, 110, 112) takes a signal strength measurement every time it receives a message signal from a portable radio (130, 132 or 134). The GCC (104) gathers the signal strength measurements from the CCM receivers (116, 118, 122, 126, 128) receiving the same message signal and computes an adjusted signal strength for each zone. The GCC (104) then selects the zone having the largest adjusted signal strength for determining the location of the portable radio (130, 132 or 134) that transmitted the message signal. Whenever the GCC (104) transmits a message signal to a portable radio, the CCM transmitter (114, 120, 124) is used that covers the zone having the largest adjusted signal strength for the last transmission from that portable radio (130, 132, 134). Since the GCC (104) can be simultaneously transmitting message signals to portable radios (130, 132, 134) in other zones using non-interfering CCM transmitters (114, 120, 124), information throughput is greatly enhanced.

公开(公告)号：DE3382799T2

公开(公告)日：1996-07-25

申请号：DE3382799

申请日：1983-10-18

Applicant: MOTOROLA INC

Inventor： FREEBURG THOMAS ARTHUR

IPC: H04B7/26 ,  H04B7/08 ,  H04W68/00 ,  H04Q7/38

Abstract: A data communications system is described that covers a geographic area divided into a plurality of non-overlapping zones and includes a general communications controller (GCC), a plurality of channel communications modules (CCM) and associated transmitters and receivers, and a plurality of portable radios. Message signals carrying alphanumeric information are communicated between the GCC and the portable radios by way of a radio channel. Each CCM takes a signal strength measurement every time it receives a message signal from a portable radio. The GCC gathers the signal strength measurements from the CCM receivers receiving the same message signal and computes an adjusted signal strength for each zone. The GCC then selects the zone having the largest adjusted signal strength for determining the location of the portable radio that transmitted the message signal. Whenever the GCC transmits a message signal to a portable radio, the CCM transmitter is used that covers the zone having the largest adjusted signal strength for the last transmission from that portable radio. Since the GCC can be simultaneously transmitting message signals to portable radios in other zones using non-interfering CCM transmitters, information throughput is greatly enhanced.

公开(公告)号：DE3382799D1

公开(公告)日：1996-02-15

申请号：DE3382799

申请日：1983-10-18

Applicant: MOTOROLA INC

Inventor： FREEBURG THOMAS ARTHUR

IPC: H04B7/26 ,  H04B7/08 ,  H04W68/00 ,  H04Q7/38

Abstract: A data communications system is described that covers a geographic area divided into a plurality of non-overlapping zones and includes a general communications controller (GCC), a plurality of channel communications modules (CCM) and associated transmitters and receivers, and a plurality of portable radios. Message signals carrying alphanumeric information are communicated between the GCC and the portable radios by way of a radio channel. Each CCM takes a signal strength measurement every time it receives a message signal from a portable radio. The GCC gathers the signal strength measurements from the CCM receivers receiving the same message signal and computes an adjusted signal strength for each zone. The GCC then selects the zone having the largest adjusted signal strength for determining the location of the portable radio that transmitted the message signal. Whenever the GCC transmits a message signal to a portable radio, the CCM transmitter is used that covers the zone having the largest adjusted signal strength for the last transmission from that portable radio. Since the GCC can be simultaneously transmitting message signals to portable radios in other zones using non-interfering CCM transmitters, information throughput is greatly enhanced.

公开(公告)号：DK170082B1

公开(公告)日：1995-05-15

申请号：DK170484

申请日：1984-03-28

Applicant: MOTOROLA INC

Inventor： BURKE TIMOTHY MARK ,  FREEBURG THOMAS ARTHUR ,  KREBS JAY ROBERT ,  NOBLE SCOTT WILLIAM

IPC: H04B1/10 ,  H04B7/26 ,  H04M7/04 ,  H04W88/02 ,  H04Q7/00 ,  H04B1/00

Abstract: A data signalling system for transmitting signals between at least one primary station and a plurality of secondary stations. The system is well adapted for use in multiple unit radio communications systems capable of noise and data communications. A register model is utilized which permits a highly flexible signalling system compatable with a wide range of communications networks. Data transfer is accomplished using fixed length data packets which are error correction encoded and transmitted utilizing PSK modulation.

公开(公告)号：NO169415B

公开(公告)日：1992-03-09

申请号：NO841205

申请日：1984-03-27

Applicant: MOTOROLA INC

Inventor： BURKE TIMOTHY MARK ,  FREEBURG THOMAS ARTHUR ,  KREBS JAY ROBERT ,  NOBLE SCOTT WILLIAM

IPC: H04B7/26 ,  H04M7/04 ,  H04B1/10 ,  H04W88/02 ,  H04B1/00 ,  H04Q7/00

Abstract: A data signalling system for transmitting signals between at least one primary station and a plurality of secondary stations. The system is well adapted for use in multiple unit radio communications systems capable of noise and data communications. A register model is utilized which permits a highly flexible signalling system compatable with a wide range of communications networks. Data transfer is accomplished using fixed length data packets which are error correction encoded and transmitted utilizing PSK modulation.