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91.发明专利
公开(公告)号：CA1249034A
公开(公告)日：1989-01-17
申请号：CA500730
申请日：1986-01-30
Applicant: MOTOROLA INC
Inventor： VAN TASSLE C RAY , FREEBURG THOMAS A
IPC: H04Q1/00
Abstract: METHOD AND APPARATUS FOR SHEDDING LOAD IN A COMMUNICATION CONTROLLER OF A DATA COMMUNICATIONS SYSTEM A data communications system is described that covers a geographic area divided into a plurality of nonoverlapping 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. Messages 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 from a portable radio. The GCC includes a multi-tasking processor that executes tasks on a priority basis. Inbound messages are processed on a high priority basis and are ignored if the GCC is overloaded and the inbound message is of the type that will be reasserted. Thus, by shedding inbound messages that will be re-asserted, the GCC can accomodate peak message loads demanding 100% of its capacity without becoming unstable.
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公开(公告)号：MX158046A
公开(公告)日：1988-12-28
申请号：MX19927983
申请日：1983-11-01
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A
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.
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公开(公告)号：CA1220546A
公开(公告)日：1987-04-14
申请号：CA458095
申请日：1984-07-04
Applicant: MOTOROLA INC
Inventor： KNEISEL THOMAS F , BALZANO QUIRINO , FREEBURG THOMAS A
Abstract: An adaptable homotropic antenna system for use with a portable communication transceiver (10) is described. The antenna system can be used for reception or transmission and can be completely enclosed within the portable transceiver housing. The homotropic antenna system evaluates the quality of a received signal (30) and if the signal is below a predetermined threshold level, an alternate antenna (13), (14) will be selected. The antenna system will continue to sample the available antennas (13), (14) until an antenna produces a signal of acceptable quality.
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公开(公告)号：CA1219638A
公开(公告)日：1987-03-24
申请号：CA439421
申请日：1983-10-20
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A
Abstract: A data communications sustem (Figure 1) is described that covers a geographic area divided into a plurality of non-overlapping zones (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.
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公开(公告)号：DE69735788D1
公开(公告)日：2006-06-08
申请号：DE69735788
申请日：1997-03-12
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A , GROSSMAN DANIEL B , ODLYZKO PAUL
Abstract: A radio communications system (10) having a mobile station (30) and at least two base stations (13, 14). ATM radio channels (31, 32) are provided between the remote station and base stations. Each of the ATM channels supports communication though ATM cells over a common frequency band. At least one ATM node (21) is coupled to the base stations. A base station controller (11) is coupled to the ATM node. The base station controller has a combiner (303) for combining cell streams received from the first and second base stations and an ATM signalling circuit (330) for sending ATM commands to the ATM node for dividing cell streams at the ATM node to the first and second base stations. The remote station (30) has a logic unit (520) for combining cell streams received from the first and second base stations during a handoff from the first base station to the second base station.
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Patent Agency Ranking
公开(公告)号：ES2143500T3
公开(公告)日：2000-05-16
申请号：ES93901904
申请日：1992-12-28
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A , BURKE DENNIS E , ODLYZKO PAUL
Abstract: A communications system having a plurality of different radio-types (528, 530 and 532) when integrated into a single node or control module (500) provides communications with a plurality of different end users (502, 506 and 508) having different transmission protocols. The steps involved comprise coupling the plurality of communication devices (528, 530 and 532) together via a bus (526) and coupling at least one processing unit (517) to the bus (526). Signals received by RF devices (528, 530 and 532) are communicated onto the bus (526) and processed by the processing unit (517) into processed signals. Processed signals comprise data and control information which are stored in memory (522). Thereafter, the processed signals stored in memory (522) are returned back onto the bus (526) for use by at least one of the plurality of communication devices (528, 530 and 532).
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公开(公告)号：DE69226886T2
公开(公告)日：1999-04-29
申请号：DE69226886
申请日：1992-01-16
Applicant: MOTOROLA INC
Inventor： DUCH KRZYSTOF , FREEBURG THOMAS A
Abstract: An apparatus scales binary samples representing a predetermined waveform (109) to achieve every possible transition in a multi-level transmission system. The predetermined waveform (109) is partitioned into M symbol intervals, each symbol interval having a corresponding waveform represented by a series of binary samples V stored in M separate ROM devices (311-316). Depending on the required amplitude and polarity of the transition, logic blocks (351-356) control scaling multipliers (321-326) and polarity multipliers (331-336) to perform the required scaling and inverting of the binary samples retrieved from ROM (311-316). The scaled and inverted samples are added together by an adder (345) and sent to a D/A converter (350) where the desired scaled and inverted waveform is converted/generated from the scaled and inverted binary samples.
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公开(公告)号：SG54119A1
公开(公告)日：1998-11-16
申请号：SG1996000938
申请日：1995-02-06
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A , JACKSON IRVIN RILEY , LEY JOHN
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公开(公告)号：AT169434T
公开(公告)日：1998-08-15
申请号：AT91920269
申请日：1991-03-01
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A
Abstract: There is provided a mechanism for networking satellite and terrestrial networks. It comprises: maintaining subscriber-received power levels of terrestrial network transmissions about one order of magnitude above co-channel satellite transmissions to overcome interference and maintaining subscriber transmissions to terrestrial networks at power levels about one order of magnitude of the below co-channel transmissions to satellite networks to avoid causing interference at the satellite. Such power level maintenance is provided by the network in communication with such subscriber. Moreover, a non-orbiting ("grounded") satellite cooperates as a switching node of both the satellite network and a terrestrial network to relay information between a terrestrial subscriber and the satellite radiotelephone network over a terrestrial network. The terrestrial network and the satellite network may communicate via either the inter-satellite spectrum or the terrestrial-to-satellite spectrum.
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公开(公告)号：DE69031247T2
公开(公告)日：1998-02-19
申请号：DE69031247
申请日：1990-05-30
Applicant: MOTOROLA INC
Inventor： FREEBURG THOMAS A
Abstract: There is provided a scheme for bit error rate detection. It is characterised by: detecting the bit value present in a received multi-level signal (102), more narrowly detecting the bit value present in that received multi-level signal (104), comparing the results of narrow detection with the results detected otherwise to identify errors in detection (203, 206, 207 and 209), and accumulating detected symbol errors over unit time. Bit error rate detection can be used for antenna selection-selecting one of a plurality of diversity antennas when the error rate exceeds (213) a certain error threshold.
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