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公开(公告)号：GB2289825B
公开(公告)日：1998-09-16
申请号：GB9409939
申请日：1994-05-18
Applicant: MOTOROLA INC
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公开(公告)号：GB2294844A
公开(公告)日：1996-05-08
申请号：GB9422449
申请日：1994-11-07
Applicant: MOTOROLA INC
Abstract: A common communications system 19 provides information regarding the availability of other communication systems 11-17 within the common communications system coverage area to a generic, programmable subscriber unit 20. The subscriber unit then selects one of the communications systems and receives enabling programming from the communication system. The enabling programming permits the subscriber unit to configure itself to operate on the selected communication system.
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公开(公告)号：FI943189A0
公开(公告)日：1994-07-01
申请号：FI943189
申请日：1994-07-01
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：GB2268027A
公开(公告)日：1993-12-22
申请号：GB9213209
申请日：1992-06-20
Applicant: MOTOROLA INC
Abstract: A trunking radio system comprises a central station and at least one remote station for communication with the central station over a plurality of frequency-divided radio channels. The central station comprises: a transmitter 10 for transmitting a plurality of signals to different remote units on different channels; a trunking controller 12 for allocating channels to different remote units, said trunking controller having traffic monitoring means for monitoring the excess number of channels over the number of remote units having channels allocated; signalling means for signalling to a remote unit to allocate a channel to the remote unit, said signalling means being responsive to the traffic monitoring means to signal to a remote unit to allocate (203, 205, 206) at least two channels to that remote unit when there is at least one excess channel and diversity means 21 responsive to the traffic monitoring means, for receiving signals from the remote unit over said at least two channels. The remote unit composes: a receiver for receiving signalling from the central station and diversity transmitting means (34, 35, 39) responsive to said signalling for transmitting a signal over said at least two channels.
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公开(公告)号：RO119671B1
公开(公告)日：2005-01-28
申请号：RO9401115
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: The invention relates to a radiotelephony system with time division multiple access (TDMA) with the resource distribution (trunked) which uses a specific structure of the transmission frames, for the communication between different fixed, mobile and portable radiotelephony units used within such a system. According to the invention, the radiotelephony system comprises a base station (6) and a plurality of remotely located radiotelephony units (5), for the communication within the time slots of a time slots radio channel which comprises predetermined linearization time slots (120), for the transmission of some training signals necessary for the linearization, interspersed between other traffic or control time slots, the base station (6) having means for the transmission of a synchronization signal, for defining the time slot duration, and each of the remotely located radiotelephony units (5) having a power amplifier (12) provided with linearization means. Specific to the system, is the channel which comprises predetermined linearization time slots (120) for the transmission of the training signals necessary for the linearization, interspersed between said other time slots, each remotely located radiotelephony unit (5) comprising means for generating a training signal, during the linearization time slot (120) and for the linearization of the power amplifier (12), during said linearization time slot (120), before the transmisstion of the signals during one of the said other time slots and independently of the transmission thereof.
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Patent Agency Ranking
公开(公告)号：GB2292286B
公开(公告)日：1998-09-09
申请号：GB9415966
申请日：1994-08-06
Applicant: MOTOROLA INC
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公开(公告)号：ES2098185B1
公开(公告)日：1997-12-16
申请号：ES9450017
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：DE68926123T2
公开(公告)日：1996-10-10
申请号：DE68926123
申请日：1989-12-21
Applicant: MOTOROLA INC
Inventor： KOTZIN MICHAEL DALE , CRISLER KENNETH J , MOHL LAWRENCE M , SALTZBERG THEODORE , HONG DAEHYOUNG , VAN DEN HEUVEL ANTHONY PATRICK
Abstract: A communication system that provides TDM and FDM communications between communication units. At least two control slots are provided in each TDM frame window to provide communication control information such as channel assignment information.
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公开(公告)号：GB2272133B
公开(公告)日：1996-06-12
申请号：GB9222922
申请日：1992-11-02
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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公开(公告)号：HUT68149A
公开(公告)日：1995-05-29
申请号：HU9401972
申请日：1993-10-07
Applicant: MOTOROLA INC
Abstract: PCT No. PCT/EP93/02743 Sec. 371 Date Nov. 17, 1994 Sec. 102(e) Date Nov. 17, 1994 PCT Filed Oct. 7, 1993 PCT Pub. No. WO94/10765 PCT Pub. Date May 11, 1994This invention relates to a time division multiple access (TDMA) trunked radio system and it relates to a frame structure for communication between fixed, mobile and portable radios in such a system. The radio system comprises: a base station and a plurality of remote radio units for communicating over time slots of a time divided radio channel, the base station having means for transmitting a synchronization signal for defining the timing of the time slots, and each of the remote units having a power amplifier with linearization means, characterized in that the channel comprises predetermined linearization time slots (120, FIG. 2) for transmission of training signals, interspersed between other time slots and each remote radio unit comprises means for generating a training signal during a linearization time slot and linearizing its power amplifier during that time slot in advance of and independent of transmission of signals during one of said other time slots.
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