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7336932 Narrow band communication vehicle-mounted apparatus  
The present invention provides a narrow band communication vehicle-mounted apparatus capable of performing communication in which there are normally no discrepancies with on-road systems when the...
EP1074165B1 METHOD FOR ALLOCATING CHANNEL NUMBERS TO PHYSICAL TRANSMISSION CHANNELS FOR WIRELESS PROTOCOL-ORIENTED INFORMATION EXCHANGE  
Abstract not available for EP1074165 Abstract of corresponding document: DE19818510 The invention relates to a method for allocating channel numbers to physical transmission channels for wireless...
6215413 User selectable receiver addresses for wireless communication systems  
Selectable receiver addressing is used to control how messages are output from different receivers. Users selectively enable and disable personal addresses in the receiver. The receiver polls time...
6173170 Radio telephone apparatus capable of detecting a drop of power source voltage  
An automobile radio telephone apparatus capable of detecting a drop of power source voltage to prevent a telephone channel from being occupied wastefully and to thereby enhance efficient use of...
EP0616445B1 Duplex multicarrier digital radio communication system, mobile station and base station for it  
Abstract of EP0616445 The invention relates to a duplex digital radio communication system between at least one mobile station (66) and at least one base station (61), in which each of the said...
5915210 Method and system for providing multicarrier simulcast transmission  
A two-way communication system for communication betweeen a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers include in the network....
5864762 Operating a trunked communication system in transmission and message trunked modes  
A digitally trunked radio repeater system provides substantial improvements in timeliness and reliability. The mobile radio transceivers transmit channel requests on the control channel at 9600...
5805076 Mobile communications system  
In a mobile communications system wherein the transmission form changes in the course of the signal, high quality transmission of change information relating to the transmission form is obtained....
EP0477279B1 PAGING SYSTEM WITH LOCAL CHANNEL LISTS  
Abstract not available for EP0477279 Abstract of corresponding document: WO9100676 A paging receiver is provided a list of alternative paging channels to which it can tune if the paging channel...
5634198 Nationwide communication system  
A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network....
5613225 Radio module included in a primary radio station, and a radio structure containing such modules  
A radio module for a radio base station of a mobile radio system which transmits and receives radio signals from stationary or moving mobile radio stations over given frequencies. A module...
5590403 Method and system for efficiently providing two way communication between a central network and mobile unit  
A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network....
5581804 Nationwide communication system  
A two-way communication system for communication between a system network and a mobile unit. The system network includes a plurality of base transmitters and base receivers included in the network....
5574788 Trunked radio repeater system  
A digitally trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses...
5566358 Mobile radio communication apparatus for registering a location  
A mobile radio communication apparatus includes a common channel detecting unit which judges whether or not a paging channel and an access channel which are assigned to one base station are common...
5475869 Radio base station capable of distinguishing between interference due to collisions of outgoing call signals and an external interference noise  
In a mobile communication system having a radio base station (14A), a plurality of mobile stations connected to the radio base station via at least one control channel, and a radio exchange station...
5424864 Microcellular mobile communication system  
A microcellular mobile radio communication system has a central base station and a plurality of radio base stations interconnected by a shared optical fiber transmission line. In the central and...
5408680 Single channel autonomous digitally trunked RF communications system  
A single channel autonomous trunking ("SCAT") RF repeater transmits and receives on a single duplex RF channel. The repeater operates alternately in a control channel mode and in an assigned...
5369783 Dynamic regrouping in a trunked radio communications systems  
In a trunked radio frequency communications system, a dynamic regrouping scheme includes an effective user interface, automatic support of multi-site systems, the capability to program individual...
EP0616445A1 Duplex multicarrier digital radio communication system, mobile station and base station for it.  
The invention relates to a duplex digital radio communication system between at least one mobile station (66) and at least one base station (61), in which each of the said mobile stations (66) and...
EP0427687B1 Method of choosing a base station, a radio channel and a time slot at a mobile station  
Abstract of EP0427687 In a cellular mobile radio system a method of choosing at a mobile station an appropriate base station and time slot on a time division multiplexed radio channel for the...
5276905 Mobile radio transmission system using preferred home service area  
A private mobile radio transmission system comprising a plurality of geographically spaced base stations (BS) defining a plurality of overlapping service areas (SA). The base stations are coupled...
5187470 Paging system with local channel lists  
A page receiver is provided a list of alternative paging channels to which it can tune if the paging channel presently being received becomes unreliable. This list, and other lists used by paging...
5175758 Cellular telephone system integrated with paging network  
A telephone system with which a connection between two subscribers can be established, at least one of them being a mobile subscriber. The system includes a paging network composed of one or...
5150362 Beacon carrier  
In a cellular mobile radio system a method of choosing at a mobile station an appropriate base station and time slot on a time division multiplexed radio channel for the purpose of call set up or...
5142279 Acknowledge back paging system having the capability of matching variable length data messages to pager addresses  
A paging terminal for transmitting address and variable length message signals to a plurality of remotely located acknowledge back and non-acknowledge back pagers, each having a unique address,...
5125102 Trunked radio repeater system including synchronization of a control channel and working channels  
A digitally trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses...
5117501 Dynamic regrouping in a trunked radio communications system  
In a trunked radio frequency communications system, a dynamic regrouping scheme includes an effective user interface, automatic support of multi-site systems, the capability to program individual...
5109529 Method of assigning frequency channel in mobile communications system  
In order to attain a frequency spectrum efficiency by narrowing channel interval without inducing interference from adjacent channels, a signal level of a mobile unit which requests channel access...
5077828 RF channel expansion in a trunked radio communications system  
In a trunked radio frequency communications system, an arrangement dynamically "expands" or extends the frequency allocation table stored within the "personality" defining non-volatile storage...
5025254 Communication system with improved resource assignment  
A trunked communication system wherein some of the communication resources are preassigned for exclusive use only by a predetermined group, such as a public safety agency. In addition, to assure...
EP0427687A1 Method of choosing a base station, a radio channel and a time slot at a mobile station.  
In a cellular mobile radio system a method of choosing at a mobile station an appropriate base station and time slot on a time division multiplexed radio channel for the purpose of call set up or...
4977608 Radio communication system  
In the radio communication system for performing a communication in the idle channel selected from a plurality of frequency channels, the originating call station transmits the station...
4939746 Trunked radio repeater system  
A digital trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses a...
4935732 Paging receiver with programmable areas of reception  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4905302 Trunked radio repeater system  
A digitally trunked radio repeater system provides substantial improvements in timeliness of channel acquisition and channel drop, and in reliability of critical control signalling. The system uses...
4903320 Apparatus for selecting control channel in mobile communication system  
In a mobile communication system having two operating systems co-existing in one area, a mobile station having a transmitting and receiving circuit and a control unit for subscribing to one of the...
4891637 Acknowledge back pager with apparatus for controlling transmit frequency  
An acknowledge back (ack-back) pager is provided for use in a paging system including a central station which transmits a group of message signals to a group of ack-back pagers which are addressed...
4882579 Code division multiplexed acknowledge back paging system  
An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to an group of ack-back pagers which are addressed as a group....
4881073 Paging system with dynamically programmable reception frequencies  
A paging network is disclosed which utilizes a plurality of distributed switches to transmit pages on a non-real time basis to achieve efficient and low cost transmission. Each of the switches...
4876538 Paging system sublocal switch  
A paging network is disclosed which utilizes a plurality of distributed switches to transmit pages on a non-real time basis to achieve efficient and low cost transmission. Each of the switches...
4875038 Frequency division multiplexed acknowledge back paging system  
An acknowledge back (ack-back) paging system is provided which includes a central station which transmits a group of message signals to a group of ack-back pagers which are addressed as a group....
4857915 Paging receiver with paging receiver identification code digits transmitted in order of increasing significance  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4853688 Paging receiver displaying place of origin of pages  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4851830 Paging receiver with continuously tunable antenna  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4849750 Paging receiver with dynamically programmable channel frequencies and functionality  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4825193 Acknowledge back pager with adaptive variable transmitter output power  
An acknowledge back (ack-back) pager is provided for receiving paging signals from a central paging station. The central paging station transmits a group of message signals to a group of ack-back...
4823123 Knowledge back pager with frequency control apparatus  
An acknowledge back (ack-back) pager is provide for use in a paging system which includes a central station which transmits a group of message signals to a group of ack-back pagers which are...
4726050 Scanning receiver allocation method and apparatus for cellular radiotelephone systems  
A method and apparatus for utilizing voice channel transceivers as temporary scanning receivers in a handoff event for a cellular radiotelephone system is disclosed. Voice channel transceiver...
4644347 Multiple frequency message system  
In the preferred embodiment the multiple frequency receiver comprises a decoder responsive to a transmitted coded message signal having a special code for designating that the message is being sent...
Matches 1 - 50 out of 56 1 2 >