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6804529 |
Trunked radio repeater communication system including home channel aliasing and call grouping
A system for channel assignment in a trunked transmission communication system including a plurality of subscribers. A plurality of subscribers is provided home channel assignment to reduce...
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6529486 |
Trunked radio repeater communication system
A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for...
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6374115 |
Method and apparatus for trunked radio repeater communications with backwards compatibility
A trunked radio repeater communication system capable of use in a networked system includes a plurality of distributive switches and a unique signaling protocol and a switching protocol for...
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6150987 |
Antenna assembly
An antenna assembly for a communications network is disclosed, the assembly comprising an antenna which is operable in different modes of operation; wherein, in a first mode, the antenna is...
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6005884 |
Distributed architecture for a wireless data communications system
A data communications system characterized by the combination of a base station connected to a plurality of repeaters for communicating with remote terminals in response to outgoing data from a...
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5901341 |
Land mobile radio system having a cell in which mobile radios transmit and receive both data and audio
A land mobile radio communication system has a plurality of cell cites, each of which includes a plurality of repeaters. The mobil radios in the cell transmit and receive both data and audio. The...
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5815799 |
Priority system for a wide area transmission trunked communication system
A method and apparatus for providing priority access for users in a transmission trunked communication system, including a plurality of distributive radio network terminal (RNT) switches and a...
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5787345 |
Automatic voice prompts in a land mobile radio system
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
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5678176 |
Direct inward dial telephone number recognition in a land mobile radio system
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
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5646632 |
Method and apparatus for a portable communication device to identify its own location
A method and apparatus for a portable communication device, such as a mobile radio terminal in a CDMA network, to identify its geographic location. A communication network comprises multiple base...
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5627876 |
Call priority override in a land mobile radio system
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
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5625870 |
Fraud control for radio fleets in a land mobile radio system
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
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5613196 |
Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
A land mobile transmission trunked communication system is provided with a unique switching protocol arrangement among repeaters that are networked to one or more external communication networks....
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5557606 |
Routing of voice communication at a cell site in a land mobile radio system
A land mobile radio communication system has a plurality of cell sites, each of which typically has a plurality of repeaters. The over-the-air radio communications between the cell site repeaters...
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5465386 |
Signaling protocol for a distributive wide area transmission trunked communication system
A land mobile transmission trunked communication system is provided with an enhanced control signal protocol. The land mobile transmission trunked communication system includes a plurality of...
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5440759 |
Modular networking switch system for a distributive wide area transmission trunked communication system
A modular networking switch system for a land mobile transmission trunked communication system provides transmission trunked communications with a plurality of transceivers and networks the...
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5377256 |
Apparatus and method for a cellular freeway emergency telephone
A self-contained cellular emergency roadside call box is disclosed without the use of external telephone lines. The call box is solar powered with battery storage and comprises a controller coupled...
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RE34496 |
Apparatus and method for a cellular freeway emergency telephone service
A self-contained cellular emergency roadside call box is disclosed without the use of external telephone lines. The call box is solar powered with battery storage and comprises a controller coupled...
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5159701 |
Method and apparatus for a distributive wide area network for a land mobile transmission trunked communication system
A method and apparatus for distributively interconnecting a plurality of land mobile trunked transmission communication systems into a wide area network includes a plurality of distributive radio...
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D324680 |
Cordless telephone with antenna
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5040237 |
Method and apparatus for an alternate home channel for a land mobile transmission trunked communication system
An alternate home channel for a land mobile transmission trunked communication system designates one of a plurality of repeaters for a given site or coverage zone as an alternate home repeater. The...
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4730310 |
Terrestrial communications system
A terrestrial radio system which utilizes spot beams, time division multiple access and frequency reuse to provide communications services from a base station to remote customers within a system...
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4670906 |
Data communications system transmitter selection method and apparatus
A data communications system is described which comprises a general communications controller (GCC), a plurality of channel communications modules (CCM) and associated co-located transmitters and...
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4627045 |
Alternating communication channel switchover system
A redundant common communication system for a distributed process control or data processing system has multiple stations which are coupled to at least two redundant communication channels (such as...
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4611334 |
Message capturing radio data system
A radio data communications system is disclosed in which messages, normally lost to interference caused by independent remote units contending for the radio channel, may be salvaged. If a remote...
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4596042 |
Radio transmission method for a mobile radio system
In a radio transmission method for a mobile radio system, a link between a mobile station and a central station is established via one of several base stations. The selection of the base station is...
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4578815 |
Wide area coverage radio communication system and method
A wide area coverage radio communication system of the type adapted to relay a message substantially simultaneously from a plurality of fixed location sites to a plurality of portable or mobile...
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4549311 |
Method and apparatus for measuring the strength of a radio signal frequency
An improved method and apparatus for measuring the strength of a radio frequency (RF) signal subject to Rayleigh fading is described. The strength of the RF signal is sampled two or more times...
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4485486 |
Method and apparatus for assigning duplex radio channels and scanning duplex radio channels assigned to mobile and portable radio telephones in a cellular radiotelephone communications system
A unique method and apparatus for efficiently assigning duplex radio channels and scanning duplex radio channels assigned to mobile and portable radiotelephones in a cellular communications system...
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4481670 |
Method and apparatus for dynamically selecting transmitters for communications between a primary station and remote stations of a data communications system
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...
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4399555 |
Cellular high capacity mobile radiotelephone system with fleet-calling arrangement for dispatch service
A high capacity, cellular, channel reuse, mobile, radiotelephone system supplies both nondispatch radiotelephone service and dispatch service with a fleet-calling capability. For the latter...
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4347626 |
Radio telephone communication network
In a relay station for use in a radio telephone network, which relay station includes a time storage unit composed of a time delay member connected to be switched, in response to recognition of a...
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4317219 |
Mobile radio system
A radio system for communications transmission between transmitting/receiving stations moving along prescribed routes and stationary transmitting/receiving stations arranged along these routes at...
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4174501 |
Command signal generator for an automatic channel selection device in a radio which is mobile relative to transmitter stations
This device which can be used in a phase or frequency modulation receiver, is connected to the output of the frequency discriminator of the receiver and comprises means for forming a logic signal...
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