Matches 1 - 29 out of 29
Match Document Document Title
7099680 Data interface protocol for two-way radio communication systems  
A method and system is disclosed that allows for the designation of over 1,000,000 individual users in a communication system, such as an EDACS system, using the existing five-digit portion of comm...
6950653 Scanning tone remote adapter for land-mobile radio dispatch for use with dispersed dispatch stations  
A land mobile radio dispatch system is provided, which comprises a radio, one or more remote dispatch devices, and a scanning tone remote adapter connected to the radio and the remote dispatch devi...
6882663 Method for synchronizing a control channel to a working channel  
A subscriber unit ( 104 ) listens to a first channel ( 202 ) comprising a plurality of micro-slots and a plurality of data units. The subscriber unit decodes at least a portion of a data unit on th...
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 collisi...
6768897 Method of adjusting frequency of cellular radio repeater  
The invention relates to a method of adjusting the radio frequency of a repeater ( 302 ) in a cellular radio network. The repeater ( 302 ) amplifies radio signals ( 170 ) of a bi-directional radio ...
6687503 Method and system for wireless connection to a wide area network  
A method and system for providing wireless backhaul channels for use in a cellular radio network is disclosed wherein any of the subscriber terminals can be used as a backhaul terminal thus dispens...
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 interco...
6519472 Trunked radio monitoring system  
A method and apparatus for passively monitoring communications in a trunked communication system. Digital messages transmitted over a control channel at a particular frequency are monitored with a ...
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 interco...
6360103 Cellular telephone system which increases efficiency of reserved channel usage  
A wireless communication system, such as a cellular communication system prioritizes calls to have a low, regular or high priority. The communication channels provided by a base station are divided...
6081720 Method and apparatus for allocating shared communication channels  
A method and apparatus for allocating shared communication channels between a voice transceiver segment and a data/CDPD transceiver segment of a cellular radio communication system incorporating a ...
6044265 Methods and apparatus for cellular set programming  
A method for programming a cellular set over a control channel may be used to update data stored within a cellular set by having the cellular set search the control channel for data updates that ar...
5956648 Trunked radio monitoring system  
A method and apparatus for passively monitoring communications in a trunked communication system. Digital messages transmitted over a control channel at a particular frequency are monitored with a ...
5953671 System and method for priority group access  
An improved trunked radio repeater system and method providing an alternative communication mechanism for contacting a dispatcher within the system when the user's assigned group is busy. Using a p...
5898382 Shared channel communication system  
A communication system includes a scanning receiver coupled to a first antenna, a plurality of repeaters coupled to a second antenna, wherein each repeater operable on any channel in a band, and a ...
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 bps...
5860060 Method for left/right channel self-alignment  
A data processing device uses a portion of random access memory 121 as an output buffer 124 for holding a portion of a stream of PCM data which is to be output to a digital to analog converter 530....
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 uniq...
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. T...
5574977 System and method for providing priority access and channel assignment in a cellular telecommunication system  
A system and method of providing users of a mobile cellular telecommunication network, who subscribe to priority service, with priority access to voice or traffic channels during periods of congest...
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...
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 a...
5548802 Method and apparatus for a remote network switch 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 n...
5509016 Procedure and arrangement for a radio communications system  
For a radio communications system with time-divided frequencies, the synchronization between a base station and a mobile station is shifted as the mobile moves. The base station transmits symbol se...
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 trans...
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 channe...
5363428 Dynamic channel assignment cordless telecommunication network  
In a microcellular cordless telephone network, radio speech channels are divided into several channel groups such that no intermodulation products occur among the channels of each group. In each mi...
5313655 Method for reducing control channel activity for limited audience communications  
A communication resource allocator can reduce control channel traffic for limited audience communications in the following manner. After receiving and granting a request for allocation of a communi...
5274837 Trunked radio repeater system with multigroup calling feature  
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...

Matches 1 - 29 out of 29