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7167690 |
Radio communication system
A radio communication system comprises a communication channel between a transmitter ( 108 ) having a plurality of antennas ( 110 ) and a receiver ( 114 ) having at least one antenna ( 110 ). In su...
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6912225 |
Packet forwarding device and packet priority setting method
A packet forwarding device with a shaping unit, which is provided with queues for storing high priority packets and queues for storing low priority packets. The shaping unit transmits a packet read...
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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 collisi...
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6721278 |
Dynamic allocation of packet data channels
In a cellular telecommunications system, a method of dynamically allocating packet data radio channels among users competing in a same cell for the channels involves determining a user ranking for ...
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6625117 |
Method and apparatus for switching messages from a primary message channel to a secondary message channel in a message queuing system
A method and apparatus for switching messages from a primary message channel to a secondary message channel in a message queuing system in which messages are placed in a first transmission queue of...
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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 interco...
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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 interco...
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6321093 |
System and method for controlling priority calls in a wireless network
There is disclosed a wireless communications network in which a group of base stations are served by a mobile switching center that maintains a master data record for all missed calls from mobile d...
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6192248 |
Service customization in a wireless communication system
A system for customizing service in a wireless communication system in accordance with a user profile, unique to each user of the system, is described. In this system, a base station receives a cal...
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6097717 |
Method and arrangement in a radio communication system
The present invention concerns a process in a radio communication system which is arranged for packet data transmission according to a message-synchronized ALOHA protocol with reservation. Mobile s...
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6002939 |
Apparatus and method for allocating channels in plural communication units
A cordless telephone with no control channels which makes connection possible even when the handset or the base unit is within the area of another cordless telephone. When effecting connection betw...
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5983114 |
Method and apparatus for monitoring link activity to prevent system deadlock in a dispatch system
Method and apparatus to prevent system deadlock in a dispatch system by monitoring link activity. The dispatch system is comprised of a set of remote units which communicate with each other by broa...
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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...
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5862485 |
Method and apparatus for allocating communication resources to support priority communications in a communication system
A communication system (100) employs a method (300) and apparatus (118) for allocating communication resources (e.g., 127-128) to support priority communications by communication units (112, 114-11...
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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 uniq...
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5784388 |
Methods and apparatus for decoding control signals in dispatch trunked radio system
A system for decoding encoded data from the control channel of a trunked dispatch system, and for detecting the presence of subaudible handshake data on an assigned voice channel of the trunked dis...
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5697078 |
Wideband channel sniffer for monitoring channel use in a wireless communication system
Channel use in a wireless communication system is monitored for each radio frequency channel spanning a broad allocated bandwidth simultaneously. A transmission having signals in channels spanning ...
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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 a...
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5615249 |
Service prioritization in a cellular telephone system
A system for servicing call establishment requests in a cellular telephone system on a priority basis is described. In this system, a base station receives a call establishment request either via a...
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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. T...
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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...
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5570411 |
Call priority in a mobile radiotelephone system
Call priority is realized in a mobile radio telephone system by ascertaining that a call should be given priority, assigning channels preferentially to a priority call, assigning higher quality cha...
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5542108 |
Method for processing communication requests
A communication unit that is registered in a trunked communication system can continue to receive a communication from a first communication unit after initiating a push-to-talk request while the f...
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5517677 |
Adaptive weighting of a scanning sequence
A scanning technique that is preferential as to communication channels actually utilized in the past. A programmable queue is written with a communication channel identity code based on a predefine...
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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 trans...
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5442809 |
Method of assigning a voice/data channel as a temporary control channel in a radio communications system
A method is employed by a central controller of a radio communications system, which method provides for sustaining a predetermined level of communication service. The system includes a plurality o...
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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 plurali...
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5420574 |
Channel allocation mechanism
A channel allocation mechanism especially useful in a trunked communication system that can accommodate both voice and data signals, and that operates in true trunked manner to efficiently utilize ...
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5301356 |
Prioritization between handoff and new call requests in a cellular communications system
A method and system for ensuring that handoff requests take priority over new cell requests to engage voice channels assigned to a particular target cell are provided. A certain number of channels ...
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5251327 |
Method and apparatus for processing audio messages within a communication system
In a communication system that includes a plurality of communication units, a limited number of communication resources, and at least one operator station, the operator station can monitor audio me...
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5239678 |
Method of assigning a control channel as a temporary voice/data channel in a radio communications system
A method (215) of converting a current control channel for use as a communication (voice/data) channel, in order to maintain a predetermined level of service in a radio communications system, emplo...
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5239545 |
Channel access control in a communication system
A CM (105) receives requests for data transfer from a series of UMs (101-103) and from an EM (104). The requests contain the UM (101-103) or EM (104) address and the size of the data packet to be t...
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5226071 |
Call path resource allocation in a wireless telecommunications system
A wireless telecommunications system where call path resources are allocated in an orderly manner by queuing call requests during, for example, radio channel unavailability, and assigning radio cha...
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5220565 |
Selective transmission of encoded voice information representing silence
Discrete packets (306) containing encoded voice information are transmitted within frames (301 and 302) in a repetitive manner until all voice information has been sent. Following transmission of a...
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5203015 |
Automatic channel selection in a mobile radio for telephone interconnect
A mobile radio programmed to analyze idle channel assignments issued by a repeater station and select different channels, if appropriate, which are especially adapted for communicating with other c...
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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 n...
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5060296 |
Communication system with squelch control
A trunked communication system (100) wherein an EOT (308) as transmitted by a communication unit (103) is used by the system to initiate a squelch methodology, but is not used by the resource contr...
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5047762 |
Method and apparatus for increasing co-channel utilization in a multi-station data communications network with overlapping coverage
A digital radio system having improved co-channel utilization is disclosed. A remote terminal receives a station identification from one of the fixed stations having an overlapping radio coverage a...
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5034993 |
Method for allocating communication resources among RF communications systems
A method for allocating RF communication resources among RF communication systems. This allocation may be base strictly upon demand or it may be based upon the loading of an RF communication system...
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