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7412263 |
Advisory alert of low signal strength for cell phone user
The invention provides an advisory alert indicating conditions are such that an ongoing telephone call involving a cellular telephone may be dropped due to insufficient signal strength. A decrease...
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7099370 |
Wireless communication system and method of controlling same
A wireless communication system has a plurality of wireless communication devices capable of communicating with one another directly without the intervention of another device, and a wireless...
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7088966 |
Wireless connection controller
A method and system for establishing connection between two wireless devices. The method and system includes establishing connection authentication between the wireless devices, and measuring and...
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6804289 |
Wireless communication system and method of controlling same
A wireless communication system has a plurality of wireless communication devices capable of communicating with one another directly without the intervention of another device, and a wireless...
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6564071 |
Transmission of data over a radio frequency channel
An improved system for the transmission of data over a cellular telephone channel is provided. The system is especially adapted to reduce the cost associated with cellular telephone calls by...
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6263210 |
Wireless communication system and method of controlling same
A system, device, and method of controlling a wireless communication system including a plurality of wireless communication devices and a wireless control unit for controlling the wireless...
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6216009 |
Method and apparatus for resolving multiple call accesses in a wireless communication system
A base transceiver station has a signal strength receiver and is capable of transmitting a directed retry signal. A processor connects to the signal strength receiver and compares a received signal...
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6078816 |
Method and apparatus for establishing clear wireless communication
A cellular communications device having circuitry for establishing clear wireless communications which includes a receiver-transmitter for receiving and transmitting wireless signals, a signal...
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5826198 |
Transmission of data over a radio frequency channel
An improved system for the transmission of data over a cellular telephone channel is provided. The system is especially adapted to reduce the cost associated with cellular telephone calls by...
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5740537 |
Method and circuitry for selectively permitting communication in a multi-user communication system
Circuitry, and an associated method for a multi-user communication system, such as a cellular communication system. Additional communication is selectively permitted in the communication system...
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5542093 |
Method for redistributing dual mode mobile units to extended channel groups to reduce congestion in primary channel groups
A method of setting up and handing off calls in a mobile cellular radio system in which consideration is given to the load capacity of several types of channels. The communication system determines...
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5528663 |
DTMF detection for voice processing equipment
By testing a received signal for power, frequency content, and stability, one can measurably improve DTMF signal detection and identification performance in voice store and forward systems. The...
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5481537 |
Transmission signalling technique for a reservation request
When data is ready for transmission, a quality measurement of a communication resource is determined (303). A preferred signalling technique is determined from a plurality of signalling techniques...
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5475871 |
Communication system with control signal based tuning
A communications system (10) comprising a base station (12) for controlling a control channel signal and a plurality of traffic channels and a communications device (17) responsive to the control...
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5333178 |
Mobile telephone network structure
in a telecommunication network structure, all functions related to traffic control, including functions for controlling, originating and terminating connections, take place in a mobile service...
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