Radio telephone system

Claim 2

A multi-access radio telephone system comprising: a base station connected to a telephone exchanger; and a plurality of mobile stations connected to said base station through radio channels including a control channel and a predetermined number of communication channels, said base station comprising: transmitter/receiver means for receiving a control signal through said control channel and a communication signal through a given one of said communication channels; receiver means for detecting a vacant one of said predetermined number of communication channels and monitoring a calling signal from a given one of said plurality of mobile stations, which is received through said control channel; and control means for performing connection control and communication control, wherein said control means controls such that, in at least a stand-by mode, said receiver means detects a vacant communication channel and said transmitter/receiver means detects a control signal transmitted from said given mobile station through said control channel.

Claim 3

A system according to claim 1, wherein said control means comprises a memory for storing vacant communication channel data.

Claim 4

A system according to claim 1 or 2, wherein when said base station is set in the stand-by mode and receives a calling signal from said telephone exchanger, said control means in said base station transmits a calling signal from said telephone exchanger from said transmitter/receiver means to all of said plurality of mobile stations through said control channel, receives responses from at least one said plurality of mobile stations, when a predetermined period of time has elapsed, switches a channel of said transmitter/receiver means to a given one of said communication channels and a channel of said receiver means to said control channel, assigns one of said predetermined number of communication channels to responded ones of said plurality of mobile stations, establishes communication between said base station and said responded mobile stations, switches the channel of said receiver means to said control channel, causes said receiver means to monitor a calling signal from a nonresponded one of said plurality of mobile stations, and switches said transmitter/receiver means to said control channel when said control means receives the calling signal from said nonresponded mobile station, thereby controlling to establish communication between said nonresponded mobile station and said telephone exchanger.

Claim 6

A radio telephone system comprising connector means connected to a telephone exchanger and a plurality of radio telephone sets connected to said connector means through a radio channel including a control channel and a predetermined number of communication channels, said connector means comprising: transmitter/receiver means for transmitting/receiving a control signal through said control channel and a communication signal through a given one of said communication channels; receiver means for receiving the control signal through said control channel and the communication signal through said given communication channel; and control means, including a memory and a timer, for controlling said transmitter/receiver means and said receiver means to perform connection control and communication control through said radio channel, wherein said control means sets a channel of said transmitter/receiver means to said control channel to allow processing in response to a calling signal from a given one of the plurality of mobile stations and a channel of said receiver to a given one of said communication channels to allow monitoring of communication channels, causes said memory to store a vacant communication channel, waits for a calling signal from said radio telephone set or said telephone exchanger, sets a predetermined period of time in said timer when the calling signal from said telephone exchanger is received, transmits the calling signal from said telephone exchanger to all of said plurality of radio telephone sets, receives responses from at least one said plurality of telephone sets, switches the channel of said transmitter/receiver means to a given one of said communication channels and said receiver means to said control channel when the predetermined period of time set in said timer has elapsed, transmits a ringing signal to establish communication between a first off-hooked one of said plurality of telephone sets and said telephone exchanger, and switches the channel of said transmitter/receiver means to said control channel when said receiver means receives, in response to the ringing signal, a calling signal from a second one of said plurality of radio telephone sets which did not respond within the predetermined period of time, thereby establishing communication between said second radio telephone set and said telephone exchanger.

Claim 7

A radio telephone system comprising connector means connected to a telephone exchanger and a plurality of radio telephone sets connected to said connector means through a radio channel including a control channel and a predetermined number of communication channels, said connector means comprising: transmitter/receiver means for transmitting/receiving a control signal through said control channel and a communication signal through a given one of said communication channels; receiver means for receiving the control signal through said control channel and the communication signal through said given communication channel; and control means, including a memory and a timer, for controlling said transmitter/receiver means and said receiver means to perform connection control and communication control through said radio channel, wherein said control means sets a channel of said transmitter/receiver means to said control channel to allow processing in response to a calling signal from a given one of the plurality of mobile stations and a channel of said receiver to a given one of said communication channels to allow monitoring of communication channels, causes said memory to store a vacant communication channel, waits for a calling signal from said radio telephone set or said telephone exchanger, sets a predetermined period of time in said timer when the calling signal from said telephone exchanger is received, transmits the calling signal from said telephone exchanger to all of said plurality of radio telephone sets, receives responses from at least one said plurality of telephone sets, switches the channel of said transmitter/receiver means to a given one of said communication channels and said receiver means to said control channel when the predetermined period of time set in said timer has elapsed, transmits a ringing signal to establish communication between a first off-hooked one of said plurality of telephone sets and said telephone exchanger, and switches the channel of said transmitter/receiver means to said control channel when said receiver means receives, in response to the ringing signal, a calling signal from a second one of said plurality of radio telephone sets which did not respond within the predetermined period of time, thereby establishing communication between said second radio telephone set and said telephone exchanger.