Cordless telephone system
First Claim
1. A base station of a digital cordless telephone system having a plurality of terminal stations and at least one other base station, comprising:
- radio frequency processing means for processing an RF signal for transmitting and/or receiving digital data;
communication control means for controlling said radio frequency processing means to communicate with one or more of said plurality of terminal stations using a control channel, wherein said communication control means generates a control signal having periodic pulses for reception by said plurality of terminal stations, and wherein some of said periodic pulses are randomly extinguished; and
random number generating means for generating random numbers used to select which of said periodic pulses are to be randomly extinguished, whereby periodic pulses from said base station will not simultaneously occur with periodic pulses from said at least one other base station when said selected periodic pulses are randomly extinguished.
1 Assignment
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Accused Products
Abstract
A digital cordless telephone system can prevent control signals transmitted from a plurality of base stations from interfering with each other In a digital cordless telephone system wherein a communication signal is transmitted among it and terminal stations by transmitting digital data through a predetermined channel and a communication among it and the terminal stations is controlled by a control channel different from the predetermined channel, data in a slot arrangement is used as a control signal, the control signal of the slot arrangement is intermittently transmitted at a constant interval, and a transmission at every constant interval is randomly extinguished.
11 Citations
12 Claims
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1. A base station of a digital cordless telephone system having a plurality of terminal stations and at least one other base station, comprising:
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radio frequency processing means for processing an RF signal for transmitting and/or receiving digital data; communication control means for controlling said radio frequency processing means to communicate with one or more of said plurality of terminal stations using a control channel, wherein said communication control means generates a control signal having periodic pulses for reception by said plurality of terminal stations, and wherein some of said periodic pulses are randomly extinguished; and random number generating means for generating random numbers used to select which of said periodic pulses are to be randomly extinguished, whereby periodic pulses from said base station will not simultaneously occur with periodic pulses from said at least one other base station when said selected periodic pulses are randomly extinguished. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A digital cordless telephone system comprising:
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at least two base stations; and
one or more terminal stations for receiving a digital signal, wherein communication between said at least two base stations and said one or more terminal stations uses respective control signals each having periodic pulses; andeach of said at least two base stations having a random number generator, whereby some of said periodic pulses from each of said at least two base stations are randomly extinguished based on random numbers generated respectively from said random number generator, whereby periodic pulses from said at least two base stations will not occur simultaneously when said periodic pulses are respectively randomly extinguished. - View Dependent Claims (9, 10, 11)
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12. A method for sending a control signal to any of a plurality of terminals from a base station of a digital cordless telephone system that includes at least one other base station, comprising the steps of:
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generating a control signal having periodic pulses; generating random numbers; randomly extinguishing some of said periodic pulses based on the generated random numbers, whereby periodic pulses from said base station will not simultaneously occur with periodic pulses from said at least one other base station when said periodic pulses are randomly extinguished; and transmitting to any of said plurality of terminals an RF signal modulated by at least said control signal generated in said control signal generating step.
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Specification