Nova Patents
CA2231452C

Cordless cellular system base station

Abstract

A mobile station (12) communicates with both a cellular network, by which it is assigned a mobile identification number, and to a cordless cellular base station (10) utilizing the same cellular frequency range and communications protocol. The cordless cellular base station is preferably connected to a public switched telephone network (15).

CA2231452C, drawing sheet 1
Sheet 1 of 38

Term

Term ended

Expired 6 September 2016, 10 years ago.

  1. Priority
  2. Filed
  3. Granted
  4. Expired
  5. Today

1 claim: 1 independent, 0 dependent

  1. 1
    CA 02231452 1998-03-06 WO 97/11567 PCT/US96/14443 - 116 WHAT IS CLAIMED IS:1. A base station, comprising! standard telephone interface hardware in communication with a PSTN line wherein said hardware receives a first communication signal from said PSTN line 5 and converts said first communication signal to a first voice signal;a receiver establishing a plurality of receive channels, wherein a first receive channel is assigned to receive a first digital communication signal from a first 10 wireless remote station and a second receive channel is assigned to receive a second digital communication signal from a second wireless remote station;a first converter in communication with said receiver wherein said first converter decodes said first 15 digital signal to form a second voice signal and decodes said second digital signal to form a third voice signal;a first summer which combines said first and second voice signals to form a first composite voice signal;20 a second summer which combines said first and third voice signals to form a second composite voice signal ;a third summer which combines said second and third voice signals to form a third composite voice 25 signal;a second converter in communication with said first and second summers, wherein said second converter encodes said first composite voice signal to form a first composite encoded signal and encodes said second composite 30 voice signal to form a second composite encoded signal;a transmitter establishing a plurality of transmit channels, said transmitter adapted to transmit the first encoded composite signal to said second wireless remote station in a first transmit channel and to transmit 35 said second encoded composite signal to said first wireless remote station in a second transmit channel;and CA 02231452 1998-03-06 WO 97/11567 PCT/US96/14443 117 wherein said standard telephone interface hardware is in communication with said third summer and said PSTN line to convert said third composite voice signal to a second to said PSTN line. communication signal for transmission The receiver is a time The receiver is a time The base station of Claim 1, wherein said division multiplex receiver. base station of Claim 2, wherein said division multiple access receiver. base station of Claim 1, wherein said a time division multiplex transmitter. The base station of Claim 4, wherein said transmitter is transmitter is transmitter . 6. The base station of Claim 1, wherein said transmitter and receiver are implemented 7. The base station of Claim as a transceiver. wherein said 1, a standard standard telephone interface hardware is four-wire-to-two wire hybrid device. A base station for receiving communication first and second wireless remote stations and signals from a PSTN line, standard telephone interface hardware in communication with the PSTN line, wherein said hardware comprising : receives a communication signal from said PSTN line and converts said communication information to a first voice signal;a receiver establishing a plurality of receive channels, wherein a first receive channel is assigned to receive a first digital communication signal from a first wireless remote station and a second receive channel is assigned to receive a second digital communication signal from a second wireless remote station;a first converter in communication with said receiver wherein said first converter decodes said first digital signal to form a second voice signal and decodes said second digital communication signal to form a third CA 02231452 1998-03-06 WO 97/11567 PCT/US96/14443 - 118 voice signal;a first voice level comparator having first and second inputs and an output, said first input connected to said first voice signal and said second input connected to said second voice signal to determine which of said signals is the loudest;a switch having first, second and third inputs and an output, said first input connected to the first voice signal, said second input connected to said second voice signal and said third input connected to said output 10 of said first voice level comparator, said switch adapted to connect either of the first and second inputs to said output depending upon the output of said first voice level comparator to select the louder of said first and second voice signals;15 a second voice level comparator having first and second inputs and an output, said first input connected to said first voice signal and said second input connected to said third voice signal to determine which of said signals is the loudest;20 a switch having first, second and third inputs and an output, said first input connected to the first voice signal, said second input connected to said third voice signal and said third input connected to said output of said second voice level comparator, said switch 25 connected to said output of said switch dependent upon the output of said second voice level comparator to select the louder of the first and third voice signals;a second converter in communication with the first and said second switches, wherein said second 30 converter encodes said output of said first switch to form a first encoded signal and codes said output of said second switch to form a second encoded signal;a transmitter establishing a plurality of transmit channels, said transmitter adapted to transmit 35 the first digital signal to said second wireless remote station in a first transmit channel and to transmit the CA 02231452 1998-03-06 WO 97/11567 PCT/US96/14443 - 119 o second digital signal to said first wireless remote station in a second transmit channel;and a summer having first and second inputs and an output, said first input connected to said second voice signal and said second input connected to said third voice 5 signal to form a composite voice signal at said output, wherein said standard telephone interface hardware converts said composite voice signal to a second communication signal for transmission to said PSTN line. 9. The base station of Claim 8, wherein said 10 receiver is a time division multiplex receiver. 10. The base station of Claim 9, wherein said receiver is a time division multiple access receiver. 11. The base station of Claim 8, wherein said transmitter is a time division multiplex transmitter. 15 12. The base station of Claim 11, wherein said transmitter is a time division multiple access transmitter. 13. The base station of Claim 8, wherein said transmitter and receiver are implemented as a transceiver. 20 14. The base station of Claim 8, wherein said standard telephone interface hardware is a standard four-wire-to-two wire hybrid device. 15. A base station for receiving communication signals from first and second wireless remote stations and 25 a PSTN line, comprising: a receiver establishing a plurality of receive channels, wherein a first receive channel is assigned to receive a first digital communication signal said first wireless remote 30 station and a second receive channel is assigned to receive a second digital communication signal from said second wireless remote station;a voice detector in communication with said receiver and adapted to detect the presence of 35 said first digital voice signal or said second digital voice signal and to report which of said CA 02231452 1998-03-06 WO 97/11567 PCT/US96/14443 ο - 120 - first and second digital voice signals are the 5 loudest to an output;a switch having first, second and third inputs and an output, said first input connected to the first digital voice signal, said second input connected to said second digital voice 10 signal and said third input connected to said output of said voice detector, said switch adapted to connect either of the first and second inputs to said output of said switch depending upon which voice signal is detected as 15 being the loudest by the detector;a first converter in communication with said output of said switch, said first converter adapted to decode a voice signal output from said switch to form a first voice signal;20 standard telephone communications hardware in communication with the PSTN line and said first converter, wherein said hardware converts said first voice signal to a first communication signal for transmission to said PSTN line and 25 converts said second communication signal received from the PSTN line to a second voice signal;a second converter in communication with said standard communications hardware, wherein 30 said second converter encodes said second voice signal to form a third digital voice signal;and a transmitter establishing a plurality of transmit channels, said transmitter adapted to transmit said third digital voice signal to said 35 first wireless remote station in a first transmit channel and to transmit said third digital signal to said second wireless remote station in a second transmit channel. 16. The base station of Claim 15, wherein said receiver is a time division multiplex receiver. CA 02231452 2001-03-02 - 121 - 17. The base station of Claim 16, wherein said receiver is a time division multiple access receiver. 18 . The base station of Claim 15, wherein said transmitt er is a time division multiplex transmitter. 19. The base station of Claim 18, wherein said transmitter is a time division multiple access transmitter. 20. The base station of Claim 15, wherein said transmitter and receiver are implemented as a transceiver. 21. The base station of Claim 15, wherein said standard telephone interface hardware is a standard fourwire-to-two wire hybrid device.