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Wireless conferencing system using narrow-band channels

  • US 10,136,426 B2
  • Filed: 03/16/2016
  • Issued: 11/20/2018
  • Est. Priority Date: 12/05/2014
  • Status: Active Grant
First Claim
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1. A system of duplex radios for communicating on a narrowband radio service, the system comprising:

  • a first radio, the first radio comprising;

    a transmitter;

    a receiver; and

    electronics configured to;

    cause the transmitter of the first radio to transmit a first communication using a time division multiple access protocol, wherein;

    transmitting the first communication uses a bandwidth equal to or less than 30 kHz and equal to or greater than 1 kHz;

    the first communication comprises voice data; and

    the first radio is assigned a first time slot of the time division multiple access protocol to transmit voice data;

    receive a second communication from the receiver of the first radio, wherein;

    the first radio receives the second communication after transmitting the first communication; and

    the first radio switches between transmitting the first communication to receiving the second communication in less than 15 ms and greater than 1 μ

    s; and

    generate a first audio stream based on the second communication and the time division multiple access protocol; and

    a second radio, the second radio comprising;

    a transmitter;

    a receiver; and

    electronics configured to;

    receive the first communication from the receiver of the second radio, wherein the receiver of the second radio directly receives the first communication transmitted from the transmitter of the first radio;

    cause the transmitter of the second radio to transmit the second communication using the time division multiple access protocol, wherein;

    transmitting the second communication uses a bandwidth equal to or less than 30 kHz and equal to or greater than 1 kHz;

    the second communication comprises voice data; and

    the second radio is assigned a second time slot of the time division multiple access protocol to transmit voice data; and

    generate a second audio stream based on the first communication and the time division multiple access protocol.

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