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Systems and methods for providing push to talk feature for wireless communication systems

  • US 6,751,468 B1
  • Filed: 12/29/1999
  • Issued: 06/15/2004
  • Est. Priority Date: 05/26/1999
  • Status: Expired due to Term
First Claim
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1. A method in a wireless communications system for allowing a first wireless unit and a second wireless unit to share a single communication channel including a transmit frequency and a receive frequency, comprising:

  • assigning the single communication channel to the first wireless unit and the second wireless unit, so that the first wireless unit transmits on the transmit frequency, suspends transmission for a predetermined period of time, and resumes transmission after the predetermined period of time and the second wireless unit transmits on the transmit frequency during the predetermined period of time, and so that the first wireless unit may monitor the receive frequency while transmitting on the transmit frequency and the second wireless unit may monitor the receive frequency; and

    sending a control information message on the receive frequency to the first wireless unit and the second wireless unit for receipt by the first wireless unit or the second wireless unit, the control information message including an indication whether the control information message is directed to the first wireless unit or to the second wireless unit.

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