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Push-to-talk and push-to-conference in a CDMA wireless communications system

  • US 6,982,961 B2
  • Filed: 07/19/2001
  • Issued: 01/03/2006
  • Est. Priority Date: 07/19/2001
  • Status: Active Grant
First Claim
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1. A method of handling a group call in a CDMA wireless communications system, comprising:

  • classifying members of a group call into a first class or a second class, said first class comprising members authorized to both talk and listen, said second class comprising members authorized to listen but not to talk;

    initially assigning a private downlink channel to each member of said group call belonging to said first class;

    assigning a public downlink channel to at least one member of said group call belonging to said second class;

    changing the classification of a first member of said group call belonging to said first class to be said second class in response to said member not talking for a predetermined time period during said group call; and

    changing the downlink channel assignment of said first member from said respective private channel to said public downlink channel assigned to said at least one member of said group call belonging to said second class in response to said change in classification.

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