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Multi-access CS-P/CD-E system and protocols on satellite channels applicable to a group of mobile users in close proximity

  • US 6,049,548 A
  • Filed: 04/28/1997
  • Issued: 04/11/2000
  • Est. Priority Date: 11/22/1996
  • Status: Expired due to Term
First Claim
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1. In a multiple access RF communication system in which a plurality of mobile user transceivers communicate with a central hub transceiver over long delay channels, and wherein groups of mobile user transceivers in close proximity with each other share a common multi-access inbound channel frequency F1 and a common outbound channel, frequency Fo, the improvement comprising:

  • each said mobile user transceiver including a continuously listening proximity receiver for the inbound channel and a half-duplex transceiver on the inbound channel means for determining the busy or idle status of said common inbound frequency Fl, and means to indicate the status of said carrier outbound channel and control the ability to transmit on the inbound channel.

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