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Connectionless broadcast signalling

  • US 20020094797A1
  • Filed: 01/15/2002
  • Published: 07/18/2002
  • Est. Priority Date: 01/18/2001
  • Status: Abandoned Application
First Claim
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1. A communications system comprising at least one beacon device capable of wireless message transmission and at least one portable device capable of receiving such a message transmission, wherein the beacon is arranged to broadcast messages using a first protocol which provides a series of inquiry messages, different inquiry messages in the series being provided on different carrier frequencies, and wherein the beacon is arranged to broadcast additional data using a spread spectrum transmission technique.

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