Communication system

  • US 6,993,049 B2
  • Filed: 06/07/2001
  • Issued: 01/31/2006
  • Est. Priority Date: 06/26/2000
  • Status: Active Grant
First Claim
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1. A communications system comprising a primary station and at least one secondary station, wherein the primary station has means for broadcasting a series of inquiry messages, each in the form of a plurality of predetermined data fields arranged according to a first communications protocol, and means for adding to an inquiry message prior to transmission an additional data field for polling at least one secondary station, and wherein the at least one polled secondary station has means for determining when an additional data field has been added to the plurality of data fields, for determining whether it has been polled from the additional data field and for responding to a poll when it has data for transmission to the primary station.

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