Telecommunications – Radiotelephone system – Zoned or cellular telephone system
Reexamination Certificate
2004-09-01
2008-08-12
Appiah, Charles N. (Department: 2617)
Telecommunications
Radiotelephone system
Zoned or cellular telephone system
C455S115100, C455S456100, C455S574000, C455S343500, C455S423000, C455S226100, C455S457000, C455S067700, C455S343100, C455S067110, C455S343200
Reexamination Certificate
active
07412235
ABSTRACT:
A system and method for fast detection of specific on-air data rates are disclosed which, in one example embodiment, enable endpoint devices in automatic meter reading (AMR) systems to quickly determine the existence of over-the-air information that is specifically targeted to a unique class of AMR devices. An endpoint device utilizing the digital squelch circuit arrangement and algorithm of the invention can quickly and precisely determine if the AMR system is communicating with its class of AMR device by looking for a specific non-standard data rate present on the air. This method therefore allows for a significant improvement in battery life in two-way RF communication units by avoiding unnecessary data processing and data transmissions. The digital squelch method also enables even faster determination of inappropriate data rates and of no signal present situations, further improving battery life.
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Fitzgerald Aaron
Larson Gary
Stroda Kris
Appiah Charles N.
Itron, Inc.
Patterson Thuente Skaar & Christensen P.A.
Stephen Emem
LandOfFree
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