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| OF A PREFERRED EMBODIMENT The present invention encompasses a portable data carrier (e.g. a smart ... |
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Alarm communications system with supervision signal RSSI analysis
| Details |
Inventors: Addy, Kenneth L.;
Assignee: Pittway Corporation (Chicago, IL)
Primary Examiner: Crosland; Donnie L.
Assistant Examiner:
Attorney, Agent or Firm: Barkume, P.C.; Anthony R.
A self testing wireless data communications system suitable for use with an alarm system, the receiving element of the communications system is capable of measuring the signal strength (RSSI) of the received message signal and comparing it, if it is a supervision message, to a predetermined threshold value. When the supervision RSSI signal is above the threshold, the received message is passed to the control as being validly received; when the supervision RSSI signal is not above the threshold, then the message is ignored. |
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DETAILED DESCRIPTION In accordance with these and other objects, the present invention is a method for automatically testing a communications system, the communications system comprising a plurality of remote transmitting devices and a receiving station having a receiver associated therewith, each of the remote transmitting devices capable of transmitting a supervision signal and a non-supervision signal.
The method comprises the steps of receiving at the receiving station a signal from a transmitting device, generating an RSSI (received signal strength indication) signal indicative of the signal strength of the received signal, and determining if the received signal is a supervision signal or a non-supervision signal.
When the received signal is determined to be a supervision signal, then it is determined if the generated RSSI signal is above a predetermined threshold level, and the received signal is subsequently processed as being a validly received supervision signal when the RSSI signal is above the predetermined threshold level.
The received signal is not processed as being a validly received supervision signal when the generated RSSI signal is not above the predetermined threshold level.
When the received signal is determined to be a non-supervision signal, then the received signal is subsequently processed as being part of a validly received non-supervision signal without determining if the received signal is above the predetermined threshold level.
The present invention is implemented by system comprising a plurality of remote devices, each of the remote devices comprising means for transmitting supervision signals and non-supervision signals, and a receiving station.
The receiving station comprises means for receiving the supervision signals and the non-supervision signals, means for generating an RSSI signal indicative of the signal strength of the received signal, signal type determination means for determining if the received signal is a supervision signal type or a non-supervision signal type, comparison means for comparing the RSSI signal to a predetermined threshold, and means for disallowing further processing of the received signal when the signal type determination means indicates that the received signal is a supervision type signal and when the comparison means indicates that the RSSI signal is below the predetermined threshold
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Communications 
