Method of coexistence of multiple wireless fire systems
First Claim
1. A method comprising:
- a processor of a wireless gateway of a security system detecting other interfering wireless gateways of the security system, their frequency hopping pattern, their phase offset in the frequency hopping pattern relative to a time reference and a dwell time between hops in the frequency hopping pattern relative to the time reference;
a processor of the wireless gateway selecting a channel set and a phase of operation for communicating with a plurality of sensors relative to the time reference using frequency hopping based upon the detected frequency hopping pattern, the phase and dwell time of the other wireless gateways;
a processor of the wireless gateway communicating with the plurality of sensors and periodically comparing its phase of operation with the phase of the other interfering wireless gateways; and
a processor of the wireless gateway adjusting its phase to avoid interference based upon the comparison with the phase of the other interfering wireless gateways.
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Accused Products
Abstract
A method and apparatus are provided, the method incorporating the steps of detecting other interfering wireless gateways of the security system, their frequency hopping pattern, their phase relative to a time reference and a dwell time relative to the time reference, selecting a channel set and a phase of operation for communicating with a plurality of sensors relative to the time reference using frequency hopping based upon the detected frequency hopping pattern, the phase and dwell time of the other wireless gateways, communicating with the plurality of sensors and periodically comparing its phase of operation with the phase of the other interfering wireless gateways and adjusting its phase based upon the comparison with the phase of the other interfering wireless gateways.
11 Citations
20 Claims
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1. A method comprising:
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a processor of a wireless gateway of a security system detecting other interfering wireless gateways of the security system, their frequency hopping pattern, their phase offset in the frequency hopping pattern relative to a time reference and a dwell time between hops in the frequency hopping pattern relative to the time reference; a processor of the wireless gateway selecting a channel set and a phase of operation for communicating with a plurality of sensors relative to the time reference using frequency hopping based upon the detected frequency hopping pattern, the phase and dwell time of the other wireless gateways; a processor of the wireless gateway communicating with the plurality of sensors and periodically comparing its phase of operation with the phase of the other interfering wireless gateways; and a processor of the wireless gateway adjusting its phase to avoid interference based upon the comparison with the phase of the other interfering wireless gateways. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An apparatus comprising:
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a security system; a plurality of sensors that detect threats within a secured area of the security system; a plurality of gateways, each providing a wireless connection between the security system and at least one of the plurality of sensors; a processor of a wireless gateway of the plurality of gateways that detects other interfering wireless gateways of the security system, their frequency hopping pattern, their phase offset in the frequency hopping pattern relative to a time reference and a dwell time between hops of the frequency hopping pattern relative to the time reference; a processor of the wireless gateway that selects a channel set and a phase of operation for communicating with at least some of the plurality of sensors relative to the time reference using frequency hopping based upon the detected frequency hopping pattern, the phase and dwell time of the other wireless gateways; a processor of the wireless gateway communicating with the plurality of sensors and periodically comparing its phase of operation with the phase of the other interfering wireless gateways; and a processor of the wireless gateway adjusting its phase to avoid interference based upon the comparison with the phase of the other interfering wireless gateways. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. An apparatus comprising:
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a security system that protects a secured area; a plurality of sensors that detect threats within the secured area of the security system; a plurality of gateways, each having a radio frequency coverage area; a processor of each of the plurality of gateways that registers at least one of the plurality of sensors to communicate with the security system through the gateway; a processor of each of the plurality of gateways that detects other interfering wireless gateways of the security system that have overlapping radio frequency coverage areas, their frequency hopping pattern, their phase offset in the frequency hopping pattern relative to a time reference and a dwell time between hops in the frequency hopping pattern relative to the time reference; a processor of each of the plurality of wireless gateways that selects a channel set and a phase of operation for communicating with the at least one of the plurality of sensors of the gateway relative to the time reference using frequency hopping based upon the detected frequency hopping pattern, the phase and dwell time of the other wireless gateways; a processor of each of the plurality of wireless gateways that periodically compares its phase of operation of the frequency hopping pattern with the phase of the other interfering wireless gateways; and a processor of each of the wireless gateways that adjusts a phase of the gateway to avoid interference based upon the comparison with the phase of the other interfering wireless gateways wherein each of the plurality of gateways operates independently of any other of the wireless gateways in avoiding mutual interference among the gateways. - View Dependent Claims (18, 19, 20)
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Specification