WIRELESS SENSOR NETWORKS
2 Assignments
0 Petitions
Accused Products
Abstract
A wireless sensor network comprises at least one sensor unit which comprises a sensor for sensing a parameter and at least one interrogating node. The interrogating node is arranged to transmit an interrogation message periodically to said sensor unit and to receive a reply message from said sensor unit. The sensor unit is arranged to transmit said reply message after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply message before the end of the deliberate delay.
20 Citations
74 Claims
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1-49. -49. (canceled)
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50. A wireless sensor network comprising:
at least one sensor unit comprising a sensor for sensing a parameter and at least one interrogating node, wherein the interrogating node is arranged to transmit an interrogation message periodically to said sensor unit and to receive a reply message from said sensor unit, wherein the sensor unit is arranged to transmit said reply message after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply message before the deliberate delay ends. - View Dependent Claims (51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64)
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65. A sensor unit for a wireless sensor network, wherein the sensor unit comprises:
a sensor for sensing a parameter, and the sensor unit is arranged to receive an interrogation message periodically from an interrogating node and to transmit a reply to said interrogating node after a predetermined deliberate delay unless the sensor unit determines that an alarm condition has been met, in which case the sensor unit is arranged to transmit said reply before the deliberate delay ends. - View Dependent Claims (66, 67, 68, 69, 70, 71, 72, 73, 74)
Specification