Patent ID: 9204485
Filing Date: 2015-12-01
Classification: G06K,H04W

Abstract:
1. A sensor network node for a wireless communication network, the sensor network node comprising: a wireless communication device; and a sensor configured to measure a predetermined quantity in an environment of the sensor, wherein the communication device is configured such that it is operable in a first communication mode, in which the communication device emits first communication signals at a first transmit power for contactless communication with another sensor network node of the communication network, the another sensor network node having another sensor configured to measure a predetermined quantity in an environment of the another sensor; the communication device comprises a receiving device that receives first communication signals reflected on a transponder, said receiving device being arranged to evaluate the reflected first communication signals to thereby detect the presence of the transponder in a defined area around the network node; said communication device is further configured such that it is operable in a second communication mode, in which the communication device emits, with a second transmit power, second communication signals for communication with the transponder, wherein the second transmit power is greater than the first transmit power; and the communication device is configured such that a change is effected from the first to the second transmit power when the presence of the transponder has been detected.