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Power management in low power wireless link

  • US 8,190,189 B2
  • Filed: 01/20/2010
  • Issued: 05/29/2012
  • Est. Priority Date: 01/21/2009
  • Status: Active Grant
First Claim
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1. A communication system, comprising:

  • a first and a second communication device, each comprisingtransmit and receive units for establishing a wireless link between the devices,wherein at least the first communication device is a portable listening device and comprises a control unit for dynamically adjusting the transmit power of its transmit unit based on a measure of the quality of the link,the system is configured to use the dynamic transmit power adjusting to implement a partial power-down mode of the system, when the two communication devices are expected not to be in a normal use,the partial power-down mode at least comprises a power-down of the components related to the wireless link,the system is configured to be in an operational state or Normal mode when the first and second devices are within a Typical range of distances from each other, the Typical zone, andthe system is further configured to detect whether a transmitting device is located in a VeryClose zone, where the two devices are closer to each other than in the Typical zone and in which case the system is in a VeryClose mode and to detect whether a transmitting device is located in a VeryFar zone, where the two devices are farther away from each other than in the Typical zone and in which case the system is in a VeryFar mode.

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