Patent ID: 7539520
Filing Date: 2009-05-26
Classification: H04W,Y02D

Abstract:
1. A wireless data communication device, comprising: (a) a radio configured to power down to conserve energy and to power up in response to receipt of a wired electronic signal, the radio comprising a first receiver and a first transmitter; (b) a wake-up transceiver comprising a second transmitter and a second receiver, the wake-up transceiver configured to, (c) a power source for powering at least one of the radio and the wake-up transceiver; (d) wherein the second receiver of the wake-up transceiver is configured to draw less current than the first receiver of the radio while screening radio frequency broadcasts for specific data therein that identifies the radio frequency broadcast as a wake-up signal; and (e) wherein the second transmitter of the wake-up transceiver is configured to draw less current than the first transmitter of the radio when transmitting radio frequency broadcasts that include specific data therein that identifies the radio frequency broadcasts as wake-up signals.