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DETECTING A WLAN SIGNAL USING A BLUETOOTH RECEIVER DURING BLUETOOTH SCAN ACTIVITY

  • US 20110274021A1
  • Filed: 05/05/2011
  • Published: 11/10/2011
  • Est. Priority Date: 05/07/2010
  • Status: Active Grant
First Claim
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1. A method comprising:

  • (a) using a Bluetooth (BT) receiver Radio Frequency (RF) front end in a page scan mode to receive in a sequence of BT scan windows;

    (b) receiving Wireless Local Area Network (WLAN) energy onto the Bluetooth (BT) receiver RF front end during one of the BT scan windows;

    (c) using an energy detector to process an output signal of the BT receiver RF front end when the BT receiver RF front end is receiving the WLAN energy during the one of the BT scan windows; and

    (d) based at least in part on a result of the processing of (c) asserting a wake-up signal, wherein the asserting of the wake-up signal is indicative of the BT receiver RF front end having received the WLAN energy during the one of the BT scan windows.

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