| 摘要 |
A method of detecting a proximity to a target device. The method comprises scanning a wireless network frequency band in a personal mobile device to discover at least one wireless network signal, triggering, in response to a discovery of the at least one wireless network signal, a magnetic field scan of a magnetometer operated by the personal mobile device, detecting, in the personal mobile device, according to the magnetic field scan, a presence or an absence of a magnetic field signature associated with a predefined proximity to a target device. |
