ALERTING SYSTEM AND METHOD FOR PORTABLE ELECTRONIC DEVICE

摘要

An alerting method for portable electronic devices, the alerting method being performed by at least one of first and second portable devices. The method includes first and second electronic devices communicating with one another through two different wireless channels, the first channel providing longer range communications than the second channel. The second electronic device may enter an alarm mode of operation if communications through a channel fails. The second electronic device may exit the alarm mode of operation if communications through the other channel are restored.

主权项

1. An alerting method for a portable electronic device, the alerting method being performed by a second portable electronic device communicating with a first portable electronic device through first and second wireless communication methods different from each other and comprising:
determining a distance between the first and second portable electronic devices through the first wireless communication method; issuing an alarm when the distance is greater than a reference distance; the second portable electronic device attempting to identify the first portable electronic device through the second wireless communication method; and canceling the alarm when the second portable electronic device identifies the first portable electronic device.