SYNCHRONIZED LOW-ENERGY DETECTION TECHNIQUE

摘要

In order to reduce the power consumption after a transmitting electronic device in a wireless network has been detected, a receiving electronic device calculates transmit times of subsequent beacons from the transmitting electronic device based on a clock drift of the transmitting electronic device and the beacon period. Then, the receiving electronic device receives the subsequent beacon by opening scan windows that encompass the calculated transmit times. However, because the transmit times are more predictable after the transmitting electronic device has been detected (and the clock drift of the transmitting electronic device is known to the receiving electronic device), the receiving electronic device can reduce the width of the scan windows. In addition, the transmitting electronic device can further reduce the power consumption by increasing the beacon period.

主权项

1. A receiving electronic device, comprising:
an antenna; and an interface circuit, coupled to the antenna, configured to communicate with a transmitting electronic device, wherein the interface circuit is configured to:
detect, during a scan window, the transmitting electronic device by receiving a beacon in a set of beacons having an initial beacon period, wherein the initial beacon period and the interface circuit uses scan windows having an initial window width and an initial window period;calculate transmit times of subsequent beacons from the transmitting electronic device based on clock drift of the transmitting electronic device; andreceive the subsequent beacons from the transmitting electronic device during subsequent scan windows that encompass the calculated transmit times of the subsequent beacons, wherein the subsequent scan windows have widths that are less than the initial width.