Abstract: The present invention relates to a system and method for improving directed connectable advertising in a low energy Bluetooth device. The host on the Bluetooth device configures an advertisement interval length, an advertisement window length, and a number of attempts. The advertisement window length is equal to or shorter than the advertisement interval length, which may be less than 1.28 seconds. Next, advertising packets are transmitted for the length of the advertising window on three advertising channels. Packets are transmitted consecutively, with no more than a 3.75 millisecond delay between packets, until the end of the advertisements window. After transmitting, a link layer of the Bluetooth device decrements the number of attempts. Once all attempts have been exhausted, the advertisements end. Otherwise, the link layer waits for the end of the advertisement interval.

Abstract: The present invention relates to a system and method for improving scanning in a low energy Bluetooth device. The host configures a scan interval length, and a scan window length. The scan window length is equal to or shorter than the scan interval length. Next, a link layer initiates a scan interval, and also generates a random delay. The random delay may be anywhere between zero and the difference between the scan window length and the scan interval length. The link layer waits for the delay to complete before scanning is performed by the transceiver. The transceiver scans for the duration of the scan window. After scanning, the system waits for the end of the scan interval before the link layer generates a subsequent randomized delay and the transceiver again scans for the duration o the scan window. This process may continue indefinitely until a connection is established. In some embodiments, the scan window may be subdivided into a number of sub-windows, each preceded by a randomized delay.