Apple Inc. (Cupertino, CA)

The present disclosure provides embodiments that permit wireless connections between hosts device and an accessory device and the device. One example of a method for connecting an accessory device with an host device is by transmitting multiple beacons of advertising over wireless media. Each beacon could include information that indicates a date at which the device will begin the page scan. The accessory device can initiate the page scan at a specified time. It may also be able to receive pages from the host device within a page scan window over the wireless medium. You can make use of the pages received to create an ad-hoc network connection the accessory device and the host device.

Ad-hoc wireless networks that include hosts and an accessory device or two have become more popular in recent years. Wireless devices such as the smartphone as well as an accessory like wireless headphones can be connected to the smartphone and used to stream music and make phone calls. Wireless networks that are ad-hoc (e.g., Bluetooth networks) offer reliable and convenient connectivity between devices. They can be troublesome due to delay in setting up the network. The delay can adversely affect a user’s experience with usage of devices connected to the network.

The present disclosure provides an approach to create a connection between a host device and its accessory devices via the wireless medium. A number of accessory devices can be connected to a host device by different methods. The wireless transmission of multiple advertising beacons is possible. In certain instances an advertisement beacon could include information indicating a predetermined time when the accessory device willbegin a page scan. The accessory device may begin the page scan at a specified time and also receive pages from the host device using the wireless medium during page scanning. Some or all pages that are received can be used to create an an ad-hoc network connection between the accessory device and the host device.

In some embodiments, an advertising beacon could include information that identifies the duration of a page scan window, the value of a clock for the accessory device at the start of the page scan window, information that identifies a channel to be used in the window of page scan and/or a temporal offset from a time the advertised beacon is broadcast until the start of the page scan window. The beacons may be utilized as Bluetooth low-energy beacons, or beacons that conform to different radio protocols. The beacons for advertising can be sent at any time or at intervals determined by a dynamic algorithm. The advertising beacons can include information that is dynamically updated. In some cases the transmission of the advertising beacons as well as the opening of the page scan window could require a sequence of actions that cannot interrupt and must be completed prior to any other process can start.

Some embodiments may include devices and methods of establishing a connection over wireless media between these devices, e.g., between an accessory device and a host device. The methods may include receiving an advertising beacon containinginformation that identifies a time when the accessory device will begin a page scan window. The host device could continue to scan during the window of page scans, e.g. after or at the start of the page scan window as specified by the advertising beacon. The host device may then be able to connect to the accessory device via the wireless medium. In certain embodiments, the hostdevice may determine if the device is near to the host device based on received advertisingbeacons.

In some embodiments, a second beacon that also contains information identifying the time at which the accessory device will begin the page scan can also be transmitted/received. The transmission times of the second beacon may differ from the first beacon. However the information can be used to determine when the accessory device will begin the page scan.

Other embodiments comprise devices and methods of connecting the host device and an accessory device. In some embodiments the host device can detect that the device in question is near the host device. The accessory device could send a connection signal. The connection request might contain information that identifies a value for a clock on a host device. The accessory device can then acknowledge the host device. An exchange of data between the accessory device and the host device could then be established, e.g., in order to create an ad-hoc wireless network.

The host device may detect one or more wireless beacons that are transmitted by the accessory device to determine if the accessory device is within the range of the host device. The one or more beacons could be implemented as Bluetooth low energy beacons , or beacons that conform to other radio protocols, according to certain embodiments.

In certain embodiments, the devices for and methods of creating wireless connections between an accessory device and a host device are offered. The accessory device can send one or more advertising beacons in accordance with certain examples. The accessory device will receive a connection request from host device. The request for connection could contain information about the host device’s clock value. The clock on the local device of an accessory device could be synchronized with theclock of the host device and a connection with the host device could be established using the synchronized local clock.

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