Invention Grant
- Patent Title: Device synchronization over bluetooth
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Application No.: US14496314Application Date: 2014-09-25
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Publication No.: US09848069B2Publication Date: 2017-12-19
- Inventor: Adam Geboff , Sriram Hariharan , Joakim Linde , Li-Quan Tan , Shahrooz Shahparnia
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Downey Brand LLP
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04W56/00 ; H04L29/08 ; H04L29/06 ; H04W52/02

Abstract:
Time synchronization between a central wireless communication device and a peripheral wireless communication device is described. Events associated with an application are time stamped at the central wireless communication device, and one or more link layer messages are sent to the peripheral wireless communication device to provide time stamp information to replicate the event timing at the peripheral wireless communication device. A first link layer message includes information about an internal Bluetooth clock to calibrate a corresponding internal clock value at the peripheral wireless communication device. A second link layer message includes information about a current value for the Bluetooth clock and also a value for an offset that provides a time position at a finer granularity than the Bluetooth clock within a timeslot specified by the Bluetooth clock value. Application layer event synchronization between the central and peripheral wireless communication devices allow for power reduced dormant states between events.
Public/Granted literature
- US20150092642A1 DEVICE SYNCHRONIZATION OVER BLUETOOTH Public/Granted day:2015-04-02
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