Invention Grant
- Patent Title: Two stage role switch for fully wireless earbuds
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Application No.: US16804506Application Date: 2020-02-28
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Publication No.: US11272571B2Publication Date: 2022-03-08
- Inventor: Shijing Xian , Guang Xie , Jeffrey Kuramoto
- Applicant: Google LLC
- Applicant Address: US CA Mountain View
- Assignee: Google LLC
- Current Assignee: Google LLC
- Current Assignee Address: US CA Mountain View
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Main IPC: H04W84/20
- IPC: H04W84/20 ; H04M1/60 ; H04N21/44 ; H04R1/10

Abstract:
The present disclosure provides for role switch with perceptible continuity of audio streaming during the role switch. The role switch occurs in two stages, with a first stage including a host link role switch and a second stage including a relay link role switch. For example, the host link role switch concerns the relationship of each audio receiver device to the host device, where the master device receives audio directly from the host for relay to the slave. The relay link role switch concerns a relationship between the audio receiver devices. For example, the communication master controls timing, such as when to send packets between the master and slave devices. Each stage of the two stage procedure may take approximately 100 ms or less. Between each stage, the audio buffers of the master and slave devices have an opportunity to refill.
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