Invention Grant
- Patent Title: Selection of synchronization stations in a peer-to-peer network environment
- Patent Title (中): 在对等网络环境中选择同步站
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Application No.: US13657707Application Date: 2012-10-22
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Publication No.: US09516615B2Publication Date: 2016-12-06
- Inventor: Robert J. Stacey , Pierre B. Vandwalle , Christiaan A. Hartman
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04W56/00
- IPC: H04W56/00 ; H04L29/08 ; H04W84/20

Abstract:
A system, apparatus and method for selecting one or more synchronization stations, or masters, in a peer-to-peer communication environment. Synchronization (or sync) stations broadcast periodic synchronization frames to advertise future availability windows, during which devices rendezvous for discovery and communication. Devices that can act as sync stations advertise preference values, which indicate their preference or suitability for the role. All devices execute the same algorithm to sort the preference values and identify a root sync station and any number of branch sync stations; leaf devices synchronize with the root or a branch sync station. This passive synchronization scheme allows individual devices to conserve power, because they need not actively discover other devices and services, and can power off their radios for periods of time without sacrificing discoverability. Synchronization and peer-to-peer communication as provided herein coexist with other device demands, such as Bluetooth® operations and infrastructure-based communications.
Public/Granted literature
- US20130132502A1 SELECTION OF SYNCHRONIZATION STATIONS IN A PEER-TO-PEER NETWORK ENVIRONMENT Public/Granted day:2013-05-23
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