Invention Grant
- Patent Title: Method and system for initial synchronization and collision avoidance in device to device communications without network coverage
- Patent Title (中): 无网络覆盖的设备到设备通信的初始同步和避免冲突的方法和系统
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Application No.: US13962708Application Date: 2013-08-08
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Publication No.: US09210690B2Publication Date: 2015-12-08
- Inventor: Yufei Wu Blankenship , Sagar Dhakal , Nam Nguyen
- Applicant: BlackBerry Limited
- Applicant Address: CA Waterloo, Ontario
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: CA Waterloo, Ontario
- Agency: Fish & Richardson P.C.
- Main IPC: H04W72/02
- IPC: H04W72/02 ; H04W4/00 ; H04W76/02 ; H04B7/26 ; H04W56/00 ; H04W74/08
Abstract:
A method at a first device for enabling a device-to-device wireless link, the method detecting whether a presence signal of a second device is received over a first time period, the presence signal of the second device having a time-slot boundary; and if the presence signal of the second device is not detected, initiating a time-slot boundary by the first device including: transmitting a first presence signal of the first device in a selected time-slot; and checking for an acknowledgment to the first presence signal.
Public/Granted literature
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