公开(公告)号：US20190045483A1

公开(公告)日：2019-02-07

申请号：US16053186

申请日：2018-08-02

Applicant: Apple Inc.

Inventor： Tarik Tabet ,  Lydi Smaini ,  Ronald W. Dimpflmaier ,  Matthias Sauer ,  Jason C. Fan

IPC: H04W72/00 ,  H04W56/00 ,  H04W4/06 ,  H04W48/10 ,  H04W72/08 ,  H04W36/00

Abstract: This disclosure relates to techniques for supporting narrowband device-to-device wireless communication, including possible techniques for 1) handing off from one master to another and 2) relaying shifted device-to-device synchronization signals in an off grid radio system. The techniques herein may allow for a successor master device to take over a master role, including by transmitting synchronization signals. The techniques herein may allow for a repeater device to expand the boundary of a device-to-device communication group by transmitting synchronization signals that are shifted relative to synchronization signals transmitted by a master device.