公开(公告)号：US20200252894A1

公开(公告)日：2020-08-06

申请号：US16852715

申请日：2020-04-20

Applicant: Sony Corporation

Inventor： BRIAN ALEXANDER MARTIN ,  Hiromasa UCHIYAMA ,  Shinichiro TSUDA ,  Hideji WAKABAYASHI

IPC: H04W56/00 ,  H04W72/04 ,  H04W68/02 ,  H04L5/00 ,  H04W76/14

Abstract: A wireless telecommunications system including first and second terminal devices operable to communicate with one another in a synchronized device-to-device manner. The second terminal device is operable to selectively achieve synchronization for receiving data transmissions from the first terminal device using direct synchronization signalling transmitted by the first terminal device or indirect synchronization signalling transmitted by another network entity, such as a base station. The second terminal device is configured to preferentially seek indirect synchronization over direct synchronization, unless the second terminal device detects synchronization signalling transmitted by the first terminal device is associated with a predefined characteristic that indicates the synchronization signalling transmitted by the first terminal device is high priority synchronization signalling, in which case the second terminal device is configured to preferentially seek synchronization using the high priority direct synchronization signalling from the first terminal device over indirect synchronization signalling transmitted by the other network entity.