公开(公告)号：EP3944517A1

公开(公告)日：2022-01-26

申请号：EP21186026.7

申请日：2021-07-16

申请人： Samsung Electronics Co., Ltd.

发明人： HOSSEINIAN, Seyed Mohsen ,  BAE, Jung Hyun ,  HATAMI, Homayoon ,  LEE, Jungwon

IPC分类号： H04B7/185 ,  H04W56/00 ,  H04W74/08

摘要： A system and method for random access procedures in a non-terrestrial network. In some embodiments, the method includes calculating (605), by a user equipment, UE, a timing advance based on location information of the UE and on an ephemeris of a non-terrestrial network node. The method may further include randomly selecting (610) a random value from a plurality of values, and sending (615), at a transmission time, by the UE, to the non-terrestrial network node, a random access, RA, message, which may include a signature. The transmission time may differ from a nominal transmission time by an amount based on the random value, the nominal transmission time being based on the timing advance, or the signature may differ from a nominal signature by a cyclic shift based on the random value.

公开(公告)号：EP3913996A1

公开(公告)日：2021-11-24

申请号：EP21172823.3

申请日：2021-05-07

申请人： Samsung Electronics Co., Ltd.

发明人： HOSSEINIAN, Seyed Mohsen ,  BAE, Junghyun ,  HATAMI, Homayoon ,  LEE, Jungwon

IPC分类号： H04W56/00 ,  H04B7/185

摘要： A method of enabling communication between a user equipment, UE, (101) and a non-terrestrial network, NTN, (100) is described. The UE (101) may be able to calculate a timing advance. The timing advance may be a differential or full timing advance. An offset value, K offset , may be indicated to the UE (101). The K offset may be used for timing relationships.