公开(公告)号：EP4152840A1

公开(公告)日：2023-03-22

申请号：EP22195596.6

申请日：2022-09-14

申请人： Apple Inc.

发明人： ÖHMANN, David ,  YAN, Hongbo ,  FARAJIDANA, Amir ,  GRADL, Dietmar ,  ALMALFOUH, Sami M. ,  CUI, Shengshan

IPC分类号： H04W56/00 ,  H04W52/02

摘要： Systems and methods are provided for a user equipment (UE) to perform frequency offset (FO) delta tracking. For an anchor component carrier (CC), the UE wakes up to perform tracking updates on a plurality of successive DRX cycles. For the non-anchor CC, the UE determines a minimum update interval Δt upd , and schedules wake-ups on a first subset of the plurality of successive DRX cycles based on the minimum update interval Δt upd . For the first subset of the plurality of successive DRX cycles with scheduled wake-ups, the UE performs the tracking updates on the non-anchor CC and updates an FO delta between the anchor CC and the non-anchor CC. For a second subset of the plurality of successive DRX cycles without the scheduled wake-ups on the non-anchor CC, the UE applies the FO delta to correct for a frequency error.