Invention Grant
- Patent Title: Frequency offset delta tracking for NR connected mode discontinuous reception carrier aggregation
-
Application No.: US17447831Application Date: 2021-09-16
-
Publication No.: US11792881B2Publication Date: 2023-10-17
- Inventor: David Öhmann , Hongbo Yan , Amir Farajidana , Dietmar Gradl , Sami M. Almalfouh , Shengshan Cui
- Applicant: APPLE INC.
- Applicant Address: US CA Cupertino
- Assignee: APPLE INC.
- Current Assignee: APPLE INC.
- Current Assignee Address: US CA Cupertino
- Agency: Dorsey & Whitney LLP
- Main IPC: H04W76/28
- IPC: H04W76/28 ; H04L5/00 ; H04W52/02 ; H04W56/00 ; H04W72/0453

Abstract:
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 Δtupd, and schedules wake-ups on a first subset of the plurality of successive DRX cycles based on the minimum update interval Δtupd. 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.
Public/Granted literature
- US20230079512A1 FREQUENCY OFFSET DELTA TRACKING FOR NR CONNECTED MODE DISCONTINUOUS RECEPTION CARRIER AGGREGATION Public/Granted day:2023-03-16
Information query