US 11,963,056 B2
Layer 2 operation for Layer 1 and Layer 2-centric inter-cell mobility
Fangli Xu, Beijing (CN); Chunhai Yao, Beijing (CN); Dawei Zhang, Cupertino, CA (US); Haijing Hu, Cupertino, CA (US); Qiming Li, Beijing (CN); Wei Zeng, Cupertino, CA (US); Yang Tang, Cupertino, CA (US); Yuqin Chen, Beijing (CN); and Yushu Zhang, Beijing (CN)
Assigned to APPLE INC., Cupertino, CA (US)
Appl. No. 17/593,228
Filed by APPLE INC., Cupertino, CA (US)
PCT Filed Apr. 1, 2021, PCT No. PCT/CN2021/084934
§ 371(c)(1), (2) Date Sep. 13, 2021,
PCT Pub. No. WO2022/205310, PCT Pub. Date Oct. 6, 2022.
Prior Publication US 2023/0209423 A1, Jun. 29, 2023
Int. Cl. H04W 36/08 (2009.01); H04W 36/00 (2009.01); H04W 76/20 (2018.01); H04W 76/30 (2018.01)
CPC H04W 36/08 (2013.01) [H04W 36/0033 (2013.01); H04W 76/20 (2018.02); H04W 76/30 (2018.02)] 20 Claims
OG exemplary drawing
 
1. A method for Layer 2 (L2) handling during a cell change procedure at a user equipment (UE), comprising:
decoding a radio resource control (RRC) reconfiguration message received from a first cell, the RRC reconfiguration message including a Layer 1 (L1) configuration corresponding to a second cell, wherein the first cell and the second cell share a service data adaptation protocol (SDAP) entity, a packet data convergence protocol (PDCP) entity, a radio link control (RLC) entity, and a medium access control (MAC) entity, the first cell and the second cell each having a separate L1 entity;
in response to decoding the RRC reconfiguration message, storing the L1 configuration corresponding to the second cell;
decoding a cell change message received from the first cell, the cell change message indicating that a cell change from the first cell to the second cell is to be performed;
in response to decoding the cell change message, applying the stored L1 configuration corresponding to the second cell for data transmission and reception associated with the second cell; and
initiating a cell change to the second cell.