US 12,096,482 B2
Method and apparatus for transmitting and receiving data in wireless communication system
Donggun Kim, Suwon-si (KR); Jaehyuk Jang, Suwon-si (KR); Anil Agiwal, Bangalore (IN); Sangkyu Baek, Suwon-si (KR); and Soenghun Kim, Suwon-si (KR)
Assigned to Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Oct. 7, 2022, as Appl. No. 18/045,083.
Application 18/045,083 is a continuation of application No. 17/250,279, granted, now 11,470,652, previously published as PCT/KR2019/007891, filed on Jun. 28, 2019.
Claims priority of application No. 10-2018-0075593 (KR), filed on Jun. 29, 2018.
Prior Publication US 2023/0112196 A1, Apr. 13, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/0833 (2024.01); H04W 74/04 (2009.01); H04W 74/08 (2024.01); H04W 76/27 (2018.01)
CPC H04W 74/0833 (2013.01) [H04W 74/04 (2013.01); H04W 74/0891 (2013.01); H04W 76/27 (2018.02)] 10 Claims
OG exemplary drawing
 
1. A method of performing a random access procedure, the method being performed by a user equipment (UE) and comprising:
transmitting, as a response to a first random access response (RAR), a message3 (Msg3) for a contention-based random access comprising a first media access control protocol data unit (MAC PDU), wherein the first MAC PDU comprises a cell-radio network temporary identifier MAC control element (C-RNTI MAC-CE) and a radio resource control (RRC) message for a handover completion, and the first MAC PDU is stored in a Msg3 buffer;
if the Msg 3 is transmitted, determining whether contention resolution for the contention-based random access is considered successful; and
in case that the contention resolution for the contention-based random access is considered not successful, performing a contention-free random access procedure,
wherein the performing of the contention-free random access procedure comprises:
transmitting a contention-free random access preamble;
receiving a second RAR corresponding to the contention-free random access preamble;
in case that a size of UL resource allocation in the second RAR does not match with a size of the first MAC PDU obtained from the Msg3 buffer, obtaining a second MAC PDU including at least one MAC subprotocol data unit (MAC subPDU), wherein the at least one MAC subPDU includes the RRC message for the handover completion which is comprised in the first MAC PDU obtained from the Msg3 buffer; and
transmitting the second MAC PDU.