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Method and apparatus for supporting RACH-less mobility with pre-allocated beams in wireless communication system

專利號
US11503634B2
公開日期
2022-11-15
申請人
LG ELECTRONICS INC.(KR Seoul)
發(fā)明人
Youngdae Lee; Yejee Lee; Sunyoung Lee
IPC分類
H04W74/02; H04W36/00; H04W36/02; H04W72/04; H04W72/14; H04W74/04; H04W74/08; H04W76/27; H04L5/00; H04W8/26
技術(shù)領(lǐng)域
ue,ho,rach,allocated,ul,gnb,target,message,pre,srs
地域: Seoul

摘要

A method and apparatus for supporting a random access channel (RACH)-less mobility with pre-allocated beams in a wireless communication system is provided. A user equipment (UE) receives a mobility command message which includes information on a pre-allocated UL resource for UL transmission with pre-allocated beams, synchronizes to a target cell, and performs the UL transmission to the target cell via the pre-allocated beams based on the pre-allocated UL resource for UL transmission to transmit a mobility complete message via a UL grant. If the UL transmission fails, the UE may perform RACH procedure.

說明書

1> if a DL assignment for this TTI and this serving cell has been received on the PDCCH for the MAC entity's C-RNTI, or temporary C-RNTI:

2> f this is the first DL assignment for this temporary C-RNTI:

3> consider the new data indicator (NDI) to have been toggled.

2> if the DL assignment is for the MAC entity's C-RNTI and if the previous DL assignment indicated to the HARQ entity of the same HARQ process was either a DL assignment received for the MAC entity's SPS C-RNTI or a configured DL assignment:

3> consider the NDI to have been toggled regardless of the value of the NDI.

2> indicate the presence of a DL assignment and deliver the associated HARQ information to the HARQ entity for this TTI.

1> else, if this serving cell is the special cell (SpCell) and a DL assignment for this TTI has been received for the SpCell on the PDCCH of the SpCell for the MAC entity's SPS C-RNTI:

2> if the NDI in the received HARQ information is 1:

3> consider the NDI not to have been toggled;

3> indicate the presence of a DL assignment and deliver the associated HARQ information to the HARQ entity for this TTI.

2> else, if the NDI in the received HARQ information is 0:

3> if PDCCH contents indicate SPS release:

4> clear the configured DL assignment (if any);

4> if the timeAlignmentTimer associated with the primary TAG (pTAG) is running:

5> indicate a positive acknowledgement for the DL SPS release to the physical layer.

3> else:

權(quán)利要求

1
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