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Initiating random access in a target cell in a non-terrestrial network

專利號(hào)
US11617215B2
公開日期
2023-03-28
申請(qǐng)人
QUALCOMM Incorporated(US CA San Diego)
發(fā)明人
Bharat Shrestha; Umesh Phuyal; Ayan Sengupta; Alberto Rico Alvarino; Liangping Ma; Xiao Feng Wang
IPC分類
H04W56/00; H04W74/08; H04W74/00; H04W36/00; H04W24/08; H04W84/06
技術(shù)領(lǐng)域
rach,ue,cell,target,or,in,may,ues,procedure,station
地域: CA CA San Diego

摘要

Various aspects described herein relate to dynamically controlling a time when random access initiated in a target cell of a non-terrestrial network. For example, when a user equipment (UE) detects an event that triggers a random access procedure in the target cell, the UE may monitor a control channel from the target cell for a control signal during a target cell monitoring window prior to initiating random access in the target cell. For example, the control signal may include a dynamic indication to identify UEs allowed to initiate random access, whereby a UE is not permitted to autonomously start contention-based random access in the target cell during the target cell monitoring window unless the UE has received the control signal. In this way, the target cell may regulate a rate at which UEs initiate the RACH procedure in order to manage congestion in the target cell.

說(shuō)明書

As shown in FIG. 7A, at 705, one or more UEs may receive information that configures a target cell monitoring window. For example, the target cell monitoring window may be configured in cell-specific signaling (e.g., a SIB broadcasted or otherwise transmitted by the source cell and/or the target cell), in UE-specific signaling (e.g., in a dedicated RRC message transmitted by the source cell and/or the target cell, such as an RRC reconfiguration message, or in a handover command message transmitted by the source cell to trigger a handover to the target cell), and/or in group-specific signaling (e.g., signaling addressed to a group of UEs based on location, UE identifiers, UE capabilities, and/or other suitable criteria). In some aspects, the information that configures the target cell monitoring window may indicate a start time and/or a length of the target cell monitoring window.

權(quán)利要求

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