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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.

說明書

In some aspects, the UE 120 includes means for receiving information configuring a target cell monitoring window in an NTN; means for detecting one or more events that trigger a random access channel (RACH) procedure in a target cell in the NTN; means for monitoring a control channel from the target cell for a control signal that includes an indication to initiate the RACH procedure in the target cell, wherein the control channel is monitored based at least in part on detecting the one or more events that trigger the RACH procedure in the target cell; and/or means for transmitting a random access message that includes a preamble to initiate the RACH procedure in the target cell, wherein the random access message is transmitted at a time that is based at least in part on a status associated with the control signal. The means for the UE 120 to perform operations described herein may include, for example, one or more of communication manager 140, antenna 252, modem 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, controller/processor 280, or memory 282.

While blocks in FIG. 2 are illustrated as distinct components, the functions described above with respect to the blocks may be implemented in a single hardware, software, or combination component or in various combinations of components. For example, the functions described with respect to the transmit processor 264, the receive processor 258, and/or the TX MIMO processor 266 may be performed by or under the control of the controller/processor 280.

權(quán)利要求

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