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Sounding reference signals with collisions in asymmetric carrier aggregation

專利號
US11159289B2
公開日期
2021-10-26
申請人
QUALCOMM Incorporated（US CA San Diego）
發(fā)明人
Alberto Rico Alvarino; Wanshi Chen; Peter Gaal; Jing Sun; Hao Xu; Srinivas Yerramalli
IPC分類
H04L5/00; H04L5/14; H04W72/04; H04W56/00
技術(shù)領域
srs,ue,uplink,cc,downlink,may,ccs,enb,subframe,in
地域： CA CA San Diego

摘要

An apparatus may use inactive uplink portions of a downlink CC to transmit SRS to an eNB. At times there may be a collision between the SRS transmission and uplink transmissions or downlink transmissions on another CC. The apparatus receives a carrier aggregation configuration for a first downlink CC and a second CC, determines to transmit an uplink transmission on the second CC or to receive a downlink transmission on the second CC, determines that the SRS would at least partially collide with the uplink transmission or the downlink transmission, and determines to adjust at least one of the uplink transmission, the SRS transmission, or reception of the downlink transmission based on the determination of the collision and an interruption time to transmit the SRS in the uplink portion of the first CC.

說明書

Some UEs may be configured with asymmetric CA in which there are more downlink component carriers than uplink component carriers. The downlink CCs may be time division duplex (TDD) and may include uplink portions. The UE may only be configured for downlink transmissions on one or more of the downlink CCs, without having an uplink portion of the CC configured for the UE to use for data transmission. However, SRS transmissions for the one or more downlink CCs could still be useful, and it may be important for the UE to be able to transmit SRS for such CCs.

Thus, the UE may be separately configured to use an inactive uplink portion of a downlink-only CC to transmit SRS to the base station. At times there may be a collision between such an SRS transmission and uplink transmissions or the reception of downlink transmissions on another configured CC. Aspects presented herein enable the UE to address the challenges associated with such collisions.

權(quán)利要求

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