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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(lǐng)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

FIG. 12 is a flowchart 1200 of a method of wireless communication. The method may be performed by a UE (e.g., the UE 104, 350, the apparatus 1602/1602′). At 1202, the UE receives a CA configuration for a first CC and a second CC, the first CC being a TDD CC, the CA configuration including downlink portions and excluding uplink portions of the first CC for data transmission by the UE. Thus, the first CC may be referred to as a downlink only CC, a CC for which the UE is unconfigured for portions of the uplink, or a CC for which the uplink portions are inactive.

At 1204, the UE determines whether to transmit an uplink transmission on a second CC in a subframe, at 1206 the UE determines whether to receive a downlink transmission in the subframe on the second CC.

When the UE has determined to transmit an uplink transmission at 1204 or to receive a downlink transmission at 1206, the UE determines, at 1208, whether a transmission of an SRS in an uplink portion of the first CC would at least partially collide in the subframe with one of the uplink transmission from 1204 or the downlink transmission from 1206. If the UE does not determine that a collision would occur, the UE transmits the uplink transmission at 1209 or receives the downlink transmission at 1211.

權(quán)利要求

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