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Sounding reference signals with collisions in asymmetric carrier aggregation

專利號(hào)
US11159289B2
公開日期
2021-10-26
申請(qǐng)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

At 1812, the eNB may instruct a UE to sound a plurality of CCs or a plurality of subbands of the first CC by transmitting a plurality of SRSs in uplink portions of at least one TDD CC on which the UE is configured for downlink portions and excluded for uplink portions, wherein the plurality of SRSs are transmitted in one of a plurality of CCs; a plurality of subbands in a same CC; and a same subband of the same CC using SRS repetition. The instruction at 1820 may be for a plurality of UEs to each sound a plurality of CCs by staggering transmissions by the plurality of UEs. The eNB may align a first SRS transmission of a first UE with a retuning period of a second UE. The instruction may instruct the UE to repeat the SRS and/or to apply a code cover to the SRS.

FIG. 19 is a conceptual data flow diagram 1900 illustrating the data flow between different means/components in an exemplary apparatus 1902. The apparatus may be an eNB. The apparatus includes a reception component 1904 that receives uplink communication eNB, including SRS, UE capabilities, and other uplink transmission and a transmission component 1906 that transmission downlink communication to at least one UE 1950. The transmission component 1906 may transmit a carrier aggregation configuration, as provided by CA component 1908, for a first CC to a UE, the first CC being a TDD CC, the configuration including downlink portions and excluding uplink portions of the first CC for use by the UE.

權(quán)利要求

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