Title:
TIMING ADVANCE ADJUSTMENT FOR DOWNLINK CARRIER AGGREGATION
Document Type and Number:
WIPO Patent Application WO/2021/026802
Kind Code:
A1
Abstract:
Methods, systems, and devices for wireless communications are described to enable a UE, a primary cell (PCell), and a secondary cell (SCell) to identify and use an adjusted transmission timing offset for reference signals transmitted to the SCell on a component carrier. The UE may receive downlink transmissions from the cells, determine a difference in transmission timing offsets, and transmit a report to the PCell. The PCell may adjust a timing advance (TA) command for the reference signals based on the report. The PCell may transmit a TA command to the UE indicating for the UE to autonomously adjust the transmission timing offset associated with the carrier of the SCell based on a difference between transmission timing offsets. One of the cells may trigger the UE to perform a random access procedure with the SCell over the carrier to determine a TA command for the reference signals.
Inventors:
CHEN BO (US)
HAO CHENXI (US)
WEI CHAO (US)
XU HAO (US)
HAO CHENXI (US)
WEI CHAO (US)
XU HAO (US)
Application Number:
PCT/CN2019/100541
Publication Date:
February 18, 2021
Filing Date:
August 14, 2019
Export Citation:
Assignee:
QUALCOMM INC (US)
CHEN BO (CN)
HAO CHENXI (CN)
WEI CHAO (CN)
XU HAO (CN)
CHEN BO (CN)
HAO CHENXI (CN)
WEI CHAO (CN)
XU HAO (CN)
International Classes:
H04W72/04
Domestic Patent References:
| WO2012119567A1 | 2012-09-13 |
Foreign References:
| US20150230268A1 | 2015-08-13 | |||
| US20130250929A1 | 2013-09-26 | |||
| EP2996418A1 | 2016-03-16 | |||
| US20140369242A1 | 2014-12-18 |
Other References:
DISH NETWORK, HUAWEI, HISILICON: "Text Proposal for TR 36.833-2-23: UE RRM requirements for LTE-Advanced intra-band non-contiguous Carrier Aggregation (CA) in Band 23", 3GPP DRAFT; R4-141377_TP_FOR_RRM_TR 36.833-2-23_LTE_CA_NC_B23, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. TSG RAN, no. San Jose Del Cabo, Mexico; 20140331 - 20140404, 21 March 2014 (2014-03-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP050822365
Attorney, Agent or Firm:
NTD PATENT & TRADEMARK AGENCY LTD. (CN)
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