CONFIGURATION OF NON-ORTHOGONAL DMRS FOR UPLINK TRANSMISSION

Title:

CONFIGURATION OF NON-ORTHOGONAL DMRS FOR UPLINK TRANSMISSION

Document Type and Number:

WIPO Patent Application WO/2019/154400

Kind Code:

A1

Abstract:

Aspects of the present disclosure provide techniques for grouping demodulation reference signal (DMRS) sequences for uplink transmission without grant based on one or more of cross correlation of sequences, the cubic metric or peak-to-average power ratio (PAPR). In accordance with this technique, the power control for transmissions of DMRS can also be exploited to enhance sequence grouping. Features of the present disclosure may prepare a composite sequence that is generated by concatenating two base sequences. In this instance, the base station may provide UEs with a pool of base sequences. For transmission of DMRS, the UEs may select two base sequences that may be transmitted in two consecutive slots or two DMRS symbols in a slot. By allowing the UE to select two base sequences, the network may reduce the probability of a collision that may occur when two UEs select the same base sequence.

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Inventors:

WEI CHAO (US)
LI QIAOYU (US)
CHENG PENG (US)

Application Number:

PCT/CN2019/074729

Publication Date:

August 15, 2019

Filing Date:

February 06, 2019

Export Citation:

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Assignee:

QUALCOMM INC (US)
WEI CHAO (CN)
LI QIAOYU (CN)
CHENG PENG (CN)

International Classes:

H04W72/04

Domestic Patent References:

WO2006011953A2	2006-02-02
WO2018021825A1	2018-02-01

Foreign References:

CN102404854A	2012-04-04
US20080318608A1	2008-12-25
CN107623563A	2018-01-23

Other References:

ZTE: "Group-based Re-ordering Method of ZC Sequence in RACH", 3GPP TSG RAN WGI #50 MEETING RI -073595, 24 August 2007 (2007-08-24), XP050107194
"Binding method for UL RS se-quence with different lengths", R1-075048; 3GPP TSG RAN WG1 #51; JEJU, KOREA, 5 November 2007 (2007-11-05)
See also references of EP 3750362A4

Attorney, Agent or Firm:

NTD PATENT & TRADEMARK AGENCY LTD. (CN)

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