PREAMBLE TO DEMODULATION REFERENCE SIGNAL MAPPING FOR RANDOM ACCESS PROCEDURES

Abstract

Methods, systems, and devices for wireless communications are described. A base station may determine a relationship between preamble sequences of a preamble portion of a random access message and resources for demodulation reference signal (DMRS) sequences and physical uplink shared channel (PUSCH) occasions of a payload portion of a random access message. The base station may map some preamble sequences to some of the DMRS sequences and PUSCH payloads within a mapping period. The base station may transmit, to a user equipment (UE), an indication of the mapping rule between the preamble sequences and the DMRS sequences and payloads. The UE may transmit, based on determining the relationship, at least one preamble sequence in a preamble occasion and at least one DMRS sequence and one payload of the random access message in a PUSCH occasion based on the configured mapping rule.

Inventors

LEI, Jing
PARK, Seyong
HE, LINHAI
ZHENG, RUIMING
HUANG, YI
JI, TINGFANG

Assignees

QUALCOMM Incorporated

Dates

Publication Date: 20260506
Application Date: 20200320