US 12,267,869 B2
Systems and methods for two-step random access procedure
Liqing Zhang, Ottawa (CA); Jiayin Zhang, Shanghai (CN); and Mohamed Adel Salem, Kanata (CA)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Apr. 23, 2021, as Appl. No. 17/238,655.
Application 17/238,655 is a continuation of application No. PCT/CN2019/112226, filed on Oct. 21, 2019.
Claims priority of provisional application 62/751,073, filed on Oct. 26, 2018.
Prior Publication US 2021/0243814 A1, Aug. 5, 2021
Int. Cl. H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) 28 Claims
OG exemplary drawing
 
1. A method, comprising:
transmitting, by an apparatus, a random access preamble on a random access channel in a message; and
transmitting, by the apparatus, data on an uplink data channel using an uplink data channel resource in the message, wherein the uplink data channel resource is configured with a modulation and coding scheme (MCS) for transmission of the data,
wherein the uplink data channel resource is associated with a demodulation reference signal (DMRS), and wherein the random access preamble transmitted in the random access channel is mapped to the uplink data channel resource and the DMRS,
wherein there is a mapping between the random access channel and the uplink data channel resource, wherein the mapping is based on a relative time location of the uplink data channel resource to the random access channel in which the random access preamble is transmitted, wherein the relative time location is indicated by broadcast signaling or radio resource control (RRC) signaling, and
wherein an index of the random access preamble is used for the mapping from the random access preamble to the uplink data channel resource.