US 12,335,175 B2
Reference signal transmission method and device
Xiaotao Ren, Beijing (CN); Rui Zhao, Beijing (CN); Fangchen Cheng, Beijing (CN); and Shilei Zheng, Beijing (CN)
Assigned to DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
Appl. No. 17/420,647
Filed by DATANG MOBILE COMMUNICATIONS EQUIPMENT CO., LTD., Beijing (CN)
PCT Filed Dec. 26, 2019, PCT No. PCT/CN2019/128530
§ 371(c)(1), (2) Date Jul. 2, 2021,
PCT Pub. No. WO2020/143457, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 201910021159.4 (CN), filed on Jan. 9, 2019.
Prior Publication US 2022/0077983 A1, Mar. 10, 2022
Int. Cl. H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 4/40 (2018.01); H04W 72/04 (2023.01); H04W 72/0446 (2023.01)
CPC H04L 5/0048 (2013.01) [H04L 27/2613 (2013.01); H04W 4/40 (2018.02); H04W 72/0446 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A reference signal transmission method for a Vehicle-to-Everything (V2X) system, comprising:
receiving, by a first device, a first reference signal transmitted by another device via a sidelink; and
performing, by the first device, in accordance with the first reference signal, at least two of: an Automatic Gain Control (AGC) process, a Frequency Offset Estimation (FOE) process, a Channel State Information (CSI) measurement process, a channel estimation process,
wherein the first reference signal is located on a first symbol within a slot, a first Sub-Carrier Spacing (SCS) of the first reference signal is different from a second SCS of Scheduling Assignment (SA) or Data transmitted subsequently by the other device, and a size of the first SCS is set in such a manner that the quantity of subcarriers in the operating bandwidth for the other device is sufficient to meet a requirement on accommodating the first reference signal,
the first reference signal is mapped to an entirety of a system operating bandwidth in a comb-type mapping mode in a frequency domain, and different devices occupy different comb tooth positions,
the quantity of symbols occupied by the first reference signal is determined in accordance with the SCS adopted by the first reference signal.