US 12,082,090 B2
Narrowband reference signal transmission for measurement and synchronization
Wenting Chang, Beijing (CN); Huaning Niu, San Jose, CA (US); Salvatore Talarico, Sunnyvale, CA (US); Qiaoyang Ye, San Jose, CA (US); and Rongrong Sun, Beijing (CN)
Assigned to Apple Inc., Cupertino, CA (US)
Appl. No. 17/264,685
Filed by Apple Inc., Cupertino, CA (US)
PCT Filed Jul. 31, 2019, PCT No. PCT/US2019/044383
§ 371(c)(1), (2) Date Jan. 29, 2021,
PCT Pub. No. WO2020/028510, PCT Pub. Date Feb. 6, 2020.
Claims priority of provisional application 62/713,380, filed on Aug. 1, 2018.
Prior Publication US 2021/0306834 A1, Sep. 30, 2021
Int. Cl. H04W 4/80 (2018.01); H04L 5/00 (2006.01); H04L 27/26 (2006.01); H04W 72/044 (2023.01); H04W 72/0446 (2023.01); H04W 72/23 (2023.01)
CPC H04W 4/80 (2018.02) [H04L 5/0012 (2013.01); H04L 5/0051 (2013.01); H04L 27/2614 (2013.01); H04W 72/0446 (2013.01); H04W 72/0473 (2013.01); H04W 72/23 (2023.01)] 20 Claims
OG exemplary drawing
 
1. A non-transitory computer-readable medium having instructions that, when executed by one or more processors, cause a base station to perform operations, the operations comprising:
generating subframes for Unlicensed Internet of Things (U-IoT) communications, the subframes comprising an anchor segment on a first plurality of subframes, and a data segment on a second plurality of subframes,
wherein the anchor segment includes a narrowband reference signal (NRS) configured to be transmitted in a minimum set of the first plurality of subframes at a first transmit power; and
transmitting the first plurality of subframes and the second plurality of subframes.