US 12,432,705 B2
Communication apparatuses and communication methods for random access
Lei Huang, Singapore (SG); Hidetoshi Suzuki, Kanagawa (JP); Tien Ming Benjamin Koh, Singapore (SG); and Yang Kang, Singapore (SG)
Assigned to Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
Appl. No. 17/257,072
Filed by Panasonic Intellectual Property Corporation of America, Torrance, CA (US)
PCT Filed Jul. 16, 2019, PCT No. PCT/SG2019/050345
§ 371(c)(1), (2) Date Dec. 30, 2020,
PCT Pub. No. WO2020/085996, PCT Pub. Date Apr. 30, 2020.
Claims priority of application No. 10201809360V (SG), filed on Oct. 23, 2018.
Prior Publication US 2021/0127429 A1, Apr. 29, 2021
Int. Cl. H04W 74/0833 (2024.01); H04W 72/0453 (2023.01); H04W 74/00 (2009.01); H04W 74/08 (2024.01)
CPC H04W 74/0833 (2013.01) [H04W 72/0453 (2013.01); H04W 74/004 (2013.01); H04W 74/0891 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A communication apparatus, comprising:
a receiver, which, in operation, receives from a base station a synchronization signal block (SSB), and receives from the base station physical random access channel (PRACH) configuration information; and
a transmitter, which is coupled to the receiver and which, in operation, transmits a first random access preamble to the base station on a first physical random access channel occasion (RO) or a second RO among a plurality of RO candidates corresponding to a SSB index of the received SSB;
wherein the plurality of RO candidates corresponding to the SSB index are assigned within a plurality of frequency regions according to an assignment pattern based on the PRACH configuration information, wherein, in a same time, the first RO among the plurality of RO candidates is assigned within a first frequency region and the second RO among the plurality of RO candidates is assigned within a second frequency region, which is different from the first frequency region along a frequency axis,
wherein the PRACH configuration information includes prach-ConfigurationIndex which indicates PRACH time resources used for both the first RO and the second RO corresponding to the SSB index, and
wherein the plurality of RO candidates associated with a same SSB index are assigned in an order of the first frequency region and the second frequency region in a first time instance, and are assigned in the order of the first frequency region and the second frequency region in a second time instance.