US 12,439,392 B2
Uplink carrier selection for PRACH transmission between a NR dedicated carrier and a LTE/NR shared carrier
Caroline Liang, Tokyo (JP)
Assigned to NEC CORPORATION, Tokyo (JP)
Filed by NEC Corporation, Tokyo (JP)
Filed on May 16, 2024, as Appl. No. 18/666,004.
Application 18/666,004 is a continuation of application No. 18/448,560, filed on Aug. 11, 2023, granted, now 12,101,824.
Application 18/448,560 is a continuation of application No. 17/546,635, filed on Dec. 9, 2021, granted, now 11,765,775, issued on Sep. 19, 2023.
Application 17/546,635 is a continuation of application No. 16/623,006, granted, now 11,546,943, issued on Jan. 3, 2023, previously published as PCT/JP2018/022568, filed on Jun. 13, 2018.
Claims priority of application No. 1709678 (GB), filed on Jun. 16, 2017.
Prior Publication US 2024/0306214 A1, Sep. 12, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2024.01); H04W 72/0453 (2023.01); H04W 74/00 (2009.01); H04W 74/0833 (2024.01); H04B 1/40 (2015.01); H04W 84/04 (2009.01)
CPC H04W 74/0833 (2013.01) [H04W 72/0453 (2013.01); H04W 74/004 (2013.01); H04B 1/40 (2013.01); H04W 84/042 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method performed by a user equipment (UE) that is configured with a uplink (UL) carrier and a supplementary UL (SUL) carrier, the method comprising:
selecting one UL carrier of the UL carrier or the SUL carrier for a physical random access channel (PRACH) transmission, based on a reference signal received power; and
sending at least one message as the PRACH transmission using the one UL carrier,
wherein the UL carrier is included in an operating frequency band on a first Radio Access Technology, RAT,
the SUL carrier is included in an operating frequency band on the first RAT and a second RAT, and
the first RAT is new radio (NR) or 5th Generation (5G) and the second RAT is long term evolution (LTE) or Evolved Universal Terrestrial Radio Access (E-UTRA).