US 11,800,563 B2
Random access with new radio unlicensed cells
Joseph M. Murray, Schwenksville, PA (US); Pascal M. Adjakple, Great Neck, NY (US); Lakshmi R. Iyer, King of Prussia, PA (US); Mohamed Awadin, Plymouth Meeting, PA (US); Allan Y. Tsai, Boonton, NJ (US); Yifan Li, Conshohocken, PA (US); and Guodong Zhang, Woodbury, NY (US)
Assigned to IPLA HOLDINGS INC., New York, NY (US)
Filed by IPLA HOLDINGS INC., New York, NY (US)
Filed on Jun. 16, 2022, as Appl. No. 17/841,662.
Application 17/841,662 is a continuation of application No. 17/044,979, granted, now 11,432,328, previously published as PCT/US2019/025810, filed on Apr. 4, 2019.
Claims priority of provisional application 62/753,593, filed on Oct. 31, 2018.
Claims priority of provisional application 62/652,710, filed on Apr. 4, 2018.
Prior Publication US 2022/0312484 A1, Sep. 29, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 74/08 (2009.01); H04W 74/00 (2009.01); H04W 72/23 (2023.01)
CPC H04W 74/0816 (2013.01) [H04W 72/23 (2023.01); H04W 74/002 (2013.01); H04W 74/085 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A user equipment comprising circuitry, the circuitry configured to
receive, from a network node, a configuration including a first threshold with respect to a first counter for falling back to 4-step random access (RA);
based on confirming that a value of the first counter is not greater than the first threshold, increment a second counter and transmit a MsgA as a 2-step RA preamble transmission to the network node, the second counter being for calculating a RA target power for the 2-step RA preamble transmission;
receive, from the network node, a MsgB as a Random Access Response (RAR) for the 2-step RA preamble transmission, wherein the MsgB is comprised of an indication that a MsgA payload was unsuccessfully decoded and uplink (UL) grant for a Msg3 transmission, wherein the indication that the MsgA payload was unsuccessfully decoded is provided by a field for RA preamble ID in a MAC subheader; and
based on detecting the indication, commence with step 3 of the 4-step RA by transmitting, to the network node, a Msg3 on UL resources configured in the UL grant, wherein the Msg3 comprises the MsgA payload.