US 12,082,235 B2
System and method for random access resource selection
Hung-Chen Chen, Taipei (TW); Chie-Ming Chou, Taipei (TW); Yu-Hsin Cheng, Taipei (TW); and Mei-Ju Shih, Taipei (TW)
Assigned to FG Innovation Company Limited, Tuen Mun (HK)
Filed by FG Innovation Company Limited, Tuen Mun (HK)
Filed on May 23, 2023, as Appl. No. 18/200,783.
Application 18/200,783 is a continuation of application No. 17/469,163, filed on Sep. 8, 2021, abandoned.
Application 17/469,163 is a continuation of application No. 16/153,705, filed on Oct. 6, 2018, granted, now 11,147,078, issued on Oct. 12, 2021.
Claims priority of provisional application 62/568,900, filed on Oct. 6, 2017.
Prior Publication US 2023/0292357 A1, Sep. 14, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/542 (2023.01); H04B 7/00 (2006.01); H04B 7/06 (2006.01); H04L 5/00 (2006.01); H04W 36/00 (2009.01); H04W 48/16 (2009.01); H04W 72/044 (2023.01); H04W 72/23 (2023.01); H04W 74/00 (2009.01); H04W 74/02 (2009.01); H04W 74/04 (2009.01); H04W 74/0833 (2024.01)
CPC H04W 72/542 (2023.01) [H04B 7/00 (2013.01); H04B 7/0695 (2013.01); H04L 5/0048 (2013.01); H04W 36/0077 (2013.01); H04W 72/046 (2013.01); H04W 72/23 (2023.01); H04W 74/006 (2013.01); H04W 74/02 (2013.01); H04W 74/04 (2013.01); H04W 74/085 (2013.01); H04L 5/0023 (2013.01); H04W 48/16 (2013.01); H04W 74/0833 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method of random access resource selection, the method comprising:
transmitting, by a target Base Station (BS), a first Synchronization Signal Block (SSB) to a User Equipment (UE), the first SSB associated with a first contention-free random access resource for the UE to transmit a random access preamble;
transmitting, by the target BS, a second SSB to the UE, the second SSB associated with a contention-based random access resource; and
in a case that a first Synchronization Signal-Reference Signal Received Power (SS-RSRP) of the first SSB is not greater than an SS-RSRP threshold and a second SS-RSRP of the second SSB is greater than the SS-RSRP threshold, receiving, by the target BS, the random access preamble from the UE using the contention-based random access resource, wherein:
when dedicated Radio Resource Control (RRC) signaling, generated by the target BS, indicates the contention-based random access resource, the contention-based random access resource is determined based on the dedicated RRC signaling, and
when the dedicated RRC signaling does not indicate the contention-based random access resource, the contention-based random access resource is determined based on a common random access configuration broadcast by a source BS.