US 12,452,911 B2
Bandwidth part switching methods and apparatus for wireless devices
Reza Kalbasi, San Diego, CA (US)
Assigned to TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed by TOYOTA JIDOSHA KABUSHIKI KAISHA, Toyota (JP)
Filed on Nov. 13, 2024, as Appl. No. 18/946,702.
Application 18/946,702 is a continuation of application No. 18/281,141, previously published as PCT/US2022/019343, filed on Mar. 8, 2022.
Claims priority of provisional application 63/158,943, filed on Mar. 10, 2021.
Prior Publication US 2025/0071806 A1, Feb. 27, 2025
Int. Cl. H04W 74/00 (2009.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)
CPC H04W 74/006 (2013.01) [H04W 74/0808 (2013.01); H04W 74/0833 (2013.01); H04W 74/0836 (2024.01); H04W 74/0838 (2024.01)] 5 Claims
OG exemplary drawing
 
1. A method of data transmission, comprising:
receiving, by a user equipment (UE), from a base station, a configuration message indicating one or more frequency bands for transmitting a radio signal;
determining, by the UE, a first bandwidth part (BWP) corresponding to a first frequency band from among the one or more frequency bands;
performing, by the UE, a first listen before talk (LBT) operation on the first frequency band;
switching, by the UE, the first BWP corresponding to the first frequency band to a second BWP corresponding to a second frequency band different from the first frequency band in a case that the first LBT operation fails, the second BWP having a first portion for transmitting a random access preamble;
initiating, by the UE, a random access procedure in the second BWP in a case that the first BWP is switched to the second BWP, the random access procedure including transmitting, by the UE, to the base station, the random access preamble in the first portion of the second BWP; and
performing, by the UE, a second LBT operation prior to transmitting on the second BWP in which the random access procedure has been completed,
wherein the step of the switching, by the UE, the first BWP corresponding to the first frequency band to the second BWP corresponding to the second frequency band different from the first frequency band in a case that the first LBT operation fails comprises a step of determining whether the second BWP corresponding to the second frequency band has the first portion for transmitting the random access preamble.