US 12,256,427 B2
Communication control method and user equipment
Masato Fujishiro, Yokohama (JP)
Assigned to KYOCERA Corporation, Kyoto (JP)
Filed by KYOCERA Corporation, Kyoto (JP)
Filed on Nov. 10, 2021, as Appl. No. 17/454,436.
Application 17/454,436 is a continuation of application No. PCT/JP2020/019341, filed on May 14, 2020.
Claims priority of application No. 2019-093196 (JP), filed on May 16, 2019.
Prior Publication US 2022/0070926 A1, Mar. 3, 2022
Int. Cl. H04W 16/14 (2009.01); H04W 28/04 (2009.01); H04W 74/0808 (2024.01); H04W 74/0833 (2024.01); H04W 76/18 (2018.01); H04W 84/02 (2009.01); H04W 88/02 (2009.01); H04W 88/08 (2009.01); H04W 92/02 (2009.01); H04W 92/10 (2009.01)
CPC H04W 74/0808 (2013.01) [H04W 16/14 (2013.01); H04W 28/04 (2013.01); H04W 74/0841 (2013.01); H04W 76/18 (2018.02); H04W 84/02 (2013.01); H04W 88/02 (2013.01); H04W 88/08 (2013.01); H04W 92/02 (2013.01); H04W 92/10 (2013.01)] 2 Claims
OG exemplary drawing
 
1. A communication control method performed in a wireless communication device, the communication control method comprising:
when a random access procedure is performed for a base station operated in an unlicensed band in which Listen Before Talk (LBT) before transmission is required, transmitting a message to the base station and then receiving a response to the message from the base station;
during an n-th (n≥1) random access procedure, transmitting the message to the base station on transmission occasions determined by a parameter and attempting to receive the response to the message after the transmitting; and
in response to a failure occurring during the n-th (n≥1) random access procedure, increasing, according to a fixed value defined by a communication specification, the parameter used to determine transmission occasions in an (n+1)-th random access procedure.