US 12,010,732 B2
Terminal apparatus, base station apparatus, control method, and computer-readable storage medium for executing random access procedure
Takeo Ohseki, Fujimino (JP); Issei Kanno, Fujimino (JP); Yasuhiro Suegara, Fujimino (JP); and Masahito Umehara, Fujimino (JP)
Assigned to KDDI CORPORATION, Tokyo (JP)
Filed by KDDI CORPORATION, Tokyo (JP)
Filed on Aug. 9, 2021, as Appl. No. 17/396,985.
Application 17/396,985 is a continuation of application No. PCT/JP2019/025832, filed on Jun. 28, 2019.
Claims priority of provisional application 62/805,077, filed on Feb. 13, 2019.
Prior Publication US 2021/0368554 A1, Nov. 25, 2021
Int. Cl. H04W 74/0833 (2024.01); H04W 76/10 (2018.01)
CPC H04W 74/0841 (2013.01) [H04W 76/10 (2018.02)] 6 Claims
OG exemplary drawing
 
6. A non-transitory computer-readable storage medium that stores a program for causing a computer provided in a base station apparatus to:
establish a connection with a terminal apparatus via a two-step random access procedure by receiving a first signal including a random access preamble and predetermined information from the terminal apparatus and transmitting a second signal as a reply to the first signal to the terminal apparatus or via a four-step random access procedure; and
when establishing the connection via the two-step random access procedure,
acquire a random access-radio network temporary identifier (RA-RNTI) by adding a predetermined offset value to a value acquired on the basis of a radio resource having been used to transmit the random access preamble with the first signal, and
execute transmission processing of the second signal using the RA- RNTI, and
when establishing the connection via the four-step random access procedure,
acquire a second RA-RNTI on the basis of a radio resource having been used to transmit a random access preamble from the terminal apparatus to the base station apparatus via the four-step random access procedure, and
execute transmission processing of a random access response, which is a reply to the random access preamble, using the second RA-RNTI.