US 12,408,211 B2
Communication device, communication method, and communication program
Hiroki Matsuda, Tokyo (JP); and Naoki Kusashima, Tokyo (JP)
Assigned to SONY GROUP CORPORATION, Tokyo (JP)
Filed by Sony Group Corporation, Tokyo (JP)
Filed on Apr. 8, 2024, as Appl. No. 18/629,196.
Application 18/629,196 is a continuation of application No. 17/414,324, granted, now 11,979,922, previously published as PCT/JP2019/045759, filed on Nov. 22, 2019.
Claims priority of application No. 2019-002878 (JP), filed on Jan. 10, 2019.
Prior Publication US 2024/0260099 A1, Aug. 1, 2024
Int. Cl. H04W 76/10 (2018.01); H04W 72/23 (2023.01)
CPC H04W 76/10 (2018.02) [H04W 72/23 (2023.01)] 19 Claims
OG exemplary drawing
 
1. A communication device configured to operate as terminal device,
wherein the communication device is configured to change a radio connection state with another communication device that is configured to operate as base station device from an unconnected state to a connected state by performing a predetermined connection procedure, and
wherein the unconnected state is an RRC_INACTIVE state and the connected state is an RRC_CONNECTED state, with RRC meaning radio resource control, and the predetermined connection procedure is a random access procedure,
the communication device comprising:
a transmitter
control circuitry that:
acquires predetermined information, which is information for unconnected transmission for transmitting data to the another communication device in the unconnected state without transitioning to the connected state;
controls the transmitter to transmit the data to the another communication device in the unconnected state based on the predetermined information; and
initiates the transmission of the data to the another communication device in the unconnected state with a transmission over a two-step or four-step Random Access Channel (RACH) resource,
wherein all or part of RACH resources is configured as resources for the transmission of the data in the unconnected state,
wherein the control circuitry is further configured to:
change the radio connection state after the data is transmitted, and
after the data is transmitted:
acquire information related to the change of the radio connection state, and
change the radio connection state from the unconnected state to the connected state, based on the information related to the change of the radio connection state.