Granted Patent B2

US 12,328,732 · App. 16/560,199 · Granted Jun 10, 2025

Inventors: Takeo Ohseki (Fujimino, JP); Kazuhide Toda (Fujimino, JP); Yasuhiro Suegara (Fujimino, JP)

Assignee: KDDI CORPORATION

H04W72/23H04W72/1263H04W72/21

Abstract

Claims (35)

1. A terminal device, comprising:

one or more processors; and

one or more memories that stores a computer-readable instruction for causing, when executed by the one or more processors, the one or more processors to at least:

receive a plurality of scheduling request (SR) settings from a base station, wherein each of the plurality of SR settings corresponds to different combinations of a bandwidth, a time duration, and a periodicity, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device;

select, in a case where data that is to be transmitted to the base station device is generated, one SR setting for use in transmission of the scheduling request to the base station device, from among the plurality of SR settings, wherein the terminal device can select the one SR setting from the plurality of SR settings without receiving from the base station an instruction that designates the one SR setting; and

transmit the scheduling request to the base station device with use of the one SR setting that was selected.

2. The terminal device according to claim 1 , wherein in a case where an uplink grant corresponding to the scheduling request that was transmitted with use of a first SR setting among the plurality of SR settings is not received from the base station device, the computer-readable instruction further causing, when executed by the one or more processors, the one or more processors to at least:

select a second SR setting that is different from the first SR setting from among the plurality of SR settings, and

transmit the scheduling request to the base station device with use of the second SR setting.

3. The terminal device according to claim 2 , wherein the second SR setting is selected if the uplink grant is not received from the base station device in a case where the scheduling request was transmitted a predetermined number of times or over a predetermined time period with use of the first SR setting.

4. The terminal device according to claim 2 , wherein the time duration corresponding to the first SR setting is shorter than the time duration corresponding to the second SR setting, and the bandwidth corresponding to the first SR setting is wider than the bandwidth corresponding to the second SR setting.

5. The terminal device according to claim 1 , wherein the one SR setting is selected from among the plurality of SR settings based on transmission path loss between the base station device and the terminal device.

6. The terminal device according to claim 1 , wherein the plurality of SR settings is received with use of an RRC message that is transmitted by the base station device for establishment of a connection between the base station device and the terminal device.

7. A base station device, comprising:

one or more processors; and

one or more memories that stores a computer-readable instruction for causing, when executed by the one or more processors, the one or more processors to at least:

determine a plurality of scheduling request (SR) settings that correspond to different combinations of a bandwidth, a time duration, and a periodicity and are to be used by a terminal device to transmit a scheduling request, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device; and

perform a SR configuration for the terminal device by transmitting the plurality of SR settings to the terminal device, wherein the plurality of SR settings enable the terminal device to select one SR setting for use in transmission of the scheduling request from the plurality of SR settings without transmitting by the base station device an instruction that designates the one SR setting.

8. The base station device according to claim 7 , wherein the plurality of SR settings are determined in accordance with a latency requirement of a radio bearer established by the terminal device.

9. The base station device according to claim 7 , wherein the plurality of SR settings are determined based on transmission path loss between the base station device and the terminal device.

10. The base station device according to claim 7 , wherein the plurality of SR settings is transmitted to the terminal device using an RRC message for establishment of a connection between the base station device and the terminal device.

11. A method for controlling a terminal device, comprising:

receiving a plurality of scheduling request (SR) settings from a base station, wherein each of the plurality of SR settings corresponds to different combinations of a bandwidth, a time duration, and a periodicity, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device;

selecting, in a case where data that is to be transmitted to the base station device is generated, one SR setting for use in transmission of the scheduling request to the base station device, from among the plurality of SR settings, wherein the terminal device can select the one SR setting from the plurality of SR settings without receiving from the base station an instruction that designates the one SR setting; and

transmitting the scheduling request to the base station device with use of the one SR setting that was selected.

12. A method for controlling a base station device, comprising:

determining a plurality of scheduling request (SR) settings that correspond to different combinations of a bandwidth, a time duration, and a periodicity and are to be used by a terminal device to transmit a scheduling request, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device; and

performing a SR configuration for the terminal device by transmitting the plurality of SR settings to the terminal device, wherein the plurality of SR settings enable the terminal device to select one SR setting for use in transmission of the scheduling request from the plurality of SR settings without transmitting by the base station device an instruction that designates the one SR setting.

13. A non-transitory computer-readable storage medium that stores a program for causing a computer included in a terminal device to:

receive a plurality of scheduling request (SR) settings from a base station, wherein each of the plurality of SR settings corresponds to different combinations of a bandwidth, a time duration, and a periodicity, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device;

select, in a case where data that is to be transmitted to the base station device is generated, one SR setting for use in transmission of the scheduling request to the base station device, from among the plurality of SR settings, wherein the terminal device can select the one SR setting from the plurality of SR settings without receiving from the base station an instruction that designates the one SR setting; and

transmit the scheduling request to the base station device with use of the one SR setting that was selected.

14. A non-transitory computer-readable storage medium that stores a program for causing a computer included in a base station device to:

determine a plurality of scheduling request (SR) settings that correspond to different combinations of a bandwidth, a time duration, and a periodicity and are to be used by a terminal device to transmit a scheduling request, and each of the plurality of SR settings is capable of being used for transmission of a scheduling request in a cell served by the base station device; and

perform a SR configuration for the terminal device by transmitting the plurality of SR settings to the terminal device, wherein the plurality of SR settings enable the terminal device to select one SR setting for use in transmission of the scheduling request from the plurality of SR settings without transmitting by the base station device an instruction that designates the one SR setting.

Assignments (1)

Priority Claims (1)

Continuity (2)

References Cited (25)