Granted Patent B2

US 12,652,150 · App. 17/846,408 · Granted Jun 9, 2026

Inventors: Hsin-Hsi Tsai (Taipei, TW); Heng-Li Chin (Taipei, TW); Mei-Ju Shih (Taipei, TW); Yung-Lan Tseng (Taipei, TW); Ming-Hung Tao (Taipei, TW)

Assignee: SHARP KABUSHIKI KAISHA

H04L5/0098H04W72/0473H04W76/15H04W76/27H04W74/0833H04W74/0836H04W74/0838

Abstract

Claims (32)

1 . A method performed by a User Equipment (UE) for Small Data Transmission (SDT), the method comprising:

receiving, from a Base Station (BS), system information that includes a System Information Block 1 (SIB1);

initiating an SDT procedure in response to determining that a plurality of conditions is satisfied, the plurality of conditions comprising:

the SIB1 including an SDT configuration, and

an SDT-specific Reference Signal Received Power (RSRP) threshold being absent from the SDT configuration;

in response to initiating the SDT procedure, determining whether a serving cell for the SDT procedure is configured with a Supplementary Uplink (SUL) carrier; and

selecting a Normal Uplink (NUL) carrier as an Uplink (UL) carrier for the SDT procedure in response to determining that the serving cell is not configured with the SUL carrier.

2 . The method of claim 1 , wherein the SDT-specific RSRP threshold corresponds to an Information Element (IE) denoted as sdt-RSRP-Threshold.

3 . The method of claim 1 , wherein the SIB1 is determined to include the SDT configuration in a case that the SIB1 includes an Information Element (IE) denoted as sdt-ConfigCommon.

4 . The method of claim 1 , wherein initiating the SDT procedure comprises initiating the SDT procedure while the UE is operating in a Radio Resource Control (RRC) inactive state.

5 . The method of claim 1 , further comprising:

receiving, from the BS, a Random Access (RA) configuration that includes an RSRP threshold different from the SDT-specific RSRP threshold; and

selecting the SUL carrier as the UL carrier for the SDT procedure in response to determining that an RSRP of a downlink (DL) pathloss reference signal is less than the RSRP threshold and the serving cell is configured with the SUL carrier.

6 . The method of claim 5 , wherein the RSRP threshold is determined by an Information Element (IE) denoted as rsrp-ThresholdSSB-SUL.

7 . The method of claim 5 , wherein the RSRP threshold has a same value for all Bandwidth Parts (BWPs) of the serving cell.

8 . A User Equipment (UE) for performing Small Data Transmission (SDT), the UE comprising:

transmission and reception circuitry; and

at least one processor coupled to the transmission and reception circuitry and configured to:

receive, by the transmission and reception circuitry, from a base station (BS), system information that includes a System Information Block 1 (SIB1);

initiate an SDT procedure in response to determining that a plurality of conditions is satisfied, the plurality of conditions comprising:

the SIB1 including an SDT configuration, and

an SDT-specific Reference Signal Received Power (RSRP) threshold being absent from the SDT configuration;

in response to initiating the SDT procedure, determine whether a serving cell for the SDT procedure is configured with a Supplementary Uplink (SUL) carrier; and

select a Normal Uplink (NUL) carrier as an Uplink (UL) carrier for the SDT procedure in response to determining that the serving cell is not configured with the SUL carrier.

9 . The UE of claim 8 , wherein the SDT-specific RSRP threshold corresponds to an Information Element (IE) denoted as sdt-RSRP-Threshold.

10 . The UE of claim 8 , wherein the SIB1 is determined to include the SDT configuration in a case that the SIB1 includes an Information Element (IE) denoted as sdt-ConfigCommon.

11 . The UE of claim 8 , wherein initiating the SDT procedure comprises initiating the SDT procedure while the UE is operating in a Radio Resource Control (RRC) inactive state.

12 . The UE of claim 8 , wherein the at least one processor is further configured to:

receive, by the transmission and reception circuitry, from the BS, a Random Access (RA) configuration that includes an RSRP threshold different from the SDT-specific RSRP threshold; and

select the SUL carrier as the UL carrier for the SDT procedure in response to determining that an RSRP of a downlink (DL) pathloss reference signal is less than the RSRP threshold and the serving cell is configured with the SUL carrier.

13 . The UE of claim 12 , wherein the RSRP threshold is determined by an Information Element (IE) denoted as rsrp-ThresholdSSB-SUL.

14 . The UE of claim 12 , wherein the RSRP threshold has a same value for all Bandwidth Parts (BWPs) of the serving cell.

Assignments (2)

Continuity (2)

References Cited (20)