METHOD AND USER EQUIPMENT FOR REPORTING UE CAPABILITY FOR SMALL DATA TRANSMISSION

1 . A method performed by a user equipment (UE) for reporting UE capability for small data transmission (SDT), the method comprising:

receiving, from a base station (BS), a UE capability enquiry message;

setting, in response to receiving the UE capability enquiry message, a content of a UE capability information message to indicate whether the UE supports random access (RA)-SDT; and

transmitting, to the BS, the UE capability information message after setting the content of the UE capability information message.

2 . The method of claim 1 , wherein the RA-SDT is used for a transmission of data or signaling over allowed radio bearers via an RA procedure, while the UE is in a radio resource control (RRC)_INACTIVE state.

3 . The method of claim 1 , further comprising:

setting the content of the UE capability information message to further indicate whether the UE supports configured grant (CG)-SDT.

4 . The method of claim 3 , wherein the CG-SDT is used for a transmission of data or signaling over allowed radio bearers via a CG type 1, while the UE is in a radio resource control (RRC)_INACTIVE state.

5 . The method of claim 3 , further comprising:

setting the content of the UE capability information message to further indicate whether the UE supports up to a maximum number of active CG configurations.

6 . The method of claim 5 , further comprising:

setting the content of the UE capability information message to further indicate the UE supports multiple CG-SDT configurations in a case that the UE supports the CG-SDT and the UE supports up to the maximum number of the active CG configurations.

7 . The method of claim 1 , further comprising:

submitting, by a radio resource control (RRC) layer of the UE, the UE capability information message to a lower layer of the UE for transmission.

8 . A user equipment (UE) for reporting UE capability for small data transmission (SDT), the UE comprising:

one or more non-transitory computer-readable media having computer-executable instructions embodied thereon; and

at least one processor coupled to the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions to:

receive, from a base station (BS), a UE capability enquiry message,

set, in response to receiving the UE capability enquiry message, a content of a UE capability information message to indicate whether the UE supports random access (RA)-SDT, and

transmit, to the BS, the UE capability information message after setting the content of the UE capability information message.

9 . The UE of claim 8 , wherein the RA-SDT is used for a transmission of data or signaling over allowed radio bearers via an RA procedure, while the UE is in a radio resource control (RRC)_INACTIVE state.

10 . The UE of claim 8 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

set the content of the UE capability information message to further indicate whether the UE supports configured grant (CG)-SDT.

11 . The UE of claim 10 , wherein the CG-SDT is used for a transmission of data or signaling over allowed radio bearers via CG type 1, while the UE is in a radio resource control (RRC)_INACTIVE state.

12 . The UE of claim 10 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

set the content of the UE capability information message to further indicate whether the UE supports up to a maximum number of active CG configurations.

13 . The UE of claim 12 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

set the content of the UE capability information message to indicate the UE supports multiple CG-SDT configurations in a case that the UE supports the CG-SDT and the UE supports up to the maximum number of the active CG configurations.

14 . The UE of claim 8 , wherein the at least one processor is further configured to execute the computer-executable instructions to:

submit, by a radio resource control (RRC) layer of the UE, the UE capability information message to a lower layer of the UE for transmission.