Abstract: A terminal apparatus for communicating with a first terminal apparatus and a second terminal apparatus is responsible to relay communication between the first terminal apparatus and the second terminal apparatus, and transmits, to the second terminal apparatus, a configuration for sidelink reception used for communication with the first terminal apparatus.

Abstract: A terminal apparatus for communicating with a first terminal apparatus and a second terminal apparatus is responsible to relay communication between the first terminal apparatus and the second terminal apparatus. The terminal apparatus measures a sidelink Reference Signal Received Power (SL-RSRP) in each of communication with the first terminal apparatus and communication with the second terminal apparatus, and determines whether the two SL-RSRPs are equal to or greater than a threshold and notifies the first terminal apparatus that the first terminal apparatus and the second terminal apparatus are in proximity in a case that the two SL-RSRPs are determined to be equal to or greater than the threshold, and does not notify the first terminal apparatus that the first terminal apparatus and the second terminal apparatus are in proximity in a case that the two SL-RSRPs are not determined to be equal to or greater than the threshold.

Abstract: A terminal apparatus for communicating with a second terminal apparatus via a first terminal apparatus. The third terminal apparatus receives a sidelink transmission from the second terminal apparatus to the first terminal apparatus, measures a sidelink Reference Signal Received Power (SL-RSRP) from the received sidelink transmission, and determines whether the SL-RSRP is equal to or greater than a threshold, and notifies a higher layer that the second terminal apparatus is in proximity in a case that the SL-RSRP is determined to be equal to or greater than the threshold, and does not notify the higher layer that the second terminal apparatus is in proximity in a case that the SL-RSRP is not determined to be equal to or greater than the threshold.

Abstract: A terminal apparatus for communicating with a second terminal apparatus via a first terminal apparatus is responsible to relay communication between the first terminal apparatus and the second terminal apparatus. The terminal apparatus receives a sidelink transmission including first Sidelink Control Information (SCI) and a sidelink transmission including second SCI corresponding to the first SCI, measures a Sidelink Reference Signal Received Power (SL-RSRP) from the sidelink transmission including the first SCI, and associates the measured SL-RSRP with an identifier included in the second SCI, and notifies a higher layer of the measured SL-RSRP and the identifier, the identifier indicating a transmission source of the sidelink transmission including the first SCI.

Abstract: A terminal apparatus for communicating with a first terminal apparatus and a second terminal apparatus is responsible to relay communication between the first terminal apparatus and the second terminal apparatus, and includes a processing unit and a transmitter, and the processing unit transmits a sidelink reception configuration for the first terminal apparatus to the second terminal apparatus.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on an indirect path in a case that radio link failure is detected on the direct path, and transmits information indicating that the radio link failure has occurred on the direct path via the signaling radio bearer in a case that the signaling radio bearer is determined to be configured on the indirect path.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on the direct path in a case that radio link failure is detected on the indirect path and a signaling radio bearer is not configured with a split bearer, and transmits, via the signaling radio bearer, information indicating that the radio link failure has occurred on the indirect path in a case that the signaling radio bearer is determined to be configured on the direct path.

Abstract: A terminal apparatus for communicating with a base station apparatus by using a direct path and an indirect path determines whether a signaling radio bearer is configured on the indirect path in a case that radio link failure is detected on the direct path and the signaling radio bearer is not configured with a split bearer, and a transmitter transmits information indicating that the radio link failure has occurred on the direct path via a sidelink signaling radio bearer configured between the terminal apparatus and the relay terminal apparatus in a case that the signaling radio bearer is determined to not be configured on the indirect path.

Abstract: A terminal apparatus determines whether information (first information) indicating whether a state of a secondary cell group is to be changed based on scg-State is included in the RRC signaling, in a case that the first information is not included in the RRC signaling, the state of the secondary cell group is changed based on whether the scg-State is included in the RRC signaling, and in a case that the first information is included in the RRC signaling, the state of the secondary cell group is not changed based on whether the scg-State is included in the RRC signaling.

Abstract: A terminal apparatus determines whether a candidate special cell (SpCell) associated with a conditional reconfiguration information element of an entry included in an entry list is identical to a special cell (SpCell) currently configured for the terminal apparatus, and does not cause an execution condition to be evaluated, the execution condition being included in the entry including the conditional reconfiguration information element of which the associated candidate SpCell is identical to the SpCell currently configured for the terminal apparatus.

Abstract: A terminal apparatus determines whether to delete all entries included in an entry list held by the terminal apparatus in a case that an RRC connection reconfiguration is performed, deletes all entries included in the entry list in a case that it is determined to delete all entries included in the entry list, and does not delete one or more entries included in the entry list in a case that it is determined not to delete all entries included in the entry list.