A Method for data arrival reporting is provided. The method includes receiving a RRCRelease, the RRCRelease includes a first information for SDT, determining radio bearers configured for SDT based on the first information, receiving a SystemInformationBlock1, the SystemInformationBlock1 includes a second information for SDT, monitoring Physical Downlink Control Channel for the first type Common Search Space Set configured by the first search space for Downlink Control Information with Cyclic Redundancy Check scrambled by the first identifier, initiating a SDT based on the first information and the second information, monitoring PDCCH for a first type CSS configured by a second search space for DCI with CRC scrambled by a second identifier, transmitting a UEAssistanceInformation if data mapped to bearers not configured for SDT becomes available, monitoring PDCCH for a second type CSS configured by a third search space for DCI with CRC scrambled by a third identifier.