A wireless transmit/receive unit (WTRU) may receive, at a radio resource control (RRC) component from a non-access stratum (NAS) component, an extended service request (ESR). The ESR may indicate a low priority for the WTRU and the ESR may be related to a high priority application. The WTRU may transmit, to a wireless network, a RRC connection request with an establishment cause of mobile-originated (MO) data based on the ESR.