Method and apparatus for transmitting a message of a short message service and the additional services

In LTE (long term evolution) network, via an evolved packet system via the LTE control plane (EPS) mobility management (EMM), a method for enabling realizing a short message service (SMS) and supplementary services (SS) and apparatus will be described. In embodiments, the radio resource control (RRC) connection signaling radio bearer (SRB) is to carry the SMS and SS via the LTE control plane between a wireless transmit receive unit (WTRU) and a mobility management entity (MME) They are used to. EMM interfaces and primitives are defined for the action of the LTE via LTE control plane media to SMS and SS entities for enabling realize SMS and SS services. SMS and SS messages EMM uplink (UL) non-access stratum (NAS) message format for messages conveying SMS and SS for transmitting the transport and downlink (DL) NAS transport message are also disclosed.