Methods and apparatuses for setting up pdu session in distributed nas connection for next generation network

A radio access network (RAN) node comprising:

• a transceiver;
• and
• a processor, wherein:
• the transceiver is configured to receive a first registration request from a wireless transmit/receive unit (WTRU), wherein the first registration request comprises a requested network slice;
• the transceiver is further configured to send a second registration request, wherein the second registration request comprises information indicating the requested network slice;
• the transceiver is further configured to receive a first registration response, wherein the first registration response comprises information indicating allowed network slice information;
• the transceiver is further configured to send a second registration response, wherein the second registration response comprises allowed network slice information;
• the transceiver is further configured to receive a first protocol data unit (PDU) session setup response, wherein the first PDU session setup response comprises quality of service (QoS) flow and QoS parameter information associated with an allowed network slice;
• the processor is configured to set up a user plane tunnel between the RAN node and a gateway associated to a default PDU session;
• and
• the transceiver is further configured to send a second PDU session setup response to the WTRU, wherein the second PDU session setup response comprises information regarding assigned QoS flows for a default data name network (DNN) for the allowed network slice.