Using relative importance in association with a pdu session

A first network node, the first network node comprising:

• a processor configured to:
• detect a triggering event;
• send, to a first wireless transmit receive unit (WTRU), a first message, wherein the first message comprises a first protocol data unit (PDU) set assignment rule corresponding to a quality of service (QoS) flow, and wherein the first PDU set assignment rule indicates a first PDU set base value and a discard factor;
• send, to a second network node, a second message, wherein the second message comprises a second PDU set assignment rule associated with the QoS flow, and wherein the second PDU set assignment rule indicates a second PDU set base value;
• and
• send, to a third network node, a third message, wherein the third message comprises a QoS profile, and wherein the QoS profile indicates the discard factor, and wherein the discard factor corresponds to the QoS flow.

A method for a first network node, the method comprising:

• detecting a triggering event;
• sending, to a first wireless transmit receive unit (WTRU), a first message, wherein the first message comprises a first protocol data unit (PDU) set assignment rule, and wherein the first PDU set assignment rule corresponds to a quality of service (QoS) flow, and wherein the first PDU set assignment rule indicates a first PDU set base value and a discard factor;
• sending, to a second network node, a second message, wherein the second message comprises a second PDU set assignment rule, and wherein the second PDU set assignment is associated with the QoS flow, and wherein the second PDU set assignment rule indicates a second PDU set base value;
• and
• sending, to a third network node, a third message, wherein the third message comprises a QoS profile, and wherein the QoS profile indicates the discard factor, and wherein the discard factor corresponds to the QoS flow.