Session context conversion

An apparatus comprising:

• at least one processor;
• and
• at least one memory storing instructions thereon that, when executed by the at least one processor, cause the apparatus to perform at least:
• receiving, while being served by a first system and during a protocol data unit (PDU) session establishment procedure, a PDU SESSION ESTABLISHMENT ACCEPT message including an access point name aggregate maximum bit rate value of a second system;
• and
• upon an inter-system change from the first system to the second system, mapping the access point name aggregate maximum bit rate value of the second system received while being served by the first system to an access point name aggregate maximum bit rate value of a session management context for the second system.

An apparatus comprising:

• at least one processor;
• and
• at least one memory storing instructions thereon that, when executed by the at least one processor, cause the apparatus to perform at least:
• receiving, from a first system comprising a fifth generation core network (5G CN), a PROTOCOL DATA UNIT (PDU) SESSION ESTABLISHMENT ACCEPT message comprising an access point name aggregate maximum bit rate (APN-AMBR) value for use in a second system comprising a fourth generation (4G) Evolved Packet System (EPS);
• storing the APN-AMBR value as part of a PDU session context, the APN-AMBR value being associated with a quality of service (QoS) flow;
• in an instance in which the QoS flow is deleted prior to an inter-system change from the first system to the second system, removing the APN-AMBR value;
• and
• in an instance in which the QoS flow is not deleted and there is an inter-system change from the first system to the second system while the APN-AMBR value is stored as part of the PDU session context, mapping the APN-AMBR value received from the first system to an APN-AMBR value of an EPS bearer context in the second system.