Telefonaktiebolaget LM Ericsson (publ)
PDN AND PDU SESSION TYPE MAPPING AND CAPABILITY DISCOVERY

Abstract:

Access and Mobility Management Function, AMF, adapted for taking part in handover from a 5G system, 5GS, to an Evolved Packet System, EPS, an interface being provided between a Mobility Management Entity, MME, of the EPS and the AMF. The AMF being adapted for signalling with a Session Management Function and Packet Data Network, PDN, Gateway-Control plane, SMF and PGW-C, entity, the AMF being adapted for--providing a request (102d, 2-2a) to the SMF and PGW-C entity to provide a Session Management, SM, Context that also includes mapped EPS, Bearer Contexts (102d); --wherein for PDU Sessions with PDU Session type Ethernet or Unstructured, providing (102e1) a capability of a target MME of supporting a Non-IP PDN type to the PGW-C and SMF entity in the request (2-2a) to allow the PGW-C and SMF entity to determine whether or not to include an EPS Bearer context for non-IP PDN type; --transmitting the request (2-2a) to the SMF.