5G PDU Session Management via AMF Registration Request

The UE performs preliminary identification of PDU sessions requiring UP resources and includes this information in the registration request message before the network processes the registration. This allows the network to proactively allocate resources without waiting for separate session establishment procedures, resolving the contradiction by preparing information in advance that enables reliable resource configuration while keeping the message structure manageable through pre-computation at the UE side.

The patent combines multiple PDU session resource requests into a single batched signaling interaction between AMF and SMF. Instead of establishing UP resources for each PDU session through separate signaling exchanges, the AMF processes multiple PDU session indications from the UE in one consolidated request to the SMF, which then allocates resources for all indicated sessions. This merging approach ensures reliable resource allocation for all sessions while minimizing signaling overhead by reducing the number of separate message exchanges.

The UE performs preliminary identification and indication of PDU sessions requiring UP resources in the registration request message itself, rather than waiting for network polling or subsequent separate indications. This preliminary action at the UE side enables the network to immediately proceed with resource allocation upon receiving the registration request, thus maintaining network resource efficiency by avoiding unnecessary allocations while simultaneously reducing the time required to establish user plane connectivity, as the network receives all necessary information upfront without waiting for additional signaling rounds.