AMF Interworking Indication for PDU Session Resource Allocation
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Solution Overview
Problem
In communication networks, the current mechanisms for PDU session procedures between interworking networks, such as 5GS and EPS, often result in resource allocation without considering whether the PDU session supports interworking, leading to inefficient resource utilization and potential connectivity issues due to network capability or restriction limitations.
Innovation Solution
A method where a first node determines whether a PDU session supports interworking with a second network and sends this indication to a second node managing the PDU session, ensuring that resources are only allocated if interworking is supported, thereby improving resource allocation efficiency and avoiding unnecessary allocations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a second node supporting interworking is selected for managing the PDU session, then interworking capability is available, but resources may be allocated unnecessarily when the PDU session does not support interworking
Solution Approach 1:
The first node determines whether the PDU session supports interworking before the second node allocates resources. This preliminary determination prevents unnecessary resource allocation by the second node when interworking is not supported, while maintaining the adaptability to allocate resources when needed.
Solution Approach 2:
The first node sends an indication to the second node about whether the PDU session supports interworking. This feedback mechanism allows the second node to adjust its resource allocation behavior accordingly, avoiding waste while maintaining interworking capability when required.
2Ease of operation
If resources are allocated without checking interworking support, then resource allocation is simplified, but resource utilization efficiency deteriorates
Solution Approach 1:
The determination of interworking support is performed in advance by the first node before resource allocation by the second node. This preliminary check maintains operational simplicity for the second node while improving resource utilization efficiency by preventing unnecessary allocations.
3Productivity
If the first node determines and sends interworking indication, then resource allocation efficiency is improved, but signaling overhead increases
Solution Approach 1:
The interworking support indication is extracted as a separate, dedicated signal from the first node to the second node. This extraction allows for efficient resource allocation based on the indication while keeping the signaling overhead minimal and manageable.
Data Source
AI summary
A method at an Access and mobility Management Function (AMF) for facilitating a Protocol Data Unit (PDU) session procedure for a User Equipment (UE) in a 5th Generation System (5GS) network, wherein the 5GS network is interworking with an Evolved Packet System (EPS) network, and a Packet Data Network Gateway Control plane Function+Session Management Function (PGW-C+SMF) supporting the interworking is selected for managing the PDU session. The method comprises determining whether the PDU session supports interworking with the EPS network, based on at least one of a capability of the UE and a subscription data of the UE; and sending an indication which indicates whether the PDU session supports interworking with the EPS network to the PGW-C+SMF.