Dynamic LBO PDU Session Switching for Edge Computing
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Solution Overview
Problem
Existing technologies do not provide a method for switching a PDU session to Local Breakout (LBO) mode in roaming situations, which is necessary for efficient edge computing and dynamic network management.
Innovation Solution
A method is provided that involves the User Equipment (UE) sending a PDU session establishment request message to the Session Management Function (SMF), receiving an acceptance message, and then sending a PDU session release command message with cause information. Based on this cause information, the UE can dynamically switch to an LBO mode PDU session.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a PDU session is established in home-routed mode during roaming, then the UE can access the home network, but the edge computing efficiency and network flexibility are reduced
Solution Approach 1:
The patent implements dynamic switching between home-routed mode and local breakout mode based on real-time network conditions and roaming status. The SMF can change the PDU session mode from static home-routed to dynamic local breakout when roaming conditions change, enabling the system to adapt to different network scenarios and optimize edge computing efficiency accordingly
Solution Approach 2:
The patent changes the operational parameters of the PDU session by introducing a mode indicator that can take different values (home-routed mode or local breakout mode). This parameter change allows the session to switch between different routing behaviors, enabling flexible adaptation to roaming conditions and optimizing network performance for edge computing scenarios
2Productivity
If the network manually switches PDU session to LBO mode, then edge computing can be optimized, but the switching process complexity and signaling overhead increase
Solution Approach 1:
The patent enables the UE to autonomously detect its roaming status and trigger mode switching without requiring manual network intervention. The UE monitors its own state and initiates the switching process by sending modification requests to the SMF, reducing network complexity while optimizing edge computing performance
Solution Approach 2:
The patent implements a feedback mechanism where the UE reports its roaming status to the network, and the network responds with appropriate mode configuration. This feedback loop enables automatic adaptation to roaming conditions, simplifying the switching process while maintaining optimal edge computing performance
3Adaptability or versatility
If PDU session switching is implemented, then network flexibility is improved, but the signaling messages and protocol complexity increase
Solution Approach 1:
The patent reuses existing PDU session modification procedures and messaging mechanisms for mode switching, rather than creating entirely new protocols. The same modification request and response messages handle both normal session changes and LBO mode switching, reducing protocol complexity while maintaining network flexibility
Solution Approach 2:
The patent prepares the switching mechanism in advance by pre-configuring the SMF and UE with the necessary capabilities and parameters. The mode switching infrastructure is established beforehand, allowing rapid activation when needed without requiring complex real-time protocol negotiations, thus reducing overall protocol complexity
Data Source
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AI summary
A disclosure of the present specification provides a method for performing communication by a UDM. The method may comprise the steps of: receiving a registration message related to a PDU session of a UE from an SMF; receiving a CM update request message from the SMF; and transmitting, to an AMF, a notification message including LBO roaming information indicating that LBO roaming is allowed for a DNN or S-NSSAI.