PDN Connection Management via Network-Triggered Detach
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Solution Overview
Problem
Current mobile communication systems face resource shortages and fail to meet user demands for higher-speed services, particularly due to the lack of methods to manage PDN connections when terminals malfunction, leading to issues with downlink traffic transmission.
Innovation Solution
A method and apparatus that manage PDN connections by monitoring for failures and sending detach request messages with a 'reattach required' type to induce terminals to re-establish connections, ensuring downlink traffic can be transmitted by autonomously recovering PDN connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal autonomously generates PDN connections upon attachment, then the terminal can establish data service connections, but the terminal cannot recover from malfunction states where PDN connections are not generated or are released
Solution Approach 1:
The core network monitors the PDN connection status of terminals and provides feedback when connections are missing or released. When the network detects that a terminal has not generated a PDN connection or has released it, it sends a notification to the terminal, enabling the terminal to re-establish the connection in response to network feedback rather than relying solely on autonomous terminal operation.
Solution Approach 2:
The core network acts as an intermediary between the terminal and the PDN connection management process. Instead of the terminal autonomously managing all connection aspects, the network intervenes by monitoring connection status and triggering re-establishment procedures when malfunctions occur, mediating the connection recovery process.
2Adaptability or versatility
If all PDN connection generation is triggered by the terminal, then the terminal controls connection establishment, but there is no mechanism to trigger PDN generation in the core network when the terminal malfunctions
Solution Approach 1:
The core network performs preliminary monitoring of PDN connection status and prepares to trigger connection re-establishment before downlink traffic transmission failures occur. By continuously monitoring connection status and detecting missing or released connections in advance, the network can initiate recovery procedures proactively rather than reactively when traffic transmission fails.
Solution Approach 2:
The network implements a feedback mechanism where it monitors terminal PDN connection status and sends notifications back to terminals when connections are absent or released. This feedback loop enables the terminal to understand network-detected connection issues and autonomously re-establish connections based on network feedback, ensuring downlink traffic can be transmitted.
3Ease of operation
If the terminal releases PDN connections due to malfunction, then the terminal may stop generating connections, but downlink traffic cannot be transmitted to the terminal
Solution Approach 1:
When a terminal releases a PDN connection due to malfunction, the core network detects this status change and provides feedback to the terminal through a notification message. This feedback mechanism enables the terminal to re-establish the PDN connection in response to network feedback, ensuring service continuity even when the terminal initially releases the connection due to malfunction.
Solution Approach 2:
The core network performs preliminary monitoring of PDN connection status and detects when terminals have released connections before downlink traffic transmission attempts fail. By detecting connection release in advance and triggering re-establishment procedures proactively, the network ensures that connections are restored before service disruption occurs.
Data Source
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AI summary
The present disclosure relates to a method and an apparatus for managing a PDN connection by inducing, by a node, a terminal to autonomously recover a failure situation or detecting the corresponding terminal when the terminal is not capable of generating or maintaining the PDN connection in a wireless communication system and the method of the present disclosure includes: detecting, by a node, a terminal in which a failure occurs in a PDN connection; and transmitting a detach request message to the terminal in which the failure occurs.