Always-on PDU Session Management Reducing System Overhead
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Solution Overview
Problem
In 5G communication systems, always-on PDU sessions are repeatedly deactivated and activated, leading to increased system overhead due to the network side not distinguishing them from regular sessions, resulting in unnecessary resource wastage and user experience degradation.
Innovation Solution
Implementing an always-on PDU session management method where the session management function determines and records the always-on attribute of PDU sessions, preventing unnecessary deactivation and enabling controlled resource management, including setting no inactive time period and performing session switching based on the session's always-on attribute.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the network side manages PDU sessions using normal session management rules, then regular session resource allocation is achieved, but always-on sessions are unnecessarily deactivated causing increased system overhead
Solution Approach 1:
The patent segments PDU session management into two distinct modes: normal session management and always-on session management. By introducing a specific attribute to identify always-on sessions, the system applies different management rules to different session types, preventing unnecessary deactivation of always-on sessions while maintaining efficient resource allocation for regular sessions.
Solution Approach 2:
The patent changes the management parameters for always-on sessions by setting the inactive time period to infinity or a very large value, effectively preventing deactivation based on inactivity. This parameter modification allows always-on sessions to maintain user plane resources continuously, eliminating the repeated deactivation/activation cycle that increases system overhead.
2Reliability
If user plane resources are continuously maintained for always-on sessions, then user experience is improved with no service interruption, but system resource consumption increases
Solution Approach 1:
The patent implements dynamic resource management for always-on sessions by allowing the network side to flexibly adjust resource allocation based on actual network conditions and user behavior patterns. While always-on sessions maintain higher resource availability for service continuity, the system can dynamically scale or release resources when not in use, optimizing the balance between reliability and resource consumption.
3Loss of energy
If the network side deactivates PDU sessions based on inactivity triggers, then resource wastage is prevented for regular sessions, but always-on sessions experience unnecessary deactivation and re-establishment
Solution Approach 1:
The patent applies preliminary action by pre-configuring always-on sessions with special attributes and extended inactive time periods before any deactivation can occur. This preliminary configuration ensures that always-on sessions are exempt from normal inactivity-based deactivation, preventing the time loss associated with repeated re-establishment while still allowing regular sessions to be deactivated for resource optimization.
Data Source
AI summary
Embodiments of the present invention relate to the technical field of communications, and particularly relate to an always-on PDU session management method and device for reducing system overhead and improving user experience. The method provided in the embodiments of the present invention comprise: a session management function (SMF) determining that an attribute of a PDU session is an always-on PDU session; the SMF recording the attribute of the PDU session in a session management context; and the SMF managing the PDU session according to the attribute of the PDU session recorded in the session management context.