PDU Session Priority Parameter for Admission Control
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Solution Overview
Problem
In 5G networks, when the maximum number of PDU sessions a User Equipment (UE) can establish is reached, there is no standardized method to select which existing PDU session to release to accommodate a new PDU session, leading to heterogeneous and potentially undesired user experiences and lacking operator control over PDU session priorities.
Innovation Solution
The introduction of a PDU session priority parameter allows for the evaluation and determination of whether to establish a new PDU session based on this parameter when the maximum number of PDU sessions is reached, ensuring that higher priority sessions are maintained and lower priority sessions are released if necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the maximum number of PDU sessions per UE is enforced, then network resource management is improved, but the ability to accommodate high-priority sessions is worsened
Solution Approach 1:
The patent changes the parameter of PDU session management by introducing a priority parameter that modifies the rigid maximum session limit. When a high-priority session is requested, the system evaluates the priority level and can release lower-priority sessions to accommodate the new session, effectively changing the static quantity constraint into a dynamic parameter-based management system.
2Ease of operation
If UE implementation-specific selection is used for releasing PDU sessions, then device autonomy is improved, but user experience consistency is worsened
Solution Approach 1:
The patent introduces a standardized priority parameter that transforms the UE implementation-specific behavior into a parameter-driven decision process. The UE autonomously selects sessions to release based on the priority parameter values, ensuring consistent user experience across different devices while maintaining UE autonomy through standardized rules.
Solution Approach 2:
The system implements feedback through the priority parameter that guides the UE's session selection process. The UE receives priority information and uses it to make informed decisions about which sessions to release, creating a feedback loop that ensures consistent behavior across different UEs while maintaining device autonomy.
3Device complexity
If no priority parameter is provided, then system complexity is reduced, but operator control capability is worsened
Solution Approach 1:
The patent adds a priority parameter to enhance operator control capability without significantly increasing system complexity. The priority parameter provides operators with the ability to control session establishment and release decisions, allowing them to prioritize critical services while maintaining a relatively simple session management framework.
Data Source
AI summary
A method, apparatus and computer program product are provided herein to provide a Protocol Data Unit (PDU) session priority parameter. For example, a method is provided that comprises identifying a need in a user equipment (UE) for establishing a new protocol data unit PDU session. The method also includes evaluating whether to establish a new PDU session and determining whether to establish a new PDU session based on a PDU session priority parameter when a maximum number of PDU sessions the UE can establish in the network is reached.