Network Slice Policy Control for Overflow Session Access
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Solution Overview
Problem
Existing network slice management systems fail to efficiently utilize resources when terminals or sessions are restricted due to exceeding maximum limits, leading to resource waste and economic losses, without providing a solution for dynamic policy and charging rule control.
Innovation Solution
A method and apparatus for slice control that includes session management and policy control network elements to dynamically manage network slice overflow states by sending overflow indications and subscription requests, allowing terminals or sessions to access network slices in overflow conditions, and updating policy control information in real-time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the network slice restricts terminal registration and session establishment when the quantity of registered terminals and sessions exceed maximum limits, then the network slice maintains service quality within capacity, but network resources in areas with idle capacity are wasted
Solution Approach 1:
The network slice is segmented into multiple areas, each with independent resource pools and access control. The session management network element determines the overflow state per area rather than for the entire network slice, allowing localized access decisions that prevent resource waste in areas with idle capacity while maintaining service quality in areas near capacity limits
Solution Approach 2:
The system dynamically adjusts access control policies based on real-time resource status. When an area transitions from normal state to overflow state, the network element sends an overflow indication to the policy control network element, which then dynamically updates policy control information to allow or restrict access accordingly, optimizing resource utilization while maintaining service quality
2Loss of energy
If the network slice allows additional user access when resources are available, then network resource utilization improves, but policy and charging rule control becomes complex
Solution Approach 1:
The policy control network element acts as an intermediary between the session management network element and the charging system. It receives overflow indications, determines appropriate policy control information, and manages charging rules dynamically. This intermediary approach simplifies the overall system by centralizing complex policy decisions while enabling flexible resource allocation based on real-time conditions
Data Source
AI summary
A slice control method and apparatus are provided. The method includes: a policy control network element receives, from a slice access control network element, slice access status information of a network slice, the slice access status information comprises information indicating a network slice traffic bandwidth of the network slice; determines, based on the current slice access status information of the network slice, that the network slice traffic bandwidth exceeds a corresponding maximum value allowed by configuration; generates, in response to the determination, first session policy control information for a first session in the network slice; and sends the first session policy control information to a session management network element corresponding to the first session, the first session policy control information being for policy control on the first session.