Network Slice Access Barring for Overload Management
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Solution Overview
Problem
Advanced wireless networks, such as 5G, lack the ability to integrate network slicing with access barring mechanisms, preventing them from effectively managing network overload by blocking specific types of mobile terminal access to certain network slices, which are crucial for maintaining Quality of Service and preventing network overload.
Innovation Solution
The implementation of Slice Barring Control (SBC) that evaluates network slice conditions and broadcasts access barring information to mobile terminals, allowing them to access alternative slices when certain slices are overloaded, thereby protecting critical network resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If unified access control is applied to bar mobile terminals from accessing the network under high load conditions, then network overload is prevented, but the ability to differentiate access control by network slice is lost
Solution Approach 1:
The patent segments the unified access control mechanism into slice-specific access control. Instead of applying a single access barring policy to all network access, the system divides access control by network slice, allowing different barring configurations for different slices. This enables the network to prevent overload in critical slices while allowing access to non-critical slices, thus resolving the contradiction between preventing network overload and maintaining slice-specific access control capability.
2Productivity
If network slicing is implemented to provide multiple logical networks on shared infrastructure, then network efficiency and QoS are improved, but the integration with access barring mechanisms is lost
Solution Approach 1:
The patent applies local quality by configuring access barring parameters specific to each network slice. Each slice can have its own access barring configuration (slice barring information) that is independently optimized for its QoS requirements and load conditions. This allows the system to maintain high network efficiency through slicing while integrating access barring mechanisms at the local slice level, resolving the contradiction between network efficiency and mechanism integration complexity.
3Reliability
If access barring information is broadcast to mobile terminals, then access control is enforced, but the ability to direct terminals to alternative slices is prevented
Solution Approach 1:
The patent implements feedback by providing slice barring information to mobile terminals that includes guidance on alternative slices. When a slice is barred, the terminal receives feedback information indicating which alternative slices it can access. This feedback mechanism enables the system to enforce access control while simultaneously guiding terminals to alternative slices, thus resolving the contradiction between access control enforcement and alternative slice redirection capability.
Data Source
AI summary
A system may obtain information that indicates when a plurality of network slices are overloaded; generate a message that indicates which of the network slices are barred from access by wireless mobile terminals based on the information; and broadcast the message over a downlink wireless signal to a cell serviced by the system.