RAN Paging Message CAG Access Control
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Solution Overview
Problem
Current wireless communication systems, particularly in 4G and 5G networks, face challenges in efficiently managing access and mobility for user equipment (UE) across different access networks, including non-3GPP access, which affects network slicing and quality of service (QoS) due to limitations in paging message handling and network function interactions.
Innovation Solution
The implementation of a communication system where base stations receive and send paging messages with specific parameters indicating access permissions to non-closed access group (CAG) cells, enabling enhanced registration management and connection management across 4G/5G systems, including network slicing, through coordinated interactions between access and mobility management functions and user plane functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations send RAN paging messages to all cells regardless of CAG access permissions, then paging coverage is ensured, but network resources are wasted and access control is compromised
Solution Approach 1:
The patent applies preliminary action by including CAG access permission parameters in the paging message before transmission. This allows receiving base stations to pre-determine whether to forward the paging message based on the wireless device's CAG cell access permissions, avoiding unnecessary transmissions and saving network resources while ensuring proper paging coverage.
2Measurement precision
If base stations include CAG access parameters in paging messages, then access control precision is improved, but message complexity increases
Solution Approach 1:
The patent applies local quality by adding CAG access parameters specifically to paging messages that require enhanced access control, rather than modifying all message types. This targeted approach improves access control precision for relevant scenarios while minimizing the impact on overall system message complexity.
3Reliability
If paging messages are forwarded across multiple base stations, then paging reachability is improved, but latency increases
Solution Approach 1:
The patent reduces paging latency by performing preliminary determination of CAG cell access permissions at the source base station before forwarding the paging message. This allows receiving base stations to quickly decide whether to forward the message based on pre-included parameters, reducing unnecessary forwarding delays while maintaining paging reachability.
Data Source
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AI summary
A first base station receives, from a core network node, a message for a wireless device in a radio resource control (RRC) inactive state. In response to receiving the message, the first base station sends a first radio access network (RAN) paging message to a second base station. The first RAN paging message comprises: a list of one or more closed access group (CAG) identifiers of the wireless device; and a parameter indicating whether the wireless device is allowed to access a non-CAG cell.