AMF Access Preferences for Control Plane Signaling
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Solution Overview
Problem
Current wireless communication systems face complexity in delivering control plane services across multiple radio access technologies (RATs) due to varying network conditions and user equipment (UE) preferences, leading to inefficiencies in signaling management and resource allocation.
Innovation Solution
The implementation of an Access and Mobility Management Function (AMF) that establishes and manages access preferences for control plane services across different RANs, considering network parameters, UE states, and service characteristics to optimize signaling transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If control plane services are delivered across multiple radio access technologies (RATs), then service versatility and network coverage are improved, but system complexity and signaling management difficulty increase
Solution Approach 1:
The patent segments control plane service delivery by separating different RATs (3GPP and non-3GPP accesses) into distinct management paths. The AMF manages 3GPP access services while the SMF manages non-3GPP access services, dividing the complex multi-RAT control plane into manageable segments with specific responsibilities for each access type.
Solution Approach 2:
The patent introduces the SMF as an intermediary function that specifically mediates control plane services for non-3GPP accesses. This intermediary role allows the AMF to focus on 3GPP services while the SMF handles non-3GPP services, reducing the complexity burden on any single function.
2Productivity
If access preferences are established for control plane services, then signaling transmission efficiency is improved, but management overhead and configuration complexity increase
Solution Approach 1:
The patent applies local quality by establishing access preferences specifically for control plane services rather than applying uniform policies to all services. The AMF and SMF independently determine and manage preferences for their respective access types, allowing optimized signaling delivery for control plane while maintaining simplicity through localized management.
3Reliability
If multiple access types are supported for control plane services, then service availability and reliability are improved, but resource allocation complexity and signaling management difficulty increase
Solution Approach 1:
The patent segments resource allocation management by assigning the AMF responsibility for 3GPP access resource allocation and the SMF responsibility for non-3GPP access resource allocation. This segmentation allows independent optimization of resource allocation for each access type, improving reliability while reducing overall complexity through specialized management.
Data Source
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AI summary
Methods, systems, and devices are described for wireless communications. A wireless communication system may use access preferences to indicate a preferred access for communicating signaling for a control plane service. In some aspects, an AMF and a UE may establish access preferences for one or more control plane services and communicate signaling for the control plane service based on the established access preferences. In some cases, the UE may transmit modified access preferences for a control plane service to the AMF, and the UE and AMF may communicate signaling for the control plane service based on the modified access preferences. In some aspects, an AMF may also restrict the accesses used by a control plane service. A UE may also request that certain accesses are restricted for use by a control plane service.