5G Network Function Control Transfer for Signaling Latency Reduction
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Solution Overview
Problem
In 5G communication systems, the large number of signalings between physically independent network nodes (NFs) leads to significant delays during signaling processing associated with user equipment (UE), which cannot be effectively mitigated by existing technologies.
Innovation Solution
A control function transfer technology that loads a predetermined control function from one network node into another node closer to the UE, reducing the number of signalings by transferring and processing control functions between NFs, thereby minimizing latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control functions are distributed across physically independent network nodes, then system reliability and fault isolation are improved, but signaling delay increases due to multiple inter-node communications
Solution Approach 1:
The patent segments control functions into modular network functions (NFs) that can be independently deployed and managed. Each NF performs a specific control function (e.g., authentication, policy control, session management) and can be selectively loaded onto different network nodes based on service requirements, thus maintaining system reliability through functional separation while reducing signaling delay through optimized function placement.
Solution Approach 2:
The patent introduces a network function repository (NRF) as an intermediary that manages the registration, discovery, and selection of network functions. The NRF maintains information about available NFs and their capabilities, enabling efficient matching between service requirements and appropriate NF instances, thereby reducing the time needed to locate and communicate with relevant control functions across the distributed network.
2Device complexity
If control functions are centralized in single network nodes, then signaling processing is simplified, but system scalability and fault tolerance deteriorate
Solution Approach 1:
The patent designs network functions with universal interfaces and standardized protocols that enable the same NF to be deployed across multiple network nodes. This multi-functionality allows control functions to be replicated and distributed throughout the network, improving scalability and fault tolerance while maintaining consistent signaling processing through standardized function interfaces and behaviors.
Solution Approach 2:
The patent implements dynamic function placement and load balancing mechanisms that allow control functions to be flexibly allocated across network nodes based on current traffic conditions, resource availability, and service requirements. This dynamic approach enables the system to scale adaptively while maintaining simplified signaling processing through automated function selection and placement optimization.
Data Source
AI summary
Disclosed is a control function transfer technology that moves/loads a control function, contained in a network node (NF), into another NF, so that signalings among respective NFs which occur during signaling processing associated with a UE may be reduced and a delay in signaling processing with respect to the UE may be reduced.