RAN-to-Core Direct Signaling Without AMF Proxy Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G radio access network architecture faces inefficiencies due to the use of an Access and Mobility Management Function (AMF) as a proxy, causing transmission delays in communication between the radio access network and the core network.
Innovation Solution
Direct communication is established between the radio access network and control plane network functions, bypassing the AMF proxy, by obtaining and utilizing indication information to directly connect with the appropriate control plane network functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the AMF serves as a proxy to shield CP NF connection and signaling procedure, then the radio access network side structure is simpler, but transmission delay increases
Solution Approach 1:
The patent extracts the AMF proxy function from the communication path between radio access network and core network control plane functions. By removing the AMF as an intermediary, the system achieves direct communication between the radio access network device and the CP NF, eliminating the proxy processing delay while maintaining structural simplicity through standardized direct interfaces.
2Loss of time
If direct communication is established between radio access network and CP NF, then transmission delay is reduced, but the radio access network side structure becomes more complex
Solution Approach 1:
The patent implements a universal direct communication interface between the radio access network device and multiple types of core network control plane functions. The radio access network device is designed to communicate directly with different CP NFs (SMF, PCF, LMF, etc.) using standardized protocols, making the system multi-functional without requiring complex proprietary interfaces for each NF type.
Data Source
Figure 1~3
Figure 4~6
Figure 7
AI summary
Embodiments of this application provide a method for communication between a radio access network and a core network and a communication apparatus. The method includes: A first wireless network device obtains first indication information of a first control plane network function serving a terminal device, where the first control plane network function is a network function determined based on a second control plane network function. The first wireless network device communicates with the first control plane network function based on the first indication information. This avoids a delay caused by proxy processing or forwarding of the second control plane network function when the first wireless network device communicates with the first control plane network function via the second control plane network function. Therefore, signaling can be reduced, and communication efficiency can be improved.