Radio Access Network Control Plane Session Endpoint Rerouting
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Solution Overview
Problem
In mobile communication networks, efficient session management between user equipment (UE) and common control plane functions is challenging, particularly when an attach request is rerouted from one common control plane function to another, leading to signaling delays and inefficiencies in 5G communication systems.
Innovation Solution
A method where the radio access network establishes a control plane communication with a first endpoint and forwards the UE's connection request to a first common control plane function, then sets the second endpoint to a second common control plane function, allowing direct communication and updating existing sessions without creating new ones, thereby optimizing the management of radio access network-core network interface control plane sessions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the radio access network creates new control plane sessions when rerouting attach requests from one common control plane function to another, then the dedicated common control plane function can communicate with the radio access network, but signaling delays increase and session management efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-establishing control plane sessions between the radio access network and common control plane functions before rerouting is needed. When rerouting occurs, the system updates existing sessions rather than creating new ones, eliminating the time-consuming session establishment process and reducing signaling delays while maintaining communication reliability
Solution Approach 2:
The patent implements dynamics by making control plane sessions updateable and reusable. Instead of static one-to-one mappings, the system allows session endpoints to be dynamically changed through update procedures, enabling flexible rerouting between different common control plane functions while maintaining efficient communication
2Adaptability or versatility
If the radio access network maintains multiple control plane sessions for different common control plane functions, then routing flexibility improves, but device complexity and session management overhead increase
Solution Approach 1:
The patent applies universality by designing control plane sessions that can serve multiple common control plane functions. A single control plane session can be updated to point to different common control plane functions as needed, eliminating the need for separate dedicated sessions for each function and reducing session management complexity while maintaining routing flexibility
Solution Approach 2:
The patent uses an intermediary approach where the radio access network maintains control plane sessions with common control plane functions through a standardized interface. The system mediates between the radio access network and specific common control plane functions, allowing flexible routing decisions without increasing the complexity of session management at the radio access network side
Data Source
AI summary
According to one embodiment, a method for establishing a connection of a mobile terminal to a mobile radio communication network is described comprising a radio access network of a mobile radio communication network receiving a connection request from a mobile terminal, the radio access network establishing a control plane communication having as a first endpoint the radio access network, the radio access network forwarding the mobile terminal's connection request to a first common control plane function via the control plane communication, the radio access network receiving a message indicating that the second endpoint of the control plane communication should be set to the second common control plane function and the radio access network setting the second endpoint of the control plane communication to the second common control plane function.