RAN Intelligent Controller VoNR Mobility Optimization
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Solution Overview
Problem
Voice over New Radio (VoNR) in 5G networks is challenging due to its sensitivity to radio frequency conditions and network load/interference, leading to difficulties in optimizing voice calls compared to data traffic, which impacts user experience.
Innovation Solution
Implementing an intelligent 5G VoNR mobility management capability within a Radio Access Network (RAN) intelligent controller that proactively selects and moves User Equipment (UE) to the most suitable cells based on RAN node characteristics and dynamic conditions, using an automatic neighbor relationship (ANR) and slicing capabilities to enhance mobility management and reduce dropped calls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mobility management is used in 5G networks, then network complexity is reduced, but voice call reliability deteriorates due to sensitivity to radio frequency conditions and network load
Solution Approach 1:
The system performs preliminary actions by proactively selecting and moving User Equipment to the most suitable cells before voice quality deteriorates. The RAN intelligent controller anticipates potential issues with radio frequency conditions and network load, initiating mobility management actions in advance to maintain voice call reliability.
Solution Approach 2:
The system implements feedback mechanisms where the RAN intelligent controller continuously monitors radio frequency conditions and network load, using this information to dynamically adjust mobility management decisions. This closed-loop approach ensures voice calls are routed through optimal cells based on real-time network conditions.
2Reliability
If proactive cell selection and mobility management is implemented, then voice call reliability improves, but network control complexity increases
Solution Approach 1:
The RAN intelligent controller acts as an intermediary between the network and User Equipment, centralizing mobility management functions. This mediator consolidates complex control logic in a dedicated component, simplifying the overall network architecture while enabling proactive voice optimization through automatic neighbor relationships and slicing capabilities.
3Reliability
If dynamic mobility management based on real-time conditions is used, then voice quality optimizes, but processing time and computational resources increase
Solution Approach 1:
The system performs preliminary cell selection and prepares mobility management decisions in advance based on predicted network conditions. By anticipating future states of radio frequency conditions and network load, the system reduces real-time processing requirements and enables faster mobility decisions when needed.
Data Source
AI summary
Automatic neighbor relationships (ANR) and voice over new radio (VoNR) microservices can be implemented within a radio access network intelligent controller (RIC), which receives load information from network nodes and user equipment measurements from user equipment. The RIC can create and maintain real-time load information and leverage slicing knowledge of neighbor cells during mobility to direct the user equipment to various network slices. Thus, an enhanced radio access network (RAN) neighbor relationship that utilizes slicing information and VoNR preferences based on current and historical data can provide slice level RAN neighbor visibility on top of physical ANR relationships to enable enhancements for mobility management optimization for VoNR functionality.