5GNR LTE Data Split Control via BLER Feedback
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Solution Overview
Problem
Wireless access nodes do not effectively use Block Error Rate (BLER) to dynamically control the splits in dual-connectivity mode when serving wireless user devices over Fifth Generation New Radio (5GNR) and Long Term Evolution (LTE), leading to inefficient wireless transmission.
Innovation Solution
A baseband unit in the wireless access node splits user data into 5GNR and LTE portions based on the difference in BLER between the two networks, dynamically adjusting the split to optimize error correction and improve spectral efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If static or simple dynamic splits are used in dual-connectivity mode, then device complexity is reduced, but transmission reliability and spectral efficiency deteriorate due to ineffective BLER utilization
Solution Approach 1:
The patent implements feedback mechanisms where the wireless access node continuously monitors BLER metrics from both LTE and 5GNR links, and uses this feedback to dynamically adjust the data split ratio. The baseband unit compares BLER values and modifies the split accordingly, creating a closed-loop control system that improves transmission reliability while maintaining manageable complexity through algorithmic automation.
Solution Approach 2:
The patent transitions from static or simple dynamic splits to fully dynamic split control that continuously adapts based on real-time BLER measurements. The split ratio is no longer fixed or slowly changing, but actively adjusted in response to current channel conditions and error rates, allowing the system to optimize performance in varying radio environments.
2Productivity
If dynamic BLER-based split control is implemented, then spectral efficiency and error correction improve, but device complexity and control mechanism complexity increase
Solution Approach 1:
The system implements self-service through automated BLER monitoring and split adjustment algorithms in the baseband unit. The access node autonomously compares BLER metrics from both links and modifies the split ratio without requiring complex external control mechanisms or manual intervention, thereby improving spectral efficiency while keeping the control architecture relatively simple through self-contained decision logic.
Solution Approach 2:
The patent changes the control parameter from fixed or simple dynamic split ratios to BLER-based adaptive split control. By using BLER as the controlling parameter and establishing a direct relationship between error rate measurements and split ratio adjustments, the system achieves improved spectral efficiency through a relatively simple parameter-change mechanism rather than complex multi-variable control.
Data Source
AI summary
A wireless access node simultaneously serves wireless User Equipment (UE) over Fifth Generation New Radio (5GNR) and Long Term Evolution (LTE). A baseband unit splits user data into a 5GNR portion and an LTE portion per a dynamic 5GNR/LTE split. A 5GNR radio wirelessly transfers the 5GNR portion to the wireless UE. An LTE radio wirelessly transfers the LTE portion to the wireless UE. The baseband unit corrects LTE and 5GNR transmission errors and determines a 5GNR Block Error Rate (BLER) and an LTE BLER. The baseband unit modifies the dynamic 5GNR/LTE split based on the difference between the 5GNR BLER and the LTE BLER. The baseband unit splits additional user data into 5GNR and LTE portions per the modified 5GNR/LTE split.