NR Bandwidth Part Reallocation Across Asymmetric DSS Networks
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Solution Overview
Problem
Current implementations of asymmetric DSS networks lack flexibility to dynamically adjust shared bandwidth portions based on varying traffic profiles, leading to inefficient resource utilization and interference between LTE and NR users.
Innovation Solution
A method and system to dynamically expand or reduce the bandwidth of LTE and NR based on traffic usage thresholds, allowing for incremental adjustments to optimize resource allocation and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If LTE and NR share a fixed asymmetric bandwidth in DSS, then interference management is simplified, but resource utilization efficiency deteriorates when traffic patterns vary
Solution Approach 1:
The patent implements dynamic bandwidth adjustment where the shared bandwidth portion between LTE and NR is not fixed but can be expanded or reduced based on real-time traffic conditions. The system monitors traffic usage and automatically adjusts the bandwidth allocation, transforming a static configuration into a dynamic one that adapts to varying traffic demands, thereby resolving the contradiction between management simplicity and resource utilization efficiency.
Solution Approach 2:
The system changes the bandwidth parameter dynamically based on traffic conditions. When LTE traffic increases, the shared bandwidth portion can be expanded into underutilized NR bandwidth, and vice versa. This parameter change approach allows the system to optimize resource utilization without fundamentally changing the system architecture, balancing complexity and efficiency.
2Device complexity
If manual configuration of shared bandwidth portion is used, then system complexity is reduced, but adaptability to varying traffic profiles deteriorates
Solution Approach 1:
The system implements self-service through automated bandwidth adjustment mechanisms. The network automatically monitors traffic conditions and adjusts the shared bandwidth portion without requiring manual reconfiguration. This self-service capability enables the system to adapt to varying traffic profiles dynamically while keeping operational complexity low, as the automation handles the adaptability requirements.
Solution Approach 2:
The patent incorporates feedback mechanisms where traffic usage information is continuously monitored and fed back to the bandwidth management system. Based on this feedback, the system automatically adjusts the shared bandwidth allocation. This closed-loop feedback approach provides adaptability to traffic changes without requiring complex manual configuration, resolving the contradiction between simplicity and adaptability.
3Reliability
If NR bandwidth is expanded to accommodate high LTE traffic, then LTE service quality improves, but NR throughput deteriorates due to increased interference
Solution Approach 1:
The system dynamically adjusts the shared bandwidth portion based on real-time traffic conditions rather than using a fixed allocation. When LTE traffic is high, the shared bandwidth can be temporarily expanded, and when NR traffic dominates, it can be reduced. This dynamic approach allows the system to optimize for one technology when needed while minimizing the negative impact on the other, resolving the contradiction between LTE service quality and NR throughput.
Solution Approach 2:
The patent changes the bandwidth allocation parameter dynamically based on traffic demands. The shared bandwidth portion between LTE and NR is adjusted as a variable parameter rather than a fixed value. This allows the system to optimize resource allocation for each technology based on current needs, improving LTE service quality when necessary while minimizing throughput loss for NR through automated parameter adjustment.
4Device complexity
If fixed BWP configuration is used for NR, then device complexity is reduced, but flexibility to off-load NR traffic during high LTE load deteriorates
Solution Approach 1:
The patent implements dynamic BWP configuration where the NR bandwidth parts are not fixed but can be adjusted based on traffic conditions. When LTE load is high, the system can dynamically modify BWP allocations to off-load NR traffic to appropriate BWPs. This dynamic configuration maintains relatively simple device structure while providing the flexibility needed for traffic management, resolving the contradiction between complexity and adaptability.
Data Source
AI summary
System and method are provided for a dynamic radio access technology (RAT) bandwidth adaptation across asymmetric dynamic spectrum sharing (DSS) networks. DSS is implemented for Long Term Evolution (LTE) in 4G and New Radio (NR) in 5G. When the traffic usage for one radio access technology (LTE) exceeds its bandwidth capacity in a bandwidth part that has DSS, the radio network node identifies bandwidth parts that can receive NR users. NR users are moved from the bandwidth part that has DSS to bandwidth parts that are NR only and have the capacity to take NR users.