Compressed Mode Gap Configurations for Flexible Bandwidth Inter-Frequency Measurements
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Solution Overview
Problem
Wireless communications systems face challenges in making inter-frequency measurements between normal bandwidth and flexible bandwidth cells due to differences in coherent and non-coherent lengths, leading to inaccurate measurements and performance degradation.
Innovation Solution
The implementation of compressed mode gap configurations and power boosting on control channels to accommodate reduced coherent and non-coherent lengths, along with signaling optimized parameters for both normal and flexible bandwidth cells, enables efficient inter-frequency measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If compressed mode gap configurations are used to enable inter-frequency measurements on flexible bandwidth cells, then measurement capability is improved, but measurement precision deteriorates due to reduced coherent and non-coherent lengths
Solution Approach 1:
The patent changes the coherent length and non-coherent length parameters from their standard values to reduced values optimized for flexible bandwidth cells. This allows the system to adapt measurement parameters to different cell types, enabling inter-frequency measurements while maintaining optimal performance for each bandwidth configuration.
Solution Approach 2:
The patent creates a universal measurement framework that can handle both normal bandwidth cells and flexible bandwidth cells. By defining cell search parameters and compressed mode gap configurations that work across different bandwidth types, the system achieves multi-functionality without requiring separate measurement procedures for each cell type.
2Productivity
If coherent length and non-coherent length are reduced for flexible bandwidth cell search, then search efficiency is improved, but measurement reliability deteriorates
Solution Approach 1:
The patent optimizes coherent length and non-coherent length parameters specifically for flexible bandwidth cell search operations. By adjusting these parameters to match the characteristics of flexible bandwidth cells, the system achieves efficient cell search while maintaining reliable measurements through parameter optimization rather than simple reduction.
3Measurement precision
If power is increased on control channels to compensate for coherent length reduction, then measurement precision is improved, but energy consumption increases
Solution Approach 1:
The patent changes the power levels on control channels (P-SCH, S-SCH, CPICH) to compensate for the effects of reduced coherent length. By adjusting these power parameters, the system maintains measurement precision while using the minimum necessary power increase, optimizing the trade-off between measurement accuracy and energy consumption.
Data Source
AI summary
Methods, systems, and devices are provided that may address problems to enabling a user equipment (UE) in connected mode on a normal bandwidth cell to make inter-frequency measurements on another normal bandwidth cell and a flexible bandwidth cell. Some embodiment utilize a set of compressed mode gap configurations for measuring both normal bandwidth and flexible bandwidth inter-frequency cells with the following modification for flexible bandwidth cells: reducing the coherent length used by the UE; using the same cell search parameters at the UE but modifying the compressed mode gap parameters to accommodate both normal bandwidth and flexible bandwidth cell search; and/or maintaining the compressed mode gap parameters but reducing the search window size during cell search coherent accumulation. Some embodiments may configure separate compressed mode measurements configuration for normal bandwidth and flexible bandwidth measurements.