Intra-Frequency CSI-RS Measurement via Processing Resource Segmentation
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Solution Overview
Problem
Current wireless communication systems, such as 5G NR, face inaccuracies in intra-frequency CSI-RS measurements due to timing offsets between serving and neighbor cells, which degrade network performance.
Innovation Solution
User equipment (UE) capable of performing intra-frequency CSI-RS measurements without sharing processing resources, such as FFTs with different sampling windows, allows simultaneous data reception and measurement, while UEs without this capability have downlink scheduling restrictions to prioritize CSI-RS measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If UE shares processing resources (FFTs with sampling windows) for simultaneous data reception and CSI-RS measurement, then device complexity is reduced, but measurement precision deteriorates due to timing offsets between serving and neighbor cells
Solution Approach 1:
The patent segments the processing resources by introducing a separate processing engine dedicated to CSI-RS measurements, independent from the data processing engine. This segmentation allows each engine to operate with its own sampling window optimized for its specific function, eliminating the measurement precision deterioration caused by resource sharing while managing device complexity through functional separation.
Solution Approach 2:
The patent implements dynamic sampling window configuration where the measurement processing engine can independently adjust its sampling window based on the timing offsets between serving and neighbor cells. This dynamic adaptation allows the system to maintain measurement precision under varying network conditions without requiring permanent complex resource allocation.
2Productivity
If UE performs simultaneous data reception and CSI-RS measurement on overlapping resources, then productivity is improved, but measurement precision deteriorates due to timing offsets
Solution Approach 1:
By segmenting the processing into separate data processing and measurement processing engines, the system achieves simultaneous operations on overlapping resources without compromising measurement precision. Each engine operates independently with its own optimized sampling window, allowing productivity improvement while maintaining accuracy.
Solution Approach 2:
The patent applies local quality by optimizing each processing engine for its specific function - the data processing engine uses sampling windows optimized for data reception while the measurement processing engine uses sampling windows optimized for CSI-RS measurement. This functional specialization allows simultaneous operation on overlapping resources with both productivity and precision improved.
3Measurement precision
If downlink scheduling is restricted to prioritize CSI-RS measurements, then measurement precision is improved, but productivity deteriorates due to reduced data transmission opportunities
Solution Approach 1:
The patent segments the reception processing into separate data and measurement engines, enabling simultaneous operation on overlapping resources. This eliminates the need for scheduling restrictions, allowing the system to maintain both high measurement precision and data transmission productivity without compromising either function.
Solution Approach 2:
The dynamic sampling window configuration in the measurement processing engine allows the system to adapt to timing offsets without requiring scheduling restrictions. The system can simultaneously perform data reception and CSI-RS measurement with both functions optimized for their respective requirements, improving productivity while maintaining measurement precision.
Data Source
AI summary
Techniques and apparatus for intra-frequency measurement of Layer 3 (L3)-based channel state information reference signals (CSI-RSs) are described. An example method that may be performed by a user equipment (UE) includes transmitting an indication based on a UE capability to simultaneously receive downlink data from a serving cell on one or more first resources and measure one or more CSI-RSs from a target cell on one or more second resources. The one or more first resources at least partially overlap the one or more second resources in a time domain and a frequency domain. The method also includes performing a CSI-RS measurement procedure, based on the UE capability.