Non-Serving Cell Reference Signal Alignment for Inter-Cell Mobility
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Solution Overview
Problem
Current cellular communication systems face challenges in detecting reference signals from neighbor cells with different Point A frequencies, hindering inter-cell multi-Transmission/Reception Point (TRP) operations and L1/L2-centric inter-cell mobility.
Innovation Solution
The system configures User Equipment (UE) with Point A information for non-serving cells, allowing it to receive or transmit reference signals by aligning the frequency domain reference points, either by signaling within the serving cell configuration or outside it, ensuring accurate sequence generation and detection across different cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the system uses different Point A frequencies for different cells to support flexible network deployment, then network deployment flexibility is improved, but reference signal detection accuracy deteriorates
Solution Approach 1:
The system performs preliminary action by configuring the UE with Point A frequency offset information before the UE attempts to detect reference signals from non-serving cells. This advance configuration enables the UE to correctly align its frequency reference for sequence generation, thereby maintaining detection accuracy despite different Point A frequencies across cells.
Solution Approach 2:
The Point A frequency offset information acts as an intermediary parameter that mediates between the different Point A frequencies of various cells and the UE's reference signal detection process. By introducing this offset information as an intermediate configuration element, the system enables accurate detection while supporting flexible network deployments with different reference frequencies.
2Measurement precision
If the system configures UE with Point A information for non-serving cells, then reference signal detection accuracy is improved, but device complexity increases
Solution Approach 1:
The Point A offset information configuration mechanism serves multiple functions: it enables accurate reference signal detection from non-serving cells, supports inter-cell multi-TRP operations, and facilitates L1/L2-centric inter-cell mobility. By creating a universal configuration approach that handles multiple functions, the system improves detection accuracy without proportionally increasing complexity.
Solution Approach 2:
The UE uses its existing capability to handle serving cell Point A information and extends it self-service style to handle non-serving cell Point A information. The UE autonomously applies the offset configuration to generate and detect reference signals, leveraging its existing processing mechanisms rather than requiring entirely new complex subsystems.
3Adaptability or versatility
If the system supports inter-cell multi-TRP operations with different Point A frequencies, then system versatility is improved, but sequence generation complexity increases
Solution Approach 1:
The system applies local quality by configuring Point A offset information specifically for non-serving cells where it is needed, rather than uniformly across all cells. This localized approach enables inter-cell multi-TRP operations with different reference frequencies only where required, maintaining simpler operations for cells that don't need the enhanced functionality.
Data Source
AI summary
Systems and methods for handling serving and non-serving cells having different frequency domain reference points for reference signal sequence generation are disclosed. In one embodiment, a method performed by a wireless communication device (WCD) comprises obtaining information about a frequency domain reference point to be used for one or more reference signals on a non-serving cell of the WCD and applying the information about the frequency domain reference point to be used for the one or more reference signals on the non-serving cell of the WCD to receive or transmit one or more reference signals on the non-serving cell of the WCD. In this manner, inter-cell operation is enabled for a UE for cases when a network deployment uses different reference points for reference signal sequence generation for different cells.