Cell Measurement SSB Window Offset for NTN Power Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In Non-Terrestrial Network (NTN) systems, the large signal transmission delays between User Equipment (UE) and satellite cells result in prolonged SMTC windows, leading to increased power consumption and reduced communication time, affecting user experience.
Innovation Solution
A cell measurement method that adjusts the Synchronization Signal Block (SSB) receiving window for each neighboring cell based on a unique starting time offset, allowing for different measurement windows for different cells, thereby reducing the need for continuous detection and conserving power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single SMTC window is configured for all neighboring cells to compensate for signal transmission delay differences, then all cells can be measured within the same window, but the window duration must be greatly prolonged causing increased UE power consumption
Solution Approach 1:
The patent divides the measurement window into cell-specific segments by configuring separate starting time offsets for different neighboring cells. Each cell has its own time offset relative to the SMTC window start, allowing the UE to receive SSBs from multiple cells with different transmission delays within the same SMTC window without prolonging the overall window duration. This segmentation resolves the contradiction by enabling reliable measurement of all cells while maintaining reasonable power consumption.
Solution Approach 2:
The patent applies local quality by assigning different starting time offsets to different neighboring cells based on their individual signal transmission delays. Instead of using a uniform time offset for all cells, each cell receives a customized offset that compensates for its specific delay characteristics. This allows the SMTC window to be optimized for each cell locally while maintaining a compact overall duration, thus improving measurement reliability without increasing power consumption.
2Reliability
If the SMTC window duration is prolonged to accommodate large transmission delay differences in NTN, then all neighboring cells can be received, but the UE must continuously detect SSBs for a longer period reducing communication time
Solution Approach 1:
By segmenting the measurement approach into cell-specific time offsets within a unified SMTC window, the patent enables the UE to efficiently receive SSBs from multiple cells without extending the total measurement period. The UE can systematically detect SSBs from different cells at their respective optimized times within the same window, maintaining reliable reception while preserving communication time for other operations.
3Device complexity
If a unified measurement window is used for all cells, then the measurement configuration is simplified, but the window must be extended to cover the largest transmission delay difference
Solution Approach 1:
The patent maintains a unified SMTC window structure for simplicity while introducing cell-specific starting time offsets as a segmentation mechanism. This approach keeps the overall measurement configuration manageable with a single window definition, but adds targeted time offset parameters for each cell to optimize the actual reception timing. The result is a balanced configuration that remains relatively simple while avoiding excessive window duration extension.
Solution Approach 2:
The patent introduces starting time offset parameters for different cells as a modification to the basic SMTC window configuration. By changing the time offset parameter for each cell individually, the system can accommodate varying transmission delays without fundamentally altering the unified window structure. This parameter-based approach maintains configuration simplicity while achieving the necessary duration optimization.
Data Source
AI summary
The present disclosure provides a cell measurement method and apparatus, and a device and a storage medium. The method includes: receiving a first measurement configuration, the first measurement configuration including a frequency point to be measured, first configuration information of a first measurement window corresponding to said frequency point, and a whitelist neighbors list, as well as a first starting time offset corresponding to neighbor cells in the whitelist neighbors list; determining a synchronizing signal block (SSB) receiving window corresponding to the neighbor cells in the whitelist neighbors list according to the first configuration information of the first measurement window corresponding to said frequency point and the first starting time offset corresponding to the neighbor cells in the whitelist neighbors list; and measuring each neighbor cell in the whitelist neighbors list based on the SSB receiving window corresponding to the neighbor cells in the whitelist neighbors list.