Terminal Device SSB Frequency Position Determination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication systems, particularly in unlicensed spectra, determining the frequency domain position of a Control Resource Set (CORESET) associated with SSB on an asynchronous raster frequency is challenging due to the limited indication capability of existing systems, which cannot accurately determine the position of CORESET for SSBs at asynchronous raster frequencies.
Innovation Solution
A wireless communication method and terminal device that detect a first type of SSB at an asynchronous raster frequency and determine the frequency domain position of the CORESET of Remaining Minimum System Information (RMSI) associated with the SSB by using additional SSBs sent on a synchronous raster, allowing for the calculation of a reference frequency domain position and offset to determine the target frequency domain position of the CORESET.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the system uses existing indication methods to determine CORESET position, then the indication capability is maintained, but the frequency domain position of CORESET for SSB on asynchronous raster cannot be accurately determined
Solution Approach 1:
The patent segments the frequency domain position determination into multiple components: a reference frequency domain position derived from synchronous raster SSB and an offset value. This segmentation allows the system to handle asynchronous raster SSB by combining a reliable reference (from synchronous raster) with a corrective offset, thereby achieving accurate position determination without requiring direct indication for each asynchronous case.
Solution Approach 2:
The patent introduces an intermediary approach by using the synchronous raster SSB as a reference point to determine the frequency domain position of asynchronous raster SSB's CORESET. Instead of directly indicating the position for asynchronous raster, the system uses the synchronous raster SSB as an intermediate reference, calculating the position through an offset from this reference, thus resolving the limitation of existing indication methods.
2Measurement precision
If additional SSBs are sent on synchronous raster to enable position calculation, then the frequency domain position can be determined, but the system complexity increases
Solution Approach 1:
The patent makes the synchronous raster SSB serve multiple functions: it acts as both a synchronization signal and a reference for determining the frequency domain position of asynchronous raster SSB's CORESET. This multi-functionality reduces system complexity by reusing existing synchronous raster SSB resources rather than introducing entirely new reference signals or mechanisms.
Solution Approach 2:
The patent performs preliminary action by pre-establishing the synchronous raster SSB as a reference before needing to determine asynchronous raster CORESET positions. The reference frequency domain position is prepared in advance from the synchronous raster SSB, allowing quick and accurate determination of asynchronous positions without complex real-time calculations or additional signaling overhead.
Data Source
AI summary
Implementations of the present disclosure relate to a wireless communication method and a terminal device. The method includes: detecting, by a terminal device, a first type of Synchronous Signal Block (SSB) at a frequency on an asynchronous raster; determining, by the terminal device, a frequency domain position of a Control Resource Set (CORESET) of Remaining Minimum System Information (RMSI) associated with the first type of SSB based on the first type of SSB.