RMSI Reception Offset Calculation for Non-Raster Synchronization Signals
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Solution Overview
Problem
In 5G wireless communication systems, user equipment (UE) face challenges in receiving remaining minimum system information (RMSI) from neighboring cells, especially when the synchronization signal and physical broadcast channel block are not located on a synchronization raster entry, leading to difficulties in determining the correct frequency location for control resource sets.
Innovation Solution
A method for a UE to detect a synchronization signal and physical broadcast channel block, and calculate an offset between the control resource set for TypeO-PDCCH and the synchronization signal/PBCH block by summing a first offset configured by the master information block and a second offset based on the frequency difference, allowing the UE to monitor the TypeO-PDCCH even if the frequency location does not correspond to a synchronization raster entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE uses conventional methods to detect synchronization signals and receive RMSI, then the UE can successfully receive RMSI from cells with synchronization signals located on synchronization raster entries, but the UE fails to determine the correct frequency location for control resource sets when synchronization signals are not on synchronization raster entries
Solution Approach 1:
The network pre-configures multiple candidate frequency locations for control resource sets and provides indication information in advance to guide the UE's detection process, allowing the UE to efficiently identify the correct frequency location without exhaustive searching
Solution Approach 2:
The system introduces dynamic indication mechanisms that allow the network to flexibly point to different frequency locations based on actual deployment scenarios, enabling the UE to adapt to both raster and non-raster synchronization signal locations through unified procedures
2Measurement precision
If the UE performs exhaustive frequency search to find control resource sets, then the UE can potentially find the correct frequency location, but the complexity and time consumption increase significantly
Solution Approach 1:
The network pre-configures multiple candidate frequency locations for control resource sets and provides indication information in advance to guide the UE's detection process, allowing the UE to efficiently identify the correct frequency location without exhaustive searching
Solution Approach 2:
The indication information acts as an intermediary that bridges the gap between the synchronization signal and the control resource set, providing the UE with directional guidance to the correct frequency location and eliminating the need for blind exhaustive search
3Adaptability or versatility
If the system supports both raster and non-raster synchronization signal locations, then the system becomes more versatile, but the device complexity increases due to multiple detection procedures
Solution Approach 1:
The patent designs a universal frequency location determination mechanism that can handle both raster and non-raster synchronization signal scenarios through a unified procedure, where the network provides indication information that adapts to different cell types without requiring separate detection algorithms
Solution Approach 2:
The system introduces dynamic indication mechanisms that allow the network to flexibly point to different frequency locations based on actual deployment scenarios, enabling the UE to adapt to both raster and non-raster synchronization signal locations through unified procedures
Data Source
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AI summary
A method and apparatus of a UE in a wireless communication system supporting a shared spectrum channel access is provided. The method and apparatus comprises: detecting a synchronization signal and physical broadcast channel block, SS/PBCH block; and determining a offset between control resource set, CORESET, for Type0-PDCCH and the SS/PBCH block as a sum of a first offset and a second offset in case that a frequency location of the detected SS/PBCH block does not corresponds to a frequency location of a synchronization raster entry, wherein the first offset is configured by a master information block, MIB, in the detected SS/PBCH block, and wherein the second offset is determined based on frequency difference between the frequency location of the detected SS/PBCH block and the frequency location of the synchronization raster entry.