Acquiring CORESET Time-Frequency Location via PBCH in 5G RMSI
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Solution Overview
Problem
In 5G wireless communication systems, there is a challenge in allocating a time-frequency resource location for the common control resource set (CORESET) of remaining system information (RMSI), as the physical broadcast channel (PBCH) can only carry limited information, necessitating a method to determine this location using time-domain and frequency-domain information.
Innovation Solution
A method and device for acquiring and indicating the time-frequency resource location of the CORESET of RMSI, involving the reception of synchronization signals, determination of synchronization signal blocks, and extraction of time-domain and frequency-domain information from the PBCH to determine the window and physical resource blocks, allowing blind detection to identify the resource location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the PBCH carries time-frequency information of CORESET for RMSI, then the UE can acquire the resource location of CORESET, but the PBCH capacity is limited and cannot carry all system information
Solution Approach 1:
The system information is segmented into two parts: critical information is carried by PBCH, while the remaining system information (RMSI) is carried by PDSCH. The PBCH carries only the necessary time-frequency resource location information of the CORESET, which enables the UE to acquire RMSI without overloading the PBCH capacity.
2Device complexity
If the PBCH carries limited information only, then the PBCH capacity constraint is satisfied, but the UE cannot acquire complete system information including CORESET location
Solution Approach 1:
The PBCH carries preliminary information (time-domain and frequency-domain resource location information of CORESET) that enables the UE to subsequently acquire the complete RMSI. This preliminary action of providing resource location information allows the UE to find and decode the PDSCH carrying RMSI without requiring the PBCH to carry all system information directly.
3Measurement precision
If blind detection is performed over the entire bandwidth to find CORESET, then the UE can locate CORESET, but the time and computational resources are excessively consumed
Solution Approach 1:
Instead of performing blind detection over the entire bandwidth, the UE performs blind detection only within the specific time window and frequency range indicated by the time-domain and frequency-domain information carried in the PBCH. This local search approach maintains detection accuracy while significantly reducing the time and computational resources required.
4Adaptability or versatility
If the time-frequency resource location of CORESET is not pre-indicated, then the system flexibility is maintained, but the UE cannot efficiently locate and acquire RMSI
Solution Approach 1:
The system uses parameter changes by carrying variable time-domain and frequency-domain information in the PBCH that indicates the CORESET resource location. This allows the system to maintain flexibility in allocating CORESET resources while enabling efficient UE acquisition through the indicated parameters, resolving the contradiction between system flexibility and acquisition efficiency.
Data Source
AI summary
A method for acquiring a time-frequency resource location of a CORESET of RMSI includes: receiving a synchronization signal sent by a base station, and determining a synchronization signal block corresponding to the synchronization signal; acquiring a physical broadcast channel PBCH of the synchronization signal block, where the PBCH carries time-domain information and frequency-domain information corresponding to the CORESET of the RMSI; and acquiring, according to the time-domain information and the frequency-domain information corresponding to the CORESET of the RMSI, the time-frequency resource location of the CORESET of a corresponding RMSI. As such, a UE may acquire the time-frequency resource location of the CORESET of the corresponding RMSI, which has a simple implementation manner.