RMSI CORESET Period Indication via PBCH Positional Mapping
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Solution Overview
Problem
The challenge in indicating period information of a Common Control Resource Set (CORESET) of Remaining Key System Information (RMSI) in a broadband system is exacerbated by limited bit availability in the Physical Broadcast Channel (PBCH) and the need for synchronized indication across multiple beams, restricting the freedom of indication and increasing complexity.
Innovation Solution
A method and device that add indication information to the PBCH of a Synchronous SSB, including first indication information to specify the positional relationship between the CORESET and SSB half radio frames, and optionally second information for the magnitude relationship between CORESET and SSB periods, allowing efficient indication using minimal bits and facilitating beam scanning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If more bits are used to indicate CORESET period information in PBCH, then indication precision is improved, but PBCH structure complexity increases
Solution Approach 1:
The patent introduces a new dimension for indication by using the time-domain position relationship between SSB and CORESET rather than directly encoding period information. The first indication information indicates the positional relationship (same half radio frame or different half radio frame), and the second indication information indicates the magnitude relationship (period ratio), together determining the CORESET period through dimensional decomposition.
Solution Approach 2:
The indication information is segmented into two parts: first indication information for positional relationship and second indication information for magnitude relationship. This segmentation allows flexible combination of indication bits to represent different period values without requiring a fixed large number of bits for all cases.
2Reliability
If synchronized indication is applied across multiple beams, then indication reliability is improved, but indication flexibility decreases
Solution Approach 1:
The patent applies dynamic indication by allowing the SSB and CORESET to be located in different half radio frames based on beam configuration. The first indication information dynamically indicates whether they are in the same or different half radio frames, enabling flexible adaptation to different beam scenarios while maintaining synchronization requirements.
3Device complexity
If minimal bits are used for indication, then device complexity is reduced, but indication precision deteriorates
Solution Approach 1:
The patent changes the parameters of indication by introducing the time-domain position relationship as an additional indication dimension. Instead of directly encoding the period value, the system encodes the positional relationship and magnitude relationship, which together determine the period. This parameter transformation enables precise period indication with minimal bits.
Data Source
AI summary
A method for indicating period information of a common control resource set (CORESET) of remaining key system information (RMSI), includes: adding indication information to a physical broadcast channel (PBCH) of a synchronous broadcast block (SSB), wherein the indication information includes first indication information, and the first indication information is used for indicating a positional relationship between a half radio frame where a CORESET of RMSI corresponding to the SSB is located and a half radio frame where the SSB is located; and sending, in a beam scanning manner, the SSB carrying the indication information to user equipment (UE).