Synchronization Signal Block Indication via Segmented Signaling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In the New Radio (NR) system, terminals inaccurately determine the time-frequency resource position for data reception due to the lack of consideration of control resource sets (CORESET) in synchronization signal block indication, leading to incorrect measurement and link monitoring results, and increased power consumption.
Innovation Solution
The base station sends synchronization indication information through both system information and Radio Resource Control (RRC) signaling, using a full bitmap to accurately indicate which synchronization signal blocks are sent, especially in carrier aggregation scenarios, to ensure terminals correctly identify the synchronization signal blocks and perform rate-matching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the base station sends synchronization signal blocks and uses system information to indicate which SSBs are sent, then the terminal can perform synchronization and system information acquisition, but the terminal may inaccurately determine the time-frequency resource position for data reception when CORESET is multiplexed
Solution Approach 1:
The indication information is segmented into two parts: first indication information sent through system information (RMSI) and second indication information sent through RRC signaling. This segmentation allows the terminal to first obtain basic SSB indication from system information, then refine the determination using additional second indication information that specifically addresses CORESET multiplexing scenarios, thereby improving time-frequency resource position determination accuracy
Solution Approach 2:
The patent introduces an intermediary mechanism (the second indication information through RRC signaling) that mediates between the system information indication and the actual CORESET multiplexing configuration. This intermediary provides the terminal with precise information about which SSBs are actually transmitted and how CORESET is multiplexed, enabling accurate time-frequency resource position determination even in complex multiplexing scenarios
2Ease of operation
If the terminal determines time-frequency resource position based on synchronization signal block indication information without considering CORESET multiplexing, then the processing is simple, but the terminal may inaccurately determine the time-frequency resource position for data reception
Solution Approach 1:
The indication process is segmented into two stages: first, the terminal processes system information to obtain initial SSB indication (simple processing); second, the terminal processes RRC signaling to obtain refined indication information about CORESET multiplexing (enhanced processing). This segmentation maintains processing simplicity for basic cases while enabling high precision when needed
Solution Approach 2:
The patent applies partial action by providing the second indication information only when necessary (in CORESET multiplexing scenarios). The terminal performs additional processing only when the situation requires it, rather than always performing complex analysis. This maintains ease of operation for simple cases while ensuring measurement precision when CORESET multiplexing is present
3Reliability
If the base station transmits all possible synchronization signal blocks in a burst set, then complete coverage is achieved, but the indication information becomes larger and more complex
Solution Approach 1:
The indication information is segmented into two parts: a first part through system information that provides basic SSB indication, and a second part through RRC signaling that provides refined indication. This segmentation allows the system to maintain complete synchronization coverage while distributing the indication burden across two separate channels, reducing the complexity burden on any single indication message
Solution Approach 2:
The system transmits only the necessary SSBs rather than all possible SSBs in the burst set. The first indication information indicates which SSBs are transmitted, and the second indication information provides additional refinement only when needed. This partial action approach maintains reliable synchronization coverage while reducing indication information complexity by avoiding transmission of unnecessary SSBs
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A method and a device of processing synchronization indication information and a method and a device of indicating a synchronization signal block are provided. The method of processing synchronization indication information is applied to a terminal and includes receiving a synchronization signal block sent by a base station; receiving synchronization indication information sent by the base station, the synchronization indication information being used to indicate the synchronization signal block sent by the base station; determining RMSI CORESET, UE-specific CORESET and an other CORESET; determining a time-frequency resource position for data reception according to the multiplexing information and the synchronization indication information.