Synchronization Signal Block Index Determination via DMRS Sequence
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently determining the index of a synchronization signal block in 5G systems, particularly in scenarios with high spectrum efficiency and massive connectivity, which affects decoding performance and signaling overhead.
Innovation Solution
A method and apparatus for receiving a synchronization signal block in a wireless communication system, where the index is determined using a demodulation reference signal (DMRS) and physical broadcasting channel (PBCH), considering the sequence of the DMRS and the number of synchronization signal block candidates, with bits received via DMRS and PBCH to identify the index.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the index of synchronization signal block is determined using only PBCH payload, then signaling overhead is reduced, but decoding performance deteriorates
Solution Approach 1:
The index information is segmented and distributed across multiple channels: DMRS carries part of the index information through its sequence, while PBCH payload carries the remaining index information. This segmentation allows the system to achieve reliable decoding performance through distributed redundancy while avoiding excessive signaling overhead in any single channel.
Solution Approach 2:
DMRS acts as an intermediary carrier that provides partial index information and aids in the decoding process. By using DMRS as an intermediary, the system can improve decoding performance without requiring all index information to be transmitted through PBCH alone, thus reducing the signaling overhead burden on the PBCH channel.
2Reliability
If more bits are transmitted via PBCH payload for index determination, then decoding performance improves, but signaling overhead increases
Solution Approach 1:
The total index information (6 bits) is segmented into two parts: 3 bits carried by DMRS sequence and 3 bits carried by PBCH payload. This segmentation distributes the signaling load across multiple channels, improving decoding performance through redundancy while preventing any single channel from becoming overloaded with signaling overhead.
Solution Approach 2:
The system changes the parameter of information distribution by utilizing both DMRS sequence properties and PBCH payload content to carry index information. This parameter change allows flexible allocation of bits between different channels, optimizing the balance between decoding performance and signaling overhead based on channel characteristics.
Data Source
AI summary
The present invention discloses a method for a terminal to receive a synchronization signal in a wireless communication system. Particularly, the method includes the steps of receiving a synchronization block including a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a physical broadcasting channel (PBCH) and receiving a DMRS (demodulation reference signal) via resource region in which the PBCH is received. In this case, an index of the synchronization block can be determined in consideration of a sequence of the DMRS.