Groupcast Synchronization Using Group Identification to Reduce Decoding Load
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Solution Overview
Problem
In wireless communication systems, particularly 5G or NR systems, terminals face challenges in efficiently decoding synchronization signals and system information from multiple groups, leading to increased decoding load and unnecessary signal reception.
Innovation Solution
A synchronization method for groupcast communication where terminals detect synchronization signals using group identification information, allowing them to receive system information only from the intended group, reducing unnecessary decoding and signal reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals decode synchronization signals from multiple groups, then signal reception coverage is improved, but decoding load increases
Solution Approach 1:
The patent divides the synchronization signal decoding process into group-specific segments by introducing group identification information. Terminals are assigned to specific groups, and each group has its own synchronization signal with unique identification markers. This segmentation allows terminals to decode only signals relevant to their assigned group rather than attempting to decode all group signals, thereby reducing the decoding load while maintaining reliable signal reception within the designated group.
2Loss of information
If terminals receive system information from all groups, then information completeness is improved, but unnecessary signal reception increases
Solution Approach 1:
The patent applies local quality by customizing the system information transmission to match the specific needs of each group. Each group receives system information tailored to its characteristics and requirements, rather than all groups receiving the same comprehensive information. This is achieved through group-specific system information blocks that contain only the necessary information for each group's operations, eliminating unnecessary signal reception for terminals not belonging to the transmitting group while ensuring information completeness for the target group.
3Measurement precision
If group identification information is added to synchronization signals, then signal targeting accuracy is improved, but signal structure complexity increases
Solution Approach 1:
The patent implements partial action by incorporating group identification information only in specific portions of the synchronization signal structure where it is most effective for targeting, rather than adding comprehensive identification data throughout the entire signal. The group identification information is strategically placed in key locations within the synchronization signal block, providing sufficient targeting accuracy without unnecessarily complicating the overall signal structure. This partial approach adds just enough identification capability to achieve accurate signal targeting while minimizing the increase in signal structure complexity.
Data Source
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AI summary
Provided are a synchronization method and device for groupcast, and a synchronization method of a terminal for groupcast in a wireless communication system includes: detecting a synchronization signal transmitted by a leader terminal in a group by using group identification information; and receiving system information of the group transmitted by the leader terminal.