Wireless Signalling Preamble for Multi-TRP Timing Synchronization
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Solution Overview
Problem
Existing wireless communication systems face challenges in managing different channel conditions, particularly at high frequencies, due to varying path delays and power losses across different TRPs, which affect timing and symbol processing, especially in OFDM-based systems.
Innovation Solution
The proposed solution involves improved signalling methods for wireless communication, including a preamble part and a message part, with a repetitive time domain structure, pilot signalling, and adaptive timing adjustments based on received signalling characteristics, to accommodate varying channel conditions and path delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high frequency ranges are used for transmission, then data transmission capacity is improved, but channel conditions become more variable with larger path delay effects
Solution Approach 1:
The signalling message is divided into a preamble part and a message part. The preamble part contains timing information that can be used for synchronization, while the message part contains the actual data. This segmentation allows the receiver to first acquire timing synchronization through the preamble before processing the message, thereby maintaining reliability at high frequencies.
Solution Approach 2:
The preamble part is transmitted before the message part to perform preliminary timing synchronization. This preliminary action enables the receiving radio node to adjust its timing before the actual data transmission, compensating for the larger path delay effects inherent in high frequency ranges.
2Reliability
If different TRPs are utilized for transmission, then coverage and reliability are improved, but timing and pathloss conditions vary significantly
Solution Approach 1:
The preamble part serves multiple functions: it provides timing synchronization, indicates the TRP being used, and prepares the receiver for the upcoming message. This multi-functionality simplifies timing management across different TRPs by consolidating synchronization information in a universal preamble structure that works regardless of which TRP is transmitting.
3Speed
If short time-scales for symbols and prefixes are used at high frequencies, then symbol duration is reduced improving data rate, but path delay effects become significantly larger than prefix times
Solution Approach 1:
Instead of relying solely on the prefix duration for timing synchronization, the invention introduces a new dimension by embedding timing information in the preamble part of the signalling message. This allows timing accuracy to be determined from the preamble rather than being constrained by the short prefix duration, thereby maintaining timing precision even with very short symbol times at high frequencies.
Data Source
AI summary
A method of operating a receiving radio node in a radio access network. The method includes communicating based on received first signalling, the first signalling comprising one or more messages, wherein one or more of the messages have a repetitive time domain structure. The disclosure also pertains to related devices and methods.