5G Reference Signal Delay Compensation for TSN Synchronization
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Solution Overview
Problem
The 5G system struggles to provide the necessary synchronization accuracy required by Time Sensitive Networking (TSN) services, as existing methods do not account for transmission delay compensation between terminal devices and network devices, hindering accurate synchronization.
Innovation Solution
A method and apparatus for compensating transmission delay by configuring reference signals, such as uplink and downlink reference signals, between terminal and network devices to determine and compensate for signal transmission delays, ensuring accurate synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If transmission delay compensation is not implemented, then the system operation is simple, but the synchronization accuracy does not meet TSN service requirements
Solution Approach 1:
The patent introduces reference signals as an intermediary mechanism to measure and compensate transmission delays. The network device sends downlink reference signals to the terminal device, which measures the received signal and reports back. Based on this feedback, the network device calculates transmission delay and applies compensation to downlink data transmission, thereby achieving high synchronization accuracy without complex bidirectional coordination protocols.
Solution Approach 2:
The patent implements a feedback mechanism where the terminal device measures the downlink reference signal and reports measurement results to the network device. The network device uses this feedback to determine transmission delay and apply appropriate compensation. This closed-loop feedback system enables accurate delay compensation while maintaining relatively simple system operation.
2Measurement precision
If reference signal configuration is implemented for delay compensation, then synchronization accuracy improves, but signal configuration complexity increases
Solution Approach 1:
The patent reuses existing downlink reference signals (such as CSI-RS or SS/PBCH blocks) for the dual purpose of channel estimation and transmission delay measurement. By making these existing signals serve multiple functions, the patent avoids introducing separate dedicated reference signals, thereby improving synchronization accuracy without significantly increasing signal configuration complexity.
3Reliability
If transmission delay compensation is implemented, then TSN service synchronization requirements are met, but processing overhead increases
Solution Approach 1:
The patent performs transmission delay measurement and compensation in advance before actual TSN service data transmission. The network device measures delay using reference signals, calculates compensation values, and applies them to subsequent downlink data transmission. This preliminary action ensures that when TSN services are transmitted, the synchronization is already optimized, meeting reliability requirements without adding processing overhead during critical service transmission.
Data Source
AI summary
Provided are a transmission delay compensation method and apparatus, a device, and a storage medium. The method includes that: a network device sends signal configuration information to a terminal device, and the terminal device receives signal configuration information from the network device. The signal configuration information is used for configuring a reference signal for transmission delay compensation between the terminal device and the network device, and the reference signal includes an uplink reference signal and/or a downlink reference signal.