DMRS Transmission Pattern Adaptation for High-Mobility Channel Estimation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing communication systems lack flexibility in transmitting Demodulation Reference Signals (DMRS), particularly for terminals with high mobility, leading to reduced accuracy in channel estimation due to fixed transmission resources.
Innovation Solution
The method involves transmitting DMRS using different transmission patterns, with optional reference signals added in high-mobility scenarios to increase reference signal density, improving channel estimation accuracy while maintaining overhead efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed transmission resource is used for DMRS, then the system complexity is reduced and overhead is minimized, but the flexibility and adaptability for different terminal mobility scenarios deteriorates
Solution Approach 1:
The patent applies dynamics by enabling the DMRS transmission resource to switch between fixed and flexible patterns based on terminal mobility conditions. The network device determines whether to use a first transmission pattern (fixed resource) or second transmission pattern (flexible resource) according to the terminal's mobility state, making the system adaptive rather than static.
Solution Approach 2:
The patent changes the transmission resource parameters dynamically. When terminal mobility is high, the system switches to a different transmission pattern with adjusted time-frequency resource allocation. This parameter change allows the DMRS to be transmitted at appropriate intervals to track channel variations for mobile terminals while maintaining efficient resource usage for stationary terminals.
2Measurement precision
If optional reference signals are added for high-mobility terminals, then channel estimation accuracy is improved, but transmission overhead increases
Solution Approach 1:
The patent applies local quality by providing different transmission patterns tailored to specific terminal mobility conditions. High-mobility terminals receive the second transmission pattern with additional reference signals for accurate channel estimation, while low-mobility or stationary terminals use the first transmission pattern with fewer resources. This localized optimization ensures each terminal gets the appropriate level of service without universally increasing overhead for all terminals.
Solution Approach 2:
The patent uses partial action by selectively adding optional reference signals only when needed for high-mobility terminals rather than for all terminals. The network device determines based on mobility assessment whether to apply the enhanced transmission pattern, thereby achieving improved channel estimation accuracy only where necessary and avoiding unnecessary overhead for terminals that do not require it.
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The present application discloses a method for transmitting a reference signal, a terminal, and a network device. The method includes: a terminal receives first information sent by a network device, wherein the first information is used for indicating that a transmission pattern for transmitting a demodulation reference signal (DMRS) to be transmitted is a first transmission pattern or a second transmission pattern; and the terminal performs transmission of the DMRS to be transmitted with the network device on a transmission resource indicated by the first transmission pattern or the second transmission pattern. First information indicates a transmission pattern of the DMRS to be transmitted, thereby avoiding that the DMRS can be transmitted only on a fixed resource in the existing art, and being beneficial to improving flexibility for transmitting a DMRS.