DMRS Time Domain Resource Alignment for 5G Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In communications systems, especially those employing 5G technology, the fixed time domain resource for demodulation reference signals (DMRS) can lead to interference and errors in data demodulation due to differing data transmission directions between adjacent cells, causing inaccurate channel estimation and demodulation in dynamic TDD, flexible duplex, or full duplex scenarios.
Innovation Solution
A method and apparatus for determining a time domain resource mapped by a reference signal, where user equipment and base stations use configuration information to align the time domain resources for uplink and downlink reference signals, ensuring they share the same resources, thereby preventing interference and ensuring accurate demodulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the time domain resource of the DMRS is fixed, then the structure is simple and easy to implement, but interference occurs between DMRS and data transmitted by adjacent cells, causing errors in DMRS demodulation and inaccurate channel estimation
Solution Approach 1:
The patent applies dynamics by making the DMRS time domain resource configurable rather than fixed. The base station can dynamically adjust the DMRS resource position based on different transmission scenarios (dynamic TDD, flexible duplex, full duplex) to avoid interference with uplink or downlink data, thereby maintaining demodulation accuracy while adapting to changing conditions
Solution Approach 2:
The patent changes the parameter of DMRS time domain resource position from a fixed value to a configurable parameter. By modifying this parameter according to different cell configurations and transmission directions, the system avoids interference between adjacent cells while maintaining simple implementation through standardized configuration mechanisms
2Ease of operation
If the time domain resource of the DMRS is fixed, then implementation is straightforward, but the fixed resource cannot meet requirements for transmitting data in different scenarios, causing errors in data demodulation
Solution Approach 1:
The patent introduces dynamic configurability to the DMRS time domain resource allocation, allowing the system to adapt to different data transmission scenarios (dynamic TDD, flexible duplex, full duplex) while maintaining straightforward implementation through base station-controlled configuration and standardized UE behavior
3Adaptability or versatility
If adjacent cells use different time domain resources for DMRS transmission, then each cell can optimize for its specific scenario, but interference occurs between DMRS and data from other cells, leading to inaccurate channel estimation
Solution Approach 1:
The patent applies homogeneity by ensuring that cells in the same network follow the same DMRS resource configuration rules and principles. This standardized approach ensures that DMRS resources are consistently allocated across the network, preventing interference between adjacent cells and maintaining uniform channel estimation accuracy throughout the system
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
Embodiments of the present invention provide a method and an apparatus for determining a time domain resource mapped by a reference signal, and relate to the field of communications technologies, to ensure correct data demodulation. The method includes: determining, by user equipment based on configuration information, a time domain resource mapped by a reference signal and/or a subcarrier spacing of the reference signal, where the configuration information includes predefined first configuration information and/or second configuration information sent by a base station. The method is applied to a scenario of determining the time domain resource mapped by the reference signal.