DMRS Symbol Alignment for Multi-TRP Wireless Data Channels
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Solution Overview
Problem
In wireless communication systems, particularly in next-generation mobile communication, there is a challenge in efficiently managing data transmission and reception due to increased data traffic, latency, and interference between multiple transmission and reception points, which affects the reliability and speed of data channels.
Innovation Solution
A method is proposed where a user equipment (UE) receives control resource configuration information for multiple control resource set groups, and based on a cell reference signal pattern, determines the symbol locations of demodulation reference signals (DMRS) for data channels, allowing for coordinated transmission and reception across multiple transmission and reception points, thereby reducing interference and enhancing data channel reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple control resource set groups are configured in a UE for increased data traffic handling, then data transmission capacity is improved, but interference between multiple transmission and reception points increases
Solution Approach 1:
The patent segments the control resource sets into multiple control resource set groups (first and second groups), each associated with different transmission points. This segmentation allows the UE to manage resources from multiple TRPs separately, reducing interference while maintaining high data transmission capacity through coordinated multi-point operation.
Solution Approach 2:
The patent introduces a new dimension for resource organization by creating separate control resource set groups that can be independently configured and managed. This dimensional separation in the resource structure enables the system to handle multiple TRPs without their signals interfering with each other, as each group operates in a distinct resource dimension.
2Reliability
If DMRS symbol locations are determined dynamically for multiple data channels, then data channel reception quality is improved, but system complexity increases
Solution Approach 1:
The patent changes the parameter of DMRS symbol location from a fixed configuration to a dynamically determined value based on cell reference signal patterns. This allows the system to optimize reception quality by adapting DMRS positions to actual channel conditions while maintaining manageable complexity through standardized determination rules.
Solution Approach 2:
The patent applies preliminary action by pre-configuring control resource set groups and their associated parameters before data transmission begins. This preliminary configuration establishes the framework for determining DMRS locations, reducing the complexity of real-time decisions while still allowing dynamic adaptation for optimal reception quality.
3Object-affected harmful factors
If cell reference signal pattern is applied to determine DMRS locations, then interference mitigation is improved, but processing overhead increases
Solution Approach 1:
The patent uses copying by applying the cell reference signal pattern as a template for determining multiple DMRS symbol locations across different data channels. Instead of independently calculating each DMRS position, the system copies the pattern structure, significantly reducing processing overhead while maintaining effective interference mitigation through consistent pattern-based positioning.
Data Source
AI summary
A method for a terminal to receive a data channel in a wireless communication system includes: a step for receiving control resource setting information based on a first control resource set group and a second control resource set group; a step for receiving information about a cell reference signal pattern related to one among the first control resource set group and the second control resource set group; and a step for receiving a first data channel related to the first control resource set group and a second data channel related to the second control resource set group, wherein symbol positions of a first demodulation reference signal of the first data channel and a second demodulation reference signal of the second data channel may be determined on the basis of the cell reference signal pattern.