DM-RS Port Configuration for Wireless Signal Transmission
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in transmitting and receiving reference signals, particularly in high-frequency bands where phase noise and channel estimation challenges arise, leading to degraded performance.
Innovation Solution
The method involves dynamically configuring DM-RS ports and patterns based on higher layer signaling and specific frequency bands, allowing for flexible DM-RS allocation and usage, such as switching between DM-RS ports within CDM groups, and adjusting OCC applications to maintain channel estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If frequency-domain orthogonal cover code (OCC) is applied to DM-RS ports, then channel estimation accuracy is improved, but adaptability to different frequency bands and channel conditions deteriorates
Solution Approach 1:
The patent implements dynamic switching between frequency-domain OCC application and non-application based on higher layer signaling. The system can adaptively change the DM-RS port configuration and OCC usage according to different frequency bands and channel conditions, transforming a static configuration into a dynamic, adaptable system that resolves the contradiction between maintaining estimation accuracy and achieving frequency band adaptability
Solution Approach 2:
The patent changes the parameter of OCC application status (applied/not applied) based on higher layer signaling indications. By switching this parameter according to frequency band and channel conditions, the system achieves adaptability while maintaining optimal channel estimation performance for each specific scenario
2Device complexity
If DM-RS port configuration is fixed, then implementation complexity is reduced, but resource efficiency and channel estimation performance in varying conditions deteriorates
Solution Approach 1:
The patent introduces dynamic DM-RS port switching capability where the UE can switch between different DM-RS ports (e.g., from first DM-RS port to second DM-RS port) based on higher layer signaling. This dynamic configuration enables the system to optimize resource efficiency and channel estimation performance for different channel conditions without requiring complex real-time reconfiguration, thus resolving the contradiction between simplicity and performance
3Adaptability or versatility
If multiple DM-RS ports are configured for all UEs, then channel estimation flexibility is improved, but signal-to-noise ratio and interference management in high-frequency bands deteriorates
Solution Approach 1:
The patent extracts and applies frequency-domain OCC specifically to certain DM-RS ports (e.g., second DM-RS port) while leaving other ports without OCC application. This selective application allows the system to maintain flexibility through multiple port configurations while concentrating resources on specific ports, thereby improving signal-to-noise ratio and managing interference more effectively in high-frequency bands
Solution Approach 2:
The patent applies different processing (OCC application or non-application) to different DM-RS ports based on their specific usage scenarios. By making the quality of signal processing local to each port rather than uniform across all ports, the system optimizes performance for each specific channel condition while maintaining overall flexibility
Data Source
AI summary
Provided are a method and apparatus for transmitting and receiving a signal in a wireless communication system, according to an embodiment of the present disclosure, the method comprising the steps of: receiving information indicating a demodulation-reference signal (DM-RS) port related to transmission of a physical uplink shared channel (PUSCH); and transmitting the PUSCH and a DM-RS on the basis of the information. Provided are a method and apparatus for transmitting and receiving a signal in a wireless communication system, according to another embodiment of the present disclosure, the method comprising the steps of: receiving information indicating a demodulation-reference signal (DM-RS) port related to reception of a physical downlink shared channel (PDSCH); and receiving the PDSCH and a DM-RS on the basis of the information. On the basis of a determination about a frequency domain orthogonal cover code (OCC) being not applied to the DM-RS port indicated by the information, the DM-RS may be transmitted after a change operation for the DM-RS port.