DMRS Reference Point Configuration Without Common RB Grid
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Solution Overview
Problem
Current wireless communication systems face challenges in configuring a reference point for demodulation reference signals (DMRS) without relying on a common resource block grid, particularly in scenarios where information about the common RB grid is not available, which can lead to inefficiencies in resource utilization and communication reliability.
Innovation Solution
A method and apparatus for receiving and transmitting DMRS in a wireless communication system, where a terminal or base station configures a reference point for DMRS based on subcarrier #0 of the resource block with the lowest number within the control resource set (CORESET) #0, allowing communication without acquiring information about the common RB grid, and utilizing this reference point for efficient resource allocation and communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a common resource block grid is used for DMRS configuration, then resource allocation follows standard procedures, but the system cannot operate when common RB grid information is unavailable
Solution Approach 1:
The patent introduces an intermediary reference point (RP) based on the lowest-numbered RB within the UE-specific bandwidth that does not depend on the common RB grid. This RP serves as a mediator that enables DMRS configuration and PDSCH allocation without requiring common RB grid information, thereby resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent changes the reference parameter from the common RB grid to a UE-specific reference point defined by the lowest-numbered RB within the UE's bandwidth. This parameter change allows the system to operate independently of common RB grid information while maintaining structured resource allocation through the new reference framework.
2Productivity
If DMRS configuration relies on common RB grid information, then resource allocation is standardized, but resource utilization efficiency decreases when grid information is unavailable
Solution Approach 1:
The UE-specific reference point acts as an intermediary that enables both efficient resource utilization and reliable communication without common RB grid information. By defining resource allocation relative to this local reference point, the system achieves both productivity and reliability in grid-independent scenarios.
Solution Approach 2:
The patent applies local quality by defining a UE-specific reference point that is localized within the UE's bandwidth rather than relying on global common RB grid information. This local reference enables efficient and reliable resource allocation tailored to each UE's specific bandwidth configuration.
3Adaptability or versatility
If a UE-specific reference point independent of common RB grid is introduced, then operation without grid information becomes possible, but configuration complexity increases
Solution Approach 1:
The patent introduces a simplified intermediary reference point based on the lowest-numbered RB, which provides operational capability without common RB grid while maintaining relatively simple configuration. This reference point serves as a practical mediator that balances adaptability with configuration simplicity.
Data Source
AI summary
Disclosed herein is a method for receiving a demodulation reference signal (DMRS) in a wireless communication system. In particular, the method may include receiving a synchronization signal/physical broadcast channel (SS/PBCH) block, acquiring information about control resource set (CORESET) #0 from a PBCH included in the SS/PBCH block, receiving a physical downlink control channel (PDCCH) through CORESET #0, and receiving a physical downlink shared channel (PDSCH) scheduled based on the PDCCH and a DMRS for the PDSCH, wherein, based on the PDCCH being addressed to a system information-radio network temporary identifier (SI-RNTI), a reference point for the DMRS may be subcarrier #0 of a resource block (RB) having a lowest number among RBs included in CORESET #0.