DMRS Configuration in 5G NR IoT Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing 5G communication systems face challenges in effectively configuring demodulation reference signal (DMRS) information, particularly in the new radio (NR) system, where flexible DMRS patterns and positions are required to ensure optimal system performance, especially in IoT environments where data collection and analysis are critical.
Innovation Solution
A method for configuring DMRS-related information in user equipment (UE) and base stations, involving the reception and transmission of configuration information, downlink control information, and identification of DMRS symbol positions based on received signals, to optimize DMRS symbol placement and number in the time domain, supporting various DMRS patterns and scheduling types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If flexible DMRS patterns and positions are implemented in 5G NR systems, then system adaptability and performance are improved, but configuration complexity increases
Solution Approach 1:
The patent implements dynamic DMRS configuration where the number of additional DMRS symbols and their positions are determined based on real-time scheduling decisions and channel conditions. The base station can flexibly adjust DMRS parameters through DCI signaling, allowing the system to adapt to varying traffic requirements and channel states while maintaining manageable configuration complexity through automated control
Solution Approach 2:
The patent changes key DMRS parameters (number of additional symbols, symbol positions, density) based on scheduling type and channel conditions. By dynamically adjusting these parameters rather than using fixed configurations, the system achieves versatility in handling different IoT application requirements while the parameter changes are controlled through standardized signaling procedures
2Measurement precision
If multiple additional DMRS symbols are configured, then measurement precision and channel estimation accuracy are improved, but overhead and resource consumption increase
Solution Approach 1:
The patent applies partial action by configuring additional DMRS symbols only when necessary based on channel conditions, scheduling type, and traffic requirements. Rather than always using maximum DMRS density, the system selectively adds DMRS symbols in challenging channel conditions or for specific IoT applications requiring high reliability, thereby improving measurement precision only when needed while minimizing overhead in normal conditions
Solution Approach 2:
The number of additional DMRS symbols is dynamically determined based on channel quality indicators, scheduling type (slot-based or non-slot-based), and service requirements. This dynamic adjustment allows the system to optimize the balance between measurement precision and overhead by adding DMRS resources only when channel conditions or application requirements justify the additional overhead
3Reliability
If DMRS configuration is optimized for specific IoT applications, then reliability and data transmission performance are improved, but system complexity and configuration management difficulty increase
Solution Approach 1:
The patent implements a universal DMRS configuration framework that can serve multiple IoT application types through a single standardized mechanism. The same DMRS configuration procedures and signaling methods are used across different IoT services (eV2X, MTC, NB-IoT), allowing the system to optimize reliability for specific applications without creating separate configuration management systems, thus avoiding increased complexity
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th generation (5G) communication system with a technology for Internet of Things (IoT) to support higher data rates beyond a 4th generation (4G) system. A method of a UE is provided. The method includes receiving, from a base station, configuration information including first information on a number of an additional demodulation reference signal (DMRS) symbol by higher layer signaling, receiving, from the base station, downlink control information (DCI) including second information on a time domain resource, identifying third information on a duration in symbols of a scheduled physical downlink shared channel (PDSCH) resource based on the second information, identifying a position of a DMRS symbol based on the first information and the third information, and receiving, from the base station, at least one DMRS based on the position of the DMRS symbol.