DMRS Mapping in 5G NR Mini-Slots for Channel Demodulation
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Solution Overview
Problem
There is no existing DMRS configuration and transmission method in the mini-slot scenario within the 5G NR system, which hinders efficient channel demodulation and resource utilization.
Innovation Solution
A DMRS transmission method for network devices that configures and maps antenna ports to time-domain and frequency-domain resources within mini-slots, allowing for the multiplexing of service and control channels to improve resource utilization and demodulation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DMRS is not configured in mini-slot scenario, then resource allocation remains simple, but channel demodulation cannot be performed and data transmission fails
Solution Approach 1:
The patent applies universality by making the DMRS configuration method applicable to both normal slot scenarios and mini-slot scenarios. The same DMRS configuration principles and resource mapping methods are used across different transmission scenarios, allowing the system to handle various slot types with a unified approach rather than requiring separate configurations for each scenario.
Solution Approach 2:
The patent applies dynamics by enabling flexible DMRS configuration that adapts to different mini-slot durations and service requirements. The DMRS can be configured with varying time-domain positions, frequency-domain densities, and antenna port mappings depending on the specific mini-slot length and traffic conditions, allowing the system to optimize performance for each scenario dynamically.
2Measurement precision
If DMRS is configured for service channel in mini-slot, then demodulation performance improves, but resource overhead increases
Solution Approach 1:
The patent applies local quality by configuring DMRS with specific properties tailored to the mini-slot scenario requirements. Different DMRS configurations (such as front-loaded DMRS, additional DMRS, different density patterns) are applied locally based on the specific needs of each service channel transmission, rather than using a uniform configuration across all scenarios. This allows optimization of demodulation accuracy where needed while minimizing overhead elsewhere.
Solution Approach 2:
The patent applies partial action by configuring DMRS only where and when needed for service channel demodulation in mini-slots. Rather than continuously transmitting DMRS in all resources, the configuration is applied partially based on the presence of service channels, the mini-slot duration, and channel conditions, thereby reducing overall resource overhead while maintaining necessary demodulation capability.
3Productivity
If antenna ports are mapped to time-frequency resources in mini-slot, then resource utilization improves, but configuration complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the mini-slot time-frequency resources into distinct regions for different purposes: control channel resources, service channel resources, and DMRS resources. The antenna ports are mapped to specific segmented resource elements according to defined patterns, which simplifies the configuration process by providing structured mapping rules rather than requiring arbitrary assignments.
Solution Approach 2:
The patent applies preliminary action by pre-defining DMRS configuration parameters and resource mapping patterns for mini-slot scenarios. The network device determines DMRS configurations (such as time-domain position, frequency-domain density, scrambling IDs) in advance based on the mini-slot structure, and these pre-determined configurations are then applied systematically to multiple antenna ports, reducing the complexity of real-time configuration decisions.
Data Source
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AI summary
A DMRS transmission method, a network device, and a computer-readable storage medium are provided. The DMRS transmission method includes: configuring a DMRS for a service channel within a mini-slot; mapping at least one antenna port corresponding to the DMRS for the service channel to a time-domain transmission resource and a frequency-domain transmission resource corresponding to a DMRS for a control channel within the mini-slot; and transmitting the DMRS for the service channel on the time-domain transmission resource and the frequency-domain transmission resource.