Front-Loaded DMRS Positioning Across Variable 5G Slot Structures
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Solution Overview
Problem
In 5G wireless communication systems, the dynamic change of front-loaded DMRS positions to minimize latency complicates DMRS interference management in synchronized networks due to varying slot structures.
Innovation Solution
A method for configuring and indicating the position of front-loaded DMRS in various slot structures, including semi-static and dynamic signaling methods, to optimize DMRS placement for efficient radio resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the position of front-loaded DMRS is dynamically changed to minimize latency, then latency is reduced, but DMRS interference management becomes complicated
Solution Approach 1:
The patent implements dynamic DMRS position configuration where the DMRS position can be adjusted based on slot structure and transmission conditions. The system dynamically selects DMRS positions from multiple candidate positions according to different slot types (e.g., 7-symbol or 14-symbol slots) and transmission scenarios, enabling latency optimization while maintaining manageable interference through structured dynamic adjustment rather than arbitrary changes
Solution Approach 2:
The patent changes the parameter of DMRS position index based on slot structure parameters. Different slot configurations (7-symbol vs 14-symbol slots, different subcarrier spacings) map to different DMRS position configurations. This parameter-based approach allows systematic management of DMRS positions across varying conditions, reducing interference management complexity while enabling latency reduction through appropriate position selection
2Device complexity
If DMRS position is fixed to simplify interference management, then interference management is simplified, but latency reduction capability is limited
Solution Approach 1:
The system transitions from fixed DMRS positioning to dynamic positioning based on slot structure. The DMRS position is determined by evaluating slot type and transmission conditions, allowing the system to adapt positions for latency-critical scenarios while maintaining structured management through predefined position mappings for different slot configurations
Solution Approach 2:
The patent introduces parameter-based DMRS position selection where the position index is derived from slot structure parameters. This allows the system to maintain simplicity through parameterized configurations while gaining the flexibility to optimize latency by selecting appropriate parameters for different transmission scenarios
3Adaptability or versatility
If various slot structures are supported to enhance adaptability, then adaptability is improved, but DMRS positioning complexity increases
Solution Approach 1:
The patent implements a universal DMRS positioning framework that handles multiple slot structures (7-symbol slots, 14-symbol slots, different subcarrier spacings) through a unified approach. The same basic positioning logic and parameter mapping rules apply across all slot types, enabling the system to support diverse slot structures without proportionally increasing positioning complexity
Solution Approach 2:
The system uses parameter-based configuration where slot structure characteristics (symbol count, subcarrier spacing) map to corresponding DMRS position parameters. This parameterized approach allows the system to adapt to various slot structures through configuration rather than complex conditional logic, maintaining positioning management simplicity while enhancing adaptability
Data Source
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AI summary
The present disclosure relates to a terminal in a wireless communication system, the terminal comprising: a transceiver; and at least one processor configured to: control the transceiver to receive, on a physical broadcast channel (PBCH), a master information block (MIB) including information for a position of a first demodulation reference signal (DMRS); identify a mapping type for a downlink from a first mapping type for the downlink and a second mapping type for the downlink.