Configurable DMRS Sequence Length for 5G Adaptability
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Solution Overview
Problem
The 5G communications system faces challenges in determining a suitable design for the sequence of demodulation reference signals (DMRS) due to diversified transmission requirements, including the coexistence of high and low frequencies and multiple numerologies, which differ from the fixed DMRS design in LTE systems.
Innovation Solution
A method and apparatus for sending and demodulating DMRS are developed, where the sequence length is related to the attributes of the DMRS, such as pattern and density, allowing for configurable DMRS patterns and densities to support various communication scenarios in 5G systems, including M2M, eMBB, uRLLC, and mMTC scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed DMRS design like LTE is used, then the system structure is simple, but it cannot support diversified transmission requirements including multiple numerologies and frequency scenarios in 5G
Solution Approach 1:
The patent applies dynamics by making the DMRS sequence length configurable rather than fixed. The sequence length can be dynamically adjusted based on the DMRS pattern type (first pattern uses full sequence, second pattern uses partial sequence) and density configuration, allowing the system to adapt to different transmission requirements while maintaining a unified base design framework
Solution Approach 2:
The patent changes the sequence length parameter of DMRS based on different configuration scenarios. By modifying the sequence length parameter according to pattern type and density, the system achieves versatile support for multiple numerologies and frequency scenarios without requiring fundamentally different design structures
2Adaptability or versatility
If the DMRS sequence length is fixed, then the generation and processing is simple, but it cannot meet different density and pattern requirements for various 5G scenarios
Solution Approach 1:
The patent makes the DMRS sequence length dynamic by configuring it based on pattern type and density requirements. The transmit end device determines the appropriate sequence length according to the selected pattern (first or second) and density configuration, enabling flexible adaptation to different 5G scenarios while maintaining straightforward generation processes
Solution Approach 2:
The patent modifies the sequence length parameter according to different operational requirements. By changing this parameter based on pattern type and density, the system achieves configurability for various scenarios without complicating the overall generation and processing procedures
3Productivity
If configurable DMRS patterns and densities are implemented, then various 5G scenarios can be supported, but the system complexity increases
Solution Approach 1:
The patent segments the DMRS configuration into distinct pattern types (first pattern and second pattern) with different sequence length requirements. This segmentation allows the system to support diverse scenarios by selecting appropriate patterns without requiring a completely new design for each case, thereby managing complexity through structured classification
Solution Approach 2:
The patent creates a universal DMRS design framework that can handle multiple scenarios through configuration rather than separate designs. The same base structure supports different numerologies, frequencies, patterns, and densities by adjusting parameters, achieving multi-functionality without proportionally increasing system complexity
Data Source
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AI summary
Embodiments of this application disclose a method and apparatus for sending a demodulation reference signal, and a demodulation method and apparatus, and relate to the field of communications technologies. The method for sending a demodulation reference signal may include: generating a demodulation reference signal, where a sequence length of the demodulation reference signal is related to an attribute of the demodulation reference signal; and sending the demodulation reference signal. Configurable density of the demodulation reference signal and/or a configurable pattern corresponding to the demodulation reference signal are/is supported in the technical solution, and the technical solution may be applied to a 5G communications system.