5G Reference Signal Positioning Across Slot-Boundary Repetitions
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Solution Overview
Problem
In the context of 5G mobile communication systems, there is a lack of clear guidance on how to split demodulation reference signals (DMRS) when a transmission repetition is split into multiple repetitions across slot boundaries, leading to inconsistent understanding between network devices and terminal equipment, which affects transmission reliability.
Innovation Solution
A method and apparatus for determining the position of reference signals based on time-domain resource segments, ensuring consistent understanding between network devices and terminal equipment, thereby improving transmission reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repetition transmission is used to improve reliability, then transmission reliability is improved, but transmission latency increases
Solution Approach 1:
The patent segments the transport block into multiple repetitions and transmits them across different slots. By dividing the transmission into manageable segments that can be distributed across slot boundaries, the system achieves both reliability through redundancy and controlled latency through structured segmentation.
Solution Approach 2:
The patent introduces dynamic adjustment mechanisms for repetition transmission, allowing the system to adaptively control the number and positioning of repetitions based on channel conditions and service requirements. This dynamic approach enables optimization of the trade-off between reliability and latency.
2Loss of time
If multiple repetitions are transmitted in one slot to reduce latency, then transmission latency is reduced, but resource allocation complexity increases
Solution Approach 1:
The patent segments repetitions across slot boundaries with clear demarcation rules. By defining specific patterns for how repetitions are distributed across slots and specifying reference signal positioning within each segment, the system reduces latency while maintaining manageable resource allocation through structured segmentation.
Solution Approach 2:
The patent changes the temporal parameters of repetition transmission by allowing repetitions to span across slot boundaries. This parameter change enables more flexible resource allocation that can fit multiple repetitions within constrained time resources, thereby reducing latency while the standardized parameter changes keep allocation complexity manageable.
3Reliability
If DMRS is split across multiple repetitions, then reference signal coverage is improved, but positioning consistency deteriorates
Solution Approach 1:
The patent segments the reference signal transmission across multiple repetitions while defining clear positioning rules for each segment. By establishing standardized patterns for reference signal placement within each repetition segment, the system improves overall coverage while maintaining positioning consistency through structured segmentation and standardized positioning within segments.
Solution Approach 2:
The patent applies parameter changes to reference signal positioning by defining specific offset patterns and positioning rules that adapt to different repetition configurations. These standardized parameter changes ensure that reference signals maintain consistent positioning relationships across segmented repetitions, thereby improving coverage while preserving positioning consistency.
Data Source
AI summary
A method and apparatus for transmitting a reference signal and a communication system. The reference signal transmission method includes: a transmitter end generates one or more signals corresponding to the same transport block, the one or more signals including a data channel and a reference signal; and the transmitter end transmits the one or more signals in one or more time-domain resource segments, positions of reference signals being determined based on the one or more time-domain resource segments. The terminal equipment and the network device may be able to determine the positions of the reference signals in an actual repetition according to time-domain resource segments occupied by the actual repetition.