Uplink Data Channel Mini-Slot Repetition for URLLC Reliability
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Solution Overview
Problem
Current communication systems lack a method to determine R time domain resources for mini-slot-level data transmission, which is essential for ultra-reliable and low-latency communication (URLLC) to achieve 99.999% reliability and less than 1 millisecond latency with minimal instruction overhead.
Innovation Solution
A data transmission method that determines R first time domain resources for mini-slot-level data transmission, where the terminal device or network device repeatedly sends or receives data channels on these resources, reducing signaling overheads and improving reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slot-level repetition is used for data transmission, then data transmission reliability is improved, but transmission latency increases and cannot meet URLLC requirements of less than 1 millisecond
Solution Approach 1:
The patent segments the slot-level repetition into mini-slot-level repetition by dividing the time domain resources into smaller units. Instead of repeating data across entire slots, the invention repeats data within mini-slots that occupy only a portion of a slot, thereby reducing the time required for repetition while maintaining reliability through multiple transmissions.
2Loss of time
If mini-slot-level repetition is implemented to reduce latency, then transmission latency decreases, but there is no established method to determine R time domain resources
Solution Approach 1:
The patent introduces a new parameter R (mini-slot repetition count) to control the number of mini-slot repetitions. By changing the repetition granularity from slot-level to mini-slot-level and defining R as a configurable parameter, the system can adjust the number of repetitions independently of slot structure, enabling flexible latency control while providing a clear method for determining time domain resources.
3Reliability
If URLLC service requirements are met with 99.999% reliability and less than 1 millisecond latency, then communication performance is improved, but instruction overheads increase
Solution Approach 1:
The patent uses copying by transmitting identical data copies across multiple mini-slots instead of using complex error correction codes or extensive signaling. The repetition of data channels in mini-slots provides redundancy that improves reliability without requiring additional instruction overhead for error correction, as the same data is simply transmitted multiple times across different time resources.
Data Source
AI summary
A data transmission system and method, the method including determining one piece of first time domain resource information in at least one piece of first time domain resource information, where each of the at least one piece of first time domain resource information comprises R and one piece of first indication information, and where the first indication information indicates a start symbol and a length of a 1st first time domain resource in the R first time domain resources, determining R first time domain resources, where the R first time domain resources are consecutive in a time domain, and R is a positive integer, and sending an uplink data channel on each of the R first time domain resources, where the uplink data channel sent on each of the R first time domain resources is the same.