Reference Signal Determination for URLLC Resource Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current mobile communication technologies, such as 4G LTE and 5G, face challenges in reducing reference signal overheads during ultra-reliable and low-latency communication (URLLC) due to the need for transmitting reference signals in each short transmission time interval, which reduces resource utilization.
Innovation Solution
The method involves indicating that a reference signal exists in only some of the scheduled transmission time intervals, rather than all, and optimizing the mapping of control channel elements to reduce overhead by using distributed mapping principles, allowing for flexible scheduling and resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a reference signal is transmitted in each short transmission time interval to support URLLC, then the reliability of communication is improved, but the reference signal overhead increases and resource utilization rate decreases
Solution Approach 1:
The patent segments the transmission time intervals into groups and applies different reference signal transmission strategies to different groups. Specifically, it transmits reference signals in the first TTI of each group but omits them in subsequent TTIs within the same group, thereby reducing overall reference signal overhead while maintaining communication reliability through selective reference signal transmission.
Solution Approach 2:
The patent implements periodic reference signal transmission by configuring reference signals to appear at regular intervals (e.g., in the first TTI of each group of N TTIs) rather than in every TTI. This periodic pattern reduces reference signal overhead while ensuring that reference signals are transmitted frequently enough to maintain URLLC reliability requirements.
2Measurement precision
If reference signals are transmitted in every scheduled transmission time interval, then the demodulation accuracy is maintained, but the resource utilization rate is reduced
Solution Approach 1:
The patent applies partial action by transmitting reference signals in only some of the scheduled transmission time intervals (specifically, in the first TTI of each group and potentially in the last TTI depending on configuration) rather than in all TTIs. This partial transmission strategy maintains sufficient demodulation accuracy for URLLC while improving resource utilization by eliminating redundant reference signal transmissions in TTIs where they are not strictly necessary.
3Speed
If multiple short transmission time intervals are scheduled to meet latency requirements, then the transmission speed is improved, but the reference signal overhead increases
Solution Approach 1:
The patent merges multiple transmission time intervals into groups and applies a unified reference signal transmission strategy to each group. By combining several TTIs into a single group and transmitting reference signals only in specific TTIs within the group (rather than in each individual TTI), the patent reduces reference signal overhead while maintaining the fast transmission speed required for URLLC applications.
Data Source
AI summary
Provided are a method and device for determining a reference signal, a method and device for determining a semi-persistent scheduling (SPS) transmission time, and a storage medium. The method for determining a reference signal includes: indicating, in a preset manner, that the reference signal exists in at least one of N scheduled transmission time intervals, where N is a positive integer.