Aperiodic Reference Signal Scheduling for Selective Slot Triggering
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Solution Overview
Problem
Existing methods for triggering aperiodic SRS transmission in terminals with 1T8R antenna configuration are inefficient, leading to reduced transmission efficiency and increased overhead due to unnecessary re-triggering of SRS transmission in slots where it was already performed.
Innovation Solution
A method for flexible scheduling of aperiodic SRS transmission by indicating a portion of candidate unit time resources using trigger information, allowing dynamic adjustment of SRS transmission in some slots, thereby improving transmission efficiency and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If aperiodic SRS transmission is triggered in all candidate slots, then channel estimation accuracy is improved, but transmission overhead increases and efficiency decreases due to unnecessary re-triggering
Solution Approach 1:
The patent applies partial action by triggering SRS transmission only in selected candidate slots rather than all candidate slots. The base station indicates a subset of slots where SRS transmission should occur, avoiding unnecessary transmissions in slots where SRS was already performed or where transmission is not needed, thus reducing overhead while maintaining adequate channel estimation accuracy.
Solution Approach 2:
The patent changes the triggering parameter from binary (trigger or not trigger) to selective triggering based on indicated slot information. By modifying the trigger indication to specify particular slots out of multiple candidate slots, the system optimizes the balance between measurement precision and transmission overhead.
2Reliability
If SRS transmission is re-triggered in slots where it was already performed, then transmission reliability is improved, but transmission efficiency decreases due to redundant transmissions
Solution Approach 1:
The patent implements feedback mechanism where the base station receives SRS transmission status information from the terminal and uses this feedback to determine whether re-triggering is necessary. The trigger indication is adjusted based on actual transmission outcomes, avoiding redundant re-triggering in slots where SRS was already successfully performed while maintaining reliability where needed.
Solution Approach 2:
The patent makes the triggering mechanism dynamic by adapting the trigger indication based on actual transmission status. Rather than using a fixed re-triggering rule, the system dynamically adjusts which slots require SRS transmission based on real-time feedback about whether SRS was already transmitted, thereby improving efficiency without compromising reliability.
3Adaptability or versatility
If multiple candidate time resources are allocated for aperiodic SRS transmission, then transmission flexibility is improved, but system complexity increases due to resource management overhead
Solution Approach 1:
The patent segments the candidate time resources into multiple discrete slots and provides individual indication for each slot where SRS transmission should occur. This segmentation allows flexible resource allocation while simplifying management by treating each indicated slot as an independent unit, reducing the complexity of managing continuous or overlapping resource blocks.
Data Source
AI summary
ne present invention improves reference signal transmission efficiency. A terminal is equipped with: a reception circuit for receiving information indicating some of a plurality of candidate unit-time resources for non-periodic transmission of reference signals; and a control circuit for, on the basis of the information, controlling the allocation of time resources to be used in the transmission of reference signals.