Aperiodic SRS Configuration with Conditional Rate Matching
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring and managing aperiodic sounding reference signals (A-SRS) due to resource allocation conflicts with other uplink channels, leading to potential resource wastage and inefficient use of available bandwidth.
Innovation Solution
The proposed solution involves flexible A-SRS configuration techniques that allow for dynamic allocation of symbols for SRS transmission and rate matching, enabling efficient use of resources by only performing rate matching when necessary, thereby optimizing resource utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rate matching is always performed for A-SRS symbols, then SRS transmission reliability is improved, but resource utilization deteriorates due to unnecessary rate matching operations
Solution Approach 1:
The patent implements dynamic rate matching by determining whether to perform rate matching based on actual A-SRS transmission conditions. The system dynamically adjusts the rate matching operation: performing it when A-SRS is actually transmitted, and skipping it when A-SRS is not transmitted despite being configured. This dynamic approach resolves the contradiction by making the system adaptive to actual transmission needs rather than following a fixed rule.
2Adaptability or versatility
If additional SRS symbols are configured for potential transmission, then SRS transmission capability is improved, but resource wastage occurs when these symbols are not triggered
Solution Approach 1:
The patent applies partial action by configuring additional SRS symbols beyond what is immediately needed, but only activating them when actually triggered by uplink data transmission requirements. The system performs partial rate matching operations - only on the symbols that are actually used for SRS transmission - rather than treating all configured symbols as active. This resolves the contradiction by having readiness capability without permanent resource commitment.
3Adaptability or versatility
If A-SRS configuration includes multiple symbol locations, then transmission flexibility is improved, but configuration complexity increases
Solution Approach 1:
The patent segments the A-SRS configuration into distinct components: configured symbol locations, actual transmission triggers, and rate matching regions. By dividing the configuration management into separate manageable segments, the system can handle multiple symbol locations without proportionally increasing overall complexity. Each segment can be independently managed and processed.
Data Source
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AI summary
Certain aspects of the present disclosure provide techniques for aperiodic sounding reference signal (A-SRS) resource configuration and processing enhancements.