SRS Time-Domain Bundling for Phase Continuity
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Solution Overview
Problem
Next-generation wireless communication systems face challenges in accurately estimating sounding reference signals (SRS) due to phase discontinuity between SRS transmissions over multiple occasions, which affects joint processing and channel estimation at base stations.
Innovation Solution
Maintaining phase continuity across SRS transmissions by configuring SRS occasions with identical parameters such as spatial relation information, transmission comb, frequency domain position, and frequency hopping, allowing base stations to jointly process SRS transmissions from user equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If SRS transmissions are scheduled over multiple occasions with different configurations, then resource allocation flexibility is improved, but phase discontinuity occurs between transmissions
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting SRS configuration parameters (such as spatial relation information, transmission comb, frequency domain position, and frequency hopping) across different SRS occasions. The base station configures specific parameter sets that ensure phase continuity is maintained while still allowing resource allocation flexibility. This resolves the contradiction by showing that controlled parameter changes can achieve both adaptability and reliability.
2Measurement precision
If phase continuity is maintained across SRS transmissions, then joint processing accuracy is improved, but configuration complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring phase continuity requirements and parameter settings before SRS transmissions occur. The base station provides ahead-of-time configuration information to the UE, specifying which parameters should be maintained across occasions to ensure phase continuity. This reduces configuration complexity during actual transmission while maintaining joint processing accuracy.
3Measurement precision
If SRS transmissions are bundled in time domain, then channel estimation accuracy is improved, but processing requirements at base station increase
Solution Approach 1:
The patent applies merging by combining multiple SRS transmissions in the time domain into a bundled structure. By maintaining phase continuity across bundled transmissions, the base station can jointly process them to achieve improved channel estimation accuracy. The configuration methods described enable efficient bundling that balances enhanced measurement precision with manageable processing requirements.
Data Source
AI summary
Aspects relate to sounding reference signal (SRS) time-domain bundling. Phase continuity may be maintained across SRS transmissions over multiple SRS occasions to enable a receiver to jointly process these SRS transmissions. In some examples, a user equipment may expect to be configured with SRS transmissions over multiple SRS occasions where SRS configurations for different SRS transmissions over different SRS occasions specify the same parameters. For example, a first SRS configuration for a first SRS transmission over a first SRS occasion may specify a first set of spatial relation information. In addition, a second SRS configuration for a second SRS transmission over a second SRS occasion may specify that same first set of spatial relation information. In this way, phase continuity may be maintained between the first SRS transmission over the first SRS occasion and the second SRS transmission over the second SRS occasion.