DCI SRS Indicator for Single Multi-TRP Switching
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Solution Overview
Problem
Current wireless communication systems face challenges in dynamically switching between single-TRP and multi-TRP transmission without introducing significant overhead, which affects the reliability and robustness of PUSCH transmissions.
Innovation Solution
The proposed solution involves a method where a terminal device receives DCI indicating whether to use a single SRS resource set or multiple SRS resource sets for PUSCH transmissions, with an additional field to specify the index of the single SRS resource set, allowing for dynamic switching between single-TRP and multi-TRP transmission while minimizing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dynamic switching between single-TRP and multi-TRP transmission is supported, then reliability and robustness of PUSCH transmissions is improved, but control overhead increases
Solution Approach 1:
The SRS resource indicator field in DCI is designed to serve dual purposes: indicating SRS resource selection for multi-TRP transmission and indicating SRS resource selection for single-TRP transmission. This multi-functional design allows the same field to support both transmission modes without requiring separate indication fields, thereby reducing control overhead while maintaining reliability improvements from dynamic switching capability
Solution Approach 2:
The patent utilizes parameter configuration where the network configures multiple SRS resource sets with different usage purposes (e.g., first SRS resource set for codebook-based transmission, second SRS resource set for non-codebook-based transmission). By changing the interpretation of the SRS resource indicator field based on configured parameters and transmission mode, the system achieves dynamic switching between single-TRP and multi-TRP without additional overhead
2Reliability
If multiple SRS resource sets are configured for multi-TRP transmission, then communication reliability is improved, but DCI overhead increases
Solution Approach 1:
The SRS resource indicator field is designed to universally indicate SRS resources for both single-TRP and multi-TRP scenarios. When multi-TRP is configured, the same field indicates resources across multiple TRPs; when single-TRP is configured, it indicates resources for a single TRP. This eliminates the need for separate indication fields for different TRP configurations, reducing DCI overhead while maintaining the ability to configure multiple SRS resource sets for improved reliability
3Adaptability or versatility
If separate indication fields are added for single-TRP and multi-TRP modes, then switching flexibility is improved, but control overhead increases
Solution Approach 1:
The patent makes the SRS resource indicator field multi-functional by configuring it to interpret different values or combinations to indicate both single-TRP and multi-TRP modes. The field serves as a universal indicator that adapts its meaning based on higher-layer configuration and current transmission mode, providing switching flexibility without requiring separate indication fields for each mode
Solution Approach 2:
The system implements dynamic switching between single-TRP and multi-TRP modes through the flexible interpretation of the SRS resource indicator field. The indication mechanism dynamically adapts based on configured parameters, allowing the system to switch transmission modes without static separate fields, thereby maintaining flexibility while minimizing overhead
Data Source
AI summary
Embodiments of the present disclosure relate to a method, device and computer readable storage medium of communication. The method comprises receiving at a terminal device a DCI for scheduling at least one PUSCH transmission from a network device. The DCI comprises a first field indicating that the at least one PUSCH transmission is to be transmitted based on a SRS resource set from a plurality of SRS resource sets or the plurality of SRS resource sets, and a second field indicating an index of the single SRS resource set for transmitting the at least one PUSCH transmission. The method further comprises transmitting, by the terminal device, the at least one PUSCH transmission based on the DCI to the network device. In this way, when supporting dynamic switching between single-TRP transmission and multi-TRP transmission, the newly-introduced overhead may be minimized.