SRS Resource Set TCI Association for PUSCH
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Solution Overview
Problem
The challenge of configuring and indicating transmission configuration indicators (TCI) for physical uplink shared channel (PUSCH) repeated transmission in multi-antenna panel scenarios is not adequately addressed in existing communication systems.
Innovation Solution
A method and apparatus for configuring and indicating SRS resource sets associated with TCI states for codebook-based or non-codebook-based PUSCH transmission, utilizing RRC, DCI, and MAC CE signaling to manage unified TCI states in multi-TRP/antenna panel scenarios, ensuring proper uplink spatial filter determination for PUSCH.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple TCI states are configured for PUSCH repeated transmission under multiple antenna panels, then the adaptability and versatility of uplink transmission is improved, but the device complexity and difficulty of configuration increases
Solution Approach 1:
The patent segments the TCI configuration by associating different TCI states with different SRS resource sets (first SRS resource set with first TCI state, second SRS resource set with second TCI state). This segmentation allows independent configuration and management of TCI states for different antenna panels, reducing overall configuration complexity while maintaining multi-panel transmission adaptability.
Solution Approach 2:
The patent employs preliminary action by pre-configuring SRS resource sets with their associated TCI states before actual PUSCH transmission. The network device configures multiple SRS resource sets with different TCI states in advance, and the terminal device stores these configurations for later use during PUSCH repeated transmission, eliminating the need for dynamic configuration during transmission.
2Reliability
If multiple SRS resource sets with different TCI states are configured, then the reliability of PUSCH transmission is improved through multi-antenna diversity, but the quantity of configuration parameters and signaling overhead increases
Solution Approach 1:
The patent makes the SRS resource sets universal by configuring them to serve multiple purposes: they are used for both uplink channel sounding and for determining TCI states for PUSCH transmission. Each SRS resource set is associated with a specific TCI state, allowing the same SRS configuration to support multiple antenna panels and transmission scenarios, thereby reducing the total number of separate configuration parameters needed.
3Productivity
If the network device configures and indicates TCI states for PUSCH repeated transmission, then the scheduling efficiency is improved, but the difficulty of detecting and measuring TCI associations increases
Solution Approach 1:
The patent introduces SRS resource sets as intermediary elements between the network device's TCI state configuration and the terminal device's PUSCH transmission. The SRS resource sets act as mediators that carry the TCI state associations from the network side to the terminal side, making the detection and measurement process more straightforward by providing a clear intermediate reference point.
Data Source
AI summary
A wireless communication method includes: receiving, by the terminal device, first indication information. The first indication information is used to indicate a first SRS resource set and a second SRS resource set, both the first SRS resource set and the second SRS resource set are used for a codebook based or non-codebook based PUSCH; where the first SRS resource set is associated with one of K1 TCI states, and the second SRS resource set is associated with one of the K1 TCI states; where the K1 TCI states are currently activated TCI states corresponding to uplink transmission, and K1 is a positive integer.