Multi-TRP SRI Configuration for DCI Beam Management
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Solution Overview
Problem
In multi-TRP scenarios, the specific configuration solution for the SRI indication field in DCI is not defined, hindering efficient channel quality detection and beam management.
Innovation Solution
A method and apparatus for determining configuration information for the SRI indication field in DCI based on SRS resource set configuration, including the number of SRS resources and the function type (codebook or non-codebook) for each TRP, to facilitate SRS resource selection and precoding in multi-TRP scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple SRS resource sets are configured for multiple TRPs, then channel quality detection and beam management capabilities are improved, but the complexity of SRI indication field configuration increases
Solution Approach 1:
The patent segments the SRS resource sets into multiple groups, where each group corresponds to a specific TRP. The SRI indication field is accordingly segmented to indicate different SRS resource sets for different TRPs. This segmentation allows the system to maintain multiple SRS resource sets for improved channel quality detection while managing the configuration complexity through structured organization.
Solution Approach 2:
The patent introduces a new dimension for SRI indication by configuring multiple SRI indication fields (first SRI indication field and second SRI indication field) corresponding to different TRPs. This dimensional expansion allows independent indication of SRS resources for each TRP, resolving the complexity issue by providing a systematic multi-dimensional indication approach.
2Adaptability or versatility
If SRS resource sets are configured for multiple TRPs with different functions, then transmission adaptability is improved, but the configuration complexity increases
Solution Approach 1:
The patent configures SRS resource sets that can serve multiple functions - they can be used for codebook-based transmission or non-codebook-based transmission depending on the configuration. The same SRS resource set configuration structure is universally applied across multiple TRPs, allowing flexible adaptation to different transmission modes while maintaining consistent configuration management.
Solution Approach 2:
The patent utilizes parameter changes in the SRS resource set configuration to indicate different function types (codebook or non-codebook). By changing specific configuration parameters, the system can adapt the SRS resource sets for different transmission modes without requiring entirely separate configuration structures, thereby improving adaptability while controlling complexity.
3Measurement precision
If independent SRI indication fields are configured for each TRP, then beam management precision is improved, but the DCI overhead increases
Solution Approach 1:
The patent segments the beam management indication into multiple independent SRI indication fields, where each field corresponds to a specific TRP. This segmentation enables precise beam management for each TRP independently while allowing the system to manage DCI overhead through selective activation and configuration of each segment based on actual transmission needs.
Data Source
AI summary
A method for transmission configuration for multiple transmission reception points (TRPs) is performed by a network device, wherein the multiple TRPs include a first TRP and a second TRP, and the method includes: determining configuration information for a sounding reference signal (SRS) resource indicator (SRI) indication field in downlink control information (DCI) according to SRS resource set configuration information of the first TRP and the second TRP; wherein the SRS resource set configuration information indicates a number of SRS resources included in a first SRS resource set corresponding to the first TRP and a number of SRS resources included in a second SRS resource set corresponding to the second TRP, and indicates whether the first SRS resource set and the second SRS resource set are used for a codebook function or a non-codebook function.