Multi-TRP Beam Management Using CSI-RS Port-Group Configuration
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Solution Overview
Problem
Existing wireless communication technologies, such as 5G NR, face challenges in effectively managing beams in multi-TRP scenarios due to limitations in channel state information reference signal (CSI-RS) configurations, which hinder optimal reception beam determination across multiple transmission reception points.
Innovation Solution
The proposed solution involves providing a UE with a CSI-RS resource configuration that includes resources corresponding to multiple DMRS-port-groups associated with different TRPs, along with control signaling for quasi-colocation (QCL) information and DMRS-port-group indications, enabling the UE to determine preferred reception beams for improved communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing CSI-RS configurations are used in multi-TRP scenarios, then device complexity is reduced, but beam management precision deteriorates
Solution Approach 1:
The patent segments the CSI-RS configuration into multiple DMRS-port-groups, where each group is associated with a specific TRP. This segmentation allows the UE to independently measure and determine reception beams for each TRP, thereby improving beam management precision in multi-TRP scenarios while maintaining manageable configuration complexity through structured organization.
Solution Approach 2:
The patent introduces a new dimension to CSI-RS configuration by associating multiple DMRS-port-groups with different TRPs. This dimensional extension enables the system to handle multi-TRP scenarios by adding TRP identification as an additional layer to the existing single-TRP configuration, improving beam management capability without fundamentally redesigning the entire configuration framework.
2Measurement precision
If multiple DMRS-port-groups are configured for different TRPs, then reception beam determination accuracy is improved, but control signaling overhead increases
Solution Approach 1:
The patent applies preliminary action by configuring multiple DMRS-port-groups in advance, each associated with a specific TRP. This allows the UE to pre-determine reception beams for each TRP before actual data transmission, improving reception beam determination accuracy while reducing real-time control signaling overhead by performing beam determination beforehand.
3Reliability
If CSI-RS resources are associated with multiple TRPs, then communication reliability is improved, but configuration complexity increases
Solution Approach 1:
The patent segments CSI-RS resources into multiple DMRS-port-groups, with each group associated with a specific TRP. This segmentation improves communication reliability by enabling the UE to determine optimal reception beams for each TRP independently, while the structured segmentation approach keeps configuration complexity manageable through organized grouping.
Solution Approach 2:
The patent creates a universal CSI-RS configuration framework that can handle both single-TRP and multi-TRP scenarios through the DMRS-port-group association mechanism. This multi-functional configuration approach improves communication reliability in multi-TRP scenarios while maintaining compatibility with existing single-TRP configurations, avoiding the need for completely separate configuration systems.
Data Source
AI summary
Aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for beam management in multi-TRP scenarios. An exemplary method generally includes receiving a channel state information reference signal (CSI-RS) resource configuration from at least one base station (BS) for one or more transmission hypotheses, wherein the CSI-RS resource configuration includes CSI-RS resources corresponding to at least a first downlink (DL) demodulation reference signal (DMRS)-port-group and a second DL DMRS-port-group, performing one or more CSI-RS measurements for the one or more transmission hypotheses based, at least in part on the CSI-RS resource configuration, and determining, for each of the one or more transmission hypotheses, a preferred reception beam for communicating with the at least one BS based, at least in part, on the one or more CSI-RS measurements.