CSI Report Configuration via Port Group Segmentation
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently configuring Channel State Information (CSI) reports, particularly in multi-transmission and reception point (TRP) networks, which leads to increased control signaling and feedback overhead.
Innovation Solution
The method involves receiving a CSI reporting setting and a non-zero power (NZP) CSI reference signal (RS) resource at a user equipment (UE), decomposing the NZP CSI-RS resource into CSI-RS port groups associated with code division multiplexing (CDM) groups, and transmitting CSI reports that indicate a selected subset of these port groups.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If CSI reports include all CSI-RS port groups in multi-TRP networks, then measurement precision is improved, but feedback overhead increases
Solution Approach 1:
The patent segments the CSI-RS port groups into multiple subsets and configures multiple CSI reporting settings, each associated with a different subset. The UE selectively reports CSI for only one subset at a time based on triggering, rather than reporting all port groups continuously. This segmentation reduces the quantity of feedback information while maintaining measurement precision through selective reporting of relevant subsets.
Solution Approach 2:
The patent implements partial action by having the UE report CSI for only a selected subset of CSI-RS port groups rather than all port groups. The network configures multiple CSI reporting settings with different subsets, and only the necessary subset is reported based on current transmission requirements, reducing overall feedback overhead while maintaining sufficient measurement precision for active TRPs.
2Adaptability or versatility
If multiple CSI reporting settings are configured for different CSI-RS port groups, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent creates multiple CSI reporting settings that are universally structured but differentiated by their associated CSI-RS resource subsets. Each reporting setting follows the same configuration format and reporting mechanism, allowing the UE to handle them through a unified process. This multi-functionality approach enables the system to adapt to different TRP scenarios while maintaining consistent UE operation, reducing perceived complexity despite multiple configurations.
Solution Approach 2:
The network pre-configures multiple CSI reporting settings with different CSI-RS resource subsets before actual CSI reporting occurs. The UE stores these pre-configured settings and selectively activates them based on network triggering. This preliminary configuration action reduces real-time decision complexity at the UE, as the selection logic is simplified to choosing among pre-prepared options rather than dynamically creating reports.
3Quantity of substance
If selective subset reporting is implemented, then feedback overhead is reduced, but information completeness may be compromised
Solution Approach 1:
The patent implements dynamic CSI reporting where the UE selectively reports different subsets of CSI-RS port groups based on current network conditions and transmission requirements. The network can trigger reporting of specific subsets as needed, making the feedback information dynamically adapted to current needs. This dynamic approach reduces overall feedback overhead while ensuring information completeness for active transmissions, as only currently relevant TRP subsets are reported.
Solution Approach 2:
The patent establishes a feedback mechanism where the network triggers CSI reporting for specific subsets based on current transmission requirements. The UE provides feedback on selected subsets, and the network uses this feedback to make informed transmission decisions. This feedback loop ensures that while not all port groups are reported continuously, the necessary information is obtained on-demand, maintaining information completeness for active TRPs while reducing overall feedback overhead through selective reporting.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for configuring a channel state information (“CSI”) report. One method includes receiving, at a user equipment (“UE”), a CSI reporting setting. The method includes receiving a non-zero power (“NZP”) CSI reference signal (“RS”) (“CSI-RS”) resource for channel measurement (“CMR”). The NZP CSI-RS resource is decomposed into a plurality of CSI-RS port groups, and each CSI-RS port group is associated with at least one CDM group. The method includes transmitting at least one CSI report based on the received NZP CSI-RS resource. The at least one CSI report includes an indication of a selected subset of the plurality of CSI-RS port groups.