CSI Component Prioritization for Coherent Joint Transmission
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Solution Overview
Problem
In wireless communication systems, the allocation of resources for channel state information (CSI) reporting via the physical uplink shared channel (PUSCH) is often insufficient, particularly for coherent joint transmission (CJT) scenarios, leading to incomplete CSI reports due to variable payload sizes, which affects network performance.
Innovation Solution
A method and apparatus for a user equipment (UE) to prioritize and omit CSI components based on a TRP priority rule when resource allocation is insufficient, ensuring that the remaining CSI components are transmitted effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits a complete CSI report for CJT, then the network node can obtain accurate channel state information, but the allocated PUSCH resources are insufficient to accommodate the variable payload size
Solution Approach 1:
The patent extracts and omits specific CSI components from the CSI report based on a determination of available PUSCH resources. The network node identifies which CSI components to include or omit, effectively removing unnecessary data elements to fit the resource constraints while maintaining essential reporting functionality.
Solution Approach 2:
The patent dynamically adjusts the payload size parameter of the CSI report by selectively including or omitting CSI components. This parameter change allows the report to adapt to varying PUSCH resource allocations, transforming a fixed-size reporting structure into a flexible one that matches available resources.
2Quantity of substance
If the UE omits CSI components to fit resource allocation, then the PUSCH resources are sufficient for transmission, but the CSI report becomes incomplete
Solution Approach 1:
The network node performs preliminary determination of which CSI components to include in the report before transmission. By pre-identifying the necessary components based on resource constraints, the system ensures that only essential information is transmitted, avoiding both over-allocation and information loss.
Solution Approach 2:
The patent implements partial reporting by transmitting only a subset of available CSI components rather than the complete report. This partial action is sufficient to meet the resource constraints while maintaining the essential functionality of channel state feedback.
3Device complexity
If the network node allocates fixed PUSCH resources for CSI reporting, then resource management is simplified, but the variable payload size of CSI Part 2 cannot be accommodated
Solution Approach 1:
The patent introduces dynamic resource allocation where the network node adjusts the allocation of PUSCH resources based on the actual payload size of the CSI report. This dynamic approach transforms fixed resource allocation into a flexible system that adapts to varying reporting requirements while maintaining manageable complexity through structured determination procedures.
Data Source
AI summary
A method for wireless communication by a user equipment (UE) includes receiving a message scheduling a physical uplink shared channel (PUSCH). The method also includes determining that a quantity of resources allocated for channel state information (CSI) reporting via the PUSCH is insufficient for transmitting a CSI report for a coherent joint transmission (CJT) associated with transmit and receive points (TRPs). Each TRP may be associated with a set of CSI components. The method further includes prioritizing the CSI components based on a TRP priority rule. The method still further includes omitting one or more CSI components from the prioritized CSI components. The method also includes transmitting, to one or more TRPs, the CSI report comprising remaining CSI components based on omitting the one or more CSI components.