Adaptive CSI Payload Compression for Limited Wireless Resources
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) due to resource allocation limitations, leading to performance degradation when the CSI size exceeds allocated resources.
Innovation Solution
A method for compressing or omitting CSI by reducing specific parameters, such as the rank indicator (RI), channel quality indicator (CQI), and precoding matrix indicator (PMI), when the resource capacity is insufficient, allowing the user equipment (UE) to adaptively adjust the CSI payload to fit within the allocated resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE transmits full CSI payload including all parameters (RI, CQI, PMI) with high precision, then the measurement precision and reliability of channel state information is improved, but the resource allocation capacity is exceeded causing transmission failure or resource shortage
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the precision and granularity of CSI parameters (RI, CQI, PMI) based on available resource capacity. When resources are limited, the UE reduces the payload size by decreasing parameter precision or selecting from a reduced set of parameter values, thereby fitting the CSI within allocated resources while maintaining acceptable measurement quality
Solution Approach 2:
The patent implements partial action by selectively transmitting only the most critical CSI parameters or a subset of parameter values when resource capacity is insufficient. The UE determines which parameters to include or exclude from the CSI report based on resource constraints, transmitting a partial but sufficient set of channel state information rather than the complete high-precision set
2Quantity of substance
If the UE reduces CSI payload size by compressing or omitting parameters to fit allocated resources, then the resource allocation capacity is satisfied ensuring successful transmission, but the measurement precision and reliability of channel state information deteriorates
Solution Approach 1:
The patent uses parameter changes to balance resource constraints with measurement quality. The UE adjusts parameter precision dynamically - using full precision when resources allow and reduced precision when resources are limited - thereby optimizing the trade-off between payload size and measurement accuracy based on available resource capacity
Solution Approach 2:
The patent implements feedback mechanisms where the UE monitors resource allocation capacity and adjusts CSI reporting parameters accordingly. The system provides feedback on resource availability and transmission outcomes, allowing the UE to learn and adapt its parameter selection strategy to maintain acceptable measurement precision within resource constraints
3Reliability
If the UE transmits detailed CSI with multiple parameters for accurate channel representation, then the reliability of communication is improved, but the complexity of the transmission process and processing overhead increases
Solution Approach 1:
The patent applies dynamics by making the CSI transmission process adaptive rather than static. The UE dynamically adjusts the level of detail and number of parameters transmitted based on real-time resource allocation and channel conditions, optimizing the balance between reliability and complexity for each transmission instance rather than using a fixed approach
4Quantity of substance
If the UE compresses CSI by omitting parameters to reduce payload size, then the resource allocation capacity is satisfied, but the loss of information in channel state representation increases
Solution Approach 1:
The patent uses parameter changes to minimize information loss while satisfying resource constraints. The UE selectively adjusts which parameters are compressed or omitted based on their relative importance to channel representation, preserving critical information while reducing less critical parameters to fit within allocated resource capacity
Data Source
AI summary
The present invention relates to a method whereby user equipment (UE) transmits channel state information (CSI) in a wireless communication system and to a device therefor. According to the present invention, a terminal receives configuration information for CSI reporting from a base station and receives a reference signal from the base station on the basis of the configuration information. The terminal may receive downlink control information (DCI) via a physical downlink control channel (PDCCH), calculate CSI about a particular channel on the basis of the configuration information and the DCI, and report same to the base station.