CSI Omission Rules for Multi-Base Station Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving channel state information (CSI) across multiple base stations, particularly in CoMP operations, leading to resource wastage and increased overhead, especially when all CSI parameters are reported for each base station, exceeding the available resource capacity.
Innovation Solution
A method is proposed where CSI is generated based on CSI omission rules, prioritizing certain CSI parameters and grouping subband CSI parameters, allowing for partial or complete omission of CSI, and transmitting it on a single uplink resource, optimizing the reporting container size and resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all CSI parameters are reported for each base station in CoMP operations, then complete channel state information is available for all base stations, but resource capacity is exceeded and overhead increases
Solution Approach 1:
The patent extracts and reports only the most critical CSI parameters (such as CQI, PMI, RI) that are essential for CoMP operations, while omitting less critical parameters. This selective extraction allows the system to maintain necessary information quality while reducing the total quantity of reported data to fit within resource capacity constraints.
Solution Approach 2:
Instead of reporting all possible CSI parameters (excessive action), the patent implements partial reporting by selecting and transmitting only a subset of the most important CSI parameters. This partial action approach ensures that the essential information needed for coordinated multi-point operations is conveyed without exceeding the available uplink resource capacity.
2Reliability
If all CSI parameters are reported for each base station, then comprehensive channel state information is achieved, but overhead increases and resource efficiency decreases
Solution Approach 1:
The patent extracts only the essential CSI parameters that directly impact CoMP operation reliability, such as channel quality indicators and precoding information, while excluding redundant parameters. This extraction maintains the reliability needed for accurate channel state representation while significantly reducing the overhead and improving resource efficiency.
Solution Approach 2:
The patent applies partial reporting by transmitting a selected subset of CSI parameters rather than all parameters. This partial action maintains sufficient reporting accuracy for reliable CoMP operations while reducing the energy and resource consumption associated with transmitting and processing complete CSI datasets.
3Ease of operation
If CSI is transmitted for multiple base stations on separate uplink resources, then each base station receives its dedicated CSI, but resource wastage occurs
Solution Approach 1:
The patent merges the CSI reporting for multiple base stations into a single uplink transmission. By consolidating the CSI parameters for multiple base stations into one unified report, the system eliminates the need for separate uplink resources for each base station, thereby reducing resource wastage while maintaining the ability to deliver dedicated CSI information to each base station through appropriate signaling and mapping.
Data Source
AI summary
The present disclosure provides a method for transmitting and receiving channel state information (CSI) in a wireless communication system and a device supporting the same.Particularly, a method for reporting channel state information (CSI) performed by a user equipment (UE) supported by multiple base stations in a wireless communication system may include receiving CSI related configuration information for the multiple base stations; receiving a reference signal from the multiple base stations; generating CSI based on a CSI omission rule; and transmitting the CSI to at least one base station among the multiple base stations, wherein the CSI may include information for multiple channels configured, and wherein the CSI omission rule may be determined based on at least one of i) a type of the CSI, ii) a part of the CSI, iii) priority information among CSI parameters and/or iv) priority information among the multiple base stations.