5G Interference Measurement for Large-Array CSI Reporting
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Solution Overview
Problem
Existing channel quality reporting processes in wireless communications systems do not adequately accommodate large, two-dimensional array transmit antennas or antenna array geometries with a large number of elements, limiting effective channel state information reporting.
Innovation Solution
Implement methods and apparatuses for channel and interference measurement in 5G communication systems, utilizing multi-beam operation with analog and digital beamforming to support higher data rates and improved reporting capabilities, especially for systems with large antenna arrays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing channel quality reporting processes are used, then the system operates with standard antenna configurations, but it cannot adequately accommodate large two-dimensional array transmit antennas or antenna arrays with a large number of elements
Solution Approach 1:
The patent divides the large antenna array into multiple sub-arrays or groups, each associated with specific reference signals. This segmentation allows the system to handle large antenna configurations by breaking them down into manageable units that can be independently measured and reported, resolving the contradiction between accommodating large arrays and managing system complexity
Solution Approach 2:
The patent introduces a new dimension for channel quality reporting by implementing multi-beam operation with analog and digital beamforming. This adds spatial dimensionality to the reporting mechanism, enabling the system to accommodate large two-dimensional antenna arrays by measuring channel quality across multiple beams and directions rather than treating the array as a single entity
2Adaptability or versatility
If multi-beam operation with analog and digital beamforming is implemented, then channel quality reporting accommodates large antenna arrays, but the system complexity and measurement overhead increase
Solution Approach 1:
The patent segments the beamforming operations into analog beamforming at the RF front-end and digital beamforming in the baseband processing. This division allows each layer to be optimized independently, reducing overall system complexity while maintaining the ability to support large antenna arrays through coordinated multi-beam operation
Solution Approach 2:
The patent designs the beamforming system to perform multiple functions: analog beamforming handles spatial filtering and signal direction, while digital beamforming enables precise channel estimation and quality measurement. This multi-functionality allows a single system architecture to accommodate large antenna arrays without proportionally increasing complexity
3Measurement precision
If interference measurement is performed with multiple interference hypotheses, then channel state information accuracy improves, but the measurement time and processing overhead increase
Solution Approach 1:
The patent performs preliminary interference measurement by configuring multiple interference measurement resources (IMRs) that pre-characterize different interference hypotheses. By preparing these measurements in advance rather than computing them in real-time, the system achieves high channel state information accuracy while reducing the time penalty during actual data transmission
Solution Approach 2:
The patent implements a selective approach where not all interference hypotheses are measured with equal depth. Instead, the system identifies dominant interference sources and focuses measurement resources on those hypotheses most likely to impact channel quality, achieving sufficient accuracy without the excessive time cost of measuring all possible hypotheses
Data Source
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AI summary
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). Methods and apparatuses for channel and interference measurement. A method for operating user equipment (UE) includes receiving, from a base station, configuration information for a channel measurement resource (CMR) and N interference measurement resources (IMRs) and configuration information for a channel state information (CSI) reporting. The CSI reporting configuration information indicates a selection of a signal-to-interference-plus-noise ratio (SINR). The method further includes receiving reference signals associated with the CMR and the N IMRs, measuring the reference signals for calculating the CSI reporting, and transmitting the CSI reporting. The CSI reporting includes M SINRs each associated with an interference hypothesis. N is an integer greater than or equal to 2. M is an integer greater than or equal to 1. The CMR is a synchronization signal block (SSB) or a non-zero power channel state information reference signal (NZP CSI-RS). The N IMRs are NZP CSI-RSs.