Carrier Set Grouping for Multichannel CQI Feedback
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Solution Overview
Problem
Current wireless communication systems lack a mechanism for effectively defining and reporting downlink channel quality measurements and feedback to base stations, particularly for multiple carrier frequencies.
Innovation Solution
The implementation of multichannel feedback systems that group downlink carriers into sets based on criteria such as transmission modes and frequency bands, allowing for the measurement and transmission of channel quality indicators (CQI) for each set, enabling efficient channel quality assessment and feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual CQI reports are transmitted for each carrier, then channel quality information is complete and accurate, but feedback overhead and signaling complexity increase significantly
Solution Approach 1:
The patent groups multiple carriers into carrier sets and transmits a single CQI report for each set rather than individual reports for each carrier. This merging approach reduces feedback overhead while maintaining adequate channel quality information through representative carrier selection and set-based aggregation.
Solution Approach 2:
The patent segments carriers into distinct groups or sets based on characteristics such as frequency band, transmission mode, or channel conditions. This segmentation allows for efficient CQI reporting by treating each segment as a unit, reducing the total number of reports needed while preserving necessary granularity for scheduling decisions.
2Measurement precision
If CQI reporting is implemented for multiple carriers, then channel quality assessment improves, but system complexity and processing requirements increase
Solution Approach 1:
The patent combines multiple carrier measurements into aggregated CQI reports for carrier sets, reducing the number of processing operations required compared to handling each carrier individually. This merging simplifies the feedback mechanism while maintaining multi-carrier assessment capability.
Solution Approach 2:
The patent applies different CQI reporting configurations to different carrier sets based on their specific characteristics such as frequency band, transmission mode, or channel conditions. This local quality approach optimizes reporting for each set's requirements while avoiding uniform complexity across all carriers.
3Productivity
If carrier grouping is implemented for CQI reporting, then feedback efficiency improves, but flexibility in handling diverse carrier characteristics is reduced
Solution Approach 1:
The patent employs dynamic carrier set configurations where groups can be formed, modified, or reconfigured based on current system conditions, carrier characteristics, and scheduling requirements. This dynamic approach maintains flexibility while achieving efficient feedback through grouping, allowing the system to adapt to changing conditions without sacrificing reporting efficiency.
Data Source
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AI summary
Systems and methodologies are described that effectuate or facilitate multichannel feedback in multichannel wireless communication environments. In accordance with various aspects set forth herein, systems and/or methods are provided that construct a carrier set, classifies a carrier as belonging to the carrier set, utilizes the carrier as representative of all carriers included in the carrier set to measure a channel quality of the carrier, and transmits a CQI based at least in part of the channel quality of the carrier, wherein the broadcast CQI is representative of all carriers included in the carrier set.