Frequency Segment Assignment for Uplink Feedback Reduction
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Solution Overview
Problem
Current broadband wireless communication systems face challenges in reducing the enormous uplink throughput required for feedback information, which hampers the improvement of downlink throughput and user data transmission efficiency due to the need for precise communication quality feedback from multiple terminal apparatuses.
Innovation Solution
The base station apparatus assigns frequency segments to terminal apparatuses based on calculated expected values of communication times and quality, limiting feedback to only the assigned segments, using spatial properties and communication capacity statistics to optimize resource allocation and reduce feedback bandwidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If frequency scheduling technology is implemented to dynamically assign frequency segments based on communication quality, then frequency usage efficiency is improved, but the base station requires enormous uplink throughput to receive precise communication quality feedback from every terminal apparatus
Solution Approach 1:
The invention extracts only the necessary feedback information from terminal apparatuses by limiting feedback to specific frequency segments where terminals are actually scheduled to transmit, rather than requiring feedback from all frequency segments. This reduces the feedback information amount while maintaining scheduling effectiveness.
Solution Approach 2:
The invention implements partial feedback action where terminal apparatuses provide communication quality feedback only for a subset of frequency segments (those assigned for transmission) rather than all frequency segments, reducing overall feedback load while preserving scheduling accuracy for active transmissions.
2Measurement precision
If communication quality feedback is collected from all terminal apparatuses for all frequency segments, then scheduling accuracy is improved, but the feedback information amount becomes enormous
Solution Approach 1:
The invention applies local quality feedback where terminal apparatuses report communication quality only for locally relevant frequency segments (those assigned for their transmission) rather than globally all segments. This maintains scheduling accuracy for assigned resources while reducing overall feedback volume.
Solution Approach 2:
The feedback process is segmented into frequency-specific reports where terminals provide quality measurements only for assigned frequency segments rather than a single comprehensive report for all segments, enabling selective collection of necessary quality information.
Data Source
AI summary
A method of wireless communication for communication between a base station and a plurality of terminal apparatuses, the method including: dividing an available frequency into a plurality of segments and notifying control information to the terminal apparatus, the control information including setting of a segment of the plurality of segments, communication quality of which will be fed back by the terminal apparatus, and cancellation of a segment of the plurality of segments, communication quality of which has already been fed back from the terminal apparatus; and feeding back communication quality related to a predetermined segment to the base station in accordance with the control information by the terminal apparatus.