Interference Status Report for Mobile Network Secondary Stations
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Solution Overview
Problem
In mobile communication systems like UMTS and LTE, secondary stations lack comprehensive knowledge of their interference environment, leading to inefficient data rate estimation and increased overhead in feedback reporting.
Innovation Solution
The primary station signals an interference status report to secondary stations, including spatial, temporal, and frequency characteristics, with separate indications for uniform and localized interference sources, allowing secondary stations to better understand and mitigate interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If secondary stations compute feedback based on local measurements only, then device complexity is reduced, but measurement precision and interference awareness deteriorate
Solution Approach 1:
The patent introduces an interference status report as an intermediary information carrier that bridges the gap between primary station's network-wide interference knowledge and secondary station's local measurements. This report contains spatial, temporal, and frequency characteristics of interference, allowing secondary stations to improve their measurement precision without significantly increasing their processing complexity.
2Measurement precision
If secondary stations report detailed channel quality information, then data rate estimation accuracy is improved, but communication overhead increases
Solution Approach 1:
The patent applies preliminary action by having the primary station pre-compute and signal the interference status report to secondary stations before they perform their data rate estimation. This pre-provided interference information allows secondary stations to make more accurate estimations without needing to report extensive raw measurement data, thereby reducing feedback overhead while maintaining or improving accuracy.
3Productivity
If primary station provides comprehensive interference information to all secondary stations, then system-wide communication efficiency is improved, but signaling overhead increases
Solution Approach 1:
The patent applies local quality by tailoring the interference status report content to the specific needs of each secondary station. The report includes spatial, temporal, and frequency characteristics that are relevant to each station's local interference environment. This allows comprehensive interference information to be provided to each secondary station in a customized, compact form, improving system-wide communication efficiency while controlling signaling overhead through selective information provision.
Data Source
AI summary
The present invention relates to a method for operating a secondary station comprising means for communicating with a primary station, the method comprising receiving from the primary station an interference status report, said interference status report comprising an spatial indication being representative of a spatial characteristic of the interference, measuring channel characteristics on reference symbols, and interpreting the measured channel characteristics with help of the interference status report.