Frequency Band Resource Scheduling for Narrowband Interference
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communications systems, the use of large bandwidths can lead to decreased transmission rates due to narrowband interference, especially when all sub-bands are utilized, as existing interference reduction methods are ineffective in such scenarios.
Innovation Solution
A frequency band resource scheduling method that selects a sub-band for allocation based on transmission quality, skipping allocation if the quality decrease exceeds a preset value, and calculating the average channel quality indicator (CQI) across all sub-bands to determine the modulation and coding scheme, thereby optimizing resource allocation and avoiding interfered sub-bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large bandwidth is used to improve user experience, then the bandwidth resources are fully utilized, but narrowband interference causes transmission rate to decrease
Solution Approach 1:
The patent segments the frequency band into multiple sub-bands and evaluates each sub-band's transmission quality independently. By dividing the full bandwidth into smaller units, the system can identify and exclude interfered sub-bands while still utilizing non-interfered sub-bands, thus maintaining overall bandwidth utilization while avoiding interference-affected portions.
Solution Approach 2:
The patent applies local quality assessment by evaluating transmission quality specifically for each sub-band rather than treating the entire bandwidth uniformly. This allows the system to allocate resources based on local conditions - assigning sub-bands with good transmission quality while excluding those with poor quality due to narrowband interference.
2Object-affected harmful factors
If sub-band selection is used to avoid narrowband interference, then interference is reduced in partial bandwidth, but all sub-bands must be used in FullBuffer mode making interference reduction ineffective
Solution Approach 1:
The patent implements dynamic sub-band selection that adapts to different buffer conditions. In partial buffer scenarios, the system dynamically selects only high-quality sub-bands for allocation. In FullBuffer mode, it dynamically adjusts by evaluating each sub-band's quality and excluding interfered ones, rather than using a fixed all-or-nothing approach. This dynamic adaptation maintains interference reduction effectiveness across different operating conditions.
Solution Approach 2:
The patent changes the scheduling parameter from a fixed allocation mode to a quality-based selective allocation mode. By introducing transmission quality thresholds and using CQI metrics, the system transforms the rigid FullBuffer scheduling into a flexible quality-driven selection process, allowing interference-affected sub-bands to be excluded even when overall buffer is full.
3Productivity
If all sub-bands are allocated to maximize resource utilization, then bandwidth efficiency is improved, but transmission quality decreases due to including interfered sub-bands
Solution Approach 1:
The patent incorporates feedback mechanisms by using Channel Quality Indicators (CQI) reported by user equipment to inform scheduling decisions. The base station receives CQI feedback for each sub-band and uses this information to make informed allocation decisions, excluding sub-bands with poor quality feedback while allocating those with good quality, thus balancing bandwidth efficiency and transmission quality.
Solution Approach 2:
The patent performs preliminary evaluation of sub-band quality before resource allocation by calculating average CQI for each sub-band and comparing it against thresholds. This preliminary quality assessment allows the system to pre-identify suitable sub-bands for allocation, ensuring that only high-quality sub-bands are selected before the actual resource assignment occurs.
Data Source
AI summary
The present invention discloses a frequency band resource scheduling method and apparatus, where the method includes: first, selecting, according to transmission quality of each to-be-selected sub-band, a sub-band to be allocated to a user terminal; and then, determining whether a transmission quality decreasing amplitude of the user terminal exceeds a first preset value after the selected sub-band is allocated to the user terminal; and if yes, skipping allocating the selected sub-band to the user terminal; otherwise, allocating the selected sub-band to the user terminal.