Cell-Edge UE Frequency Allocation for Interference Reduction
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Solution Overview
Problem
In wireless communication systems, co-channel interference between user equipment (UEs) near each other reduces communication quality, especially for UEs at the cell edge that transmit at high power to enhance signal reach, leading to system performance degradation.
Innovation Solution
Classifying UEs into cell-center and cell-edge categories based on their location and allocating specific frequency ranges to each category to minimize interference, with dynamic reclassification of UEs based on performance indicators to optimize bandwidth usage and reduce co-channel interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If cell-edge UEs transmit at high power to enhance signal reach, then signal coverage is improved, but co-channel interference increases
Solution Approach 1:
The patent segments the cell area into cell-center and cell-edge regions, and allocates different frequency ranges to each segment. Cell-edge UEs are assigned a first frequency range while cell-center UEs are assigned a second frequency range, reducing co-channel interference while maintaining signal coverage for distant UEs.
Solution Approach 2:
The patent applies different frequency allocation strategies to different spatial locations within the cell. Cell-edge UEs receive a specific frequency range optimized for their location, while cell-center UEs receive a different frequency range, allowing each region to operate with locally optimized parameters that reduce interference.
2Object-generated harmful factors
If frequency ranges are allocated to reduce interference, then co-channel interference is reduced, but bandwidth utilization efficiency decreases
Solution Approach 1:
The patent implements dynamic reclassification of UEs between cell-center and cell-edge categories based on performance indicators. When a cell-edge UE's performance improves above a threshold, it is reclassified to cell-center, allowing it to access the broader second frequency range, thus dynamically optimizing bandwidth utilization while maintaining interference reduction.
Solution Approach 2:
The system monitors performance indicators of cell-edge UEs and uses this feedback to determine when to reclassify them to cell-center. This feedback mechanism ensures that frequency resources are dynamically adjusted based on actual channel conditions and UE performance, optimizing both interference reduction and bandwidth efficiency.
Data Source
AI summary
In an embodiment, a wireless communication system (100, FIG. 1) includes one or more nodes (102-108) and one or more user equipments (UE) (130-134). A node may service a cell (110-116). A UE may be classified (802, FIG. 8) into a cell-edge UE group when the UE is within in a cell-edge region (504, 506, 508, FIG. 5) of a cell. The cell-edge UE group may be allocated at least one first frequency range within an available bandwidth (600, 700, FIGS. 6 and 7). A UE may be reclassified (808, FIG. 8) into a cell-center UE group based on at least one indicator of UE performance. The cell-center UE group may be allocated at least one second frequency range within the available bandwidth.