OFDM Access Point D2D Scheduling Control
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Solution Overview
Problem
OFDM communication systems face interference issues due to inefficient resource allocation for Device-to-Device (D2D) communications, leading to degradation of communication quality.
Innovation Solution
The OFDM access point schedules D2D resources in a shared resource range initially, but upon detecting excessive interference, it allocates D2D resources in a dedicated resource sub-range to mitigate interference, thereby maintaining communication quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If D2D resources are allocated in a shared resource range, then resource utilization efficiency is improved, but interference between D2D UEs and regular UEs increases
Solution Approach 1:
The resource spectrum is segmented into two distinct parts: a shared resource range for regular UE communications and a D2D dedicated resource sub-range for D2D communications. This segmentation allows the system to maintain high resource utilization by having a shared pool while preventing interference through dedicated allocation when needed.
Solution Approach 2:
The system dynamically adjusts resource allocation based on detected interference levels. When D2D interference exceeds a threshold, the access point transitions from allocating resources in the shared range to allocating them in the dedicated sub-range, creating an adaptive resource management system that responds to changing conditions.
2Object-affected harmful factors
If D2D resources are allocated in a dedicated resource sub-range, then interference is reduced, but resource utilization efficiency decreases
Solution Approach 1:
The resource spectrum is segmented into two distinct parts: a shared resource range for regular UE communications and a D2D dedicated resource sub-range for D2D communications. This segmentation allows the system to maintain high resource utilization by having a shared pool while preventing interference through dedicated allocation when needed.
Solution Approach 2:
The system changes the allocation parameter (resource range selection) based on interference conditions. When interference is low, resources are allocated in the shared range for maximum utilization; when interference exceeds thresholds, the allocation parameter switches to the dedicated sub-range, optimizing the trade-off between utilization and interference management.
3Reliability
If the OFDM access point controls and schedules D2D communications, then communication quality is maintained, but scheduling complexity increases
Solution Approach 1:
The access point implements a feedback-based scheduling mechanism where it detects D2D interference levels and uses this information to make intelligent scheduling decisions. This feedback loop allows the system to maintain communication quality by adjusting resource allocation based on actual channel conditions while keeping the scheduling logic relatively simple through threshold-based decision making.
Data Source
AI summary
An Orthogonal Frequency Division Multiplexing (OFDM) communication network controls Device-to-Device (D2D) scheduling. The OFDM access point wirelessly exchanges wireless communications with a plurality of individual User Equipment (UEs) using scheduled UE resources in a shared resource range. The OFDM access point wirelessly receives a first D2D communication request for a first D2D UE and responsively schedules D2D resources for the first D2D communication request in the shared resource range. The OFDM access point detects D2D interference for one of the plurality of individual UEs and determines that the D2D interference exceeds a D2D interference threshold. The OFDM access point wirelessly receives a second D2D communication request for a second D2D UE and responsively schedules D2D resources for the second D2D communication request in a D2D dedicated resource sub-range.