An Interference Mitigation Scheme of Device-to-Device Communications for Sensor Networks Underlying LTE-A

Area of Science:

• Wireless communication networks
• Telecommunications engineering
• Signal processing

Background:

• Device-to-Device (D2D) communication is crucial for wireless sensor networks, enabling direct device links.
• Existing D2D research has not fully addressed data rate shortages and limited coverage.
• D2D in cellular networks faces radio resource management challenges, particularly interference.

Purpose of the Study:

• To propose a hybrid mechanism to mitigate inter-cell interference impacting D2D receivers (DUE-Rxs) in cellular networks.
• To enhance the Signal-to-Interference-plus-Noise Ratio (SINR) for D2D receivers at the cell edge.
• To improve overall system throughput in D2D-enabled cellular environments.

Main Methods:

• A hybrid interference mitigation scheme combining Fractional Frequency Reuse (FFR) and Almost Blank Sub-frame (ABS).
• Focusing on D2D receivers (DUE-Rxs) as victim nodes and cellular user equipments (CUEs) as aggressor nodes.
• Analyzing interference reduction and SINR improvement for D2D receivers at the cell edge.

Main Results:

• The proposed hybrid FFR and ABS scheme significantly reduces interference at the cell edge compared to conventional FFR.
• The Signal-to-Interference-plus-Noise Ratio (SINR) for target D2D receivers (DUE-Rxs) is substantially improved.
• System throughput increased by up to 60% compared to the conventional FFR method.

Conclusions:

• The hybrid FFR and ABS mechanism effectively manages radio resources to minimize inter-cell interference in D2D cellular networks.
• This approach enhances the performance of D2D communication, particularly for cell-edge users.
• The proposed scheme offers a significant improvement in both interference mitigation and system throughput.