Midpoint Relay Selection Using Social Trust and Battery Level to Enhance Throughput in Cooperative Device-to-Device...

Area of Science:

• Wireless Communications
• Network Engineering
• Computer Science

Background:

• Device-to-device (D2D) communication in underlay mode enhances cellular spectrum efficiency.
• Relay selection in D2D networks underlaying cellular networks is a critical research area.
• Existing relay selection schemes may suffer performance degradation with varying relay battery power.

Purpose of the Study:

• To propose two novel relay selection schemes: Midpoint Relay Selection using Social Trust and Battery Level (MRS-ST-BL) and Midpoint Relay Selection using Social Distance and Battery Level (MRS-SD-BL).
• To evaluate the performance of these schemes against state-of-the-art methods.
• To analyze the impact of social trust and device density on D2D communication throughput.

Main Methods:

• Development of two new relay selection algorithms incorporating social trust/distance and battery power levels.
• Performance evaluation through simulation, comparing proposed schemes (MRS-ST-BL, MRS-SD-BL) with existing ones (Hybrid Relay Selection - HRS, MRS-ST, MRS-SD).
• Analysis under diverse social trust scenarios and device densities, focusing on throughput.

Main Results:

• Proposed schemes significantly improve D2D communication throughput compared to existing methods.
• Performance gains are particularly notable when relays have differing battery power levels and in weak social trust environments.
• MRS-ST-BL performance demonstrates sensitivity to the battery power threshold.

Conclusions:

• The proposed MRS-ST-BL and MRS-SD-BL schemes offer superior throughput for D2D communications underlaying cellular networks.
• Integrating social trust/distance with battery level information is effective for optimizing relay selection.
• These findings provide valuable insights for designing efficient D2D communication systems.