Joint Power Control and Resource Allocation for Optimizing the D2D User Performance of Full-Duplex D2D Underlying...

Area of Science:

• Wireless communication networks
• Signal processing
• Optimization theory

Background:

• Device-to-Device (D2D) communication offers enhanced spectral efficiency (SE) in cellular networks.
• Full-duplex (FD) technology has the potential to double SE by enabling simultaneous transmission and reception.
• Integrating FD into D2D (FD-D2D) underlaying cellular networks can further improve SE, but faces challenges from residual self-interference (RSI) and inter-user interference.

Purpose of the Study:

• To propose an FD-D2D system underlaying a cellular network where D2D users (DUs) share uplink and downlink resources with cellular users (CUs).
• To develop algorithms for enhancing DU performance and system SE by addressing optimization problems related to power control and spectral resource allocation.
• To improve the performance experience of DUs while simultaneously increasing the overall system SE.

Main Methods:

• Formulated a sum rate maximization problem for FD-DUs as a Mixed-Integer Nonlinear Programming (MINLP) problem, decomposed into power control (solved via 1D searching) and spectral resource allocation (solved using Kuhn-Munkres algorithm).
• Developed a second algorithm to maximize the minimum rate among FD-DUs, employing bisection searching and the Kuhn-Munkres algorithm for spectral resource allocation, with consistent power control.
• Addressed complex optimization challenges including NP-hard problems and nonlinear equations inherent in FD-D2D resource management.

Main Results:

• The proposed algorithms effectively enhance DU performance in FD-D2D underlaid cellular networks.
• Numerical results show superior performance compared to traditional sum rate maximization designs.
• The algorithms successfully manage RSI and spectrum sharing interference to improve user experience and SE.

Conclusions:

• The developed algorithms provide effective solutions for optimizing FD-D2D communication within cellular networks.
• The study demonstrates the feasibility and benefits of integrating FD-D2D with joint resource sharing.
• Future work could explore advanced interference mitigation techniques and dynamic resource allocation strategies.