Load Balancing for 5G Ultra-Dense Networks Using Device-to-Device Communications - 2018


Load balancing is an effective approach to address the spatial-temporal fluctuation downside of mobile information traffic for cellular networks. The existing schemes that target channel borrowing from neighboring cells can't be directly applied to the long run 5G wireless networks, as a result of the neighboring cells can reuse the identical spectrum band in 5G systems. In this Project, we have a tendency to contemplate an orthogonal frequency division multiple access ultra-dense tiny cell network, where device-to-device (D2D) communication is advocated to facilitate load balancing while not further spectrum. Specifically, the information traffic will be effectively offloaded from a congested small cell to alternative underutilized little cells by D2D communications. The problem is naturally formulated as a joint resource allocation and D2D routing problem that maximizes the system add-rate. To efficiently solve the problem, we tend to decouple the problem into a resource allocation subproblem and a D2D routing subproblem. The two subproblems are solved iteratively as a monotonic optimization downside and a complementary geometric programming downside, respectively. Simulation results show that the info sum-rate within the neighboring little cells will increase 20percent on average by offloading the information traffic within the congested tiny cell to the neighboring little cell base stations.

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