Fronthaul-aware software-defined joint resource allocation and user scheduling for 5G networks
Liu, Chen-Feng; Samarakoon, Sumudu; Bennis, Mehdi (2017-02-09)
C. Liu, S. Samarakoon and M. Bennis, "Fronthaul-Aware Software-Defined Joint Resource Allocation and User Scheduling for 5G Networks," 2016 IEEE Globecom Workshops (GC Wkshps), Washington, DC, 2016, pp. 1-6. doi: 10.1109/GLOCOMW.2016.7848912
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Software-defined networking (SDN) is the concept of decoupling the control and data planes to create a flexible and agile network, assisted by a central controller. However, the performance of SDN highly depends on the limitations in the fronthaul which are inadequately discussed in the existing literature. In this paper, a fronthaul-aware software-defined resource allocation mechanism is proposed for 5G wireless networks with in-band wireless fronthaul constraints. Considering the fronthaul capacity, the controller maximizes the time-averaged network throughput by enforcing a coarse correlated equilibrium (CCE) and incentivizing base stations (BSs) to locally optimize their decisions to ensure mobile users’ (MUs) quality-of-service (QoS) requirements. By marrying tools from Lyapunov stochastic optimization and game theory, we propose a two-timescale approach where the controller gives recommendations, i.e., sub-carriers with low interference, in a long-timescale whereas BSs schedule their own MUs and allocate the available resources in every time slot. Numerical results show considerable throughput enhancements and delay reductions over a non-SDN network baseline.
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