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Delay Based Subcarrier and VM Scheduling for Multi-cell Cellular Edge Computing Systems

This paper studies the resource scheduling problem for multi-cell cellular edge computing systems. Firstly, the analytical formulas of the communication delay and computing delay in multi-cell cellular edge computing systems are derived and expressed as virtual delay queues. Then, a delay based Lyapunov function is defined and a novel backpressure based subcarrier and virtual machine (VM) scheduling algorithm is proposed which stabilizes the virtual delay queues. Simulation results show that the total delay of the proposed scheduling algorithm is always lower than that of the queue length based traditional scheduling algorithm.