Feedback Reduction for Queue-aware Coordinated Multi-user Scheduling in Small-cell Networks

We investigate the problem of feedback reduction for queue-aware coordinated multi-user scheduling in small cell networks (SCNs). An adaptive distributed channel state information (CSI) feedback framework based on users' channel state, queue length as well as total user number is proposed. Two specific feedback algorithms are also presented within the framework. Simulation results show that our algorithm greatly reduces feedback overhead and guarantees the system performance at the same time. Besides, the proposed feedback algorithms can also be used in energy efficient coordinated multi-cell multi-user scheduling algorithms.

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