Performance of User Grouping Schemes in Collaborative MIMO Reception with a Focus on User Fairness

This paper proposes user equipment (UE) grouping schemes that take user fairness into account in collaborative multiple-input multiple-output reception. In previous research, the criterion for UE grouping to improve system throughput is proposed. However, the user fairness is deteriorated if these schemes focus on the system throughput. In this paper, the range of the received signal power is restricted to reduce the difference among user throughput. Numerical results obtained through computer simulation show that there is a trade-off relationship between the user throughput and the user fairness via the range of the received signal power.