  The robustness of system throughput with scheduling is a critical issue. In
this paper, we analyze the sensitivity of multi-user scheduling performance to
channel misreporting in systems with massive antennas. The main result is that
for the round-robin scheduler combined with max-min power control, the channel
magnitude misreporting is harmful to the scheduling performance and has a
different impact from the purely physical layer analysis. Specifically, for the
homogeneous users that have equal average signal-to-noise ratios (SNRs),
underreporting is harmful, while overreporting is beneficial to others. In
underreporting, the asymptotic rate loss on others is derived, which is tight
when the number of antennas is huge. One interesting observation in our
research is that the rate loss "periodically" increases and decreases as the
number of misreporters grows. For the heterogeneous users that have various
SNRs, both underreporting and overreporting can degrade the scheduler
performance. We observe that strong misreporting changes the user grouping
decision and hence greatly decreases some users' rates regardless of others
gaining rate improvements, while with carefully designed weak misreporting, the
scheduling decision keeps fixed and the rate loss on others is shown to grow
nearly linearly with the number of misreporters.
