  This letter considers the development of transmission strategies for the
downlink of massive multiple-input multiple-output networks, with the objective
of minimizing the completion time of the transmission. Specifically, we
introduce a session-based scheme that splits time into sessions and allocates
different rates in different sessions for the different users. In each session,
one user is selected to complete its transmission and will not join subsequent
sessions, which results in successively lower levels of interference when
moving from one session to the next. An algorithm is developed to assign users
and allocate transmit power that minimizes the completion time. Numerical
results show that our proposed session-based scheme significantly outperforms
conventional non-session-based schemes.
