timetiple of R - Downlink : the number of allocated slots(Ns) Ns = [ R*K, R*K + (R – 1) ] - R(repeated ... . The support of 64-QAM is optional for license-exempt bands.Adaptive Modulation and Coding (AMC) 16 ... ubchannels for multiple access – Improved capacity – Improved scheduling and QoS support – Reduced