  This paper considers non-orthogonal multiple access (NOMA) assisted mobile
edge computing (MEC), where the power and time allocation is jointly optimized
to reduce the energy consumption of offloading. Closed-form expressions for the
optimal power and time allocation solutions are obtained and used to establish
the conditions for determining whether conventional orthogonal multiple access
(OMA), pure NOMA or hybrid NOMA should be used for MEC offloading.
