NOMA-Based Uncoded Video Transmission With Optimization of Joint Resource Allocation

The non-orthogonal multiple access (NOMA) technique has demonstrated potential for the multicast of multiple videos. However, it simply multiplexes limited number of signals in each single channel and cannot satisfy different video quality requirements of multiple users. To resolve this problem, we construct the NOMA-based uncoded multi-user video transmission (NOMA-UMVT) system in which the allocation of power and channel resources to all the users is jointly optimized to guarantee high video quality. Specifically, we first implement the power allocation of multiuser by converting it into the inter-channel and intra-channel allocation sub-problems. After solving these sub-problems for power allocation, we assign channels with the proposed two-staged channel assignment algorithm. The simulation results demonstrate the superior performance of our proposed NOMA-UMVT system when it is applied to transmit videos to multiple users.