On the Performance of Mutual-Aid NOMA Strategy in Cooperative Networks

Non-orthogonal multiple access (NOMA) has attracted a great deal of interests due to its potential contributions to the 5th generation (5G) mobile networks. In this letter, a mutual-aid NOMA strategy, which aims to reduce the computational burdens at the near-end users and improve the coverage of the high quality service to the edge users, is designed for the cooperative networks. The performances of the outage probability and computational burden of the users in mutual-aid NOMA clusters are evaluated, respectively. The results show that the computing complexity and the coverage issues can be efficiently improved by using the cooperative mutual-aid NOMA.