Performance of a hybrid dual-hop and multi-hop network based on NOMA

In this work, a novel network is proposed, which supports simultaneous dual-hop and multi-hop transmissions using the key concept of non-orthogonal multiple access (NOMA). The proposed network is designed in such a way that the existing infrastructure of a multi-hop network can be utilised efficiently for concurrent dual-hop transmissions. While one source transmits its signal to a remote destination via N relay nodes in (N + 1) time slots, a maximum of another N sources may transmit their information to the corresponding N destinations using dual-hop transmissions via the same N relay nodes over (N + 2) time slots. The performance of this hybrid dual-hop/multi-hop network is analysed and the impact of number of hops, transmit signal-to-noise ratio (SNR) and imperfection of successive interference cancellation (SIC) on the outage performance of each source is evaluated. Novel closed-form expressions for outage probability and ergodic capacity have been developed to assess the performance of the proposed network. In addition, an asymptotic performance analysis has also been also carried out for both outage probability and ergodic capacity of the proposed network.

Automated summary

In this paper, a novel network that supports simultaneous dual-hop and multi-hop transmissions using non-orthogonal multiple access (NOMA) is proposed. The network efficiently utilizes the existing infrastructure of a multi-hop network for concurrent dual-hop transmissions, and the performance of the network is evaluated and analyzed.