Bit-Interleaved Multiple Access: Improved Fairness, Reliability, and Latency for Massive IoT Networks

Internet-of-Things (IoT) networks require massive connections in dense areas. Therefore, a resource efficient multiple access scheme seems inevitable to enable immense connectivity where devices have share the same block. Non-orthogonal (NOMA) has been considered as strongest candidate recent years. However, this paper, by considering practical implementation, we first provide true power allocation (PA) constraint with finite alphabet inputs for conventional downlink NOMA and demonstrate that it cannot support systems. To end, propose bit-interleaved (BIMA) IoT networks. The proposed BIMA implements bitwise multiaccess interleaving deinterleaving at transceiver ends there are no strict PA constraints, unlike NOMA, thus allowing high number of We comprehensive analytical framework investigating all key performance indicators (KPIs) present both information-theoretic (i.e., ergodic capacity EC outage probability OP) bit error rate BER) metrics instantaneous statistical channel ordering. In addition, define Jain’s fairness index proportional terms KPIs. Based on extensive computer simulations, reveal outperforms significantly, gain up 20-30 dB KPIs some scenarios. other words, compared schemes, met less transmit power, which is quite promising energy-limited use cases. Moreover, becomes greater when more supported. provides full diversity order enables implementation an arbitrary modulation orders, crucial huge should be supported single block addition overall gain, guarantees system none gets severely degraded sum-rate shared fair manner among devices. It QoS satisfaction Finally, intense complexity latency analysis lower receivers, since allows parallel computation receivers iterative operations required. show reduces 350% specific 170% average.