Priority-Based Channel Access for SAN Protocol in M2M Communication

Recently NOMA (Non-Orthogonal Multiple Access) has been examined when applied with slotted ALOHA protocol for uncoordinated transmissions. Slotted ALOHA-NOMA (SAN) protocol effectively raised the throughput of the network without any need for bandwidth expansion. In this paper, we consider how employing the priority on channel access in SAN protocol can reduce the collisions and increase the throughput. Meanwhile, we suggest an algorithm based on the priority of the SAN nodes. The simulation outcomes show our proposed Priority-SAN has improved the throughput performance compared with the SAN protocol.