How to Minimize the Weighted Sum AoI in Multi-Source Status Update Systems: OMA or NOMA?. (arXiv:2205.03143v2 [cs.IT] UPDATED)

In this paper, the minimization of the weighted sum average age of
information (AoI) in a multi-source status update communication system is
studied. Multiple independent sources send update packets to a common
destination node in a time-slotted manner under the limit of maximum
retransmission rounds. Different multiple access schemes, i.e., orthogonal
multiple access (OMA) and non-orthogonal multiple access (NOMA) are exploited
here over a block-fading multiple access channel (MAC). Constrained Markov
decision process (CMDP) problems are formulated to describe the …

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