Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hybrid Multicast/Unicast Design in NOMA-based Vehicular Caching System
  with Supplementary Material   In this paper, we investigate a hybrid multicast/ unicast scheme for a
multiple-input single-output cache-aided non-orthogonal multiple access (NOMA)
vehicular scenario in the face of rapidly fluctuating vehicular wireless
channels. Considering a more practical situation, imperfect channel state
information is taking into account. In this paper, we formulate an optimization
problem to maximize the unicast sum rate under the constraints of the peak
power, the peak backhaul, the minimum unicast rate, and the maximum multicast
outage probability. To solve the formulated non-convex problem, a lower bound
relaxation method is proposed, which enables a division of the original problem
into two convex sub-problems. Computer simulations show that the proposed
caching-aided NOMA is superior to the orthogonal multiple access counterpart.

17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics