Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Twin-Timescale Radio Resource Management for Ultra-Reliable and
  Low-Latency Vehicular Networks   To efficiently support safety-related vehicular applications, the
ultra-reliable and low-latency communication (URLLC) concept has become an
indispensable component of vehicular networks (VNETs). Due to the high mobility
of VNETs, exchanging near-instantaneous channel state information (CSI) and
making reliable resource allocation decisions based on such short-term CSI
evaluations are not practical. In this paper, we consider the downlink of a
vehicle-to-infrastructure (V2I) system conceived for URLLC based on idealized
perfect and realistic imperfect CSI. By exploiting the benefits of the massive
MIMO concept, a two-stage radio resource allocation problem is formulated based
on a novel twin-timescale perspective for avoiding the frequent exchange of
near-instantaneous CSI. Specifically, based on the prevalent road-traffic
density, Stage 1 is constructed for minimizing the worst-case transmission
latency on a long-term timescale. In Stage 2, the base station allocates the
total power at a short-term timescale according to the large-scale fading CSI
encountered for minimizing the maximum transmission latency across all
vehicular users. Then, a primary algorithm and a secondary algorithm are
conceived for our V2I URLLC system to find the optimal solution of the
twin-timescale resource allocation problem, with special emphasis on the
complexity imposed. Finally, our simulation results show that the proposed
resource allocation scheme significantly reduces the maximum transmission
latency, and it is not sensitive to the fluctuation of road-traffic density.

28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
30
The categories of this paper are: q-alg
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics