Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performance Analysis of Sensing-Based Semi-Persistent Scheduling in
  C-V2X Networks   The 3rd Generation Partnership Project released the cellular
vehicular-to-everything (C-V2X) specifications as part of the LTE framework in
Release 14. C-V2X is the alternative to dedicated short range communications
and both are specifically designed for V2X control signaling. C-V2X extends the
device-to-device specifications by adding two more modes of operation targeting
the vehicular environment in coverage and out of coverage of LTE base stations.
Vehicle-to-vehicle communications (V2V) is established with Mode 4, where the
devices schedule their transmissions in a distributed way employing
sensing-based semi-persistent scheduling (SPS). Research is needed to assess
the performance of SPS, especially in congested radio environments. This paper
presents the first open-source C-V2X simulator that enables such research. The
simulator is implemented in ns-3. We analyze the effect of the Mode 4 resource
pool configuration and some of the key SPS parameters on the scheduling
performance and find that the resource reservation interval significantly
influences packet data rate performance, whereas resource reselection
probability has little effect in dense vehicular highway scenarios. Our results
show that proper configuration of scheduling parameters can significantly
improve performance. We conclude that research on congestion control mechanisms
is needed to further enhance the SPS performance for many practical use cases.

3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex