Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Time Synchronization in 5G Wireless Edge: Requirements and Solutions for
  Critical-MTC   Wireless edge is about distributing intelligence to the wireless devices
wherein the distribution of accurate time reference is essential for
time-critical machine-type communication (cMTC). In 5G-based cMTC, enabling
time synchronization in the wireless edge means moving beyond the current
synchronization needs and solutions in 5G radio access. In this article, we
analyze the device-level synchronization needs of potential cMTC applications:
industrial automation, power distribution, vehicular communication, and live
audio/video production. We present an over-the-air (OTA) synchronization scheme
comprised of 5G air interface parameters, and discuss their associated timing
errors. We evaluate the estimation error in device-to-base station propagation
delay from timing advance (TA) under random errors and show how to reduce the
estimation error. In the end, we identify the random errors specific to dense
multipath fading environments and discuss countermeasures.

26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
16
The categories of this paper are: stat
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an