Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evaluating the Performance of eMTC and NB-IoT for Smart City
  Applications   Low power wide area network (LPWAN) is a wireless telecommunication network
that is designed for interconnecting devices with low bitrate focusing on long
range and power efficiency. In this paper, we study two recent technologies
built from existing Long-Term Evolution (LTE) functionalities: Enhanced machine
type communications (eMTC) and Narrow band internet of things (NB-IoT). These
technologies are designed to coexist with existing LTE infrastructure,
spectrum, and devices. We first briefly introduce both systems and then compare
their performance in terms of energy consumption, latency and scalability. We
introduce a model for calculating the energy consumption and study the effect
of clock drift and propose a method to overcome it. We also propose a model for
analytically evaluating the latency and the maximum number of devices in a
network. Furthermore, we implement the main functionality of both technologies
and simulate the end-to-end latency and maximum number of devices in a
discrete-event network simulator NS-3. Numerical results show that 8 years
battery life time can be achieved by both technologies in a poor coverage
scenario and that depending on the coverage conditions and data length, one
technology consumes less energy than the other. The results also show that eMTC
can serve more devices in a network than NB-IoT, while providing a latency that
is 10 times lower.

20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org