Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Digital Twin of Wireless Systems: Overview, Taxonomy, Challenges, and
  Opportunities   Future wireless services must be focused on improving the quality of life by
enabling various applications, such as extended reality, brain-computer
interaction, and healthcare. These applications have diverse performance
requirements (e.g., user-defined quality of experience metrics, latency, and
reliability) that are challenging to be fulfilled by existing wireless systems.
To meet the diverse requirements of the emerging applications, the concept of a
digital twin has been recently proposed. A digital twin uses a virtual
representation along with security-related technologies (e.g., blockchain),
communication technologies (e.g., 6G), computing technologies (e.g., edge
computing), and machine learning, so as to enable the smart applications. In
this tutorial, we present a comprehensive overview on digital twins for
wireless systems. First, we present an overview of fundamental concepts (i.e.,
design aspects, high-level architecture, and frameworks) of digital twin of
wireless systems. Second, a comprehensive taxonomy is devised for both
different aspects. These aspects are twins for wireless and wireless for twins.
For the twins for wireless aspect, we consider parameters, such as twin objects
design, prototyping, deployment trends, physical devices design, interface
design, incentive mechanism, twins isolation, and decoupling. On the other
hand, for wireless for twins, parameters such as, twin objects access aspects,
security and privacy, and air interface design are considered. Finally, open
research challenges and opportunities are presented along with causes and
possible solutions.

37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
23
The categories of this paper are: solv-int
2
The categories of this paper are: math