![](https://csdnimg.cn/release/download_crawler_static/86784780/bg14.jpg)
Preface
Wireless revolutions certainly necessitate the development of innovative, disruptive
technologies and groundbreaking applications. When these two forces meet, a new
generation of wireless technology emerges. This is exactly what happened when
mobile voice and digitalized radio transmission converged, and when the mobile
Internet came together with highly spectral efficient radio technology tailored towards
the IP protocol. The recent 5G wireless network seeks to achieve wireless connectivity
for both massive and ultra-high reliable links, ultimately connecting everything as we
know it, and accelerating the digital transformation of every business. Building on the
steps of 5G, the 6G wireless network has set a ubiquitous intelligence revolution as
the goal. In actuality, 6G will serve as our society’s neural network, and as the link
between the physical and cyber worlds. Artificial intelligence (AI) based on machine
learning will power 6G, and within this realm, our future will fully transform from
connected people, connected things to connected intelligence. Phrased differently, the
6G wireless network aims to deliver intelligence to every person, home, and business,
which in turn will bring the Intelligence of Everything into existence. From the
wireless technology perspective, we are presented with the opportunity to sense the
environment and things by exploiting wireless communication radio waves. As such,
in addition to transferring bits, the 6G wireless network could serve as networked
sensors that extract real-time knowledge and big data from the physical world. This
extracted information will not only go a long way in enhancing data transmission,
but will also facilitate machine learning for AI services. Another novel aspect, which
is definitely worth remembering, is the expansion of VLEO satellites, which orbit
the earth at very low altitude in very large constellations, ultimately creating 6G
wireless networks “in the sky.” As a result, wireless services and applications that
are covered anywhere and everywhere on our planet will not be beyond imagination.
Without doubt, this vision is immensely ambitious and will impact both our society
and economy substantially. On top of that, the creation of the 6G wireless network
will seize the opportunities offered by technological innovations in communications,
computing, materials, and algorithms. That said, this decade-long journey will not be
accomplished overnight.
In this book, we provide a comprehensive view of the 6G wireless network through
a technology lens. Our motivation is to introduce some of the initial research results
and critical thinking on the 6G wireless network. Not only do we review cutting-edge
wireless services and technologies; we also explore the requirements, capabilities, and