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The Internet of Things is considered to be the next big opportunity, and challenge, for the
Internet engineering community, users of technology, companies and society as a whole. It
involves connecting embedded devices such as sensors, home appliances, weather stations
and even toys to Internet Protocol (IP) based networks. The number of IP-enabled embedded
devices is increasing rapidly, and although hard to estimate, will surely outnumber the
number of personal computers (PCs) and servers in the future. With the advances made over
the past decade in microcontroller,low-power radio, battery and microelectronic technology,
the trend in the industry is for smart embedded devices (called smart objects) to become
IP-enabled, and an integral part of the latest services on the Internet. These services are no
longer cyber, just including data created by humans, but are to become very CONNECTED to the
physical world around us by including sensor data, the monitoring and control of machines,
and other kinds of physical context. We call this latest frontier of the Internet, consisting of
wireless low-power embedded devices, the Wireless Embedded Internet. Applications that
this new frontier of the Internet enable are critical to the sustainability, efficiency and safety
of society and include home and building automation, healthcare, energy efficiency, smart
grids and environmental monitoring to name just a few.
標(biāo)簽：
Embedded
Internet
Wireless
6LoWPAN
The
上傳時(shí)間：
2020-05-26
上傳用戶：shancjb
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Emergingmarketshaveseenanunprecedentedgrowthinthelastfewyears.Theoperatorfocus
has been on giving complete coverage to all regions (urban to rural) and to subscription to all –
people from the highest to the lowest income groups. When the idea is taking coverage for
the remotest of the regions and getting the ‘unCONNECTED–CONNECTED’, technology and business
modelling are two important focus areas.
標(biāo)簽：
Technologies
Cellular
Emerging
Markets
for
上傳時(shí)間：
2020-05-26
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In 2005, when the world crossed-over to Web 2.0, business professionals and managers in
every industry – from traditional retail to high tech media and telecom – felt the first powerful
tremors of the strategic shifts taking place, sweeping away traditional business models and
altering competitive landscapes.
標(biāo)簽：
CONNECTED
Services
上傳時(shí)間：
2020-05-27
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The rapid growth in mobile communications has led to an increasing demand for wide-
band high data rate communications services. In recent years, Distributed Antenna
Systems (DAS) has emerged as a promising candidate for future (beyond 3G or 4G)
mobile communications, as illustrated by projects such as FRAMES and FuTURE. The
architecture of DAS inherits and develops the concepts of pico- or micro-cell systems,
where multiple distributed antennas or access points (AP) are CONNECTED to and con-
trolled by a central unit.
標(biāo)簽：
Distributed
Antenna
Systems
上傳時(shí)間：
2020-05-27
上傳用戶：shancjb
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The telecommunications industry is undoubtedly in a period of radical change with
the advent of mobile broadband radio access and the rapid convergence of Internet
and mobile services. Some of these changes have been enabled by a fundamental
shift in the underlying technologies; mobile networks are now increasingly based
on a pure Internet Protocol (IP) network architecture. Since the first edition of this
book was published in 2009, a multitude of CONNECTED devices from eBook readers
to smartphones and even Machine-to-Machine (M2M) technologies have all started
to benefit from mobile broadband. The sea change over the last few years is only the
beginning of a wave of new services that will fundamentally change our economy, our
society, and even our environment. The evolution towards mobile broadband is one of
the core underlying parts of this revolution and is the focus of this book.
標(biāo)簽：
Networks
Packet
EPC
and
4G
上傳時(shí)間：
2020-05-27
上傳用戶：shancjb
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In this paper we revisit hybrid analog-digital precoding systems with emphasis on their modelling
and radio-frequency (RF) losses, to realistically evaluate their benefits in 5G system implementations.
For this, we decompose the analog beamforming networks (ABFN) as a bank of commonly used RF
components and formulate realistic model constraints based on their S-parameters. Specifically, we
concentrate on fully-CONNECTED ABFN (FC-ABFN) and Butler networks for implementing the discrete
Fourier transform (DFT) in the RF domain. The results presented in this paper reveal that the performance
and energy efficiency of hybrid precoding systems are severely affected, once practical factors are
considered in the overall design. In this context, we also show that Butler RF networks are capable of
providing better performances than FC-ABFN for systems with a large number of RF chains.
標(biāo)簽：
Analog-Digital
Precoding
Hybrid
上傳時(shí)間：
2020-05-27
上傳用戶：shancjb
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Smartphones have become a key element in providing greater user access to the
mobile Internet. Many complex applications which used to be limited to PCs, have
been developed and operated on smartphones. These applications extend the
functionalities of smartphones, making them more convenient for users to be
CONNECTED. However, they also greatly increase the power consumption of
smartphones, making users frustrated with long delays in Web browsing.
標(biāo)簽：
Browsing
Mobile
Cloud
Using
Web
the
上傳時(shí)間：
2020-05-30
上傳用戶：shancjb
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Advances in communication and networking technologies are rapidly making ubiq-
uitous network connectivity a reality. Wireless networks are indispensable for
supporting such access anywhere and at any time. Among various types of wire-
less networks, multihop wireless networks (MWNs) have been attracting increasing
attention for decades due to its broad civilian and military applications. Basically,
a MWN is a network of nodes CONNECTED by wireless communication links. Due
to the limited transmission range of the radio, many pairs of nodes in MWNs may
not be able to communicate directly, hence they need other intermediate nodes to
forward packets for them. Routing in such networks is an important issue and it
poses great challenges.
標(biāo)簽：
Multihop
Wireless
Networks
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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Recent decades have shown a tremendous expansion of the Internet. The number of
CONNECTED terminals has increased by orders of magnitude, traffic has grown exponen-
tially, coverage has become ubiquitous and worldwide, and today’s sophisticated Web
2.0 applications are increasingly providing services which hitherto have been the realm
of telecommunications, such as Skype and video conferencing. This has even led to the
thought that access to the Internet might one day be a universal right of every citizen.
This evolution will accelerate in the coming decades.
標(biāo)簽：
Networking
Personal
Networks
Wireless
上傳時(shí)間：
2020-05-31
上傳用戶：shancjb
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Short-range communications is one of the most relevant as well as diversified fields of en-
deavour in wireless communications. As such, it has been a subject of intense research and
development worldwide, particularly in the last decade. There is no reason to believe that this
trend will decline. On the contrary, the rapidly crystallizing vision of a hyper-CONNECTED world
will certainly strengthen the role of short-range communications in the future. Concepts such
as wireless social networks, Internet of things, car communications, home and office network-
ing, wireless grids and personal communications heavily rely on short-range communications
technology.
標(biāo)簽：
Communications
Short-Range
Wireless
上傳時(shí)間：
2020-06-01
上傳用戶：shancjb
