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Over the past few decades, wireless communications and networking have witnessed an
unprecedented growth, and have become pervasive much sooner than anyone could have
predicted. For example, cellular wireless networks are expected to become the dominant
and ubiquitous telecommunication means in the next few decades. The widespread
success of cellular and WLAN systems prompts the development of advanced wireless
systems to provide access to information services beyond voice such as telecommuting,
video conferencing, interactive media, real-time internet gaming, and so on, anytime
and anywhere.
標簽：
Compressive
Networks
Wireless
Sensing
for
上傳時間：
2020-05-27
上傳用戶：shancjb
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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.
標簽：
Distributed
Antenna
Systems
上傳時間：
2020-05-27
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The General Packet Radio Service (GPRS) allows an end user to send and
receive data in packet transfer mode within a public land mobile network
(PLMN) without using a permanent connection between the mobile station
(MS) and the external network during data transfer. This way, GPRS opti-
mizes the use of network and radio resources (RRs) since, unlike circuit-
switched mode, no connection between the MS and the external network is
established when there is no data flow in progress. Thus, this RR optimiza-
tion makes it possible for the operator to offer more attractive fees.
標簽：
Mobile
EDGE
上傳時間：
2020-05-27
上傳用戶：shancjb
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Wirelessmeshnetworkingisahotandgrowingtopic,stillinitsinfancyin
some ways, whilst already shown to be capable in others. From a military
beginning, mesh networks moved to civilian use and are now being
deployed worldwide as both local area networks (LANs) and metro-
politan area networks (MANs). However, these deployments are still
‘leading edge’ and it is not yet clear what the most enduring applications
of mesh will be – particularly as the market moves from early adopters
towards widespread take up.
標簽：
Essentials
Networking
Wireless
Mesh
of
上傳時間：
2020-05-27
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During the past two decades there has been a substantial growth in research in
wireless communications. The number of journals published from various parts of
the world catering to the research community has grown exponentially. Despite
such a growth, the engineering community still needs more information so as to
thoroughly comprehend wireless channel characteristics. What specifically must be
understood are the effects of channel degradation brought on by statistical fluctua-
tions in the channel.
標簽：
Shadowing
Wireless
Systems
Fading
and
in
上傳時間：
2020-05-27
上傳用戶：shancjb
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Fundamentals of WiMAX was consciously written to appeal to a broad audience, and to be of
value to anyone who is interested in the IEEE 802.16e standards or wireless broadband networks
more generally. The book contains cutting-edge tutorials on the technical and theoretical under-
pinnings to WiMAX that are not available anywhere else, while also providing high-level over-
views that will be informative to the casual reader.
標簽：
Understanding
Fundamentals
WiMAX
of
上傳時間：
2020-05-27
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Currently, the information and communications technology (ICT) industry sector
accounts for about 2–6% of the energy consumption worldwide, and a significant por-
tion of this is contributed by the wireless and mobile communications industry. With
the proliferation of wireless data applications, wireless technology continues to increase
worldwide at an unprecedented growth rate. This has resulted in an increased number
of installed base stations and higher demand on power grids and device power usage,
causing an increased carbon footprint worldwide.
標簽：
Communication
Networks
Green
Radio
上傳時間：
2020-05-27
上傳用戶：shancjb
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With the rapid growth in the number of wireless applications, services and devices,
using a single wireless technology such as a second generation (2G) and third gener-
ation (3G) wireless system would not be efficient to deliver high speed data rate and
quality-of-service (QoS) support to mobile users in a seamless way. The next genera-
tion wireless systems (also sometimes referred to as Fourth generation (4G) systems)
are being devised with the vision of heterogeneity in which a mobile user/device will
be able to connect to multiple wireless networks (e.g., WLAN, cellular, WMAN)
simultaneously.
標簽：
Heterogeneous
Wireless
Networks
Access
上傳時間：
2020-05-27
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With the rapid growth of the wireless mobile applications, wireless voice has
begun to challenge wireline voice, whereas the desire to access e-mail, surf the
Web or download music (e.g., MP3) wirelessly is increasing for wireless data.
While second generation (2G) cellular wireless systems, such as cdmaOne1,
GSM2 and TDMA3, introduced digital technology to wireless cellular systems
to deal with the increasing demand for wireless applications, there is still the
need for more spectrally efficient technologies for two reasons. First, wireless
voice capacity is expected to continue to grow. Second, the introduction of
high-speed wireless data will require more bandwidth.
標簽：
Wireless
Systems
Mobile
Beyond
and
3G
上傳時間：
2020-05-30
上傳用戶：shancjb
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The last decade proved to be hugely successful for the mobile communications industry,
characterised by continued and rapid growth in demand, spurred on by new technological
advances and innovative marketing techniques. Of course, when we refer to mobile commu-
nications, we tend to implicitly refer to cellular systems, such as GSM. The plight of the
mobile-satellite industry over the last decade, although eventful, has, at times, been more akin
to an out of control roller coaster ride.
標簽：
Communication
Satellite
Networks
Mobile
上傳時間：
2020-05-30
上傳用戶：shancjb
