gsm global system for mobile communications
GSM Global System for Mobiles
Ngày tải lên :
19/10/2013, 15:15
... (900)
35
35
124
10
10
45
2x7.2
2x7.2
2x25
460.4-467.6
488.8-496
869-894
450.4-457.6
478.8-486
824-849
GSM 450
GSM 480
GSM 850
Duplex
channels
Duplex
Spacing
BandDownlinkUplinkGSM systems
GSM Time
Division
Multiplex
Frame and Physical Channels
TS ... time-slots
BTS side
MSs side
BTS
TDMA Frame (4.615 ms)
3
TOPICS
• GSM CONCEPTS
• GSM SYSTEM ARCHITECTURE
• IDENTITIES USED IN GSM
• GSM CHANNELS
• GSM RADIO LINK
• MOBILITY MANAGEMENT
• CALL MANAGEMENT
• ... messages
• International Mobile Equipment Identifier (IMEI)
38
GSM Architecture
HLR
VLR
EIR
AUC
MSC
B
S
C
B
S
C
SMSC
PSTN
VMSC
Mobile
Station
GSM
Air interface
OMCR
TRAU
Base Station System
Network and...
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Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
Ngày tải lên :
02/03/2013, 16:59
... Control
MAHO Mobile Assisted Handover
MA Mobile Allocation (of radio frequency channels) in GSM
MAI Multiple Access Interference
MAIO Mobile Allocation Index Offset (for frequency hopping in GSM)
MBS Mobile ... which are discussed extensively
in Chapter 4.
For one 2G system called cdmaOne and most 3G systems, e.g. the Universal Mobile
Telecommunications System (UMTS), DS/CDMA was chosen as a basic multiple ... Communication Systems 25
2.2.1 Analogue First Generation Cellular Systems 25
2.2.2 Digital Second Generation Systems 25
2.3 First 3G Systems 27
2.3.1 Requirements for 3G 27
2.3.2 Evolution of 2G Systems...
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IP for 3G - Networking Technologies for Mobile Communications
Ngày tải lên :
27/10/2013, 17:15
... (Release 99) Architecture.
For readers familiar with the GSM, the MSC, G-MSC, HLR, and VLR (see Further reading
for more information on GSM) are simply the normal GSM components but with added ... spectrally efficient that 1G. GSM (Global System for Mobile
communication) has become the dominant 2G standard and roaming is now possible
between 150+ countries where GSM is deployed.
•
3G - ... (number of systems [9]).
2G systems have not stood still and are introducing higher-speed packet data services (so-
called 2.5G systems: the GSM 2.5G evolution is GPRS - GSM Packet Radio System) ....
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Tài liệu 68 Array Processing for Mobile Communications pdf
Ngày tải lên :
16/12/2013, 04:15
... Center for Telecom-
munications and Information Systems Laboratory, Stanford University, Stanford, CA, June
1994.
[2] Second workshop on smart antennas in wireless mobile communications, Center for ... selection performance analysis of a switched
multi-beamantenna systemin mobile communications environments, Stanford, CA,July 1995.
Second workshop on Smart Antennas in Wireless Mobile Communications.
[28] ... Telecom-
munications and Information Systems Laboratory, Stanford University, Stanford, CA, July
20-21, 1995.
[3] Third workshop on smart antennas in wireless mobile communications, Center for Telecom-
munications...
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Sprite: A Simple, Cheat-Proof, Credit-Based System for Mobile Ad-Hoc Networks potx
Ngày tải lên :
15/03/2014, 04:20
... bandwidth and storage requirement.
B. System performance vs. network resource
We next evaluate the performance of our system. One major
metric of the performance of our system is the message success
rate, ... Sprite, a simple, cheat-proof, credit-
based system for stimulating cooperation among selfish nodes in
mobile ad hoc networks. Our system provides incentive for mobile
nodes to cooperate and report actions ... discussed in Sec-
tion III, although our system provides incentive for cooperation
by giving more credit for forwarding a message, whether or
not to forward a specific message will depend on the...
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hsdpahsupa for umts high speed radio access for mobile communications
Ngày tải lên :
01/06/2014, 09:38
... Guaranteed Bit Rate
GERAN GSM/ EDGE RAN
GGSN Gateway GPRS Support Node
GI Guard Interval
GP Processing gain
GPRS General Packet Radio Service
GSM Global System for Mobile Communications
HARQ Hybrid ... E-DCH Transport Format Combination
E-TFCI E-DCH Transport Format Combination Indicator
ECR Effective Code Rate
EDGE Enhanced Data rates for GSM Evolution
EDGE Enhanced Data Rate for Global Evolution
EGPRS ... responsible for physical layer aspects;
. TSG RAN WG2: responsible for layer 2 and 3 aspects;
. TSG RAN WG3: responsible for RAN internal interfaces;
. TSG RAN WG4: responsible for performance and...
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fixed broadband wireless system design the creation of global mobile communications
Ngày tải lên :
03/06/2014, 00:52
... the system operation before the system is
actually built. If the modeling process shows that the system performance is inadequate,
then the design can be adjusted until the predicted performance ... processes the power in an effort to recover exactly the source information
that was originally transmitting. For some systems this process can be quite complex, with
methods for decoding signals, correcting ... transmitted source information is a broad general measure
of the quality of the communication system and the success of the system design.
20 FIXED BROADBAND WIRELESS SYSTEMS
challenges to system designers...
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Multicarrier Techniques for 4G Mobile Communications
Ngày tải lên :
26/04/2013, 09:50
... Techniques for 4G Mobile Communications, Shinsuke Hara
and Ramjee Prasad
OFDM for Wireless Multimedia Communications, Richard van Nee and
Ramjee Prasad
Radio over Fiber Technologies for Mobile Communications ... (2G) systems in the 1990s, such as
Global Systems for Mobile Telecommunications (GSM) [1], Personal Digital
Cellular (PDC) [2], and Interim Standard (IS)-95 [3], on digital technologies
for voice-oriented ... present and future mobile communi-
cations systems. As an evolutional form of mobile phone systems, Interna-
tional Mobile Telecommunications (IMT)-2000 [4, 5], which corresponds
to 3G systems, aims...
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Tài liệu Multicarrier Techniques for 4G Mobile Communications P1 docx
Ngày tải lên :
20/01/2014, 23:20
... (2G) systems in the 1990s, such as
Global Systems for Mobile Telecommunications (GSM) [1], Personal Digital
Cellular (PDC) [2], and Interim Standard (IS)-95 [3], on digital technologies
for voice-oriented ... present and future mobile communi-
cations systems. As an evolutional form of mobile phone systems, Interna-
tional Mobile Telecommunications (IMT)-2000 [4, 5], which corresponds
to 3G systems, aims ... t).
1
Introduction
1.1 Mobile Communications Systems: Past, Present, and
Future
There has been a paradigm shift in mobile communications systems every
decade. The first generation (1G) systems in the...
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Tài liệu Multicarrier Techniques for 4G Mobile Communications P doc
Ngày tải lên :
20/01/2014, 23:20
... Propagation and Subsystems Research for the Evolution
of Mobile Communications, ’’ IEEE Comm. Mag., Vol. 34, No. 2, February 1996,
p. 58.
[2] Prasad, R., Universal Wireless Personal Communications, ... Communication Systems and Techniques,
New York: IEEE Press, 1996.
[4] Jakes, Jr., C., Microwave Mobile Communications, New York: John Wiley & Sons,
1974.
[5] Lee, W. C. Y., Mobile Communications ... written in a column vector form as
S = [s (iT
s
+ t
spl
), ,s(iT
s
+ qt
spl
), ,s(iT
s
+ N
SC
t
spl
)]
T
(3.8)
= W
−
1
(N
SC
)C
i
28 Multicarrier Techniques for 4G Mobile Communications
Figure 3.1...
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iCare: A Mobile Health Monitoring System for the Elderly pptx
Ngày tải lên :
28/03/2014, 19:21
... personal health information
system and the medical guidance.
1) Personal health information system: The personal
health system can store physiological data and other
information in the database ... receives advice and
threshold information from doctors in the form of SMS via
GSM. Especially, data receiving module contains data-
formatted function that formats data and classifies them ...
Our system is also a mobile health system for the elderly
with tailored services depending on their personal health
condition. However, it is not only a remote and real-time
monitoring system...
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A Fast File System for UNIX
Ngày tải lên :
12/09/2012, 14:16
... McKusick, M., "Performance Effects of Disk Subsystem Choices
for VAX Systems Running 4.2BSD UNIX", Computer Systems Research Group,
SMM:05-12 A Fast File System for
UNIX
administration ... byte block
UNIX file system. The new file system uses less space than the 512 byte or 1024 byte file systems for
indexing information for large files and the same amount of space for small files. These ... [Operating Systems]: Performance −
measurements, operational analysis; H.3.2 [Information Systems]: Information Storage − file organization
Additional Keywords and Phrases: UNIX, file system organization,...
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A web-based system for notifying environment violation.doc
Ngày tải lên :
27/10/2012, 16:40
... 13
Web-based Geographic Information System 13
3.1. Geographic Information System overview 13
3.1.1. Definition 13
3.1.2. Data representation in GIS system 13
3.1.3. Other terms in GIS system 15
3.1.3. ... according its permission.
4.3. System architecture
GreenPeace applied the three-tier architecture for dynamic web based system. It
combines rich client design and web-based GIS system at presentation ... of Java Platform that runs on the web-based. Java binary
codes may be downloaded to browser before processing.
- Microsoft Silverlight: The newest web platform from Microsoft to perform
logic...
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