gsmr global system for mobile communicationrailway
GSM Global System for Mobiles
Ngày tải lên :
19/10/2013, 15:15
... Network
OMC
AUC
HLR
MSC
EIRVLR
BSC
BTS
MS
External
PSTN &
PDN N/W
SS
BSS
Switching
System
Base Station
System
MS
Mobile Station
BTS
Base transceiver System
BSC
Base Station Controller
MSC
Mobile Switching Center
HLR
Home Location ... 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 ... Circuit Switched Data
EDGE = Enhanced Data rate for GSM Evolution
UMTS = Universal Mobile Telecommunication System
10 sec 1 min 10 min 1 hour0
UMTS
E/GPRS
ISDN
PSTN
GSM
webe-mail photo
web photo
e-mail
web...
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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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Mobile Communication System Evolution
Ngày tải lên :
14/09/2012, 11:26
... satellite and wireless-local area network (W-
LAN) solutions. 2G systems are synonymous with the globalisation of mobile systems, and in
Mobile Satellite Communication Networks. Ray E. Sheriff and ... Framework for UMTS, No. 1 Report from the UMTS Forum, June 1997.
[UMT-98a] ‘‘ Mobilennium’’ , UMTS Forum Newsletter, No. 3, May 1998; 6.
[UMT-98b] The Path Towards UMTS – Technologies of the Information ... phase of UMTS implementation of
3GPP.
3GPP was formed in 1998 with the aim of providing globally applicable technical speci-
fications for a 3G mobile system. These specifications are based on an...
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Mobile Communication System Evolution
Ngày tải lên :
14/09/2012, 11:26
... Market
GPRS General Packet Radio Service
GPS Global Positioning System
GRAN Generic Radio Access Network
GSC Gateway Station Control
GSM Global System for Mobile Communications
GSN GPRS Support Node
GSO ... Line-of-Sight
LS Location Server
MAHO Mobile Assisted HO
MAP Mobile Application Part
MAP Maximum a Posteriori
MBCF Mobile BCF
MCC Mobile Country Code
MCF Mobile Control Function
MCHO Mobile Controlled HO
MCPC ... European Posts and Telegraphs
CGI Cell Global Identification
CI Carrier Information
CI Cell Identity
CI Control Information
CIMS Customer Information Management System
CM Connection Management
CN...
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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 ...
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 ... platform and
medical knowledge database. Therefore, the main functions
of our system are described below.
• A real-time mobile health monitoring system for the
elderly to monitor the health condition...
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Báo cáo hóa học: " A fast iterative localized re-authentication protocol for UMTS-WLAN heterogeneous mobile communication networks" pot
Ngày tải lên :
20/06/2014, 22:20
... generation wireless and mobile communication
networks. The heterogeneous mobile communication
network aims to provide seamless services for the
mobile user (MS) roaming across different mobile com-
muni ... scheme for UMTS-WLAN
interworking, in Proceedings of IEEE Globalcom 2004, 3, 1559–1564 (2004)
7. M Kim, H Ju, Y Kim, J Park, Design and implementation of mobile trusted
module for trusted mobile ... demands for broadband wireless access to
IP services between different wireless and mobile com-
munication networks are increa sed rapidly. IP backbone
constituted a core network for heterogeneous mobile
communication...
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Báo cáo hóa học: " An efficient and secure anonymous authentication scheme for mobile satellite communication systems" doc
Ngày tải lên :
21/06/2014, 00:20
... scheme for mobile
satellite communication systems. ACM SIGOPS Oper Syst Rev. 145(2-3),
42–47 (2003)
15. YF Chang, CC Chang, An efficient authentication protocol for mobile
satellite communication systems. ... another authentica-
tion scheme for mobile satellite communication system
based on secret-key cryptosystems (SKC). The scheme
reduced the complex computation overhead for mobile
users by adopting only ... telecom-
munication systems are connected together via the satel-
lite communication model to provide diversified
communication services, thus forming the so-called
mobile satellite communication system (MSCS for
short)....
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báo cáo hóa học:" Research Article Exponential Stability and Global Attractors for a Thermoelastic Bresse System" pdf
Ngày tải lên :
21/06/2014, 11:20
... constants for the elastic and thermal material properties.
From this seemingly complicated system, very interesting special cases can be
obtained. In particular, the isothermal system is exactly the system ... exponential stability for the Timoshenko system, but when
the wave speeds are different, the Timoshenko system loses the exponential stability. This
phenomenon has been observed for partially damped ... conditions for exponential stability of linear dynamical systems in Hilbert
spaces,” Annals of Differential Equations, vol. 1, no. 1, pp. 43–56, 1985.
19 S. Borini and V. Pata, “Uniform attractors for...
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Báo cáo hóa học: "Research Article Alternative Speech Communication System for Persons with Severe Speech Disord" pptx
Ngày tải lên :
21/06/2014, 20:20
... laboratory systems used speech recognition
for speech training purposes in order to help persons with
SSD [22–24].
The adaptive system we propose uses speaker-dependent
automatic speech recognition systems ... Speech-Enabled Systems to Correct
Dysarthria and SSD
4.1. Overall System. Figure 1 shows the system we propose
to recognize and resynthesize both dysarthric speech and
speech affected by SSD. This system ... available for the Acadian
French corpus of pathologic speech. These references and
sentences are extracted from the RACAD corpus we have
built to develop automatic speech recognition systems for
the...
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Báo cáo hóa học: " Multilevel LDPC Codes Design for Multimedia Communication CDMA System" docx
Ngày tải lên :
23/06/2014, 00:20
... access
(CDMA) system, the primary challenge is high-quality and
high data rate multimedia communication. Normally, the
mobile transmission systems deal with various kinds of infor-
mation such ... a given code rate for MLC/PID designs.
Therefore, we list several parameters which should be satis-
fied in the proposed MLC/PID design for 8PSK modulation.
Multilevel LDPC for Multimedia CDMA ... interests are sequences,
CDMA mobile communication systems, er-
ror coding, and space time signal processing.
Yu Yi received his Master’s degree from
the Institute of Information and Com-
munications,...
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Báo cáo hóa học: " A Noise Reduction Preprocessor for Mobile Voice Communication" doc
Ngày tải lên :
23/06/2014, 01:20
... Telecommunications
System (Phase 2+); Universal Mobile Telecommunications Sys-
tem (UMTS); Noise Suppression for the AMR Codec; Service
Description, June 2002.
[27] ETSI, TR 126 978, V4.0.0: Universal Mobile ... discontinuities are greatly reduced if we use a ta-
peredwindowforspectralsynthesisaswellasoneforspectral
A Noise Reduction Preprocessor for Mobile Voice Communication 1047
x
d
Noise reduction
preprocessor
Speech
encoder
Transmission
channel
Speech
decoder
y
Noise ... E
D
k
2
.
(13)
In [6], γ
k
is called the a posteriori SNR for bin k, η
k
is called
A Noise Reduction Preprocessor for Mobile Voice Communication 1051
We therefore turn our attention to the a posteriori SNR,
γ
k
,definedin(12)...
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