gsm stands for global system for mobile
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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Tài liệu Panache: A Parallel File System Cache for Global File Access ppt
Ngày tải lên :
19/02/2014, 18:20
... single-node caching file system layer
for Linux that can be used to enha nce the performance of
a distributed file system such as NFS [18]. FS-Cache is
not a standalone file system; instead it is ... and per-
formance of a trad itional cluster file system regardless
of the physical distance between data centers.
Panache is a scalable, high-performance, clustered file
system cache for parallel ... [29] are high ly-scalable object
based cluster file systems. These efforts have focused on
improving file-serving performance and are not desig ned
for remo te ly accessing data from existing file...
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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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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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Efficient core selection for multicast routing in mobile ad hoc networks
Ngày tải lên :
23/11/2012, 15:03
... suitable for mobile network with
unrestricted mobility node.
4 The information required to calculate the centroid node can easily integrate
with the existing CBT multicast protocol for mobile ... protocol. A mobile node forms a RREQ message when it wants to join a multicast
group or has information to send to a multicast group, but exists no route to this group.
- 15 -
In a mobile ad ... numbers are lower for the same group. Thus, for a certain group, a
node will have only one entry in the list of its connections from a given neighbor, and it just
keeps that information with the...
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VoIP for Global Communications
Ngày tải lên :
30/09/2013, 07:20
... Press, New York,
1999.
126
VoIP FOR GLOBAL COMMUNICATIONS
8
VoIP FOR GLOBAL
COMMUNICATIONS1
This Chapter discusses how IP-based voice communications can be deployed
for global communications in multinational ... An architecture for a packet-based global network for advanced or
enhanced VoIP and POTS services in a multinational corporation.) (Source: Adapted
from Fig. 3-8)
120
VoIP FOR GLOBAL COMMUNICATIONS
If ... a destination, and so on. Therefore, addi-
tional resources need to be allocated for these hardware and software plat-
forms.
The network performance–related information collected using these...
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DIY CO2 System for Planted Aquarium
Ngày tải lên :
08/11/2013, 01:15
... replacement a
breeze!
DIY CO2 System for Planted Aquarium
5 de 25 25/7/2005 15:44
system. In pressurized tank systems, there
is generally no liquids, or solids for that
matter, to foul
or ... Products
Aquarium
Systems
Maxi-Jet PH 600
That Fish Place
Big Al's
DIY CO2 System for Planted Aquarium
2 de 25 25/7/2005 15:44
atmospheric equilibrium are generally around 2-3ppm. (ppm stands for
part ... together.
DIY CO2 System for Planted Aquarium
19 de 25 25/7/2005 15:44
Using
any or both of these saftey systems
insures improved performance and
reliability of your
overall system.
These...
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Tài liệu Development of an Observe-By-Wire System for Forklifts Using Haptic Interfaces pptx
Ngày tải lên :
17/12/2013, 11:15
...
clearly shown that the OBW system could improve the
visibility as well as forklift performances.
2. OBSERVE BY WIRE FOR FORKLIFTS
2.1 System overview
Operating a forklift is a specialized ... transmit the view of forks’
environment in term of force feedback information, and
we named it as observe-by-wire system.
(a)
(b)
Fig. 2 The OBW system configuration, a forklift
lifts loads ... (5).
Fig. 3 The haptic interface is developed for the OBW
system
Fig. 4 The haptic interface is developed for the OBW
system
A fork system and working environment and control
algorithm...
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Tài liệu ADC KRONE - Pre-Design Cabling System for Banking Finance Cover ppt
Ngày tải lên :
20/12/2013, 22:15
...
Healthcare Services
l
Hospitality and Tourism
If a brochure for your industry is not listed above,
please contact KRONE for further information.
ZERO
BITERROR
RATE
GUARANTEED
... Constellation Street
Mairangi Bay
North Shore CITY
Tel (+64 4) 478 1625
Fax (+64 4) 478 1620
For information on any KRONEPremisNET
structured cabling solution, including TrueNet
Technology, please ... HEAD OFFICE
2 Hereford Street
BERKELEY VALE
NSW 2261
Tel (02) 4388 4422
Fax (02) 4388 4499
PO Box 335
WYONGNSW 2259...
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