subash final
TRANSCRIPT
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.RAAJDHANI ENGG COLLEGE
MANISHA SWAIN :- &BRANCH COMPUTER SCIENCE E . :- .REGD NO 0801294058
3 G( )V S W I F I
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: -I N T R O D U C T I O NHistory of 3g3gAdvantages of 3g
Disadvantages of 3gHistory of wi-fiAdvantages of Wi-FiDisadvantages of Wi-Fi
3g Vs Wi-FiConclusion
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: -HISTORY
History and evolution of mobile radio:-
Brief history of cellular wireless telephony
Radio technology today: TDMA, CDMA
Demographics and market trends today3G vision, 3G migration paths
Evolving network architectures:-
Based on GSM-MAP or on IS-41 today
3GPP versus 3GPP2 evolution paths
3G utilization of softswitches, VoIP and SIP
Potential for convergence
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: -3G Vision Universal global roaming Multimedia (voice, data & video)
Increased data rates:-
384 kbps while moving
2 Mbps when stationary at specificlocations
Increased capacity (more spectrally
efficient) IP architecture.
Problems:-
No killer application for wireless data as
yet
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: -3G QoS
Substantial new requirements on theradio access network.
Traffic classes:-Conversational, streaming, interactive,
backgroundAbility to specify:-
Traffic handling priority
Allocation/retention priority
Error rates (bits and/ or SDUs)Transfer delay
Data rates (maximum and guaranteed)
Deliver in order (Y/N)
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: -Background
3G networks:-W-CDMAUMTSFOMA
cdma2000 1x EVDO, 3xTD-SCDMA
UMAEDGE
Supports data rates from 384kbps to2Mbps
Packet switched data servicesUse Licensed spectrum, no spare
spectrumNo proven mathematical formula on how
to handle capacity problems
Network divided into cellsEach cell shares bandwidth
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: -ADVANTAGES OF 3G
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CDMA
GSM
TDMA
PHS(IP-Based)
64Kbps
GPRS
115Kbps
CDMA 1xRTT
144 Kbps
EDGE
384Kbps
cdma2000
1X-EV-DV
Over 2.4 Mbps
W-CDMA
(UMTS)
Up to 2Mbps
2G
2.5G
2.75G 3G
1992 - 2000+2001+
2003+
1G
1984 - 1996+
2003 - 2004+
TACS
NMT
AMPS
GSM/
GPRS
(Overlay)
115 Kbps
9.6 Kbps
9.6 Kbps
14.4 Kbps
/ 64 Kbps
9.6 Kbps
PDC
Analog Voice
Digital VoicePacket Data
IntermediateMultimedia
Multimedia
PHS
TD-SCDMA
2 Mbps?
9.6 Kbps
iDEN
(Overlay)
iDEN
Source: U.S. Bancorp Piper Jaffray
Migration To 3G : -
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- :-3G 324M Video ServicesInitial mobile video service uses 3G
data bandwidth w/o IP multimediainfrastructure.Deployed by DoCoMo in Japan today..
Leverage high speed circuit-switchdata path..
64 kbps H.324 video structure
MPEG 4 video coding
AMR audio coding
Supports video clips, video streamingand live video conversations..
MS to MS
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3G Partnership Project( ) : -3 G P P3GPP defining migration from GSM to
UMTS (W-CDMA):Core network evolves from GSM-only to
support GSM, GPRS and new W-CDMAfacilities
3GPP Release 99:Adds 3G radios
3GPP Release 4:
Adds softswitch/ voice gateways andpacket core
3GPP Release 5:First IP Multimedia Services (IMS) w/
SIP & QoS3GPP Release 6:
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: -World Telecom Statistics
0
200
400
600
800
1000
1200
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
Landline Subs
Mobile Subs
(
)
million
s
Crossoverhas happened
!May 2002
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: -DISADVANTAGES
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:Critical For 3G : -Continued Growth In China
CDMA IS-95 (2G) has been slow to launch inChina
Why would the launch of 3G be any different?
PHS (2G) with China Telecom/Netcom is gaining
Likely 3G licensingoutcomes:
China Unicom cdma2000
China Mobile W-CDMA
China Telecom W-CDMA/ TD-SCDMA?
China Netcom W-CDMA/ TD-SCDMA?
: -R i s k
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: -3G Spectrum Expensive
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- : -WI FI
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: -HistoryWiFi is used to
describe theunderlyingtechnology ofwireless local areanetworks (WLAN)based on the IEEE802.11specifications .
WiFi developed by
Kyle Brown. IEEE 802.11 denotes
a set of WirelessLAN/WLANstandards
developed by
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: -First WiFi Intended for
cashiers Called
WaveLAN
Vic Hayes Father of WiFi
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-Network LevelArchitecture : -
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: -Protocols
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- : -ADVANTAGES OF Wi Fi
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Wireless Access TableWireless Router
Wireless Ethernet Bridge
Range Extender
: -A P P L I C A T I O N S
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3G ( ) vs - : -Wi Fi
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: -AgendaPendahuluanTeknologiPerbandinganPeluang Business& MarketingThe FutureConclusion
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&Introduction: -Technology
cdmaOne
GSM
TDMA
PDC
2G9.6 - 14.4
kbps
MC1X
GPRS
evolved2G64144 kbps
WLAN
Bluetooth
evolved 3G384 kbps - 20
Mbps
Always Best
Connected
EDGE
WCDMA
cdma2000
3G384 kbps - 2
Mbps
4G100Mbps?
xMbps @
60GHz
Adhoc
networks
Optical
Networking
Newair-
interfa
ce?
Virtual
Reality
Always BestConnected
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&Cellular TechnologyEvolution : -
0.384 2Bandwidth
(Mbps)
Network
Mobile
Fixed
2G 3G
3G applicationsgetting bigger, better
and more beautiful
Wireless/mobilespecific broadband
applications
Fixed networkapplications
go wireless/mobile
4G
Broadband,Extreme bit rates
NB WB BB
20
Evo
lved
2G
Evo
lved
3G
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Wireless Personal Area Network
Wireless Local Area Network
: -Telco VisionWireless Interworking: -TechnologiesHand-over
Hand-over
Wireless Wide Area Network
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: . :-Comparisons 3G vs WiFi3G WiFi
Standard WCDMA,CDMA2000 IEEE 802.11
Max Speed 2 Mbps 54 Mbps
Operations Cell phone companies Individuals, WISP
License Yes No
Coverage Area Several km About 100m
Advantages Range, mobility Speed, cheap
Disadvantages Relatively slowExpensive
Short range
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: - .Comparisons 3G vs- : -Mobile FI3G MOBILE-FI
Standard WCDMA,CDMA2000 IEEE 802.20
Max Speed 2 Mbps 16 Mbps
Operations Cell phone companies WISPs
License Yes Yes
Coverage Area Several km Several km
Advantages Range, mobility Speed, mobility
Disadvantages Relatively slowExpensive
Cost?
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3G ( . )vs WiFiCombination of the two technologies
prevents the capacity bottleneckassociated with 3G network. If a3G cell is being overloaded, the callor data connection can be handed off
to a WiFi Access-Point.
WiFi is less expensive to deploy then3G networks and can be deployed for
thousands of dollars vs.millions.
Since WiFi has a short range, but
more bandwidth compared to 3G,
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: -ADVANTAGES
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&Business Marketing: -Opportunities
Location basedservices
Internet access
MultimediaMessaging
Customized
infotainment Intranet/Extranet
access
.UMTSfo ru m
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, &Fun with 3G WIFI: -Bluetooth Wireless wakeups revisited: energy management
for voip over wi-fi smartphones, Agarwal et al,2007.
Proposed an architecture to use the GSM radioto wake up the WiFi radio upon an incomingVoIP call to leverage the better quality and
energy-efficiency ofWiFi while keeping itsscanning costs low.
Efficient and transparent dynamic content updatesfor mobile clients, Armstrong et al, 2006.
Application level modifications to reduceenergy consumption for updates to dynamicweb content.
Use a proxy to:-
only push new content when the portion ofthe web document of interest to the user
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Reducing the power consumption of wireless ,mobile devices with multiple radio interfaces, .Pering 2006 Strategies to intelligently switch between.WiFi and Bluetooth
- - : - -Context for wireless context sensitive energy, .efficient wireless data transfer Rahmati et al.2007 Show that intelligently switching betweenWiFi and GSM reduces energy consumptionsubstantially as WiFi consumes less. ,transmission power However in order to avoidthe cost of unnecessary scanning in the face,of poor WiFi availability the authors design,an algorithm that predicts WiFi availability
and the device scans for WiFi access pointsonly in areas whereWiFi is available with.high probability
:Energy Consumption in Mobile Phones AMeasurement Study and Implications for Network, , .Applications Balasubramanian et al 2009
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T H A N K Y O UT H A N K Y O U