02 Cellular
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1&5- 6&*&0)7"* 8$0&%&,, 1&-2"03,C. Pham
Universit de Pau et des Pays de lAdour
Dpartement Informatique
http://www.univ-pau.fr/~cpham
These slides are compiled from several sources:
- Mobile Handset Cellular Network from http://www.slideserve.com/melva/mobile-handset-cellular-network- Florent Dupont, Univ. Lyon- Figures from Stallingss book Wireless Communications and Neworks, 2E-Added information by myself with sources from Wikipedia
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j&0A$:& i")+=)?Improved performance, decreasing cost of delivery
Typicalaverage bit
rates(peak rateshigher)
WEBbrowsing
Corporate data accessStreaming audio/video
Voice & SMSPresence/location
xHTML browsingApplication downloadingE-mail
MMS picture / video
Multitasking
3G-specific services takeadvantage of higher bandwidth
and/or real-time QoS
A number of mobileservices are bearer
independent in nature
HSDPA1-10Mbps
WCDMA2
Mbps
EGPRS473kbps
GPRS171kbps
GSM
9.6kbps
Push-to-talk
Broadbandin wide area
Video sharingVideo telephonyReal-time IPmultimedia and gamesMulticasting
CDMA
2000-
EVDO
CDMA
2000-
EVDV
CDMA
20001x
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8 Time Slots par canal
Dure d'une trame TDMA = 4.62 ms (1250 tr/s)
7500 x 1/13 MHz = 577 s
(7500 priodes de Quartz de mobile)156.25 bit
156.25*1250=270 kbps
temps
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BCCH: Broadcast Control CHannel
SDCCH: Standalone Dedicated Control CHannel
TCH: Traffic CHannel
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Codage de canal Dbit Utile ProtectionCS-1 (away from BTS) 9,05 kbit/s ++CS-2 13,4 kbit/s +CS-3 15,6 kbit/s -CS-4 (near BTS) 21,4 kbit/s -- (aucune protection)
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RA"%/7"* @0"= ^6IS-95 IS-136 & PDCGSM-
EDGE
GPRS
HSCSDIS-95B
Cdma2000-1xRTT
Cdma2000-1xEV-DV/DO
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W-CDMAEDGE
TD-SCDMA
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GSM9.6kbps (one timeslot)
GSM Data
Also called CSD
GSMGeneral Packet Radio ServicesData rates up to ~ 115 kbps
Max: 8 timeslots used as any one time
Packet switched; resources not tied up all the time
Contention based. Efficient, but variable delays
GSM / GPRS core network re-used by WCDMA (3G)
GPRS
HSCSD
High Speed Circuit Switched DataDedicate up to 4 timeslots for data connection ~ 50 kbps
Good for real-time applications c.w. GPRS
Inefficient -> ties up resources, even when nothing sent
Not as popular as GPRS (many skipping HSCSD)
EDGE
Enhanced Data Rates for Global EvolutionUses 8PSK modulation3x improvement in data rate on short distances
Can fall back to GMSK for greater distances
Combine with GPRS (EGPRS) ~ 384 kbps
Can also be combined with HSCSD
WCDM
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