rev a2003-11-071 knowledge, what is it? a mobile communications case study dr. jan uddenfeldt chief...
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Rev A 2003-11-07 1
Knowledge, what is it?A mobile communications case study
Dr. Jan Uddenfeldt
Chief Technology Officer
Ericsson, Stockholm, Sweden
Rev A 2003-11-07 2
1880 19471878 1910 1986-96 2001 2002
Rev A 2003-11-07 3
Knowledge, seen from a hi-tech company point of view
• What can be done?
• What does the end user want?
Rev A 2003-11-07 4
Scientific experts, a driver in technology , but …
….different specific expertise often drive the technology in different directions.
Rev A 2003-11-07 5
Scientific experts, a driver in technology , but …
…..different specific expertise often drive the technology in different direction.
However,
cross discipline cooperation boosts the knowledge and the borderlines between disciplines hide a huge potential.
Rev A 2003-11-07 6
John C. Harsanyi (János)„The most important scientific
results are born, if the researcher works in several
disciplines, and transfers his knowledge and results to
another - perhaps far away –
discipline.”
Rev A 2003-11-07 7
Mobile telephony evolution
1980 1990 2000
Start of NMT Start of GSM Start of 3G
2G
Voice & DataVoice
3G
Multimedia & Internet
1G
Rev A 2003-11-07 8
No
of
Su
bsc
riptio
ns
(mill
ion
)
(Year -end)
GSM & WCDMA – One True Family
Mobile subscriptions by system standard
0
400
800
1200
1600
2000
2000 2001 2002 2003 2004 2005 2006 2007 2008
GSM/GPRS/EDGE/WCDMA
PDC
TDMA
CDMA/CDMA2000
Analog & Others
Source: Ericsson Wireless Subscription Forecast 2003_2
Rev A 2003-11-07 9
GSM into 3G
Content
CommunicationServices
Core NetworkFixed & MobileTelephony
(~2B subscribers)
Internet/Intranet(0.4B+ subscribers)
Radio NetworkGSM/GPRS/EDGE
Radio NetworkWCDMA/WCDMA-Evolved
Dual Mode Terminals
Rev A 2003-11-07 10
WCDMA worldwide – 3G Here & Now
September 2003 ~ # of subs*DoCoMo** 1000 k
J-Phone** 84.3 k
3-Italy** 374 k
3-UK 194.6 k
3-Australia** 69 k
3-Sweden** 11.6 k
3-Austria 10 k
Mobilkom
(Austria) **
1 k
Tango (Lux)** 1 k
Total launched ~1745 k
* EMC Research + External Websites + Internal Ericsson ** Ericsson is supplier to these 7 of 9 operators who have launched NWs
Rev A 2003-11-07 11
What the End User wants
• Higher data rates• Low cost
Wideband
Rev A 2003-11-07 12
Technologies
1G 2G 3G
Analog GSM WCDMA
Number of users per radio channel
1 8 ~100
Data rate for end user
< 5 kb/s < 64 kb/s < 2 Mb/s
Rev A 2003-11-07 13
Driving the market through R&D
1980 1990 2000 2010
WCDMA
CDMA2000
EDGE
GPRS
WAP
Bluetooth
GSM
4G
Leadership in Mobile Internet
Leadership in mobile telephony
Rev A 2003-11-07 14
Optimised IP/3G
Internet Knowledge
Radio Knowledge
Coding Knowlegde
Non optimised IP
Cellular voice
Interdisciplinary thinking
Rev A 2003-11-07 15
Technology Challenges
Radio propagation is extremely complex data rate limitation transmission errors
Spectrum is a scarce resource spectrum efficiency and compression complex signal processing
Users move over very large areas roaming and handoff
Rev A 2003-11-07 16
Mobile radio propagation is...
Frequency dispersive• Due to Doppler spread (~ 100 Hz)• Rapid time variations and deep fades creating high Bit
Error Rates (10 -1)
Time dispersive• Due to reflections giving time delay spread (~10s)• Limits data rates
Rev A 2003-11-07 17
Know-how evolution
When Knowledge Implications
70’iesBit rate must be longer than delay spread
~25 kHz bandwidth
80’ies
New innovative adaptive equalizers allow multiple bits within delay spread
~200 kHz bandwidth
90’ies
High speed circuits allow wideband CDMA with Rake-receivers
~5 MHz bandwidth
Rev A 2003-11-07 18
Mobile Media- Evolution with new capabilities
Rev A 2003-11-07 19
Mobile Media services[kbps]
256
128
64
32
16
8
Visualcontent
256128643216842 [kbps]
Audio content
Sports
Music
News
Rev A 2003-11-07 20
Mobile Media services enabled by 2,5G and 3G[kbps]
256
128
64
32
16
8
Visualcontent
256128643216842 [kbps]
Audio content
2,5G
3G
Rev A 2003-11-07 21
Loading...
Loading….
2G 3G
Rev A 2003-11-07 22
2G 3G
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