Knowledge, what is it A mobile communications case study

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Knowledge, what is it?A mobile communications
case study

• Dr. Jan Uddenfeldt
• Chief Technology Officer
• Ericsson, Stockholm, Sweden

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1880
1947
1878
1910
1986-96
2001
2002
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Knowledge, seen from a hi-tech company point of
view

• What can be done?
• What does the end user want?

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Scientific experts, a driver in technology , but

• .different specific expertise often drive the
  technology in different directions.

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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.

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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.
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Mobile telephony evolution
3G
2G
Multimedia Internet
1G
Voice Data
Voice
1980
1990
2000
Start of NMT
Start of GSM
Start of 3G
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Mobile subscriptions by system standard
No of Subscriptions (million)
(Year -end)
Source Ericsson Wireless Subscription Forecast
2003_2
GSM WCDMA One True Family
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GSM into 3G
Content
Communication Services
Fixed Mobile Telephony (2B subscribers)
Internet/Intranet (0.4B subscribers)
Core Network
Radio Network GSM/GPRS/EDGE
Radio Network WCDMA/WCDMA-Evolved
Dual Mode Terminals
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WCDMA worldwide 3G Here Now
EMC Research External Websites Internal
Ericsson Ericsson is supplier to these 7 of 9
operators who have launched NWs
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What the End User wants

• Higher data rates
• Low cost
• Wideband

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Technologies
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Driving the market through RD
GSM
Leadership in mobile telephony
WCDMA
CDMA2000
EDGE
Leadership in Mobile Internet
GPRS
WAP
Bluetooth
4G
1990
2000
2010
1980
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Interdisciplinary thinking
Non optimised IP
Optimised IP/3G
Cellular voice
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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

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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
  (10?s)
• Limits data rates

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Know-how evolution
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Mobile Media- Evolution with new capabilities
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Mobile Media services
Sports
Music
News
Audio content
kbps
256
128
64
32
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8
4
2
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Mobile Media services enabled by 2,5G and 3G
3G
2,5G
Audio content
kbps
256
128
64
32
16
8
4
2
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2G 3G
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2G 3G
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