Title: Knowledge, what is it A mobile communications case study
1Knowledge, what is it?A mobile communications
case study
- Dr. Jan Uddenfeldt
- Chief Technology Officer
- Ericsson, Stockholm, Sweden
21880
1947
1878
1910
1986-96
2001
2002
3Knowledge, seen from a hi-tech company point of
view
- What can be done?
- What does the end user want?
4Scientific experts, a driver in technology , but
- .different specific expertise often drive the
technology in different directions.
5Scientific 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.
6John 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.
7Mobile telephony evolution
3G
2G
Multimedia Internet
1G
Voice Data
Voice
1980
1990
2000
Start of NMT
Start of GSM
Start of 3G
8Mobile subscriptions by system standard
No of Subscriptions (million)
(Year -end)
Source Ericsson Wireless Subscription Forecast
2003_2
GSM WCDMA One True Family
9GSM 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
10WCDMA worldwide 3G Here Now
EMC Research External Websites Internal
Ericsson Ericsson is supplier to these 7 of 9
operators who have launched NWs
11What the End User wants
- Higher data rates
- Low cost
-
- Wideband
-
12Technologies
13Driving the market through RD
GSM
Leadership in mobile telephony
WCDMA
CDMA2000
EDGE
Leadership in Mobile Internet
GPRS
WAP
Bluetooth
4G
1990
2000
2010
1980
14Interdisciplinary thinking
Non optimised IP
Optimised IP/3G
Cellular voice
15Technology 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
-
16Mobile 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
17Know-how evolution
18Mobile Media- Evolution with new capabilities
19Mobile Media services
Sports
Music
News
Audio content
kbps
256
128
64
32
16
8
4
2
20Mobile Media services enabled by 2,5G and 3G
3G
2,5G
Audio content
kbps
256
128
64
32
16
8
4
2
212G 3G
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222G 3G
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