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LTE ADVANCED A REAL OPPORTUNITYTO CHANGE THE WORLD
provided we mercilessly exploit it!
Linda Doyle
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THE WORLD AS WE KNOW IT.
so what is there to change.....
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4
+UNLICENSED
narrowly defined
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afraid
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conservative
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limited market drivers
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slow
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HOW CAN LTE ADVANCED IMPACTON ANY OF THIS?
so the question for the talk is .....
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WHAT IS LTE?
begin at the beginning.....
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1
G, 2G, 3G, LTE
4G
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Long Term Evolution (LTE)
Targeted at high speed mobile broadband
LTE is an OFDMA based technology
Uses SC-FDMA in the uplink to reduce PAPR
LTE supports scalable carrier bandwidths, from 1.4 MHz to 20 MHz
Uses MIMO techniques
LTE supports both frequency division duplexing (FDD) and time
division duplexing (TDD)
Simplified network structure All IP
Support for MBSFN (Multicast Broadcast Single Frequency Network)
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http://www.fcc.gov/pshs/techtopics/techtopics22.html
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TeliaSonera LTE network
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WHAT IS LTE ADVANCED?
moving along.....
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1
G, 2G, 3G, LTE, LTE+, LTE++++++
4G
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Wider-band transmission
Advanced Multi-antenna solutions
Coordinated multi-point transmission
Extended Coverage through Relays and
Repeaters
Backwards compatible with LTE
Some LTE Advanced features
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what they want .....
100 MHz of spectrum, functioning highlyadvanced multiple antenna solutions, densesmall cell coverage and extended reach throughrelay services
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Linda Doyle CTVR, Trinity College
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a) Continuous b) Non-continuous
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carrier aggregation
contiguous non-contiguous
intra-band inter-band
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carrier aggregation
contiguous non-contiguous
intra-band inter-band
antenna issues, RF frontend issues, dynamic resource
allocation issues, optimisation issues, signalling issues etc......
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LOTS OF STUFF
what we know from cognitive radio.....
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cancelling at the edges
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Azarnasab, Ehsan; Kempter, Roland; Patwari, Neal; Farhang-Boroujeny, Behrouz Filterbank
Multicarrier and Multicarrier CDMA for Cognitive Radio Systems. CrownCom 2007.1-3 Aug.
2007 Page(s):472 - 481
filterbank synthesis? sneaking into a standard?
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idea is to get rid of the
cyclic prefix while at the same
time making it easy to
reconstruct i.e. no need for
a complex receiver
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Propagation
path loss
Maximum Doppler shift at
different frequency
and mobile speeds
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using self-knowledge of hardware capabilities
radio-profiling
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Bansal, G., M. J. Hossain and V. K. Bhargava, Optimal and suboptimal power allocation
schemes for OFDM-based Cognitive Radio systems , IEEE Trans. Wireless Commun., 7(11):
4710-4718, Nov. 2008.
high order modulation
low order modulation
higher power
lower power
power loading
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bringing the cognitive mindset to bear ...
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33
+UNLICENSEDLICENSED
carrier aggregations of .....
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+UNDERLAYOVERLAY
carrier aggregations of .....
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overlay
overlay
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OFDM signal containing three cyclostationary signatures based on work by Paul Sutton
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AND
OR OR OR OR OR
AND
Bidder N AND
Bidder 3
Bidder 2
Bidder 1 AND
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MOVES THE POINT OF DIFFERENTIATION .............
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AND HOW WE CAN PUSH THE ENVELOPE
the regulatory details.....
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service and technology neutrality
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dynamic masks?
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traditional masks
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dynamic masks
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http://www.fcc.gov/pshs/techtopics/techtopics22.html
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We could do a similar
analysis here and look at
how the cognitive radio
world will help but will
leave this analysis to AllenMacKenzie and Luiz DaSilva,
who are experts in the field
of cognitive networks..
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50
+
UNLICENSED
exploding the definition of cognitive radio
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cognitive technology a part of life
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it just wont work with conservative rules
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mobile space has lots of market drivers
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a greater imperative to move from command
and control
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its the end of the world as we know it
and I feel fine.
R.E.M. 1998
http://www.youtube.com/watch?v=_eyFiClAzq8&feature=related
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Thanks for listening.
