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Fraunhofer
Heinrich Hertz Institute
Fraunhofer Heinrich Hertz Institute, Einsteinufer 37, 10587 Berlin www.hhi.fraunhofer.de
Dr.-Ing. Thomas Haustein
Wireless Communications and Networks, Fraunhofer HHI
1
5th Generation of Wireless Communication
Panel Discussion ISWCS 2013, Ilmenau
Wireless Communications
and Networks
©
Wireless Gigabit Connectivity
E.g. 3D streaming ~100 Mbit/s, but download is expected 100 times
faster: Wireless data kiosk (~ 10Gbit/s) content download
29.08.2013 2
Application Challenges
Internet of Things: the next killer application
Scalability problems (>100k nodes in a cell):
Thomas Haustein, Fraunhofer HHI Berlin
Wireless Communications
and Networks
©
Fragmented Spectrum and the spectrum paradox:
Spectrum scarce and expensive but underutilized
White Spaces communication: 100x better localization, PAPR issues
Tactile Internet (Real-time cyber-physical tactile control)
Toughest constraint: human tactile sensing (distinguishes latencies in
the order of 1ms)
1ms round-trip: time budget on PHY: max 100µs
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Application Challenges
100ms 10ms 1ms
Thomas Haustein, Fraunhofer HHI Berlin
Wireless Communications
and Networks
©
super-high rate, low
latency, increased
signaling
vast # M2M devices
low rate, low complexity,
low cost
flexible fine-grained
sharing of fragmented
spectrum
heterogeneous networks,
vertical layering,
frequency reuse > 1
Selected Reference Scenarios
4
Wireless Communications
and Networks
©
Application Challenges:
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Wireless Access:
• flexible
• scalable
• content aware
• robust
• reliable
• efficient (energy, spectrum)
Vision: Unified Frame
Structure
Wireless Communications
and Networks
©
4G Status and Pitfalls
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However, emerging trends reveal major pitfalls:
MTC communications: bulky procedures to ensure strict synchronism
Collaborative schemes: tremendous efforts to collect gains under the
premise of strict synchronism and orthogonality
Digital Agenda/Carrier aggregation: forces systems to deal with
fragmented spectrum
Localized Communication: communication sources and sinks might be
in proximity direct comm or meshed comm w/o fixed infrastructure
Special Application Requirements: reliability, latency, event triggering
delay might be outside of standard cellular requirements
Heterogeniouty: in Network Arcitectures, Deployments and Applications
Wireless for Everything: Access, Backhaul, Fronthaul, Direct Comm
LTE tailored to maximize performance by enforcing strict synchronism
and orthogonality.
Thomas Haustein, Fraunhofer HHI Berlin
Wireless Communications
and Networks
© 7
PHY, MAC and Network Layer
Design
Spectrum Access Rules and
Guidelines
Fragmented &
new Spectrum
parts Asynchroneous
carrier aggregation
& High Carrier
Frequency Signal
Processing
MTC
Enable
asynchroneous MTC
traffic with
drastically reduced
signalling
CoMP/
HetNet
Provision of
asynchronous
CoMP/HetNet
concepts
Holistic Approach for Heterogeneous Wireless
Infrastuctures, Systems and Applications
5G Wireless Eco-System
Wireless Communication (Context, Content, Location
aware - Autonomy vs. Controlled )
Wireless Communications
and Networks
©
Unfied Frame Vision for
Lower Part of Spectrum (< 6 GHz)
• Classical “bit pipe” traffic (type I) with high-
end spectral efficiency exploits orthogonality
and synchronicity, wherever it is possible,
e.g. when serving cell-centre users.
• Vertical layering at common time-frequency
resources generates a non-orthogonal signal
format supporting interference limited
transmissions more efficiently
(heterogeneous cell structures and cell
edge). For high-volume data applications in
those cell areas (type II), a multi-cell, multi-
user transceiver concept is required.
• Machine-Type Communication (MTC) is
expected to be one dominant application of
5G systems. For this sporadic traffic type
(type III), a contention based-access
technique is attractive, saving overhead by
dropping the strict synchronicity requirement.
• Sensor-type traffic (type IV), the open
weightless standard [3] has shown that, from
an energy-efficiency perspective, it is
beneficial to stretch the transmissions in
time by spreading.
29.08.2013 8 Thomas Haustein, Fraunhofer HHI Berlin
Wireless Communications
and Networks
©
Use the mm-wave bands
Access link
Fronthaul link
Backhaul link
Device to device links
Establish an overlay network
where and when high capacity /
data rate is needed
Seamless integration into 3GPP
standards
Full indoor & outdoor mobility
support
Cost & energy reduction
High Data Rate Communication in
Higher Part of Spectrum (> 10 GHz)
RRU: Remote radio unit
BBU: Base band unit
mm-Wave link
RRU
Core network
BBU
Bac
khau
l lin
k
Device 2 Device
Link
9 Thomas Haustein, Fraunhofer HHI Berlin 29.08.2013
Wireless Communications
and Networks
©
Wide Band and Millimeter Wave
Cellular Overlay Concepts
29.08.2013 10 Thomas Haustein, Fraunhofer HHI Berlin
Wireless Communications
and Networks
© 29.08.2013 11
Thank you for your attention!
Contact:
Dr.-Ing. Thomas Haustein – [email protected]
www.hhi.fraunhofer.de/wn
Fraunhofer Heinrich Hertz Institute
Berlin, Germany
Thomas Haustein, Fraunhofer HHI Berlin
