TOWER OVERLAY

TOWER
OVERLAY
The IBC 2014 demonstrator
At IBC 2014 we show the “Tower Overlay over LTE-A+”
live. Our hybrid modulator generates a DVB-T2 signal
with LTE-A+ embedded in Future Extension Frames.
The signal is transmitted in TV channel 31 (554 MHz).
Two terminal devices receiving the signal live are on
display. A traditional TV set capable of receiving
DVB-T2 presents the TV content. A tablet PC shows the
LTE-A+ video transmitted inside the FEFs. The
demonstration is enabled by use of the powerful
Software Defined Radio (SDR) framework developed by
IfN.
FEF
LTE-A+
Hybrid Modulator
Schleinitzstraße 22
38106 Braunschweig
Germany
Phone:
Fax:
Web:
Mail:
+49 (531) 391-2474
+49 (531) 391-5192
www.ifn.ing.tu-bs.de
[email protected]
TV Set
Prof. Dr.-Ing.
Ulrich Reimers:
Stefan Ilsen:
Frieder Juretzek:
Daniel Rother:
Partners:
GatesAir, Inc.
TDF
DVB-T2
Receiver
(554 MHz)
DVB-T2
Data
Technische Universitaet Braunschweig
Institut fuer Nachrichtentechnik
Modified
LTE Modem
(554 MHz)
LTE-A+
Modulator
DVB-T2
Modulator
No LTE-A+ capability required!
Contact
[email protected]
[email protected]
[email protected]
[email protected]
Receiver Prototype
No DVB-T2 capability required!
Extending LTE-A+
by a Tower Overlay
TOWER
OVERLAY
A “Tower Overlay over LTE-A+“ - Why?
The number of Tablet PCs and Smartphones in use
around the world is growing rapidly. Their displays
support high quality video. All available market
analyses suggest that the use of video on such devices
will grow exponentially. Video will increasingly be
watched live – specifically during large events such as
Olympic Games. In the past, systems such as DVBH(andheld) tried to address this market. Outside of
Asia none of them succeeded. Cellular networks will
not be able to cope with the growing demand for live
video and it will not be eﬃcient to distribute live video
and audio @ 1.4 Mbit/s or more in thousands of
network cells and possibly by several mobile network
operators in parallel.
Institut fuer Nachrichtentechnik (IfN) of Technische
Universitaet Braunschweig has developed a new
approach to deliver high-quality video to Tablet PCs
and Smartphones. Video is delivered over a High
Power High Tower network and is received by devices
which are LTE-A+ enabled and logged in the cellular
network of an MNO via which all signaling is provided.
Several MNOs can easily share this service without
loading their networks with live video. The approach
shown at IBC 2014 uses DVB-T2 as the carrier of the
LTE-A+ downlink. The LTE-A+ signals are embedded in
Future Extension Frames (FEF) oﬀered by the DVB-T2
standard.
High Power High Tower Networks exist already – they
are used for terrestrial TV transmission. DVB-T2 is the
most advanced terrestrial broadcast standard. It is in
use in many countries of the world. In order to
facilitate the migration from classical broadcasting to
delivering high-quality video to LTE-A+ devices we use
DVB-T2 as the carrier. FEFs support the delivery of
non-DVB-T2 signals inside the data stream, so LTE-A+
terminals don‘t require DVB-T2 tuners. Other carriers
will be possible in the future – such as ATSC 3.0, or
FOBTV, or a specific LTE-A+ solution.
f
DVB-T2/LTE-A+ carrier
…
t
Cisco VNI
Mobile 2014
DVB-T2
Modulator
Total
of which
Video
8000
Ericsson
Mobility Report
Aug. 2014
4000
Total
of which
Video
2013
2014
2015
2016
2017
2018
LTE-A+ is a working title used by IfN for a possible next
generation LTE solution.
DVB-T2
Data
DVB-T2 FEF DVB-T2 FEF DVB-T2 FEF
Data LTE-A+ Data LTE-A+ Data
LTE-A+
Regular LTE Cells: unicast services
Tower Overlay: broadcast, multicast
LTE-A+
Modulator
12000
PB/month
Delivering DVB-T2 and LTE-A+ signals
on a single carrier
Growth of mobile data traffic
16000
0
The concept of the
Tower Overlay over LTE-A+
FEF
LTE-A+
Hybrid Modulator

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