We would like to invite you to an exclusive webinar entitled 'Towards a Converged Network: Transport Network Strategies at Telekom Austria. This will present key new research findings from Maravedis-Rethink, and will feature our guest speaker, Alexander Schneider. Mr Schneider is head of transport network development at Telekom Austria Group, a frontrunner in European operators' move towards fixed/mobile convergence and all-IP networks.
Mr Schneider will discuss key elements of Telekom Austria's strategy for deploying a twenty-first century network which harnesses some of the most important new technologies in fixed and mobile telecoms. These include small cells, software defined networking and the migration to all-IP infrastructure. In particular, the presentation will focus on the strategies and challenges in backhaul and IP migration.
The webinar will offer a unique opportunity to gain details and insights into issues which are now facing many operators, and their suppliers, round the world, in the face of mounting data demands.
Mr Schneider's presentation will be complemented by highlights from Maravedis-Rethink's most recent research into the 4G RAN and backhaul deployment plans of the world's leading mobile providers. Maravedis-Rethink tracks the top 100 4G operators and their business strategies, and has a per-carrier analysis of small cell and Cloud-RAN deployment plans, among other topics. Research Director Caroline Gabriel will share exclusive data in areas including small cell backhaul and SON (self-optimizing networks).
17. 17
Content Table
1 Group Overview
2 Group Backbone
3 Convergent Network Strategy
4 Transport NW Development a IP/MPLS
b
c
d Small Cell Backhauling
DWDM
Ethernet MW
e Migration to All IP
f
g
h SDN
Security
Synchronization
18. 18
Telekom Austria Group: Who We Are
> One of the leading
communication providers in
Central and Eastern Europe
> We operate in eight countries.
> Our almost 17,000
employees deliver
> Products and services of voice
telephony, broadband Internet,
multimedia services, data and IT
solutions, wholesale as well as
m-payment solutions
> For more than 23 million
customers across our markets of
operations.
Home Overview Brand Facts OpCos History Innovation CSR Holding Vodafone
21. 21
TAG develops it´s companies differentiated based on market
maturity, regulatory conditions and competitive situation
towards full communication providers
TAG MARKET EVOLUTIONARY PATH
Single Brand Multibrand
Mobile
Only
Convergent
Segmentation
MarketApproach&Offering
Austria
Slovenia
Bulgaria
Serbia
Croatia
Belarus
Macedonia
Full communication provider to
exploit all growth opportunities
Multibrand strategy to exploit
new mobile market segments
and protect the main brand
• Push operations to achieve
significant size.
• Focus on mobile-only
strategy & screen for
convergence entry
opportunity
21
23. 23
TAG Fixed Access Networks: Further Goals
23
> Reduction of leased lines
> Faster connection of mobile sites through fiber
> Consolidate the transport network
> Reduce the number of PoP locations and network elements
> Offloading Data traffic from cellular to fixed nw in home environment
25. 25
IP MPLS for Core and converged Backhaul
Telekom Austria Group issued an RFP in 2011 and selected 2 vendors for the group.
Access Service Edge
Internet
Aggregation
MSAN/DSLAM/
OLT
Core
Video
Voice
Gateway
10GE
GE
Customer Site
FE
E1/
MLPPP/TDM PW
Customer
CPE L2/L3 VPN
VoIP
TV 3-Play
L2/L3 VPN
xDSL/
FTTx
MPLS VPN
40/100GE
Mobile
RNC/EPC
PDH (microwave)
chSTM1/MLPPP/
TDM PW
Mobile
BSC/RNC
Core 1
Core 3
Agg 1
Agg 3Agg 2
Acc 1
Acc 2
nxE1
DHCP, Radius
Core 2
S C O P E O F R F P
8 Node
Types:
Core1
Core2
Core3
Agg.1
Agg.2
Agg.3
Acc.1
Acc.2
26. 26
Optical Layer
Telekom Austria Group TAG issued an RFP in 2012 for Metro/Access
WDM and selected 2 vendors for the group.
The Core WDM Layer shows 3 vendors in TAG, no RFP last year and
this year because book values still high compared to new
investment.
Cross layer optimization between the optical layer and the IP layer
is done in order to optimize the transport cost.
27. 27
Fiber vs. Microwave Decision Tree
Fiber Invest < x
AND possible to
construct until T ? Build Fiber
MW possible ? Build MW
Copper possible? Build Copper
yes
yes
yes
no
no
no
Fiber BC positive ? Build Fiber
Do nothing
yes
no
Fiber 60% - 70%
MW 30% - 40%
Copper 0% - 1%
x= Microwave TCO
Resulting Technology split for Mobile Backhaul
in A1 (incumbent operator):
28. 28
Ethernet Microwave
Telekom Austria Group TAG issued an RFP in 2009 and selected 1 vendor for the group.
Short Haul only
Telekom Austria Group issued an RFP in 2012 and selected 2 vendors for the group
Short Haul
Long Haul
E Band
Fiber and
Ethernet Microwave
are the main pillars
For Mobile Broadband
1Gbit/s1Gbit/s
Fiber
MW in the last hop for
rapid and cost effective
Roll out of mobile
networks. Fiber Roll out
for converged network.
29. 29
Small Cell Backhauling Concept
29
TAG has defined a concept for Small Cell Backhauling
Depending on the use case (e.g. capacity hot spot or indoor coverage) there
is a toolset of technologies already defined in TAG (E Band MW, Fiber, TDD
LTE, xDSL, Coax, Low Band MW)
Additional focus needs to be put on V Band Microwave (60 GHz)
• Higher attenuation reduces interference and allows frequency reuse of 1
• Wider beam allows fast mounting on lamp post and insensitivity to
misalignment and wind
• Low Cost all outdoor equipment with small footprint
• Low installation cost with “auto alignment” for mass deployment
30. 30
Migration of the Backbones from Legacy to IP
30
• All national Backbones in TAG are IP/MPLS capable
• However in most OpCos SDH is still in place.
• There are no new investments in SDH, new services are
provisioned on the IP/MPLS backbonde, existing services are
migrated from SDH to IP/MPLS whenever possible and as soon as
possible.
• Traffic reduction in the SDH network allows to reuse parts as
spare.
• Timeline SDH Phase out until 2018
31. 31
Migration of the Backhaul from Legacy to IP
31
Hypothetical distribution of Backhaul connections over time if TAG goes to All IP
(only IP) in the Backhaul Network by the end of 2017. The figures below the graph
indicate the year. The distribution shown until 2013 reflects the real situation.
Year
8 9 10 11 12 13 14 15 16 17
#BackhaulConnections
SRAN IP
4G IP
3G IP
3G ATM
2G TDM
32. 32
Security Strategy for LTE Backhaul
32
3GPP Technical Specification 33.401, recommends the following approach:
“if your are using shared or unsecure transport networks you should
encrypt traffic”.
Transmission of LTE user plane and control plane data should be regarded as
unsecure/untrusted in several cases:
• transport domain/infrastructure (e.g. leased lines) not owned by OpCo
• locations of eNodeBs are not owned by OpCo
• Radio Access Network (RAN) or other network equipment is shared with other
operators
In such a scenario, an operator should deploy a VPN gateway (security gateway) in
order to encrypt the LTE traffic in the backhaul network:
• Backhaul traffic between eNodeBs and mobile core network
• Backhaul traffic between eNodeBs
34. 34
Synchronization Strategy
34
Investment for synchronisation within TAG is mainly driven by the need to deliver
accurate frequency to the air interfaces of ~20.000 Radio sites especially when
migrating from TDM to IP.
For TDM-based aggregation networks (SDH/E1) every site can derive frequency in
sufficient quality via its network interface.
For base station sites without E1-uplinks (eg. SRAN with GbE-uplink) there are today
two standardised solutions for NodeB synchronisation.
• Synchronous Ethernet - SyncE
• Precision Time Protocol PTP - 1588v2
TAG shall use these two technologies in combination
35. 35
Synchronization Strategy – Frequency
35
Migration from SDH to Synchronous Ethernet requires that all Network Elements in
the chain support Synchronous Ethernet.
36. 36
Synchronization Strategy - Time
36
• PTP 1588v2 will be needed at the point of time when phase- and time of
day (ToD) sync is needed for some LTE_advanced features. SyncE will be
also a backup for 1588 Time synchronization and it will improve the
accuracy/robustness of the 1588 time synchronization.
• Time/Phase source could be taken from national timekeeping
organisations (e.g. for A1 from Austrian “Bundesamt für Eich- und
Vermessungswesen”). This has got the advantage that the government
has to make the strategic decision where to get the time information
from which may affect the national security.
• GPS based Time sources and NTP are not seen to be the future primary
timing reference for TAG Transport Networks.
37. 37
Phasing out legacy technologies
PDH Microwave will be replaced with Ethernet MW in the next years.
Today more Ethernet MW links in operation than PDH MW links.
ATM will be replaced with IP/MPLS in the next years.
Outphasing of SDH in the fixed network will be done later. SDH will
be here to stay for some more years.
Other technologies like Frame Relay, X.25 etc. have been phased out
already.
38. 38
Software Defined Networks SDN
TAG introduces SDN and NFV (Network Function Virtualization) in
the Core and IT (Datacenters) now and will introduce it in the
Transport in the mid term future.