Cellul ar Step-by-Step Migration to an All-IP Mobile Backhaul Network Presented by: Issar Krausz Business Development senior Manager Customers’ Event Crete, May 2007
CellularStep-by-Step Migration to an
All-IP Mobile Backhaul Network
Presented by:
Issar Krausz
Business Development senior Manager
Customers’ Event
Crete, May 2007
All-IP Backhauling CE 2007 Slide 2
• Backhaul at the Spotlight
• The Challenge
• Transport cost reduction
• Packet-based Transport
• Pseudowires
• New Transport Alternatives for Mobile Backhaul
• Transport for Fixed and Mobile Convergence
Outline
All-IP Backhauling CE 2007 Slide 3
Cellular Backhaul From the Backstage
to the Spotlight
All-IP Backhauling CE 2007 Slide 4
It’s All About Customer ExperienceHigher Speed, Richer Content
GPRS
EDGE
UMTS
HSPA
40 Kb/sec 75 Kb/sec 2 Mb/sec 14 Mb/sec
Internet
Rich call services
Content to person
Messaging
Audio Download
Video Download
Audio Streaming
Video Streaming
Video Telephony
Video Conferencing
SMS
MMS
Interactive Gaming
Internet Surfing
• 1 Minute of audio from MP3 music file equals:
• 132 seconds – GPRS
• 22.4 seconds – UMTS
• 4.1 seconds - HSDPA
All-IP Backhauling CE 2007 Slide 5
• Worldwide mobile subscriber base keeps increasing
• According to Infonetics’ October 2006 report, Mobile Backhaul Equipment,
Installed Base, & Services Market Outlook, there were more than 2 billion
mobile subscribers worldwide in 2005, and that number will jump to over 3 billion
by 2009
• Enhanced user-experience demands higher-speed data rates
• Video streaming, MP3/MP4 downloads, MMS, peer-to-peer applications, Mobile TV
• NG mobile standards and services are within reach
• LTE – 100Mbps
The Rapid Bandwidth IncreaseNo. of E1 Links per Cell-site
2006
82%
12% 6%
1E1 - 2E1
3E1 - 5E1
> 5E1s
33%
28%
39%
Source: Heavy Reading, Dec. 2006
2009
All-IP Backhauling CE 2007 Slide 6
Cell-site Transmission Evolution
• New services = more transport bandwidth right out of the cell-site
• Access becomes the BW bottleneck
• PDH/TDM is not a scalable solution
• HSDPA – the “killer application” for mobile backhaul
2G TDM 1-2 E1/T1
2G BTS
Cell Site
HSDPA ATM Data up to 8 E1/T13G Node B
3G ATM Voice2-4 E1/T1 Transport
NetworkPDH, SDH, LL
All-IP Backhauling CE 2007 Slide 7
HSDPAThe backhaul “killer application”
• Mobile data traffic to double within the next 12-18 months*• Data volumes in backhaul to surge to 3-4 times current levels within 2 years
• Mobile data ARPU will not keep the pace
* According to Strategic Analysis, Nov. 2006
Source: Unstrung Insider
All-IP Backhauling CE 2007 Slide 8
The ChallengeOptimizing the Cellular Backhaul
• Challenge - Handling capacity growth• Backhaul represents 70% of the transport costs
• About 30% of the OPEX (incl. site rental, maintenance, technical sup., etc)
• Evolution to future ready transmission – All-IP and FMC
• Solution – Cost reductions thru• Abis/Ater BW optimization and data compression
• Sharing a single transport network by 2G/2.5G and 3G traffic
• Statistical Multiplexing with traffic prioritization• Iub optimization adapted to HSDPA sales growth/strategy
• Backhauling over alternative technologies and media• Packet-based transport• Using low cost xDSL access
All-IP Backhauling CE 2007 Slide 9
Optimization of A-bis/A-ter Backhaul Links
• Reducing backhaul expenses by more than 50%
• Reduce no. of E1 trunks for BTS-BSC connectivity with no voice quality degradation
• Smallest footprint device in the market – save on co-location costs
• A-bis/A-ter traffic optimization for efficient use of backhaul links – leased lines, satellite links and microwave
• Data Compression
BSC
Vmux-400
A-bisOptimization
TDM/IPTransportNetwork
E1s
Vmux-400E1
A-bisOptimization
E1
GSMBTS
GSMBTS
All-IP Backhauling CE 2007 Slide 10
N x E1 > n x E1
Cut Backhaul Costs thru Aggregation
• Substantial cost savings by
• Aggregation, Grooming, Overbooking/Oversubscription
• Aggregation/grooming of GSM and UMTS traffic onto a unified transport
• Statistical multiplexing of UMTS/HSDPA traffic based on ATM capabilities
• Dynamic bandwidth allocation based on operator’s predefined priorities
• Flexible port configuration to support GSM and UMTS
SDH/SONET/ATM
TransportNetwork
Ethernet
GSM BTS
IP-Node B
ACE-3x00
n x E1/T1 (IMA) STM-1/OC-3
E1/T1sTDM
STM-1/OC-3
ACE-3x00
n E1/T1 TDMCh-STM1/OC-3
2G BSC
Multi-ServiceAggregation
3G RNC
E1/T1sATM IMA
Cell-siteGateway
n x E1/T1 IMA STM-1/OC-3
GbE
All-IP Backhauling CE 2007 Slide 11
What have we achieved so far?
The traditional approach
8-16 E1/T1 for a full service offering
2G TDM 1-2 E1/T1
2G BTS
HSDPA up to 8 E1/T1
3G ATM Voice2-4 E1/T1
3G Node B
Cell Site
Transportnetwork
Savings of over 80 Million Euros/year
Optimized approach
6-8 E1/T1 links
2G TDM 1-2 E1/T1
ACE-3x00
2G BTS
3G ATM 2-4 E1/T1
Cell Site
ATM orSDH/SONET
TransportNetwork
Cell-siteGateway
E1/T1s
3G Node B(*) Further optional reduction using low-cost packet transport
Packet SwitchedNetwork
FE (*)
HSDPA up to 8 E1/T1
All-IP Backhauling CE 2007 Slide 12
What else can be improved?
• There are two main alternatives being considered for
additional backhaul cost reduction
• Using packet-switched transport
• Complement by using DSL access
All-IP Backhauling CE 2007 Slide 13
Why Packet-based Transport?
• Ethernet presents the most scalable and flexible transport solution to
meet the BW challenge right off the cell site
• The cost for leased lines is about 2.5 times
that of new wireline connections
(Ethernet, DSL, cable, PON)
Ethernet Transport Media
CopperFiber
EFMHFC Cable
Microwave
Wireless Mesh xDSL
PON
• Ethernet is a future proof RAN
transport technology
• 3G/3.5G/4G, WiMAX and FMC backhaul
• Ethernet can be extended to the cell
site over various low-cost technologies
• Different types of DSL
• p2p and p2mp (PON) fiber connections
• WiMAX and Ethernet-based radios
• HFC
All-IP Backhauling CE 2007 Slide 15
Lesson in HistoryWhat are Pseudowires?
• Pseudowire is a mechanism that emulates the essential
attributes of a telecommunications service over a packet-
switched network
• TDM leased line, ATM or Frame Relay
• It defines a way to packetize and encapsulate data and create a
logical link between two network entities
• Pseudowire technology is an enabler for circuit emulation and
service emulation of legacy services over packet networks
CLE/CPEPWE3 #1
PWE3 #2
CLE/CPETDM, ATMFR, etc.
LegacyService
PseudowireLegacy Emulated Service
LegacyService
Tunnel
All-IP Backhauling CE 2007 Slide 16
Pseudowire Standards
• RAD is actively involved in most of the standardization bodies
StandardApplicationIETFITU-TMFAMEF
TDMoIPTDM circuit emulationietf-pwe3-tdmoipY.1413, Y.1453,
Y.1414, Y.1452
IA 4.0
IA 5.0MEF 8
CESoPSNTDM circuit emulationietf-pwe3-
cesopsnY.1413, Y.1453IA 8.0MEF 8
SAToPTDM circuit emulationRFC4553Y.1413, Y.1453NoneMEF 8
HDLCoPSNHDLC transportRFC4618NoneNoneNone
ATMoPSNATM service transportRFC4717 Y.1411, Y.1412NoneNone
FRoPSNFrame Relay service
emulationRFC4619X.84NoneNone
All-IP Backhauling CE 2007 Slide 17
Saving with Packet-based Transport“All-IP Transport”
• All-IP unified transport - Future-ready solution• FMC/IMS
• Ready for UMTS Rev.6/7 and over
• All TDM and ATM legacy traffic is transported over pseudowires
• Clock distribution across the packet network• Dedicated ACR (Adaptive Clock Recovery) mechanisms
• Meet the ITU-T G.823 sync. requirements and G.8261 mask
• Evolution to IEEE-1588
PacketSwitchedNetwork
FE GbE
ACE-3x00
n E1/T1 TDM
2G BSC
Multi-ServiceAggregation
3G RNC
n x E1/T1 IMA STM-1/OC-3
GbE
ACE-3x00
Cell-siteGateway
GSM BTS
IP-Node B
UMTSNode B
ETH
E1/T1sTDM
E1/T1sATM IMA
All-IP Backhauling CE 2007 Slide 18
HSDPA Offload1st Migration Step – The Hybrid Approach
• First step of the migration to packet switched network
• Separation of transport to carry
• GSM/TDMA and UMTS real time voice and video over SDH/SONET or ATM
• UMTS HSDPA data traffic mapped to pseudo-wires over PSN
• Ensures QoS for voice and real-time traffic
GSM BTS
IP-Node B
ACE-3x00UMTSNode B
GbE
FE
STM-1/OC-3
n x E1/T1STM-1/OC-3
Signaling and Abis traffic
3G real-time traffic (voice and video)
ATM orSDH/SONET
Access Network
ACE-3x00
n E1/T1 TDM
2G BSC
Multi-ServiceAggregation
3G RNC
ETH
E1/T1sTDM
E1/T1sATM IMA
3G HSDPA and non-delay sensitive traffic (data)
Packet SwitchedNetwork
Cell-siteGateway
n x E1/T1 IMA STM-1/OC-3
GbE
All-IP Backhauling CE 2007 Slide 19
Voice and Real-timeover existing infrastructure
HSDPA overADSL2+/VDSL2 wholesale
GSM BTS
IP-Node B
UMTSNode B
ETH
E1/T1sTDM
E1/T1sATM IMA
The Hybrid Solution over a Wholesale Backhaul Service
• Reduce Opex by using E1/T1 links only for the voice traffic
• Scalable cost-effective broadband transport service over DSL (wholesale)
• HSDPA will serve mainly for Internet access and fast downloads – mobile broadband
• Similar to residential DSL services
• Two options to be considered
• ADSL2+ - applicable for HSDPA (HSUPA may require more UL BW)
• VDSL2 - applicable for HSxPA
ACE-3x00
Cell-siteGateway
GbE
STM-1/OC-3
n x E1/T1STM-1/OC-3
Packet SwitchedNetwork
ATM orSDH/SONET
Access Network
ACE-3x00
n E1/T1 TDM
2G BSC
Multi-ServiceAggregation
3G RNC
DSLAM
DSLModem
ETH
n x E1/T1 IMA STM-1/OC-3
GbE
All-IP Backhauling CE 2007 Slide 20
STM-1GbE
ACE-3x00
n E1/T1 TDM
2G BSC
Multi-ServiceAggregation
3G RNC
ATM or Packet-switched
TransportNetwork
xDSL
DSLAM
LA-130
Cell-siteDSL GatewayWith Bonding
GSM BTS
UMTSNode B
E1/T1sTDM
E1/T1sATM IMA
IP-Node B
ETHMultiple
SHDSL linksor
ADSL2+, VDSL2
Leverage Copper Using DSL
• Leverage existing DSL and DSLAM infrastructure for access to cell sites
• Use multiple DSL links (with copper bonding) for higher bandwidth, longer reach and dynamic adaptivity to available DSL links
• TDM/ATM/Ethernet-over-PSN PW encapsulation over DSL
n x E1/T1 IMA STM-1/OC-3
GbE
All-IP Backhauling CE 2007 Slide 21
GSM BTS
IP-Node B
UMTSNode B
Ethernet
E1/T1sTDM
E1/T1sATM IMA
The Hybrid Approach in a DSL/PSN Environment
• Mix of DSL technologies in a PSN environment
• Differentiate class of service• SHDSL for high quality services
• ADSL2+ and VDSL2 for lower class of service
• Solving reach and BW challenges• SHDSL for symmetrical traffic with long reach and relative low bandwidth
• ADSL2+ for asymmetrical traffic (HSDPA) with mid reach and high download bandwidth
• VDSL2 for symmetrical and asymmetrical traffic with low reach and high bandwidth
LA-130 NG
Cell-site DSL Gateway
GbE
ADSL2+ /VDSL2
n x SHDSL
ACE-3x00
n E1/T1 TDM
2G BSC
Multi-ServiceAggregation
3G RNC
Next
Step
n x E1/T1 IMA STM-1/OC-3
GbE
ATM or Packet-switched
TransportNetwork
DSLAM
All-IP Backhauling CE 2007 Slide 22
A Glance at the Transport for Fixed-Mobile Convergence
All-IP Backhauling CE 2007 Slide 23
GSM BTS
IP-Node B
UMTSNode B
ETH
E1/T1sTDM
E1/T1sATM IMA
ResidentialDSLAM/CMTSTriple
Play
Backhaul over the Fixed and Mobile Converged Transport
• Single packet-switched infrastructure for multiple mobile and wireline services
• Aggregation of 2G TDM traffic and 3G ATM traffic onto the Triple/Quadruple Play and business services infrastructure
• Tunneling of legacy traffic using standard pseudowire technologies• TDM/CESoPSN and ATMoPSN based on IETF standards
ATM
ETHETHPacket
SwitchedNetwork
TDM
ACE-3100/3200ACE-3x00
3G RNC
2G BSC
ISP
Cell-siteGateway
Multi-ServiceAggregation ETH
Business
All-IP Backhauling CE 2007 Slide 24
Leverage the IP DSLAM Infrastructure
• Further integration for full FMC implementation• Utilize the same infrastructure as the one used for IPTV
Residential
TriplePlay
IP DSLAM2G BSC3G RNC
ACE-3400
GbE TDMPacket
SwitchedNetwork
ATMEthernet
TDM/ATMoPSNAggregation Device
ISP
New
Trend
xDSL LA-130
Cell-siteDSL GatewayWith Bonding
GSM BTS
UMTSNode B
E1/T1sTDM
E1/T1sATM IMA
IP-Node B
ETHBusiness
All-IP Backhauling CE 2007 Slide 25
…and one more to go
All-IP Backhauling CE 2007 Slide 26
Voice TrunkingBW savings in the Inter-MSC Links
• Significant cost savings • Up to 16:1 voice compression ratio
• Excellent voice quality for customers satisfaction
• Fast ROI – less than 6 months
• Future proof - supports TDM and IP networks for seamless migration to NG transport
• Supports all types of signaling
• Optimized HDLC/SS7 signaling transport
E1s
E1s
STM-1
Gmux-2000
STM-1
Gmux-2000
MSC
MSC
MSC/BSC
Vmux-2100 E1s
MSC Site
MSC Site
Remote MSC Site
Voice Trunking
Voice Trunking
Voice Trunking
E1s
TDMNetwork
All-IP Backhauling CE 2007 Slide 27
Migration to IP Backbones
• Leverage the existing backbone segments while introducing NG-MSC switches
STM-1
Gmux-2000
STM-1
Gmux-2000
MSC
MSC
MSC/BSC
Vmux-2100 E1s
MSC Site
MSC Site
Remote MSC Site
TDMNetwork
MEGACO
MEGACO
MEGACO
NG-MSCSoftswitch
NG-MSC
VoIP
IPNetwork
NG-MSC
VoIP
Voice Trunking and Media Gateway
Voice Trunking and Media Gateway
Voice Trunking and Media Gateway
All-IP Backhauling CE 2007 Slide 28
…to wrap up
All-IP Backhauling CE 2007 Slide 29
2G/3G Aggregation TDM/ATM
IP DSLAM
ATM DSLAM
Migration to All-IPCellular Network
LTE/WiMAX
GSM/GPRSBTS
UMTS/HSDPANode B
CDMABTS
CDMA 2000Node B
BSC/RNC
2G/3G Backhaul over xDSL TDM/ATM
ATM
HSDPA TrafficSegregation TDM/ATM
ETH
E1/T1Clock Distributionover PSN
PSNEthernet/IP/MPLS
n E1/T1
n E1/T1
n E1/T1
STM-1/OC-3TDM/ATM
DSL
DSL
ATM
n E1/T1
n E1/T1
ETH
Abis/Ater/A/E Optimization
n E1/T1
TDM
Conversionto PSN
PDH/SDH