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Solving the LTE Backhaul Challenges
PLNOG12
Warsaw, March 2014
Over 10 years of CE experience
Sofware-enhanced, applicaton aware hardware
Carrier-grade systems and applicatons
Common Management System and Product Strategy
Founded in 1988
Over 1,000 Global Customers
– Tier 1 & 2 Service Providers
– Content Delivery Networks
– Regional Networks
– Datacenter Operators
Billions of dollars of feld-proven installed base
Cohesive mult-layer product portolio
MRV Communicatons at a Glance
Packet Solutons
2
Over 25 years ofoptcal experience
E1/T1 to 100Gbps
Optcal transport, WDM, optcal switching
Flexible design, intelligent networks
Optcal Solutons
Mobile Networks are in Transiton; Many Changes Are Underway
3
Massive Data trafc growth, video acceleraton, and more subscribers
challenge current network architecture
Source: TeliaSonera$
Source: GSA Evoluton of LTE –
17 Feb. 2014
How to Keep the ARPU?
Mobile Network Evoluton – it’s all about data…
4
2.5G > 3G > 3.5G > 4G
A Day in a Wireless Network - the Changing Reality
5
Wi-Fi
Network
Cellular
Network
Broadband
NetworkFemto
Cell
2
1
3
Always-on Data Connection
HSPA
LTE
Cloud RAN
4G LTE – The Highlights
All IP architecture
– Distributed intelligence and self-optmized network
– An all IP based system with IP based protocols used on all interfaces
– Etherent transport
Higher data capacity & beter spectral efciency
Very low latency
Reduced OpEx & CapEx
More small cells
6
X2
EPC
MME SGW
S1
4G LTE Trafc Paths and Mult-point E-LAN
7
X2X2
X2
EPC
MME SGW
S1 S1S1
S11
X2-U and X2-C
to eNodeB
S1-U to SGW
S1-C to MME
Aggr’ EPC
Ethernet
IP
MPLS
Access
Access RAN:
- Fiber/PON
- Microwave
- Cable DOCSIS3
- DSL
- Wi-Fi
4G LTE Key Networking Requirements & Challenges
High-capacity scalable transport
QoS is needed to support GBR & MBR classifcaton types
– Critcal trafc can be prioritzed for multple diferent cell sites
– Manage congeston in the last mile RAN
Fault isolaton and service resiliency
Service OAM
Timing & synchronizaton
Multcastng for sofware distributon, gaming, video etc.
IPv6 will become a major design consideraton
IPSec tunnel when using untrusted networks
8
Metro Ethernet Forum Standpoint: MEF 22.1 Spec
ITEM MEF 22 (2009) MEF 22.1 (NEW)
UNI
Service Types
Link OAM
Service OAM FM
CoS Performance Objectves
Packet-based synchronizaton (IEEE 1588v2)
Network-based synchronizaton (SyncE)
Resiliency Performance
GSM, WCDMA, CDMA2000, WiMAX 802.16e
4G/LTE
Underpinning MEF Specifcatons MEF 6,10MEF 6.1, MEF 10.2
MEF 23.2, MEF 30
9
QoS & Mult-CoS Drivers in Mobile & Wholesale Model
High Priority Lane
Medium Priority LaneLow delay & loss tolerant
Delay-sensitve real tme data
Low Priority LaneBursty, delay & loss tolerant data
SP 1SP 1
SP 2SP 2
SP 3SP 3
SP 4SP 4
Wholesale Access
10
Critcal trafc is segregated and prioritzed
Synchronizaton Requirements
Mobile Network Architecture Frequency Sync Time-of-day / Phase Sync
CDMA2000
GSM
UMTS-FDD
LTE-FDD
UMTS-TDD
LTE-FDD with advanced features
LTE-TDD
Mobile WiMAX
TD-SCDMA
Sync Sources:
1. GPS
2. Legacy TDM
3. Protocol-based
4. SyncE
5. Combinatons
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Networking Protecton Mechanisms
Combinaton between logical & physical topologies
Service integrity health checks
Various optons & layers to choose
– Physical layer LOS 1:1
– L2 Link aggregaton (IEEE)
– L2 ring & linear (ITU-T)
– Fault thresholds & actons based on OAM
– IP routng protocols
– IP/MPLS (BBF TR-221)
– MPLS-TP (BFD & ETH-OAM)
– Combinatons of L1/L2/L3
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Small Cells: Femto, Pico, Micro and Metro cells
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Pico Cell
Femto Cell
Broadband
NetworkCellular
LTELTE
Hotspot
Wi-Fi
devices
50 billion M2M connected devices are forecast by 2020
Connectons to Cells – Technology Choices
Bandwidth Pros Cons
ADSL / VDSL From 25M to 100Mbps Good rato for distance/ bandwidth Requires multple pairs
Shared medium
HFC DOCSIS 30Mbps; +100Mbps Large availability in America Shared medium
Microwave (60-80Ghz) 100Mbps to Gbps High capacity & coverage Requires LOS
Wi-Fi 100Mbps Rapid deployment & cost Quality & spectrum
PLC 100Mbps over ~200m Easily available Distance /Bandwidth
Fiber >>>Gbps Scalable, secure and unlimited capacity Upfront infrastructure required
14
Sprint (US) has reported more than 500K units
Both Sofbank and SFR have reported more than 100K units
Vodafone having reported Femtocells registered users in the “hundreds of thousands” in the UK
AT&T has not reported their numbers directly, analyst estmates also put this at over 500K units
OptSwitch®
- Mobile Ethernet Backhaul Use Cases
1
S-GW
MME
X2
eNB
eNB
S1-u
S1-MME
4G LTE – All IP mult-point Backhaul
LTE proven soluton with strong SLA validaton
Mult-point E-LAN services for user trafc &
inter-eNodeB X2 communicatons
SLA measurements based on HW-OAM (L1/2/3)
Turn-up analysis based on loopbacks and RFC2544/Y.1564
Mult CoS & QoS
ERPS ITU-T G.8032 ring protecton or 1:1 / N+1 and
ELPS G.8031
IPv6 management, packet CoS & forwarding
15
2
Pico/Micro Cell connectvity via Broadband Wholesale
Fiber Networks
Broadband
Network
Cellular
Provider
Enables critcal functon of demarcaton and SLA analysis
over E-Access service via wholesale provider
SLA measurements based on HW-OAM (L1/2/3)
Turn-up analysis based on loopbacks and RFC2544/Y.1564
IPv6 management, packet CoS & forwarding
Wholesale Access
Pro-Vision® Service Delivery and
Provisioning Sofware
LTE Backhaul Soluton for Wholesalers
Real-life Examples – 3G & 4G
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4G LTE Mobile Data Service:
− E-LAN L2 transport service
− Scalable cell site bandwidth >GigE & 10GE
− End-to-end SLA monitoring
− Throughput testng
− Packet-based synchronizaton
4G LTE
Wholesale RAN 3G/4G Data ofoad Service:
− E-Line L2 transport service
− Scalable cell site bandwidth >300Mbps
− End-to-end SLA monitoring
− Throughput testng
− Synchronizaton via legacy network
Wholesale 3G
