Transcript Introduction to the MEF

Carrier Ethernet In
Mobile Backhaul
Moderator:
Ran Avital - Ceragon Networks
Panelists:
Bill Balmer - Accedian Networks
Ralph Santitoro - Turin Networks
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Ran Avital
MEF Market Research Co-Chair
Director of Strategic
and Product Marketing
Ceragon Networks
[email protected]
Bill Balmer
VP of Business Development
Accedian Networks
[email protected]
Ralph Santitoro
Chair, MEF Web Marketing Committee
Director of Carrier Ethernet Solutions
Turin Networks
[email protected]
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Carrier Ethernet in
Mobile Backhaul
Ran Avital
Director of Strategic
and Product Marketing
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Towards Carrier Ethernet RAN Backhaul
Decouple the
capacity growth
from the OPEX
and CAPEX in the
transport network
Heavy reading, May 2007
Cellular Base Station
Central Office
Ethernet Backhaul
Ethernet
Switch
Ethernet
Carrier Ethernet Services emerges as the natural choice.
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Ethernet Mobile Backhaul is Forecast to Soar
Mobile operators shelled out $19.5B
in mobile backhaul service charges in
2006
Infonetics Research, April 2007
The cost per mobile backhaul
connection for leased lines PDH and
ATM over PDH is about two and a half
times that of new wireline
connections (Ethernet, DSL, cable,
PON), now and in 2010
Ethernet makes up just 1% of total
mobile backhaul equipment revenue
in 2006, but is forecast to soar to $2.5
billion by 2010, at which time it will
represent 41% of the market
The MEF Work
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Ethernet services for mobile backhaul
Business Challenges
Deployment Challenges
• Cost and revenue decoupling
• Define Ethernet services
• Multiple technologies GSM,
WCDMA, CDMA2000, and
WiMAX 802.16e
• Base stations collocation
• Leverage install base
• Increase Bandwidth
• Increase Reliability
• Adapt to multiple underlying
available media: Fiber, Copper
and Microwave
• Adapt to multiple migration
requirements
• Service assurance and manage
SLAs in the mobile backhaul
networks
MEF will deliver an
Implementation Agreement (IA) to accelerate the
adoption of Ethernet services for Mobile Backhaul
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MEF Mobile Backhaul Work
Work Groups, Scope and Timeline
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Technical workgroup scope and deliveries
Scope of Phase 1
Recommendations
• Single MEN
• Define Ethernet services
• RAN backhaul part of mobile
backhaul
• GSM, WCDMA, CDMA2000,
and WiMAX 802.16e
• ‘Transparent’ or out-of-MEN
sync methods
• 4 main use cases
• Main use cases
• Ethernet Service Types
• CoS
• Performance
• Synchronization
• Ethernet OAM
• Protection and fault recovery
• UNI Type definition
Project deliverable:
Service Implementation Agreement (IA)
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Technical Project Timeline
• 07 Q1 – Present project proposal to
Technical Committee (TC)
• 07 Q2 – Use case specifications for
Implementation agreement (IA)
• 07 Q3 – Initial draft of implementation
agreement
– Industry Survey Launch
Now
• 07 Q4 – Approved draft, first straw ballot on
implementation agreement
• 08 Q4 – Letter ballot of IA (might be earlier)
Process is on track.
Interop lab demos based on IA draft are expected in 2008
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New Terms for Mobile Backhaul Services
•
•
•
•
•
RAN CE – generic term for mobile radio access network node or site; may depict
both RAN NC & RAN BS nodes
RAN NC – a RAN network controller or network controller site
RAN BS – a RAN base station or base station site
RAN I/F – a non-Ethernet based interface between a RAN CE and GIWF
GIWF – Generic Inter-working Function; enables a RAN CE with a RAN I/F to
connect to a UNI
RAN CE
RAN BS
UNI RAN NC
UNI
RAN Backhaul Network
(MEN)
RAN NC
RAN BS
GIWF
RAN I/F
GIWF
UNI
UNI
RAN I/F
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Mobile Backhaul Use Case Model
1a
2a
1b
2b
Use Case 1: Legacy transmission
support
Use Case 2: Use of MEF UNI/EVC
attributes
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Carrier Ethernet in
Mobile Backhaul
Bill Balmer
VP of Business Development
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WiMAX Backhaul: from BST to MSC
WiMAX
WiMAX
BST
BST
WiMAX
HUB
RPTR
BST
MSC
Outsourced Backhaul
BST: Base Station, RPTR: Repeater Site, HUB: Hub Site, MSC: Mobile Switching Center
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Initial Rollouts of WiMAX
• Use of outsourcing model to increase coverage of pilot
trials
• Allows multiple simultaneous market launches
• Mostly using a hybrid wireless+fiber approach
• Usually involves two or more carriers
• Typically involves numerous technologies from BST to
MSC (TDM, ATM, MPLS/Pseudowires) and will continue
so for a long while.
• Always involves a multitude of different vendors.
• With WiMAX backhaul, only one thing is common from
BST to MSC:
it’s IP packets on an Ethernet connector at both ends.
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Why are SLAs important for WiMAX Backhaul?
• Since VoIP is a main driver for Mobile WiMAX, SLAs are paramount
when outsourcing WiMAX backhaul.
• End-users have come to tolerate a lesser voice quality on Mobile
phones vs traditional Land lines.
• End-users have come to tolerate a lesser voice quality on VoIP vs
traditional analog POTS.
• End-users will not tolerate an excessive combined voice
degradation due to doing VoIP over Mobile WiMAX.
• Since the outsourced backhaul provider is usually a Layer 2
service provider, he shall then use Layer 2 SLA parameters (i.e.
Ethernet SLA parameters) applied 24/7 on live traffic.
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Emerging Ethernet Standards allow WiMAX backhaul SLAs
WiMAX
HUB
RPTR
BST
MSC
Outsourced Backhaul
MEF &
ITU Y.1731
IEEE 802.1ag,
MEF & ITU Y.1731
IEEE 802.3ah
Service Layer OAM (UNI to UNI)
Connectivity Layer OAM
Access Link OAM
Access Link OAM
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Carrier Ethernet in
Mobile Backhaul
Ralph Santitoro
Director of Carrier Ethernet Solutions
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What is Ethernet over PDH (EoPDH)?
• PDH (Plesiochronous Digital Hierarchy)
– Term to collectively refer to T1/E1 and T3/E3 circuits
• EoPDH enables Ethernet-based service delivery
over copper/PDH access networks
– Both E-Line (site-to-site) and E-LAN (multi-site) services
– Ethernet Access to IP services (Internet Access, IP VPNs, VoIP)
• Bandwidth Options (technology dependent)
–
–
–
–
Up to 12Mbps (8 bonded T1s) or 24Mbps (16 bonded T1s)
Up to 16Mbps (8 bonded E1s) or 32Mbps (16 bonded E1s)
Up to 32Mbps (1 E3)
Up to 45Mbps (1 T3)
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What technologies are used do deliver EoPDH ?
• Two ‘competing’ technologies
– MLPPP/BCP-based EoPDH (RFC1990 / RFC3518)
• for encapsulation, bonding and bridging
– GFP/VCAT/LCAS-based EoPDH (G.8040)
• GFP (G.7040) for encapsulation,
• VCAT (G.7041) and LCAS (G.7042) for bonding
• CPE device support
– MLPPP/BCP-based EoPDH supported on most CPE
WAN routers and IADs
– GFP-based EoPDH supported on new types of CPE
devices
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How does it work?
Ethernet
Frame
Cell Site
RAN
•
•
Mobile
Switching
Center or
Switching
Hub
EoPDH
Aggregator
PTT
Internet
IP
IP
ETH
IP
ETH
IP
ETH
PPP
or GFP
PPP
or GFP
ETH
Switching
Hub
Into PPP or GFP for transport over PDH network
Switching
Hub
E1s extracted from channelized STMn circuits
PPP or GFP sessions terminated and Ethernet Frames are reconstructed
Each cell site RAN Ethernet frames mapped to S-VLANs (EVC)
–
•
Ethernet Service Frame
in S-VLAN / EVC
PTT multiplexes E1s into channelized STMn circuits or Microwave
Backhaul provider transports E1 data
E1s or channelized STMn circuits terminated on EoPDH edge aggregation device
–
–
•
EoPDH
CLE
E1 or
Channelized
STMn
Ethernet Frames enter EoPDH CLE device and encapsulated
–
•
Bonded
E1s
Microwave
Backhaul
Provider
To preserve each cell site RAN’s C-VLAN IDs and 802.1p CoS markings
S-VLAN-tagged Ethernet frame (EVC) to Mobile Switching Center or Switching Hub
–
MSC provides connection to Internet. Switching Hub aggregates Ethernet traffic
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Why EoPDH for Mobile Backhaul?
• Enables mobile operators to backhaul and aggregate data
services over a Carrier Ethernet infrastructure
– Natural evolution of current SDH-based aggregation network to support
high growth IP-centric applications
• Internet access, VoIP and IP VPNs over WiMAX or GSM RANs
– Can terminate PDH circuits at hub sites enabling more efficient (lower
OpEx) transport of IP services
• Enables subscriber data service aggregation and oversubscription
over Carrier Ethernet transport network between switching hubs
Switching
Hub
Switching
Hub
Carrier Ethernet
Transport Network
Mobile
Switching
Center
Internet
Switching
Hub
Microwave
Backhaul
E1
Backhaul
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Carrier Ethernet in Mobile Backhaul - Q&A
Ran Avital
MEF Market Research Co-Chair
Director of Strategic
and Product Marketing
Ceragon Networks
[email protected]
Bill Balmer
VP of Business Development
Accedian Networks
[email protected]
Ralph Santitoro
Chair, MEF Web Marketing Committee
Director of Carrier Ethernet Solutions
Turin Networks
[email protected]
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