Carrier Ethernet In Mobile Backhaul

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Carrier Ethernet InMobile 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 rana_at_ceragon.com
Bill Balmer VP of Business Development Accedian
Networks bbalmer_at_accedian.com
Ralph Santitoro Chair, MEF Web Marketing
Committee Director of Carrier Ethernet
Solutions Turin Networks Ralph_at_Marcom-Services.net
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Carrier Ethernet inMobile 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
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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
Under discussion

• 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
• 07 Q4 Approved draft, first straw ballot on
  implementation agreement
• 08 Q4 Letter ballot of IA (might be earlier)

Now
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
RAN NC
UNI
UNI
RAN Backhaul Network (MEN)
RAN NC
RAN BS
GIWF
GIWF
UNI
RAN I/F
UNI
RAN I/F
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Mobile Backhaul Use Case Model
1a
2a
2b
1b
Use Case 1 Legacy transmission support Use Case
2 Use of MEF UNI/EVC attributes
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Carrier Ethernet inMobile 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 wirelessfiber 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
• its 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
Service Layer OAM (UNI to UNI)
Connectivity Layer OAM
IEEE 802.1ag, MEF ITU Y.1731
Access Link OAM
Access Link OAM
IEEE 802.3ah
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Carrier Ethernet inMobile 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?
E1 or Channelized STMn
Ethernet Service Frame in S-VLAN / EVC
Internet
Ethernet Frame
Microwave Backhaul Provider
Bonded E1s
EoPDH Aggregator
Mobile Switching Center or Switching Hub
EoPDH CLE
Cell Site RAN
PTT
IP
IP
ETH
ETH

• Ethernet Frames enter EoPDH CLE device and
  encapsulated
• Into PPP or GFP for transport over PDH network
• 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
• 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)
• To preserve each cell site RANs 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

Mobile Switching Center
Carrier Ethernet Transport Network
Internet
Microwave Backhaul
E1 Backhaul
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Carrier Ethernet in Mobile Backhaul - QA
Ran Avital MEF Market Research Co-Chair Director
of Strategic and Product Marketing Ceragon
Networks rana_at_ceragon.com
Bill Balmer VP of Business Development Accedian
Networks bbalmer_at_accedian.com
Ralph Santitoro Chair, MEF Web Marketing
Committee Director of Carrier Ethernet
Solutions Turin Networks Ralph_at_Marcom-Services.net
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