Circuits to Packets - policy and regulation for the IP transition
MICROWAVE TECHNOLOGIES FOR THE MOBILE TRANSITION TO IP
Transcript of MICROWAVE TECHNOLOGIES FOR THE MOBILE TRANSITION TO IP
PETER CROY, SENIOR NETWORK ARCHITECT
AVIAT NETWORKS
MICROWAVE TECHNOLOGIES
FOR THE MOBILE TRANSITION TO IP
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Agenda
• Introducing Aviat Networks
• Wireless Broadband Today
• Traffic Impact on Backhaul Networks
• Network Architecture Evolution
• Microwave Radio Technologies
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About Aviat Networks
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$479millionFY10 Revenue
500,000systems installed
around the world
185Patents
1Largest
Independent
Provider of
Wireless
Transmission
Solutions
Solid Balance
Sheet &
Financial
Liquidity
50years of
providing wireless
communications
260Mobile networks
served around
the world
4thLargest Provider of
Next Generation
wireless
solutions
6thLargest Provider
of wireless
solutions globally
Source: Company data and Skylight Research, Worldwide Microwave Radio Quarterly Market Share Report, Calendar Year 4Q 2009 & Full Year 2009
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Global Company Footprint
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Corporate HQ
and R&D Center
California, US
International
Headquarters
Singapore
European
R&D Center
Ljubljana, SI
APAC
R&D Center
Wellington, NZ
Expanding the Scope of Transmission Applications
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Mobile
Networks Digital
Oilfield
Smart
Grid
Public
Safety
Enterprise
Smart
ClassroomHealthcare
First/Last Mile
Backhaul
Metro/
Aggregation
Core
Transport
Rural
Broadband
WiMAX LICENSEDLICENSE
EXEMPTE-BAND
TYPICAL
APPLICATIONS
The Aviat Advantage
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• The assurance of working with the largest independent Specialist
focused on wireless transport systems
• Significant presence and support across the world
• Broad, global customer base
• Early Leader in Wireless IP transmission
• All the global resources and stability that smaller specialists cannot match,
yet in a corporate size that you can easily work with
• The experience, foresight and technology to anticipate market needs and
deliver innovative and individualized solutions
WIRELESS BROADBAND TODAY
Will there ever be a limit to our demand for capacity?
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Growth of Wireless Data Downloads
• VoIP & IM have significant growth rate in all regions
• HTTP streaming/video will outgrow all other traffic (e.g. YouTube)
Source: Allot Mobile Trends Global Mobile Broadband Traffic Report, H2/2009
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USER TRAFFIC IMPACT
ON BACKHAUL NETWORKS
Backhaul for Wireless Broadband
Is backhaul network evolution only about more capacity?- Traffic management and routing
- QoS handling
- Service monitoring & Fault finding/fixing
Comparing wireless broadband technologies- HSPA and WiMAX have similar backhaul network requirements
- LTE R8 demands more capacity (2-5x) and quality (30ms delay) from backhaul
- What is hosted on a single backhaul network – e.g. wholesale provider?
Further considerations for backhaul networks- More new sites required as user numbers and data volume grows
- Need to simplify trouble-shooting and network management
- Rising regulatory demands (e.g. site sharing, scarcity of frequency bands)
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Wireless Broadband Backhaul Network Requirements
3G HSPA (R6) WiMAX LTE (R8)
Backhaul transport IP/Ethernet (or ATM) IP/Ethernet IP/Ethernet
Site capacity 10 to 30+ Mbit/s 10 to 30+ Mbit/s 30 to 100+ Mbit/s
Synchronization TDM (from E1/DS1) GPS via Packet or GPS
Packet Quality ATM or Eth CoS IP QoS IP QoS & Eth CoS
Max. RAN packet delay (round trip)
N/A N/A 30 ms
Inter-cell site IP connectivity
N/A R8 interface X2 interface
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CORE
Core Networks
WiMAX
R99/R4
LTE EPC
www
PSTN
Backhaul Network: User Traffic Impacts
RADIO ACCESS NETWORK
IP/MPLS
Copper Lines
RNC
S-GW
ASN
IP/Ethernet
BACKHAUL
HSPA
WiMAX
LTE
Microwave
Fiber
DEVICES
BSC
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User Download
Traffic Volume
Main Traffic
Congestion Points
User Upload Traffic Volume
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NETWORK ARCHITECTURE EVOLUTION
LTE RAN Architecture (3GPP R8)
• LTE radio base stations (eNB) connect to
multiple core nodes via the S1 interface
– User plane to S-GW (S1-U) and
– Control plane to MME (S1-MME)
• eNB connects directly to EPC core nodes
– HSPA needs a radio node controller
• New: Direct user session handover
interface specified between eNBs (X2)
• eNB learns neighbours via Automatic
Neighbor Relations (ANR) protocol
• Up to 20 neighbours connected via X2
• Backhaul must ensure IP connectivity
between eNB neighbours for X2
IP/Ethernet
backhaul only!
Evolved Packet
Core (EPC)
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WiMAX RAN Architecture (WiMAX Forum)
• R6 interface backhauls traffic from base stations to the ASN gateway
• R3 interface backhauls traffic from ASN gateway to core network (CSN)
• CSN hosts core services and connectivity to Internet and other
providers
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Mobile
Station
Base
Station
Base
Station
ASN
Gateway
AAA
Billing
Gateway
to
other CSNR5
CSN - Connectivity
Service Network
R1R
6
R
6
R8
R3IP/Ethernet
R2
IP/Ethernet
R4
Other
ASN
ASN – Access
service network
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CORE
Core Networks
WiMAX
R99/R4
LTE EPC
www
PSTN
Backhaul Network: Transport Options
RADIO ACCESS NETWORK
IP/MPLS
Copper Lines
RNC
S-GW
ASN
IP/Ethernet
BACKHAUL
HSPA
WiMAX
LTE
Microwave
Fiber
DEVICES
BSC
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Can not meet backhaul
capacity demands✗
✓
✓Meets backhaul
capacity demands
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Wireless Broadband Backhaul Networks
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ASN WiMAX
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MICROWAVE RADIO TECHNOLOGIES
Modern Microwave Transport Systems
Nodal concept for multiple links per site
Split-mount Indoor & Outdoor unit or
all-indoor with antenna waveguide
• Outdoor RFU for 6 to 38 GHz links
• Indoor RFU for 6 to 11 GHz trunks
Protected & scalable transmission
• 1+0, 1+1, 2+0, dual-polarization, LAG, …
• Up to 1Gbit/s (depending on RF channel)
• Modulation up to 256QAM; 512/1024QAM coming
• Typical link availability of up to 99.999%
Link distances from <1km up to >50km
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Millimeter Wave Band Systems
• Radio systems operating above 40 GHz
- Radio & antenna unit are ‘All-outdoor’
• 70/80 GHz band is ‘lightly’ licensed
- Better rain attenuation
- 5 GHz of bandwidth available
• Very good capacity scalability
- ‘Fiber performance’ for > 1Gbit/s
- Large bandwidth allows dense networks
• Link availability is distance limited
- 99.99x% for up to 1.5km; 3km possible
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Microwave is Ready for Backhaul Network Expansion
Requirements Fiber Microwave
LTE site capacity (3 sectors) 30 – 100+ Mbit/s 30 – 100+ Mbit/s
Link capacity out of metro aggregation sites
>1000 Mbit/s <2000 Mbit/s
Distance between sites Up to 30 km Up to 30 km
Time to establish link months to year days to weeks
Link availability up to 99.999% up to 99.999%
Cost factor: Capex / Opex (Very) High / Medium Medium / Low
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Scaling Mobile Networks with Microwave Radios
• Operators are looking for options to scale their backhaul networks:
- Business model: Backhaul outsourcing to wholesale network provider
- Transport Media: Fiber, Microwave, (copper)
- Traffic payload: Mix of TDM+Ethernet for legacy, IP/Ethernet for broadband
- Clock synchronization: GPS, TDM, SyncEthernet and/or packet-based 1588v2
• Microwave technology is evolving to meet all networking needs as an
integrated access gateway and multi-traffic aggregation node
• More capacity through coding and modulation gains, new frequencies
• Full suite of Carrier Ethernet features: VLAN, OAM, link aggregation, …
• Perfect complement to Fiber plant rollout projects (shorten lead times)
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