equipping rural broadband networks oecd workshop
TRANSCRIPT
PG 1NORTEL NETWORKS CONFIDENTIAL PG 1
Peter ZwinkelsBusiness Development Public WLAN solutionsPorto, October 2004
Equipping Rural Broadband NetworksOECD Workshop
Nortel Networks Confidential Page 2
Data Access Landscape
Speed
Fix
edN
om
adic
Mo
bile
100 kbps 1 Mbps
Cable Modem
GPRS,Mobile Circuit Switch
1xRTT,EDGE
UMTS1xEV-DO
802.11 a/b/g
10 Mbps 100 Mbps
802.16a/d
802.16e802.20
Wireless Data Access technologies enabling Rural Broadband Networks
DSL
Nortel Networks Confidential Page 3
Benefits WLAN
User perspective
• Emergence of WiFi enabled devices
– Computers with WiFi cards
– Labtops and PDA’s with inbuild WiFi antenna
– Dual mode phones/Smart phones
• Increase of WLAN deployments
– At home
– In the office
– Hotspots
Service provider perspective
• WLAN become widely available inexpensive and ubiquitous
– “Billion” dollar business today
• Over 500 MHz of spectrum available
– No billion dollar license fees
• Standard driven technology
– IEEE 802.11a/b/g (etc.) standard is mature (10 years in development)
– 802.11 standards community is as big as cellular standards More spectrum available than all cellular bands
WLAN is becoming THE technology for last mile wireless data access
Nortel Networks Confidential Page 4
Wireless Data options in rural area’s
• Isolated hotspots– Requires wired backhaul to every hotspot– Primarily indoor coverage
• Extending Coverage with Outdoor APs– Wiring and OPEX costly– Does not address handover and mobility
• WiMAX (802.16)– High power and tower requirements– Initially to address Hotspot backhaul (BWA)– Cheap CPE/Mobile Devices not yet here
• Wireless Mesh Technology– New entrant in the marketplace– Currently not tracked by analysts yet– Utilizes standard 802.11 RF for traffic backhaul– Can be complimentary to future 802.16 WiMAX
Nortel Networks Confidential Page 5
Wireless Mesh Technology Choices
• Single RF Systems– Mobile users and Access Points
share the same radio frequency between access and backhaul
– Inexpensive, low bandwidth, small scale, high potential of interference
• Dual RF Static Systems– Radio access frequency and
backhaul link frequency are different– Better performance and scale, less
interference– Statically configure LOS on backhaul,
single point of failure
• Multi-RF Intelligent Systems– Multiple focused RF modules for
backhaul links– Single RF access link for users– Access Point is a router that can re-
route around failures– Greater capacity, scalability
Nortel Networks Confidential Page 6
Wireless Mesh Network Solution
• Reduces installation and commissioning costs
– Self-configuring, self-healing– No RF engineering required– Outdoor packaging and low power
consumption permits installation almost anywhere
• Reduces operating expenses– Eliminates requirements for wired backhaul
connection to every Access Point– Basic router connection to backbone
network, Packet Gateway manages mobility, roaming, and security
• Provides differentiated WLAN access in large areas
– Mobility within the Mesh– Broadband access and transit remove
network bottlenecks
Enterprise / ISP / MetroDistribution Network
WirelessGateway
7250
CommunityArea Network
Alpha
Wireless AP7220
Enterprise / ISPBackbone Network
L3Router
Border Gateway(NAT, Firewall, etc.)
Internetat large
Optivity NMS
AAA, DHCP,RADIUS
NOSS
Network Elements of the WMNNetwork Elements of the WMN•• Wireless Gateway 7250Wireless Gateway 7250•• Access Point 7220Access Point 7220•• Optivity Network Management SystemOptivity Network Management System
CommunityArea Network
Beta
Nortel Networks Confidential Page 7
How can “The Mesh” be accessed ?
WMN 7220Access Point
Mobile Node (MN)
Transit Link (TL) @ 5 GHz• Elevated dual-polar antennas with
switched-beams and adaptive CCIC*.• Uses 802.11a technology• External antennas for longer reach
Access Link (AL) @ 2.4 GHz• Elevated, dual-polar, diversity
switched antennas and adaptive CCIC*.
• Uses 802.11b/g technology
RF – Ethernet Module
SOHO/SME
Power over Ethernet Injector
LANRouter
802.11 b/g signalto WMN AP
Flat Panel Antenna
120 AC Power
RF – Ethernet Module
HOT SPOT
WiFi Coverage
Flat Panel Antenna
802.11 b/g signalto WMN AP
802.11 b/g signalto WMN AP
Nortel Networks Confidential Page 8
5 Ghz Spectrum situation
• Several bands in the 5 Ghz spectrum have been allocated for WLAN usage• Wireless Mesh Network solution operates in unlicensed, but regulated spectrum• It is down to each country to decide:
– To open for WLAN or not• Often already allocated to Army Forces
– Licensing Policy
5.15 GHz 5.35 GHz5.25 GHz 5.47 GHz 5.725 GHz 5.85 GHz4.9 GHz
4ch 4ch 4ch 6ch13ch
5.0GHz
3ch
USA, JapanIn/Outdoor(Licensed)
Japan In/Outdoor(Licensed, tentative
use by 2007)
USA In/Outdoor
5.03 -5.091 GHz
Recommended spectrum for US
Recommended spectrum for Europe
(also US soon)
USA, Europe, JapanIndoor only
USA In/Outdoor(required DFS & TPC soon)
Europe Indoor only
Recommended spectrum for US
Under discussion to be permitted for WLAN in Japan by Ministry o f Public Management(that is not permitted in Japan now)
USA (soon ), Europe, In/outdoor
(required DFS & TPC )
5.15 GHz 5.35 GHz5.25 GHz 5.47 GHz 5.725 GHz 5.85 GHz4.9 GHz
4ch 4ch 4ch 6ch13ch
5.0GHz
3ch
USA, JapanIn/Outdoor(Licensed)
Japan In/Outdoor(Licensed, tentative
use by 2007)
USA In/Outdoor
5.03 -5.091 GHz
Recommended spectrum for US
Recommended spectrum for Europe
(also US soon)
USA, Europe, JapanIndoor only
USA In/Outdoor(required DFS & TPC soon)
Europe Indoor only
Recommended spectrum for US
Under discussion to be permitted for WLAN in Japan by Ministry o f Public Management(that is not permitted in Japan now)
USA (soon ), Europe, In/outdoor
(required DFS & TPC )
– Usage conditions:• Indoor/Outdoor• Transmission Power/Range • Interference Controle Mechanisms
- Dynamic Frequency Selection (DFS) - Transmit Power Controle (TPC)
• Type Approval
Nortel Networks Confidential Page 9
Introduction of WiMAX
• Business Users– WiMAX estimated at 10% of T1 cost for
equivalent capacity
– E1/T1+ Large enterprise– Fractional E1/T1 small business
• Broadband residential– Making the broadband home revolution
happen
– Initially only outdoor access
• Backhaul for hotspots/hotzones– WLAN increase appetite for broadband
access
• Unwired regions– China Unicom already rolling out WiMAX
base stationsResidential
SME
Hotspots
Base Station
Subscriber Stations
802.16802.16
Non Line of SightNon Line of SightPoint to MultiPoint to Multi--pointpoint
Nortel Networks Confidential Page 10
Enterprise / ISP / MetroDistribution Network
WirelessGateway
7250
CommunityArea Network
Alpha
Wireless AP7220
Enterprise / ISPBackbone Network
L3Router
Border Gateway(NAT, Firewall, etc.)
Internetat large
Optivity NMS
AAA, DHCP,RADIUS
NOSS
CommunityArea Network
Beta
EXPLORATORYConsiderations• Spectrum• Range• Cost
AP72zz
AP72zz
CommunityArea Network
Gamma
AP72zzAP72zzAP72zz
Wireless Mesh Network with WiMAX backhaul solution
WIMAXWirelessBackhaul
Nortel Networks Confidential Page 11
Summary
• Wireless Networking technology is best alternative to provide coverage in rural and remote area’s
– Rolling out wired networks costly and timely
• WLAN is becoming the last mile wireless Data Access Technology
– Huge demand in enterprise and consumer market have made WiFi radio technology very cheap
– Availability of WiFi enabled devices is surging
• Wireless Mesh Hotzone solution offers a flexible and cost-effective alternative to deploying isolated hotspots
– Only (solar) power source required at Access Point location
• Combination of WIMAX and WLAN/WMN access technologies is promising option for equipping Rural Broadband Networks
PG 12NORTEL NETWORKS CONFIDENTIAL PG 12
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