NORTEL NETWORKS CONFIDENTIAL PG 0 Wireless Mesh Network The New Era of WLAN Madan Jagernauth Director, Business And Technology Strategy Wireless Mesh Network

NORTEL NETWORKS CONFIDENTIAL PG 1

Wireless Mesh NetworkThe New Era of WLANMadan Jagernauth

Director, Business And Technology Strategy

Wireless Mesh Network

Vendor Soup15 February 2005


Agenda

> Introduction of Wireless Mesh Network concept

> Wireless Mesh Network deployment models

> Introduction to Nortel Networks Wireless Mesh Network solution• Including some technical details (radio technology, community area

networks, mobility, and security)

> Sample of current deployments

> Conclusion of Wireless Mesh Networks Discussion

> A view of WiMAX and how WiMAX and Wireless Mesh Networks could work together


Traditional WLAN

> APs connected in star topology

> Each AP is connected directly to the wired network

> In public deployments, backhaul using leased narrowband (E1/T1, DSL) links

Advantages

> Does not require separate power source

> Inexpensive and simple to deploy

Challenges

> Deployment limited by Ethernet cable length (max 100m)

> In public, capacity limited by narrowband backhaul (E1/T1, DSL)

AP

APAP

AP

AP

AP

Hub

WiredNetwork


Wireless Mesh Network

> Wireless Access Points connected in peer-to-peer topology

> Backhaul using wireless broadband links

> A few Network Access Points connected to broadband network at convenient locations

Advantages

> Backhaul via broadband wireless links• Does not require any cabling to APs• Simplifies network design / deployment,

reduces ongoing OPEX

> Employs wireless peer-to-peer devices for efficient routing, fault recovery

Challenges

> Requires AC power at the AP

BroadbandNetwork


Flexible Deployment Models

Enterprises – Retail/Public Areas• Airports• Convention Centres/Sporting Venues• Hotels• Shopping Malls• Temporary installations for special events

and disaster recovery

Extending the reach of WLAN in areas which do not cost-effectively support a wired LAN

Network Operators• Wireline/Fixed/Cable TV/ISPs/Wireless• Disjoint hotspots link hotspots together,

concentrate wired backhaul• Ubiquitous Coverage “Last mile” – deliver

high speed broadband to homes and offices • Augment existing broadband service or

bypass incumbent carriers

Enterprises

NetworkOperators

Communities/Cities

Wireless Mesh Networks

Cities / Communities• Government/Homeland

Security/Army/Municipalities/Public Works• Private use by its out-of-office employees

• Fire, Police, Ambulance• Public use by its citizens and visitors in

federal or provincial government• Public parks, tourist areas

Enterprises – Private Verticals• Education: Universities or College

Campuses/Schools• Healthcare: Hospitals• Manufacturing: Factory floors, loading

docks, inventory storage buildings


Wireless Mesh NetworkInnovative WLAN Access Solution

> Wireless AP 7220• Indoor/outdoor Access Point• 802.11b/g access link • 802.11a transit link with smart antennas• Self-configuring, self-healing mesh formation• Mobility client proxy for seamless subscriber mobility within

the Community Area Network

> Wireless Gateway 7250

• Enterprise class router• Advertises reachability (within Enterprise/ISP Distribution

Network) for WLAN Community Area Network subscribers• Provides WLAN CAN-specific mobility anchor point • Provides data security for the mesh transit link

> Network Management• APs and Gateway support SNMP network management

interfaces• Currently integrated with Nortel’s Optivity NMS:

• Centralized facility for monitoring and managing network operations, leveraging a field proven end-to-end network mgmt solution

• Discovery & visualization of WG 7250 & AP 7220• Fault management – traps, faults, system log• Real-time performance metrics – utilization, errors, interface

metrics

Enterprise / ISP / MetroDistribution Network

WirelessGateway

CommunityArea Network

Wireless AP 7220

WirelessGateway

Enterprise / ISP Backbone Network

Layer 3Router

Layer 3Router

Border Gateway(NAT, Firewall, etc.)

Internetat large

Optivity NMS

AAA, DHCP,RADIUS

NOSS

Wireless AP 7220


Wireless Access Point 7220

> Performs traffic collection & distribution functions for traffic within the Community Area Network (CAN)

> Incorporates routing and wireless transit functions

> Incorporates security functions for validating connections to other Wireless APs

> Incorporates security functions for controlling access by user devices

> Incorporates low-cost advanced antenna designs for extended reach, simplified deployment, and reliability

> Small size (10” tall x 7.5” diameter) for flexible placement

> Uses 802.11a with proprietary extensions for inter-AP transmissions (Transit Link)

> Uses 802.11b/g for user access (Access Link)

Layer 3Router


Radio Networking Technology

Transit Link (TL) @ 5 GHz• Elevated dual-polar

antennas with switched-beams.

• Uses 802.11a technology.

Existing utility pole or wall offering elevated mounting position

Access Link (AL) @ 2.4 GHz• Elevated, dual-polar, diversity

switched antennas.• Uses 802.11b/g technology.

Wireless AP 7220

MNMN

Coverage of the Access Link (AL) from the Wireless AP

Mobile Client

Access and Transit links separated in space and frequencyAccess and Transit links separated in space and frequency


Wireless Gateway 7250

> Advertises reachability (within Enterprise/ISP Distribution Network) for WLAN CAN subscribers

> Hides WLAN CAN-specific mobility and security functions from the rest of the Enterprise/ISP Distribution and Backbone Networks

> Provides data security for the mesh transit link

> Typically supports about 50 AP 7220

WirelessGateway

7250

WirelessGateway

7250

Layer 3Router Layer 3

Router


Network Operation Support System

> Centralized facility for monitoring and managing network operations and leverages a field proven end-to-end network management solution

• Interface to distributed elements through industry-standard protocols (e.g. DHCP, FTP, SNMP, SNTP, RADIUS)

• Discovery and visualization of Wireless AP 7220 and WG7250

• Fault management• traps, faults, syslog

• Real-time performance metrics• utilization, errors• interface metrics

• Optivity NMS as portal• launch other Nortel element managers

> Leverages off-the-shelf industry standard elements for the DHCP, FTP and RADIUS servers

• Enables customers to future proof their infrastructure investment with integration to their existing back office

> Proper authentication and authorization of users through NOSS ensures no theft of service or revenue losses by the service provider or enterprise

> Minimize configuration required to enable fast, easy and cost-effective deployment and installation

Optivity NMS

NOSS

FTP, RADIUS,DHCP, SNTP


WirelessGateway

7250


Wireless AP7220

WirelessGateway

7250

Enterprise / ISPBackbone Network

Layer 3Switch

Layer 3Switch


Internetat large

Optivity NMS

AAA, DHCP,RADIUS

NOSS


WirelessGateway

7250


Wireless AP7220

WirelessGateway

7250

Enterprise / ISPBackbone Network

Layer 3Router

Layer 3Router


Internetat large

Optivity NMS

FTP, RADIUSDHCP, SNTP

NOSS


Neighbour Auto-Discovery Techniques

Community Area NetworkTopology

Wireless transit link

Arbitrary topology of wireless access and routing points

Wireless access links

NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

AP

AP

MobileNode

AP

AP

AP

AP

AP

APAP

AP

AP

AP

AP

AP

AP

NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

Wired transit link



NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

AP

AP

MobileNode

AP

AP

AP

AP

AP

APAP

AP

AP

AP

AP

AP

AP

NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

Forwarding Path Auto-Discovery

Adaptive Routing Algorithms



NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

AP

AP

MobileNode

AP

AP

AP

AP

AP

APAP

AP

AP

AP

AP

AP

AP

NetworkAccessPoint

NAPRouter

APAP AP

AP

AP

AP

Adaptive Routing Algorithms

Automatic Rerouting

Link or Node Failure


Mobility Network Architecture

Between Internet at Largeand WG 7250• Standard IPv4 addressing

and routing

Between WG 7250 and AP 7220• Wide-Area Mobility

solution based on Mobile IPv4 concepts



Enterprise / ISP Backbone Network

Layer 3Router


Internetat large

NW Mgmt

Wireless Mobile Node(End User)

TransitLink

AccessLink

AAA, DHCP,RADIUS

Wireless Access Point 7220

WirelessGateway 7250

Optivity NetworkManagement

System

Between AP 7220 and Wireless Mobile Node• 802.11 mobility


IPsec Encrypted Tunnel

Authenticated

Authenticated

WPA* EAP Authentication**

NOSSNAP-R

MobileNode

WPA* TKIP, AES Encryption

WPA* - 802.1X/EAPOL RADIUS with EAP Extensions

WPA* - TKIP, AES User Data

* Industry standard WiFi Protected Access, evolving to 802.11i** TLS, TTLS, PEAP

AP 7220

SubscriberAuthentication

SubscriberTraffic

RADIUS Accounting


Security – Subscriber Level

Delivering multiple layers of security enables secure, “anytime, anywhere” access

Trusted NetworkUn-trusted Network


Authenticated for SNMP v3 only (after 1st release)

Authenticated per packet

128 bit Encryption

EAP Authentication

NOSSNAP-R

802.1X/EAPOL RADIUS with EAP Extensions

Mobility Management

Link Signaling

SNMP

AP 7220 AP 7200

IPsec Encrypted Tunnel

APDiscovery andAuthentication

SignalingTraffic

Network MgmtTraffic

SignalingTraffic


Security – Network Level

Delivering multiple layers of security enables secure,

“anytime, anywhere” access

Trusted NetworkUn-trusted Network


>University of Arkansas• 130 Buildings, 345 Acres in Ozark

Mountains• 17K Students, 5K Faculty

>Broadband capability• 2x 50 Mbps Internet WAN links• Gigabit Ethernet campus core network• 10/100 switched Ethernet to most desktops• 10/100 switched "per pillow" residence hall network• Wireless "Hotspots"; general use, public safety,

parking tickets• Wireless bridging for satellite offices

WMN Solution addresses key concerns such as:• scalability• reaching outdoor areas where wired infrastructure

would not be feasible• trees and buildings creating radio "shadow" areas• ad hoc 802.11b/g SOHO access points - channel

interference• bandwidth saturation• network management

>Why Outdoors?• Attractive outdoor seating areas• Relatively mild weather• Outdoor areas conducive to gatherings (ARKU Mall,

Fulbright Peace Fountain, Old Main lawn)• Supplement Public Safety, Facilities Management work

orders, parking ticket, book store end of term book buy-back

• Future for Wi-Fi IP Phones

> Press Release http://www.nortelnetworks.com/corporate/news/newsreleases/2004d/10_19_04_univ_of_arkansas.html

Live WMN Deployments – University of Arkansas


Edith Cowan UniversityFirst Wireless Mesh Network in Australia

> Australia's first wireless mesh network

• Using wireless mesh and local area network (LAN) solutions from Nortel

• Plans to deploy before the end of 2004

> Edith Cowan University

• Almost 23,000 students including 3,000 international enrollments

• Second-largest university in Western Australia.

• Metropolitan campuses in Churchlands, Mount Lawley and Joondalup and a regional campus in Bunbury

> Delivering innovative Broadband capability

• Providing staff and students seamless wireless access to University applications and resources

• Extended reach: Provide coverage both inside and outside the campus buildings,

• Scalability: Nortel’s Wireless Mesh Network solution enables Edith Cowan University to meet current and future bandwidth demands

• Flexibility: Nortel’s Wireless Mesh Networks solution enables Edith Cowan to accommodate future technology such as converged voice, video and data communications. • Also, due to the University's geographical spread, it had to be hardy enough to

service both metropolitan and rural environments.

> Future applications• Plans to trial Nortel’s Multimedia Communications

Server (MCS) 5100 in the next 12 months with a view to enabling converged multimedia (voice, video and data streaming) services over the wireless mesh network.

> Press Release http://www.nortelnetworks.com/corporate/news/newsreleases/2004d/10_19_04_univ_of_arkansas.html

Significant potential cost savings

“We've determined that up to 70 per cent of mobile calls are from a campus base station to a campus phone," said Jeff Murray, IT manager, Edith Cowan University. "Future capabilities of the wireless mesh network can make this service available to all students and staff and can save AU$300,000, which means the new network will basically pay for itself."


Public WMN Trial Site: National Taiwan University and its Surrounding Business Area

CAN3_AP2

CAN3_AP1

CAN3_NAP

CAN1_NAP

CAN2_AP1

CAN1_AP1

CAN1_AP2

CAN3_AP3

Innovative Wireless Mesh Network Solution for Public WLAN: Providing campus-wide indoor and outdoor coverage to NTU’s professors, students, and staff as benchmark, leading-edge wireless mesh deployment in Taiwan

Partner with Taiwan local companies for network build-out: Using range extender solutions to provide WMN relay to enhance outdoor to indoor coverage

Nortel Networks first Wireless Mesh Network deployment in Asia

Includes a comprehensive network solution: Up to 17 Wireless AP 7220s, 1 Passport 1424 (NAP-R), 1 Optivity NMS Software, Wireless Gateway 7250, 2220/2221 WLAN Mobile Adapters

Support for multimedia applications (web browsing, video streaming, e-mail)

Demo of advanced applications (Wi-Fi voice over IP, seamless hand-over while driving at speeds of 50 kilometers per hour, surveillance video using web cam)*

Press Release: http://www.nortelnetworks.com/corporate/news/newsreleases/2004c/08_05_04_national_taiwan_university.html

*Initial Testing done on pre-GA Release 1.0 software load


Documents

NORTEL NETWORKS CONFIDENTIAL PG 0 Wireless Mesh Network The New Era of WLAN Madan Jagernauth Director, Business And Technology Strategy Wireless Mesh Network