Bell Labs IOTA Technology Assets: Mobility Client Software ... · PortableHotSpot: quickly provide...

Bell Labs IOTA Technology Assets:802.11 Access GatewayMobility Client SoftwareMobileHotSpot Gateway

Scott MillerDirector, High Speed Mobile Data Research

Networking Research LaboratoryBell Laboratories, Lucent Technologies

[email protected]

Lucent Technologies - Proprietary

Motivation Slides


3G (cdma2000 & UMTS) 802.11b Data rates 144 Kbps – 2Mbps 11 Mbps Spectrum Licensed (1.8-2.2 GHz) Unlicensed (2.4 GHz) Radio Range Few miles <300 feet Mobility High-speed Walking speed Security Established, well defined Problem, standard being defined Terminals Emerging now: PC Cards, PDA Low cost, laptop built-in

• Technology differences make 802.11 and 3G serve different roles – 802.11 used for indoor data and hotspot coverage– 3G used for voice and ubiquitous data coverage

• End terminals can support both technologies• Offload data traffic onto 802.11 in hotspot areas leaving more voice capacity

Public 802.11 and 3G can coexist to offer subscribers bettercoverage and service

802.11 & 3G Are Complementary Technologies


Complete Service Picture

Wireless CarrierNetwork

2.5/3GAccessStarbucks

“Store-front”

Airport/Enterprise Airport/

Enterprise

TerminalPossibilities

Applications/Content

Authentication

Accounting

Mobility/Roaming

Agreements

CorporateNetwork

Applications/Content

Accounting/Billing

AuthenticationVPN

2.5/3GAccess

HandoffPossibilities

IntertechInternetwk

Handoff

IntratechIntranetwk

Handoff

IntratechIntranetwk

HandoffIntratech

InternetwkHandoff

IntratechInternetwk

Handoff

IntratechInternetwk

Handoff

RoamingBroker

Seamless Mobility/Roamingfor Subscriber/

Negotiated Rates with Partners

One Bill fromWireless Carrier/

Bundled Data Package

Uninterrupted Applications:Streaming, Email, Corporate VPN, Web

Dual Interface Built-in 802.11 Combined Air Card

SubscriberService

WirelessAccess

NetworkSupport

802.11802.11

Built-in 802.112.5G or 3G data card

Internet


Wireless Carrier Benefits of Combined Offering

• “Owning” the subscriber through bundled 802.11 and 2.5G/3G data offering– offer ubiquitous wireless data coverage and seamless roaming without

dropped data connections– example: $X/month package for 3G data access as well as 802.11 access on

all roaming partner networks– stimulate growth of 3G wireless data usage with combined offering– single point of administration for subscribers

• Carrier differentiation– better data coverage through revenue sharing arrangements with 802.11

partner ISPs– better rates for subscriber through carrier negotiated rates on partner

networks• Better service in congested hotspot and indoor areas

– offer higher speed data access through 802.11– better availability of 3G for voice services by offloading data traffic to 802.11

networks


Bell Labs Technology Assets• Technology to support two distinct methods of embracing 802.11 as complimentary

to 3G wireless – these are:802.11/3G Service Integration– Challenge is to define end-to-end networking and service architecture for user

authentication, billing, accounting, service profile, security, roaming, dual-network terminal support, and seamless inter-technology handoffs

Mobile HotSpot/Portable HotSpot– Enable subscribers to access the Internet by using 802.11 bridged to a 3G high-speed

wireless data backhaul (e.g. EV-DO) in buses, trains, hotspots, and places where it is not feasible to have a wired backhaul or for quick temporary network setup

• Advanced prototype versions of the following have been built:802.11 Access Gateway– provides interoperability with 3G network– provides security, mobility, accounting, and IP layer features for public 802.11 access– Software-only solution on standard Linux platformMobility Client Software– Windows client software to improve end-user experience, manage multiple physical

interfaces (802.11, 3G, ethernet), and provide seamless mobility across networksMobileHotSpot Gateway– Combines 802.11 access point, EV-DO 3G wireless backhaul, and public access

gateway networking functionality into a single box allowing for mobile/portable hotspot


High-Level Architectures for:802.11/3G Service Integration

Mobile/Portable HotSpots


HomeAAA

MobilityAgent

Hot-spot 802.11(802.11 WISP)

Access Router

802.11Access Points

802.11 Gateway

“Home” network(e.g. Verizon)

Leased line(T1, DSL, cable…)

BSBS

3G WirelessAccess

(e.g. Verizon) BSC

PCF or SGSN Local AAA

PDSN or GGSN/FA

Internet

Dual-mode terminal w/Mobile-IP client

software

802.11 Integration Architecture with 3G WirelessGoal: Seamless roaming/uninterrupted access regardless of air interface

BillingServers

One bill for all wireless services Reuse 3G backend infrastructure for 802.11

Networks deployed andengineered independently,

Roaming partnerships

2 Missing Pieces:802.11 Gateway &

Client Software

Common solution for CDMA2000& UMTS although easier to

interoperate with CDMA2000

Simple-IP &Mobile-IP modes

supported


EV-DO WirelessAccess Network

Internet

Mobile/Portable HotSpot Basic ConceptGoal: Leverage 802.11 for access to 3G data

MobileHotSpot GatewayCombines 802.11 AP,EV-DO Backhaul, and Public Access Gateway

Subscriberw/ 802.11

EV-DOWirelessBackhaul

Cable/DSLAccess Network

Internet

At Home

Subscriberw/ 802.11

Cable/DSLAccess

EnterpriseIntranet

Internet

Subscriberw/ 802.11

Ethernet

Modem

802.11 AP/GW(e.g. Linksys)

802.11Access Points

802.11 Gateway

At Work MobileHotSpotPortableHotSpot

Subscribers can access the Internet with EV-DO in buses, trains, hotspots by using 802.11 in the same manner as they do at home and at work

802.11802.11802.11


IOTA 802.11 Access GatewaySupporting Both SimpleIP & MobileIP

Modes of Operation


802.11 GatewayCombine several differentiating features not available in current products on

market into a low-cost gateway with protocol support for mobility, security, web and IP services

• Simultaneous support for MobileIP and SimpleIP modes of operation• MobileIP Foreign Agent/Home Agent compliant with IETF/3GPP2 standards• AAA/Radius Client & Server support

– Authentication: MobileIP authentication by Foreign Agent, Browser-based, One-time SMS password, proxy for 802.1x/EAP

– Accounting: reliability with persistent store, Interim accounting, compliance with 3GPP2 standards

– Authorization: enforce policy obtained from Home-AAA server on local network (QoS, Accounting parameters, reauthentication times, etc)

• Dynamic rate limiting QoS mechanism to provide class of service and fairness in public 802.11 deployments

• IP Services: Dynamic packet filter/firewall, HTTP redirection, DNS redirection/DNS proxy, NAT

• DHCP w/ integrated session state management• Integrated Web cache

QoS DHCP NAT

IP services

802.11Security

AAAProtocols

Security/Accounting

MIPForeignAgent

MIPHomeAgent

Mobility

WebCache

WebServer

Web Services

LocalPortal


IOTA Mobility Client Softwarefor Windows XP/2000


Multi-interface Mobile IP Client• Improving the subscriber’s experience

– Minimizing subscriber interaction when roaming across networks and networks using different air interface technologies

– One-time user authentication– Automatic client terminal configuration for network

• Dual Interface Mobile IP Client – detecting network presence and network selection– initiating switch to other interface and update packet routing– priority to 802.11 network and 802.11 network selection

• Optimized handoff by keeping 3G PPP network connection up– dormant when not in use

• Extensible to other interface types (e.g. 1xEV--DO, ethernet, 802.11a)– separation of interface specific logic

• Integrated VPN client support


Multi-interface Mobility Client Software• Unique client software not available today on the market• Seamless intra- and inter- technology handoffs using MobileIP• Management of multiple physical interfaces (802.11, 3G/PPP, Ethernet)• Automated network selection algorithm based on priority, signal

strength, and preferred network list• Mobile VPN capability: IPSec over MobileIP


Mobility Client Architecture

• Software runs on Windows 2000/XP operating system• Approximately 45,000 lines of code, 13,000 of which are Windows

NDIS kernel networking code

New code developed,Specifically for3G-802.11 integration

VPN/IPSec integration(e.g. Lucent IPSecClient)

Interaction withExisting WindowsOS modules

TCP/IP Protocol Stack

Virtual MobileIPAdaptor

VPN/IPSecControl

OS

PPP Support

Graphical User Interface & Monitoring

Ethernet

MIP State Machine

Interface Abstraction Layer/API

Network Detection

Network Selection

Main Logic

802.11 PPPCDMA2000

Sierra 3G1xRTT

VPN/IPSec Client Driver

Multi-interface Mobility Client Driver

EthernetInterface

802.11Interface

PPP Interface

IS-835 Shim

Serial Driver

AT Com

mand Set

User Level

OS K

ernel Level


MobileHotSpot Gateway


HomeAAA

MobileIPHA

“Home” network

BSBS

EV-DO WirelessAccess

EV-DORNC

F-AAA

PDSN

Internet

“Wi-Fi on the Move” with EV-DO: Architecture

MobileHotSpot GatewayCombines 802.11 AP,EV-DO Backhaul, and Public Access Gateway

Subscriber w/ 802.11Mobile-IP client

Subscriber w/ 802.11SimpleIP, no client

required

EV-DOBackhaul

Multiple users 802.11 traffic aggregatedthrough one EV-DO backhaul connection

Both the MobileHotSpot Gatewayand individual users areauthenticated to Home-AAA/Billing can be done for entireHotSpot and/or for individual users

802.11Hotspot

Multiple Networking Modesof Operation for Subscriber &

Gateway: SimpleIP or MobileIP


MobileHotSpot Gateway w/ EV-DO Backhaul

• HotSpot installation simply by applying power to gateway – no additional wiring• PPP restoration and management of changing IP address on EV-DO backhaul• Simultaneous support for MobileIP and SimpleIP modes of operation• Authentication: MobileIP authentication by Foreign Agent, Browser-based, One-time SMS password,

802.1x/EAP through Radius • Accounting: reliability with persistent store, Interim accounting, compliance with 3GPP2 standards• Authorization: enforce policy obtained from Home-AAA server on local network (QoS, Accounting

parameters, reauthentication times, etc)• Dynamic rate limiting QoS mechanism to provide class of service and fairness in public 802.11

deployments/admission control to prevent backhaul overload• IP & Web Services: Dynamic packet filter/firewall, HTTP redirection, DNS redirection/DNS proxy, NAT,

DHCP, Web Cache, Local Portal

QoS DHCP NAT

IP services

802.11Security Radius

Security/Accounting

MIPForeignAgent

PPPManagement

Mobility

WebCache

WebServer

Web Services

LocalPortal

Integrated802.11AccessPoint

IntegratedEV-DO

Backhaul

Low-cost gateway combines 802.11 Access Point, Public Access Gateway, and EV-DO backhaul in one small appliance


Picture of MobileHotSpot Gateway

• Requires Linux operating system– can support different size platforms easily

• Picture shown with dual receive EV-DO antenna and single receive 802.11 antenna (dual receive also supported on 802.11)


Value Proposition for MobileHotSpot Gateway• Promote short term uptake/usage of EV-DO

– Allow 802.11 users to access EV-DO without purchasing expensive data cards and installing new software/drivers

– Leverage large base of existing 802.11 cards and trend to have built-in 802.11 capability in laptops and PDAs

– Appeal to enterprises by removing costs associated with data cards and software support for all employees

– Differentiates EV-DO from 1xRTT• Target Markets

MobileHotSpot: deploy hotspots in buses and trains to offer Internet connectivity to “captive” commuters who spend hours a day using public transportation

PortableHotSpot: quickly provide multi-user Internet connectivity for temporary network installations without requiring costly wiring

• Enterprise applications: outdoor events, trade shows, temporary network setup for building moves, portable office setup for meetings, conference rooms, extending EV-DO data coverage in-building

• Temporary network deployments: emergency sites, cruise/freight ships docked in port• Low-cost public 802.11 hotspots: allows provider to monitor traffic usage before investing

in costly wiring and wireline backhaul service charges for hotspot • High-speed Internet access where DSL or Cable is not available (not initial target)

Potential to bring large subscriber base to EV-DO service this year

Bell Labs IOTA Technology Assets: Mobility Client Software ... · PortableHotSpot: quickly provide...

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