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Technical Challenges in Mobile Wireless Internetworking

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Address auto-configuration suitable for the mobile Internet ... Nokia Research Center developing fast, smooth, seamless handovers for mobile IPv6 ... – PowerPoint PPT presentation

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Title: Technical Challenges in Mobile Wireless Internetworking


1
Technical Challenges in Mobile Wireless
Inter-networking
  • Rajeev Koodli
  • Nokia Research Center
  • Mountain View, CA USA
  • Rajeev.Koodli_at_Nokia.com

2
Outline
  • Motivation
  • Challenges
  • Work in Progress
  • Conclusions

3
Motivation
  • Untethered, Ubiquitous network access
  • Multitude of services

4
Global Internet
W-CDMA
WLAN
handover
IP Backbone
Cable
EDGE
roaming
5
How do we get there ?
  • Access independent network connectivity and
    services
  • Sufficient address space
  • Handle user and device mobility
  • Support for security

6
Access Independence
  • Cellular, Wireless LAN, DSL, Cable,..
  • Single notion of authenticated network access
    after link establishment
  • AAA effort in IETF
  • Receive data sent to the home network in the
    presence of user roaming
  • Mobile IP effort in IETF

7
Addressing Devices
  • Billion (or more) devices accessing the network
  • Each needs a unique address
  • Current Internet Protocol version 4 has
    limitations
  • address allocation scheme inefficient
  • address management schemes do not scale well
  • Easy-to-use and Easy-to-manage solution is needed
  • Internet Protocol version 6 (IPv6) offers this
    plug-and-play support

8
Device Mobility
  • Majority of the devices accessing the network
    will be wireless and mobile
  • Mobility while involved in active communication
    brings the dimension of handling handovers
  • support for real-time applications requires Fast
    Handovers
  • Smooth Handovers dampen the effect of packet loss
  • Network context (e.g., QoS, security keys)
    transfer is also crucial
  • Micro-mobility management addresses localizing
    control signaling to the visited domain

9
Security
  • Support for authentication and authorization
    necessary when a user changes access network
  • Authentication is also necessary when routing
    tables need to be updated to forward data to the
    mobile node in a visited network
  • Encryption of payload may be necessary for
    certain applictions
  • IPSec, Authentication Header (AH)

10
Work in Progress (in IETF)
  • Mobile IPv6
  • AAA, AAA-Mobile IP
  • Fast Handovers for IPv6
  • Regional Registrations

11
Summary and Conclusions
  • Future Internet is largely wireless and mobile
  • IPv6 needed for billions of wireless devices
  • Address auto-configuration suitable for the
    mobile Internet
  • Mobile IPv6 is far better and more efficient
  • Security is a key component for success
  • AAA has a big role to play for wide area wireless
    rollout
  • Nokia Research Center developing fast, smooth,
    seamless handovers for mobile IPv6
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