1 / 24

Integration of 802.11 and Third-Generation Wireless Data Networks

Integration of 802.11 and Third-Generation Wireless Data Networks. 1.Introduction 2.Service scenario in Integrated 802.11&3G 3.Two architecture for 802.11 & 3G integration 4.The IOTA 802.11 gateway 5.IOTA client software 6.Experimental results

nyssa-garrison
Télécharger la présentation

Integration of 802.11 and Third-Generation Wireless Data Networks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Integration of 802.11 and Third-Generation Wireless Data Networks • 1.Introduction • 2.Service scenario in Integrated 802.11&3G • 3.Two architecture for 802.11 & 3G integration • 4.The IOTA 802.11 gateway • 5.IOTA client software • 6.Experimental results • 7.Conclusion Speaker :林家彬

  2. 1.Introduction 802.11 vs. 3G(roughly)

  3. 1.1 Why is it the challenging task to integrate them? • Environment enterprise and home networks VS. global areas • Capability 1.WLANlack AAA and billing mechanisms 2.CDMA2000 or UMTS and their extension to 802.11 • QOS • POLICY

  4. 1.2Research Contributions

  5. 2. Service Scenario in integrated 802.11 and 3G networks: problem statement • Issues on John’s case: 1.Security association 2.Switching occurs when John is on sessions. 3.User profile obtained (AAA server) 4.Revenue sharing

  6. 3.Two architecture for 802.11 and 3G integration • A. Tightly-coupled Interworking -- The rationale:802.11 as another 3G access network. • B. Loosely-coupled Interworking – It completely separates the data paths in 802.11 and 3G networks

  7. A. Tightly-coupled Interworking

  8. Disadvantages of tightly-coupled Interworking • 1.Traffic engineering -Operator must own both the 802.11 and 3G parts of the network. -setup of the entire network should be remodified because traffic load increased 25~100 times . • 2.The configuration of the client devices -built-in USIM,R-UIM slots or external cards must bi plugged separately in to the subscriber devices .

  9. B. Loosely-coupled Interworking

  10. Advantages to the loosely-coupled integration • 1.Independent deployment and traffic engineering of 802.11 and 3G • 2.Roaming agreements with many partners can result in widespread coverage. • 3.No longer establish separate accounts • 4.Allows WISP to provide its own hot-spot

  11. 4.The IOTA 802.11 Gateway • 1. Integration of two access technologies (IOTA) • 2. Allows the mobile node to access the network. • 3. IOTA integrates RADIUS server, Mobile-IP, dynamic firewall, QOS module and accounting module. • 4. IOTA building blocks are implemented as software modules ,and run on Linux.

  12. A.RADIUS server -It enables roaming agreements between 3G and 802.11 -provides authentication services to the 802.11 cloud. • B. Mobile-IP agent -supports the roles of both home and foreign agents (HA,FA) • C. Dynamic firewall -implemented using the Linux IP filter architecture. Obtained from the subscriber’s home AAA.

  13. D.QOS module -750Kbps for Gold. -250Kbps for Silver . -125 Kbps for Bronze. E. Accounting module -share revenue

  14. F. Integrated web cache

  15. G. Simple-IP operation -offers integrated authentication and billing. -Does not support seamless mobility, and requires manual user intervention to switch network access. • H. Integration with UMTS -The current UMTS standards do not include support for the I ET F AAA and Mobile –IP protocol -It is expected that the definition of usage for AAA and Mobile-IP within UMTS will soon become standardized.

  16. 5.IOTA client software • Support mobility across several kinds of physical interfaces. • Seamless: -A user doesn’t see any changes in his connections. • Selection of interface to use dependent on user preference: • The GUI allows the user to configure, monitor, and control the state of the client.

  17. A. Interface Selection Algorithm • A novel interface-selection algorithm that uses the current signal strength and the priority of the interfaces to select the active interface. • Goal—introduce a hysteresis effect and let the client stay with the current interface to prevent data loss.

  18. 6. Experimental result • A. Performance of Mobile-IP agents • First-registration delay= AAA authentication + setting up packet filter+ creating tunnels • Re-registration delay= AAA authentication • Switching-registration delay=AAA authentication + creating tunnels

  19. B. Performance of QOS mechanisms (two scenarios) • The first scenario illustrates restricting per-user traffic to 3.5Mbps

  20. The second scenario :class-based with Gold ,Silver and Bronze.

  21. 7.Conclusion • 1.Two architectural choices for the integration: tightly & loosely • 2.Described in detail our realization of the loosely-coupled architecture in the form of the IOTA gateway • 3.Described client software . • 4.Sample experimental results .

More Related