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Seminar on Network Security
Introduction of the topics and some material for the session of4G networks
Charging for mobile Internet access
Tutor: Tuomas Aura-
Required prior skills:
- outline the business model for universal wireless LAN access,
- outline the security requirements for billing wireless LAN access,
- overview and evaluate existing technologies and published plans for implementing access authorization, accounting and billing in wireless LANs,
- evaluate the suitability of these systems for universal mobile Internet access,
- compare the these technologies with 2nd and 3rd generation mobile telephone networks, and
- outline the components that is still missing.
- IETF Authentication, Authorization and Accounting (aaa) Working Group http://www.ietf.org/html.charters/aaa-charter.html
- IETF IP Routing for Wireless/Mobile Hosts (mobileip) Working Group http://www.ietf.org/html.charters/mobileip-charter.html
- P. Calhoun, A. Rubens, H. Akhtar, and E. Guttman. DIAMETER Base Protocol. Internet Draft, Internet Engineering Task Force.
- C. Rigney, A. Rubens, W. Simpson, and S. Willens. Remote Authentication Dial In User Service (RADIUS). Request for Comments (Proposed Standard) 2138, Internet Engineering Task Force, April 1997.
- Sami Levijoki, Authentication, Authorization and Accounting in Ad Hoc networks, HUT TML Internetworking Seminar, April 2000. http://www.hut.fi/~slevijok/aaa.htm
- Ipay project (ohjelmatyv) at HUT in 1999-2000: http://www.niksula.cs.hut.fi/~slevijok/ipay/ipay.html
The GO-SEC project at HUT also has some relation to mobile IP access authorization and charging.
Look for the keywords "mobile IP", "accounting", "authorization" and "billing".
Some understanding of mobile IP technology and electronic commerce protocols would help a lot.
As wireless LANs are becoming commonplace, the need arises for the wireless devices to move transparently across LAN boundaries and even between network domains. Universal mobile Internet access could be provided by combining the locally operated LANs into a global, publicly accessible network. While protocols like DHCP and Mobile IP make it technically possible for a mobile user to access the Internet through any wireless LAN and even to move across networks, most network owners allow access only for their own users.
One of the greatest challenges in implementing the vision of global mobile Internet access is to find incentives for network owners to open their wireless networks for public use, and to build wireless LANs to public spaces. The solution could be an accounting and billing system that makes it possible for LAN owners to trade excess capacity in their own LANs and to get revenue from LANs installed in public spaces. In the long run, there might be operators that do not build their own networks but instead broker wireless LAN capacity.
The seminar paper should
The paper may emphasize either technical solutions or the business and requirement side. A more experienced student could write a detailed paper on some particular technology or develop his or her own vision of 4th generation wireless networks. As a tutor, I would like to encourage small, original research contributions.
Some pointers to technical material:
The Dynamic Host Configuration Protocol (DHCP)
Tutor: Joanna Oja-
The Dynamic Host Configuration Protocol (DHCP) is a protocol for a
computer to obtain automatically the TCP/IP configuration. DHCP can be
used to automatically assign IP addresses, to deliver TCP/IP stack
configuration parameters, or to provide other configuration
information.
- IETF Dynamic Host Configuration (DHC) working group
http://www.ietf.org/html.charters/dhc-charter.html
- Resources for DHCP
http://www.dhcp.org/
This page is maintained by Network Security teaching staff, E-mail: netsec@tml.hut.fi.
The page has been last updated on August 31, 2000
URL: http://www.tml.hut.fi/Opinnot/Tik-110.501/2000/intro/4g.html
Basic security considerations as the dhcp is a client-server model are authentication of both sides, availability of DHCP service, and integrity of communication. More advanced item is applicability for ad hoc-networking and interoperability with other dynamic configuration protocols.
Material to begin with: