![](bgb.png)
On the one hand, this allowed us to better describe the scenarios in an understandable
manner and provided us with a qualitative impression of the advantages and
disadvantages of each approach. However, on the other hand this prevented us from
achieving a completely accurate comparison in terms of number of used messages and
message sizes. This can only be realized after a detailed definition of the
communication scenario and AAA protocols and infrastructure used. Nevertheless,
this brief overview already gives a clear picture of the pros and cons of each
approach. Probably the most valuable result obtained here is that all scenarios have
their pros and cons and which one to use can only be decided based on the usage
scenario, the supported services and the current infrastructure of the provider.
References
1. J. Rosenberg, H. Schulzrinne, G. Camarillo, A. Johnston, J. Peterson, R. Spark, M. Handley,
E. Schooler, “Session Initiation Protocol”, RFC3261
2. 3GPP Technical Specification 3GPP TS 33.102 V3.6.0: "Technical Specification Group
Services and System Aspects; 3G Security; Security Architecture (Release 1999)", 3rd
Generation Partnership Project, November 2000
3. Pat R. Calhoun, et al.; ”Diameter Base Protocol”, RFC 3358, September 2003
4. Rigney, C., Willens, S., Rubens, A. and W. Simpson, "Remote Authentication Dial In User
Service (RADIUS)", RFC 2865, June 2000.
5. H. Schulzrinne, “Dynamic Host Configuration Protocol (DHCP-for-IPv4) Option for
Session Initiation Protocol (SIP) Servers” RFC 3361, August 2002
6. D. Willis, B. Hoeneisen, “Session Initiation Protocol (SIP) Extension Header Field for
Service Route Discovery During Registration “, RFC 3608, October 2003
7. 3GPP Technical Specification 3GPP TS 24.228 " Technical Specification Group Core
Network; Signalling flows for the IP multimedia call control based on SIP and SDP", 3GPP,
2003
8. J. Vollbrecht, P. Calhoun, S. Farrell, L. Gommans, G. Gross, B. de Bruijn, C. de Laat, M.
Holdrege, D. Spence: AAA Authorization Framework; IETF, RFC 2904, August 2000.
9. J. Vollbrecht, P. Calhoun, S. Farrell, L. Gommans, G. Gross, B. de Bruijn, C. de Laat, M.
Holdrege, D. Spence: AAA Authorization Application Examples; IETF, RFC 2905, August
2000.
10. S. Glass, T. Miller, S. Jacobs, C. Perkins, “Mobile IP Authentication, Authorization, and
Accounting Requirements”, IETF, RFC 2977, October 2000
11. W. Marshall, F. Andreasen, D. Evans, “Private Session Initiation Protocol (SIP) Extensions
for Media Authorization”, RFC 3312, January 2003
12. Sinnreich, Rawlins, Gross, Thomas, "QoS and AAA Usage with SIP based IP
communication", Internet Draft, Internet Engineering Task Force, October 2001
13. Camarillo, et al., “Integration of Resource Management and SIP”, RFC 3312, October 2002
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