CNRI for their support as well as the Ibero Ameri- can Science and Technology Consortium (ISTEC) and the University of New Mexico that provided the VoIP infrastructure for the test bed of this work. The work presented in this report is partially funded by the NSF under the Future Internet Design (FIND) Grant CNS-0627067-0626380. References [1] Rosenberg, J., H. Schulzrinne et al. 2002. RFC 3261: Session initiation protocol. June. [2] H.323 : Packet-based multimedia communications systems. http://www. tu.int/rec/T-REC-H.323-200307-I/en. Accessed July 25, 2008. Ashutosh Dutta, Faramak Vakil, Jyh cheng Chen, Miriam Tauil, Shinichi Baba, Nobuyasu Nakajima, and Henning Schulzrinne. 2001. Application layer mobility management scheme for wireless internet. In IEEE 36 wireless'01 San Francisco, CA. May. [4] Pandya, R. 1995. Emerging mobile and personal communication sys- items. IEEE Communications Magazine 33: 44-52. [5] Henning Schulzrinne and Elin Wedlund. 2000. Application-layer mobility using sip. SIGMO-BILE Mob. Computer Communication Review 4(3): 47-57. [6] Elin Wedlund, and Henning Schulzrinne. 1999. Mobility support using sip. In WOWMOM '99: Proceedings of the 2nd ACM International Workshop on Wireless Mobile Multimedia, New York, NY, USA: ACM Press, 76-82. [7] Charles E. Perkins. 2002. RFC 3220: IP mobility support for ipv4. January. http://www.rfc-editor.org/rfc/rfc3220.txt. Accessed July 25, 2008. [8] Berners-Lee, T., R. Fielding, and L. Masinter. 1998. RFC 2396: Uniform resource identifiers (URI): Generic syntax. [9] Nilanjan Banerjee, Sajal K. Das, and Arup Acharya. 2005. SIP-based mobility architecture for next generation wireless networks. In PerCom 181-90. IEEE Computer Society. Kauai, HI. March 8-12. C 2009 by Taylor & Francis Group, LLC SIP Handbook: Services, Technologies, and Security [10] The handle system. http://www.handle.net Accessed 07/25/08. [11] Sun, S., L. Lannom, and B. Boesch. 2003. Handle system overview. RFC 3650. November. [12] Sun, S., L. Lannom, and B. Boesch. 2003. Handle system names