Dear Folks, please let me advertise you a research paper about a flat and distributed HIP scheme for future mobile networks: Title: Evaluation of two integrated signalling schemes for the Ultra Flat Architecture using SIP, IEEE 802.21, and HIP/PMIP protocols ACM link: http://portal.acm.org/citation.cfm?id=1975468 DOI: http://dx.doi.org/10.1016/j.comnet.2011.02.005 I hope you will find the above article interesting, and also that you will provide us with feedbacks on our work. Best regards, goodzi -- László BOKOR Budapest University of Technology and Economics (BME) Department of Telecommunications (HIT) - Mobile Innovation Centre (MIK) Tel: +36-1-463-3420, Fax: +36-1-463-3307 web: http://www.hit.bme.hu/~bokorl