Our research focuses on next generation Advanced IPV6 Mobility management exploring complex operational scenarios through discrete event simulation. To this end, our study builds on knowledge acquired through NS-2 extended over the OPNET Modeler (v.10 or later) engine for:
 

Modelling of Proactive IPv6 Mobility Management for next Generation Wireless LAN Access Networks (2004)

 

A major challenge in building 'all-IP' wireless access networks, 
besides the use of IP as the unifying layer, relates to transparency 
of the IP handoff process as the mobile node (MN) transits across 
heterogeneous wireless network domains in IP Mobility 
Management (IPMM). Transparency in IP handoffs, 
however, must be effected in two separate contexts: IP-addressing and 
(re-)connection latency. Excessive delays during an IP handoff degrades 
the seamlessness of IP transmission between the MN and its peers. 
This is especially important for Multimedia interactive real-time 
applications which have stringent end-to-end delay requirements.

Our research looks into the notion of Proactivity in IP Mobility 
Management Protocol architectures. It investigates the performance
gains of a Proactive MIPv6 mobility management scheme effected 
through multicasting over Wireless LAN (802.11b) access networks

 We evaluate performance by means of both simulation and
experimental results attained from measurements to-date and contrast
with existing MIPv6 standards.

Publications

• Proactive Mobile IPv6 for Context-aware  all-IP Wireless Access Networks (2005)
  

In this study, we assess experimentally how transport protocols such as TCP 
and subsequently applications can under-perform as the MN performs an IP 
handoff between two heterogeneous wireless networks, namely WLAN and 
GPRS. We discuss why dynamic establishment of IP context-state can help
address these limitations that seem inherent in heterogeneous environments. 
To this end, we evaluate by means of simulations, the Proactive Mobile IPv6 
as a means of effecting advance context-state establishment, between 
candidate points of attachment, for the purposes of reducing/eliminating IP 
handoff delay while providing IPv6 handoff selectivity.

T. Pagtzis, R. Chakravorty, J. Crowcroft, S. Hailes and P. Kirstein. 
"Proactive Mobile IPv6 for Context-aware all-IP Wireless Access Networks", 
In Proceedings of the Annual IEEE Conference on Wireless 
Communications (WirelessComm), Hawaii, US, June, 2005 (to appear)