Exploiting logical mobility in mobile computing middleware

In the past few years, we have witnessed the growth in availability of mobile computing devices, such as mobile phones, personal digital assistants (PDAs), laptop com-puters and the like, combined with the advent of new wireless networking systems, such as 802.11b, Bluetooth, and GSM/GPRS. Users of such devices demand access to networked information and services at all times and loca-tions, and, as such, encounter different networking struc-tures and topologies. The introduction and use of mobile code techniques, from the acceptance of Java applets in web pages, to the creation of mobile agent platforms has demonstrated that it is possible to create dynamic systems that support code migration. We argue that logical mo-bility over physical mobility can offer the flexibility that traditional approaches cannot, helping to provide innova