Mobility footprint refers to the size, weight, and energy demand of the hardware that must be
carried by a mobile user to be effective at any time and place. The ideal of a zero mobility
footprint is achievable by encapsulating personal computing state in a virtual machine (VM)
and delivering it over the Internet to a locally-obtained computer close to the user. In
locations with poor Internet connectivity, the demands placed on WAN bandwidth can result
in unacceptable user experience. We show how this challenge can be overcome by using …

Parcel defined as" clean" when first pulled from server If parcel is modified, then parcel
declared" dirty" Dirty parcels need to be sent back to the server Smartphone must keep
copies of all dirty data which has not yet been successfully sent to the server Caching dirty
parcel on smartphone reduces network dependency