For certain Link Layer technologies this will be one of the critical issues. Channel capacity of wireless subnetworks is limited by federal regulations and link layer technologies. In addition to minimizing network resources, any scheme used to support mobile computing should be cognizant of the cost of these resources. Currently, many participants of the Internet are charged with a flat rate cost system for unlimited service. Economic factors may force a change in this pricing structure in order to more closely reflect the amount of traffic generated by a given source as well as the distance the traffic must travel to reach the final destination.
Mobile communications introduces transient effects within a network.
These transients should have limited adverse effects on other users. The ability to isolate faults created by mobile users should be considered for both individual and group behavior. Performance transparency Performance transparency implies that an application doesn't change its performance characteristics as the segment the host running an application is in, changes its attachment points. The concept of performance transparency has meaning only in the context of the on-line mobility. But even in that context its feasibility should be questioned.