User agent migration policies in wireless networks

摘要

Wireless networks often employ network-based user agents asnproxies for mobile users. In this paper, we consider the fundamentalnproblem of designing migration policies for these user agents. We firstnintroduce a general framework for analyzing user agent migrationnpolicies, and then highlight, through analysis and simulation, thennumerous parameters and tradeoffs that dictate the design of migrationnpolicies. We evaluate these policies in the context of both homogeneousnand heterogeneous networks, and in the presence and absence ofnprocessing overheads due to migration. Finally, we identify two simplenthreshold-based policies that deliver very good performance over a widenrange of system parameters and configurations. To our knowledge, this isnthe first paper to propose and evaluate policies for migration of usernagents