Mobility Protocols and Handover Optimization: Design, Evaluation and Application

Chapter 11System Evaluation

In this chapter, we evaluate the overall handoff system, where many of the optimization techniques that we have described in Chapter 6 function together to build a complete handoff system. We first illustrate experimental results from a few systems for both intertechnology and intratechnology handoffs, and then validate some of the optimization techniques using Petri net modeling. We demonstrate how Petri nets can model some behavioral properties of the handoff system, such as deadlocks. We also compare the performance of a few scheduling techniques that could be applied to handoff.

11.1 Summary of Key Contributions and Indicative Results

Currently, the optimization techniques for each of the handoff components in different layers are implemented independently. These optimized components have not been used in an integrated fashion to build a complete optimized handoff system. The existing experimental results from these optimization techniques have been derived for each of the individual handoff components only (e.g., discovery, authentication, and configuration). There is also no work that compares model-based results with experimental results to verify predictions of systems performance. There is no existing system evaluation technique that can verify the correctness of a handoff system or detect system anomalies of a handoff system such as deadlocks.

We have built several indicative handoff systems using the reactive, proactive, and cross-layer ...