Scalability and Performance Evaluation of Hierarchical Hybrid Wireless Networks

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Executive Summary

This paper considers the problem of scaling ad hoc wireless networks now being applied to urban mesh and sensor network scenarios. Previous results have shown that the inherent scaling problems of a multihop "Flat" ad hoc wireless network can be improved by a "Hybrid network" with an appropriate proportion of radio nodes with wired network connections. This paper generalizes the system model to a hierarchical hybrid wireless network with three tiers of radio nodes: low-power end-user Mobile Nodes (MNs) at the lowest tier, higher power radio Forwarding Nodes (FNs) that support multihop routing at intermediate level, and wired Access Points (APs) at the highest level.

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