MMWN is a modular system of link- and network-layer algorithms that enables a multihop mobile wireless network to support distributed, real-time multimedia applications. In this paper, we describe three key components of this system: the clustering procedures for de ning a virtual, hierarchical control structure superimposed on a large network of mobile switches and endpoints the location management procedures for determining the current locations of mobile endpoints relative to the hierarchical control structure and the virtual circuit management procedures for setting up and repairing virtual circuits as switches and endpoints move. We also provide performance results, obtained through simulation and analysis, which show the robustness of each of these components with respect to a broad spectrum of transmission ranges and relative mobility of switches and endpoints.