ns-2 Models for simulating a novel beyond 3G cellular multi-hop network

Abstract

Universal Mobile Telecommunications Systems (UMTS) is a third-generation cellular network that enables high-speed wireless Internet connectivity. On the other hand, the IEEE 802.11 ad hoc mode enables peer-to-peer short-range communications without infrastructure support. In this paper, we describe the design and implementation of a novel integrated UMTS and IEEE 802.11 ad hoc network modules in the Network Simulator (ns-2). The implementation is described from an overall design architecture to the realization of different architectural parts. A new mobile gateway is specially designed for the integrated network. With the hiearchial addressing mechanism, routing for the integrated network from wired network in UMTS network to the ad hoc network is realized. Simulations were carried out to validate the design and implementation in ns-2. Using our ns-2 modules, protocol designers can desgin and evaluate new protocols that run on such an integrated network.