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A Simulation Study on the Wired-Equivalent Capacity of Ad Hoc Networks Vítor Jesus, Rui L. Aguiar vjesus@av.it.pt, ruilaa@det.ua.pt Instituto de Telecomunicações, Aveiro, Portugal off between throughput capacity, delay and mobility, which Abstract— In this paper we demonstrate the concept of wired- Neely and Modiano [6] also describe. In a simple example, if equivalent capacity in ad-hoc networks through a large-scale all nodes have large enough buffers and only transmit when simulation study. A capacity model that mimics conventional (e.g.) the destination is one hop away, capacity can be experience (e.g. on wired, infrastructured networks) is proposed increased up to the link-layer limit. under a specific, yet realistic and user-oriented, assumption of the The problem of defining capacity was addressed by Nemeth maximum fair usage. Capacity is then the maximum throughput et al. [7]. They approached the problem using concepts of data capacity per node under which packet loss is similar to that of a circuits and blocking probabilities. However, their approach conventional wired network, for all nodes. We show how this capacity metric becomes predictable inside ad-hoc networks using used, for example, an ideal L2 collision avoidance algorithm. a simple power-la