Performance of a wireless ad hoc network supporting ATM

Abstract

A wireless ad hoc multihop network is introduced and protocols for the air interface are described and evaluated. The network nodes are assumed able to route connections according to the current radio connectivity of the network. The decentrally organized network can guarantee the bandwidth contracted to a connection (e.g. ATM connection) in a hidden station environment by means of contention-free data transmission for both, channel and packet switched services, based on real channel connections (RCCs). Channels are established and used for the duration of a so called train of data packets, released when the train ends and reestablished when the next train arrives. Most efficient use of the spectrum capacity is provided by a mechanism for dynamic channel allocation to nodes and services. To guarantee availability of network capacity for the re-establishment of a connection, connection admission control is applied considering the overall interference situation and the current radio connectivity. A performance evaluation of the proposed protocols is presented by means of a simulation study for example scenarios.