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Open Access Publications from the University of California

Performance analysis of a broadcast star local area network with collision avoidance. Part 2, Finite station population model


In order to overcome the performance bottleneck due to collisions and their resolution in random access LANs, a new network architecture called a broadcast star network with collision avoidance has been proposed and studied by many researchers [2 - 15]. The performance of a broadcast star network is also studied in a companion paper [11], assuming an infinite station population and synchronous operation of the network.

In this paper, we analyze the performance of a broadcast star network assuming a finite number of stations, and we obtain the throughput and the distribution of transmission delays. An exact analysis is presented first. However, this analysis is computationally practical for networks with a small number of stations only. Therefore, an approximate analysis is also presented for a network having a large number of stations. The accuracy of our approximation is examined through simulations.

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