Toggle Main Menu Toggle Search

Open Access padlockePrints

Fast Generation of Scale Free Networks with Directed Arcs

Lookup NU author(s): Huqui Zhang, Professor Aad van Moorsel



To evaluate peer-to-peer systems through discrete-event simulation, one needs to be able to generate sufficiently large networks of nodes that exhibit the desired properties, such as the scale-free nature of the connectivity graph. In applications such as the web of trust or analysis of hyperlink structures, the direction of the arcs between two nodes is relevant and one therefore generates directed graphs. In this paper we introduce model to generate directed scale free graphs without multiple arcs between the same pair of nodes and loops. This model is based on existing models that allows multiple arcs and loops, but considerably more challenging to implement in an efficient manner. We therefore design and implement a set of algorithms and compare them with respect to CPU and memory use, in terms of both theoretical complexity analysis and experimental results. We will show through experiments that with the fastest algorithms networks with a million or more nodes can generated in mere seconds.

Publication metadata

Author(s): Zhang H, van Moorsel A

Publication type: Report

Publication status: Published

Series Title: School of Computing Science Technical Report Series

Year: 2009

Pages: 14

Print publication date: 01/02/2009

Source Publication Date: February 2009

Report Number: 1138

Institution: School of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne