Networking

Network Stability Under Alpha Fair Bandwidth Allocation With General File Size Distribution

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Executive Summary

Rate allocation among a fixed set of end-to-end connections in the Internet is carried out by congestion control, which has a well established model: it optimizes a concave network utility, a particular case of which is the alpha-fair bandwidth allocation. This paper studies the slower dynamics of connections themselves that arrive randomly in the network and are served at the allocated rate. It has been shown that under the condition that the mean offered load at each link is less than its capacity, the resulting queuing system is stochastically stable, for the case of exponentially distributed file-sizes.

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