The one hop relay selection problem is to find a node that can relay traffic from a source to a destination. The NAT traversal scheme in Skype VoIP networks is such an example. To find the optimal relay node requires a large amount of measurement traffic. Thus, a more scalable way to find a
relay node is crucial for the success of relaying. In this paper, we investigate the applicability of network distance based Euclidean coordinates for the one hop relay selection problem. Through a number of experiments with real measurement data sets, we show that the Euclidean coordinate system achieves close to the optimal performance in terms of delay.
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