Sampling restricted access networks

It is interesting to apply them to the same RAN and compare the information collected by each method. For each node it is relatively easy to determine the outgoing arcs. But it is difficult to determine the arcs pointing to it. This requires information about the entire network, or a great part of it. An interesting question concerns the size of the sample in order to be able to say something about the structure of the network with sufficient precision. The paper only is a first exploration of the area. It is partly based on existing literature and partly on ideas from the author. It may very well be that these ideas have been described in the literature before, however unbeknownst to the present author.