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In this paper we study the properties of protocol independent multicast (PIM) in non-strictly hierarchical network environments. In particular, we investigate the cost (overhead) behaviour of the PIM protocols i.e., sparse mode (PIM-SM), dense mode with flood and prune mechanism (PIM-DMFP), dense mode with state refresh (PIM-DMSR), and source specific(More)
Controlling crimes in institutions of higher learning requires the ability of an in-depth analysis of the current situation. For understanding of the current situation and deducing consequences for taking actions, higher-level reasoning about the situation has to take place. In this paper, an approach for situation awareness for cult activities is(More)
This paper provides analytical tools to assess the improvements of existing, modified or entirely new multicast protocols at an early stage of design. In particular, we investigate the general properties of sparse mode (SM) and dense mode (DM) protocols and their variants. Specifically, we quantify the performance of these protocols in a ring topology(More)
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