An ad-hoc network is composed of mobile terminals with personal communication devices. Information in ad-hoc network is sent from a source to all terminals. We consider bow to sent information in the minimum step. In this report, we uses Ad-hoc network by PHSs(Personal Handyphone System) as example of problem. First, we substitute a problem of graph theory for that problem, and we propose some heuristic algorithms for the problem. After that, proposed algorithms are evaluated by the computer simulation.
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