Description: simulated a petri nets behavior. The procedure should be read into one group conversion rules, and a list of the state group, These conditions correspond to link layer network issued a new group or accept a new grouping, initial state is to be read into the. The procedure should start from the initial state, randomly selecting those activated conversion, and to stimulate these states, check to see if it "one of the hosts for a two and the other host has not issued during this period of a new" the same situation.
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