If some subscriptions in the inverted index of spatial-oriented prefixes (L) are not relevant to a node R (a dummy message
) in the TMR-tree, these subscriptions can be safely pruned from L since R's children (other dummy messages
or true messages) cannot be relevant to these subscriptions with certainty.
It should send a dummy message
to the channel with probability [r.sub.f,t].
"They created a fictitious First US Army Group in Kent complete with inflatable tanks and landing craft, fake airfields and radio stations sending dummy messages
Meanwhile, the scientific intelligence officer was busy plotting the spread of radiation across the area using dummy messages
sent by directing staff.