Abstract: The statistical model of the communication modes has established the theoretical foundation for pansynchronous communication on a 2dimenssional network, based on which some trial applications have been started. The strict formal definition of the communication process decision tree and the inductive definition of the time dependent equal tipprobability tree, and concepts of full symmetric, full, uniform, semiuniform, almost semiuniform were derived. A discussion of the relation of probability distribution of tips and probability distributions of segments at each node was presented, and two theorems were proved. These definitions and concepts will set the theoretical framework for generating communication modes by artificial intelligence in the future.

Key words: communication process decision tree, pancommunication, computerand networkmediated communication