English

DTIC ADA064729: Electrical Engineering Digital Design Laboratory Communications Network. Part 1 and 2.

Four types of network routing algorithms were investigated as candidates for use in the proposed AFIT Electrical Engineering Digital Engineering Laboratory (DEL) network. The four types were deterministic, isolated, centralized and distributed. The advantages and disadvantages of each type of network routing algorithm were evaluated for possible use in the DEL network. The distributed routing algorithm was selected for the proposed DEL network because it was found to be more efficient and reliable. The educational benefits of the distributed routing algorithm were also discussed. In order to improve the distributed routing algorithm's response time to changes in the network topology and traffic flow and to reduce the algorithm's oscillation caused by changes in the network topology a technique known as 'hold down' was incorporated. A description of the routing algorithm, including this 'hold down' technique, is discussed in sufficient detail to permit implementation of the algorithm into the proposed DEL network. In addition to the description of the distributed routing algorithm, several types of communications protocols were investigated for use in the node-to-node network. The A

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