Rashid, Dewan Md. Mamunur creator Nanda, Navnit Kumar Chairperson Lewis, George T. Examination Committee Skjesol, Trond Examination Committee The Federal Republic of Germany (DAAD ) Scholarship Donor text series technical report th Bangkok Asian Institute of Technology 1988 continuing eng 64 p. This Research study is directed towards t he problems of Routing in packet switched communication networks. Its a function performed in the third layer (network layer) of the OSI 7 layer architecture. The objective of good routing is to achieve overall minimum time delay for packet transmission. Delay occurs because of queueing and processing delay in the nodes , propagation delay in the channels. From the basics of queueing theory it is seen that the expression for time d e lay (it is called the objective function) is a non- linear function in terms of the link flows, capacities of the channels etc. The function methods; Gradient software package methods have been for time delay has been minimized by using two Projection Method and by using NPSOL , a for minimizing non- linear functions. Th ese implemented for few representative networks . A comparison between the optimal routing and the best fixed routing has been done. It is concluded that in optimal routing , the time delay is mini mi zed by distributing the packets over the available links in the network in a correct manner. A research study submitted in partial fulfillment of the requirements for the the degree of Master of Engineering, School of Engineering and Technology Research Studies Project Report (M. Eng.) - Asian Institute of Technology, 1988 Computer networks Asian Institute of Technology. Research studies project report ; http://203.159.5.9/ait-thesis/detail.php?q=B18809 http://203.159.5.9/ait-thesis/detail.php?q=B18809 241198 20260818223116.0