| Author | Somyos Tassanagraivut |
| Call Number | AIT Thesis no.TC-97-2 |
| Subject(s) | Fiber Distributed Data Interface (Computer network standard)
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| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. TC-97-2 |
| Abstract | Fiber Distributed Data Interface (FDDI) is a high speed local area network operating at 100 Mbps offering a high bit rate which is required for broadband applications. However, the increasing demand for larger networks with higher capacity and additional services has resulted the multiple FDDI networks needing to be interconnected. The valuable performance of such networks can be provided by evaluating the end-to-end performance as seen by endusers. The end-to-end performance of interconnecting two FDDI rings via a local bridge is investigated where both synchronous and asynchronous traffic is presented. The end-to-end performance has to take into account not only transmission network and medium access protocol but also the higher layer of OSI reference protocols. The simulation model is obtained by incorporating the two layer modeling concept and the closed queueing network model. The influence of Target Token Rotation Time (TTRT), Synchronous bandwidth allocation Time (ST), window size and traffic ratio on the performances of the proposed network is studied in the presentation of both synchronous and asynchronous traffic. The results presented show that these performance parameters considerably affect the performances of both synchronous and asynchronous traffic and of both intra-ring and interring. The optimum value of the parameters is obtained by tradeoff among end-to-end packet and message delay, end-to-end throughput, throughput of network, and maximum queue size of both synchronous and asynchronous traffic and of both intra-ring and inter-ring to provide good performances for all ranges of offered loads. This causes the different selection of performance parameters from the previous published references that only the performance of synchronous traffic has been considered. Moreover, the upper bound value of ST assigned to the bridge is proposed and approximated from the point that the maximum number of transmitted synchronous packets per token arrival at a station starts to decrease. The results when traffic ratio is studied show that the bottleneck is instead presented in synchronous traffic when the inter-ring traffic is increased due to the unsuitable assignment of ST at the bridge. It is recommended that ST which is assigned to the bridge should be increased as the inter-ring traffic is also increased to obtain a good performance of synchronous traffic. |
| Year | 1997 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. TC-97-2 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Telecommunications (TC) |
| Chairperson(s) | Erke, Tapio |
| Examination Committee(s) | Chindakorn Tuchinda;Yulu, Qi |
| Scholarship Donor(s) | Asian Institute of Technology Partial Scholarship. |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1997 |