An Liyanagama, Deepa L. creator O'Farrell, T. Chairperson Lochmann, S. Examination committee Takahashi, K. Examination committee Norwegian Agency for International Development, Norway Scholarship donor text th Bangkok Asian Institute of Technology 1992 monographic eng

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67 leaves This study is aimed at investigating the performance of a Hybrid Code Division Multiple Access I Carrier-Sense Multiple Access with Collision Detection Protocol [CDMA/CSMA-CD]. This hybrid protocol employs CDMA embedded in a carrier-sensing protocol with overload detection and is referred to as Carrier/Channel-load Sense Spread Spectrum with collision detection (CSSS/CD). This study concentrated on a one-persistent form of channel access. Depending on the channel access strategy, two different protocols, lP-CSSS/CD-1 and lP-CSSS/CD-M were identified. The network throughput was analysed for both of these protocols. The effect of bit errors, caused by multiuser interference, was also investigated for the 1 P-CSSS/CD-1 protocol with fixed length packets. With threshold approximations for the channel capacity, the network was modelled as a discrete-time semi Markov process. Results are presented showing the effects of network parameters on the throughput. These results are compared with the performance of lP-CSMA/CD [Ethernet] under the same operating conditions and it is shown that a real capacity gain over Ethernet is achieved with the spread-spectrum protocol. An additional advantage of the spread spectrum protocol is the low packet delay offered by the CDMA effect. System stability was evaluated using a general user model. A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology,1992 Spread spectrum communications Local area networks (Computer networks) Asian Institute of Technology. http://203.159.5.9/ait-thesis/detail.php?q=B17497 http://203.159.5.9/ait-thesis/detail.php?q=B17497 080598 20260818144310.0