An analytic study of partially ordered transport services |
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| Affiliation: | 1. Institute of Systems Engineering, Dalian University of Technology, Dalian 116024, China;2. School of Management, Zhejiang University, Hangzhou 310058, China;3. DeGroote School of Business, McMaster University, Hamilton L8S 4L8, Canada;1. School of Industrial Engineering, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile;2. Departamento de Ingeniería Civil, Universidad de Chile, Santiago, Chile;3. Département de Génie Mécanique, Université Laval, Québec, Canada;4. Departamento de Ingeniería Industrial, Universidad de Chile, Santiago, Chile;5. Instituto Sistemas Complejos de Ingeniería (ISCI), Chile |
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| Abstract: | This paper presents an analytic model for investigating the throughput, delay and buffer utilization characteristics of partially ordered transport services. We analyze the effects of packet and ack losses as well as applications' order requirements on overall system performance. The analytic model is verified by comparing its results against those of an OPNET simulation model. Analytic results show that for applications that can tolerate some reordering in the delivery of objects, use of partially ordered service instead of ordered service provides important buffer utilization and delay improvements, particularly as the loss rate increases and the order requirements of applications decrease. In terms of throughput, it makes no difference which service (i.e., ordered, partially ordered, unordered) an application uses. Analytic study also shows that by judicious choice of sender's transmission order, overall system performance can further be improved in a partially ordered service. |
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