Thesis (MSc)--Stellenbosch University, 2003. / ENGLISH ABSTRACT: Routing policies for packet-switched communication networks must be able to adapt
to changing traffic patterns and topologies. We study the feasibility of implementing
an adaptive routing policy using the Q-Learning algorithm which learns sequences of
actions from delayed rewards. The Q-Routing algorithm adapts a network's routing
policy based on local information alone and converges toward an optimal solution. We
demonstrate that Q-Routing is a viable alternative to other adaptive routing methods
such as Bellman-Ford. We also study variations of Q-Routing designed to better explore
possible routes and to take into consideration limited buffer size and optimize multiple
objectives. / AFRIKAANSE OPSOMMING:Die roetering in kommunikasienetwerke moet kan aanpas by veranderings in netwerktopologie
en verkeersverspreidings. Ons bestudeer die bruikbaarheid van 'n aanpasbare
roeteringsalgoritme gebaseer op die "Q-Learning"-algoritme wat dit moontlik maak om
'n reeks besluite te kan neem gebaseer op vertraagde vergoedings. Die roeteringsalgoritme
gebruik slegs nabygelee inligting om roeteringsbesluite te maak en konvergeer na
'n optimale oplossing. Ons demonstreer dat die roeteringsalgoritme 'n goeie alternatief
vir aanpasbare roetering is, aangesien dit in baie opsigte beter vaar as die Bellman-Ford
algoritme. Ons bestudeer ook variasies van die roeteringsalgoritme wat beter paaie kan
ontdek, minder geheue gebruik by netwerkelemente, en wat meer as een doelfunksie
kan optimeer.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/53570 |
| Date | 04 1900 |
| Creators | Andrag, Walter H. |
| Contributors | Omlin, Christian W., Stellenbosch University. Faculty of Science. Dept. of Mathematical Sciences. Computer Science. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | 67 p : ill. |
| Rights | Stellenbosch University |
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