Thesis (MSc (Mathematical Sciences. Computer Science))--University of Stellenbosch, 2008. / Consider a path-oriented telecommunications network where calls arrive to each route in a
Poisson process. Each call brings on average a fixed number of packets that are offered to
route. The packet inter-arrival times and the packet lengths are exponentially distributed.
Each route can queue a finite number of packets while one packet is being transmitted. Each
accepted packet/call generates an amount of revenue for the route manager. At specified
time instants a route manager can acquire additional capacity (“interface capacity”) in
order to carry more calls and/or the manager can acquire additional buffer space in order
to carry more packets, in which cases the manager earns more revenue; alternatively a
route manager can earn additional revenue by selling surplus interface capacity and/or by
selling surplus buffer space to other route managers that (possibly temporarily) value it
more highly. We present a method for efficiently computing the buying and the selling
prices of buffer space.
Moreover, we propose a bandwidth reallocation scheme capable of improving the network
overall rate of earning revenue at both the call level and the packet level. Our
reallocation scheme combines the Erlang price [4] and our proposed buffer space price
(M/M/1/K prices) to reallocate interface capacity and buffer space among routes. The
proposed scheme uses local rules and decides whether or not to adjust the interface capacity
and/or the buffer space. Simulation results show that the reallocation scheme achieves
good performance when applied to a fictitious network of 30-nodes and 46-links based on
the geography of Europe.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/1933 |
| Date | 03 1900 |
| Creators | Lusilao-Zodi, Guy-Alain |
| Contributors | Krzesinski, A. E., University of Stellenbosch. Faculty of Science. Dept. of Mathematical Sciences. Institute for Applied Computer Science. |
| Publisher | Stellenbosch : University of Stellenbosch |
| Source Sets | South African National ETD Portal |
| Language | English |
| Detected Language | English |
| Type | Thesis |
| Rights | University of Stellenbosch |
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