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Publikācija: Multimedia Overlay Network Topologies

Publication Type Publications in RTU scientific journal
Funding for basic activity Unknown
Defending: ,
Publication language Latvian (lv)
Title in original language Multimediju pārklājuma tīklu topoloģijas un to salīdzinājums
Title in English Multimedia Overlay Network Topologies
Field of research 2. Engineering and technology
Sub-field of research 2.2 Electrical engineering, Electronic engineering, Information and communication engineering
Authors Aigars Riekstiņš
Keywords overlay networks, multimedia networks, topology, simulation, network measurement parameters
Abstract Rakstā dota pārklājuma tīklu izveides metode multimediju komunikāciju sistēmas izveidei. Metode balstās uz esošā tīkla mērījumu veikšanu režģtīkla topoloģijā ar sekojošu koka topoloģijas izveidi balstoties uz mērījumos iegūto atlikušo caurlaides joslu un aizkaves novērtējumu. Darbā dots divu kritēriju apvienošanas algoritms īsākā un liekākā joslas platuma ceļa izvēlei kombinējot šos divus parametrus un šādi veidota pārklājuma tīkla simulācijas rezultāti ns2 simulātorā.
Abstract in English In this work is discussed multimedia data overlay network design from topology control standpoint. Work introduces method for overlay topology creation in small group multimedia communication systems. In first chapter introduction in overlay networking for multimedia communications is given with basic problem statement for discussed case. In the second chapter is presented previous work in the given field of interest with overlay networks classification and considerations for future work development. Second chapter also shows limitations on choosing of possible topologies. Third chapter discusses measurement types and their chose reasoning. We use delay and bandwidth as measurement parameters in our case as packet loss in today’s Internet is small and can be compensated with FEC algorithms. Fourth chapter gives method which is used to choose optimal interconnect topology in overlay network. This chapter shows example of such topology for multimedia conferencing system consisting of two topologies, one fully connected topology for measurement and fault tolerance and second tree topology for delivery of data in such interconnect. We interchange two parameters (bandwidth and delay) by one – bandwidth delay product (BDP) and then optimize tree topology by this parameter creating shortest path tree. Fifth chapter shows simulation experiment setup in discrete event simulator ns2 and presents simulations results for lightly loaded network of 3037 nodes in which ten pairs configures overlay network with given method. Sixth chapter presents conclusions and future work directions. By chosen criteria it is clear that overlay network topology which is created with given method is better by packet loss and delay metrics.
Reference Riekstiņš, A. Multimedia Overlay Network Topologies. Technologies of Computer Control. Vol.42, 2010, pp.63-67. ISSN 1407-7493.
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