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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-07162007-173149


Tipo di tesi
Tesi di dottorato di ricerca
Autore
Martorini, Linda
Indirizzo email
linda.martorini@iet.unipi.it, linda.martorini@gmail.com
URN
etd-07162007-173149
Titolo
A Scalable CAC Algorithm Providing StrictEnd-to-End Delay Guarantees in Networks with Aggregate Scheduling
Settore scientifico disciplinare
ING-INF/05
Corso di studi
INGEGNERIA DELL'INFORMAZIONE
Relatori
Relatore Prof. Anastasi, Giuseppe
Relatore Prof. Lenzini, Luciano
Parole chiave
  • Delay Bound
  • DiffServ
  • End-to-End
  • Network Calculus
Data inizio appello
25/05/2007
Consultabilità
Non consultabile
Data di rilascio
25/05/2047
Riassunto
Aggregate scheduling has been proposed as a solution for achieving scalability in large-size networks. However,in order to enable the provisioning of real-time services, such as video delivery or voice conversations, in aggregate scheduling networks, end-to-end delay bounds for single flows are required. In this thesis, we derive per-flow end-to-end delay bounds in aggregate scheduling networks in which per-egress(or sink-tree)aggregation is in place, and flows traffic is aggregated according to a FIFO policy. The derivation process is based on Network Calculus, which is suitably extended to this purpose. We show that the bound is tight by deriving the scenario in which it is attained. After that we investigate the problem of scalable admission control for real-time traffic in sink-tree networks employing per-aggregate resource management policies. Every traffic flow entering the network at an ingress node, and flowing towards a given egress node, specifies its leaky-bucket parameters and a required delay bound for traversing the network. We propose an algorithm (based on results previously showed)that admits a new flow if a guarantee can be given that the required delay bound, besides those of other already established flows, are not exceeded.
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