1. “VINE ” Vertical integration of QoS in heterogeneous networks Prof. Olav Lysne Ass. Prof. Tor Skeie

2. 2 What is QoS? The ability of the network to give some level of guarantees on its performance to connections, or sets of connections. –Bandwidth (Kb/sec) –Latency (milliseconds) –Packet loss (percent) –Variance in latency (jitter) –…

3. 3 Why Quality of service? To support recent and future multimedia-based applications… –Telephony –TV- and radio like applications –Video-conferences –Distance education –Surveillance –Cooperative work over distance –…–… …in one integrated network infrastructure Yes, but why is that difficult?

4. 4 C.b B.a A.a A.c Overlay architecture a b b a a C A B d c b c IP-link

5. 5 QoS mechanisms in the infrastructure a b b a a C A B d A.a A.c C.b B.a c b c IP-link abstraction IP Network layer Layer two technologies IP IP Transport layer IP QoS: IntServ, DiffServ RSVP, MPLS… IP Application layer Physical QoS Protocol Layers Techn. 1 Physical QoS Protocol Layers Techn. 3 Physical Protocol Layers Techn. 4 Physical QoS Protocol Layers Techn. 2 ?

6. 6 QoS mechanisms in the infrastructure a b b a a C A B d A.a A.c C.b B.a c b c IP-link abstraction IP Network layer Layer two technologies IP IP Transport layer IP QoS: IntServ IP Application layer Physical ISSLL Ethernet Physical QoS Protocol Layers Techn. 3 Physical Protocol Layers Techn. 4 Physical QoS Protocol Layers Techn. 2

7. 7 Thesis: IntServ - Ethernet interworking Problem domain Achieving QoS across switched Ethernet by adhering to the Integrated Services over Specific Link Layers framework (ISSLL – RFC 2816) Goal Implement and evaluate the ISSLL framework over Ethernet Approach The validity of the total solution to be tested in a simulation model (OPNET, Ptolemy II, …) containing full vertical integration of the QoS solution.

8. 8 Contact persons @ Simula Research Lab Tor Skeie E-mail: tor.skeie@simula.notor.skeie@simula.no Phone: 67 82 83 87 Olav Lysne E-mail: olav.lysne@simula.noolav.lysne@simula.no Phone: 67 82 83 84

9. Correlation between network topology characteristics and performance Geir Horn

10. 10 Bisection bandwidth = 2 Diameter = 2

11. 11 Bisection Bandwidth = 3 Diameter = 2

12. 12 Thesis: Correlation of topology to performance Problem domain How does topological measures correlate with network performance? Goal Evaluate network performance given certain topological network parameters Approach Test the network performance in a simulation model (OPNET) and suggest better topological measures

13. 13 Contact persons @ Simula Research Lab Geir Horn E-mail: Geir.Horn@simula.no Phone: 93 05 93 35 Tor Skeie E-mail: tor.skeie@simula.notor.skeie@simula.no Phone: 67 82 83 87