INDEX
| Raweb 2003 / Project-Team : reso
|
HELP INDEX |
|
Key words: DiffServ, Network Quality of Service, Alternative DiffServ, Packet Scheduling Algorithm, EDS.
Contributed by: Benjamin Gaidioz, Mathieu Goutelle, Pierre Billiau, François Echantillac, Pascale Vicat-Blanc Primet.Alternative approach of IP service differentiation that aims, by a specific router scheduling and file management mechanisms, at differentiating packets forwarding with a trade-off between loss rate and latency
This research on Service differentiation is conducted in the context of the National RNRT VTHD++ project, the national RNTL eToile project, the European DataGRID project and the European DataTAG project
Flows crossing the IP networks are not equally sensitive to loss or delay variations. Since several years, research effort has been spent to solve the problem of the heterogeneous performance needs of the IP traffic. A class of solutions considers that the IP layer should provide more sophisticated services than the simple best-effort service to meet the application's quality of service requirements. Different proposals for improving the IP stack, like the DiffServ architecture, have been proposed but still exhibits three types of limitations we are considering:
the end to end performances that the DiffServ standardized services offer have not been largely studied in real networks;
when experiment shows that end to end connection can benefit from advanced DiffServ QoS network functionalities, their usage by individual flows is not straightforward;
the deployment of DiffServ architecture presents different scaling problems. Alternative approaches are proposed to solve this issue.
|
|
|