01226nas a2200157   4500008004100000245008000041210006900121260001300190300001300203520064500216100002100861700002200882700001800904700001800922856012800940       2003                        eng d00aQoS and SLA aspects across multiple management domains: The SEQUIN approach0 aQoS and SLA aspects across multiple management domains The SEQUI  cFebruary  a 313-3263 aThe aim of this work is to define and implement an end-to-end approach to quality of service (QoS), operating across
multiple management domains and exploiting a combination of link layer technologies. The architecture for the Premium IP
service is presented, which aims at offering the equivalent of an end-to-end virtual leased line service at the IP layer across
multiple domains. Also, the results of the initial testing performed for the validation of the service and the provisioning
model for Premium IP are described. The work presented has been carried out in the framework of SEQUIN, a European
Commission-funded research project.1 aBouras, Christos1 aSevasti, Afroditi1 aCampanella, M1 aPrzybylski, M  uhttp://telematics.upatras.gr/telematics/publications/qos-and-sla-aspects-across-multiple-management-domains-sequin-approach01660nas a2200145   4500008004100000245006000041210005900101260001600160300001300176520116500189100002101354700002201375700001801397856009901415       2002                        eng d00aSLA definition for the provision of an EF-based service0 aSLA definition for the provision of an EFbased service  c14 - 16 May  a 17 - 213 aThe evolution of mechanisms for providing
Quality-of-Service (QoS) over the contemporary network
infrastructures has introduced the need for regulation and
management of the emerging QoS services with the use of
Service Level Agreements (SLAs). SLAs for QoS-enabled
networks move one step forward in the direction of
traditional ones, in the sense that they do not only have to
specify availability, security, quantity of allocated resources
and a number of other quantitative values but also have to
specify the values of appropriate quality parameters. This
paper deals with the particular cases of introduction of QoS
mechanisms to large transport networks according to the
DiffServ architecture. In these cases, the extensive level of
aggregation of flows and the connectionless nature of QoS
services’ provisioning makes the definition of QoS
parameters and the engineering of QoS metrics in the
traditional SLA specification a demanding task. Due to the
fact that strictly bounded deterministic guarantees are not
realistic, usually only upper bounds for the relevant
parameters can be defined and the corresponding SLAs have
to be defined accordingly.1 aBouras, Christos1 aSevasti, Afroditi1 aCampanella, M  uhttp://telematics.upatras.gr/telematics/publications/sla-definition-provision-ef-based-service