QoS in the different standardization bodies: 3GPP perspective (on wireless part)
Alain Sultan, ETSI
One of the key aspects of UMTS is its capacity to provide an efficient QoS for supporting a wide array
of applications, some of them unknown at the time of the definition of the system.
On the other hand, a basic assumption is that UMTS was to be built on the GSM system.
This presentation shows how this challenging exercise was performed, and how the GSM constraint
became less important on the four successive UMTS improvements (or “Releases”).
A quick overview of the system will show the duality of the problem with the Packet Switched versus
the Circuit Switched domains. Then the way the QoS is handled in each domain will be briefly
explained with a focus on the Packet Switched domain, where an analogy will be performed with the
fixed IP QoS problems and solutions.