Dimensioning of the IP-based UMTS Radio Access Network with DiffServ QoS Support

Xi Li (University of Bremen) Wojciech Bigos (Nokia Siemens Networks Sp. z o.o.)
Carmelita Goerg (University of Bremen) Andreas Timm-Giel (University of Bremen)
Andreas Klug (Nokia Siemens Networks GmbH & Co. KG)

Dimensioning is an essential task of network engineering to provide
multi-service QoS guarantees without overprovision, i.e. to achieve efficient
bandwidth utilization while assuring the QoS requirements of different services.
This paper presents analytical models for dimensioning transport bandwidth
on the Iub interface in the IP-based UMTS Terrestrial Radio Access Network
(UTRAN), where the deployed QoS architecture is based on Differentiated Service
(DiffServ) using an integrated Weighted Fair Queue (WFQ) and Strict Priority
(SP) scheduling. The analytical models for the Iub bandwidth dimensioning
are validated by the simulations. The simulation results demonstrate that
the proposed analytical methods can appropriately estimate the application
performances of the different classes based on DiffServ QoS framework, hence
we can efficiently plan bandwidth capacity of the network links and promise
multiservice QoS provisioning in the UTRAN.