Evaluation of QoS in UMTS backbone network using differentiated services

Multicommodity-Based Delay Analysis for Heterogeneous Wireless Services in Core Network

“…Take 4-Tree topology shown in Fig. 1(a) as an example and assume that there are 12 flows traversing the net: (1,2), (1,3), (1,4), (2,1), (2,3, (2,4), (3,1), (3,2), (3,4), (4,1), (4,2), (4,3). Note the rate of commodity k as k R , k = 1, 2, ..., 12.…”

“…Ref. [3] evaluates QoS of services in UMTS (Universal Mobile Telecommunications System) backbone network by introducing a hybridized Diff-Serv and RVSP (Resource reservation Protocol) model through OPNET simulations, implying that Diff-Serv is available for UMTS bearer services. Ref.…”

“…However, the analysis in Ref. [3] and [4] are always carried out not only depending on the protocols and equipments in real networks but also by using professional softwares, while Ref. [5] just focuses on the aggregated domain, ignoring the roles that the others play in.…”

Analysing Quality of Service in UMTS

“…It is an upgrade from GSM via GPRS and EDGE. The standardization work for UMTS is carried out by Third Generation Partnership Project (3GPP) [3] [2].It aims at providing global roaming. It also inculcates various multimedia services for voice, data and video at increased data rates of 384 kbps while moving and 2 Mbps when stationary at specific locations.…”