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The defense date of the thesis is 2005-04-29
The current date is 2018-06-23
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URN etd-0429105-090102 Statistics This thesis had been viewed 2442 times. Download 20 times. Author Meng-Feng Tu Author's Email Address email@example.com Department Communication Engineering Year 2004 Semester 1 Degree Master Type of Document Master's Thesis Language English Page Count 39 Title The QoS Study of UMTS Core Networks Using Differentiated Services Keyword QoS DiffServ DiffServ QoS Abstract ENGLISH ABSTRACT
There are four different QoS (Quality of Service) classes for UMTS：conversational class、streaming class、interactive class and background class. To meet the different service requirement, the QoS mechanisms provided in the cellular network have to be robust and capable of providing reasonable QoS resolution. Differentiated Services, or DiffServ, is an IP QoS architecture based on packet marking that allows packets to be prioritized according to user requirements. The DiffServ architecture provides QoS by dividing traffic into different classes, marking each packet with a code point that indicates its category, and scheduling packets accordingly.
In this thesis we simulate Best-Effort network and DiffServ network for four classes of UMTS traffic by NS-2 simulator and evaluate the performance of each service class. It shows that the adoption of DiffServ architecture can improve the QoS of network.
Advisor Committee Chienhua Chen - advisor
Jin-Cherng Lin - co-chair
none - co-chair
Files Date of Defense 2005-01-31 Date of Submission 2005-04-29