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Title: Lightweight Mechanisms for Quality of Service Management in Differentiated Services Networks
Author: Kulkarni, Parag Gopal
ISNI:       0000 0001 3602 845X
Awarding Body: University of Ulster
Current Institution: Ulster University
Date of Award: 2007
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Ever since applications requiring different types of service (e.g. low loss, high throughput, low delay/jitter etc.) emerged, there has been a need to support service differentiation Le. differentiation based on the Quality of Service (QoS). Two key solutions to the QoS problem have emerged - Integrated Services (IntServ), which provide fine grained QoS on a per flow basis and Differentiated Services (DiffSelv), which provide coarse grained QoS on a traffic aggregate basis. DiffServ seems to be winning the battle so far because it is simple and scalable. In the DiffServ architecture, the edge routers measure traffic for each Service Level Agreement (SLA) and classify it (traffic classified by the edge router will henceforth be referred to as DS marked) into one of the service classes. The core routers on the other hand, on receipt of a DS marked packet, forward it onto the next hop according to a 'Per Hop Behaviour' (PHB) where a PHB corresponds to a traffic class. Even though the IETF DiffServ \Vorking Group has standardized a few PHBs such as the Expedited Forwarding (EF) PHB and Assured Forwarding (AF) PHB, it has not mandated any specific mechanisms to realize these. This thesis proposes lightweight mechanisms to address the requirements within these two PHBs.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available