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Title:QoS-aware Mobility Management in IP-based Communication Networks
Author:Dipl.-Ing. Alnasouri, Esam [Autor]
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Dateien vom 05.12.2012 / geändert 05.12.2012
URL for bookmark:http://www.db-thueringen.de/servlets/DocumentServlet?id=21451
URN (NBN):urn:nbn:de:gbv:ilm1-2012000342
Status:Document published
Contributors:Prof. Dr.-Ing. habil. Mitschele-Thiel, Andreas [Betreuer/Doktorvater]
Prof. Dr. rer. nat. habil. Seitz, Jochen [Gutachter]
PD Dr. rer. nat. Waldhorst, Oliver [Gutachter]
Keywords:QoS, Mobility Management, Mobile Communication Networks
Evaluationstyp:Für die Langzeitarchivierung vorgesehen
Dewey Decimal Classification:600 Technik, Medizin, angewandte Wissenschaften » 620 Ingenieurwissenschaften » 621 Angewandte Physik
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Descriptions:Zusammenfassung (dt.)

Ubiquitous access to information anywhere, anytime and anyhow is an important feature of future all-IP mobile communication networks, which will interconnect various systems and be more dynamic and flexible. The deployment of these networks, however, requires overcoming many challenges. One of the main challenges of interest for this work is how to provide Qual-ity of Service (QoS) guarantees in such highly dynamic mobile environments.As known, mobility of Mobile Nodes (MNs) affects the QoS in mobile networks since QoS parameters are made for end-to-end communications. Therefore, it is a challenge to develop new solutions capable of supporting seamless mobility while simultaneously providing QoS guarantees after handoffs. Addressing this challenge is the main objective of this dissertation, which provides a comprehensive overview of mobility management solutions and QoS mech-anisms in IP-based networks followed by an insight into how mobility management and QoS solutions can be coupled with each other. Following the highlight of the state of art along with the pros and cons of existing approaches, the dissertation concludes that hybrid strategies are promising and can be further developed to achieve solutions that are capable of simultaneous-ly supporting mobility and QoS, simple from the implementation point of view, efficient and applicable to future all-IP mobile communication networks.Based on this, the dissertation proposes a new hybrid proposal named QoS-aware Mobile IP Fast Authentication Protocol (QoMIFA). Our proposal integrates MIFA as a mobility man-agement protocol with RSVP as a QoS reservation protocol. MIFA is selected due to its capa-bility of the provision of fast, secure and robust handoffs, while RSVP is chosen because it presents the standard solution used to support QoS in existing IP-based networks. The hybrid architecture is retained by introducing a new object, called “mobility object”, to RSVP in or-der to encapsulate MIFA control messages.Following the specification of the new proposal, the dissertation also evaluates its perfor-mance compared to the well-known Simple QoS signaling protocol (Simple QoS) by means of simulation studies modeled using the Network Simulator 2 (NS2). The evaluation compris-es the investigation of the impact of network load and MN speed. The performance measures we are interested in studying comprise the resource reservation latency, number of dropped packets per handoff, number of packets sent as best-effort per handoff until the reservation is accomplished and probability of dropping sessions. Our simulation results show that QoMIFA is capable of achieving fast and smooth handoffs in addition to its capability of quickly re-serving resources after handoffs. Considering the impact of network load, QoMIFA outper-forms Simple QoS in all studied scenarios (low- , middle- and high-loaded scenarios). With respect to the impact of MN speed, it can be observed that the impact of ping-pong effects is seen with both protocols and results in higher resource reservation latency, more dropped packets per handoff and more best-effort packets per handoff at low speeds than at higher ones. The worst impact of ping-pong effects is seen at a speed of 3 km/h when employing QoMIFA and Simple QoS, respectively. However, QoMIFA remains performing significantly better than Simple QoS under all studied MN speeds and can even properly serve MNs mov-ing at high speeds.Following the simulative evaluation, the dissertation estimates the signaling cost of both stud-ied protocols with respect to the location update and packet delivery cost. Our results show that QoMIFA achieves the above mentioned performance improvements at the cost of greater location update cost and slightly higher packet delivery cost than Simple QoS.
Hochschule/Fachbereich:Technische Universität Ilmenau » Fakultät für Informatik und Automatisierung
Document created on: 05.12.2012
Files changed on: 08.02.2013
Date of doctoral thesis submission: 05.06.2012
Date of doctoral degree: 10.10.2012