QoS-Aware Routing in Future All-IP Access Networks

Student thesis: Doctoral ThesisDoctor of Philosophy


The proliferation of mobile devices over the past several years has created a
whole new world of the Internet. The deluge of applications for every aspect of
today’s life has raised the expectation of having ubiquitous connectivity, with
a desired Quality of Service (QoS). Although appealing, it has violated the
original Internet design which was not intended to support mobility, neither
better than best-effort delivery.
It is also a well-known fact that technology is an ever-advancing need of
the human society, and undeniably the Internet forms a major part of our lives
now. Everyday more and more users flood the Internet with enormous amount
of data and information. As such there is a need to effectively handle all the
information and traffic in a way that there is an availability of high speed
network routing without any loss in data transmission.
QoS provisioning has been one of the long lasting focuses in the network
research community. While designed for fixed networks, the use of QoS protocols
in IP-based mobile networks, where hosts dynamically change their point of
attachments, imposes new challenges to be studied and analysed. Furthermore,
a massive growth in the access network traffic with its highly unpredictable
nature can cause bottlenecks in some links while others are under-utilised,
rendering the load skewed, and therefore, breaching the QoS provisioning
The main objective of this research is to propose a novel QoS mechanism
for mobile networks. The new scheme is composed of two different approaches
accountable for QoS provisioning in next-generation access networks. Firstly, a
new method is proposed that minimises the signalling overhead, as well as the
interruption in QoS at the time of handover. Through a developed analytical
framework and simulation scenario, the performance of the new scheme is
investigated thoroughly, with the focus on the figures of merit that affect the
efficiency of using QoS signalling protocols in access networks.
Secondly, a new QoS-aware routing mechanism is proposed, based on the
OSPF protocol, intending to minimise the congestion on the links while at
the same time complying with traffic requirements. OSPF was created for
providing flexibility and great scalability, and although widely used today, does
not allow arbitrary splitting of traffic.
This research delves into the study and development of IP-based networking,
built upon an extension to OSPF routing protocol, that will foster integrated
functioning of technologies that currently lead the vision for the novel
telecommunication infrastructures and service provision. This novel QoS-aware
approach, Multi-Plane Routing (MPR), is applied in the context of access
networks for IP routing. MPR divides the physical network into several logical
routing planes, each being associated with a dedicated link weight configuration.
Network topology and node degree distribution directly impact the performance
of our strategy.
The foundation of this research’s vision for networking in future networks
is in the evolution and derivatives of IP routing that are inherited from the
native Internet and stand as the solution for networking in the sought "all-IP"
integrated modern telecommunications infrastructures. MPR is proposed to
offer a traffic engineering solution for future all-IP access networks that uses
QoS-awareness and policies for plane selection to maximise path diversity,
increase overall throughput and satisfy QoS requirements for sessions.
Date of Award2015
Original languageEnglish
Awarding Institution
  • King's College London
SupervisorAbdol-Hamid Aghvami (Supervisor) & Andrej Mihailovic (Supervisor)

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