Analysis of Quality of Service Mechanisms in IP and Road Networks

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Abstract

Nowadays, many infrastructures have to suffer from congestion problems due to a lack of capacity. The road infrastructure is a good example, but current telecommunications networks like the internet have to face the same problem. Quality of Service (QoS) is a concept in the internet, which has become more significant the last couple of years. QoS is the ability of a network element to have some level of assurance that its traffic and service requirements can be satisfied. Best-effort service is not able to satisfy such requirements. The road infrastructure seems to be a completely different infrastructure that can not be compared to an infrastructure like the internet. However, a closer study to both infrastructures reveals a lot of clear similarities. QoS mechanisms are already used or researched within both infrastructures. But the level of QoS seems to differ, especially in the field of guaranteed QoS, which is not yet attained in the road infrastructure. For this reason a proposal is made to introduce guaranteed QoS in the road infrastructure. This thesis starts with describing how QoS is, or could be defined in both infrastructures. The second part gives an overview of the several (QoS) mechanisms that are currently being applied or researched to cope with the mentioned congestion problems. The results are used to find correlations and to analyze which levels of QoS can be achieved with the current available concepts. Together with some knowledge of other infrastructures an important conclusion can be made; use of a reservation system seems to be inevitable to maintain Quality of Service, given capacity scarcity. The final chapter proposes an implementation of such a reservation system for the road infrastructure.

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