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Identifier

000323142

Title

A contention-aware routing metric for multi-rate multi-radio wireless mesh networks

Alternative Title

Μια εξαρτώμενης συμφόρησης μετρική δρομολόγησης πάνω σε δίκτυα πολλαπλών διεπαφών και πολλαπλών ρυθμών μετάδοσης

Author

Γενετζάκης, Εμμανουήλ Γ

Thesis advisor

Σύρης, Βασίλειος

Abstract

With the rapid spread of wireless telecommunications technologies, mesh networks have emerged as a significant new technology that has experienced growing research and commercial interest. Having a variety of applications, wireless mesh networks have the potential to provide ubiquitous network access in urban and rural areas with low operation and management costs, to both fixed and mobile users. Routing is the process of selecting a path in the network along which to send data from one node to another and is one of the main operations that a network should support. Routing in mesh networks constitutes an important research area, because existing routing metrics are inadequate due to particular characteristics of such networks. In this thesis, we present a new routing metric for multi-rate multi-radio mesh networks, which takes into account both contention for the shared wireless channel and rate diversity in multi-radio multi-channel mesh networks. A key property of the proposed Contention Aware Transmission Time (CATT) metric is that it is isotonic, hence can be applied to link-state routing protocols. We have implemented the CATT metric in the OLSR routing protocol, and evaluate it in a test-bed with mesh nodes each equipped with four radio interfaces. Our experiments show that the proposed routing metric significantly outperforms other metrics that have appeared in the literature, in a number of scenarios that correspond to different mesh network topologies.

Physical description

xix, 66 σ. : εικ. ; 30 cm.

Language

Greek

Issue date

2008-04-11

Collection

School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses

Type of Work--Post-graduate theses

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556

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