The use of broadband mesh networks to support advanced applications for intelligent transportation systems (Greece-Australia)

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Projects - International Projects




€ 60,000

Short Description

Although single hop WiMax provides high flexibility to attain Quality of Service (QoS) for advanced applications, in terms of data throughput, achieving the same in multi-hop WiMax mesh is very challenging. More specifically, as usually happens in these cases, the standard does not describe specific mechanisms and techniques for many operations crucial to a real WiMax mesh network, leaving them as implementation differentiators. Two of the most important such operations are i) the network connectivity support at the network layer and ii) the resource allocation mechanism at the medium access control (MAC) layer. Network connectivity includes the mechanisms that ensure safe and efficient flow of data. Its major component is the routing mechanism for the selection and maintenance of the most appropriate path(s) for the communication between two or more wireless nodes. The resource allocation mechanism on the other hand, is responsible for coordinating transmission on the wireless medium, when more than one interfering nodes have to transmit at the same time. Especially when advanced, highly demanding applications are involved (e.g., voice, videoconference, etc.), both these mechanisms have to be able to ensure the anticipated QoS, by providing differentiated treatment to different kinds of traffic, based on a specific set of traffic and QoS parameters. Another major requirement is the tight coordination of the two mechanisms, through information exchange between the two layers, that leads to an integrated end-to-end QoS provision architecture for WiMax mesh networks. The aim of this project  was to study the problem of the support of advanced applications in WiMax mesh networks and propose an overall architecture, including coordinated network connectivity and resource allocation mechanisms, for end-to-end QoS provision.