SATNAC 2009 Conference Papers

Network Engineering

Title:                Automated Traffic Class Prediction and Prioritization on 802.11 Using Machine Learning


Authors:            Christiaan Brand (University of Stellenbosch), Riaan Wolhuter (University of Stellenbosch)


Abstract:           With the steady increase of Internet access rates (DSL, LTE, FTTH) and aging local access technologies (802.11) QoS problems are starting to manifest themselves on the inside of SOHo (Small Office / Home) networks. Bandwidth bottlenecks are slowly moving to the inside of our networks and we need a solution to solve this problem without investing in other access technologies. Substantial capital investment has been made into some of these (802.11 WiFi Access Points at airports and coffee shops) because of their availability in consumer computer equipment. Our solution should be able to solve the problems experienced when dealing with multiple traffic classes from the same node in a single cell. In this paper we will examine the impact of implementing a traffic class prediction module on a congested 802.11 network. A novel node prioritizing scheme for wireless networks operating in DCF mode will also be presented.


Title:                End-to-end QoS Control For an ALL-IP (NGN) Platform using WiMax as Access Layer Network


Authors:            Bessie Malila (University of Cape Town), Neco Ventura (University of Cape Town)


Abstract:           Telecommunications networks are evolving towards an integrated ALL-IP architecture, commonly known as the Next Generation Network (NGN). The architecture consists of Broadband transport technologies both on the access and  core networks. One of the problems in NGN architecture is the ability to guarantee end-to-end Quality of Service (QoS) provisioning to the integrated network services in the form of voice, video, data, fax and IPTV. These services present complex QoS requirements on the transport networks. In this paper we present an integration of the main components of a NGN on a test bed. We build an IP core network based on Linux routers and integrate it with an existing WiMax access network, an existing IP Multimedia Subsystem (IMS) network as the control layer component and a content server as an application layer entity. We further propose a mapping of QoS classes between the two networks to achieve end-to-end QoS guarantees. This project builds on previous and current research work in the Communications Research Group at the University of Cape Town. Link test have been used to check the link connectivity and link quality on the network. Future work will involve enabling QoS on the IP network so that the network is able to carry multimedia applications and implementation of the QoS mapping strategy between the two network domains.

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