SATNAC 2007 Conference Papers

Network Management & OSS

Title:                   Towards Optimized QoS Based –Charging Model

Authors:              Wissam Eltarjaman (Higher Institute of Industry, Libya),
Majdi Ashibani (Higher Institute of Industry), Bashir El-Jabu (Higher Institute of Industry)

Abstract:             This paper proposes a pricing model for Differentiated Services (DiffServ) network. The service differentiation is modeled according to the guaranteed QoS level for each class. This model assumes that a user selects an appropriate class of service depending on his QoS requirements. The users access to the service is assumed as bursty traffic, and all the users are competing on one shared bandwidth. The equivalent guaranteed capacity of a class is calculated according to its guaranteed QoS level. A fixed price is given for each class for certain guaranteed capacity. Then, an analysis for the service provider to achieve maximum value of revenues is made by determining the total required shared bandwidth, the service class optimum guaranteed capacity and its optimum price.


Title:                    A Geopolitical Analysis of long term Internet Network Telescope Traffic

Authors:              Barry Irwin (Rhodes University),
Nick Pilkington (Rhodes University, Richard Barnett (Rhodes University), Blake Friedman (Rhodes University)

Abstract:             This paper presents results form the analysis of twelve months of network telescope traffic spanning 2005 and 2006, and details some of the tools developed. The most significant results of the analysis are highlighted. In particular the bulk of traffic analysed had its source in the China from a volume perspective, but Eastern United States, and North Western Europe were shown to be primary sources when the number of unique hosts were considered. Traffic from African states (South Africa in particular) was also found to be surprisingly high. This unexpected result may be due to the network locality preference of many automated agents. Both statistical and graphical analysis are presented. It is found that a country with a high penetration of broadband connectivity is likley to feature highly in Network telescope traffic, as are networks logically close to the telescope network.


Title:                    Immediate Detection of Anomalies in Call Data - An Adaptive Intelligence Approach

Authors:              Isaac Olusegun Osunmakinde (University of Cape Town),
Anet Potgieter (University of Cape Town) 

Abstract:             Anomaly detection in telecommunications call data tries to discover deviant behaviour of individual subscribers. Malicious behaviour has been noted as one of the key causes of such anomalies, which have consequently led to unquantifiable losses of revenue to many telecommunication networks world-wide. Although the intentions of most subscribers to these networks are unknown when making phone calls, their behaviour pattern is reflected in their call data. Recent studies have investigated the challenges of anomaly detection but have not given conclusive solutions to address this problem. To maximize the true positive rates and minimize false detection at an acceptable level, this paper presents the Telecommunications Anomaly Detection System (TADS) which efficiently facilitates immediate detection that will help call analysts and managers with adaptive decisionmaking. We developed and implemented the TADS which uses Behavioural Bayesian Networks (BBNs) to address this challenge. The empirical evaluation results obtained using real world land-line call data for subscribers of a local Telecommunication Services Provider (TSP) demonstrated that the TADS can detect and act upon anomalies in telecommunication networks as it happens.


Title:                   ** A Service Oriented Architecture guided by the NGOSS

Authors:              Willem H.A. Senekal (Telkom SA),
Alexander J. Graaff (Telkom SA), John J. Davis  (Telkom SA)

Abstract:              The ever increasing demand of customers for better and faster delivery of services contributes to the high rate of change within the telecommunications industry to meet these demands. Telecommunication operators need to rapidly react to these customer demands. In this paper a brief overview is given on the New Generation Operations Systems and Software (NGOSS) framework and Service Oriented Architecture (SOA) principles to assist principles to assist a telecommunications operator in a dynamic environment. A case study based on SOA principles and guided by the NGOSS is also discussed.


Title:                   Implementation of an Internet Access Cost Management System for Disadvantaged Communities

Authors:              Paul Tarwireyi (University of Fort Hare),
Alfredo Terzoli (University of Fort Hare), Mamello Thinyane (University of Fort Hare)

Abstract:             Rural Internet connectivity projects aimed at bridging the digital divide have sprouted up across many developing countries. After the initial deployment, economic sustainability remains one of the greatest challenges facing these projects. This paper presents the design and initial implementation of an Internet Cost Management System that will enable the exploration of suitable pricing models to generate revenue to make the infrastructure economically sustainable. An important goal of the exploration is the establishment of what would be regarded as equitable cost sharing in rural, marginalized communities in South Africa, such as the community in Dwesa on the Wild Coast.


Title:                   Design Considerations for a Visual-Based Interfacing Device for Telco Operation

Authors:              Willem Visser (University of Johannesburg),
Yuko Roodt (Highquest), Willem Clarke (University of Johannesburg)

Abstract:             The parts of the system in the telecommunication environment that is used by technicians are sometimes completely menu driven. The interfaces to these parts can be made much simpler. Visual-based interfacing is a relatively new field of interest with advancements being made toward marker free human input tracking. This paper investigates the issues regarding the design of one such a system. Specifically, it looks at the factors concerning the telecommunication environment as well as factors concerning the setup of the camera being used to capture the user’s input. It also investigates how shadows being cast by the user’s hand against the background, could affect the detection of user input.


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