University of Cape Town

Displaying 1-40 of 58 results

  • White Papers // Oct 2011

    An Efficient Connection Admission Control (CAC) for QoS Provisioning in IEEE 802.16

    Service differentiation and QoS support are important aspects of Connection Admission Control (CAC) in IEEE 802.16 networks, which is left for vendors to design and implement for efficient resource utilization. In this paper, a bandwidth based Dynamic control Threshold (DT) is proposed for the connection types of IEEE 802.16 networks....

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Multi-Radio Access Selection to Reduce Reorder Buffer Requirements in Heterogeneous Wireless Networks With Multi-Homed Mobile Terminals

    Aggregating bandwidth from multiple Radio Access Technologies (RATs) provides an opportunity for network providers to enhance network capacity. This is important for serving applications that require more bandwidth than a single RAT can offer. One of the important elements of bandwidth aggregation is the selection of a suitable set of...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    LTSP DNS Round Robin Clusters: Green Technology Access Enablers for Telecommunication Services in Marginalised Communities

    Rural development is seen as a priority in South Africa; information and knowledge are key strategic resources for social and economic development. Information Communication Technologies (ICTs) are seen as important tools in rural development, assisting in enabling change through economic development. In rural areas where ICT infrastructure is being expanded...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Enhanced Distributed Mobility Management Schemes for NGWNs

    The IETF IP working group is working on the solutions to address the deployment of current IP mobility management in a distributed and dynamic mobility management approach. The paper is aimed at addressing the limitations that arise when the current IP mobility management schemes are used, considering the increasing data...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Downlink Packet Scheduling for Variable Bitrate Traffic in LTE Networks

    In recent years, there has been a sharp increase in the demand for real-time multimedia applications from mobile subscribers. Voice and video are the most common forms of network traffic used in these applications and to optimise space-quality ratios, variable bitrate coding techniques are used to encode them. Even with...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Investigating a Reduced Size Real-Time Transport Protocol for Low-Bandwidth Networks

    Optimization of bandwidth usage for video streaming is of paramount importance in networks where low bitrate links are typical. Among the solutions proposed to address this problem is header compression. Real-Time Transport Protocol (RTP) and RTP Control Protocol (RTCP) are the major protocols responsible for the delivery of real-time media....

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Real-Time Performance Evaluation of Media Pipeline Plug-In Architectures

    Deployment of real-time applications has become ubiquitous in recent years. These applications (e.g. streaming video over the Internet) however, are processor-intensive and require fast video-processing techniques for more flexible, efficient operation. Media pipeline plug-in architectures have been introduced to provide these capabilities in form of extensible, integrated frameworks. Several architectures...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    A Highly Scalable Monitoring Tool for Wi-Fi Networks

    The paper introduces a monitoring tool that was designed for an existing network of Wi-Fi hotspots. This was done by adding data collection and visualization components to the existing network. Syslog protocol was used for data collection and left running for two months monitoring network's performance. Google Maps was used...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    A Real-Time Charging Platform for Converged Multimedia Services

    Network operators can achieve rapid service proliferation by exposing their networks to external content and service providers. The authors would create interfaces that would allow these service and content providers to offer their applications and services to users. Composing and bundling of these services will essentially create new services for...

    Provided By University of Cape Town

  • White Papers // May 2011

    Fast Implementation of Block Motion Estimation Algorithms in Video Encoders

    Block Matching Algorithms (BMA) are central to optimal frame prediction for motion estimation in video compression. This paper focuses on the efficiency of Hierarchical Search (HS) algorithms. The research proposed two new combinations of fast algorithms like Small Diamond shaped Search Pattern (SDSP) and Square-Shaped Search Pattern (SSSP) with a...

    Provided By University of Cape Town

  • White Papers // Mar 2011

    South African Mining Equipment And Related Services: Growth, Constraints And Policy

    Like many other developing economy regions, Africa is benefitting from a sustained boom in commodities prices. Received wisdom has been that commodities production is an inherently enclave activity and that it undermines the viability of industry. The Making the Most of Commodities Programme challenges this negative view of the commodities...

    Provided By University of Cape Town

  • White Papers // Jan 2011

    Call Admission Control With Pricing to Ensure Revenue for Network Operators While Providing QoS in Heterogeneous Networks

    Heterogeneous networks are the next generation of wireless networks. They are envisioned to offer high data rates and multimedia services. Additionally, they are intended to offer services to users regardless of the access technology. Provision of multimedia services to users will result in high demand for radio resources, which are...

    Provided By University of Cape Town

  • White Papers // Dec 2010

    Micro, Small and Medium Enterprises' Activities, Income Level and Poverty Reduction in Ghana - A Synthesis of Related Literature

    The paper reviews the literature on the importance of MSMEs to economic development and poverty alleviation. Two divergent views of MSMEs, the pro-MSMEs and the anti-MSMEs, have been identified in the literature. Whereas the pro-MSMEs believe in the significant role played by small business in the economic prosperity of a...

    Provided By University of Cape Town

  • White Papers // Oct 2010

    Evaluation of Interference in Inter-Working Multi-Hop Wireless Networks

    The consequence of simultaneous transmissions by nodes in inter-working multi-hop wireless networks is inter-node interference. Inter-node interference is a metric that is important for the performance evaluation of inter-working wireless networks. Several interference models exist in literature, however, these models are for specific wireless networks and MAC protocols. Due to...

    Provided By University of Cape Town

  • White Papers // Sep 2010

    Exchange Rate Determination Under Monetary Policy Rules In A Financially Underdeveloped Economy: A Simple Model And Application to Mozambique

    Microstructure aspects of nominal exchange rate determination are less relevant in countries with embryonic financial markets. In less-developed economies, trade in goods and services is a more significant driver of currency demand than financial market speculation or hedging; and central banks actively set monetary variables. The authors develop a simple...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    A Context-Oriented Service Brokering Platform for the IP Multimedia Subsystem

    The rise of Web 2.0 applications has led to the need for the evolution of the Telecommunications business model. In this paper, the authors have proposed a context-oriented Service Brokering Platform for the IP Multimedia Subsystem. The proposed SBP framework will allow Telecoms operators to leverage existing services for use...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Charging in IP Multimedia Networks

    IMS charging can be performed at various planes of the IMS architecture. Different charging schemes may be utilized. The optimal charging scheme would be service dependent, but may also be influenced by user expectations. The 3GPP has standardized charging mechanisms, protocols and interfaces for IMS charging control; online and offline...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Joint Source-Network-Channel Coding for Multimedia Communications

    In this paper, a joint optimisation of source, channel and network coding is designed using network coding approach. This is necessary for optimal allocation of network resources at different layers. The proposed scheme is applied to satellite network and examined for bandwidth optimality. Simulation results have shown how information exchanges...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    A Converged IMS Client for the IP Multimedia Subsystem

    The IP Multimedia Subsystem (IMS) has been developed to provide a single platform that offers many different converged services, over multiple access technologies, with several different end user terminals. It aims to unify the current disjoint point solutions offered by network operators, with the goal of reducing CAP-EX (CAPital EXpenditure),...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    A Hybrid Network/Host Mobility Management Scheme for NGNs

    Next Generation Networks are becoming more and more converged. Like the System Architecture Evolution (SAE) which encourages Fixed Mobile Convergence. It is a packet switched network which connects different radio access technologies. With this heterogeneity, mobility management becomes an issue as the goal is to always achieve seamless mobility. However,...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Modelling Channel Error in IEEE 802.11 Networks

    Modeling the performance of IEEE 802.11 networks has been done since the standard first appeared. Most of the models assume saturated traffic conditions and do not distinguish between traffic classes and above all, assume the wireless link to be error-free. Without making any of these assumptions, in this paper the...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Analysis of Network Operators' Revenue With a Dynamic Pricing Model Based on User Behavior in NGWN Using JCAC

    Next generation of wireless networks are expected to be heterogeneous, whereby multiple radio access technologies will work together in a coordinated fashion. These networks will be required to accommodate different types of users with different QoS requirements. Effective Joint Call Admission Control (JCAC) algorithms are a prerequisite in NGWN to...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Towards Improved TCP-Friendly Rate Adaptation for Real-Time Applications Using Adaptive Filters

    The emergence of multimedia applications has spurred interest in transport protocols with flexible transmission control. In TCP-Friendly Rate Control (TFRC), the multimedia transmission rate is adapted using the TCP throughput equation. This model, defined in terms of the relationship between throughput, round-trip time and loss rate, ensures that the resulting...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    TransferHTTP+CAS: Latency and Memory Tests

    Convergence in the Internet, Telecommunication and Broadcasting is generating new services over the Internet. The online experience is getting improved via the introduction of user profile mobility and HTTP session mobility. While the academia has proposed different architectural schemes - client, proxy and server - for HTTP session mobility, the...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Improvement of FMIPv6 Handover Performance Using MIH and Timely Link Layer Triggers

    The Mobile IPv6 for Fast Handovers (FMIPv6) solution aims at reducing the handover latency and packet loss experienced in MIPv6. It achieves this reduction by applying fast movement detection and fast binding update procedures. However, handover latency in this FMIPv6 solution is still not sufficient for active ongoing real-time and...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Scalable Video Streaming Server for Mobile WiMAX

    The advancements in high-speed networks and video technology have made it technologically and economically feasible to provide video streaming. Among existing wireless standards, WiMAX provides high-data rates and long-range coverage. However, the quality of video streaming over mobile WiMAX networks can drastically be degraded by varying network conditions such as...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Efficient Multicasting for Conferences Using MANETs

    This paper mainly presents a motivation for research to be done on multicast protocols for Mobile Ad hoc NETworks (MANETs). In particular, the paper argues why the existing multicast protocols are too robust and less efficient to serve workshop (or conference) related environments. A new multicast routing protocol called a...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Admission Control and Packet Scheduling for IEEE 802.16 Standards

    Admission control and packet scheduling mechanisms are used in service differentiation and QoS support. Implementation of these mechanisms in IEEE 802.16 is vendor specific. This paper states the problems and proposes solutions for admission control and packet scheduling in IEEE 802.16 networks. The proposed algorithms will enhance bandwidth utilization and...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Sensor Network Discovery for Deep Mining

    AziSA is an architecture for open measurement defined by the CSIR. It makes use of Wireless Sensor Networks (WSN) to provide a mechanism of recording data from drill and blast mining environments. This paper focuses on developing a sensor discovery method that is custom to the AziSA architecture. The method...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Real-Time Bandwidth Encapsulation for IP/MPLS Protection Switching

    MPLS fast reroute achieves fast protection switching times ideal for the recovery of real-time multimedia traffic. The paper proposes to guarantee real-time protection of multimedia traffic by adapting the Russian Dolls Bandwidth Constraints Model to allocate bandwidth to multimedia traffic. The Quality of Protection (QoP) parameters that will be investigated...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Mobile Cloud Computing: Embracing Network as a Service

    The recent emergence of Cloud Computing in the IT world has brought much hype and opened doors for new revenue streams and business models. The movement towards an all IP-based communication system has led to the IMS being accepted as the Next Generation Network (NGN) service control provisioning platform. The...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Contradictions in Power Loading and Pilot Patterns in NC-OFDM Cognitive Radio Systems

    Cognitive Radio (CR) is seen as the next paradigm in radio communications and as a practical solution to the problem of spectrum scarcity. Non-Contiguous Orthogonal Frequency-Division Multiplexing (NC-OFDM) is a proposed implementation which allows the use of frequency bands to be placed arbitrarily close while maintaining the ability to disable...

    Provided By University of Cape Town

  • White Papers // May 2010

    A Framework to Provide Charging for Composite Services

    Changing telecommunications market trends calls for the evolution of service creation and delivery by network operators. They need to maximize on any available form of revenue creation to avoid becoming "Bit-pipes" and can achieve this by creating interfaces for 3rd party service and content providers to offer applications and services...

    Provided By University of Cape Town

  • White Papers // Mar 2010

    The Composition Of Foreign Capital Stocks In South Africa: The Role Of Institutions, Domestic Risk And Neighbourhood Effects

    This paper investigates the determinants of the absolute volumes and composition of foreign capital stocks in South Africa, focusing on the role played by institutional quality (property rights), domestic risk and neighborhood effects as potential determinants. The empirical findings show that secure property rights and low risk in the host...

    Provided By University of Cape Town

  • White Papers // Mar 2010

    Large Scale Metadata Harvesting Over Low Bandwidth Connections

    There seems to be a widespread perception that large scale metadata harvesting requires a large amount of bandwidth. In this paper, a simple Python-based metadata harvester was created and run over a residential broadband connection. Results show that it is possible to build a metadata collection in the order of...

    Provided By University of Cape Town

  • White Papers // Feb 2010

    Measuring Institutions: Indicators Of Political Rights, Property Rights And Political Instability In Malawi

    This paper aims to construct a new set of institutional indicators for Malawi. This political freedom index correlates strongly with the Freedom House political rights and civil liberties indices, but consists of a far longer time series, which can be used to examine long-run issues with greater efficacy. The high...

    Provided By University of Cape Town

  • White Papers // Jan 2010

    Telemedicine Using VoIP Combined With a Store and Forward Approach

    Rural areas in South Africa have unique conditions such as remoteness and scarcity of reliable public facilities. Information and Communication Technologies (ICTs) introduced into these areas must be suitable for these conditions. Using a user-centred design approach based on Participatory Design and Action Research, the paper has developed a telemedicine...

    Provided By University of Cape Town

  • White Papers // Sep 2009

    Relationship Or Innovation Orientation In B2B Markets: Empirical Results From An Emerging Market

    Market orientation and innovation orientation, including their relationship with firm performance, are well-debated in prevailing marketing literature. Interestingly, relationship orientation, as an extension of market orientation, is yet to be subjected to similar investigation. While relationship orientation suggests that firms should invest in building relationships with clients and suppliers to...

    Provided By University of Cape Town

  • White Papers // Aug 2009

    Foreign Direct Investment In Zimbabwe: The Role Of Institutional Factors

    The purpose of the paper is to examine the impact of property rights on Foreign Direct Investment (FDI) in Zimbabwe for the period 1964-2005. While the macroeconomic determinants of FDI have been analyzed to a considerable extent in past empirical work, the role of institutional factors such as the protection...

    Provided By University of Cape Town

  • White Papers // Jul 2009

    Linear Detector Performance in Ill-Conditioned MIMO OFDM Channels

    This paper investigates the performance of linear detector based receivers in MIMO OFDM systems. Two linear detectors are compared that is: Zero Forcing (ZF) and the Minimum Mean Square Error (MMSE). The introduction of interference cancellation will be shown to greatly improve linear detector Bit Error Rates (BER). The performance...

    Provided By University of Cape Town

  • White Papers // May 2011

    Fast Implementation of Block Motion Estimation Algorithms in Video Encoders

    Block Matching Algorithms (BMA) are central to optimal frame prediction for motion estimation in video compression. This paper focuses on the efficiency of Hierarchical Search (HS) algorithms. The research proposed two new combinations of fast algorithms like Small Diamond shaped Search Pattern (SDSP) and Square-Shaped Search Pattern (SSSP) with a...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Real-Time Performance Evaluation of Media Pipeline Plug-In Architectures

    Deployment of real-time applications has become ubiquitous in recent years. These applications (e.g. streaming video over the Internet) however, are processor-intensive and require fast video-processing techniques for more flexible, efficient operation. Media pipeline plug-in architectures have been introduced to provide these capabilities in form of extensible, integrated frameworks. Several architectures...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Investigating a Reduced Size Real-Time Transport Protocol for Low-Bandwidth Networks

    Optimization of bandwidth usage for video streaming is of paramount importance in networks where low bitrate links are typical. Among the solutions proposed to address this problem is header compression. Real-Time Transport Protocol (RTP) and RTP Control Protocol (RTCP) are the major protocols responsible for the delivery of real-time media....

    Provided By University of Cape Town

  • White Papers // May 2010

    A Framework to Provide Charging for Composite Services

    Changing telecommunications market trends calls for the evolution of service creation and delivery by network operators. They need to maximize on any available form of revenue creation to avoid becoming "Bit-pipes" and can achieve this by creating interfaces for 3rd party service and content providers to offer applications and services...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Improvement of FMIPv6 Handover Performance Using MIH and Timely Link Layer Triggers

    The Mobile IPv6 for Fast Handovers (FMIPv6) solution aims at reducing the handover latency and packet loss experienced in MIPv6. It achieves this reduction by applying fast movement detection and fast binding update procedures. However, handover latency in this FMIPv6 solution is still not sufficient for active ongoing real-time and...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    TransferHTTP+CAS: Latency and Memory Tests

    Convergence in the Internet, Telecommunication and Broadcasting is generating new services over the Internet. The online experience is getting improved via the introduction of user profile mobility and HTTP session mobility. While the academia has proposed different architectural schemes - client, proxy and server - for HTTP session mobility, the...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Charging in IP Multimedia Networks

    IMS charging can be performed at various planes of the IMS architecture. Different charging schemes may be utilized. The optimal charging scheme would be service dependent, but may also be influenced by user expectations. The 3GPP has standardized charging mechanisms, protocols and interfaces for IMS charging control; online and offline...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    A Converged IMS Client for the IP Multimedia Subsystem

    The IP Multimedia Subsystem (IMS) has been developed to provide a single platform that offers many different converged services, over multiple access technologies, with several different end user terminals. It aims to unify the current disjoint point solutions offered by network operators, with the goal of reducing CAP-EX (CAPital EXpenditure),...

    Provided By University of Cape Town

  • White Papers // Mar 2010

    Large Scale Metadata Harvesting Over Low Bandwidth Connections

    There seems to be a widespread perception that large scale metadata harvesting requires a large amount of bandwidth. In this paper, a simple Python-based metadata harvester was created and run over a residential broadband connection. Results show that it is possible to build a metadata collection in the order of...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Joint Source-Network-Channel Coding for Multimedia Communications

    In this paper, a joint optimisation of source, channel and network coding is designed using network coding approach. This is necessary for optimal allocation of network resources at different layers. The proposed scheme is applied to satellite network and examined for bandwidth optimality. Simulation results have shown how information exchanges...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Towards Improved TCP-Friendly Rate Adaptation for Real-Time Applications Using Adaptive Filters

    The emergence of multimedia applications has spurred interest in transport protocols with flexible transmission control. In TCP-Friendly Rate Control (TFRC), the multimedia transmission rate is adapted using the TCP throughput equation. This model, defined in terms of the relationship between throughput, round-trip time and loss rate, ensures that the resulting...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    A Hybrid Network/Host Mobility Management Scheme for NGNs

    Next Generation Networks are becoming more and more converged. Like the System Architecture Evolution (SAE) which encourages Fixed Mobile Convergence. It is a packet switched network which connects different radio access technologies. With this heterogeneity, mobility management becomes an issue as the goal is to always achieve seamless mobility. However,...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Efficient Multicasting for Conferences Using MANETs

    This paper mainly presents a motivation for research to be done on multicast protocols for Mobile Ad hoc NETworks (MANETs). In particular, the paper argues why the existing multicast protocols are too robust and less efficient to serve workshop (or conference) related environments. A new multicast routing protocol called a...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Admission Control and Packet Scheduling for IEEE 802.16 Standards

    Admission control and packet scheduling mechanisms are used in service differentiation and QoS support. Implementation of these mechanisms in IEEE 802.16 is vendor specific. This paper states the problems and proposes solutions for admission control and packet scheduling in IEEE 802.16 networks. The proposed algorithms will enhance bandwidth utilization and...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Contradictions in Power Loading and Pilot Patterns in NC-OFDM Cognitive Radio Systems

    Cognitive Radio (CR) is seen as the next paradigm in radio communications and as a practical solution to the problem of spectrum scarcity. Non-Contiguous Orthogonal Frequency-Division Multiplexing (NC-OFDM) is a proposed implementation which allows the use of frequency bands to be placed arbitrarily close while maintaining the ability to disable...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Scalable Video Streaming Server for Mobile WiMAX

    The advancements in high-speed networks and video technology have made it technologically and economically feasible to provide video streaming. Among existing wireless standards, WiMAX provides high-data rates and long-range coverage. However, the quality of video streaming over mobile WiMAX networks can drastically be degraded by varying network conditions such as...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Sensor Network Discovery for Deep Mining

    AziSA is an architecture for open measurement defined by the CSIR. It makes use of Wireless Sensor Networks (WSN) to provide a mechanism of recording data from drill and blast mining environments. This paper focuses on developing a sensor discovery method that is custom to the AziSA architecture. The method...

    Provided By University of Cape Town

  • White Papers // Apr 2009

    Link and Route Availability for Inter-working Multi-hop Wireless Networks

    In inter-working multi-hop wireless networks, establishing resilient connectivity between source-destination node pairs is a major issue. The issues of connectivity in multi-hop wireless networks have been studied. However these analyzes focused on network connectivity in ad-hoc networks. Since the next generation of wireless networks will be inter-working, an understanding of...

    Provided By University of Cape Town

  • White Papers // Jun 2009

    Analysis of Route Availability in Inter-working Multi-hop Wireless Networks

    In order to link a source-destination node pair in inter-working multi-hop wireless networks, links or routes must first be available. It is only after establishing the availability of links and routes between nodes that factors which affect connectivity e.g. interference can be considered. Connectivity in multi-hop wireless networks has been...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Real-Time Bandwidth Encapsulation for IP/MPLS Protection Switching

    MPLS fast reroute achieves fast protection switching times ideal for the recovery of real-time multimedia traffic. The paper proposes to guarantee real-time protection of multimedia traffic by adapting the Russian Dolls Bandwidth Constraints Model to allocate bandwidth to multimedia traffic. The Quality of Protection (QoP) parameters that will be investigated...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    A Highly Scalable Monitoring Tool for Wi-Fi Networks

    The paper introduces a monitoring tool that was designed for an existing network of Wi-Fi hotspots. This was done by adding data collection and visualization components to the existing network. Syslog protocol was used for data collection and left running for two months monitoring network's performance. Google Maps was used...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    A Real-Time Charging Platform for Converged Multimedia Services

    Network operators can achieve rapid service proliferation by exposing their networks to external content and service providers. The authors would create interfaces that would allow these service and content providers to offer their applications and services to users. Composing and bundling of these services will essentially create new services for...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Enhanced Distributed Mobility Management Schemes for NGWNs

    The IETF IP working group is working on the solutions to address the deployment of current IP mobility management in a distributed and dynamic mobility management approach. The paper is aimed at addressing the limitations that arise when the current IP mobility management schemes are used, considering the increasing data...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Downlink Packet Scheduling for Variable Bitrate Traffic in LTE Networks

    In recent years, there has been a sharp increase in the demand for real-time multimedia applications from mobile subscribers. Voice and video are the most common forms of network traffic used in these applications and to optimise space-quality ratios, variable bitrate coding techniques are used to encode them. Even with...

    Provided By University of Cape Town

  • White Papers // Oct 2011

    An Efficient Connection Admission Control (CAC) for QoS Provisioning in IEEE 802.16

    Service differentiation and QoS support are important aspects of Connection Admission Control (CAC) in IEEE 802.16 networks, which is left for vendors to design and implement for efficient resource utilization. In this paper, a bandwidth based Dynamic control Threshold (DT) is proposed for the connection types of IEEE 802.16 networks....

    Provided By University of Cape Town

  • White Papers // Aug 2011

    Multi-Radio Access Selection to Reduce Reorder Buffer Requirements in Heterogeneous Wireless Networks With Multi-Homed Mobile Terminals

    Aggregating bandwidth from multiple Radio Access Technologies (RATs) provides an opportunity for network providers to enhance network capacity. This is important for serving applications that require more bandwidth than a single RAT can offer. One of the important elements of bandwidth aggregation is the selection of a suitable set of...

    Provided By University of Cape Town

  • White Papers // Aug 2011

    LTSP DNS Round Robin Clusters: Green Technology Access Enablers for Telecommunication Services in Marginalised Communities

    Rural development is seen as a priority in South Africa; information and knowledge are key strategic resources for social and economic development. Information Communication Technologies (ICTs) are seen as important tools in rural development, assisting in enabling change through economic development. In rural areas where ICT infrastructure is being expanded...

    Provided By University of Cape Town

  • Case Studies // Nov 2008

    Case Study 7 Interactive Spreadsheets

    This case study speaks about the perceptions of students about Statistics. The subject is generally considered difficult and intensive by the students. The paper seeks to increase students' awareness about this subject. The research paper revolves around the steps taken by the Department of Statistics at the University of Cape...

    Provided By University of Cape Town

  • White Papers // Jan 2010

    Telemedicine Using VoIP Combined With a Store and Forward Approach

    Rural areas in South Africa have unique conditions such as remoteness and scarcity of reliable public facilities. Information and Communication Technologies (ICTs) introduced into these areas must be suitable for these conditions. Using a user-centred design approach based on Participatory Design and Action Research, the paper has developed a telemedicine...

    Provided By University of Cape Town

  • White Papers // Jul 2009

    The Importance of Trust and Risk in M-Commerce: A South African Perspective

    Despite the hype associated with m-commerce and the massive revenue predictions by research companies, current adoption figures by consumers seem to demonstrate a lack of enthusiasm for more advanced services. A key reason cited in the literature is a lack of trust. M-commerce transactions are often characterised by complex technology,...

    Provided By University of Cape Town

  • White Papers // May 2009

    WiFi Hotspot Network Monitoring Tool: Project Proposal

    Wireless Fidelity (Wi-Fi) is a wireless networking technology that uses radio waves to provide high-speed, wireless internet and network connections. This technology is based on the IEEE 802.11 standards, including the 802.11a and 802.11b (IEEE, 1999). This technology has proven to be the fast-wireless networking approach that is relatively easy...

    Provided By University of Cape Town

  • White Papers // Jun 2010

    Mobile Cloud Computing: Embracing Network as a Service

    The recent emergence of Cloud Computing in the IT world has brought much hype and opened doors for new revenue streams and business models. The movement towards an all IP-based communication system has led to the IMS being accepted as the Next Generation Network (NGN) service control provisioning platform. The...

    Provided By University of Cape Town

  • White Papers // Jul 2010

    Modelling Channel Error in IEEE 802.11 Networks

    Modeling the performance of IEEE 802.11 networks has been done since the standard first appeared. Most of the models assume saturated traffic conditions and do not distinguish between traffic classes and above all, assume the wireless link to be error-free. Without making any of these assumptions, in this paper the...

    Provided By University of Cape Town

  • White Papers // Feb 2010

    Measuring Institutions: Indicators Of Political Rights, Property Rights And Political Instability In Malawi

    This paper aims to construct a new set of institutional indicators for Malawi. This political freedom index correlates strongly with the Freedom House political rights and civil liberties indices, but consists of a far longer time series, which can be used to examine long-run issues with greater efficacy. The high...

    Provided By University of Cape Town

  • White Papers // Sep 2010

    Exchange Rate Determination Under Monetary Policy Rules In A Financially Underdeveloped Economy: A Simple Model And Application to Mozambique

    Microstructure aspects of nominal exchange rate determination are less relevant in countries with embryonic financial markets. In less-developed economies, trade in goods and services is a more significant driver of currency demand than financial market speculation or hedging; and central banks actively set monetary variables. The authors develop a simple...

    Provided By University of Cape Town

  • White Papers // Dec 2008

    The Welfare Cost Of Banking Regulation

    The Basel Accords promote the adoption of capital adequacy requirements to increase the banking sector's stability. Unfortunately, this type of regulation can hamper economic growth by shifting banks' portfolios from more productive, risky investment projects toward less productive but safer projects. This paper introduces banking regulation in an overlapping-generations model...

    Provided By University of Cape Town

  • White Papers // Mar 2010

    The Composition Of Foreign Capital Stocks In South Africa: The Role Of Institutions, Domestic Risk And Neighbourhood Effects

    This paper investigates the determinants of the absolute volumes and composition of foreign capital stocks in South Africa, focusing on the role played by institutional quality (property rights), domestic risk and neighborhood effects as potential determinants. The empirical findings show that secure property rights and low risk in the host...

    Provided By University of Cape Town

  • White Papers // Aug 2008

    Exploring The Relationship Between Network Competence, Network Capability, And Firm Performance: A Resource Based Perspective In An Emerging Economy

    Growing attention to business-to-business networks and the demonstrated linkage between firm performance and collaborative efforts within these networks, fuels the continued search for a greater understanding of what is needed to manage in complex business constellations. A key component of this challenge, and the focus of this paper, is the...

    Provided By University of Cape Town

  • White Papers // Sep 2009

    Relationship Or Innovation Orientation In B2B Markets: Empirical Results From An Emerging Market

    Market orientation and innovation orientation, including their relationship with firm performance, are well-debated in prevailing marketing literature. Interestingly, relationship orientation, as an extension of market orientation, is yet to be subjected to similar investigation. While relationship orientation suggests that firms should invest in building relationships with clients and suppliers to...

    Provided By University of Cape Town

  • White Papers // Jul 2009

    Exploring the Use of Discrete Gestures for Authentication

    Research in user authentication has been a growing field in HCI. Previous studies have shown that people's graphical memory can be used to increase password memorability. On the other hand, with the increasing number of devices with built-in motion sensors, kinesthetic memory (or muscle memory) can also be exploited for...

    Provided By University of Cape Town