Tshwane University of Technology

Displaying 1-24 of 24 results

  • White Papers // Jun 2012

    The Role of Data Mining in Customer Relationship Management

    This paper has said focus on the role of data mining in Customer Relationship Management. Developments in technology have made relationship promoting a reality these days. Technologies such as data warehousing, data mining, and promotion management software have made customer relationship management a fresh area where firms can achieve a...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2012

    Effective and Efficient (Dis)similarity and Retrieval Algorithms Used to Access Large Image Databases

    The emergence of large image databases in organizations and on the Internet has prompted the need for effective and efficient retrieval systems. One part that contributes immensely to this is the (dis)similarity and retrieval algorithms used in the retrieval systems. This paper gives a brief review of (dis)similarity and retrieval...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    A Handover Scheme for Mobile WiMAX Using Signal Strength and Distance

    The addition to the WiMAX standard through 802.16e has made the standard more flexible and a potential choice as a wireless broadband technology. To support mobility in any wireless scheme, the application of an efficient handover control scheme is crucial. Any inefficiency experienced during data transmission in hard handover in...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    Operation and Performance of Cognitive Radios in Vehicular Environments

    In this paper, the authors look at the application of cognitive radio technology in vehicular networks. They explore some of the negative impacts of the vehicular environment on the operation of cognitive radios. This includes a cognitive radio operating as a secondary (unlicensed) user not detecting a primary (licensed) user...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    Formal Verification of Initial Network Entry in WiMAX Networks

    The Initial Network Entry procedure is the first stage in establishing a connection in an IEEE 802.16 (WiMAX) network. The process involves the transmission of unencrypted management messages, which constitutes a major security flaw. The Man-In-The-Middle (MITM) attack exploits this weakness in the network by eavesdropping, interception and fabrication of...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2011

    Rate Adaptation in Ad Hoc Networks Based on Pricing

    Nodes in ad hoc networks are autonomous and self-configuring with no form of centralized administration such that nodes are free to selfishly optimize their individual utilities without considering utilities of other network users. This compels users to transmit at high power leading to abnormal interference in the network hence degrades...

    Provided By Tshwane University of Technology

  • White Papers // May 2011

    Fast Handovers Without DAD Using Sector-Based Vehicular Mobile IPv6

    One of the major challenges faced in vehicular networks is the provision of seamless and continuous IP connectivity for on-board Internet users. This mainly emanates from long handover delays and packet loss problems. These hiccups can have severe effects such as Quality of Service (QoS) depreciation for delay-sensitive and throughput-sensitive...

    Provided By Tshwane University of Technology

  • White Papers // Mar 2011

    Wireless Communication Technology for Modular Mechatronic Controllers

    Modular mechatronics systems comprise of mechatronics sub-systems that are functionally complete and can be independently operated. These sub-systems can be readily fitted and connected to, or in combination with, additional sub-systems. Advantages of modular Mechatronics design of systems include flexibility to changing environmental needs, low-cost due to standardization of the...

    Provided By Tshwane University of Technology

  • White Papers // Jan 2011

    Power Control for Video Transmission Over Rural Wireless Mesh Networks

    Power problems pose a major challenge when deploying Wireless Mesh Networks (WMNs) in rural areas and hinder the sustainability of wireless mesh network in such areas. This paper introduces a mechanism for controlling transmission power for efficient video transmission in power-constrained rural areas. The mechanism increases the operational lifetime of...

    Provided By Tshwane University of Technology

  • White Papers // Oct 2010

    Towards Energy Efficient Mobile Communications

    The rapid growth and development of wireless communication services and applications corresponds to an increase in associated energy consumption. For broadband wireless network deployment in rural areas affected by unreliability and unavailability of national grid electricity supply, energy efficiency becomes a major design criterion to be considered. In such areas,...

    Provided By Tshwane University of Technology

  • White Papers // Sep 2010

    Discrete Polyphase Matched Filtering-Based Soft Timing Estimation for Mobile Wireless Systems

    In this paper the authors present a Soft Timing Phase Estimation (STPE) method for wireless mobile receivers operating in low Signal to Noise Ratios (SNRs). Discrete Polyphase Matched (DPM) filters, a Log-Maximum A Posterior probability (MAP) and/or a Soft-Output Viterbi Algorithm (SOVA) are combined to derive a new Timing Recovery...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2010

    A Multiple-State Based Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in Wireless Mesh Networks (WMNs). In this paper, the authors present asynchronous multiple-state based power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each Network Interface Card (NIC) or radio...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    QoS Management in a Multilayer WiMAX System

    In 2008, telecommunication market trends in Africa reported 0.2% penetration for Broadband Wireless Access (BWA) technologies. IEEE 802.16 (WiMAX) is recognized as a promising technology to provide BWA for heterogeneous traffic. Among the various features defined in the standard, some features such as the scheduling algorithm is undefined. A new...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    A Low Complexity Greedy Scheduler for Multiuser MIMO Downlink

    It is widely believed that the implementation of Multi-User Multiple Input Multiple Output (MU-MIMO) technology at the radio access portion of current and future wireless networks would positively impact on the performance of such networks especially in terms of system capacity. This however, demands, the design of efficient multi-user scheduling...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Improving the Performance of 802.11 Wireless LANs With MAC Adaptation

    With the increasing deployment of 802.11-based Wireless Local Area Networks (WLANs), the need to optimize the performance of 802.11 for emerging network applications has turned out to be a matter of concern. This paper proposes a Transport Control Protocol (TCP) and Medium Access Control (MAC) interaction strategy which manages the...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Energy-Efficient Algorithm Based on Gradient Based Routing in Wireless Sensor Networks

    Energy efficiency is one of the critical parameters for the routing protocol in wireless sensor networks. In this paper, two energy efficient algorithms based on the Gradient-Based Routing (GBR) protocol are proposed. First, a Competing algorithm for GBR (GBR-C) is proposed. The core idea in this algorithm is to forward...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Spectrum Access Games for Cognitive Radio Networks

    Cognitive Radio (CR) is seen as a key enabling technology for addressing current underutilization and inefficient use of radio frequency spectrum. The use of CR will see most of the spectrum white spaces being used opportunistically without causing any interference to the licensed or primary users. CRs can collaborate in...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Decentralized Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energy-consumption. Several previous studies have focused on the single radio wireless configurations while studying power control problems. However, such contributions cannot solve the power control problems in MRMC configurations because of the architectural and structural differences...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Decentralized Power Control for Multi-Radio Multi- Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energy-consumption. Several previous studies have focused on the single radio wireless configurations while studying power control problems. However, such contributions can not solve the power control problems in MRMC configurations because of the architectural and structural...

    Provided By Tshwane University of Technology

  • White Papers // May 2010

    Analysis of Distributed Resource Allocation in MIMO Systems Using Game Theory

    Research has shown that efficient and effective radio resource management is a key requirement for improved capacity and quality of service in wireless communication networks. Most resource management schemes are based on centralized frameworks where a central resource manager performs all the resource allocation functions. Centralized schemes have been proven...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    An Enhanced Scheduler for the Guarantee of QoS Multimedia Services in WiMAX Networks

    The rapid deployment of broadband wireless access has led to growing demand for multimedia applications in networks. Efficient sharing of resources becomes an issue especially in wireless networks where different applications have varying Quality of Service (QoS) requirements. As a result, an optimum utilization of the limited resources is required....

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    Per Cell Propagation Model Calibration Approach for Mobile Positioning

    This paper presents results of research on per cell propagation calibration-based mobile positioning for GSM. A novel mobile positioning system for GSM networks is proposed and assessed by field measurements and simulations. It utilizes timing advance, Received Signal Strength (RSS) and a per cell-tuned propagation prediction model. Clutter features are...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    Range Based Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. In this paper, the authors present a range based dynamic power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each radio assigned to a unique UCG adjusts the...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2009

    Financial Management, Accounting And Auditing Skills Shortage, A South African Reality

    This paper draws on a study completed on behalf of the South African Institute of Chartered Accountants (SAICA). It addresses part of the research conducted to determine the existing skills shortage in the accounting, auditing and financial management areas in the country. It provides the basis for the additional research...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2009

    Financial Management, Accounting And Auditing Skills Shortage, A South African Reality

    This paper draws on a study completed on behalf of the South African Institute of Chartered Accountants (SAICA). It addresses part of the research conducted to determine the existing skills shortage in the accounting, auditing and financial management areas in the country. It provides the basis for the additional research...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    An Enhanced Scheduler for the Guarantee of QoS Multimedia Services in WiMAX Networks

    The rapid deployment of broadband wireless access has led to growing demand for multimedia applications in networks. Efficient sharing of resources becomes an issue especially in wireless networks where different applications have varying Quality of Service (QoS) requirements. As a result, an optimum utilization of the limited resources is required....

    Provided By Tshwane University of Technology

  • White Papers // Aug 2010

    A Multiple-State Based Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in Wireless Mesh Networks (WMNs). In this paper, the authors present asynchronous multiple-state based power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each Network Interface Card (NIC) or radio...

    Provided By Tshwane University of Technology

  • White Papers // Sep 2010

    Discrete Polyphase Matched Filtering-Based Soft Timing Estimation for Mobile Wireless Systems

    In this paper the authors present a Soft Timing Phase Estimation (STPE) method for wireless mobile receivers operating in low Signal to Noise Ratios (SNRs). Discrete Polyphase Matched (DPM) filters, a Log-Maximum A Posterior probability (MAP) and/or a Soft-Output Viterbi Algorithm (SOVA) are combined to derive a new Timing Recovery...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    A Low Complexity Greedy Scheduler for Multiuser MIMO Downlink

    It is widely believed that the implementation of Multi-User Multiple Input Multiple Output (MU-MIMO) technology at the radio access portion of current and future wireless networks would positively impact on the performance of such networks especially in terms of system capacity. This however, demands, the design of efficient multi-user scheduling...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    Range Based Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. In this paper, the authors present a range based dynamic power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each radio assigned to a unique UCG adjusts the...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2009

    Per Cell Propagation Model Calibration Approach for Mobile Positioning

    This paper presents results of research on per cell propagation calibration-based mobile positioning for GSM. A novel mobile positioning system for GSM networks is proposed and assessed by field measurements and simulations. It utilizes timing advance, Received Signal Strength (RSS) and a per cell-tuned propagation prediction model. Clutter features are...

    Provided By Tshwane University of Technology

  • White Papers // Jan 2011

    Power Control for Video Transmission Over Rural Wireless Mesh Networks

    Power problems pose a major challenge when deploying Wireless Mesh Networks (WMNs) in rural areas and hinder the sustainability of wireless mesh network in such areas. This paper introduces a mechanism for controlling transmission power for efficient video transmission in power-constrained rural areas. The mechanism increases the operational lifetime of...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Spectrum Access Games for Cognitive Radio Networks

    Cognitive Radio (CR) is seen as a key enabling technology for addressing current underutilization and inefficient use of radio frequency spectrum. The use of CR will see most of the spectrum white spaces being used opportunistically without causing any interference to the licensed or primary users. CRs can collaborate in...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    QoS Management in a Multilayer WiMAX System

    In 2008, telecommunication market trends in Africa reported 0.2% penetration for Broadband Wireless Access (BWA) technologies. IEEE 802.16 (WiMAX) is recognized as a promising technology to provide BWA for heterogeneous traffic. Among the various features defined in the standard, some features such as the scheduling algorithm is undefined. A new...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Decentralized Power Control for Multi-Radio Multi-Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energy-consumption. Several previous studies have focused on the single radio wireless configurations while studying power control problems. However, such contributions cannot solve the power control problems in MRMC configurations because of the architectural and structural differences...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Energy-Efficient Algorithm Based on Gradient Based Routing in Wireless Sensor Networks

    Energy efficiency is one of the critical parameters for the routing protocol in wireless sensor networks. In this paper, two energy efficient algorithms based on the Gradient-Based Routing (GBR) protocol are proposed. First, a Competing algorithm for GBR (GBR-C) is proposed. The core idea in this algorithm is to forward...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Improving the Performance of 802.11 Wireless LANs With MAC Adaptation

    With the increasing deployment of 802.11-based Wireless Local Area Networks (WLANs), the need to optimize the performance of 802.11 for emerging network applications has turned out to be a matter of concern. This paper proposes a Transport Control Protocol (TCP) and Medium Access Control (MAC) interaction strategy which manages the...

    Provided By Tshwane University of Technology

  • White Papers // Jul 2010

    Decentralized Power Control for Multi-Radio Multi- Channel Wireless Mesh Networks

    Multi-Radio Multi-Channel (MRMC) WMNs result in power control problems including interference, un-scalable connectivity and energy-consumption. Several previous studies have focused on the single radio wireless configurations while studying power control problems. However, such contributions can not solve the power control problems in MRMC configurations because of the architectural and structural...

    Provided By Tshwane University of Technology

  • White Papers // Oct 2010

    Towards Energy Efficient Mobile Communications

    The rapid growth and development of wireless communication services and applications corresponds to an increase in associated energy consumption. For broadband wireless network deployment in rural areas affected by unreliability and unavailability of national grid electricity supply, energy efficiency becomes a major design criterion to be considered. In such areas,...

    Provided By Tshwane University of Technology

  • White Papers // Mar 2011

    Wireless Communication Technology for Modular Mechatronic Controllers

    Modular mechatronics systems comprise of mechatronics sub-systems that are functionally complete and can be independently operated. These sub-systems can be readily fitted and connected to, or in combination with, additional sub-systems. Advantages of modular Mechatronics design of systems include flexibility to changing environmental needs, low-cost due to standardization of the...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2011

    Rate Adaptation in Ad Hoc Networks Based on Pricing

    Nodes in ad hoc networks are autonomous and self-configuring with no form of centralized administration such that nodes are free to selfishly optimize their individual utilities without considering utilities of other network users. This compels users to transmit at high power leading to abnormal interference in the network hence degrades...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    Operation and Performance of Cognitive Radios in Vehicular Environments

    In this paper, the authors look at the application of cognitive radio technology in vehicular networks. They explore some of the negative impacts of the vehicular environment on the operation of cognitive radios. This includes a cognitive radio operating as a secondary (unlicensed) user not detecting a primary (licensed) user...

    Provided By Tshwane University of Technology

  • White Papers // May 2011

    Fast Handovers Without DAD Using Sector-Based Vehicular Mobile IPv6

    One of the major challenges faced in vehicular networks is the provision of seamless and continuous IP connectivity for on-board Internet users. This mainly emanates from long handover delays and packet loss problems. These hiccups can have severe effects such as Quality of Service (QoS) depreciation for delay-sensitive and throughput-sensitive...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    A Handover Scheme for Mobile WiMAX Using Signal Strength and Distance

    The addition to the WiMAX standard through 802.16e has made the standard more flexible and a potential choice as a wireless broadband technology. To support mobility in any wireless scheme, the application of an efficient handover control scheme is crucial. Any inefficiency experienced during data transmission in hard handover in...

    Provided By Tshwane University of Technology

  • White Papers // Aug 2011

    Formal Verification of Initial Network Entry in WiMAX Networks

    The Initial Network Entry procedure is the first stage in establishing a connection in an IEEE 802.16 (WiMAX) network. The process involves the transmission of unencrypted management messages, which constitutes a major security flaw. The Man-In-The-Middle (MITM) attack exploits this weakness in the network by eavesdropping, interception and fabrication of...

    Provided By Tshwane University of Technology

  • White Papers // May 2010

    Analysis of Distributed Resource Allocation in MIMO Systems Using Game Theory

    Research has shown that efficient and effective radio resource management is a key requirement for improved capacity and quality of service in wireless communication networks. Most resource management schemes are based on centralized frameworks where a central resource manager performs all the resource allocation functions. Centralized schemes have been proven...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2012

    Effective and Efficient (Dis)similarity and Retrieval Algorithms Used to Access Large Image Databases

    The emergence of large image databases in organizations and on the Internet has prompted the need for effective and efficient retrieval systems. One part that contributes immensely to this is the (dis)similarity and retrieval algorithms used in the retrieval systems. This paper gives a brief review of (dis)similarity and retrieval...

    Provided By Tshwane University of Technology

  • White Papers // Jun 2012

    The Role of Data Mining in Customer Relationship Management

    This paper has said focus on the role of data mining in Customer Relationship Management. Developments in technology have made relationship promoting a reality these days. Technologies such as data warehousing, data mining, and promotion management software have made customer relationship management a fresh area where firms can achieve a...

    Provided By Tshwane University of Technology