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Browsing by Author "Ntlatlapa, Ntsibane S"

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Autonomous transmission power adaptation for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2008 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. Previous studies have emphasized throughput maximization in such systems as the main design challenge and transmission power control treated as a secondary ... Read more
Autonomous transmission power adaptation for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. Previous studies have emphasized through- put maximization in such systems as the main design challenge and transmission power control treated as a secondary ... Read more
Building a sustainable research & HCD eco-system: Case study of two wireless communication eco systems

Author: Mekuria, Fisseha ; Twala, B ; Marwala, T ; Ntlatlapa, Ntsibane S Date: May 2013 The paper describes the organization and management of two wireless eco-systems in next generation wireless communications research and human capacity development. The developed eco-systems have been tested and presented at an international ... Read more
Comparison of routing metrics for wireless mesh networks

Author: Nxumalo, SL ; Adigun, MO ; Mudali, P ; Ntlatlapa, Ntsibane S ; Ncanana, SM Date: Sep 2011 A number of routing metrics exist in wireless networks. These routing metrics were originally designed for mobile ad hoc networks (MANETs). When Wireless Mesh Networks (WMNs) came into being, an idea of introducing and using these routing ... Read more
Decentralized power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2010 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 ... Read more
Design and implementation of a topology control scheme for wireless mesh networks

Author: Mudali, P ; Nyandeni, TC ; Ntlatlapa, Ntsibane S ; Adigun, MO Date: Sep 2009 The Wireless Mesh Network (WMN) backbone is usually comprised of stationary nodes but the transient nature of wireless links results in changing network topologies. Topology Control (TC) aims to preserve network connectivity in ad hoc and ... Read more
Digital television in the delivery of multimedia education content.

Author: Ntlatlapa, Ntsibane S ; Dlodlo, N Date: Nov 2012 Broadband access has not reached all corners of South Africa, and yet the need to deliver multimedia education content to all schools in the country remains the same. Low-cost, appropriate technologies would enable schools in areas that would ... Read more
Dynamic channel assignment scheme for multi-radio wireless mesh networks

Author: Kareem, TR ; Matthee, Karel W ; Chan, HA ; Ntlatlapa, Ntsibane S Date: Sep 2008 This paper investigates the challenges involve in designing a dynamic channel assignment (DCA) scheme for wireless mesh networks, particularly for multi-radio systems. It motivates the need for fast switching and process coordination modules ... Read more
Dynamic power control for wireless backbone mesh networks: a survey

Author: Olwal, TO ; Van Wyk, BJ ; Ntlatlapa, Ntsibane S ; Djouani, K ; Siarry, P ; Hamam, Y Date: 2010 With the tremendous growth of wireless networks into the next generation to provide better services, Wireless Mesh Networks (WMNs) have emerged to offer ubiquitous communication and seamless broadband applications. WMNs are hybrid networks ... Read more
Energy and spectrum efficiency in rural areas based on cognitive radio technology

Author: Masonta, Moshe T ; Ntlatlapa, Ntsibane S ; Mzyece, M Date: Sep 2009 The rapid growth and development observed in wireless communications has resulted in the overcrowding of the radio spectrum used as a communication medium in wireless networks. In many countries, governmental agencies regulate the use of the ... Read more
Energy saving scheme for internet provision in rural africa: LESS

Author: Masonta, Moshe T ; Olwal, T ; Ntlatlapa, Ntsibane S Date: May 2010 In the past decade, the access to telephone services has increased drastically due to the deployment of wireless technologies and liberalization of telecommunications markets. But internet access in most African rural communities still remains ... Read more
Energy-aware path selection metric for IEEE 802.11s wireless mesh networking

Author: Mhlanga, Martin M ; Nyandeni, TC ; Olwal, TO ; Ntlatlapa, Ntsibane S ; Adigun, MO Date: Aug 2009 The IEEE 802.11s working group has commenced activities, which would lead to the development of a standard for wireless mesh networks (WMNs). The draft of 802.11s introduces a new path selection metric called airtime link metric. However, ... Read more
Energy-aware path selection metric for IEEE 802.11s wireless mesh networking

Author: Mhlanga, Martin M ; Nyandeni, TC ; Olwal, TO ; Ntlatlapa, Ntsibane S ; Adigun, MO Date: 2009 The IEEE 802.11s working group has commenced activities, which would lead to the development of a standard for wireless mesh networks (WMNs). The draft of 802.11s introduces a new path selection metric called airtime link metric. However, ... Read more
Energy-efficient wireless mesh networks

Author: Ntlatlapa, Ntsibane S Date: Jun 2007 This paper outlines the objectives of a recently formed research group at Meraka Institute. The authors consider application of wireless mesh networks in rural infrastructure deficient parts of the African continent where nodes operate on ... Read more
Evaluating transceiver power savings produced by connectivity strategies for infrastructure wireless mesh networks

Author: Mudali, P ; Mutanga, MB ; Adigun, MO ; Ntlatlapa, Ntsibane S Date: Jun 2011 Infrastructure Wireless Mesh Networks (I-WMNs) are increasingly used to bridge the digital divide in rural areas around the world. Rural African areas in particular require energy efficient I-WMNs as the nodes comprising the I-WMN backbone ... Read more
Interference-aware power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Sep 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in WMNs. In this paper, we present a dynamic power control for MRMC WMNs. First, WMN is represented as a set of disjoint Unified Channel Graphs (UCGs). Second, each ... Read more
Multiple-state based power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Djouani, K ; van Wyk, BJ ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in wireless mesh networks (WMNs). In this paper, we present asynchronous multiple-state based power control for MRMC WMNs. First, WMN is represented as a set of disjoint ... Read more
Performance evaluation of routing metrics for wireless mesh networks

Author: Nxumalo, SL ; Ntlatlapa, Ntsibane S ; Mudali, P ; Adigun, MO Date: Aug 2009 A routing metric is a measure used by a routing protocol to select a best path, without a routing metric a protocol will not know which path to use to send a packet. A number of routing metrics exist for WMN, but routing still remains a problem ... Read more
Range based power control for multi-radio multi-channel wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Djouani, K ; Hamam, Y ; Siarry, P ; Ntlatlapa, Ntsibane S Date: Aug 2009 Multi-Radio Multi-Channel (MRMC) systems are key to power control problems in Wireless Mesh Networks (WMNs). In this paper, researchers present a range based dynamic power control for MRMC WMNs. First, WMN is represented as a set of disjoint ... Read more
Scalable power selection method for wireless mesh networks

Author: Olwal, TO ; Van Wyk, BJ ; Hamam, Y ; Ntlatlapa, Ntsibane S Date: 2009 This paper addresses the problem of a scalable dynamic power control (SDPC) for wireless mesh networks (WMNs) based on IEEE 802.11 standards. An SDPC model that accounts for architectural complexities witnessed in multiple radios and hops ... Read more

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