Browsing Prof. William Tucker by Title

Now showing items 52-71 of 89

    • Open user interconnect and quality of communication 

      Tucker, William David; Blake, Edwin H.; Marsden, Gary (Telkom, 2004)
      We looked for and found two situations within the South African Digital Divide where constant and severe macro-scale latencies would most likely interfere with the usage of Information and Communication Technology (ICT) ...

    • Optimisation of SlotTime for a single-radio Mid-Range Multi-hop Wireless Mesh Network 

      Rey-Moreno, Carlos; Tucker, William David; Simo-Reigadas, Javier (Telkom SA, 2014)
      This paper presents the business context and results of an optimisation exercise for a single-radio mid-range multi-hop wireless mesh network for the provision of VoIP services. This WiFi mesh network physically covers 30 ...

    • A participatory design for a billing system: A South African case study of a community based telephony system 

      Ufitamahoro, Marie Josee; Venter, Isabella; Rey-Moreno, Carlos; Tucker, William David (ACM, 2014)
      This paper describes the role participatory design can play in developing and implementing an information and communication technology for development project in a rural area. It shows how the process of co-designing an ...

    • Performance Evaluation of a Wireless Network using a VoIP Traffic Generator on a Mobile Device 

      Tiemeni, Ghislaine Livie Ngangom; Venter, Isabella; Tucker, William David (ACM, 2014)
      The problem of generating different patterns of traffic to emulate real user behaviour is receiving considerable attention with the construction of new and more complex network architectures. The theoretical modelling of ...

    • Please call ME.N.U.4EVER: designing for “Callback” in rural Africa 

      Bidwell, Nicola J.; Lalmas, Mounia; Marsden, Gary; Dlutu, Bongiwe; Ntlangano, Senzo; Manjingolo, Azola; Tucker, William David; Jones, Matt; Robinson, Simon; Vartiainen, Elina; Klampanos, Iraklis (Product & Systems Internationalisation, Inc, 2011)
      Designers and developers are naïve about the ways impoverished people in rural Africa innovate new uses of mobile technology to circumvent access difficulties. Here, we report on the local appropriation of an USSD ‘Callback’ ...

    • Policy-based network management of legacy equipment in Next Generation Networks 

      Naidoo, Vaughn; Tucker, William David (Telkom, 2001)
      Next Generation Networks use policy-based network management and QoS protocols to provide voice services on IP networks. Large numbers of older equipment still push IP packets. We present several solutions that include ...

    • Preparation of Deaf end-users and the softbridge for semi-automated relay trials 

      Glaser, Meryl; Tucker, William David; Mashao, Daniel (Telkom, 2004)
      Following on the development of several prototypes, we have built a semi-automated Deaf Telephony prototype on the SoftBridge platform. This prototype relays text and speech between Deaf users on the Internet and hearing ...

    • Reflection on three years of rural wireless Internet Protocol communication 

      Tucker, William David; Blake, Edwin H.; Marsden, Gary; Pearson, Murray; Westerveld, Rudi (Telkom, 2007)
      This paper reports on three years of research and fieldwork with a rural wireless Internet Protocol communication project. We built a long-range WiFi network and custom communication software to support a rural telehealth ...

    • Reliable communication across ad hoc networks 

      Daniels, Francois; Tucker, William David (Telkom, 2008)
      This paper presents a fully decentralised peer-topeer voice communication tool intended for use across mobile ad hoc networks (MANET) by distributed groups who desired collaboration. We examined the synergy between MANETs ...

    • The role of Outcome Mapping in developing a rural telemedicine system 

      Tucker, William David; Blake, Edwin H. (International Information Management Corporation, 2008)
      We describe the use of Outcome Mapping to guide the design of a rural telemedicine consultation system in South Africa. While Outcome Mapping was not primarily intended to guide design, we show that it tied in well with a ...

    • Rural Wireless Mesh Network Analysis on Mobile Devices 

      Tiemeni, Ghislaine Livie Ngangom; Venter, Isabella; Tucker, William David (Telkom SA, 2014)
      The aim of this research effort is to build an efficient and accurate mobile traffic generator based on open source computer-based traffic generator software. A high performance mobile traffic generator would make the ...

    • Secure contactless smart card transactions on mobile devices 

      Poroye, Adeola; Tucker, William David; Norman, Michael (Telkom, 2009)
      This paper presents work in progress to explore the utility of Near Field Communication technology to secure mobile financial services. The objective is to evaluate the potential of this approach as an upcoming technology ...

    • Security of a Mesh Potato Network in Ad Hoc Mode 

      Mauwa, H.; Tucker, William David (Telkom, 2013)
      Wireless Mesh Networks can provide low cost and reliable community-owned connectivity in developing rural areas. A rural community can use mesh networks to access a wide range of modern information and communication ...

    • SignSupport: a limited communication domain mobile aid for a Deaf patient at the pharmacy 

      Motlhabi, Michael B.; Glaser, Meryl; Tucker, William David (Telkom, 2013)
      This paper discusses a prototype for a communication aid on a mobile phone to support a Deaf1 person visiting a public hospital pharmacy. The aim is to prevent problems of non-compliance to treatment due to poor communication ...

    • SIP presence location service 

      Wu, Wilson; Radovanovic, Aleksander; Tucker, William David (Telkom, 2005)
      This paper presents an innovative use of the Session Initiation Protocol (SIP) for the subscription and notification of geographic information in order to provide a privacy concerned location-based service. SIP is a signaling ...

    • Situation-aware routing based on link quality for static mesh networks with mobile nodes 

      Kobo, Hlabishi Isaac; Tucker, William David; Liu, Xiao Ming (Telkom, 2011)
      Situation-aware routing seeks to improve quality of service on hybrid wireless mesh networks by making routing decisions based on the current situation of the network. BATMAN-adv is a mesh routing protocol that counts ...

    • Situation-aware routing for wireless mesh networks with mobile nodes 

      Kobo, Hlabishi Isaac; Tucker, William David (IIMC International Information Management Corporation, 2012)
      This paper describes a situation-aware algorithm based on the current situation of a mesh network with mobile nodes that improves quality of service. After running laboratory performance tests, we concluded that a ...

    • Socially aware software engineering for the developing world 

      Blake, Edwin H.; Tucker, William David (IIMC International Information Management Corporation, 2006)
      While the social effects of Information Technology (IT) have received much attention there is very little work on targeted methodologies to develop IT applications and content in a developing world environment. This paper ...

    • Socio-economic aspects of voice-over-IP technology in rural SA 

      Roro, Zukile; Rey-Moreno, Carlos; Tucker, William David; Siya, Masbulele Jay (Telkom, 2012)
      This paper describes work in progress towards developing a business case and preliminary design for an 802.11-based mesh network in the remote rural community of Mankosi in the Eastern Cape province of South Africa. Aside ...

    • SoftBridge in action: the first Deaf telephony pilot 

      Tucker, William David; Glaser, Meryl; Lewis, John (Telkom, 2003)
      Following on several partial prototypes, we built an automated Deaf Telephony bridging application with the SoftBridge platform. The SoftBridge performs multi-modal bridging in real-time using Text-to-Speech (TTS) and ...