Towards a scalability model for wireless mesh networks

Zenzeleni mesh network is a wireless ad-hoc mesh network that provides voice services using public analogue telephones to the Mankosi community in the Eastern Cape Province. We would like to improve on the network infrastructure by upgrading the mesh routers and introducing low-end smartphones onto the network; and offer both data and voice over Internet protocol services. However, before deploying resources, it is imperative to identify the maximum number of mesh nodes, clients and simultaneous voice over internet protocol calls that can be supported by the mesh network while maintaining acceptable quality of service levels. Absence of such data might lead to financial risk and time depletion when setting up an optimal network. Bolstering the claim are investigations that report drop in quality levels as network density and hop count escalate. As current investigations mostly yield capacity models to predict per-node throughput with increasing hop count, we propose experiments to devise a scalability model to quantify scalability of mesh networks in this paper. We recommend experimental implementations at simulation level in Network Simulator-3 moving on to testbeds built using WiBed, and then finally take results to the field.Telkom, Cisco, Aria Technologies, THRIP, CONFINEDepartment of HE and Training approved lis

Design of the MESH Network for the Rural Educational Institution of Mambita, located in the Municipality of Ubalá - Cundinamarca Colombia

This article presents the design of a MESH network and the creation of wireless antennas to provide Internet access and other services to the community of the Institución Educativa Rural Departamental Mambita located in the village/caserío of Mambita in the municipality of Ubalá in the department of Cundinamarca. The development was carried out within the framework of a project developed by students and professors of the Universidad Libre in Colombia. As a result, a MESH network consisting of four nodes was designed and simulated and four antennas were created for communications between the branches that make up the educational institution

Evaluating energy consumption on low-end smartphones

The relationship between battery consumption in smartphones and the usage statistics of a phone is direct. Modern smartphones, even low-end, are equipped with multiple wireless technologies, e.g. GSM, 3G, WiFi and Bluetooth. Each of these technologies has a different energy consumption profile. A wireless mesh project in the Mankosi community in rural South Africa is about to introduce low-end smartphones onto the network. The mesh network is powered with solar-charged batteries because the community at present does not have electricity. Local residents also use these batteries to recharge cell phones at a nominal cost. Introduction of smartphones will increase the recharge frequency as phone usage will increase; thus draining a phone battery more quickly, as well as escalate recharge costs. Thus, the smartphones must be chosen and used effectively in order for batteries to last longer. Related work identifies WiFi wireless technology as the most battery efficient way of transfer when compared to GSM, 3G and Bluetooth. This research proposes experiments to further investigate energy efficiency of WiFi in low-end smartphones that we intend to use for local and breakout voice over Internet protocol (VoIP) calls and data services, on a rural wireless mesh network

A mobile platform traffic generator for network performance evaluation

This work in progress paper presents an overview of the development of an efficient and accurate mobile traffic generator based on an open source computer-based traffic generator software. A high performance mobile traffic generator would simplify the evaluation of the quality of networks deployed in remote areas. The motivation for this software is to ease feasibility testing and monitoring in the field particularly in rural areas by using affordable and lightweight technology such as a mobile device. Furthermore, a mobile system is more suitable than a personal computer (PC) or laptop in a rural area where the deployment of computers is difficult and impractical. To conduct the research, both an experimental and a simulation research methodology will be applied and the method of investigation will combine methods such as laboratory experiments, document analysis and a literature survey.Telkom, Cisco, Aria Technologies, THRIPDepartment of HE and Training approved lis

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

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 artifact can reflect and shape social development. A case study was conducted in the Mankosi Community in the Eastern Cape with the aim of designing and implementing a billing system for an existing community-owned telephony system, by accommodating the community’s requirements. Relevant criteria had to be considered for this telephony system based on voice over Internet Protocol with the possibility of ‘break-out’ calls to external networks. Different payment modalities were explored that would allow for a transparent method of both collecting money and applying the collected funds to achieve the project’s sustainability. A participative methodology with future users and operators of the network—using scenarios and prototypes to illustrate the implementation—informed the design of the billing system. Data was collected by means of unstructured interviews and focus group discussions. Qualitative data was analyzed using a qualitative content analysis tool. The community indicated that a billing system, based on both vouchers and prepaid service, would satisfy their needs.Telkom, Cisco, Aria Technologies, THRIPDepartment of HE and Training approved lis

Design trade-offs of crowdsourced web access in community networks

© 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes,creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Internet access has become a requirement to participate in society; however, the majority of the world’s population is not yet online. Citizens can self-organize cooperatively to crowdsource community network infrastructures and achieve Internet access. In order to help address that challenge, this paper provides an analysis of a crowdsourced Internet access mechanism: the distributed Web proxy service in one of the largest community networks in the world. Several perspectives were considered in this analysis, e.g., data traffic, networking issues, and proxies responsiveness. The evaluation results show how the current manual proxy choice, based on social clues, becomes a popular service plagued with hot spots and ineffi- ciencies, which opens several opportunities for improving these infrastructures. By taking advantage of it, our research shows that the trade-offs between informed proxy selection and admission control in proxies, could alleviate imbalances and uncertainty, and also improve the service with little additional burden. This represents an explicit and direct mechanism for improving the service provided by these community networks, and a clear benefit for its members.Peer ReviewedPostprint (author's final draft

Revisão sistemática sobre o acesso à internet em propriedades rurais

O desenvolvimento tecnológico propiciou o uso crescente da computação nos mais diversos setores da sociedade moderna. Entretanto, uma parcela da população mundial, devido a problemas de conexão e mesmo de acesso ao conhecimento, ainda possui sérias dificuldades para usufruir do potencial disponibilizado pela tecnologia, em especial ferramentas de acesso à Internet. Nesse contexto, o trabalho realiza uma revisão sistemática da literatura. Foram selecionados 14 artigos dos 101 retornados pela ACM Digital Library referentes aos temas de uso da computação e o acesso à Internet nos estabelecimentos rurais, levando em consideração pesquisas de caráter técnico e social. Além disso, os estudos selecionados contemplam países dos mais diferentes padrões econômicos, estruturais e geográficos, demonstrando assim as diversidades e semelhanças entre os mesmos. O objetivo do estudo é identificar problemas e dificuldades no uso de Internet e software em estabelecimentos agrícolas das zonas rurais em nível mundial. Dessa forma foi possível propiciar uma reflexão sobre o quanto as novas tecnologias impactam fora das grandes áreas urbanas.Sociedad Argentina de Informática e Investigación Operativ

Gender and participation: critical reflection on Zenzeleni Networks in Mankosi, South Africa

This paper unveils the complexity of gender dynamics by reflecting on lessons learned in Zenzeleni Networks and provides a different perspective to notions of “participation” by asking “who participates and how?” The paper employs a feminist conceptual framework, particularly social constructionist theory and intersectionality, to understand women’s participation and experience, analyzing multi-layered and intersecting structural injustices that marginalize women’s choices, empowerment, scope for agency, and sense of ownership. In-depth interviews and focus group discussions gathered information from women living in Mankosi and women who are working for Zenzeleni Networks, respectively. Results show that gendered power dynamics of the community were reproduced within Zenzeleni Networks. Although women play a key role in the everyday operationalization of Zenzeleni Networks, their role has been considered part of their domestic duties, which results in misrecognition and underrepresentation of their work.CONFINE Integrated Project FIRE #288535 Telkom, Cisco and Aria Technologies via the Telkom Centre of Excellence (CoE) programme

Local ownership, exercise of ownership and moving from passive to active entitlement: a practice-led inquiry on a rural community network

In this paper, we aim to shed light on local ownership from a double practical and theoretical perspective, and examine its meaning as well as the factors that are bound to influence its development in community based interventions. The questions we intend to answer are: How can 'local ownership' be defined in a way that facilitates its investigation in CI practice, and enables at the same time its theoretical examination and relation with other CI key conceptual constructs? What key factors contribute to fostering local ownership in CI initiatives, taking the case of an externally initiated rural community network? To answer these questions, the paper reports on a study which assessed the development of local ownership in a rural community network in South Africa and singled out the factors found to delineate the development of a sense of ownership in local people, as well as driving the exercise of ownership towards autonomous local action. Based on a detailed analysis of the development of community ownership in this project, and in constant dialogue with the community informatics and social science literature, the paper makes three key contributions to CI theory and practice, as well as more specifically to future practice in community networks: An operational definition of local ownership and a conceptual model which highlights relations to other constructs such as responsibility, power and control and emphasises the role of local ownership in moving from passive to active entitlement towards community assets or CI interventions An empirical analysis of the development of local ownership in a community network in rural South Africa, highlighting the critical factors that led to fostering ownership An examination and critical discussion of factors that are positively related with the development of ownership, carried out in dialogue with CI scholarship and highlighting the bearing of and relations with other critical constructs in CI research, such as participation, empowerment, and capacity building These contributions come at a critical stage in community informatics development as a discipline, in which, we argue, a more solid and critical engagement with theory is required to firmly establish its place and the premises for dialogue with other sociotechnical disciplines.Web of Scienc