| 1. |
- Lysko, Albert A., et al.
(författare)
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First Large TV White Spaces Trial in South Africa : A Brief Overview
- 2014
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Ingår i: 2014 6th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781479952915 ; , s. 407-414
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Konferensbidrag (refereegranskat)abstract
- The paper overviews African first of the really large scale trials of television (TV) white space (TVWS) technology and white space devices (WSDs) designed to co-use the frequency spectrum allocated to TV broadcasting. The WSD obtains information about availability of the spectrum in a particular area for a particular period of time from a geolocation spectrum database (GLSD). The GLSD bases its estimations about the availability on stored information about primary users/transmitters in the area, propagation prediction algorithms and local spectrum management regulations. As the overall system is fairly complex and new, extensive testing and trials are required to prove its functionality and compatibility with existing users of the spectrum. Some of the experiences, specifically those from the largest in Africa TVWS trial providing Internet to 10 large schools, held in Tygerberg, South Africa, and conclusions on testing of WSD and use of white space are overviewed.
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| 2. |
- Mekuria, Fisseha, 1962-, et al.
(författare)
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Spectrum Sharing & Affordable Broadband in 5G
- 2017
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Ingår i: 2017 Global Wireless Summit (GWS). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781538610985 ; , s. 114-118
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Konferensbidrag (refereegranskat)abstract
- The 5th generation wireless ICT eco-system is being standardized with 3 important pillars of innovation: (a) Low latency, (b) Enhanced gigabits wireless broadband and (c) massive machine type communication. 5G is expected to transform the way humans and devices communicate and exchange services and automation of industry. The aim of this paper is to extend recent research in unlicensed wireless technologies, including current 5G research activities to develop use cases and associated technologies to address the requirements of affordable wireless broadband The ITU broadband commission clearly indicates the need for affordable broadband connectivity and provision of ICT based societal services in emerging markets and specifically rural communities. The three aspects are spectrum sharing including unlicensed spectrum networks, energy efficiency including green networking and the promise of network infrastructure cost reduction by SDN/NFV technologies. In this paper the first aspect on spectrum sharing for 5G and affordable networks will be discussed with a network test-bed developed as proof of concept. Finally the paper will conclude with a challenge to existing and future research in technology standards for 5G to contribute towards the achievement of universal affordable broadband for the next billion customers.
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| 3. |
- Mekuria, Fisseha, 1962-, et al.
(författare)
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Spectrum Sharing for Unlicensed 5G Networks
- 2019
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Ingår i: 2019 IEEE Wireless Communications and Networking Conference (WCNC). - : Institute of Electrical and Electronics Engineers (IEEE). - 9781538676462
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Konferensbidrag (refereegranskat)abstract
- 5th generation wireless ICT eco-system promises three important pillars of network innovation: (a) Ultra Reliable Low Latency Communication, (b) Enhanced gigabits wireless broadband and (c) massive machine type communication. 5G is expected to transform the way humans and devices communicate and exchange services and improved automation of industry. The aim of this paper is to discuss recent research in spectrum sharing and unlicensed wireless networks, including its extension to 5G research based on use cases and associated technologies to address the requirements of affordable wireless broadband. The paper presents research contributions on spectrum toolboxes, including smart spectrum sharing for 5G and affordable networks. The research outcome will be presented with a proof of concept network test-bed developed in South Africa. Finally the paper will conclude with a challenge to existing and future research in technology standards for 5G to contribute towards the achievement of universal affordable broadband for the next billion customers.
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| 4. |
- Mfupe, Luzango, et al.
(författare)
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Enabling Dynamic Spectrum Access through Location Aware Spectrum Databases
- 2013
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Ingår i: AFRICON, 2013. - : Institute of Electrical and Electronics Engineers (IEEE). - 9781467359405 ; , s. 517-522
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Konferensbidrag (refereegranskat)abstract
- Dynamic spectrum access (DSA) regulations and associated radio network technologies are expected to result in efficient frequency spectrum utilization by future wireless networks. TV white space (TVWS) networks supported by location aware spectrum databases (LASDs) will be the first step to realize DSA, until cost-effective cognitive radio (CR) devices are reliable enough for building future networks. This paper describes a design and development process of a LASD for rural communities in South Africa. Apart from avoiding the difficult problem of spectrum sensing, the database also protects primary TV broadcasters from any harmful interference that might be caused due to secondary spectrum usage. The LASD is designed as a tool for testing DSA policy frameworks and enables reconfigurable TVWS networks to provide full capacity and affordable wireless broadband Internet connectivity for rural communities.
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| 5. |
- Mfupe, Luzango, et al.
(författare)
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Geo-location White Space Spectrum Databases : Models and Design of South Africa's First Dynamic Spectrum Access Coexistence Manager
- 2014
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Ingår i: KSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS. - : Korean Society for Internet Information (KSII). - 1976-7277. ; 8:11, s. 3810-3836
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Tidskriftsartikel (refereegranskat)abstract
- Geo-location white space spectrum databases (GL-WSDBs) are currently the preferred technique for enabling spectrum sharing between primary users and secondary users or white space devices (WSDs) in the very-high frequency (VHF) and ultra-high frequency (UHF) bands. This is true because technologies for making low-cost WSDs capable of autonomous sensing and detection of available white space (WS) spectrum are not yet feasible. This paper reviews the necessary enabling technical conditions to allow coexistence of primary and secondary systems in the VHF and UHF spectrum through a GL-WSDB approach. The practical implementation of South Africa's first GL-WSDB was performed. Results of WS channels available from five cities in South Africa calculated from the implemented GL-WSDB was compared with a commercially available GL-WSDB and was found to be 68% similar. Additionally, results from the implemented GL-WSDB were compared with measurements obtained from field spectrum scanning campaigns at two different locations in Cape Town, South Africa, and was found to be 64% similar.
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| 6. |
- Mfupe, Luzango, et al.
(författare)
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Multicriteria Decision Analysis of Spectrum Management Frameworks for Futuristic Wireless Networks : The Context of Developing Countries
- 2017
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Ingår i: International Journal of Mobile Information Systems. - : Hindawi Publishing Corporation. - 1574-017X .- 1875-905X. ; 2017
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Tidskriftsartikel (refereegranskat)abstract
- National regulatory authorities (NRAs) in developing countries need an accelerated means to formulate technical regulations for the telecommunications sector. This will enable countries to gain maximum benefits from the rapid advances in technology. The existing regulation-making processes are time-consuming and do not cope with the emergence of global technological changes. This article presents an efficient and quicker approach to formulate regulatory framework to govern the wireless technologies that are based on the Dynamic Spectrum Access (DSA) technique. The approach utilises Multicriteria Decision Analysis (MCDA) tools. The article uses a case study to evaluate dominant Dynamic Spectrum Management (DSM) frameworks. Finally, a sustainable DSM framework that has potential to address the digital divide challenges in the context of developing countries is proposed.
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| 7. |
- Mthethwa, Nosipho, et al.
(författare)
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Sustainable Internet4All in South African Rural and Township Communities
- 2023
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Ingår i: 2023 IEEE AFRICON. - : Institute of Electrical and Electronics Engineers (IEEE). - 9798350336214 - 9798350336221
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Konferensbidrag (refereegranskat)abstract
- International Telecommunications Unions (ITU) and Global System for Mobile Communications (GSMA) statistics show that over half of the world's population is still not connected to broadband Internet, let alone to get services based on emerging digital technologies. Most of these digitally excluded communities are situated in rural emerging economy countries and experience the brunt of the adverse effects of the digital divide. This paper presents the Council for Scientific and Industrial Research (CSIR) Television White Space (TVWS) deployment ecosystem and the complementary projects for the provision of affordable broadband connectivity in rural and township communities in South Africa. Subsequently, the paper presents the socio-economic impact achieved by the four women and youth-owned beneficiary Small, Micro, and Medium Enterprises (SMMEs) Rural Network Operators (RNOs) which were supported by the CSIR in Phase I of the project. Furthermore, this paper briefly introduces the nine women and youth-owned beneficiary RNOs that will be supported in Phase II of the project.
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| 8. |
- Somdyala, Bomkazi, et al.
(författare)
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Spectrum Regulation for Future Internet Networks in Developing Economies
- 2017
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Ingår i: 2017 ist-africa week conference (ist-africa). - : Institute of Electrical and Electronics Engineers (IEEE).
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Konferensbidrag (refereegranskat)abstract
- Radio frequency spectrum resources play a crucial role as enabler in future wireless ICT infrastructure and development of affordable broadband services. Activities by research organisations such as the CSIR and regulators such as the FCC of the USA, Ofcom of UK and ICASA of South Africa are promoting innovation-based spectrum sharing technologies to improve the effective utilisation of national spectrum resources. Experimental test-beds have been deployed to address affordable broadband demand in underserved communities. Although the technology is most beneficial for emerging economies, telecommunication regulators in Africa are still lagging behind the rest of the world in enacting the necessary enabling dynamic spectrum regulations for the industry to flourish and provide the necessary socio-economic benefit. This paper presents research to support formulation of the dynamic spectrum regulatory framework including co-existence techniques, interference avoidance and network device technology aspects in support of telecom regulators in emerging economies. Furthermore, the paper discusses the importance of spectrum sharing as a component of the emerging 5th Generation networking standard in addressing the exponentially increasing bandwidth capacity demand to enable the planned wireless ICT services.
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