PhD Dissertation (March 2013)

• Re-architecting Internet Access and Wireless Networks for Developing Regions (dissertation,defence presentation)

Publications

1995

• Honours Thesis: Final year Electronic Engineering thesis on "Sound synthesis using a genetic algorithm"

2004

• Conference paper: D.L. Johnson, Hardware and software implications of creating Bluetooth Scatternet devices, 2004 IEEE Africon conference
  

2005

• Conference paper: A. Smith, D.L. Johnson, Y.Kaka, Initial research results on affordable community-owned information networks in South Africa, 2005 Community Informatics Research Network (CIRN) conference

2006

• Conference paper: D.L. Johnson, Y. Kaka, J. Hay, A new grid based test bed environment for carrying out ad-hoc networking experiments, 2006 Southern African Telecommunications Networks and Applications Conference (SATNAC). (Poster for conference)
• Workshop poster: D.L. Johnson, The quest to connect 450 million rural people in Africa, 2006 Association for Progressive Communication workshop in London sponsored by the IDRC
  

2007

• Conference paper: D.L. Johnson, A. Lysko, Overview of the Meraka wireless grid test bed for evaluation of ad-hoc routing protocols, 2007 Southern African Telecommunications Networks and Applications Conference (SATNAC) (Presentation for conference)
B
• Journal paper: D.L. Johnson, A. Lysko, Comparison Of MANET Routing Protocols Using A New Grid Based Test Bed Environment, Special issue on "Advances in Wireless Mesh Networks" of the Journal of special issues on Mobility of Systems, Users, Data and Computing (MONET), Springer US
• Conference paper: D.L. Johnson, Evaluation of a single radio rural mesh network in South Africa, IEEE/ACM International Conference on Information and Communication Technologies and Development (ICTD2007) (Poster for conference)

2008

• Masters thesis: Performance analysis of mesh networks in indoor and outdoor wireless testbeds
• Conference paper: D.L. Johnson, C. Aichele, N.Ntlatlapa, A simple pragmatic approach to mesh routing using BATMAN, 2nd IFIP International Symposium on Wireless Communications and Information Technology in Developing Countries (WCITD’2008)
• Conference paper: D.L. Johnson, K. Roux 2007, Building rural wireless networks: Lessons learnt and future directions, Wireless Networks and Systems for Developing Regions (WiNS-DR'2008)
• Conference paper: A.A. Lysko, D.L. Johnson, A Numerical Study of Propagation Effects in a Wireless Mesh Test Bed, The 6th WSEAS Int. Conf. on APPLIED ELECTROMAGNETICS, WIRELESS and OPTICAL COMMUNICATIONS (ELECTROSCIENCE '08)

2009

• Journal paper: D.L. Johnson, G.P. Hancke, Comparison of two routing metrics in OLSR on a grid based mesh network, Ad Hoc Networks, Elsevier
• Journal paper: A.A. Lysko, D.L. Johnson, A Study of Propagation Effects in a Wireless Test Bed, WSEAS Transactions on Communications

2010

• Conference paper: D.L. Johnson, E.M. Belding, K. Almeroth, G. van Stam, Internet usage and performance analysis of a rural wireless network in Macha, Zambia, 4th ACM Workshop on Networked Systems for Developing Regions (NSDR 2010)
• Conference paper: P.A.K. Acharya, D.L. Johnson, E.M. Belding, Gateway-aware Routing for Wireless Mesh Networks, 4th IEEE International Workshop on Enabling Technologies and Standards for Wireless Mesh Networking (MeshTech 2010)

2011

• Conference paper: D.L. Johnson, V. Pejovic, E.M. Belding, G. van Stam, Traffic Characterization and Internet Usage in Rural Africa, 20th International World Wide Web Conference (WWW 2011)
• Conference paper: M.T. Masonta, D.L. Johnson, M. Mzyece, The White Space Opportunity in Southern Africa: Measurements with Meraka Cognitive Radio Platform , 3rd International ICST Conference on e-Infrastructure and e-Services for Developing Countries (AFRICOMM)

2012

• Conference paper: D.L. Johnson, V. Pejovic, E.M. Belding, G. van Stam, Network traffic locality in a rural African village, IEEE/ACM International Conference on Information and Communication Technologies and Development (ICTD2012)
• Conference paper: A. Anand, V. Pejovic, E.M. Belding, D.L. Johnson, VillageCell: Cost Effective Cellular Connectivity in Rural Areas, IEEE/ACM International Conference on Information and Communication Technologies and Development (ICTD2012)
• Conference paper: D.L. Johnson, V. Pejovic, E.M. Belding, G. van Stam VillageShare: Facilitating content generation and sharing in rural networks, 2nd Annual Symposium on Computing for Development (ACMDEV2012)
• Journal paper: V. Pejovic, D. L. Johnson, M. Zheleva, E. M. Belding, L. Parks, and G. van Stam, The Bandwidth Divide: Obstacles to Efficient Broadband Adoption in Rural Sub-Saharan Africa International Journal of Communcation
• Conference paper: G. van Stam, D. L. Johnson, V. Pejovic, C. Mudenda, A. Sinzala, and D. van Greunen, Constraints for Information and Communications Technologies implementation in rural Zambia Africomm 2012
• Conference paper: A. Lysko , D.L. Johnson, M.O.R. Mofolo, Significant Performance Improvement Obtained in a Wireless Mesh Network Using a BeamSwitching Antenna, 2012 Southern African Telecommunications Networks and Applications Conference (SATNAC)

2013

• Conference paper: M. Zheleva, A. Paul, D.L. Johnson, and E.M. Belding, Kwiizya:Local cellular network services in remote areas, Mobisys’13
• Conference paper: C. Mudenda, D.L. Johnson, L. Parks, G. van Stam, Power Instability in Rural Zambia, Case Macha, 5th International ICST Conference on e-Infrastructure and e-Services for Developing Countries (AFRICOMM)
• Conference paper: D.L. Johnson, E.M. Belding, C. Mudenda, Kwaabana: file sharing for rural networks, 4th Annual Symposium on Computing for Development (ACMDEV2013)

2014

• Conference paper: V. Pejovic, D.L. Johnson, M. Zheleva, E.M. Belding, and A.Lysko, VillageLink: Wide-area Wireless Coverage, 6th International Conference on Communications Systems and Networks (COMSNETS 2014)
• Conference paper: A. Lysko, M.T. Masonta, M.R.O. Mofolo, L. Mfupe, L. Montsi, D.L. Johnson, F. Mekuria, D.W. Ngwenya, N.S. Ntlatlapa, A. Hart, C. Harding, A. Lee, First large TV white spaces trial in South Africa: A brief overview, Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2014
• Conference paper: S. Dlamini, M.T. Masonta, D.L. Johnson, Building an argument for Internet expansion in Dwesa - an under-serviced rural community in South Africa, International ICST Conference on e-Infrastructure and e-Services for Developing Countries (AFRICOMM 2014)

2015

• Book: A.K. Mishra, D.L. Johnson, White Space Communication: Advances, Developments and Engineering Challenges, Springer International Publishing, November 2014
• Book chapter: A. Lysko, M.T. Masonta, D.L. Johnson, The Television White Space Opportunity in Southern Africa: From Field Measurements to Quantifying White Spaces, White Space Communication. Springer International Publishing, 2014. pp. 75-116
Book chapter: V. Pejovic, D.L. Johnson, M. Zheleva, E.M. Belding, VillageLink: A Channel Allocation Technique for Wide-Area White Space Network, White Space Communication, Springer International Publishing, 2014, pp. 249-280
• Poster: M. Vigil, D. Johnson, E. Belding, Localized Content for Village Schools, Mobisys 2016

2016

• Conference paper: A. Moret, A. Sathiaseelan, M. Zennaro, F. Dondon, E. Pietrosemoli, D.L. Johnson Open and Regionalised Spectrum Repositories for Emerging Countries, GAIA Workshop 2016
• Conference paper: A. Phokeer, D.L. Johnson, M. Densmore Characterisation of mobile data usage in township communities, 2016 Southern African Telecommunications Networks and Applications Conference (SATNAC)
• Conference paper: N. Zlobinsky, D.L. Johnson A Channel Selection Algorithm for a TVWS mesh network, 2016 Southern African Telecommunications Networks and Applications Conference (SATNAC)
• Conference paper: R. Maliwatu, N. Zlobinsky, M. Densmore, D.L. Johnson A road map for wireless mesh routing with DSA, 2016 Southern African Telecommunications Networks and Applications Conference (SATNAC)
• Conference paper: A. Takyi, M. Densmore, D.L. Johnson Collaborative neighbour monitoring in TV white space networks, 2016 Southern African Telecommunications Networks and Applications Conference (SATNAC)
• Conference paper: M. Lamola, D.L. Johnson, A. Lysko, N. Zlobinsky TVWS devices Spectrum Mask Test and Analysis, 2016 Southern African Telecommunications Networks and Applications Conference (SATNAC)
• Conference paper: A. Phokeer, A. Aina, D.L. Johnson DNS Lame delegations: A case-study of public reverse DNS records in the African Region , Africomm 2016
• Conference paper: D.L. Johnson, G. van Stam The shortcomings of globalised Internet technology in Southern Africa , Africomm 2016
• Conference paper: R. Maliwatu, A. Lysko, D.L. Johnson, S. Hadzic Exploring RSSI Dependency on Height in UHF for throughput optimisation , Africomm 2016
• Conference paper: D.L. Johnson, N. Zlobinsky, A. Lysko, M. Lamola, S. Hadzic, R. Maliwatu, M. Densmore Head to head battle of TV White Space and WiFi for connecting developing regions, Africomm 2016
• Conference paper: S. Hadzic, A. Phokeer, D.L. Johnson TownshipNet: A localized hybrid TVWS-WiFi and cloud services network, 2016 IEEE International Symposium onTechnology and Society (ISTAS)
• Conference paper: R. Maliwatu, A. Lysko, D.L. Johnson Exploring RSSI Dependency on Height in UHF for throughput optimisation, 3rd IEEE International Conference on Advances in Computing and Communication Engineering (ICACCE)
• Magazine: D.L. Johnson, C. Mikeka Malawi and South Africa pioneer unused TV frequencies for rural broadband, IEEE Spectrum, September 2016
• Conference: D.L. Johnson, C. Mikeka Malawi and South Africa pioneer unused TV frequencies for rural broadband, IEEE Spectrum, September 2016

2017

• Conference paper: A. Takyi, M. Densmore, S. Hadzic, D.L. Johnson Performance analysis of a collaborative DSA-based network with malicious nodes, Africomm 2017

2018

• Conference paper: M.R. Lorini, M. Densmore, D.L. Johnson, S. Hadzic, H. Mthoko, G. Manuel, M. Waries, A. van Zyl Localize-It: Co-designing a Community-Owned Platform, International Development Informatics Association Conference
• Conference paper: R. Maliwatu, N. Zlobinsky, M. Lamola, A. Takyi, D.L. Johnson, M. Densmore Experimental Analysis of 5 GHz WiFi and UHF-TVWS Hybrid Wireless Mesh Network Back-Haul Links, International Conference on Cognitive Radio Oriented Wireless Networks
• Conference paper: R. Maliwatu, A. Lysko, D.L. Johnson Experimental Propagation Modelling without a Dedicated Transmitter, 2018 International Workshop on Computing, Electromagnetics, and Machine Intelligence (CEMi)

2019

• Conference paper: A. Phokeer, J. Chavula, D.L. Johnson, M. Densmore, G. Tyson, A. Sathiaseelan, N. Feamster On the potential of Google AMP to promote local content in developing regions, Comsnets 2019

Presentations

2016