Qualifications

Profile

Before joining Unitec, Samad was a network designer, engineering consultant, and Principal Planning Engineer for Telecom New Zealand in Wellington.

Courses taught

• Cloud Computing (Masters course)
• Mobile and Wireless Communications (Masters course)
• Mobile Security (Masters course)
• Data Communications and Networks
• Advanced Data Communications
• Network Design and Implementation
• Network Administration and Support
• Information Technology Infrastructure 2
• Special Topics (Master of Computing)

Research areas

Research topics available in the following subjects :

• Performance Evaluation of LANs 
• TCP/IP network evaluation 
• Cyber Security: Denial of Service Cyber Attack Evaluation
• Mobile Communications
• Wireless LANs
• Simulation and Modeling of LAN/Telecommunication Systems
• Mobile Communications
• Traffic Engineering and Dimensioning of Telecommunications Systems
• Performance Modeliing of Telcommunications Systems
• High speed networks (ATM)

Publications

Kolahi, S. S., Shaheen, T., Anderson, E., Aljadani, R., & Ceyddique, C. (2023). IEEE 802.11ac WLAN Analysis in 160Mhz Channel. IEEE, 2023 International Conference on Information Networking (IEEE ICOIN).

Tang, H., & Kolahi, S. S. (2023). Evaluation of HTTP Flood DDoS Cyber Attack on Apache2 Web Server with Linux Ubuntu 22.04. IEEE, 2023 IEEE International Conference on Computing (ICOCO 2023).

Tuitupou, M., & Kolahi, S. S. (2022). Latest wireless LAN evaluation. MIT - Unitec Research Symposium 2022, Auckland.

Tang, H., & Kolahi, S. S. (2022). Evaluation of a web server under cyber attack. MIT - Unitec Research Symposium 2022, Auckland.

Tuifaiga, A.A., Ram, P.A., & Kolahi, S.S. (2021). Performance Comparison of IPv6 in 802.11ac WLAN in Windows and Linux Environment. IEEE, TENCON 2021 - 2021 IEEE Region 10 Conference (IEEE TENCON).

Kolahi, S. S., Sooran, A. H., Nasim, F., & Khan, M. M. U. (2021). Performance Comparison of IEEE802.11ac vs IEEE 802.11n WLAN in IPv6. In Barolli L., Woungang I., Enokido T. Advanced Information Networking and Applications. AINA 2021. Lecture Notes in Networks and Systems, vol 227. ed. (pp. 426-435). Switzerland: Springer.

S. S. Kolahi, V. S. Hora, A. P. Singh, S. Bhatti and S. R. Yeeda, (2020). Performance Comparison of Cloud Computing/IoT Virtualization Software, Hyper-V vs vSphere,. Dubai, 2020 IEEE Advances in Science and Engineering Technology International Conference.

Kolahi, S. S., & Almatrook, A. A. (2019). The Impact of Human Shadowing/Movement on Performance of 802.11ac Client-to-Server WLAN. International Journal of Computing and Digital Systems (Vol. 8 (3)).

Kolahi, S. S., Sooran, A. K., Khan, M.M.U., & Nasim, M.F. (2019). Performance Comparison of Peer-Peer vs Client-Server 802.11ac WLAN using 80Mhz Channel Size. International Journal of Computing and Digital Systems (Vol. 8 (5)).

Kolahi, S. S., & Almatrook, A. A. (2017). Impact of security on bandwidth and latency in IEEE 802.11ac client-to-server WLAN. IEEE, 2017 Ninth International Conference on Ubiquitous and Future Networks (IEEE ICUFN),.
https://hdl.handle.net/10652/4181

Kolahi, S. S., Barmada, B., & Mudaliar, K. (2017). Defence mechanisms evaluation against RA flood attacks for Linux-victim node. IEEE, Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2017).

Kolahi, S. S., Mudaliar, K., Zhang, C., & Gu, Z. (2017). Impact of IPSec security on VoIP in different environments. IEEE, 2017 Ninth International Conference on Ubiquitous and Future Networks (IEEE ICUFN),.
https://hdl.handle.net/10652/4182

Kolahi, S. S., Cao, Y., & Chen, H. (2016). Impact of SSL Security on Bandwidth and Delay in IEEE 802.11n WLAN Using Windows 7. In IEEE, 10th International Symposium on Communication Systems, Networks and Digital Signal Processing.
https://hdl.handle.net/10652/3565

Kolahi, S. S., & Li, P. (2016). Performance Analysis of Some Operating Systems in Wireless 802.11n Networks. International Journal of Computing and Network Technology (Vol. 4(1)).
https://hdl.handle.net/10652/3387

Kolahi, S. S., Treseangrat, K., & Sarrafour, B. A. (2015). Analysis of UDP DDoS Cyber Flood Attack and Defense Mechanisms on Webserver with Windows Sever 2012 and Linux Ubuntu 13. In IEEE, Proceedings of the International Conference on Computer, Information and Telecommunication Systems (CITS).
https://hdl.handle.net/10652/3612

Kolahi, S S., Treseangrat, K., & Sarrafpour, B. (2015). Analysis of UDP DDoS flood cyber attack and defense mechanisms on Web Server with Linux Ubuntu 13. IEEE, 2015 International Conference on Communications, Signal Processing, and their Applications (IEEE ICCSPA).

Kolahi, S. S., Treseangrat, K., & Sarrafpour, B. (2015). Analysis of UDP DDoS flood cyber attack and defense mechanisms on Web Server with Linux Ubuntu 13. In IEEE, 2015 International Conference on Communications, Signal Processing, and their Applications (IEEE ICCSPA).
https://hdl.handle.net/10652/3613

Kolahi, S., Alghalbi, A. A., Ahmed, S. S., Lad, D., & Alotaibi, A. F. (2014). Comparison of Defense Mechanisms Against TCP SYN Flood Cyber Attack. In IEEE, 6th International Congress on Ultra Modern Telecommunications and Control Systems (IEEE ICUMT).
https://hdl.handle.net/10652/2981

Kolahi, S. S., Cao, Y., and Chen, H. (2013). Bandwidth-IPSec Security Trade-off in IPv4 and IPv6 in Windows 7 Environment. Second International Conference on Future Generation Communication Technologies (FGCT 2013), December 12-14, London, UK.
https://hdl.handle.net/10652/3389

Kolahi, S. S., Cao, Y., and Chen, H. (2013). Evaluation of IPv6 with IPSec in 802.11n WLANUsing Fedora 15 Operating System. IEEE Symposium on Computers and Communication, July 7-10, Split, Croatia.
https://hdl.handle.net/10652/3390

Kolahi, S. S., and Chand, N. (2012). TCP Throughput of IPv6 and IPv4 on IEEE 802.11n Wireless Client Server LAN in Windows Vista/XP -- Server 2008 Environment. I2012 Sixth International Conference on Innovative Mobile and Internet Services in Ubiquitous Computing (IEEE IMIS), 4-6 July 2012, doi: 10.1109/IMIS.2012.193.

Kolahi, S. S., Li, P., Argawe, M., and Safdari, M. (2012). WPA2 security-bandwith trade-off in 802.11n peer-peer WLAN for IPv4 and IPv6 using Windows XP and Windows 7 operating systems. 2012 IEEE Symposium on Computers and Communications (ISCC), 1-4 July 2012, doi: 10.1109/ISCC.2012.6249358.
https://hdl.handle.net/10652/3384

Kolahi , S. S., Shah, M. A., and Joseph, J. (2012). Performance of VoIP on IPv4 and IPv6to4 Tunnel Using Windows Vista and Windows 7. Recent Progress in Data Engineering and Internet Technology Lecture Notes in Electrical Engineering, Publisher: Springer Verlag, Berlin, 978-3-642-28798-5.

Kolahi, S. S. (2011). Simulation Model, Warm-up Period, and Simulation Length of Cellular Systems. Second International Conference on Intelligent Systems, Modelling and Simulation (ISMS), IEEE,.
https://hdl.handle.net/10652/3388

Kolahi, S. S., and Li, P. (2011). Evaluating IPv6 in Peer-to-Peer 802.11n Wireless LANs,. IEEE Internet Computing, ISSN 1089-7801, Published by the IEEE Computer Society, IEEE headquarters, Park Avenue, New York. (Vol. 15(4)).
https://hdl.handle.net/10652/3361

Kolahi , S. S., and Soorty, B. (2011). Bandwidth Limitations of Gigabit Ethernet. 2011 16th European Conference on Networks and Optical Communications (NOC), IEEE.

Kolahi, S. S., and Soorty, B. K. (2011). Evaluation of Gigabit Ethernet Local Area Networks in Windows Vista-Server 2008 Environment,. IEEE International Conference on Advanced Information Networking and Applications (AINA).

Li, P., Kolahi, S. S., Safdari, M., and Argawe, M. (2011). Effect of WPA2 Security on IEEE 802.11n Bandwidth and Round Trip Time in Peer-Peer Wireless Local Area Networks. IEEE International Conference on Advanced Information Networking and Applications (AINA), 2011.

Kolahi, S. S., Singla, H., Ehsan, M. N., and Dong , C. (2011). The influence of WPA2 security on the UDP performance of IPv4 and IPv6 using 802.11n WLAN in Windows 7-Windows 2008 environment. 2011 Baltic Congress on Future Internet Communications (BCFIC Riga), IEEE.
https://hdl.handle.net/10652/3413

Kolahi, S. S., Narayan, S., Nguyen, D.D.T., and Sunarto, Y. (2011). Performance Monitoring of Various Network Traffic Generators. 13th International Conference on Computer Modelling and Simulation (UKSim), IEEE UKSim,.
https://hdl.handle.net/10652/3699

Soorty, B., Kolahi, S. S., Chand, N., and Qu, Z. (2010). Performance Comparison of Category 5e vs. Category 6 Cabling Systems for both IPv4 and IPv6 in Gigabit Ethernet. Proceedings of 10th IEEE International Conference on Computer and Information Technology.
https://hdl.handle.net/10652/3414

Kolahi , S. S., and Shah, M. (2010). Performance Comparison of Multiple Vo IP Codecs Using Hard and Soft Routers on IPv4 and IPv6. Global Business & Technology Association, Twelfth Annual International Conference, South Africa, July 5-9, 2010.

Kolahi , S. S. (2010). Traffic dimensioning of cellular systems using simulation : a simulation guide for cellular systems. Saarbrucken, Germany, Lambert Academic Publishing.

Manford, C., Kolahi, S. S., Soorty, B., Qu, Z., and Chand, N. (2010). UDP Performance Comparison of IPv4 and IPv6 using Windows Vista-Server2008 and Windows XP-Server2008 LANs. Proceedings of Advances in Computer Science and Engineering (ACSE 2010), Sharm El Sheikh, Egypt, March 15 - 17. http://www.actapress.com/PaperInfo.aspx?PaperID=38442&reason=500 (Vol. Online).

Shukla, R., Kolahi, S. S., Freeth, R., and Kumar, A. (2010). Wireless Network Security in Educational Institutes. Proceedings of the Eighth Annual Hawaii International Conference on Education, Honolulu, Hawaii, USA, 4-7 January. http://www.hiceducation.org/EDU2010.pdf (Vol. Online.).

Shukla, R., Kolahi, S. S., Freeth, R., and Kumar, A. (2010). Educational institutes: Wireless network standards, security and Future. Proceedings of 5th International Conference on Computer Sciences and Convergence Information Technology (ICCIT).

Kolahi, S. S., and Li, P. (2010). The Effect of WPA2 Security on the Performance of IPv4 and IPv6 Using UDP on 802.11n Peer-Peer Wireless Local Area Networks. 2010 3rd International Conference on Computational Intelligence and Industrial Applications PACIIA 2010.

Kolahi, S. S., and Chand, N. (2010). UDP Performance of IPv4 and IPv6 in IEEE 802.11n Wireless Client Server LANs using various Windows Operating Systems. Proceedings of 3rd International Confrence on Computational Intelligence and Industrial Applications IEEE PACIIA 2010.

Kolahi, S. S., and Shah, M. A. (2010). Performance Monitoring of VoIP with Multiple Codecs on Linux and Windows using IPv4 and IPv6. Proceedings of 3rd International Confrence on Computational Intelligence and Industrial Applications IEEE PACIIA 2010.

Kolahi, S. S. (2010). Journal Editorial Board, Journal of Convergence Information Technology,. Journal of Convergence Information Technology, ISSN : 1975-9320.

Kolahi, S. S. (2010). GABTA (Journal of Global Business and Technology Journal) Reviewers Board. GABTA (Journal of Global Business and Technology Journal) Reviewers Board, 1553-5495.

Kolahi, S. S., Soorty, B. K., Chand, N., and Qu, Z. (2010). Performance Comparison of IPv4 and IPv6 in Peer-Peer and Client Server Local Area Networks. Proceedings of The 2010 IEEE International Conference on Computer and Information Technology.

Kolahi, S.S., Qu, Z., Soorty, B., and Chand, N. (2009). The Performance of IPv4 and IPv6 using UDP on IEEE 802.11n WLANS with WPA2 Security. Proceedings of the 2nd International Conference on International Sciences: Information Technology, Culture and Human Interaction. ACM Press, 978-1-60558-710-3 (Vol. 403).
https://hdl.handle.net/10652/3430

Kolahi, S., Qu, Z., Soorty, B., and Chand, N. (2009). The Impact of Security on the Performance of IPv4 and IPv6 Using 802.11n Wireless LAN. Proceedings of the Third International Conference on New Technologies, Mobility and SecurityThird International Conference on New Technologies, Mobility and Security, IEEE NTMS'2009.

Kolahi, S., Qu, Z., Soorty, B., and Chand, N. (2009). Performance Analysis of IPv4 and IPv6 on Windows Vista and Windows XP over Fast Ethernet in Peer-Peer LAN. Proceedings of the Third International Conference on New Technologies, Mobility and SecurityThird International Conference on New Technologies, Mobility and Security, IEEE NTMS'2009.

Kolahi, S. (2009). The Impact of Wireless Security on the performance of Windows Operating Systems. IEEE Wireless Workshop.

Kolahi, S. (2009). Maximising Cell Phone Network Capacity. Reidy, J. Advance Magazine1176-7391 (Vol. Summer).

Manford, C., Kolahi, S.S., Qu, Z., Soorty, B., and Chand, N. (2009). UDP Performance Analysis of IPv4 and IPv6 on Windows Vista and Windows XP over Fast Ethernet Peer-Peer LAN. Proceedings of the 4th IEEE International Conference on Ubiquitous Information Technologies and Applications ICUT'09:, 978-1-4244-5131-9.
https://hdl.handle.net/10652/3429

Kolahi, S.S. (2008). Traffic engineering of CDMA networks using simulation and modelling. University of Auckland (Vol. PhD).

Kolahi, S., Shukla, R., Kumar, A., and Freeth, R. (2008). Wireless technology in educational institutes. 2008 International Conference on Computer Science and Software Engineering, IEEE (Vol. CD Rom).

Kolahi, S. (2008). Comparison of CDMA tele-traffic models. IEEE Symposium on Computers and Communications (Vol. CD Rom).

Narayan, S., Kolahi, S., Sonanto, Y., Nguyen, D., and Mani, P. (2008). Performance comparison of IPv4 and IPv6 on various Windows operating systems. Proceedings of the 11th International Conference on Computer and Information Technology (ICCIT) (Vol. CD Rom).

Narayan, S., Kolahi, S., Waiariki, R., and Reid, M. (2008). Performance analysis of network operating systems in local area networks. Grebennikov, A., and , A. Proceedings of the 2nd WSEAS International Conference on Computer Engineering and Applications (Vol. CD Rom).

Narayan, S., Kolahi, S., Sunarto, Y., Nguyen, D., and Mani, P. (2008). The influence of wireless 802.11g LAN encryption methods on throughput and round trip time for various windows operating systems. 2008 Communication Networks and Services Research Conference (Vol. CD Rom).

Kolahi, S.S., Narayan, S., Sunarto, Y., Nguyen, D., and Mani, P. (2008). The impact of wireless LAN security on performance for different windows operating systems. IEEE Symposium on Computers and Communications (Vol. CD Rom).
https://hdl.handle.net/10652/3391

Kolahi, S.S. (2007). Analysis of results in simulation and modelling of CDMA systems. Proceedings of the 12th IEEE Symposium on Computers and Communications (ISCC'07).
https://hdl.handle.net/10652/3685

Kolahi, S. (2007). Issues in simulation and modelling of communication systems. World Scientific and Engineering Academy Society Transaction on Communication (Vol. 6 2).

Kolahi, S. (2006). Comparison of FDMA, TDMA and CDMA system capacity. Bojkovic, Z. Proceedings of the 10th WSEAS International Conference on Communications (Vol. CD Rom).

Kolahi, S. (2006). Application of importance sampling in simulation of buffer policies in ATM networks. WSEAS (World Scientific and Engineering Academy and Society) Transaction on Communications (Vol. 5 2).

Shridhar, A., Joyce, D., and Kolahi, S. (2006). Security issues that arise in IEEE 802.11x and 3G wireless networks. New Zealand Journal of Applied Computing and Information Technology (Vol. 10 1).

Rudsar, S., Joyce, D., and Kolahi, S. (2006). Status of wireless networks in educational institutes in Auckland. New Zealand Journal of Applied Computing and Information Technology (Vol. 10 1).

Kolahi, S. S. (2005). Impact of the various tiers of interfacing cells on CDMA systems, Proceedings of the 4th WSEAS International Conference on Information Security, Communications and Computers (ISCOCO 2005) (CD-Rom ed., pp. 482-487). Tenerife, Canary Islands: WSEAS. Paper presented at the ISCOCO 2005, 16-18 December, Tenerife, Canary Islands.

Kolahi, S. S. (2005). Impact of propagation parameters on neighbouring cells interference in power controlled CDMA systems, Proceedings of the IEEE Tencon 2005 (CD-Rom ed., pp. 1C-09.4). Melbourne: Swinburne Press. Paper presented at the IEEE Tencon 2005, 21-24 November, Melbourne.

Kolahi, S. S. (2005). Application of importance sampling in simulation of buffer policies in ATM networks, Proceedings of the 4th WSEAS International Conference on Information Security, Communications and Computers (ISCOCO 2005) (CD-Rom ed., pp. 53-58). Tenerife, Canary Islands: WSEAS. Paper presented at the ISCOCO 2005 Conference, 16-18 December, Tenerife.

Kolahi, S. S., Williamson, A. G., & Sowerby, K. W. (2004). Other cells interference of CDMA systems. IEE Electronics Letters, 40 (16), 1134-1136.

Kolahi, S. S., Williamson, A. G., & Sowerby, K. W. (2004). Sensitivity analysis of the reverse link erlang capacity of CDMA systems, Proceedings: IEEE Wireless Communications and Networking Conference, 2004. WCNC. 2004 IEEE (Vol. 4, pp. 2220-2225). Paper presented at the IEEE Wireless Communications and Networking Conference, 21-25 March, Atlanta, USA.

Kolahi, S., Williamson, A. G., & Sowerby, K. W. (2003). Influence of parameters on CDMA traffic system traffic capacity. IEE Electronics Letters, 39 (17), 1277-1279.

Kolahi, S. (2003). Future is wireless. Presented to the 16th Annual Conference of the National Advisory Committee on Computing Qualifications, 6-9 July, Palmerston North.

Kolahi, S. (2003). CDMA traffic analysis. Presented to the IEEE New Zealand Wireless Workshop, 4 September, Auckland.

Kolahi, S. (2003). Congestion control in ATM networks. New Zealand Journal of Applied Computing and Information Technology, 7 (1), 50-58.

Kolahi, S. S. (2002). Evolution towards third generation wireless networks. Presented to the 15th annual conference of the National Advisory Committee on Computing Qualifications: Technology and Innovation: New Understandings and Influences, 2-5 July, Hamilton.

Kolahi, S. S. (2002). On Erlang capacity of CDMA systems. In C. Omidyar (Ed.), Mobile and Wireless Communications (pp. 227-232). Norwell: Kluwer Academic Publishers.

Kolahi, S. S. (2002). Other cells' interference of power controlled CDMA systems, Proceedings of IEEE International Conference on Personal Wireless Communications (pp. 319-322). New Delhi: Institute of Electrical and Electronics Engineers Inc. Paper presented at the ICPWC 2002, 15-17 December, New Delhi.

Kolahi, S. S. (2002). Comparison of fixed networks vs wireless CDMA networks, Proceedings of IEEE International Conference on Personal Wireless Communications (pp. 115-120). New Delhi: Institute of Electrical and Electronic Engineers Inc. Paper presented at the ICPWC 2002, 15-17 December, New Delhi.

Kolahi, S. (2001). Modern Wireless Communication Protocols. In S. Mann (Ed.), Proceedings of the 14th Annual Conference of the National Advisory Committee on Computing Qualifications (pp. 333-337). Dunedin: Wickliffe Press, 2-5 July, Napier.

Kolahi, S. (2001). Simulation and Modelling of Communication Systems. Presented to the 14th Annual Conference of the National Advisory Committee on Computing Qualifications, 2-5 July, Napier.

Kolahi, S. (2001). Student Success Versus Class Attendance. Presented to the 14th Annual Conference of the National Advisory Committee on Computing Qualifications, 2-5 July, Napier.