MethodologyMethodologyThis Project used a mixed research methodology. A qualitative analysis of literature was done to determine answers to the research questions and experiments were performed to determine IPTV capacity over UDP on IEEE 802.11n networks using Distributed Internet Traffic generator (D-ITG)

BackgroundBackgroundInternet Protocol Television (IPTV) is regarded as the future of television because of the benefits like lower cost and higher flexibility. Similarly IEEE 802.11 based wireless networks, also known as Wireless Fidelity (WiFi), are becoming increasingly famous because of advantages such as high bandwidth, improved availability and portability. The combination of IPTV and WiFi seems very promising because of their combined benefits but it also has significant challenges such as the factors limiting IPTV capacity.

MotivationMotivation Extremely low IPTV capacity over WiFi

networks. For example, IEEE 802.11b network & IEEE 802.11g at the highest data rate of 11 Mbps and 54 Mbps should ideally support 4 & 10 IPTV users, whereas, only 2 & 6 IPTV users respectively in real conditions

IPTV performance degrades significantly in the presence of background TCP traffic.Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) does not coexist fairly with each other. Datagram Congestion Control Protocol (DCCP) can be a suitable replacement for UDP.

Conclusion and Future WorkConclusion and Future WorkAP acts as the main point in the IPTV communication network because of the CSMA/CA mechanism of IEEE 802.11. IPTV capacity is affected by AP buffer size up to some extent but it also increase the delay. In presence of TCP, using DCCP offers better IPTV capacity than UDP and also provides better bandwidth share to TCP.Experimentation to investigate IPTV capacity over DCCP on IEEE 802.11ac network and determination of optimum AP buffer size can be areas for future work. The findings of the project can act as a foundation step for research in this direction. This work can also be of help to infrastructure engineers, IPTV engineers etc. in planning and implementation of IPTV infrastructure

AcknowledgementsAcknowledgements

ReferencesReferences

I would like to thank God Almighty for His guidance in my life. I would also like to express gratitude to my supervisor, Dr. Zawar Shah for his help and support in completing this project.

Capacity Analysis of IPTV over IEEE 802.11nRohit Kapoor RP10-1/2015-AKL

Post Graduate Diploma in IT (21402186)Supervised by Dr Zawar Shah

Submitted on 13/05/2014

ObjectivesObjectivesThis study determines the reasons for low IPTV capacity over IEEE 802.11n network and investigates the causes for performance degradation in the presence of competing non real time TCP trafficResearch QuestionsRQ1: What is the IPTV capacity over IEEE 802.11n?RQ2: What are the factors affecting IPTV capacity over IEEE 802.11n network?RQ2: What is the effect of transport layer protocols on IPTV capacity?

Literature ReviewLiterature Review

Fig 3: Number of IPTV users supported vs delay Table 3: Comparison of Experimental Results with Literature results

Fig 2: Number of IPTV users supported vs packet Loss Table 2: No. of IPTV users supported by Different WiFi standards

Fig 4: Simultaneous UDP and TCP Traffic(Ullah et al., 2011)

Table 4: Number of IPTV users supported by UDP and TFRC protocol respectively with TCP (FTP) Traffic

(Saleh, Shah & Baig, 2013) (Wan, Cai & Gulliver,2011)

Table 1: Performance Statistics - UDP/DCCP in presence of TCP traffic(Saleh, Shah & Baig, 2013)

Fig 1: Experimental Setup

ResultsResults

Research OutcomesResearch Outcomes

IPTV capacity on IEEE 802.11n over UDP(Guo, Foh, Cai, Niyati & Wong, 2011), (Saleh, Shah &

Baig, 2013) Factors Affecting IPTV Capacity(Shihab, Wan, Cai & Gulliver, 2010) (Saleh, Shah &

Baig,2013) (Atenas, Sendra, Gracia & Lloret, 2012) Effect of Transport Layer Protocols on IPTV

Capacity.(Shihab, Wan, Cai & Gulliver, 2010) (Saleh, Shah &

Baig,2013)

Only 17 IPTV users can be supported on IEEE 802.11n on UPD (without UDP traffic)

Factors affecting IPTV capacity are Access point (AP) Buffer, packet Loss, Delay and Throughput

AP buffer size is the bottleneck that limits the IPTV capacity Packet loss gets violated first and then end to end delay IPTV capacity can increase to a certain extent with the increase in

buffer size TCP and UDP does not coexist fairly Out of the two variants of DCCP, TFRC can support more number

of IPTV users can TCP-like TFRC provides better IPTV capacity than UDP in presence of TCP

traffic, and also the bandwidth share to TCP is improved

Atenas, M. , Sendra, S., Gracia, M., & Lloret, J., (2012). IPTV performance in IEEE 802.11n WLANs. IEEE International conference on telecommunications, 929-933. doi:978-1-4244-8865-0/10

Gidlund, M. , & Ekling, J. (2008). IPTV distribution over wireless networks. IEEE transactions on summer electronics, 637-643. doi:00983063/08

Guo, T., Foh, C., Cai, J., Niyato, D., & Wong, E. (2011). Performance Evaluation of IPTV over Wireless Home Networks. IEEE Transactions on Multimedia, vol. 13, no. 5.

Saleh, S. , Shah, Z., & Baig, A. (2013). IPTV capacity analysis using DCCP over IEEE 802.11n. Vehicular technology conference , 1-5. doi:10.1109/VTCFall.2013.6692252

Saleh, S., Shah, Z., & Baig, A. (2014). Improving QoS of IPTV & VOIP over IEEE 802.11n. Journal of Computers & Electrical Engineering, 12-23 (in Press)

Shihab, E., Wan, F., Cai, L., & Gulliver, A. (2010). Performance Analysis of IPTV Traffic in Home Networks. IEEE Global Telecommunications Workshop (GLOBECOM), 341-345. doi:1930-529X/07

Ullah, I., Shah, Z., Owais, M., & Baig, A. (2011). VoIP and tracking capacity over WiFi networks.In Vehicular Technology Conference,1-5.doi: 10.1109/VETECS.2011.5956440

Table 5: IPTV Capacity on TCP-Like and TFRC (Wan, Cai & Gulliver,2011)

Standard Number of IPTV users supported

802.11b 2

802.11g 6

802.11n 17

Results Number of IPTV users supported in IEEE 802.11n over UDP

Experimental Results 16

Literature Results 17

Protocol Number of IPTV users supported

TCP-Like 11

TFRC 23

Protocol Number of IPTV users supported

UDP 13

TFRC 20