Topic: An investigation of large scale challenges with live video streaming over Wi-Fi access networks

• Main Author: Kanani, Sepideh
• Format: Others
• Language: English
• Published: Norges teknisk-naturvitenskapelige universitet, Institutt for telematikk 2014
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-25561

Due to growing demand for wireless access technology (802.11 standards), high capacity multimedia transmission over wireless pose a challenge, by taking note that video streaming has gained enormous popularityand is accountable for a large fraction of current internet traffic.In orderto have a satisfy video transmission wireless network especially when itcomes to large scale user and roaming intensity, many requirement mustbe considered.Large throughput and minimum delay are the significant requirementsto keep the transaction stable and seamless, moreover jitter is anotherimportant factor that can result in degradation and quality of receivedvideo. To achieve seamless live video stream and high level of quality ofservice (QoS) and quality of experience (QoE) different technologies mustbe studied, such as video encoding/decoding platform, transmission technology (unicast/multicast) mobility models and efficient handoff method.These issues are addressed in this project.During this work, several experiments are done in NS2 simulator to studythe impact of increasing in number of users on the QoS parameters suchas delay, throughput and jitter, while an H.264 SVC video stream idtransmit over the wireless network in both multicast and unicast manner.Also, the effect of Random Waypoint and Gauss-Markov mobility modelon the delivering performance studied. The experiments tested duringmovement inside an AP coverage area as well as movement to new APdomain (Handoff). Hierarchical Mobile IPv6 is the protocol used in thesimulation, in order to have a faster handoff and reduction in the amountof signaling load.