Abstract
Owing to the inherent nature, data packets in internet protocol television (IPTV) systems face two major challenges; loss and delay. On the other hand, there is a stringent constraint of minimum speed to make possible delivery of the right number of frames per second to deliver multimedia content in mobile environment. This implies that the inadequate connection speed and bandwidth available for large IPTV customer base can trim down the service quality delivered. In this paper, we have thoroughly investigated the impact of various factors which affect the key quality parameters in IPTV systems which employs worldwide interoperable microwave access WiMAX. Also, we have proposed to employ smart antenna for WiMAX network. Specifically, we have carried out a detailed study of the effect of the following parameters: (1) transmission power; (2) distance variation; (3) antenna gain; (4) channel bandwidth, and (5) mobility under six different categories of scenarios (1) variable distance between nodes; (2) various modulation techniques; (3) variable transmitted power; (4) variable coverage area; (5) different types of antennas, and (6) variable number of connection. The simulation results showed that WiMAX makes a great development in the proposed IPTV system, while ensuring that packet delay and jitter meet the requirements of video content streaming to access IPTV services anywhere and anytime under the effect of changing power ratings, modulation techniques, and distance through WiMAX coverage area. Therefore, the proposed system satisfies higher throughput rates and solves delay problems; as well as providing a stable and monotonic response for all discussed QoS parameters.