Hussein  M. Hathal, 
    Channel Variation Effects on Video Streaming of WiMAX Networks,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 9,
    2019,
    Pages 2808-2812,
    ISSN 1816-949x,
    jeasci.2019.2808.2812,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.2808.2812)
    Abstract: Video streaming stay one of internet services that became important services to subscribers. Based
on WiMAX networks, this service will provide to all subscribers that used internet. WiMAX networks provide
advantages for real time application for internet protocols such as video streaming or voice. In this study,
variation effect of channel types evaluated on video streaming of WiMAX which are (vehicular, suburban,
outdoor to indoor and free space). Scheduling services discussed depending on real time application service.
OPNET Simulator Version 14.5 is used to model the design proposed. Best results are achieved for throughput
using rtPS with suburban channel type and QAM code modulation. Minimum packet delay (end-to-end)
achieved using ertPS with channel type (free space) and QAM code modulation.
    Keywords: ertPS;UGS;QAM;rtPS;WiMAX;VoIP;IPTV;QoS;OPNET