A Scheduling Algorithm for Interactive IPTV over WiMAX

In this paper we study transmission and broadcast of interactive IPTV traffic wherein in addition to multimedia traffic, traffic of user’s interactive requests are included. We have introduced a new service class for Interactive IPTV to the current service classes available in IEEE 802.16 standard. Afterwards, we propose a new scheduling algorithm for this class called I_IPTV. Proposed scheduling allocates the resources to all internal IPTV traffic including video, voice, interactive data and EPG. For transmission of its video part, we take advantage of H.264/SVC coding in which video stream is coded into a base layer and several extra ones. Then, a priority is assigned to each layer which transmission is carried out by this priority. This examination is pursued by a simulation in NS-3 simulator. Results of simulation shows that the proposed algorithm transmits the video with higher quality compared to other algorithms. Besides, interactive data is transmitted with lower delay. Finally, results reveal that video transmitted by SVC coding is performed much better compared to AVC coding.

Keywords:

IPTV , Interactive , SVC , Scheduler , WiMAX