Priority Scheduling for Multipath Video Transmission in WMSNS

In video data transmission over Wireless Multimedia Sensor Networks (WMSNs), in which network congestion and link failures are main characteristics, providing Quality-of-Service (QoS) is challenging. In such situation, using multipath routing protocols along with efficient packet scheduling can improve the performance of video delivery over sensor networks. In this paper we propose a new packet scheduling mechanism for multipath video transmission over WMSN. Since, different video frame types in a compressed video stream have different impact on the perceived video at the receiver; our proposed scheme for video packet scheduling is content aware that schedules transmission of different video packets over different paths. For this purpose, condition of each routing path is periodically evaluated and the high priority video packets are transmitted through high quality paths. Simulation results show that our proposed scheduling improves the quality of the perceived video at the receiver, considerably.

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